From 469f1ec2659f93252b40fa975d629281deb9ab27 Mon Sep 17 00:00:00 2001 From: Benny Rochwerger Date: Sun, 12 Dec 2021 15:22:12 +0200 Subject: [PATCH] added to greering message the hostname --- .venv/bin/activate | 76 + .venv/bin/activate.csh | 37 + .venv/bin/activate.fish | 75 + .venv/bin/easy_install | 11 + .venv/bin/easy_install-3.6 | 11 + .venv/bin/flask | 8 + .venv/bin/pip | 11 + .venv/bin/pip3 | 11 + .venv/bin/pip3.6 | 11 + .venv/bin/python | 1 + .venv/bin/python3 | 1 + .venv/bin/waitress-serve | 11 + .../Flask-2.0.2.dist-info/INSTALLER | 1 + .../Flask-2.0.2.dist-info/LICENSE.rst | 28 + .../Flask-2.0.2.dist-info/METADATA | 125 + .../Flask-2.0.2.dist-info/RECORD | 52 + .../Flask-2.0.2.dist-info/REQUESTED | 0 .../site-packages/Flask-2.0.2.dist-info/WHEEL | 5 + .../Flask-2.0.2.dist-info/entry_points.txt | 3 + .../Flask-2.0.2.dist-info/top_level.txt | 1 + .../Jinja2-3.0.3.dist-info/INSTALLER | 1 + .../Jinja2-3.0.3.dist-info/LICENSE.rst | 28 + .../Jinja2-3.0.3.dist-info/METADATA | 113 + 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+++ b/.venv/bin/activate @@ -0,0 +1,76 @@ +# This file must be used with "source bin/activate" *from bash* +# you cannot run it directly + +deactivate () { + # reset old environment variables + if [ -n "${_OLD_VIRTUAL_PATH:-}" ] ; then + PATH="${_OLD_VIRTUAL_PATH:-}" + export PATH + unset _OLD_VIRTUAL_PATH + fi + if [ -n "${_OLD_VIRTUAL_PYTHONHOME:-}" ] ; then + PYTHONHOME="${_OLD_VIRTUAL_PYTHONHOME:-}" + export PYTHONHOME + unset _OLD_VIRTUAL_PYTHONHOME + fi + + # This should detect bash and zsh, which have a hash command that must + # be called to get it to forget past commands. Without forgetting + # past commands the $PATH changes we made may not be respected + if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then + hash -r + fi + + if [ -n "${_OLD_VIRTUAL_PS1:-}" ] ; then + PS1="${_OLD_VIRTUAL_PS1:-}" + export PS1 + unset _OLD_VIRTUAL_PS1 + fi + + unset VIRTUAL_ENV + if [ ! "$1" = "nondestructive" ] ; then + # Self destruct! + unset -f deactivate + fi +} + +# unset irrelevant variables +deactivate nondestructive + +VIRTUAL_ENV="/home/brochwer/github/devfile-sample-python-basic/.venv" +export VIRTUAL_ENV + +_OLD_VIRTUAL_PATH="$PATH" +PATH="$VIRTUAL_ENV/bin:$PATH" +export PATH + +# unset PYTHONHOME if set +# this will fail if PYTHONHOME is set to the empty string (which is bad anyway) +# could use `if (set -u; : $PYTHONHOME) ;` in bash +if [ -n "${PYTHONHOME:-}" ] ; then + _OLD_VIRTUAL_PYTHONHOME="${PYTHONHOME:-}" + unset PYTHONHOME +fi + +if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT:-}" ] ; then + _OLD_VIRTUAL_PS1="${PS1:-}" + if [ "x(.venv) " != x ] ; then + PS1="(.venv) ${PS1:-}" + else + if [ "`basename \"$VIRTUAL_ENV\"`" = "__" ] ; then + # special case for Aspen magic directories + # see http://www.zetadev.com/software/aspen/ + PS1="[`basename \`dirname \"$VIRTUAL_ENV\"\``] $PS1" + else + PS1="(`basename \"$VIRTUAL_ENV\"`)$PS1" + fi + fi + export PS1 +fi + +# This should detect bash and zsh, which have a hash command that must +# be called to get it to forget past commands. Without forgetting +# past commands the $PATH changes we made may not be respected +if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then + hash -r +fi diff --git a/.venv/bin/activate.csh b/.venv/bin/activate.csh new file mode 100644 index 0000000..df66ad3 --- /dev/null +++ b/.venv/bin/activate.csh @@ -0,0 +1,37 @@ +# This file must be used with "source bin/activate.csh" *from csh*. +# You cannot run it directly. +# Created by Davide Di Blasi . +# Ported to Python 3.3 venv by Andrew Svetlov + +alias deactivate 'test $?_OLD_VIRTUAL_PATH != 0 && setenv PATH "$_OLD_VIRTUAL_PATH" && unset _OLD_VIRTUAL_PATH; rehash; test $?_OLD_VIRTUAL_PROMPT != 0 && set prompt="$_OLD_VIRTUAL_PROMPT" && unset _OLD_VIRTUAL_PROMPT; unsetenv VIRTUAL_ENV; test "\!:*" != "nondestructive" && unalias deactivate' + +# Unset irrelevant variables. +deactivate nondestructive + +setenv VIRTUAL_ENV "/home/brochwer/github/devfile-sample-python-basic/.venv" + +set _OLD_VIRTUAL_PATH="$PATH" +setenv PATH "$VIRTUAL_ENV/bin:$PATH" + + +set _OLD_VIRTUAL_PROMPT="$prompt" + +if (! "$?VIRTUAL_ENV_DISABLE_PROMPT") then + if (".venv" != "") then + set env_name = ".venv" + else + if (`basename "VIRTUAL_ENV"` == "__") then + # special case for Aspen magic directories + # see http://www.zetadev.com/software/aspen/ + set env_name = `basename \`dirname "$VIRTUAL_ENV"\`` + else + set env_name = `basename "$VIRTUAL_ENV"` + endif + endif + set prompt = "[$env_name] $prompt" + unset env_name +endif + +alias pydoc python -m pydoc + +rehash diff --git a/.venv/bin/activate.fish b/.venv/bin/activate.fish new file mode 100644 index 0000000..d44b7d6 --- /dev/null +++ b/.venv/bin/activate.fish @@ -0,0 +1,75 @@ +# This file must be used with ". bin/activate.fish" *from fish* (http://fishshell.org) +# you cannot run it directly + +function deactivate -d "Exit virtualenv and return to normal shell environment" + # reset old environment variables + if test -n "$_OLD_VIRTUAL_PATH" + set -gx PATH $_OLD_VIRTUAL_PATH + set -e _OLD_VIRTUAL_PATH + end + if test -n "$_OLD_VIRTUAL_PYTHONHOME" + set -gx PYTHONHOME $_OLD_VIRTUAL_PYTHONHOME + set -e _OLD_VIRTUAL_PYTHONHOME + end + + if test -n "$_OLD_FISH_PROMPT_OVERRIDE" + functions -e fish_prompt + set -e _OLD_FISH_PROMPT_OVERRIDE + functions -c _old_fish_prompt fish_prompt + functions -e _old_fish_prompt + end + + set -e VIRTUAL_ENV + if test "$argv[1]" != "nondestructive" + # Self destruct! + functions -e deactivate + end +end + +# unset irrelevant variables +deactivate nondestructive + +set -gx VIRTUAL_ENV "/home/brochwer/github/devfile-sample-python-basic/.venv" + +set -gx _OLD_VIRTUAL_PATH $PATH +set -gx PATH "$VIRTUAL_ENV/bin" $PATH + +# unset PYTHONHOME if set +if set -q PYTHONHOME + set -gx _OLD_VIRTUAL_PYTHONHOME $PYTHONHOME + set -e PYTHONHOME +end + +if test -z "$VIRTUAL_ENV_DISABLE_PROMPT" + # fish uses a function instead of an env var to generate the prompt. + + # save the current fish_prompt function as the function _old_fish_prompt + functions -c fish_prompt _old_fish_prompt + + # with the original prompt function renamed, we can override with our own. + function fish_prompt + # Save the return status of the last command + set -l old_status $status + + # Prompt override? + if test -n "(.venv) " + printf "%s%s" "(.venv) " (set_color normal) + else + # ...Otherwise, prepend env + set -l _checkbase (basename "$VIRTUAL_ENV") + if test $_checkbase = "__" + # special case for Aspen magic directories + # see http://www.zetadev.com/software/aspen/ + printf "%s[%s]%s " (set_color -b blue white) (basename (dirname "$VIRTUAL_ENV")) (set_color normal) + else + printf "%s(%s)%s" (set_color -b blue white) (basename "$VIRTUAL_ENV") (set_color normal) + end + end + + # Restore the return status of the previous command. + echo "exit $old_status" | . + _old_fish_prompt + end + + set -gx _OLD_FISH_PROMPT_OVERRIDE "$VIRTUAL_ENV" +end diff --git a/.venv/bin/easy_install b/.venv/bin/easy_install new file mode 100755 index 0000000..6d3083a --- /dev/null +++ b/.venv/bin/easy_install @@ -0,0 +1,11 @@ +#!/home/brochwer/github/devfile-sample-python-basic/.venv/bin/python3 + +# -*- coding: utf-8 -*- +import re +import sys + +from setuptools.command.easy_install import main + +if __name__ == '__main__': + sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0]) + sys.exit(main()) diff --git a/.venv/bin/easy_install-3.6 b/.venv/bin/easy_install-3.6 new file mode 100755 index 0000000..6d3083a --- /dev/null +++ b/.venv/bin/easy_install-3.6 @@ -0,0 +1,11 @@ +#!/home/brochwer/github/devfile-sample-python-basic/.venv/bin/python3 + +# -*- coding: utf-8 -*- +import re +import sys + +from setuptools.command.easy_install import main + +if __name__ == '__main__': + sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0]) + sys.exit(main()) diff --git a/.venv/bin/flask b/.venv/bin/flask new file mode 100755 index 0000000..b63adeb --- /dev/null +++ b/.venv/bin/flask @@ -0,0 +1,8 @@ +#!/home/brochwer/github/devfile-sample-python-basic/.venv/bin/python3 +# -*- coding: utf-8 -*- +import re +import sys +from flask.cli import main +if __name__ == '__main__': + sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0]) + sys.exit(main()) diff --git a/.venv/bin/pip b/.venv/bin/pip new file mode 100755 index 0000000..79c1b92 --- /dev/null +++ b/.venv/bin/pip @@ -0,0 +1,11 @@ +#!/home/brochwer/github/devfile-sample-python-basic/.venv/bin/python3 + +# -*- coding: utf-8 -*- +import re +import sys + +from pip._internal.cli.main import main + +if __name__ == '__main__': + sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0]) + sys.exit(main()) diff --git a/.venv/bin/pip3 b/.venv/bin/pip3 new file mode 100755 index 0000000..79c1b92 --- /dev/null +++ b/.venv/bin/pip3 @@ -0,0 +1,11 @@ +#!/home/brochwer/github/devfile-sample-python-basic/.venv/bin/python3 + +# -*- coding: utf-8 -*- +import re +import sys + +from pip._internal.cli.main import main + +if __name__ == '__main__': + sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0]) + sys.exit(main()) diff --git a/.venv/bin/pip3.6 b/.venv/bin/pip3.6 new file mode 100755 index 0000000..79c1b92 --- /dev/null +++ b/.venv/bin/pip3.6 @@ -0,0 +1,11 @@ +#!/home/brochwer/github/devfile-sample-python-basic/.venv/bin/python3 + +# -*- coding: utf-8 -*- +import re +import sys + +from pip._internal.cli.main import main + +if __name__ == '__main__': + sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0]) + sys.exit(main()) diff --git a/.venv/bin/python b/.venv/bin/python new file mode 120000 index 0000000..b8a0adb --- /dev/null +++ b/.venv/bin/python @@ -0,0 +1 @@ +python3 \ No newline at end of file diff --git a/.venv/bin/python3 b/.venv/bin/python3 new file mode 120000 index 0000000..ae65fda --- /dev/null +++ b/.venv/bin/python3 @@ -0,0 +1 @@ +/usr/bin/python3 \ No newline at end of file diff --git a/.venv/bin/waitress-serve b/.venv/bin/waitress-serve new file mode 100755 index 0000000..83422df --- /dev/null +++ b/.venv/bin/waitress-serve @@ -0,0 +1,11 @@ +#!/home/brochwer/github/devfile-sample-python-basic/.venv/bin/python + +# -*- coding: utf-8 -*- +import re +import sys + +from waitress.runner import run + +if __name__ == '__main__': + sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0]) + sys.exit(run()) diff --git a/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/INSTALLER b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/INSTALLER new file mode 100644 index 0000000..a1b589e --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/INSTALLER @@ -0,0 +1 @@ +pip diff --git a/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/LICENSE.rst b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/LICENSE.rst new file mode 100644 index 0000000..9d227a0 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/LICENSE.rst @@ -0,0 +1,28 @@ +Copyright 2010 Pallets + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + +1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + +2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + +3. Neither the name of the copyright holder nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A +PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED +TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/METADATA b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/METADATA new file mode 100644 index 0000000..aaf27ca --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/METADATA @@ -0,0 +1,125 @@ +Metadata-Version: 2.1 +Name: Flask +Version: 2.0.2 +Summary: A simple framework for building complex web applications. +Home-page: https://palletsprojects.com/p/flask +Author: Armin Ronacher +Author-email: armin.ronacher@active-4.com +Maintainer: Pallets +Maintainer-email: contact@palletsprojects.com +License: BSD-3-Clause +Project-URL: Donate, https://palletsprojects.com/donate +Project-URL: Documentation, https://flask.palletsprojects.com/ +Project-URL: Changes, https://flask.palletsprojects.com/changes/ +Project-URL: Source Code, https://github.com/pallets/flask/ +Project-URL: Issue Tracker, https://github.com/pallets/flask/issues/ +Project-URL: Twitter, https://twitter.com/PalletsTeam +Project-URL: Chat, https://discord.gg/pallets +Platform: UNKNOWN +Classifier: Development Status :: 5 - Production/Stable +Classifier: Environment :: Web Environment +Classifier: Framework :: Flask +Classifier: Intended Audience :: Developers +Classifier: License :: OSI Approved :: BSD License +Classifier: Operating System :: OS Independent +Classifier: Programming Language :: Python +Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content +Classifier: Topic :: Internet :: WWW/HTTP :: WSGI +Classifier: Topic :: Internet :: WWW/HTTP :: WSGI :: Application +Classifier: Topic :: Software Development :: Libraries :: Application Frameworks +Requires-Python: >=3.6 +Description-Content-Type: text/x-rst +License-File: LICENSE.rst +Requires-Dist: Werkzeug (>=2.0) +Requires-Dist: Jinja2 (>=3.0) +Requires-Dist: itsdangerous (>=2.0) +Requires-Dist: click (>=7.1.2) +Provides-Extra: async +Requires-Dist: asgiref (>=3.2) ; extra == 'async' +Provides-Extra: dotenv +Requires-Dist: python-dotenv ; extra == 'dotenv' + +Flask +===== + +Flask is a lightweight `WSGI`_ web application framework. It is designed +to make getting started quick and easy, with the ability to scale up to +complex applications. It began as a simple wrapper around `Werkzeug`_ +and `Jinja`_ and has become one of the most popular Python web +application frameworks. + +Flask offers suggestions, but doesn't enforce any dependencies or +project layout. It is up to the developer to choose the tools and +libraries they want to use. There are many extensions provided by the +community that make adding new functionality easy. + +.. _WSGI: https://wsgi.readthedocs.io/ +.. _Werkzeug: https://werkzeug.palletsprojects.com/ +.. _Jinja: https://jinja.palletsprojects.com/ + + +Installing +---------- + +Install and update using `pip`_: + +.. code-block:: text + + $ pip install -U Flask + +.. _pip: https://pip.pypa.io/en/stable/getting-started/ + + +A Simple Example +---------------- + +.. code-block:: python + + # save this as app.py + from flask import Flask + + app = Flask(__name__) + + @app.route("/") + def hello(): + return "Hello, World!" + +.. code-block:: text + + $ flask run + * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit) + + +Contributing +------------ + +For guidance on setting up a development environment and how to make a +contribution to Flask, see the `contributing guidelines`_. + +.. _contributing guidelines: https://github.com/pallets/flask/blob/main/CONTRIBUTING.rst + + +Donate +------ + +The Pallets organization develops and supports Flask and the libraries +it uses. In order to grow the community of contributors and users, and +allow the maintainers to devote more time to the projects, `please +donate today`_. + +.. _please donate today: https://palletsprojects.com/donate + + +Links +----- + +- Documentation: https://flask.palletsprojects.com/ +- Changes: https://flask.palletsprojects.com/changes/ +- PyPI Releases: https://pypi.org/project/Flask/ +- Source Code: https://github.com/pallets/flask/ +- Issue Tracker: https://github.com/pallets/flask/issues/ +- Website: https://palletsprojects.com/p/flask/ +- Twitter: https://twitter.com/PalletsTeam +- Chat: https://discord.gg/pallets + + diff --git a/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/RECORD b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/RECORD new file mode 100644 index 0000000..f5544bc --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/RECORD @@ -0,0 +1,52 @@ +../../../bin/flask,sha256=wCuzOWfT5kwf4LVrPxYRdDe5wcO_SuLlTPUuvpaZcDo,259 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+flask/testing.py,sha256=OsHT-2B70abWH3ulY9IbhLchXIeyj3L-cfcDa88wv5E,10281 +flask/typing.py,sha256=hXEVcXoH-QEabmy1F11pYaQ2SonlkMAwfjBAnqj2x18,1982 +flask/views.py,sha256=nhq31TRB5Z-z2mjFGZACaaB2Et5XPCmWhWxJxOvLWww,5948 +flask/wrappers.py,sha256=VndbHPRBSUUOejmd2Y3ydkoCVUtsS2OJIdJEVIkBVD8,5604 diff --git a/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/REQUESTED b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/REQUESTED new file mode 100644 index 0000000..e69de29 diff --git a/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/WHEEL b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/WHEEL new file mode 100644 index 0000000..5bad85f --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/WHEEL @@ -0,0 +1,5 @@ +Wheel-Version: 1.0 +Generator: bdist_wheel (0.37.0) +Root-Is-Purelib: true +Tag: py3-none-any + diff --git a/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/entry_points.txt b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/entry_points.txt new file mode 100644 index 0000000..1eb0252 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/entry_points.txt @@ -0,0 +1,3 @@ +[console_scripts] +flask = flask.cli:main + diff --git a/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/top_level.txt b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/top_level.txt new file mode 100644 index 0000000..7e10602 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Flask-2.0.2.dist-info/top_level.txt @@ -0,0 +1 @@ +flask diff --git a/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/INSTALLER b/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/INSTALLER new file mode 100644 index 0000000..a1b589e --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/INSTALLER @@ -0,0 +1 @@ +pip diff --git a/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/LICENSE.rst b/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/LICENSE.rst new file mode 100644 index 0000000..c37cae4 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/LICENSE.rst @@ -0,0 +1,28 @@ +Copyright 2007 Pallets + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + +1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + +2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + +3. Neither the name of the copyright holder nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A +PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED +TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/METADATA b/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/METADATA new file mode 100644 index 0000000..3b9355a --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/METADATA @@ -0,0 +1,113 @@ +Metadata-Version: 2.1 +Name: Jinja2 +Version: 3.0.3 +Summary: A very fast and expressive template engine. +Home-page: https://palletsprojects.com/p/jinja/ +Author: Armin Ronacher +Author-email: armin.ronacher@active-4.com +Maintainer: Pallets +Maintainer-email: contact@palletsprojects.com +License: BSD-3-Clause +Project-URL: Donate, https://palletsprojects.com/donate +Project-URL: Documentation, https://jinja.palletsprojects.com/ +Project-URL: Changes, https://jinja.palletsprojects.com/changes/ +Project-URL: Source Code, https://github.com/pallets/jinja/ +Project-URL: Issue Tracker, https://github.com/pallets/jinja/issues/ +Project-URL: Twitter, https://twitter.com/PalletsTeam +Project-URL: Chat, https://discord.gg/pallets +Platform: UNKNOWN +Classifier: Development Status :: 5 - Production/Stable +Classifier: Environment :: Web Environment +Classifier: Intended Audience :: Developers +Classifier: License :: OSI Approved :: BSD License +Classifier: Operating System :: OS Independent +Classifier: Programming Language :: Python +Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content +Classifier: Topic :: Text Processing :: Markup :: HTML +Requires-Python: >=3.6 +Description-Content-Type: text/x-rst +License-File: LICENSE.rst +Requires-Dist: MarkupSafe (>=2.0) +Provides-Extra: i18n +Requires-Dist: Babel (>=2.7) ; extra == 'i18n' + +Jinja +===== + +Jinja is a fast, expressive, extensible templating engine. Special +placeholders in the template allow writing code similar to Python +syntax. Then the template is passed data to render the final document. + +It includes: + +- Template inheritance and inclusion. +- Define and import macros within templates. +- HTML templates can use autoescaping to prevent XSS from untrusted + user input. +- A sandboxed environment can safely render untrusted templates. +- AsyncIO support for generating templates and calling async + functions. +- I18N support with Babel. +- Templates are compiled to optimized Python code just-in-time and + cached, or can be compiled ahead-of-time. +- Exceptions point to the correct line in templates to make debugging + easier. +- Extensible filters, tests, functions, and even syntax. + +Jinja's philosophy is that while application logic belongs in Python if +possible, it shouldn't make the template designer's job difficult by +restricting functionality too much. + + +Installing +---------- + +Install and update using `pip`_: + +.. code-block:: text + + $ pip install -U Jinja2 + +.. _pip: https://pip.pypa.io/en/stable/getting-started/ + + +In A Nutshell +------------- + +.. code-block:: jinja + + {% extends "base.html" %} + {% block title %}Members{% endblock %} + {% block content %} + + {% endblock %} + + +Donate +------ + +The Pallets organization develops and supports Jinja and other popular +packages. In order to grow the community of contributors and users, and +allow the maintainers to devote more time to the projects, `please +donate today`_. + +.. _please donate today: https://palletsprojects.com/donate + + +Links +----- + +- Documentation: https://jinja.palletsprojects.com/ +- Changes: https://jinja.palletsprojects.com/changes/ +- PyPI Releases: https://pypi.org/project/Jinja2/ +- Source Code: https://github.com/pallets/jinja/ +- Issue Tracker: https://github.com/pallets/jinja/issues/ +- Website: https://palletsprojects.com/p/jinja/ +- Twitter: https://twitter.com/PalletsTeam +- Chat: https://discord.gg/pallets + + diff --git a/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/RECORD b/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/RECORD new file mode 100644 index 0000000..fe2a7a5 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/RECORD @@ -0,0 +1,58 @@ 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b/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/WHEEL @@ -0,0 +1,5 @@ +Wheel-Version: 1.0 +Generator: bdist_wheel (0.37.0) +Root-Is-Purelib: true +Tag: py3-none-any + diff --git a/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/entry_points.txt b/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/entry_points.txt new file mode 100644 index 0000000..3619483 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/entry_points.txt @@ -0,0 +1,3 @@ +[babel.extractors] +jinja2 = jinja2.ext:babel_extract [i18n] + diff --git a/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/top_level.txt b/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/top_level.txt new file mode 100644 index 0000000..7f7afbf --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Jinja2-3.0.3.dist-info/top_level.txt @@ -0,0 +1 @@ +jinja2 diff --git a/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/INSTALLER b/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/INSTALLER new file mode 100644 index 0000000..a1b589e --- /dev/null +++ b/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/INSTALLER @@ -0,0 +1 @@ +pip diff --git a/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/LICENSE.rst b/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/LICENSE.rst new file mode 100644 index 0000000..9d227a0 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/LICENSE.rst @@ -0,0 +1,28 @@ +Copyright 2010 Pallets + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + +1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + +2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + +3. Neither the name of the copyright holder nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A +PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED +TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/METADATA b/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/METADATA new file mode 100644 index 0000000..e87ebb9 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/METADATA @@ -0,0 +1,101 @@ +Metadata-Version: 2.1 +Name: MarkupSafe +Version: 2.0.1 +Summary: Safely add untrusted strings to HTML/XML markup. +Home-page: https://palletsprojects.com/p/markupsafe/ +Author: Armin Ronacher +Author-email: armin.ronacher@active-4.com +Maintainer: Pallets +Maintainer-email: contact@palletsprojects.com +License: BSD-3-Clause +Project-URL: Donate, https://palletsprojects.com/donate +Project-URL: Documentation, https://markupsafe.palletsprojects.com/ +Project-URL: Changes, https://markupsafe.palletsprojects.com/changes/ +Project-URL: Source Code, https://github.com/pallets/markupsafe/ +Project-URL: Issue Tracker, https://github.com/pallets/markupsafe/issues/ +Project-URL: Twitter, https://twitter.com/PalletsTeam +Project-URL: Chat, https://discord.gg/pallets +Platform: UNKNOWN +Classifier: Development Status :: 5 - Production/Stable +Classifier: Environment :: Web Environment +Classifier: Intended Audience :: Developers +Classifier: License :: OSI Approved :: BSD License +Classifier: Operating System :: OS Independent +Classifier: Programming Language :: Python +Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content +Classifier: Topic :: Text Processing :: Markup :: HTML +Requires-Python: >=3.6 +Description-Content-Type: text/x-rst +License-File: LICENSE.rst + +MarkupSafe +========== + +MarkupSafe implements a text object that escapes characters so it is +safe to use in HTML and XML. Characters that have special meanings are +replaced so that they display as the actual characters. This mitigates +injection attacks, meaning untrusted user input can safely be displayed +on a page. + + +Installing +---------- + +Install and update using `pip`_: + +.. code-block:: text + + pip install -U MarkupSafe + +.. _pip: https://pip.pypa.io/en/stable/quickstart/ + + +Examples +-------- + +.. code-block:: pycon + + >>> from markupsafe import Markup, escape + + >>> # escape replaces special characters and wraps in Markup + >>> escape("") + Markup('<script>alert(document.cookie);</script>') + + >>> # wrap in Markup to mark text "safe" and prevent escaping + >>> Markup("Hello") + Markup('hello') + + >>> escape(Markup("Hello")) + Markup('hello') + + >>> # Markup is a str subclass + >>> # methods and operators escape their arguments + >>> template = Markup("Hello {name}") + >>> template.format(name='"World"') + Markup('Hello "World"') + + +Donate +------ + +The Pallets organization develops and supports MarkupSafe and other +popular packages. In order to grow the community of contributors and +users, and allow the maintainers to devote more time to the projects, +`please donate today`_. + +.. _please donate today: https://palletsprojects.com/donate + + +Links +----- + +- Documentation: https://markupsafe.palletsprojects.com/ +- Changes: https://markupsafe.palletsprojects.com/changes/ +- PyPI Releases: https://pypi.org/project/MarkupSafe/ +- Source Code: https://github.com/pallets/markupsafe/ +- Issue Tracker: https://github.com/pallets/markupsafe/issues/ +- Website: https://palletsprojects.com/p/markupsafe/ +- Twitter: https://twitter.com/PalletsTeam +- Chat: https://discord.gg/pallets + + diff --git a/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/RECORD b/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/RECORD new file mode 100644 index 0000000..a4fc7b4 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/RECORD @@ -0,0 +1,14 @@ +MarkupSafe-2.0.1.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4 +MarkupSafe-2.0.1.dist-info/LICENSE.rst,sha256=SJqOEQhQntmKN7uYPhHg9-HTHwvY-Zp5yESOf_N9B-o,1475 +MarkupSafe-2.0.1.dist-info/METADATA,sha256=lknelt-VPHWai5EJcvZpATGKVbXkg74h7CQuPwDS71U,3237 +MarkupSafe-2.0.1.dist-info/RECORD,, +MarkupSafe-2.0.1.dist-info/WHEEL,sha256=Fqh7DnJbpv2r236LaMb8-xDJTAK8YDFtDn9konrfeVo,221 +MarkupSafe-2.0.1.dist-info/top_level.txt,sha256=qy0Plje5IJuvsCBjejJyhDCjEAdcDLK_2agVcex8Z6U,11 +markupsafe/__init__.py,sha256=9Tez4UIlI7J6_sQcUFK1dKniT_b_8YefpGIyYJ3Sr2Q,8923 +markupsafe/__pycache__/__init__.cpython-36.pyc,, +markupsafe/__pycache__/_native.cpython-36.pyc,, +markupsafe/_native.py,sha256=GTKEV-bWgZuSjklhMHOYRHU9k0DMewTf5mVEZfkbuns,1986 +markupsafe/_speedups.c,sha256=CDDtwaV21D2nYtypnMQzxvvpZpcTvIs8OZ6KDa1g4t0,7400 +markupsafe/_speedups.cpython-36m-x86_64-linux-gnu.so,sha256=Sxz22cri9KThgORcwPLIaWduxE9TuYmKKARBzdedPd8,51904 +markupsafe/_speedups.pyi,sha256=vfMCsOgbAXRNLUXkyuyonG8uEWKYU4PDqNuMaDELAYw,229 +markupsafe/py.typed,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0 diff --git a/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/WHEEL b/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/WHEEL new file mode 100644 index 0000000..a66ca36 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/WHEEL @@ -0,0 +1,8 @@ +Wheel-Version: 1.0 +Generator: bdist_wheel (0.36.2) +Root-Is-Purelib: false +Tag: cp36-cp36m-manylinux_2_5_x86_64 +Tag: cp36-cp36m-manylinux1_x86_64 +Tag: cp36-cp36m-manylinux_2_12_x86_64 +Tag: cp36-cp36m-manylinux2010_x86_64 + diff --git a/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/top_level.txt b/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/top_level.txt new file mode 100644 index 0000000..75bf729 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/MarkupSafe-2.0.1.dist-info/top_level.txt @@ -0,0 +1 @@ +markupsafe diff --git a/.venv/lib/python3.6/site-packages/Werkzeug-2.0.2.dist-info/INSTALLER b/.venv/lib/python3.6/site-packages/Werkzeug-2.0.2.dist-info/INSTALLER new file mode 100644 index 0000000..a1b589e --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Werkzeug-2.0.2.dist-info/INSTALLER @@ -0,0 +1 @@ +pip diff --git a/.venv/lib/python3.6/site-packages/Werkzeug-2.0.2.dist-info/LICENSE.rst b/.venv/lib/python3.6/site-packages/Werkzeug-2.0.2.dist-info/LICENSE.rst new file mode 100644 index 0000000..c37cae4 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Werkzeug-2.0.2.dist-info/LICENSE.rst @@ -0,0 +1,28 @@ +Copyright 2007 Pallets + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + +1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + +2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + +3. Neither the name of the copyright holder nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A +PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED +TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/.venv/lib/python3.6/site-packages/Werkzeug-2.0.2.dist-info/METADATA b/.venv/lib/python3.6/site-packages/Werkzeug-2.0.2.dist-info/METADATA new file mode 100644 index 0000000..b58b9bd --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Werkzeug-2.0.2.dist-info/METADATA @@ -0,0 +1,129 @@ +Metadata-Version: 2.1 +Name: Werkzeug +Version: 2.0.2 +Summary: The comprehensive WSGI web application library. +Home-page: https://palletsprojects.com/p/werkzeug/ +Author: Armin Ronacher +Author-email: armin.ronacher@active-4.com +Maintainer: Pallets +Maintainer-email: contact@palletsprojects.com +License: BSD-3-Clause +Project-URL: Donate, https://palletsprojects.com/donate +Project-URL: Documentation, https://werkzeug.palletsprojects.com/ +Project-URL: Changes, https://werkzeug.palletsprojects.com/changes/ +Project-URL: Source Code, https://github.com/pallets/werkzeug/ +Project-URL: Issue Tracker, https://github.com/pallets/werkzeug/issues/ +Project-URL: Twitter, https://twitter.com/PalletsTeam +Project-URL: Chat, https://discord.gg/pallets +Platform: UNKNOWN +Classifier: Development Status :: 5 - Production/Stable +Classifier: Environment :: Web Environment +Classifier: Intended Audience :: Developers +Classifier: License :: OSI Approved :: BSD License +Classifier: Operating System :: OS Independent +Classifier: Programming Language :: Python +Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content +Classifier: Topic :: Internet :: WWW/HTTP :: WSGI +Classifier: Topic :: Internet :: WWW/HTTP :: WSGI :: Application +Classifier: Topic :: Internet :: WWW/HTTP :: WSGI :: Middleware +Classifier: Topic :: Software Development :: Libraries :: Application Frameworks +Requires-Python: >=3.6 +Description-Content-Type: text/x-rst +License-File: LICENSE.rst +Requires-Dist: dataclasses ; python_version < "3.7" +Provides-Extra: watchdog +Requires-Dist: watchdog ; extra == 'watchdog' + +Werkzeug +======== + +*werkzeug* German noun: "tool". Etymology: *werk* ("work"), *zeug* ("stuff") + +Werkzeug is a comprehensive `WSGI`_ web application library. It began as +a simple collection of various utilities for WSGI applications and has +become one of the most advanced WSGI utility libraries. + +It includes: + +- An interactive debugger that allows inspecting stack traces and + source code in the browser with an interactive interpreter for any + frame in the stack. +- A full-featured request object with objects to interact with + headers, query args, form data, files, and cookies. +- A response object that can wrap other WSGI applications and handle + streaming data. +- A routing system for matching URLs to endpoints and generating URLs + for endpoints, with an extensible system for capturing variables + from URLs. +- HTTP utilities to handle entity tags, cache control, dates, user + agents, cookies, files, and more. +- A threaded WSGI server for use while developing applications + locally. +- A test client for simulating HTTP requests during testing without + requiring running a server. + +Werkzeug doesn't enforce any dependencies. It is up to the developer to +choose a template engine, database adapter, and even how to handle +requests. It can be used to build all sorts of end user applications +such as blogs, wikis, or bulletin boards. + +`Flask`_ wraps Werkzeug, using it to handle the details of WSGI while +providing more structure and patterns for defining powerful +applications. + +.. _WSGI: https://wsgi.readthedocs.io/en/latest/ +.. _Flask: https://www.palletsprojects.com/p/flask/ + + +Installing +---------- + +Install and update using `pip`_: + +.. code-block:: text + + pip install -U Werkzeug + +.. _pip: https://pip.pypa.io/en/stable/getting-started/ + + +A Simple Example +---------------- + +.. code-block:: python + + from werkzeug.wrappers import Request, Response + + @Request.application + def application(request): + return Response('Hello, World!') + + if __name__ == '__main__': + from werkzeug.serving import run_simple + run_simple('localhost', 4000, application) + + +Donate +------ + +The Pallets organization develops and supports Werkzeug and other +popular packages. In order to grow the community of contributors and +users, and allow the maintainers to devote more time to the projects, +`please donate today`_. + +.. _please donate today: https://palletsprojects.com/donate + + +Links +----- + +- Documentation: https://werkzeug.palletsprojects.com/ +- Changes: https://werkzeug.palletsprojects.com/changes/ +- PyPI Releases: https://pypi.org/project/Werkzeug/ +- Source Code: https://github.com/pallets/werkzeug/ +- Issue Tracker: https://github.com/pallets/werkzeug/issues/ +- Website: https://palletsprojects.com/p/werkzeug/ +- Twitter: https://twitter.com/PalletsTeam +- Chat: https://discord.gg/pallets + + diff --git a/.venv/lib/python3.6/site-packages/Werkzeug-2.0.2.dist-info/RECORD b/.venv/lib/python3.6/site-packages/Werkzeug-2.0.2.dist-info/RECORD new file mode 100644 index 0000000..ab14636 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/Werkzeug-2.0.2.dist-info/RECORD @@ -0,0 +1,111 @@ 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b/.venv/lib/python3.6/site-packages/click-8.0.3.dist-info/LICENSE.rst @@ -0,0 +1,28 @@ +Copyright 2014 Pallets + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + +1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + +2. Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + +3. Neither the name of the copyright holder nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A +PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED +TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/.venv/lib/python3.6/site-packages/click-8.0.3.dist-info/METADATA b/.venv/lib/python3.6/site-packages/click-8.0.3.dist-info/METADATA new file mode 100644 index 0000000..2c8da01 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click-8.0.3.dist-info/METADATA @@ -0,0 +1,111 @@ +Metadata-Version: 2.1 +Name: click +Version: 8.0.3 +Summary: Composable command line interface toolkit +Home-page: https://palletsprojects.com/p/click/ +Author: Armin Ronacher +Author-email: armin.ronacher@active-4.com +Maintainer: Pallets +Maintainer-email: contact@palletsprojects.com +License: BSD-3-Clause +Project-URL: Donate, https://palletsprojects.com/donate +Project-URL: Documentation, https://click.palletsprojects.com/ +Project-URL: Changes, https://click.palletsprojects.com/changes/ +Project-URL: Source Code, https://github.com/pallets/click/ +Project-URL: Issue Tracker, https://github.com/pallets/click/issues/ +Project-URL: Twitter, https://twitter.com/PalletsTeam +Project-URL: Chat, https://discord.gg/pallets +Platform: UNKNOWN +Classifier: Development Status :: 5 - Production/Stable +Classifier: Intended Audience :: Developers +Classifier: License :: OSI Approved :: BSD License +Classifier: Operating System :: OS Independent +Classifier: Programming Language :: Python +Requires-Python: >=3.6 +Description-Content-Type: text/x-rst +License-File: LICENSE.rst +Requires-Dist: colorama ; platform_system == "Windows" +Requires-Dist: importlib-metadata ; python_version < "3.8" + +\$ click\_ +========== + +Click is a Python package for creating beautiful command line interfaces +in a composable way with as little code as necessary. It's the "Command +Line Interface Creation Kit". It's highly configurable but comes with +sensible defaults out of the box. + +It aims to make the process of writing command line tools quick and fun +while also preventing any frustration caused by the inability to +implement an intended CLI API. + +Click in three points: + +- Arbitrary nesting of commands +- Automatic help page generation +- Supports lazy loading of subcommands at runtime + + +Installing +---------- + +Install and update using `pip`_: + +.. code-block:: text + + $ pip install -U click + +.. _pip: https://pip.pypa.io/en/stable/getting-started/ + + +A Simple Example +---------------- + +.. code-block:: python + + import click + + @click.command() + @click.option("--count", default=1, help="Number of greetings.") + @click.option("--name", prompt="Your name", help="The person to greet.") + def hello(count, name): + """Simple program that greets NAME for a total of COUNT times.""" + for _ in range(count): + click.echo(f"Hello, {name}!") + + if __name__ == '__main__': + hello() + +.. code-block:: text + + $ python hello.py --count=3 + Your name: Click + Hello, Click! + Hello, Click! + Hello, Click! + + +Donate +------ + +The Pallets organization develops and supports Click and other popular +packages. In order to grow the community of contributors and users, and +allow the maintainers to devote more time to the projects, `please +donate today`_. + +.. _please donate today: https://palletsprojects.com/donate + + +Links +----- + +- Documentation: https://click.palletsprojects.com/ +- Changes: https://click.palletsprojects.com/changes/ +- PyPI Releases: https://pypi.org/project/click/ +- Source Code: https://github.com/pallets/click +- Issue Tracker: https://github.com/pallets/click/issues +- Website: https://palletsprojects.com/p/click +- Twitter: https://twitter.com/PalletsTeam +- Chat: https://discord.gg/pallets + + diff --git a/.venv/lib/python3.6/site-packages/click-8.0.3.dist-info/RECORD b/.venv/lib/python3.6/site-packages/click-8.0.3.dist-info/RECORD new file mode 100644 index 0000000..735aac1 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click-8.0.3.dist-info/RECORD @@ -0,0 +1,41 @@ +click-8.0.3.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4 +click-8.0.3.dist-info/LICENSE.rst,sha256=morRBqOU6FO_4h9C9OctWSgZoigF2ZG18ydQKSkrZY0,1475 +click-8.0.3.dist-info/METADATA,sha256=_0jCOf3DdGPvKUZUlBukeb1t6Pnxmm_OMGpaBoDthfc,3247 +click-8.0.3.dist-info/RECORD,, +click-8.0.3.dist-info/WHEEL,sha256=ewwEueio1C2XeHTvT17n8dZUJgOvyCWCt0WVNLClP9o,92 +click-8.0.3.dist-info/top_level.txt,sha256=J1ZQogalYS4pphY_lPECoNMfw0HzTSrZglC4Yfwo4xA,6 +click/__init__.py,sha256=YkIrDg7-0g5aBS6D2pDe58j3MOaFylHED2_8OXh2fnM,3243 +click/__pycache__/__init__.cpython-36.pyc,, +click/__pycache__/_compat.cpython-36.pyc,, +click/__pycache__/_termui_impl.cpython-36.pyc,, +click/__pycache__/_textwrap.cpython-36.pyc,, +click/__pycache__/_unicodefun.cpython-36.pyc,, +click/__pycache__/_winconsole.cpython-36.pyc,, +click/__pycache__/core.cpython-36.pyc,, +click/__pycache__/decorators.cpython-36.pyc,, +click/__pycache__/exceptions.cpython-36.pyc,, +click/__pycache__/formatting.cpython-36.pyc,, +click/__pycache__/globals.cpython-36.pyc,, +click/__pycache__/parser.cpython-36.pyc,, +click/__pycache__/shell_completion.cpython-36.pyc,, +click/__pycache__/termui.cpython-36.pyc,, +click/__pycache__/testing.cpython-36.pyc,, +click/__pycache__/types.cpython-36.pyc,, +click/__pycache__/utils.cpython-36.pyc,, +click/_compat.py,sha256=P15KQumAZC2F2MFe_JSRbvVOJcNosQfMDrdZq0ReCLM,18814 +click/_termui_impl.py,sha256=z78J5HF_RTsOBhjNLjoigaqRap3P2pWwEDDAjoZzgUg,23452 +click/_textwrap.py,sha256=10fQ64OcBUMuK7mFvh8363_uoOxPlRItZBmKzRJDgoY,1353 +click/_unicodefun.py,sha256=JKSh1oSwG_zbjAu4TBCa9tQde2P9FiYcf4MBfy5NdT8,3201 +click/_winconsole.py,sha256=5ju3jQkcZD0W27WEMGqmEP4y_crUVzPCqsX_FYb7BO0,7860 +click/core.py,sha256=k4PA2z0BT_dmed9I52Q2VLi8r6ekTMCtCQzw2y915Xs,111478 +click/decorators.py,sha256=sGkXJGmP7eLtjtmPl_Un2uBTlrhK8s2L22n-yBiDwTw,14864 +click/exceptions.py,sha256=7gDaLGuFZBeCNwY9ERMsF2-Z3R9Fvq09Zc6IZSKjseo,9167 +click/formatting.py,sha256=Frf0-5W33-loyY_i9qrwXR8-STnW3m5gvyxLVUdyxyk,9706 +click/globals.py,sha256=kGPzxq55Ug4dFUrgRV-5oHVPOPdLCUhmYolbrrVBo8g,1985 +click/parser.py,sha256=cAEt1uQR8gq3-S9ysqbVU-fdAZNvilxw4ReJ_T1OQMk,19044 +click/py.typed,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0 +click/shell_completion.py,sha256=_hPI12T9Ex-y5a3WunWnlH0Gca2_urzXFXkDnt7G6Ow,18001 +click/termui.py,sha256=Rp2gFE8x7j8sEIoFMOcPmuqxJQVWWTrwEzyC14-sPAw,29006 +click/testing.py,sha256=kLR5Qcny1OlgxaGB3gweTr0gQe1yVlmgQRn2esA2Fz4,16020 +click/types.py,sha256=VoNZnIlRBAtRRgzavdqVnyfzY5y4U4qzVGI1UvvX1ls,35391 +click/utils.py,sha256=avYwX-3l2KkdJNUo8NmncZSoAdEmniQ_M5sdsSYloJ4,18759 diff --git a/.venv/lib/python3.6/site-packages/click-8.0.3.dist-info/WHEEL b/.venv/lib/python3.6/site-packages/click-8.0.3.dist-info/WHEEL new file mode 100644 index 0000000..5bad85f --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click-8.0.3.dist-info/WHEEL @@ -0,0 +1,5 @@ +Wheel-Version: 1.0 +Generator: bdist_wheel (0.37.0) +Root-Is-Purelib: true +Tag: py3-none-any + diff --git a/.venv/lib/python3.6/site-packages/click-8.0.3.dist-info/top_level.txt b/.venv/lib/python3.6/site-packages/click-8.0.3.dist-info/top_level.txt new file mode 100644 index 0000000..dca9a90 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click-8.0.3.dist-info/top_level.txt @@ -0,0 +1 @@ +click diff --git a/.venv/lib/python3.6/site-packages/click/__init__.py b/.venv/lib/python3.6/site-packages/click/__init__.py new file mode 100644 index 0000000..a2ed5d1 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/__init__.py @@ -0,0 +1,75 @@ +""" +Click is a simple Python module inspired by the stdlib optparse to make +writing command line scripts fun. Unlike other modules, it's based +around a simple API that does not come with too much magic and is +composable. +""" +from .core import Argument as Argument +from .core import BaseCommand as BaseCommand +from .core import Command as Command +from .core import CommandCollection as CommandCollection +from .core import Context as Context +from .core import Group as Group +from .core import MultiCommand as MultiCommand +from .core import Option as Option +from .core import Parameter as Parameter +from .decorators import argument as argument +from .decorators import command as command +from .decorators import confirmation_option as confirmation_option +from .decorators import group as group +from .decorators import help_option as help_option +from .decorators import make_pass_decorator as make_pass_decorator +from .decorators import option as option +from .decorators import pass_context as pass_context +from .decorators import pass_obj as pass_obj +from .decorators import password_option as password_option +from .decorators import version_option as version_option +from .exceptions import Abort as Abort +from .exceptions import BadArgumentUsage as BadArgumentUsage +from .exceptions import BadOptionUsage as BadOptionUsage +from .exceptions import BadParameter as BadParameter +from .exceptions import ClickException as ClickException +from .exceptions import FileError as FileError +from .exceptions import MissingParameter as MissingParameter +from .exceptions import NoSuchOption as NoSuchOption +from .exceptions import UsageError as UsageError +from .formatting import HelpFormatter as HelpFormatter +from .formatting import wrap_text as wrap_text +from .globals import get_current_context as get_current_context +from .parser import OptionParser as OptionParser +from .termui import clear as clear +from .termui import confirm as confirm +from .termui import echo_via_pager as echo_via_pager +from .termui import edit as edit +from .termui import get_terminal_size as get_terminal_size +from .termui import getchar as getchar +from .termui import launch as launch +from .termui import pause as pause +from .termui import progressbar as progressbar +from .termui import prompt as prompt +from .termui import secho as secho +from .termui import style as style +from .termui import unstyle as unstyle +from .types import BOOL as BOOL +from .types import Choice as Choice +from .types import DateTime as DateTime +from .types import File as File +from .types import FLOAT as FLOAT +from .types import FloatRange as FloatRange +from .types import INT as INT +from .types import IntRange as IntRange +from .types import ParamType as ParamType +from .types import Path as Path +from .types import STRING as STRING +from .types import Tuple as Tuple +from .types import UNPROCESSED as UNPROCESSED +from .types import UUID as UUID +from .utils import echo as echo +from .utils import format_filename as format_filename +from .utils import get_app_dir as get_app_dir +from .utils import get_binary_stream as get_binary_stream +from .utils import get_os_args as get_os_args +from .utils import get_text_stream as get_text_stream +from .utils import open_file as open_file + +__version__ = "8.0.3" diff --git a/.venv/lib/python3.6/site-packages/click/__pycache__/__init__.cpython-36.pyc b/.venv/lib/python3.6/site-packages/click/__pycache__/__init__.cpython-36.pyc new file mode 100644 index 0000000000000000000000000000000000000000..311ccf6a96907c92ea632ba26487be5501a32420 GIT binary patch literal 2702 zcmd7U$yVb=6b4`ewlT)cLo=g>rfDXdd7jPCbeK*9o4e7GrNXYD=~T(k^b_P&a^6HD$gnf$7HDC&pj)Ap-HL95Hg+4j9opIL=nm*$cc43=lii8#f-ZI!x*NLL-RK_Z zVfUbWp_kq3zVrH^kNpna5B=;u^Z*R7`_Y3i$R0os!4P{8Jq*L_A@m50u!qs3Fv=c5 z8(^?U-S^%YjIj;$IE=I3yC1v>m|%~&AH7MKWRJU_yeXJse?U*eG>2a|EU;(Mi?GO^LodM+JBwb1Wp)m|0xRr!chy^i zHTD8}9oE^4=ndFlFQGSKlf8`If-Uw6dKuc~{yGhSY{-Xz7KnFs`4YQs5h2;FR%5`Z|wh)TlH zk>kpO5rk1_DJ_gBFg)u)q@R?Gq+c}b!1FBMF$%XMGqY^HQ>z3^jE?$(jK`Tm~ 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zi7Emoose)da^Yk1Ds-7|4aC|7jHN1Go`+kIj3m@BUq+H*B#A=a8#aeH4L*>(89A7y z6N-1ifL6p~H4WzU@ZBHWzTUd}!S$;j-dKEp>8P0n)(z~DF=M=-5TsRRWPIP(Y3(Z9 z1X72w?v4^Z1*7p;zrot81nYvO str: + return sys.getfilesystemencoding() or sys.getdefaultencoding() + + +def _make_text_stream( + stream: t.BinaryIO, + encoding: t.Optional[str], + errors: t.Optional[str], + force_readable: bool = False, + force_writable: bool = False, +) -> t.TextIO: + if encoding is None: + encoding = get_best_encoding(stream) + if errors is None: + errors = "replace" + return _NonClosingTextIOWrapper( + stream, + encoding, + errors, + line_buffering=True, + force_readable=force_readable, + force_writable=force_writable, + ) + + +def is_ascii_encoding(encoding: str) -> bool: + """Checks if a given encoding is ascii.""" + try: + return codecs.lookup(encoding).name == "ascii" + except LookupError: + return False + + +def get_best_encoding(stream: t.IO) -> str: + """Returns the default stream encoding if not found.""" + rv = getattr(stream, "encoding", None) or sys.getdefaultencoding() + if is_ascii_encoding(rv): + return "utf-8" + return rv + + +class _NonClosingTextIOWrapper(io.TextIOWrapper): + def __init__( + self, + stream: t.BinaryIO, + encoding: t.Optional[str], + errors: t.Optional[str], + force_readable: bool = False, + force_writable: bool = False, + **extra: t.Any, + ) -> None: + self._stream = stream = t.cast( + t.BinaryIO, _FixupStream(stream, force_readable, force_writable) + ) + super().__init__(stream, encoding, errors, **extra) + + def __del__(self) -> None: + try: + self.detach() + except Exception: + pass + + def isatty(self) -> bool: + # https://bitbucket.org/pypy/pypy/issue/1803 + return self._stream.isatty() + + +class _FixupStream: + """The new io interface needs more from streams than streams + traditionally implement. As such, this fix-up code is necessary in + some circumstances. + + The forcing of readable and writable flags are there because some tools + put badly patched objects on sys (one such offender are certain version + of jupyter notebook). + """ + + def __init__( + self, + stream: t.BinaryIO, + force_readable: bool = False, + force_writable: bool = False, + ): + self._stream = stream + self._force_readable = force_readable + self._force_writable = force_writable + + def __getattr__(self, name: str) -> t.Any: + return getattr(self._stream, name) + + def read1(self, size: int) -> bytes: + f = getattr(self._stream, "read1", None) + + if f is not None: + return t.cast(bytes, f(size)) + + return self._stream.read(size) + + def readable(self) -> bool: + if self._force_readable: + return True + x = getattr(self._stream, "readable", None) + if x is not None: + return t.cast(bool, x()) + try: + self._stream.read(0) + except Exception: + return False + return True + + def writable(self) -> bool: + if self._force_writable: + return True + x = getattr(self._stream, "writable", None) + if x is not None: + return t.cast(bool, x()) + try: + self._stream.write("") # type: ignore + except Exception: + try: + self._stream.write(b"") + except Exception: + return False + return True + + def seekable(self) -> bool: + x = getattr(self._stream, "seekable", None) + if x is not None: + return t.cast(bool, x()) + try: + self._stream.seek(self._stream.tell()) + except Exception: + return False + return True + + +def _is_binary_reader(stream: t.IO, default: bool = False) -> bool: + try: + return isinstance(stream.read(0), bytes) + except Exception: + return default + # This happens in some cases where the stream was already + # closed. In this case, we assume the default. + + +def _is_binary_writer(stream: t.IO, default: bool = False) -> bool: + try: + stream.write(b"") + except Exception: + try: + stream.write("") + return False + except Exception: + pass + return default + return True + + +def _find_binary_reader(stream: t.IO) -> t.Optional[t.BinaryIO]: + # We need to figure out if the given stream is already binary. + # This can happen because the official docs recommend detaching + # the streams to get binary streams. Some code might do this, so + # we need to deal with this case explicitly. + if _is_binary_reader(stream, False): + return t.cast(t.BinaryIO, stream) + + buf = getattr(stream, "buffer", None) + + # Same situation here; this time we assume that the buffer is + # actually binary in case it's closed. + if buf is not None and _is_binary_reader(buf, True): + return t.cast(t.BinaryIO, buf) + + return None + + +def _find_binary_writer(stream: t.IO) -> t.Optional[t.BinaryIO]: + # We need to figure out if the given stream is already binary. + # This can happen because the official docs recommend detaching + # the streams to get binary streams. Some code might do this, so + # we need to deal with this case explicitly. + if _is_binary_writer(stream, False): + return t.cast(t.BinaryIO, stream) + + buf = getattr(stream, "buffer", None) + + # Same situation here; this time we assume that the buffer is + # actually binary in case it's closed. + if buf is not None and _is_binary_writer(buf, True): + return t.cast(t.BinaryIO, buf) + + return None + + +def _stream_is_misconfigured(stream: t.TextIO) -> bool: + """A stream is misconfigured if its encoding is ASCII.""" + # If the stream does not have an encoding set, we assume it's set + # to ASCII. This appears to happen in certain unittest + # environments. It's not quite clear what the correct behavior is + # but this at least will force Click to recover somehow. + return is_ascii_encoding(getattr(stream, "encoding", None) or "ascii") + + +def _is_compat_stream_attr(stream: t.TextIO, attr: str, value: t.Optional[str]) -> bool: + """A stream attribute is compatible if it is equal to the + desired value or the desired value is unset and the attribute + has a value. + """ + stream_value = getattr(stream, attr, None) + return stream_value == value or (value is None and stream_value is not None) + + +def _is_compatible_text_stream( + stream: t.TextIO, encoding: t.Optional[str], errors: t.Optional[str] +) -> bool: + """Check if a stream's encoding and errors attributes are + compatible with the desired values. + """ + return _is_compat_stream_attr( + stream, "encoding", encoding + ) and _is_compat_stream_attr(stream, "errors", errors) + + +def _force_correct_text_stream( + text_stream: t.IO, + encoding: t.Optional[str], + errors: t.Optional[str], + is_binary: t.Callable[[t.IO, bool], bool], + find_binary: t.Callable[[t.IO], t.Optional[t.BinaryIO]], + force_readable: bool = False, + force_writable: bool = False, +) -> t.TextIO: + if is_binary(text_stream, False): + binary_reader = t.cast(t.BinaryIO, text_stream) + else: + text_stream = t.cast(t.TextIO, text_stream) + # If the stream looks compatible, and won't default to a + # misconfigured ascii encoding, return it as-is. + if _is_compatible_text_stream(text_stream, encoding, errors) and not ( + encoding is None and _stream_is_misconfigured(text_stream) + ): + return text_stream + + # Otherwise, get the underlying binary reader. + possible_binary_reader = find_binary(text_stream) + + # If that's not possible, silently use the original reader + # and get mojibake instead of exceptions. + if possible_binary_reader is None: + return text_stream + + binary_reader = possible_binary_reader + + # Default errors to replace instead of strict in order to get + # something that works. + if errors is None: + errors = "replace" + + # Wrap the binary stream in a text stream with the correct + # encoding parameters. + return _make_text_stream( + binary_reader, + encoding, + errors, + force_readable=force_readable, + force_writable=force_writable, + ) + + +def _force_correct_text_reader( + text_reader: t.IO, + encoding: t.Optional[str], + errors: t.Optional[str], + force_readable: bool = False, +) -> t.TextIO: + return _force_correct_text_stream( + text_reader, + encoding, + errors, + _is_binary_reader, + _find_binary_reader, + force_readable=force_readable, + ) + + +def _force_correct_text_writer( + text_writer: t.IO, + encoding: t.Optional[str], + errors: t.Optional[str], + force_writable: bool = False, +) -> t.TextIO: + return _force_correct_text_stream( + text_writer, + encoding, + errors, + _is_binary_writer, + _find_binary_writer, + force_writable=force_writable, + ) + + +def get_binary_stdin() -> t.BinaryIO: + reader = _find_binary_reader(sys.stdin) + if reader is None: + raise RuntimeError("Was not able to determine binary stream for sys.stdin.") + return reader + + +def get_binary_stdout() -> t.BinaryIO: + writer = _find_binary_writer(sys.stdout) + if writer is None: + raise RuntimeError("Was not able to determine binary stream for sys.stdout.") + return writer + + +def get_binary_stderr() -> t.BinaryIO: + writer = _find_binary_writer(sys.stderr) + if writer is None: + raise RuntimeError("Was not able to determine binary stream for sys.stderr.") + return writer + + +def get_text_stdin( + encoding: t.Optional[str] = None, errors: t.Optional[str] = None +) -> t.TextIO: + rv = _get_windows_console_stream(sys.stdin, encoding, errors) + if rv is not None: + return rv + return _force_correct_text_reader(sys.stdin, encoding, errors, force_readable=True) + + +def get_text_stdout( + encoding: t.Optional[str] = None, errors: t.Optional[str] = None +) -> t.TextIO: + rv = _get_windows_console_stream(sys.stdout, encoding, errors) + if rv is not None: + return rv + return _force_correct_text_writer(sys.stdout, encoding, errors, force_writable=True) + + +def get_text_stderr( + encoding: t.Optional[str] = None, errors: t.Optional[str] = None +) -> t.TextIO: + rv = _get_windows_console_stream(sys.stderr, encoding, errors) + if rv is not None: + return rv + return _force_correct_text_writer(sys.stderr, encoding, errors, force_writable=True) + + +def _wrap_io_open( + file: t.Union[str, os.PathLike, int], + mode: str, + encoding: t.Optional[str], + errors: t.Optional[str], +) -> t.IO: + """Handles not passing ``encoding`` and ``errors`` in binary mode.""" + if "b" in mode: + return open(file, mode) + + return open(file, mode, encoding=encoding, errors=errors) + + +def open_stream( + filename: str, + mode: str = "r", + encoding: t.Optional[str] = None, + errors: t.Optional[str] = "strict", + atomic: bool = False, +) -> t.Tuple[t.IO, bool]: + binary = "b" in mode + + # Standard streams first. These are simple because they don't need + # special handling for the atomic flag. It's entirely ignored. + if filename == "-": + if any(m in mode for m in ["w", "a", "x"]): + if binary: + return get_binary_stdout(), False + return get_text_stdout(encoding=encoding, errors=errors), False + if binary: + return get_binary_stdin(), False + return get_text_stdin(encoding=encoding, errors=errors), False + + # Non-atomic writes directly go out through the regular open functions. + if not atomic: + return _wrap_io_open(filename, mode, encoding, errors), True + + # Some usability stuff for atomic writes + if "a" in mode: + raise ValueError( + "Appending to an existing file is not supported, because that" + " would involve an expensive `copy`-operation to a temporary" + " file. Open the file in normal `w`-mode and copy explicitly" + " if that's what you're after." + ) + if "x" in mode: + raise ValueError("Use the `overwrite`-parameter instead.") + if "w" not in mode: + raise ValueError("Atomic writes only make sense with `w`-mode.") + + # Atomic writes are more complicated. They work by opening a file + # as a proxy in the same folder and then using the fdopen + # functionality to wrap it in a Python file. Then we wrap it in an + # atomic file that moves the file over on close. + import errno + import random + + try: + perm: t.Optional[int] = os.stat(filename).st_mode + except OSError: + perm = None + + flags = os.O_RDWR | os.O_CREAT | os.O_EXCL + + if binary: + flags |= getattr(os, "O_BINARY", 0) + + while True: + tmp_filename = os.path.join( + os.path.dirname(filename), + f".__atomic-write{random.randrange(1 << 32):08x}", + ) + try: + fd = os.open(tmp_filename, flags, 0o666 if perm is None else perm) + break + except OSError as e: + if e.errno == errno.EEXIST or ( + os.name == "nt" + and e.errno == errno.EACCES + and os.path.isdir(e.filename) + and os.access(e.filename, os.W_OK) + ): + continue + raise + + if perm is not None: + os.chmod(tmp_filename, perm) # in case perm includes bits in umask + + f = _wrap_io_open(fd, mode, encoding, errors) + af = _AtomicFile(f, tmp_filename, os.path.realpath(filename)) + return t.cast(t.IO, af), True + + +class _AtomicFile: + def __init__(self, f: t.IO, tmp_filename: str, real_filename: str) -> None: + self._f = f + self._tmp_filename = tmp_filename + self._real_filename = real_filename + self.closed = False + + @property + def name(self) -> str: + return self._real_filename + + def close(self, delete: bool = False) -> None: + if self.closed: + return + self._f.close() + os.replace(self._tmp_filename, self._real_filename) + self.closed = True + + def __getattr__(self, name: str) -> t.Any: + return getattr(self._f, name) + + def __enter__(self) -> "_AtomicFile": + return self + + def __exit__(self, exc_type, exc_value, tb): # type: ignore + self.close(delete=exc_type is not None) + + def __repr__(self) -> str: + return repr(self._f) + + +def strip_ansi(value: str) -> str: + return _ansi_re.sub("", value) + + +def _is_jupyter_kernel_output(stream: t.IO) -> bool: + while isinstance(stream, (_FixupStream, _NonClosingTextIOWrapper)): + stream = stream._stream + + return stream.__class__.__module__.startswith("ipykernel.") + + +def should_strip_ansi( + stream: t.Optional[t.IO] = None, color: t.Optional[bool] = None +) -> bool: + if color is None: + if stream is None: + stream = sys.stdin + return not isatty(stream) and not _is_jupyter_kernel_output(stream) + return not color + + +# On Windows, wrap the output streams with colorama to support ANSI +# color codes. +# NOTE: double check is needed so mypy does not analyze this on Linux +if sys.platform.startswith("win") and WIN: + from ._winconsole import _get_windows_console_stream + + def _get_argv_encoding() -> str: + import locale + + return locale.getpreferredencoding() + + _ansi_stream_wrappers: t.MutableMapping[t.TextIO, t.TextIO] = WeakKeyDictionary() + + def auto_wrap_for_ansi( + stream: t.TextIO, color: t.Optional[bool] = None + ) -> t.TextIO: + """Support ANSI color and style codes on Windows by wrapping a + stream with colorama. + """ + try: + cached = _ansi_stream_wrappers.get(stream) + except Exception: + cached = None + + if cached is not None: + return cached + + import colorama + + strip = should_strip_ansi(stream, color) + ansi_wrapper = colorama.AnsiToWin32(stream, strip=strip) + rv = t.cast(t.TextIO, ansi_wrapper.stream) + _write = rv.write + + def _safe_write(s): + try: + return _write(s) + except BaseException: + ansi_wrapper.reset_all() + raise + + rv.write = _safe_write + + try: + _ansi_stream_wrappers[stream] = rv + except Exception: + pass + + return rv + + +else: + + def _get_argv_encoding() -> str: + return getattr(sys.stdin, "encoding", None) or get_filesystem_encoding() + + def _get_windows_console_stream( + f: t.TextIO, encoding: t.Optional[str], errors: t.Optional[str] + ) -> t.Optional[t.TextIO]: + return None + + +def term_len(x: str) -> int: + return len(strip_ansi(x)) + + +def isatty(stream: t.IO) -> bool: + try: + return stream.isatty() + except Exception: + return False + + +def _make_cached_stream_func( + src_func: t.Callable[[], t.TextIO], wrapper_func: t.Callable[[], t.TextIO] +) -> t.Callable[[], t.TextIO]: + cache: t.MutableMapping[t.TextIO, t.TextIO] = WeakKeyDictionary() + + def func() -> t.TextIO: + stream = src_func() + try: + rv = cache.get(stream) + except Exception: + rv = None + if rv is not None: + return rv + rv = wrapper_func() + try: + cache[stream] = rv + except Exception: + pass + return rv + + return func + + +_default_text_stdin = _make_cached_stream_func(lambda: sys.stdin, get_text_stdin) +_default_text_stdout = _make_cached_stream_func(lambda: sys.stdout, get_text_stdout) +_default_text_stderr = _make_cached_stream_func(lambda: sys.stderr, get_text_stderr) + + +binary_streams: t.Mapping[str, t.Callable[[], t.BinaryIO]] = { + "stdin": get_binary_stdin, + "stdout": get_binary_stdout, + "stderr": get_binary_stderr, +} + +text_streams: t.Mapping[ + str, t.Callable[[t.Optional[str], t.Optional[str]], t.TextIO] +] = { + "stdin": get_text_stdin, + "stdout": get_text_stdout, + "stderr": get_text_stderr, +} diff --git a/.venv/lib/python3.6/site-packages/click/_termui_impl.py b/.venv/lib/python3.6/site-packages/click/_termui_impl.py new file mode 100644 index 0000000..39c1d08 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/_termui_impl.py @@ -0,0 +1,718 @@ +""" +This module contains implementations for the termui module. To keep the +import time of Click down, some infrequently used functionality is +placed in this module and only imported as needed. +""" +import contextlib +import math +import os +import sys +import time +import typing as t +from gettext import gettext as _ + +from ._compat import _default_text_stdout +from ._compat import CYGWIN +from ._compat import get_best_encoding +from ._compat import isatty +from ._compat import open_stream +from ._compat import strip_ansi +from ._compat import term_len +from ._compat import WIN +from .exceptions import ClickException +from .utils import echo + +V = t.TypeVar("V") + +if os.name == "nt": + BEFORE_BAR = "\r" + AFTER_BAR = "\n" +else: + BEFORE_BAR = "\r\033[?25l" + AFTER_BAR = "\033[?25h\n" + + +class ProgressBar(t.Generic[V]): + def __init__( + self, + iterable: t.Optional[t.Iterable[V]], + length: t.Optional[int] = None, + fill_char: str = "#", + empty_char: str = " ", + bar_template: str = "%(bar)s", + info_sep: str = " ", + show_eta: bool = True, + show_percent: t.Optional[bool] = None, + show_pos: bool = False, + item_show_func: t.Optional[t.Callable[[t.Optional[V]], t.Optional[str]]] = None, + label: t.Optional[str] = None, + file: t.Optional[t.TextIO] = None, + color: t.Optional[bool] = None, + update_min_steps: int = 1, + width: int = 30, + ) -> None: + self.fill_char = fill_char + self.empty_char = empty_char + self.bar_template = bar_template + self.info_sep = info_sep + self.show_eta = show_eta + self.show_percent = show_percent + self.show_pos = show_pos + self.item_show_func = item_show_func + self.label = label or "" + if file is None: + file = _default_text_stdout() + self.file = file + self.color = color + self.update_min_steps = update_min_steps + self._completed_intervals = 0 + self.width = width + self.autowidth = width == 0 + + if length is None: + from operator import length_hint + + length = length_hint(iterable, -1) + + if length == -1: + length = None + if iterable is None: + if length is None: + raise TypeError("iterable or length is required") + iterable = t.cast(t.Iterable[V], range(length)) + self.iter = iter(iterable) + self.length = length + self.pos = 0 + self.avg: t.List[float] = [] + self.start = self.last_eta = time.time() + self.eta_known = False + self.finished = False + self.max_width: t.Optional[int] = None + self.entered = False + self.current_item: t.Optional[V] = None + self.is_hidden = not isatty(self.file) + self._last_line: t.Optional[str] = None + + def __enter__(self) -> "ProgressBar": + self.entered = True + self.render_progress() + return self + + def __exit__(self, exc_type, exc_value, tb): # type: ignore + self.render_finish() + + def __iter__(self) -> t.Iterator[V]: + if not self.entered: + raise RuntimeError("You need to use progress bars in a with block.") + self.render_progress() + return self.generator() + + def __next__(self) -> V: + # Iteration is defined in terms of a generator function, + # returned by iter(self); use that to define next(). This works + # because `self.iter` is an iterable consumed by that generator, + # so it is re-entry safe. Calling `next(self.generator())` + # twice works and does "what you want". + return next(iter(self)) + + def render_finish(self) -> None: + if self.is_hidden: + return + self.file.write(AFTER_BAR) + self.file.flush() + + @property + def pct(self) -> float: + if self.finished: + return 1.0 + return min(self.pos / (float(self.length or 1) or 1), 1.0) + + @property + def time_per_iteration(self) -> float: + if not self.avg: + return 0.0 + return sum(self.avg) / float(len(self.avg)) + + @property + def eta(self) -> float: + if self.length is not None and not self.finished: + return self.time_per_iteration * (self.length - self.pos) + return 0.0 + + def format_eta(self) -> str: + if self.eta_known: + t = int(self.eta) + seconds = t % 60 + t //= 60 + minutes = t % 60 + t //= 60 + hours = t % 24 + t //= 24 + if t > 0: + return f"{t}d {hours:02}:{minutes:02}:{seconds:02}" + else: + return f"{hours:02}:{minutes:02}:{seconds:02}" + return "" + + def format_pos(self) -> str: + pos = str(self.pos) + if self.length is not None: + pos += f"/{self.length}" + return pos + + def format_pct(self) -> str: + return f"{int(self.pct * 100): 4}%"[1:] + + def format_bar(self) -> str: + if self.length is not None: + bar_length = int(self.pct * self.width) + bar = self.fill_char * bar_length + bar += self.empty_char * (self.width - bar_length) + elif self.finished: + bar = self.fill_char * self.width + else: + chars = list(self.empty_char * (self.width or 1)) + if self.time_per_iteration != 0: + chars[ + int( + (math.cos(self.pos * self.time_per_iteration) / 2.0 + 0.5) + * self.width + ) + ] = self.fill_char + bar = "".join(chars) + return bar + + def format_progress_line(self) -> str: + show_percent = self.show_percent + + info_bits = [] + if self.length is not None and show_percent is None: + show_percent = not self.show_pos + + if self.show_pos: + info_bits.append(self.format_pos()) + if show_percent: + info_bits.append(self.format_pct()) + if self.show_eta and self.eta_known and not self.finished: + info_bits.append(self.format_eta()) + if self.item_show_func is not None: + item_info = self.item_show_func(self.current_item) + if item_info is not None: + info_bits.append(item_info) + + return ( + self.bar_template + % { + "label": self.label, + "bar": self.format_bar(), + "info": self.info_sep.join(info_bits), + } + ).rstrip() + + def render_progress(self) -> None: + import shutil + + if self.is_hidden: + # Only output the label as it changes if the output is not a + # TTY. Use file=stderr if you expect to be piping stdout. + if self._last_line != self.label: + self._last_line = self.label + echo(self.label, file=self.file, color=self.color) + + return + + buf = [] + # Update width in case the terminal has been resized + if self.autowidth: + old_width = self.width + self.width = 0 + clutter_length = term_len(self.format_progress_line()) + new_width = max(0, shutil.get_terminal_size().columns - clutter_length) + if new_width < old_width: + buf.append(BEFORE_BAR) + buf.append(" " * self.max_width) # type: ignore + self.max_width = new_width + self.width = new_width + + clear_width = self.width + if self.max_width is not None: + clear_width = self.max_width + + buf.append(BEFORE_BAR) + line = self.format_progress_line() + line_len = term_len(line) + if self.max_width is None or self.max_width < line_len: + self.max_width = line_len + + buf.append(line) + buf.append(" " * (clear_width - line_len)) + line = "".join(buf) + # Render the line only if it changed. + + if line != self._last_line: + self._last_line = line + echo(line, file=self.file, color=self.color, nl=False) + self.file.flush() + + def make_step(self, n_steps: int) -> None: + self.pos += n_steps + if self.length is not None and self.pos >= self.length: + self.finished = True + + if (time.time() - self.last_eta) < 1.0: + return + + self.last_eta = time.time() + + # self.avg is a rolling list of length <= 7 of steps where steps are + # defined as time elapsed divided by the total progress through + # self.length. + if self.pos: + step = (time.time() - self.start) / self.pos + else: + step = time.time() - self.start + + self.avg = self.avg[-6:] + [step] + + self.eta_known = self.length is not None + + def update(self, n_steps: int, current_item: t.Optional[V] = None) -> None: + """Update the progress bar by advancing a specified number of + steps, and optionally set the ``current_item`` for this new + position. + + :param n_steps: Number of steps to advance. + :param current_item: Optional item to set as ``current_item`` + for the updated position. + + .. versionchanged:: 8.0 + Added the ``current_item`` optional parameter. + + .. versionchanged:: 8.0 + Only render when the number of steps meets the + ``update_min_steps`` threshold. + """ + if current_item is not None: + self.current_item = current_item + + self._completed_intervals += n_steps + + if self._completed_intervals >= self.update_min_steps: + self.make_step(self._completed_intervals) + self.render_progress() + self._completed_intervals = 0 + + def finish(self) -> None: + self.eta_known = False + self.current_item = None + self.finished = True + + def generator(self) -> t.Iterator[V]: + """Return a generator which yields the items added to the bar + during construction, and updates the progress bar *after* the + yielded block returns. + """ + # WARNING: the iterator interface for `ProgressBar` relies on + # this and only works because this is a simple generator which + # doesn't create or manage additional state. If this function + # changes, the impact should be evaluated both against + # `iter(bar)` and `next(bar)`. `next()` in particular may call + # `self.generator()` repeatedly, and this must remain safe in + # order for that interface to work. + if not self.entered: + raise RuntimeError("You need to use progress bars in a with block.") + + if self.is_hidden: + yield from self.iter + else: + for rv in self.iter: + self.current_item = rv + + # This allows show_item_func to be updated before the + # item is processed. Only trigger at the beginning of + # the update interval. + if self._completed_intervals == 0: + self.render_progress() + + yield rv + self.update(1) + + self.finish() + self.render_progress() + + +def pager(generator: t.Iterable[str], color: t.Optional[bool] = None) -> None: + """Decide what method to use for paging through text.""" + stdout = _default_text_stdout() + if not isatty(sys.stdin) or not isatty(stdout): + return _nullpager(stdout, generator, color) + pager_cmd = (os.environ.get("PAGER", None) or "").strip() + if pager_cmd: + if WIN: + return _tempfilepager(generator, pager_cmd, color) + return _pipepager(generator, pager_cmd, color) + if os.environ.get("TERM") in ("dumb", "emacs"): + return _nullpager(stdout, generator, color) + if WIN or sys.platform.startswith("os2"): + return _tempfilepager(generator, "more <", color) + if hasattr(os, "system") and os.system("(less) 2>/dev/null") == 0: + return _pipepager(generator, "less", color) + + import tempfile + + fd, filename = tempfile.mkstemp() + os.close(fd) + try: + if hasattr(os, "system") and os.system(f'more "{filename}"') == 0: + return _pipepager(generator, "more", color) + return _nullpager(stdout, generator, color) + finally: + os.unlink(filename) + + +def _pipepager(generator: t.Iterable[str], cmd: str, color: t.Optional[bool]) -> None: + """Page through text by feeding it to another program. Invoking a + pager through this might support colors. + """ + import subprocess + + env = dict(os.environ) + + # If we're piping to less we might support colors under the + # condition that + cmd_detail = cmd.rsplit("/", 1)[-1].split() + if color is None and cmd_detail[0] == "less": + less_flags = f"{os.environ.get('LESS', '')}{' '.join(cmd_detail[1:])}" + if not less_flags: + env["LESS"] = "-R" + color = True + elif "r" in less_flags or "R" in less_flags: + color = True + + c = subprocess.Popen(cmd, shell=True, stdin=subprocess.PIPE, env=env) + stdin = t.cast(t.BinaryIO, c.stdin) + encoding = get_best_encoding(stdin) + try: + for text in generator: + if not color: + text = strip_ansi(text) + + stdin.write(text.encode(encoding, "replace")) + except (OSError, KeyboardInterrupt): + pass + else: + stdin.close() + + # Less doesn't respect ^C, but catches it for its own UI purposes (aborting + # search or other commands inside less). + # + # That means when the user hits ^C, the parent process (click) terminates, + # but less is still alive, paging the output and messing up the terminal. + # + # If the user wants to make the pager exit on ^C, they should set + # `LESS='-K'`. It's not our decision to make. + while True: + try: + c.wait() + except KeyboardInterrupt: + pass + else: + break + + +def _tempfilepager( + generator: t.Iterable[str], cmd: str, color: t.Optional[bool] +) -> None: + """Page through text by invoking a program on a temporary file.""" + import tempfile + + fd, filename = tempfile.mkstemp() + # TODO: This never terminates if the passed generator never terminates. + text = "".join(generator) + if not color: + text = strip_ansi(text) + encoding = get_best_encoding(sys.stdout) + with open_stream(filename, "wb")[0] as f: + f.write(text.encode(encoding)) + try: + os.system(f'{cmd} "{filename}"') + finally: + os.close(fd) + os.unlink(filename) + + +def _nullpager( + stream: t.TextIO, generator: t.Iterable[str], color: t.Optional[bool] +) -> None: + """Simply print unformatted text. This is the ultimate fallback.""" + for text in generator: + if not color: + text = strip_ansi(text) + stream.write(text) + + +class Editor: + def __init__( + self, + editor: t.Optional[str] = None, + env: t.Optional[t.Mapping[str, str]] = None, + require_save: bool = True, + extension: str = ".txt", + ) -> None: + self.editor = editor + self.env = env + self.require_save = require_save + self.extension = extension + + def get_editor(self) -> str: + if self.editor is not None: + return self.editor + for key in "VISUAL", "EDITOR": + rv = os.environ.get(key) + if rv: + return rv + if WIN: + return "notepad" + for editor in "sensible-editor", "vim", "nano": + if os.system(f"which {editor} >/dev/null 2>&1") == 0: + return editor + return "vi" + + def edit_file(self, filename: str) -> None: + import subprocess + + editor = self.get_editor() + environ: t.Optional[t.Dict[str, str]] = None + + if self.env: + environ = os.environ.copy() + environ.update(self.env) + + try: + c = subprocess.Popen(f'{editor} "{filename}"', env=environ, shell=True) + exit_code = c.wait() + if exit_code != 0: + raise ClickException( + _("{editor}: Editing failed").format(editor=editor) + ) + except OSError as e: + raise ClickException( + _("{editor}: Editing failed: {e}").format(editor=editor, e=e) + ) from e + + def edit(self, text: t.Optional[t.AnyStr]) -> t.Optional[t.AnyStr]: + import tempfile + + if not text: + data = b"" + elif isinstance(text, (bytes, bytearray)): + data = text + else: + if text and not text.endswith("\n"): + text += "\n" + + if WIN: + data = text.replace("\n", "\r\n").encode("utf-8-sig") + else: + data = text.encode("utf-8") + + fd, name = tempfile.mkstemp(prefix="editor-", suffix=self.extension) + f: t.BinaryIO + + try: + with os.fdopen(fd, "wb") as f: + f.write(data) + + # If the filesystem resolution is 1 second, like Mac OS + # 10.12 Extended, or 2 seconds, like FAT32, and the editor + # closes very fast, require_save can fail. Set the modified + # time to be 2 seconds in the past to work around this. + os.utime(name, (os.path.getatime(name), os.path.getmtime(name) - 2)) + # Depending on the resolution, the exact value might not be + # recorded, so get the new recorded value. + timestamp = os.path.getmtime(name) + + self.edit_file(name) + + if self.require_save and os.path.getmtime(name) == timestamp: + return None + + with open(name, "rb") as f: + rv = f.read() + + if isinstance(text, (bytes, bytearray)): + return rv + + return rv.decode("utf-8-sig").replace("\r\n", "\n") # type: ignore + finally: + os.unlink(name) + + +def open_url(url: str, wait: bool = False, locate: bool = False) -> int: + import subprocess + + def _unquote_file(url: str) -> str: + from urllib.parse import unquote + + if url.startswith("file://"): + url = unquote(url[7:]) + + return url + + if sys.platform == "darwin": + args = ["open"] + if wait: + args.append("-W") + if locate: + args.append("-R") + args.append(_unquote_file(url)) + null = open("/dev/null", "w") + try: + return subprocess.Popen(args, stderr=null).wait() + finally: + null.close() + elif WIN: + if locate: + url = _unquote_file(url.replace('"', "")) + args = f'explorer /select,"{url}"' + else: + url = url.replace('"', "") + wait_str = "/WAIT" if wait else "" + args = f'start {wait_str} "" "{url}"' + return os.system(args) + elif CYGWIN: + if locate: + url = os.path.dirname(_unquote_file(url).replace('"', "")) + args = f'cygstart "{url}"' + else: + url = url.replace('"', "") + wait_str = "-w" if wait else "" + args = f'cygstart {wait_str} "{url}"' + return os.system(args) + + try: + if locate: + url = os.path.dirname(_unquote_file(url)) or "." + else: + url = _unquote_file(url) + c = subprocess.Popen(["xdg-open", url]) + if wait: + return c.wait() + return 0 + except OSError: + if url.startswith(("http://", "https://")) and not locate and not wait: + import webbrowser + + webbrowser.open(url) + return 0 + return 1 + + +def _translate_ch_to_exc(ch: str) -> t.Optional[BaseException]: + if ch == "\x03": + raise KeyboardInterrupt() + + if ch == "\x04" and not WIN: # Unix-like, Ctrl+D + raise EOFError() + + if ch == "\x1a" and WIN: # Windows, Ctrl+Z + raise EOFError() + + return None + + +if WIN: + import msvcrt + + @contextlib.contextmanager + def raw_terminal() -> t.Iterator[int]: + yield -1 + + def getchar(echo: bool) -> str: + # The function `getch` will return a bytes object corresponding to + # the pressed character. Since Windows 10 build 1803, it will also + # return \x00 when called a second time after pressing a regular key. + # + # `getwch` does not share this probably-bugged behavior. Moreover, it + # returns a Unicode object by default, which is what we want. + # + # Either of these functions will return \x00 or \xe0 to indicate + # a special key, and you need to call the same function again to get + # the "rest" of the code. The fun part is that \u00e0 is + # "latin small letter a with grave", so if you type that on a French + # keyboard, you _also_ get a \xe0. + # E.g., consider the Up arrow. This returns \xe0 and then \x48. The + # resulting Unicode string reads as "a with grave" + "capital H". + # This is indistinguishable from when the user actually types + # "a with grave" and then "capital H". + # + # When \xe0 is returned, we assume it's part of a special-key sequence + # and call `getwch` again, but that means that when the user types + # the \u00e0 character, `getchar` doesn't return until a second + # character is typed. + # The alternative is returning immediately, but that would mess up + # cross-platform handling of arrow keys and others that start with + # \xe0. Another option is using `getch`, but then we can't reliably + # read non-ASCII characters, because return values of `getch` are + # limited to the current 8-bit codepage. + # + # Anyway, Click doesn't claim to do this Right(tm), and using `getwch` + # is doing the right thing in more situations than with `getch`. + func: t.Callable[[], str] + + if echo: + func = msvcrt.getwche # type: ignore + else: + func = msvcrt.getwch # type: ignore + + rv = func() + + if rv in ("\x00", "\xe0"): + # \x00 and \xe0 are control characters that indicate special key, + # see above. + rv += func() + + _translate_ch_to_exc(rv) + return rv + + +else: + import tty + import termios + + @contextlib.contextmanager + def raw_terminal() -> t.Iterator[int]: + f: t.Optional[t.TextIO] + fd: int + + if not isatty(sys.stdin): + f = open("/dev/tty") + fd = f.fileno() + else: + fd = sys.stdin.fileno() + f = None + + try: + old_settings = termios.tcgetattr(fd) + + try: + tty.setraw(fd) + yield fd + finally: + termios.tcsetattr(fd, termios.TCSADRAIN, old_settings) + sys.stdout.flush() + + if f is not None: + f.close() + except termios.error: + pass + + def getchar(echo: bool) -> str: + with raw_terminal() as fd: + ch = os.read(fd, 32).decode(get_best_encoding(sys.stdin), "replace") + + if echo and isatty(sys.stdout): + sys.stdout.write(ch) + + _translate_ch_to_exc(ch) + return ch diff --git a/.venv/lib/python3.6/site-packages/click/_textwrap.py b/.venv/lib/python3.6/site-packages/click/_textwrap.py new file mode 100644 index 0000000..b47dcbd --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/_textwrap.py @@ -0,0 +1,49 @@ +import textwrap +import typing as t +from contextlib import contextmanager + + +class TextWrapper(textwrap.TextWrapper): + def _handle_long_word( + self, + reversed_chunks: t.List[str], + cur_line: t.List[str], + cur_len: int, + width: int, + ) -> None: + space_left = max(width - cur_len, 1) + + if self.break_long_words: + last = reversed_chunks[-1] + cut = last[:space_left] + res = last[space_left:] + cur_line.append(cut) + reversed_chunks[-1] = res + elif not cur_line: + cur_line.append(reversed_chunks.pop()) + + @contextmanager + def extra_indent(self, indent: str) -> t.Iterator[None]: + old_initial_indent = self.initial_indent + old_subsequent_indent = self.subsequent_indent + self.initial_indent += indent + self.subsequent_indent += indent + + try: + yield + finally: + self.initial_indent = old_initial_indent + self.subsequent_indent = old_subsequent_indent + + def indent_only(self, text: str) -> str: + rv = [] + + for idx, line in enumerate(text.splitlines()): + indent = self.initial_indent + + if idx > 0: + indent = self.subsequent_indent + + rv.append(f"{indent}{line}") + + return "\n".join(rv) diff --git a/.venv/lib/python3.6/site-packages/click/_unicodefun.py b/.venv/lib/python3.6/site-packages/click/_unicodefun.py new file mode 100644 index 0000000..9cb30c3 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/_unicodefun.py @@ -0,0 +1,100 @@ +import codecs +import os +from gettext import gettext as _ + + +def _verify_python_env() -> None: + """Ensures that the environment is good for Unicode.""" + try: + from locale import getpreferredencoding + + fs_enc = codecs.lookup(getpreferredencoding()).name + except Exception: + fs_enc = "ascii" + + if fs_enc != "ascii": + return + + extra = [ + _( + "Click will abort further execution because Python was" + " configured to use ASCII as encoding for the environment." + " Consult https://click.palletsprojects.com/unicode-support/" + " for mitigation steps." + ) + ] + + if os.name == "posix": + import subprocess + + try: + rv = subprocess.Popen( + ["locale", "-a"], + stdout=subprocess.PIPE, + stderr=subprocess.PIPE, + encoding="ascii", + errors="replace", + ).communicate()[0] + except OSError: + rv = "" + + good_locales = set() + has_c_utf8 = False + + for line in rv.splitlines(): + locale = line.strip() + + if locale.lower().endswith((".utf-8", ".utf8")): + good_locales.add(locale) + + if locale.lower() in ("c.utf8", "c.utf-8"): + has_c_utf8 = True + + if not good_locales: + extra.append( + _( + "Additional information: on this system no suitable" + " UTF-8 locales were discovered. This most likely" + " requires resolving by reconfiguring the locale" + " system." + ) + ) + elif has_c_utf8: + extra.append( + _( + "This system supports the C.UTF-8 locale which is" + " recommended. You might be able to resolve your" + " issue by exporting the following environment" + " variables:" + ) + ) + extra.append(" export LC_ALL=C.UTF-8\n export LANG=C.UTF-8") + else: + extra.append( + _( + "This system lists some UTF-8 supporting locales" + " that you can pick from. The following suitable" + " locales were discovered: {locales}" + ).format(locales=", ".join(sorted(good_locales))) + ) + + bad_locale = None + + for env_locale in os.environ.get("LC_ALL"), os.environ.get("LANG"): + if env_locale and env_locale.lower().endswith((".utf-8", ".utf8")): + bad_locale = env_locale + + if env_locale is not None: + break + + if bad_locale is not None: + extra.append( + _( + "Click discovered that you exported a UTF-8 locale" + " but the locale system could not pick up from it" + " because it does not exist. The exported locale is" + " {locale!r} but it is not supported." + ).format(locale=bad_locale) + ) + + raise RuntimeError("\n\n".join(extra)) diff --git a/.venv/lib/python3.6/site-packages/click/_winconsole.py b/.venv/lib/python3.6/site-packages/click/_winconsole.py new file mode 100644 index 0000000..6b20df3 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/_winconsole.py @@ -0,0 +1,279 @@ +# This module is based on the excellent work by Adam Bartoš who +# provided a lot of what went into the implementation here in +# the discussion to issue1602 in the Python bug tracker. +# +# There are some general differences in regards to how this works +# compared to the original patches as we do not need to patch +# the entire interpreter but just work in our little world of +# echo and prompt. +import io +import sys +import time +import typing as t +from ctypes import byref +from ctypes import c_char +from ctypes import c_char_p +from ctypes import c_int +from ctypes import c_ssize_t +from ctypes import c_ulong +from ctypes import c_void_p +from ctypes import POINTER +from ctypes import py_object +from ctypes import Structure +from ctypes.wintypes import DWORD +from ctypes.wintypes import HANDLE +from ctypes.wintypes import LPCWSTR +from ctypes.wintypes import LPWSTR + +from ._compat import _NonClosingTextIOWrapper + +assert sys.platform == "win32" +import msvcrt # noqa: E402 +from ctypes import windll # noqa: E402 +from ctypes import WINFUNCTYPE # noqa: E402 + +c_ssize_p = POINTER(c_ssize_t) + +kernel32 = windll.kernel32 +GetStdHandle = kernel32.GetStdHandle +ReadConsoleW = kernel32.ReadConsoleW +WriteConsoleW = kernel32.WriteConsoleW +GetConsoleMode = kernel32.GetConsoleMode +GetLastError = kernel32.GetLastError +GetCommandLineW = WINFUNCTYPE(LPWSTR)(("GetCommandLineW", windll.kernel32)) +CommandLineToArgvW = WINFUNCTYPE(POINTER(LPWSTR), LPCWSTR, POINTER(c_int))( + ("CommandLineToArgvW", windll.shell32) +) +LocalFree = WINFUNCTYPE(c_void_p, c_void_p)(("LocalFree", windll.kernel32)) + +STDIN_HANDLE = GetStdHandle(-10) +STDOUT_HANDLE = GetStdHandle(-11) +STDERR_HANDLE = GetStdHandle(-12) + +PyBUF_SIMPLE = 0 +PyBUF_WRITABLE = 1 + +ERROR_SUCCESS = 0 +ERROR_NOT_ENOUGH_MEMORY = 8 +ERROR_OPERATION_ABORTED = 995 + +STDIN_FILENO = 0 +STDOUT_FILENO = 1 +STDERR_FILENO = 2 + +EOF = b"\x1a" +MAX_BYTES_WRITTEN = 32767 + +try: + from ctypes import pythonapi +except ImportError: + # On PyPy we cannot get buffers so our ability to operate here is + # severely limited. + get_buffer = None +else: + + class Py_buffer(Structure): + _fields_ = [ + ("buf", c_void_p), + ("obj", py_object), + ("len", c_ssize_t), + ("itemsize", c_ssize_t), + ("readonly", c_int), + ("ndim", c_int), + ("format", c_char_p), + ("shape", c_ssize_p), + ("strides", c_ssize_p), + ("suboffsets", c_ssize_p), + ("internal", c_void_p), + ] + + PyObject_GetBuffer = pythonapi.PyObject_GetBuffer + PyBuffer_Release = pythonapi.PyBuffer_Release + + def get_buffer(obj, writable=False): + buf = Py_buffer() + flags = PyBUF_WRITABLE if writable else PyBUF_SIMPLE + PyObject_GetBuffer(py_object(obj), byref(buf), flags) + + try: + buffer_type = c_char * buf.len + return buffer_type.from_address(buf.buf) + finally: + PyBuffer_Release(byref(buf)) + + +class _WindowsConsoleRawIOBase(io.RawIOBase): + def __init__(self, handle): + self.handle = handle + + def isatty(self): + super().isatty() + return True + + +class _WindowsConsoleReader(_WindowsConsoleRawIOBase): + def readable(self): + return True + + def readinto(self, b): + bytes_to_be_read = len(b) + if not bytes_to_be_read: + return 0 + elif bytes_to_be_read % 2: + raise ValueError( + "cannot read odd number of bytes from UTF-16-LE encoded console" + ) + + buffer = get_buffer(b, writable=True) + code_units_to_be_read = bytes_to_be_read // 2 + code_units_read = c_ulong() + + rv = ReadConsoleW( + HANDLE(self.handle), + buffer, + code_units_to_be_read, + byref(code_units_read), + None, + ) + if GetLastError() == ERROR_OPERATION_ABORTED: + # wait for KeyboardInterrupt + time.sleep(0.1) + if not rv: + raise OSError(f"Windows error: {GetLastError()}") + + if buffer[0] == EOF: + return 0 + return 2 * code_units_read.value + + +class _WindowsConsoleWriter(_WindowsConsoleRawIOBase): + def writable(self): + return True + + @staticmethod + def _get_error_message(errno): + if errno == ERROR_SUCCESS: + return "ERROR_SUCCESS" + elif errno == ERROR_NOT_ENOUGH_MEMORY: + return "ERROR_NOT_ENOUGH_MEMORY" + return f"Windows error {errno}" + + def write(self, b): + bytes_to_be_written = len(b) + buf = get_buffer(b) + code_units_to_be_written = min(bytes_to_be_written, MAX_BYTES_WRITTEN) // 2 + code_units_written = c_ulong() + + WriteConsoleW( + HANDLE(self.handle), + buf, + code_units_to_be_written, + byref(code_units_written), + None, + ) + bytes_written = 2 * code_units_written.value + + if bytes_written == 0 and bytes_to_be_written > 0: + raise OSError(self._get_error_message(GetLastError())) + return bytes_written + + +class ConsoleStream: + def __init__(self, text_stream: t.TextIO, byte_stream: t.BinaryIO) -> None: + self._text_stream = text_stream + self.buffer = byte_stream + + @property + def name(self) -> str: + return self.buffer.name + + def write(self, x: t.AnyStr) -> int: + if isinstance(x, str): + return self._text_stream.write(x) + try: + self.flush() + except Exception: + pass + return self.buffer.write(x) + + def writelines(self, lines: t.Iterable[t.AnyStr]) -> None: + for line in lines: + self.write(line) + + def __getattr__(self, name: str) -> t.Any: + return getattr(self._text_stream, name) + + def isatty(self) -> bool: + return self.buffer.isatty() + + def __repr__(self): + return f"" + + +def _get_text_stdin(buffer_stream: t.BinaryIO) -> t.TextIO: + text_stream = _NonClosingTextIOWrapper( + io.BufferedReader(_WindowsConsoleReader(STDIN_HANDLE)), + "utf-16-le", + "strict", + line_buffering=True, + ) + return t.cast(t.TextIO, ConsoleStream(text_stream, buffer_stream)) + + +def _get_text_stdout(buffer_stream: t.BinaryIO) -> t.TextIO: + text_stream = _NonClosingTextIOWrapper( + io.BufferedWriter(_WindowsConsoleWriter(STDOUT_HANDLE)), + "utf-16-le", + "strict", + line_buffering=True, + ) + return t.cast(t.TextIO, ConsoleStream(text_stream, buffer_stream)) + + +def _get_text_stderr(buffer_stream: t.BinaryIO) -> t.TextIO: + text_stream = _NonClosingTextIOWrapper( + io.BufferedWriter(_WindowsConsoleWriter(STDERR_HANDLE)), + "utf-16-le", + "strict", + line_buffering=True, + ) + return t.cast(t.TextIO, ConsoleStream(text_stream, buffer_stream)) + + +_stream_factories: t.Mapping[int, t.Callable[[t.BinaryIO], t.TextIO]] = { + 0: _get_text_stdin, + 1: _get_text_stdout, + 2: _get_text_stderr, +} + + +def _is_console(f: t.TextIO) -> bool: + if not hasattr(f, "fileno"): + return False + + try: + fileno = f.fileno() + except (OSError, io.UnsupportedOperation): + return False + + handle = msvcrt.get_osfhandle(fileno) + return bool(GetConsoleMode(handle, byref(DWORD()))) + + +def _get_windows_console_stream( + f: t.TextIO, encoding: t.Optional[str], errors: t.Optional[str] +) -> t.Optional[t.TextIO]: + if ( + get_buffer is not None + and encoding in {"utf-16-le", None} + and errors in {"strict", None} + and _is_console(f) + ): + func = _stream_factories.get(f.fileno()) + if func is not None: + b = getattr(f, "buffer", None) + + if b is None: + return None + + return func(b) diff --git a/.venv/lib/python3.6/site-packages/click/core.py b/.venv/lib/python3.6/site-packages/click/core.py new file mode 100644 index 0000000..f226354 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/core.py @@ -0,0 +1,2953 @@ +import enum +import errno +import os +import sys +import typing +import typing as t +from collections import abc +from contextlib import contextmanager +from contextlib import ExitStack +from functools import partial +from functools import update_wrapper +from gettext import gettext as _ +from gettext import ngettext +from itertools import repeat + +from . import types +from ._unicodefun import _verify_python_env +from .exceptions import Abort +from .exceptions import BadParameter +from .exceptions import ClickException +from .exceptions import Exit +from .exceptions import MissingParameter +from .exceptions import UsageError +from .formatting import HelpFormatter +from .formatting import join_options +from .globals import pop_context +from .globals import push_context +from .parser import _flag_needs_value +from .parser import OptionParser +from .parser import split_opt +from .termui import confirm +from .termui import prompt +from .termui import style +from .utils import _detect_program_name +from .utils import _expand_args +from .utils import echo +from .utils import make_default_short_help +from .utils import make_str +from .utils import PacifyFlushWrapper + +if t.TYPE_CHECKING: + import typing_extensions as te + from .shell_completion import CompletionItem + +F = t.TypeVar("F", bound=t.Callable[..., t.Any]) +V = t.TypeVar("V") + + +def _complete_visible_commands( + ctx: "Context", incomplete: str +) -> t.Iterator[t.Tuple[str, "Command"]]: + """List all the subcommands of a group that start with the + incomplete value and aren't hidden. + + :param ctx: Invocation context for the group. + :param incomplete: Value being completed. May be empty. + """ + multi = t.cast(MultiCommand, ctx.command) + + for name in multi.list_commands(ctx): + if name.startswith(incomplete): + command = multi.get_command(ctx, name) + + if command is not None and not command.hidden: + yield name, command + + +def _check_multicommand( + base_command: "MultiCommand", cmd_name: str, cmd: "Command", register: bool = False +) -> None: + if not base_command.chain or not isinstance(cmd, MultiCommand): + return + if register: + hint = ( + "It is not possible to add multi commands as children to" + " another multi command that is in chain mode." + ) + else: + hint = ( + "Found a multi command as subcommand to a multi command" + " that is in chain mode. This is not supported." + ) + raise RuntimeError( + f"{hint}. Command {base_command.name!r} is set to chain and" + f" {cmd_name!r} was added as a subcommand but it in itself is a" + f" multi command. ({cmd_name!r} is a {type(cmd).__name__}" + f" within a chained {type(base_command).__name__} named" + f" {base_command.name!r})." + ) + + +def batch(iterable: t.Iterable[V], batch_size: int) -> t.List[t.Tuple[V, ...]]: + return list(zip(*repeat(iter(iterable), batch_size))) + + +@contextmanager +def augment_usage_errors( + ctx: "Context", param: t.Optional["Parameter"] = None +) -> t.Iterator[None]: + """Context manager that attaches extra information to exceptions.""" + try: + yield + except BadParameter as e: + if e.ctx is None: + e.ctx = ctx + if param is not None and e.param is None: + e.param = param + raise + except UsageError as e: + if e.ctx is None: + e.ctx = ctx + raise + + +def iter_params_for_processing( + invocation_order: t.Sequence["Parameter"], + declaration_order: t.Sequence["Parameter"], +) -> t.List["Parameter"]: + """Given a sequence of parameters in the order as should be considered + for processing and an iterable of parameters that exist, this returns + a list in the correct order as they should be processed. + """ + + def sort_key(item: "Parameter") -> t.Tuple[bool, float]: + try: + idx: float = invocation_order.index(item) + except ValueError: + idx = float("inf") + + return not item.is_eager, idx + + return sorted(declaration_order, key=sort_key) + + +class ParameterSource(enum.Enum): + """This is an :class:`~enum.Enum` that indicates the source of a + parameter's value. + + Use :meth:`click.Context.get_parameter_source` to get the + source for a parameter by name. + + .. versionchanged:: 8.0 + Use :class:`~enum.Enum` and drop the ``validate`` method. + + .. versionchanged:: 8.0 + Added the ``PROMPT`` value. + """ + + COMMANDLINE = enum.auto() + """The value was provided by the command line args.""" + ENVIRONMENT = enum.auto() + """The value was provided with an environment variable.""" + DEFAULT = enum.auto() + """Used the default specified by the parameter.""" + DEFAULT_MAP = enum.auto() + """Used a default provided by :attr:`Context.default_map`.""" + PROMPT = enum.auto() + """Used a prompt to confirm a default or provide a value.""" + + +class Context: + """The context is a special internal object that holds state relevant + for the script execution at every single level. It's normally invisible + to commands unless they opt-in to getting access to it. + + The context is useful as it can pass internal objects around and can + control special execution features such as reading data from + environment variables. + + A context can be used as context manager in which case it will call + :meth:`close` on teardown. + + :param command: the command class for this context. + :param parent: the parent context. + :param info_name: the info name for this invocation. Generally this + is the most descriptive name for the script or + command. For the toplevel script it is usually + the name of the script, for commands below it it's + the name of the script. + :param obj: an arbitrary object of user data. + :param auto_envvar_prefix: the prefix to use for automatic environment + variables. If this is `None` then reading + from environment variables is disabled. This + does not affect manually set environment + variables which are always read. + :param default_map: a dictionary (like object) with default values + for parameters. + :param terminal_width: the width of the terminal. The default is + inherit from parent context. If no context + defines the terminal width then auto + detection will be applied. + :param max_content_width: the maximum width for content rendered by + Click (this currently only affects help + pages). This defaults to 80 characters if + not overridden. In other words: even if the + terminal is larger than that, Click will not + format things wider than 80 characters by + default. In addition to that, formatters might + add some safety mapping on the right. + :param resilient_parsing: if this flag is enabled then Click will + parse without any interactivity or callback + invocation. Default values will also be + ignored. This is useful for implementing + things such as completion support. + :param allow_extra_args: if this is set to `True` then extra arguments + at the end will not raise an error and will be + kept on the context. The default is to inherit + from the command. + :param allow_interspersed_args: if this is set to `False` then options + and arguments cannot be mixed. The + default is to inherit from the command. + :param ignore_unknown_options: instructs click to ignore options it does + not know and keeps them for later + processing. + :param help_option_names: optionally a list of strings that define how + the default help parameter is named. The + default is ``['--help']``. + :param token_normalize_func: an optional function that is used to + normalize tokens (options, choices, + etc.). This for instance can be used to + implement case insensitive behavior. + :param color: controls if the terminal supports ANSI colors or not. The + default is autodetection. This is only needed if ANSI + codes are used in texts that Click prints which is by + default not the case. This for instance would affect + help output. + :param show_default: Show defaults for all options. If not set, + defaults to the value from a parent context. Overrides an + option's ``show_default`` argument. + + .. versionchanged:: 8.0 + The ``show_default`` parameter defaults to the value from the + parent context. + + .. versionchanged:: 7.1 + Added the ``show_default`` parameter. + + .. versionchanged:: 4.0 + Added the ``color``, ``ignore_unknown_options``, and + ``max_content_width`` parameters. + + .. versionchanged:: 3.0 + Added the ``allow_extra_args`` and ``allow_interspersed_args`` + parameters. + + .. versionchanged:: 2.0 + Added the ``resilient_parsing``, ``help_option_names``, and + ``token_normalize_func`` parameters. + """ + + #: The formatter class to create with :meth:`make_formatter`. + #: + #: .. versionadded:: 8.0 + formatter_class: t.Type["HelpFormatter"] = HelpFormatter + + def __init__( + self, + command: "Command", + parent: t.Optional["Context"] = None, + info_name: t.Optional[str] = None, + obj: t.Optional[t.Any] = None, + auto_envvar_prefix: t.Optional[str] = None, + default_map: t.Optional[t.Dict[str, t.Any]] = None, + terminal_width: t.Optional[int] = None, + max_content_width: t.Optional[int] = None, + resilient_parsing: bool = False, + allow_extra_args: t.Optional[bool] = None, + allow_interspersed_args: t.Optional[bool] = None, + ignore_unknown_options: t.Optional[bool] = None, + help_option_names: t.Optional[t.List[str]] = None, + token_normalize_func: t.Optional[t.Callable[[str], str]] = None, + color: t.Optional[bool] = None, + show_default: t.Optional[bool] = None, + ) -> None: + #: the parent context or `None` if none exists. + self.parent = parent + #: the :class:`Command` for this context. + self.command = command + #: the descriptive information name + self.info_name = info_name + #: Map of parameter names to their parsed values. Parameters + #: with ``expose_value=False`` are not stored. + self.params: t.Dict[str, t.Any] = {} + #: the leftover arguments. + self.args: t.List[str] = [] + #: protected arguments. These are arguments that are prepended + #: to `args` when certain parsing scenarios are encountered but + #: must be never propagated to another arguments. This is used + #: to implement nested parsing. + self.protected_args: t.List[str] = [] + + if obj is None and parent is not None: + obj = parent.obj + + #: the user object stored. + self.obj: t.Any = obj + self._meta: t.Dict[str, t.Any] = getattr(parent, "meta", {}) + + #: A dictionary (-like object) with defaults for parameters. + if ( + default_map is None + and info_name is not None + and parent is not None + and parent.default_map is not None + ): + default_map = parent.default_map.get(info_name) + + self.default_map: t.Optional[t.Dict[str, t.Any]] = default_map + + #: This flag indicates if a subcommand is going to be executed. A + #: group callback can use this information to figure out if it's + #: being executed directly or because the execution flow passes + #: onwards to a subcommand. By default it's None, but it can be + #: the name of the subcommand to execute. + #: + #: If chaining is enabled this will be set to ``'*'`` in case + #: any commands are executed. It is however not possible to + #: figure out which ones. If you require this knowledge you + #: should use a :func:`result_callback`. + self.invoked_subcommand: t.Optional[str] = None + + if terminal_width is None and parent is not None: + terminal_width = parent.terminal_width + + #: The width of the terminal (None is autodetection). + self.terminal_width: t.Optional[int] = terminal_width + + if max_content_width is None and parent is not None: + max_content_width = parent.max_content_width + + #: The maximum width of formatted content (None implies a sensible + #: default which is 80 for most things). + self.max_content_width: t.Optional[int] = max_content_width + + if allow_extra_args is None: + allow_extra_args = command.allow_extra_args + + #: Indicates if the context allows extra args or if it should + #: fail on parsing. + #: + #: .. versionadded:: 3.0 + self.allow_extra_args = allow_extra_args + + if allow_interspersed_args is None: + allow_interspersed_args = command.allow_interspersed_args + + #: Indicates if the context allows mixing of arguments and + #: options or not. + #: + #: .. versionadded:: 3.0 + self.allow_interspersed_args: bool = allow_interspersed_args + + if ignore_unknown_options is None: + ignore_unknown_options = command.ignore_unknown_options + + #: Instructs click to ignore options that a command does not + #: understand and will store it on the context for later + #: processing. This is primarily useful for situations where you + #: want to call into external programs. Generally this pattern is + #: strongly discouraged because it's not possibly to losslessly + #: forward all arguments. + #: + #: .. versionadded:: 4.0 + self.ignore_unknown_options: bool = ignore_unknown_options + + if help_option_names is None: + if parent is not None: + help_option_names = parent.help_option_names + else: + help_option_names = ["--help"] + + #: The names for the help options. + self.help_option_names: t.List[str] = help_option_names + + if token_normalize_func is None and parent is not None: + token_normalize_func = parent.token_normalize_func + + #: An optional normalization function for tokens. This is + #: options, choices, commands etc. + self.token_normalize_func: t.Optional[ + t.Callable[[str], str] + ] = token_normalize_func + + #: Indicates if resilient parsing is enabled. In that case Click + #: will do its best to not cause any failures and default values + #: will be ignored. Useful for completion. + self.resilient_parsing: bool = resilient_parsing + + # If there is no envvar prefix yet, but the parent has one and + # the command on this level has a name, we can expand the envvar + # prefix automatically. + if auto_envvar_prefix is None: + if ( + parent is not None + and parent.auto_envvar_prefix is not None + and self.info_name is not None + ): + auto_envvar_prefix = ( + f"{parent.auto_envvar_prefix}_{self.info_name.upper()}" + ) + else: + auto_envvar_prefix = auto_envvar_prefix.upper() + + if auto_envvar_prefix is not None: + auto_envvar_prefix = auto_envvar_prefix.replace("-", "_") + + self.auto_envvar_prefix: t.Optional[str] = auto_envvar_prefix + + if color is None and parent is not None: + color = parent.color + + #: Controls if styling output is wanted or not. + self.color: t.Optional[bool] = color + + if show_default is None and parent is not None: + show_default = parent.show_default + + #: Show option default values when formatting help text. + self.show_default: t.Optional[bool] = show_default + + self._close_callbacks: t.List[t.Callable[[], t.Any]] = [] + self._depth = 0 + self._parameter_source: t.Dict[str, ParameterSource] = {} + self._exit_stack = ExitStack() + + def to_info_dict(self) -> t.Dict[str, t.Any]: + """Gather information that could be useful for a tool generating + user-facing documentation. This traverses the entire CLI + structure. + + .. code-block:: python + + with Context(cli) as ctx: + info = ctx.to_info_dict() + + .. versionadded:: 8.0 + """ + return { + "command": self.command.to_info_dict(self), + "info_name": self.info_name, + "allow_extra_args": self.allow_extra_args, + "allow_interspersed_args": self.allow_interspersed_args, + "ignore_unknown_options": self.ignore_unknown_options, + "auto_envvar_prefix": self.auto_envvar_prefix, + } + + def __enter__(self) -> "Context": + self._depth += 1 + push_context(self) + return self + + def __exit__(self, exc_type, exc_value, tb): # type: ignore + self._depth -= 1 + if self._depth == 0: + self.close() + pop_context() + + @contextmanager + def scope(self, cleanup: bool = True) -> t.Iterator["Context"]: + """This helper method can be used with the context object to promote + it to the current thread local (see :func:`get_current_context`). + The default behavior of this is to invoke the cleanup functions which + can be disabled by setting `cleanup` to `False`. The cleanup + functions are typically used for things such as closing file handles. + + If the cleanup is intended the context object can also be directly + used as a context manager. + + Example usage:: + + with ctx.scope(): + assert get_current_context() is ctx + + This is equivalent:: + + with ctx: + assert get_current_context() is ctx + + .. versionadded:: 5.0 + + :param cleanup: controls if the cleanup functions should be run or + not. The default is to run these functions. In + some situations the context only wants to be + temporarily pushed in which case this can be disabled. + Nested pushes automatically defer the cleanup. + """ + if not cleanup: + self._depth += 1 + try: + with self as rv: + yield rv + finally: + if not cleanup: + self._depth -= 1 + + @property + def meta(self) -> t.Dict[str, t.Any]: + """This is a dictionary which is shared with all the contexts + that are nested. It exists so that click utilities can store some + state here if they need to. It is however the responsibility of + that code to manage this dictionary well. + + The keys are supposed to be unique dotted strings. For instance + module paths are a good choice for it. What is stored in there is + irrelevant for the operation of click. However what is important is + that code that places data here adheres to the general semantics of + the system. + + Example usage:: + + LANG_KEY = f'{__name__}.lang' + + def set_language(value): + ctx = get_current_context() + ctx.meta[LANG_KEY] = value + + def get_language(): + return get_current_context().meta.get(LANG_KEY, 'en_US') + + .. versionadded:: 5.0 + """ + return self._meta + + def make_formatter(self) -> HelpFormatter: + """Creates the :class:`~click.HelpFormatter` for the help and + usage output. + + To quickly customize the formatter class used without overriding + this method, set the :attr:`formatter_class` attribute. + + .. versionchanged:: 8.0 + Added the :attr:`formatter_class` attribute. + """ + return self.formatter_class( + width=self.terminal_width, max_width=self.max_content_width + ) + + def with_resource(self, context_manager: t.ContextManager[V]) -> V: + """Register a resource as if it were used in a ``with`` + statement. The resource will be cleaned up when the context is + popped. + + Uses :meth:`contextlib.ExitStack.enter_context`. It calls the + resource's ``__enter__()`` method and returns the result. When + the context is popped, it closes the stack, which calls the + resource's ``__exit__()`` method. + + To register a cleanup function for something that isn't a + context manager, use :meth:`call_on_close`. Or use something + from :mod:`contextlib` to turn it into a context manager first. + + .. code-block:: python + + @click.group() + @click.option("--name") + @click.pass_context + def cli(ctx): + ctx.obj = ctx.with_resource(connect_db(name)) + + :param context_manager: The context manager to enter. + :return: Whatever ``context_manager.__enter__()`` returns. + + .. versionadded:: 8.0 + """ + return self._exit_stack.enter_context(context_manager) + + def call_on_close(self, f: t.Callable[..., t.Any]) -> t.Callable[..., t.Any]: + """Register a function to be called when the context tears down. + + This can be used to close resources opened during the script + execution. Resources that support Python's context manager + protocol which would be used in a ``with`` statement should be + registered with :meth:`with_resource` instead. + + :param f: The function to execute on teardown. + """ + return self._exit_stack.callback(f) + + def close(self) -> None: + """Invoke all close callbacks registered with + :meth:`call_on_close`, and exit all context managers entered + with :meth:`with_resource`. + """ + self._exit_stack.close() + # In case the context is reused, create a new exit stack. + self._exit_stack = ExitStack() + + @property + def command_path(self) -> str: + """The computed command path. This is used for the ``usage`` + information on the help page. It's automatically created by + combining the info names of the chain of contexts to the root. + """ + rv = "" + if self.info_name is not None: + rv = self.info_name + if self.parent is not None: + parent_command_path = [self.parent.command_path] + + if isinstance(self.parent.command, Command): + for param in self.parent.command.get_params(self): + parent_command_path.extend(param.get_usage_pieces(self)) + + rv = f"{' '.join(parent_command_path)} {rv}" + return rv.lstrip() + + def find_root(self) -> "Context": + """Finds the outermost context.""" + node = self + while node.parent is not None: + node = node.parent + return node + + def find_object(self, object_type: t.Type[V]) -> t.Optional[V]: + """Finds the closest object of a given type.""" + node: t.Optional["Context"] = self + + while node is not None: + if isinstance(node.obj, object_type): + return node.obj + + node = node.parent + + return None + + def ensure_object(self, object_type: t.Type[V]) -> V: + """Like :meth:`find_object` but sets the innermost object to a + new instance of `object_type` if it does not exist. + """ + rv = self.find_object(object_type) + if rv is None: + self.obj = rv = object_type() + return rv + + @typing.overload + def lookup_default( + self, name: str, call: "te.Literal[True]" = True + ) -> t.Optional[t.Any]: + ... + + @typing.overload + def lookup_default( + self, name: str, call: "te.Literal[False]" = ... + ) -> t.Optional[t.Union[t.Any, t.Callable[[], t.Any]]]: + ... + + def lookup_default(self, name: str, call: bool = True) -> t.Optional[t.Any]: + """Get the default for a parameter from :attr:`default_map`. + + :param name: Name of the parameter. + :param call: If the default is a callable, call it. Disable to + return the callable instead. + + .. versionchanged:: 8.0 + Added the ``call`` parameter. + """ + if self.default_map is not None: + value = self.default_map.get(name) + + if call and callable(value): + return value() + + return value + + return None + + def fail(self, message: str) -> "te.NoReturn": + """Aborts the execution of the program with a specific error + message. + + :param message: the error message to fail with. + """ + raise UsageError(message, self) + + def abort(self) -> "te.NoReturn": + """Aborts the script.""" + raise Abort() + + def exit(self, code: int = 0) -> "te.NoReturn": + """Exits the application with a given exit code.""" + raise Exit(code) + + def get_usage(self) -> str: + """Helper method to get formatted usage string for the current + context and command. + """ + return self.command.get_usage(self) + + def get_help(self) -> str: + """Helper method to get formatted help page for the current + context and command. + """ + return self.command.get_help(self) + + def _make_sub_context(self, command: "Command") -> "Context": + """Create a new context of the same type as this context, but + for a new command. + + :meta private: + """ + return type(self)(command, info_name=command.name, parent=self) + + def invoke( + __self, # noqa: B902 + __callback: t.Union["Command", t.Callable[..., t.Any]], + *args: t.Any, + **kwargs: t.Any, + ) -> t.Any: + """Invokes a command callback in exactly the way it expects. There + are two ways to invoke this method: + + 1. the first argument can be a callback and all other arguments and + keyword arguments are forwarded directly to the function. + 2. the first argument is a click command object. In that case all + arguments are forwarded as well but proper click parameters + (options and click arguments) must be keyword arguments and Click + will fill in defaults. + + Note that before Click 3.2 keyword arguments were not properly filled + in against the intention of this code and no context was created. For + more information about this change and why it was done in a bugfix + release see :ref:`upgrade-to-3.2`. + + .. versionchanged:: 8.0 + All ``kwargs`` are tracked in :attr:`params` so they will be + passed if :meth:`forward` is called at multiple levels. + """ + if isinstance(__callback, Command): + other_cmd = __callback + + if other_cmd.callback is None: + raise TypeError( + "The given command does not have a callback that can be invoked." + ) + else: + __callback = other_cmd.callback + + ctx = __self._make_sub_context(other_cmd) + + for param in other_cmd.params: + if param.name not in kwargs and param.expose_value: + kwargs[param.name] = param.type_cast_value( # type: ignore + ctx, param.get_default(ctx) + ) + + # Track all kwargs as params, so that forward() will pass + # them on in subsequent calls. + ctx.params.update(kwargs) + else: + ctx = __self + + with augment_usage_errors(__self): + with ctx: + return __callback(*args, **kwargs) + + def forward( + __self, __cmd: "Command", *args: t.Any, **kwargs: t.Any # noqa: B902 + ) -> t.Any: + """Similar to :meth:`invoke` but fills in default keyword + arguments from the current context if the other command expects + it. This cannot invoke callbacks directly, only other commands. + + .. versionchanged:: 8.0 + All ``kwargs`` are tracked in :attr:`params` so they will be + passed if ``forward`` is called at multiple levels. + """ + # Can only forward to other commands, not direct callbacks. + if not isinstance(__cmd, Command): + raise TypeError("Callback is not a command.") + + for param in __self.params: + if param not in kwargs: + kwargs[param] = __self.params[param] + + return __self.invoke(__cmd, *args, **kwargs) + + def set_parameter_source(self, name: str, source: ParameterSource) -> None: + """Set the source of a parameter. This indicates the location + from which the value of the parameter was obtained. + + :param name: The name of the parameter. + :param source: A member of :class:`~click.core.ParameterSource`. + """ + self._parameter_source[name] = source + + def get_parameter_source(self, name: str) -> t.Optional[ParameterSource]: + """Get the source of a parameter. This indicates the location + from which the value of the parameter was obtained. + + This can be useful for determining when a user specified a value + on the command line that is the same as the default value. It + will be :attr:`~click.core.ParameterSource.DEFAULT` only if the + value was actually taken from the default. + + :param name: The name of the parameter. + :rtype: ParameterSource + + .. versionchanged:: 8.0 + Returns ``None`` if the parameter was not provided from any + source. + """ + return self._parameter_source.get(name) + + +class BaseCommand: + """The base command implements the minimal API contract of commands. + Most code will never use this as it does not implement a lot of useful + functionality but it can act as the direct subclass of alternative + parsing methods that do not depend on the Click parser. + + For instance, this can be used to bridge Click and other systems like + argparse or docopt. + + Because base commands do not implement a lot of the API that other + parts of Click take for granted, they are not supported for all + operations. For instance, they cannot be used with the decorators + usually and they have no built-in callback system. + + .. versionchanged:: 2.0 + Added the `context_settings` parameter. + + :param name: the name of the command to use unless a group overrides it. + :param context_settings: an optional dictionary with defaults that are + passed to the context object. + """ + + #: The context class to create with :meth:`make_context`. + #: + #: .. versionadded:: 8.0 + context_class: t.Type[Context] = Context + #: the default for the :attr:`Context.allow_extra_args` flag. + allow_extra_args = False + #: the default for the :attr:`Context.allow_interspersed_args` flag. + allow_interspersed_args = True + #: the default for the :attr:`Context.ignore_unknown_options` flag. + ignore_unknown_options = False + + def __init__( + self, + name: t.Optional[str], + context_settings: t.Optional[t.Dict[str, t.Any]] = None, + ) -> None: + #: the name the command thinks it has. Upon registering a command + #: on a :class:`Group` the group will default the command name + #: with this information. You should instead use the + #: :class:`Context`\'s :attr:`~Context.info_name` attribute. + self.name = name + + if context_settings is None: + context_settings = {} + + #: an optional dictionary with defaults passed to the context. + self.context_settings: t.Dict[str, t.Any] = context_settings + + def to_info_dict(self, ctx: Context) -> t.Dict[str, t.Any]: + """Gather information that could be useful for a tool generating + user-facing documentation. This traverses the entire structure + below this command. + + Use :meth:`click.Context.to_info_dict` to traverse the entire + CLI structure. + + :param ctx: A :class:`Context` representing this command. + + .. versionadded:: 8.0 + """ + return {"name": self.name} + + def __repr__(self) -> str: + return f"<{self.__class__.__name__} {self.name}>" + + def get_usage(self, ctx: Context) -> str: + raise NotImplementedError("Base commands cannot get usage") + + def get_help(self, ctx: Context) -> str: + raise NotImplementedError("Base commands cannot get help") + + def make_context( + self, + info_name: t.Optional[str], + args: t.List[str], + parent: t.Optional[Context] = None, + **extra: t.Any, + ) -> Context: + """This function when given an info name and arguments will kick + off the parsing and create a new :class:`Context`. It does not + invoke the actual command callback though. + + To quickly customize the context class used without overriding + this method, set the :attr:`context_class` attribute. + + :param info_name: the info name for this invocation. Generally this + is the most descriptive name for the script or + command. For the toplevel script it's usually + the name of the script, for commands below it it's + the name of the command. + :param args: the arguments to parse as list of strings. + :param parent: the parent context if available. + :param extra: extra keyword arguments forwarded to the context + constructor. + + .. versionchanged:: 8.0 + Added the :attr:`context_class` attribute. + """ + for key, value in self.context_settings.items(): + if key not in extra: + extra[key] = value + + ctx = self.context_class( + self, info_name=info_name, parent=parent, **extra # type: ignore + ) + + with ctx.scope(cleanup=False): + self.parse_args(ctx, args) + return ctx + + def parse_args(self, ctx: Context, args: t.List[str]) -> t.List[str]: + """Given a context and a list of arguments this creates the parser + and parses the arguments, then modifies the context as necessary. + This is automatically invoked by :meth:`make_context`. + """ + raise NotImplementedError("Base commands do not know how to parse arguments.") + + def invoke(self, ctx: Context) -> t.Any: + """Given a context, this invokes the command. The default + implementation is raising a not implemented error. + """ + raise NotImplementedError("Base commands are not invokable by default") + + def shell_complete(self, ctx: Context, incomplete: str) -> t.List["CompletionItem"]: + """Return a list of completions for the incomplete value. Looks + at the names of chained multi-commands. + + Any command could be part of a chained multi-command, so sibling + commands are valid at any point during command completion. Other + command classes will return more completions. + + :param ctx: Invocation context for this command. + :param incomplete: Value being completed. May be empty. + + .. versionadded:: 8.0 + """ + from click.shell_completion import CompletionItem + + results: t.List["CompletionItem"] = [] + + while ctx.parent is not None: + ctx = ctx.parent + + if isinstance(ctx.command, MultiCommand) and ctx.command.chain: + results.extend( + CompletionItem(name, help=command.get_short_help_str()) + for name, command in _complete_visible_commands(ctx, incomplete) + if name not in ctx.protected_args + ) + + return results + + @typing.overload + def main( + self, + args: t.Optional[t.Sequence[str]] = None, + prog_name: t.Optional[str] = None, + complete_var: t.Optional[str] = None, + standalone_mode: "te.Literal[True]" = True, + **extra: t.Any, + ) -> "te.NoReturn": + ... + + @typing.overload + def main( + self, + args: t.Optional[t.Sequence[str]] = None, + prog_name: t.Optional[str] = None, + complete_var: t.Optional[str] = None, + standalone_mode: bool = ..., + **extra: t.Any, + ) -> t.Any: + ... + + def main( + self, + args: t.Optional[t.Sequence[str]] = None, + prog_name: t.Optional[str] = None, + complete_var: t.Optional[str] = None, + standalone_mode: bool = True, + windows_expand_args: bool = True, + **extra: t.Any, + ) -> t.Any: + """This is the way to invoke a script with all the bells and + whistles as a command line application. This will always terminate + the application after a call. If this is not wanted, ``SystemExit`` + needs to be caught. + + This method is also available by directly calling the instance of + a :class:`Command`. + + :param args: the arguments that should be used for parsing. If not + provided, ``sys.argv[1:]`` is used. + :param prog_name: the program name that should be used. By default + the program name is constructed by taking the file + name from ``sys.argv[0]``. + :param complete_var: the environment variable that controls the + bash completion support. The default is + ``"__COMPLETE"`` with prog_name in + uppercase. + :param standalone_mode: the default behavior is to invoke the script + in standalone mode. Click will then + handle exceptions and convert them into + error messages and the function will never + return but shut down the interpreter. If + this is set to `False` they will be + propagated to the caller and the return + value of this function is the return value + of :meth:`invoke`. + :param windows_expand_args: Expand glob patterns, user dir, and + env vars in command line args on Windows. + :param extra: extra keyword arguments are forwarded to the context + constructor. See :class:`Context` for more information. + + .. versionchanged:: 8.0.1 + Added the ``windows_expand_args`` parameter to allow + disabling command line arg expansion on Windows. + + .. versionchanged:: 8.0 + When taking arguments from ``sys.argv`` on Windows, glob + patterns, user dir, and env vars are expanded. + + .. versionchanged:: 3.0 + Added the ``standalone_mode`` parameter. + """ + # Verify that the environment is configured correctly, or reject + # further execution to avoid a broken script. + _verify_python_env() + + if args is None: + args = sys.argv[1:] + + if os.name == "nt" and windows_expand_args: + args = _expand_args(args) + else: + args = list(args) + + if prog_name is None: + prog_name = _detect_program_name() + + # Process shell completion requests and exit early. + self._main_shell_completion(extra, prog_name, complete_var) + + try: + try: + with self.make_context(prog_name, args, **extra) as ctx: + rv = self.invoke(ctx) + if not standalone_mode: + return rv + # it's not safe to `ctx.exit(rv)` here! + # note that `rv` may actually contain data like "1" which + # has obvious effects + # more subtle case: `rv=[None, None]` can come out of + # chained commands which all returned `None` -- so it's not + # even always obvious that `rv` indicates success/failure + # by its truthiness/falsiness + ctx.exit() + except (EOFError, KeyboardInterrupt): + echo(file=sys.stderr) + raise Abort() from None + except ClickException as e: + if not standalone_mode: + raise + e.show() + sys.exit(e.exit_code) + except OSError as e: + if e.errno == errno.EPIPE: + sys.stdout = t.cast(t.TextIO, PacifyFlushWrapper(sys.stdout)) + sys.stderr = t.cast(t.TextIO, PacifyFlushWrapper(sys.stderr)) + sys.exit(1) + else: + raise + except Exit as e: + if standalone_mode: + sys.exit(e.exit_code) + else: + # in non-standalone mode, return the exit code + # note that this is only reached if `self.invoke` above raises + # an Exit explicitly -- thus bypassing the check there which + # would return its result + # the results of non-standalone execution may therefore be + # somewhat ambiguous: if there are codepaths which lead to + # `ctx.exit(1)` and to `return 1`, the caller won't be able to + # tell the difference between the two + return e.exit_code + except Abort: + if not standalone_mode: + raise + echo(_("Aborted!"), file=sys.stderr) + sys.exit(1) + + def _main_shell_completion( + self, + ctx_args: t.Dict[str, t.Any], + prog_name: str, + complete_var: t.Optional[str] = None, + ) -> None: + """Check if the shell is asking for tab completion, process + that, then exit early. Called from :meth:`main` before the + program is invoked. + + :param prog_name: Name of the executable in the shell. + :param complete_var: Name of the environment variable that holds + the completion instruction. Defaults to + ``_{PROG_NAME}_COMPLETE``. + """ + if complete_var is None: + complete_var = f"_{prog_name}_COMPLETE".replace("-", "_").upper() + + instruction = os.environ.get(complete_var) + + if not instruction: + return + + from .shell_completion import shell_complete + + rv = shell_complete(self, ctx_args, prog_name, complete_var, instruction) + sys.exit(rv) + + def __call__(self, *args: t.Any, **kwargs: t.Any) -> t.Any: + """Alias for :meth:`main`.""" + return self.main(*args, **kwargs) + + +class Command(BaseCommand): + """Commands are the basic building block of command line interfaces in + Click. A basic command handles command line parsing and might dispatch + more parsing to commands nested below it. + + .. versionchanged:: 2.0 + Added the `context_settings` parameter. + .. versionchanged:: 8.0 + Added repr showing the command name + .. versionchanged:: 7.1 + Added the `no_args_is_help` parameter. + + :param name: the name of the command to use unless a group overrides it. + :param context_settings: an optional dictionary with defaults that are + passed to the context object. + :param callback: the callback to invoke. This is optional. + :param params: the parameters to register with this command. This can + be either :class:`Option` or :class:`Argument` objects. + :param help: the help string to use for this command. + :param epilog: like the help string but it's printed at the end of the + help page after everything else. + :param short_help: the short help to use for this command. This is + shown on the command listing of the parent command. + :param add_help_option: by default each command registers a ``--help`` + option. This can be disabled by this parameter. + :param no_args_is_help: this controls what happens if no arguments are + provided. This option is disabled by default. + If enabled this will add ``--help`` as argument + if no arguments are passed + :param hidden: hide this command from help outputs. + + :param deprecated: issues a message indicating that + the command is deprecated. + """ + + def __init__( + self, + name: t.Optional[str], + context_settings: t.Optional[t.Dict[str, t.Any]] = None, + callback: t.Optional[t.Callable[..., t.Any]] = None, + params: t.Optional[t.List["Parameter"]] = None, + help: t.Optional[str] = None, + epilog: t.Optional[str] = None, + short_help: t.Optional[str] = None, + options_metavar: t.Optional[str] = "[OPTIONS]", + add_help_option: bool = True, + no_args_is_help: bool = False, + hidden: bool = False, + deprecated: bool = False, + ) -> None: + super().__init__(name, context_settings) + #: the callback to execute when the command fires. This might be + #: `None` in which case nothing happens. + self.callback = callback + #: the list of parameters for this command in the order they + #: should show up in the help page and execute. Eager parameters + #: will automatically be handled before non eager ones. + self.params: t.List["Parameter"] = params or [] + + # if a form feed (page break) is found in the help text, truncate help + # text to the content preceding the first form feed + if help and "\f" in help: + help = help.split("\f", 1)[0] + + self.help = help + self.epilog = epilog + self.options_metavar = options_metavar + self.short_help = short_help + self.add_help_option = add_help_option + self.no_args_is_help = no_args_is_help + self.hidden = hidden + self.deprecated = deprecated + + def to_info_dict(self, ctx: Context) -> t.Dict[str, t.Any]: + info_dict = super().to_info_dict(ctx) + info_dict.update( + params=[param.to_info_dict() for param in self.get_params(ctx)], + help=self.help, + epilog=self.epilog, + short_help=self.short_help, + hidden=self.hidden, + deprecated=self.deprecated, + ) + return info_dict + + def get_usage(self, ctx: Context) -> str: + """Formats the usage line into a string and returns it. + + Calls :meth:`format_usage` internally. + """ + formatter = ctx.make_formatter() + self.format_usage(ctx, formatter) + return formatter.getvalue().rstrip("\n") + + def get_params(self, ctx: Context) -> t.List["Parameter"]: + rv = self.params + help_option = self.get_help_option(ctx) + + if help_option is not None: + rv = [*rv, help_option] + + return rv + + def format_usage(self, ctx: Context, formatter: HelpFormatter) -> None: + """Writes the usage line into the formatter. + + This is a low-level method called by :meth:`get_usage`. + """ + pieces = self.collect_usage_pieces(ctx) + formatter.write_usage(ctx.command_path, " ".join(pieces)) + + def collect_usage_pieces(self, ctx: Context) -> t.List[str]: + """Returns all the pieces that go into the usage line and returns + it as a list of strings. + """ + rv = [self.options_metavar] if self.options_metavar else [] + + for param in self.get_params(ctx): + rv.extend(param.get_usage_pieces(ctx)) + + return rv + + def get_help_option_names(self, ctx: Context) -> t.List[str]: + """Returns the names for the help option.""" + all_names = set(ctx.help_option_names) + for param in self.params: + all_names.difference_update(param.opts) + all_names.difference_update(param.secondary_opts) + return list(all_names) + + def get_help_option(self, ctx: Context) -> t.Optional["Option"]: + """Returns the help option object.""" + help_options = self.get_help_option_names(ctx) + + if not help_options or not self.add_help_option: + return None + + def show_help(ctx: Context, param: "Parameter", value: str) -> None: + if value and not ctx.resilient_parsing: + echo(ctx.get_help(), color=ctx.color) + ctx.exit() + + return Option( + help_options, + is_flag=True, + is_eager=True, + expose_value=False, + callback=show_help, + help=_("Show this message and exit."), + ) + + def make_parser(self, ctx: Context) -> OptionParser: + """Creates the underlying option parser for this command.""" + parser = OptionParser(ctx) + for param in self.get_params(ctx): + param.add_to_parser(parser, ctx) + return parser + + def get_help(self, ctx: Context) -> str: + """Formats the help into a string and returns it. + + Calls :meth:`format_help` internally. + """ + formatter = ctx.make_formatter() + self.format_help(ctx, formatter) + return formatter.getvalue().rstrip("\n") + + def get_short_help_str(self, limit: int = 45) -> str: + """Gets short help for the command or makes it by shortening the + long help string. + """ + text = self.short_help or "" + + if not text and self.help: + text = make_default_short_help(self.help, limit) + + if self.deprecated: + text = _("(Deprecated) {text}").format(text=text) + + return text.strip() + + def format_help(self, ctx: Context, formatter: HelpFormatter) -> None: + """Writes the help into the formatter if it exists. + + This is a low-level method called by :meth:`get_help`. + + This calls the following methods: + + - :meth:`format_usage` + - :meth:`format_help_text` + - :meth:`format_options` + - :meth:`format_epilog` + """ + self.format_usage(ctx, formatter) + self.format_help_text(ctx, formatter) + self.format_options(ctx, formatter) + self.format_epilog(ctx, formatter) + + def format_help_text(self, ctx: Context, formatter: HelpFormatter) -> None: + """Writes the help text to the formatter if it exists.""" + text = self.help or "" + + if self.deprecated: + text = _("(Deprecated) {text}").format(text=text) + + if text: + formatter.write_paragraph() + + with formatter.indentation(): + formatter.write_text(text) + + def format_options(self, ctx: Context, formatter: HelpFormatter) -> None: + """Writes all the options into the formatter if they exist.""" + opts = [] + for param in self.get_params(ctx): + rv = param.get_help_record(ctx) + if rv is not None: + opts.append(rv) + + if opts: + with formatter.section(_("Options")): + formatter.write_dl(opts) + + def format_epilog(self, ctx: Context, formatter: HelpFormatter) -> None: + """Writes the epilog into the formatter if it exists.""" + if self.epilog: + formatter.write_paragraph() + with formatter.indentation(): + formatter.write_text(self.epilog) + + def parse_args(self, ctx: Context, args: t.List[str]) -> t.List[str]: + if not args and self.no_args_is_help and not ctx.resilient_parsing: + echo(ctx.get_help(), color=ctx.color) + ctx.exit() + + parser = self.make_parser(ctx) + opts, args, param_order = parser.parse_args(args=args) + + for param in iter_params_for_processing(param_order, self.get_params(ctx)): + value, args = param.handle_parse_result(ctx, opts, args) + + if args and not ctx.allow_extra_args and not ctx.resilient_parsing: + ctx.fail( + ngettext( + "Got unexpected extra argument ({args})", + "Got unexpected extra arguments ({args})", + len(args), + ).format(args=" ".join(map(str, args))) + ) + + ctx.args = args + return args + + def invoke(self, ctx: Context) -> t.Any: + """Given a context, this invokes the attached callback (if it exists) + in the right way. + """ + if self.deprecated: + message = _( + "DeprecationWarning: The command {name!r} is deprecated." + ).format(name=self.name) + echo(style(message, fg="red"), err=True) + + if self.callback is not None: + return ctx.invoke(self.callback, **ctx.params) + + def shell_complete(self, ctx: Context, incomplete: str) -> t.List["CompletionItem"]: + """Return a list of completions for the incomplete value. Looks + at the names of options and chained multi-commands. + + :param ctx: Invocation context for this command. + :param incomplete: Value being completed. May be empty. + + .. versionadded:: 8.0 + """ + from click.shell_completion import CompletionItem + + results: t.List["CompletionItem"] = [] + + if incomplete and not incomplete[0].isalnum(): + for param in self.get_params(ctx): + if ( + not isinstance(param, Option) + or param.hidden + or ( + not param.multiple + and ctx.get_parameter_source(param.name) # type: ignore + is ParameterSource.COMMANDLINE + ) + ): + continue + + results.extend( + CompletionItem(name, help=param.help) + for name in [*param.opts, *param.secondary_opts] + if name.startswith(incomplete) + ) + + results.extend(super().shell_complete(ctx, incomplete)) + return results + + +class MultiCommand(Command): + """A multi command is the basic implementation of a command that + dispatches to subcommands. The most common version is the + :class:`Group`. + + :param invoke_without_command: this controls how the multi command itself + is invoked. By default it's only invoked + if a subcommand is provided. + :param no_args_is_help: this controls what happens if no arguments are + provided. This option is enabled by default if + `invoke_without_command` is disabled or disabled + if it's enabled. If enabled this will add + ``--help`` as argument if no arguments are + passed. + :param subcommand_metavar: the string that is used in the documentation + to indicate the subcommand place. + :param chain: if this is set to `True` chaining of multiple subcommands + is enabled. This restricts the form of commands in that + they cannot have optional arguments but it allows + multiple commands to be chained together. + :param result_callback: The result callback to attach to this multi + command. This can be set or changed later with the + :meth:`result_callback` decorator. + """ + + allow_extra_args = True + allow_interspersed_args = False + + def __init__( + self, + name: t.Optional[str] = None, + invoke_without_command: bool = False, + no_args_is_help: t.Optional[bool] = None, + subcommand_metavar: t.Optional[str] = None, + chain: bool = False, + result_callback: t.Optional[t.Callable[..., t.Any]] = None, + **attrs: t.Any, + ) -> None: + super().__init__(name, **attrs) + + if no_args_is_help is None: + no_args_is_help = not invoke_without_command + + self.no_args_is_help = no_args_is_help + self.invoke_without_command = invoke_without_command + + if subcommand_metavar is None: + if chain: + subcommand_metavar = "COMMAND1 [ARGS]... [COMMAND2 [ARGS]...]..." + else: + subcommand_metavar = "COMMAND [ARGS]..." + + self.subcommand_metavar = subcommand_metavar + self.chain = chain + # The result callback that is stored. This can be set or + # overridden with the :func:`result_callback` decorator. + self._result_callback = result_callback + + if self.chain: + for param in self.params: + if isinstance(param, Argument) and not param.required: + raise RuntimeError( + "Multi commands in chain mode cannot have" + " optional arguments." + ) + + def to_info_dict(self, ctx: Context) -> t.Dict[str, t.Any]: + info_dict = super().to_info_dict(ctx) + commands = {} + + for name in self.list_commands(ctx): + command = self.get_command(ctx, name) + + if command is None: + continue + + sub_ctx = ctx._make_sub_context(command) + + with sub_ctx.scope(cleanup=False): + commands[name] = command.to_info_dict(sub_ctx) + + info_dict.update(commands=commands, chain=self.chain) + return info_dict + + def collect_usage_pieces(self, ctx: Context) -> t.List[str]: + rv = super().collect_usage_pieces(ctx) + rv.append(self.subcommand_metavar) + return rv + + def format_options(self, ctx: Context, formatter: HelpFormatter) -> None: + super().format_options(ctx, formatter) + self.format_commands(ctx, formatter) + + def result_callback(self, replace: bool = False) -> t.Callable[[F], F]: + """Adds a result callback to the command. By default if a + result callback is already registered this will chain them but + this can be disabled with the `replace` parameter. The result + callback is invoked with the return value of the subcommand + (or the list of return values from all subcommands if chaining + is enabled) as well as the parameters as they would be passed + to the main callback. + + Example:: + + @click.group() + @click.option('-i', '--input', default=23) + def cli(input): + return 42 + + @cli.result_callback() + def process_result(result, input): + return result + input + + :param replace: if set to `True` an already existing result + callback will be removed. + + .. versionchanged:: 8.0 + Renamed from ``resultcallback``. + + .. versionadded:: 3.0 + """ + + def decorator(f: F) -> F: + old_callback = self._result_callback + + if old_callback is None or replace: + self._result_callback = f + return f + + def function(__value, *args, **kwargs): # type: ignore + inner = old_callback(__value, *args, **kwargs) # type: ignore + return f(inner, *args, **kwargs) + + self._result_callback = rv = update_wrapper(t.cast(F, function), f) + return rv + + return decorator + + def resultcallback(self, replace: bool = False) -> t.Callable[[F], F]: + import warnings + + warnings.warn( + "'resultcallback' has been renamed to 'result_callback'." + " The old name will be removed in Click 8.1.", + DeprecationWarning, + stacklevel=2, + ) + return self.result_callback(replace=replace) + + def format_commands(self, ctx: Context, formatter: HelpFormatter) -> None: + """Extra format methods for multi methods that adds all the commands + after the options. + """ + commands = [] + for subcommand in self.list_commands(ctx): + cmd = self.get_command(ctx, subcommand) + # What is this, the tool lied about a command. Ignore it + if cmd is None: + continue + if cmd.hidden: + continue + + commands.append((subcommand, cmd)) + + # allow for 3 times the default spacing + if len(commands): + limit = formatter.width - 6 - max(len(cmd[0]) for cmd in commands) + + rows = [] + for subcommand, cmd in commands: + help = cmd.get_short_help_str(limit) + rows.append((subcommand, help)) + + if rows: + with formatter.section(_("Commands")): + formatter.write_dl(rows) + + def parse_args(self, ctx: Context, args: t.List[str]) -> t.List[str]: + if not args and self.no_args_is_help and not ctx.resilient_parsing: + echo(ctx.get_help(), color=ctx.color) + ctx.exit() + + rest = super().parse_args(ctx, args) + + if self.chain: + ctx.protected_args = rest + ctx.args = [] + elif rest: + ctx.protected_args, ctx.args = rest[:1], rest[1:] + + return ctx.args + + def invoke(self, ctx: Context) -> t.Any: + def _process_result(value: t.Any) -> t.Any: + if self._result_callback is not None: + value = ctx.invoke(self._result_callback, value, **ctx.params) + return value + + if not ctx.protected_args: + if self.invoke_without_command: + # No subcommand was invoked, so the result callback is + # invoked with None for regular groups, or an empty list + # for chained groups. + with ctx: + super().invoke(ctx) + return _process_result([] if self.chain else None) + ctx.fail(_("Missing command.")) + + # Fetch args back out + args = [*ctx.protected_args, *ctx.args] + ctx.args = [] + ctx.protected_args = [] + + # If we're not in chain mode, we only allow the invocation of a + # single command but we also inform the current context about the + # name of the command to invoke. + if not self.chain: + # Make sure the context is entered so we do not clean up + # resources until the result processor has worked. + with ctx: + cmd_name, cmd, args = self.resolve_command(ctx, args) + assert cmd is not None + ctx.invoked_subcommand = cmd_name + super().invoke(ctx) + sub_ctx = cmd.make_context(cmd_name, args, parent=ctx) + with sub_ctx: + return _process_result(sub_ctx.command.invoke(sub_ctx)) + + # In chain mode we create the contexts step by step, but after the + # base command has been invoked. Because at that point we do not + # know the subcommands yet, the invoked subcommand attribute is + # set to ``*`` to inform the command that subcommands are executed + # but nothing else. + with ctx: + ctx.invoked_subcommand = "*" if args else None + super().invoke(ctx) + + # Otherwise we make every single context and invoke them in a + # chain. In that case the return value to the result processor + # is the list of all invoked subcommand's results. + contexts = [] + while args: + cmd_name, cmd, args = self.resolve_command(ctx, args) + assert cmd is not None + sub_ctx = cmd.make_context( + cmd_name, + args, + parent=ctx, + allow_extra_args=True, + allow_interspersed_args=False, + ) + contexts.append(sub_ctx) + args, sub_ctx.args = sub_ctx.args, [] + + rv = [] + for sub_ctx in contexts: + with sub_ctx: + rv.append(sub_ctx.command.invoke(sub_ctx)) + return _process_result(rv) + + def resolve_command( + self, ctx: Context, args: t.List[str] + ) -> t.Tuple[t.Optional[str], t.Optional[Command], t.List[str]]: + cmd_name = make_str(args[0]) + original_cmd_name = cmd_name + + # Get the command + cmd = self.get_command(ctx, cmd_name) + + # If we can't find the command but there is a normalization + # function available, we try with that one. + if cmd is None and ctx.token_normalize_func is not None: + cmd_name = ctx.token_normalize_func(cmd_name) + cmd = self.get_command(ctx, cmd_name) + + # If we don't find the command we want to show an error message + # to the user that it was not provided. However, there is + # something else we should do: if the first argument looks like + # an option we want to kick off parsing again for arguments to + # resolve things like --help which now should go to the main + # place. + if cmd is None and not ctx.resilient_parsing: + if split_opt(cmd_name)[0]: + self.parse_args(ctx, ctx.args) + ctx.fail(_("No such command {name!r}.").format(name=original_cmd_name)) + return cmd_name if cmd else None, cmd, args[1:] + + def get_command(self, ctx: Context, cmd_name: str) -> t.Optional[Command]: + """Given a context and a command name, this returns a + :class:`Command` object if it exists or returns `None`. + """ + raise NotImplementedError + + def list_commands(self, ctx: Context) -> t.List[str]: + """Returns a list of subcommand names in the order they should + appear. + """ + return [] + + def shell_complete(self, ctx: Context, incomplete: str) -> t.List["CompletionItem"]: + """Return a list of completions for the incomplete value. Looks + at the names of options, subcommands, and chained + multi-commands. + + :param ctx: Invocation context for this command. + :param incomplete: Value being completed. May be empty. + + .. versionadded:: 8.0 + """ + from click.shell_completion import CompletionItem + + results = [ + CompletionItem(name, help=command.get_short_help_str()) + for name, command in _complete_visible_commands(ctx, incomplete) + ] + results.extend(super().shell_complete(ctx, incomplete)) + return results + + +class Group(MultiCommand): + """A group allows a command to have subcommands attached. This is + the most common way to implement nesting in Click. + + :param name: The name of the group command. + :param commands: A dict mapping names to :class:`Command` objects. + Can also be a list of :class:`Command`, which will use + :attr:`Command.name` to create the dict. + :param attrs: Other command arguments described in + :class:`MultiCommand`, :class:`Command`, and + :class:`BaseCommand`. + + .. versionchanged:: 8.0 + The ``commmands`` argument can be a list of command objects. + """ + + #: If set, this is used by the group's :meth:`command` decorator + #: as the default :class:`Command` class. This is useful to make all + #: subcommands use a custom command class. + #: + #: .. versionadded:: 8.0 + command_class: t.Optional[t.Type[Command]] = None + + #: If set, this is used by the group's :meth:`group` decorator + #: as the default :class:`Group` class. This is useful to make all + #: subgroups use a custom group class. + #: + #: If set to the special value :class:`type` (literally + #: ``group_class = type``), this group's class will be used as the + #: default class. This makes a custom group class continue to make + #: custom groups. + #: + #: .. versionadded:: 8.0 + group_class: t.Optional[t.Union[t.Type["Group"], t.Type[type]]] = None + # Literal[type] isn't valid, so use Type[type] + + def __init__( + self, + name: t.Optional[str] = None, + commands: t.Optional[t.Union[t.Dict[str, Command], t.Sequence[Command]]] = None, + **attrs: t.Any, + ) -> None: + super().__init__(name, **attrs) + + if commands is None: + commands = {} + elif isinstance(commands, abc.Sequence): + commands = {c.name: c for c in commands if c.name is not None} + + #: The registered subcommands by their exported names. + self.commands: t.Dict[str, Command] = commands + + def add_command(self, cmd: Command, name: t.Optional[str] = None) -> None: + """Registers another :class:`Command` with this group. If the name + is not provided, the name of the command is used. + """ + name = name or cmd.name + if name is None: + raise TypeError("Command has no name.") + _check_multicommand(self, name, cmd, register=True) + self.commands[name] = cmd + + def command( + self, *args: t.Any, **kwargs: t.Any + ) -> t.Callable[[t.Callable[..., t.Any]], Command]: + """A shortcut decorator for declaring and attaching a command to + the group. This takes the same arguments as :func:`command` and + immediately registers the created command with this group by + calling :meth:`add_command`. + + To customize the command class used, set the + :attr:`command_class` attribute. + + .. versionchanged:: 8.0 + Added the :attr:`command_class` attribute. + """ + from .decorators import command + + if self.command_class is not None and "cls" not in kwargs: + kwargs["cls"] = self.command_class + + def decorator(f: t.Callable[..., t.Any]) -> Command: + cmd = command(*args, **kwargs)(f) + self.add_command(cmd) + return cmd + + return decorator + + def group( + self, *args: t.Any, **kwargs: t.Any + ) -> t.Callable[[t.Callable[..., t.Any]], "Group"]: + """A shortcut decorator for declaring and attaching a group to + the group. This takes the same arguments as :func:`group` and + immediately registers the created group with this group by + calling :meth:`add_command`. + + To customize the group class used, set the :attr:`group_class` + attribute. + + .. versionchanged:: 8.0 + Added the :attr:`group_class` attribute. + """ + from .decorators import group + + if self.group_class is not None and "cls" not in kwargs: + if self.group_class is type: + kwargs["cls"] = type(self) + else: + kwargs["cls"] = self.group_class + + def decorator(f: t.Callable[..., t.Any]) -> "Group": + cmd = group(*args, **kwargs)(f) + self.add_command(cmd) + return cmd + + return decorator + + def get_command(self, ctx: Context, cmd_name: str) -> t.Optional[Command]: + return self.commands.get(cmd_name) + + def list_commands(self, ctx: Context) -> t.List[str]: + return sorted(self.commands) + + +class CommandCollection(MultiCommand): + """A command collection is a multi command that merges multiple multi + commands together into one. This is a straightforward implementation + that accepts a list of different multi commands as sources and + provides all the commands for each of them. + """ + + def __init__( + self, + name: t.Optional[str] = None, + sources: t.Optional[t.List[MultiCommand]] = None, + **attrs: t.Any, + ) -> None: + super().__init__(name, **attrs) + #: The list of registered multi commands. + self.sources: t.List[MultiCommand] = sources or [] + + def add_source(self, multi_cmd: MultiCommand) -> None: + """Adds a new multi command to the chain dispatcher.""" + self.sources.append(multi_cmd) + + def get_command(self, ctx: Context, cmd_name: str) -> t.Optional[Command]: + for source in self.sources: + rv = source.get_command(ctx, cmd_name) + + if rv is not None: + if self.chain: + _check_multicommand(self, cmd_name, rv) + + return rv + + return None + + def list_commands(self, ctx: Context) -> t.List[str]: + rv: t.Set[str] = set() + + for source in self.sources: + rv.update(source.list_commands(ctx)) + + return sorted(rv) + + +def _check_iter(value: t.Any) -> t.Iterator[t.Any]: + """Check if the value is iterable but not a string. Raises a type + error, or return an iterator over the value. + """ + if isinstance(value, str): + raise TypeError + + return iter(value) + + +class Parameter: + r"""A parameter to a command comes in two versions: they are either + :class:`Option`\s or :class:`Argument`\s. Other subclasses are currently + not supported by design as some of the internals for parsing are + intentionally not finalized. + + Some settings are supported by both options and arguments. + + :param param_decls: the parameter declarations for this option or + argument. This is a list of flags or argument + names. + :param type: the type that should be used. Either a :class:`ParamType` + or a Python type. The later is converted into the former + automatically if supported. + :param required: controls if this is optional or not. + :param default: the default value if omitted. This can also be a callable, + in which case it's invoked when the default is needed + without any arguments. + :param callback: A function to further process or validate the value + after type conversion. It is called as ``f(ctx, param, value)`` + and must return the value. It is called for all sources, + including prompts. + :param nargs: the number of arguments to match. If not ``1`` the return + value is a tuple instead of single value. The default for + nargs is ``1`` (except if the type is a tuple, then it's + the arity of the tuple). If ``nargs=-1``, all remaining + parameters are collected. + :param metavar: how the value is represented in the help page. + :param expose_value: if this is `True` then the value is passed onwards + to the command callback and stored on the context, + otherwise it's skipped. + :param is_eager: eager values are processed before non eager ones. This + should not be set for arguments or it will inverse the + order of processing. + :param envvar: a string or list of strings that are environment variables + that should be checked. + :param shell_complete: A function that returns custom shell + completions. Used instead of the param's type completion if + given. Takes ``ctx, param, incomplete`` and must return a list + of :class:`~click.shell_completion.CompletionItem` or a list of + strings. + + .. versionchanged:: 8.0 + ``process_value`` validates required parameters and bounded + ``nargs``, and invokes the parameter callback before returning + the value. This allows the callback to validate prompts. + ``full_process_value`` is removed. + + .. versionchanged:: 8.0 + ``autocompletion`` is renamed to ``shell_complete`` and has new + semantics described above. The old name is deprecated and will + be removed in 8.1, until then it will be wrapped to match the + new requirements. + + .. versionchanged:: 8.0 + For ``multiple=True, nargs>1``, the default must be a list of + tuples. + + .. versionchanged:: 8.0 + Setting a default is no longer required for ``nargs>1``, it will + default to ``None``. ``multiple=True`` or ``nargs=-1`` will + default to ``()``. + + .. versionchanged:: 7.1 + Empty environment variables are ignored rather than taking the + empty string value. This makes it possible for scripts to clear + variables if they can't unset them. + + .. versionchanged:: 2.0 + Changed signature for parameter callback to also be passed the + parameter. The old callback format will still work, but it will + raise a warning to give you a chance to migrate the code easier. + """ + + param_type_name = "parameter" + + def __init__( + self, + param_decls: t.Optional[t.Sequence[str]] = None, + type: t.Optional[t.Union[types.ParamType, t.Any]] = None, + required: bool = False, + default: t.Optional[t.Union[t.Any, t.Callable[[], t.Any]]] = None, + callback: t.Optional[t.Callable[[Context, "Parameter", t.Any], t.Any]] = None, + nargs: t.Optional[int] = None, + multiple: bool = False, + metavar: t.Optional[str] = None, + expose_value: bool = True, + is_eager: bool = False, + envvar: t.Optional[t.Union[str, t.Sequence[str]]] = None, + shell_complete: t.Optional[ + t.Callable[ + [Context, "Parameter", str], + t.Union[t.List["CompletionItem"], t.List[str]], + ] + ] = None, + autocompletion: t.Optional[ + t.Callable[ + [Context, t.List[str], str], t.List[t.Union[t.Tuple[str, str], str]] + ] + ] = None, + ) -> None: + self.name, self.opts, self.secondary_opts = self._parse_decls( + param_decls or (), expose_value + ) + self.type = types.convert_type(type, default) + + # Default nargs to what the type tells us if we have that + # information available. + if nargs is None: + if self.type.is_composite: + nargs = self.type.arity + else: + nargs = 1 + + self.required = required + self.callback = callback + self.nargs = nargs + self.multiple = multiple + self.expose_value = expose_value + self.default = default + self.is_eager = is_eager + self.metavar = metavar + self.envvar = envvar + + if autocompletion is not None: + import warnings + + warnings.warn( + "'autocompletion' is renamed to 'shell_complete'. The old name is" + " deprecated and will be removed in Click 8.1. See the docs about" + " 'Parameter' for information about new behavior.", + DeprecationWarning, + stacklevel=2, + ) + + def shell_complete( + ctx: Context, param: "Parameter", incomplete: str + ) -> t.List["CompletionItem"]: + from click.shell_completion import CompletionItem + + out = [] + + for c in autocompletion(ctx, [], incomplete): # type: ignore + if isinstance(c, tuple): + c = CompletionItem(c[0], help=c[1]) + elif isinstance(c, str): + c = CompletionItem(c) + + if c.value.startswith(incomplete): + out.append(c) + + return out + + self._custom_shell_complete = shell_complete + + if __debug__: + if self.type.is_composite and nargs != self.type.arity: + raise ValueError( + f"'nargs' must be {self.type.arity} (or None) for" + f" type {self.type!r}, but it was {nargs}." + ) + + # Skip no default or callable default. + check_default = default if not callable(default) else None + + if check_default is not None: + if multiple: + try: + # Only check the first value against nargs. + check_default = next(_check_iter(check_default), None) + except TypeError: + raise ValueError( + "'default' must be a list when 'multiple' is true." + ) from None + + # Can be None for multiple with empty default. + if nargs != 1 and check_default is not None: + try: + _check_iter(check_default) + except TypeError: + if multiple: + message = ( + "'default' must be a list of lists when 'multiple' is" + " true and 'nargs' != 1." + ) + else: + message = "'default' must be a list when 'nargs' != 1." + + raise ValueError(message) from None + + if nargs > 1 and len(check_default) != nargs: + subject = "item length" if multiple else "length" + raise ValueError( + f"'default' {subject} must match nargs={nargs}." + ) + + def to_info_dict(self) -> t.Dict[str, t.Any]: + """Gather information that could be useful for a tool generating + user-facing documentation. + + Use :meth:`click.Context.to_info_dict` to traverse the entire + CLI structure. + + .. versionadded:: 8.0 + """ + return { + "name": self.name, + "param_type_name": self.param_type_name, + "opts": self.opts, + "secondary_opts": self.secondary_opts, + "type": self.type.to_info_dict(), + "required": self.required, + "nargs": self.nargs, + "multiple": self.multiple, + "default": self.default, + "envvar": self.envvar, + } + + def __repr__(self) -> str: + return f"<{self.__class__.__name__} {self.name}>" + + def _parse_decls( + self, decls: t.Sequence[str], expose_value: bool + ) -> t.Tuple[t.Optional[str], t.List[str], t.List[str]]: + raise NotImplementedError() + + @property + def human_readable_name(self) -> str: + """Returns the human readable name of this parameter. This is the + same as the name for options, but the metavar for arguments. + """ + return self.name # type: ignore + + def make_metavar(self) -> str: + if self.metavar is not None: + return self.metavar + + metavar = self.type.get_metavar(self) + + if metavar is None: + metavar = self.type.name.upper() + + if self.nargs != 1: + metavar += "..." + + return metavar + + @typing.overload + def get_default( + self, ctx: Context, call: "te.Literal[True]" = True + ) -> t.Optional[t.Any]: + ... + + @typing.overload + def get_default( + self, ctx: Context, call: bool = ... + ) -> t.Optional[t.Union[t.Any, t.Callable[[], t.Any]]]: + ... + + def get_default( + self, ctx: Context, call: bool = True + ) -> t.Optional[t.Union[t.Any, t.Callable[[], t.Any]]]: + """Get the default for the parameter. Tries + :meth:`Context.lookup_default` first, then the local default. + + :param ctx: Current context. + :param call: If the default is a callable, call it. Disable to + return the callable instead. + + .. versionchanged:: 8.0.2 + Type casting is no longer performed when getting a default. + + .. versionchanged:: 8.0.1 + Type casting can fail in resilient parsing mode. Invalid + defaults will not prevent showing help text. + + .. versionchanged:: 8.0 + Looks at ``ctx.default_map`` first. + + .. versionchanged:: 8.0 + Added the ``call`` parameter. + """ + value = ctx.lookup_default(self.name, call=False) # type: ignore + + if value is None: + value = self.default + + if call and callable(value): + value = value() + + return value + + def add_to_parser(self, parser: OptionParser, ctx: Context) -> None: + raise NotImplementedError() + + def consume_value( + self, ctx: Context, opts: t.Mapping[str, t.Any] + ) -> t.Tuple[t.Any, ParameterSource]: + value = opts.get(self.name) # type: ignore + source = ParameterSource.COMMANDLINE + + if value is None: + value = self.value_from_envvar(ctx) + source = ParameterSource.ENVIRONMENT + + if value is None: + value = ctx.lookup_default(self.name) # type: ignore + source = ParameterSource.DEFAULT_MAP + + if value is None: + value = self.get_default(ctx) + source = ParameterSource.DEFAULT + + return value, source + + def type_cast_value(self, ctx: Context, value: t.Any) -> t.Any: + """Convert and validate a value against the option's + :attr:`type`, :attr:`multiple`, and :attr:`nargs`. + """ + if value is None: + return () if self.multiple or self.nargs == -1 else None + + def check_iter(value: t.Any) -> t.Iterator: + try: + return _check_iter(value) + except TypeError: + # This should only happen when passing in args manually, + # the parser should construct an iterable when parsing + # the command line. + raise BadParameter( + _("Value must be an iterable."), ctx=ctx, param=self + ) from None + + if self.nargs == 1 or self.type.is_composite: + convert: t.Callable[[t.Any], t.Any] = partial( + self.type, param=self, ctx=ctx + ) + elif self.nargs == -1: + + def convert(value: t.Any) -> t.Tuple: + return tuple(self.type(x, self, ctx) for x in check_iter(value)) + + else: # nargs > 1 + + def convert(value: t.Any) -> t.Tuple: + value = tuple(check_iter(value)) + + if len(value) != self.nargs: + raise BadParameter( + ngettext( + "Takes {nargs} values but 1 was given.", + "Takes {nargs} values but {len} were given.", + len(value), + ).format(nargs=self.nargs, len=len(value)), + ctx=ctx, + param=self, + ) + + return tuple(self.type(x, self, ctx) for x in value) + + if self.multiple: + return tuple(convert(x) for x in check_iter(value)) + + return convert(value) + + def value_is_missing(self, value: t.Any) -> bool: + if value is None: + return True + + if (self.nargs != 1 or self.multiple) and value == (): + return True + + return False + + def process_value(self, ctx: Context, value: t.Any) -> t.Any: + value = self.type_cast_value(ctx, value) + + if self.required and self.value_is_missing(value): + raise MissingParameter(ctx=ctx, param=self) + + if self.callback is not None: + value = self.callback(ctx, self, value) + + return value + + def resolve_envvar_value(self, ctx: Context) -> t.Optional[str]: + if self.envvar is None: + return None + + if isinstance(self.envvar, str): + rv = os.environ.get(self.envvar) + + if rv: + return rv + else: + for envvar in self.envvar: + rv = os.environ.get(envvar) + + if rv: + return rv + + return None + + def value_from_envvar(self, ctx: Context) -> t.Optional[t.Any]: + rv: t.Optional[t.Any] = self.resolve_envvar_value(ctx) + + if rv is not None and self.nargs != 1: + rv = self.type.split_envvar_value(rv) + + return rv + + def handle_parse_result( + self, ctx: Context, opts: t.Mapping[str, t.Any], args: t.List[str] + ) -> t.Tuple[t.Any, t.List[str]]: + with augment_usage_errors(ctx, param=self): + value, source = self.consume_value(ctx, opts) + ctx.set_parameter_source(self.name, source) # type: ignore + + try: + value = self.process_value(ctx, value) + except Exception: + if not ctx.resilient_parsing: + raise + + value = None + + if self.expose_value: + ctx.params[self.name] = value # type: ignore + + return value, args + + def get_help_record(self, ctx: Context) -> t.Optional[t.Tuple[str, str]]: + pass + + def get_usage_pieces(self, ctx: Context) -> t.List[str]: + return [] + + def get_error_hint(self, ctx: Context) -> str: + """Get a stringified version of the param for use in error messages to + indicate which param caused the error. + """ + hint_list = self.opts or [self.human_readable_name] + return " / ".join(f"'{x}'" for x in hint_list) + + def shell_complete(self, ctx: Context, incomplete: str) -> t.List["CompletionItem"]: + """Return a list of completions for the incomplete value. If a + ``shell_complete`` function was given during init, it is used. + Otherwise, the :attr:`type` + :meth:`~click.types.ParamType.shell_complete` function is used. + + :param ctx: Invocation context for this command. + :param incomplete: Value being completed. May be empty. + + .. versionadded:: 8.0 + """ + if self._custom_shell_complete is not None: + results = self._custom_shell_complete(ctx, self, incomplete) + + if results and isinstance(results[0], str): + from click.shell_completion import CompletionItem + + results = [CompletionItem(c) for c in results] + + return t.cast(t.List["CompletionItem"], results) + + return self.type.shell_complete(ctx, self, incomplete) + + +class Option(Parameter): + """Options are usually optional values on the command line and + have some extra features that arguments don't have. + + All other parameters are passed onwards to the parameter constructor. + + :param show_default: controls if the default value should be shown on the + help page. Normally, defaults are not shown. If this + value is a string, it shows the string instead of the + value. This is particularly useful for dynamic options. + :param show_envvar: controls if an environment variable should be shown on + the help page. Normally, environment variables + are not shown. + :param prompt: if set to `True` or a non empty string then the user will be + prompted for input. If set to `True` the prompt will be the + option name capitalized. + :param confirmation_prompt: Prompt a second time to confirm the + value if it was prompted for. Can be set to a string instead of + ``True`` to customize the message. + :param prompt_required: If set to ``False``, the user will be + prompted for input only when the option was specified as a flag + without a value. + :param hide_input: if this is `True` then the input on the prompt will be + hidden from the user. This is useful for password + input. + :param is_flag: forces this option to act as a flag. The default is + auto detection. + :param flag_value: which value should be used for this flag if it's + enabled. This is set to a boolean automatically if + the option string contains a slash to mark two options. + :param multiple: if this is set to `True` then the argument is accepted + multiple times and recorded. This is similar to ``nargs`` + in how it works but supports arbitrary number of + arguments. + :param count: this flag makes an option increment an integer. + :param allow_from_autoenv: if this is enabled then the value of this + parameter will be pulled from an environment + variable in case a prefix is defined on the + context. + :param help: the help string. + :param hidden: hide this option from help outputs. + + .. versionchanged:: 8.0.1 + ``type`` is detected from ``flag_value`` if given. + """ + + param_type_name = "option" + + def __init__( + self, + param_decls: t.Optional[t.Sequence[str]] = None, + show_default: t.Union[bool, str] = False, + prompt: t.Union[bool, str] = False, + confirmation_prompt: t.Union[bool, str] = False, + prompt_required: bool = True, + hide_input: bool = False, + is_flag: t.Optional[bool] = None, + flag_value: t.Optional[t.Any] = None, + multiple: bool = False, + count: bool = False, + allow_from_autoenv: bool = True, + type: t.Optional[t.Union[types.ParamType, t.Any]] = None, + help: t.Optional[str] = None, + hidden: bool = False, + show_choices: bool = True, + show_envvar: bool = False, + **attrs: t.Any, + ) -> None: + default_is_missing = "default" not in attrs + super().__init__(param_decls, type=type, multiple=multiple, **attrs) + + if prompt is True: + if self.name is None: + raise TypeError("'name' is required with 'prompt=True'.") + + prompt_text: t.Optional[str] = self.name.replace("_", " ").capitalize() + elif prompt is False: + prompt_text = None + else: + prompt_text = t.cast(str, prompt) + + self.prompt = prompt_text + self.confirmation_prompt = confirmation_prompt + self.prompt_required = prompt_required + self.hide_input = hide_input + self.hidden = hidden + + # If prompt is enabled but not required, then the option can be + # used as a flag to indicate using prompt or flag_value. + self._flag_needs_value = self.prompt is not None and not self.prompt_required + + if is_flag is None: + if flag_value is not None: + # Implicitly a flag because flag_value was set. + is_flag = True + elif self._flag_needs_value: + # Not a flag, but when used as a flag it shows a prompt. + is_flag = False + else: + # Implicitly a flag because flag options were given. + is_flag = bool(self.secondary_opts) + elif is_flag is False and not self._flag_needs_value: + # Not a flag, and prompt is not enabled, can be used as a + # flag if flag_value is set. + self._flag_needs_value = flag_value is not None + + if is_flag and default_is_missing: + self.default: t.Union[t.Any, t.Callable[[], t.Any]] = False + + if flag_value is None: + flag_value = not self.default + + if is_flag and type is None: + # Re-guess the type from the flag value instead of the + # default. + self.type = types.convert_type(None, flag_value) + + self.is_flag: bool = is_flag + self.is_bool_flag = is_flag and isinstance(self.type, types.BoolParamType) + self.flag_value: t.Any = flag_value + + # Counting + self.count = count + if count: + if type is None: + self.type = types.IntRange(min=0) + if default_is_missing: + self.default = 0 + + self.allow_from_autoenv = allow_from_autoenv + self.help = help + self.show_default = show_default + self.show_choices = show_choices + self.show_envvar = show_envvar + + if __debug__: + if self.nargs == -1: + raise TypeError("nargs=-1 is not supported for options.") + + if self.prompt and self.is_flag and not self.is_bool_flag: + raise TypeError("'prompt' is not valid for non-boolean flag.") + + if not self.is_bool_flag and self.secondary_opts: + raise TypeError("Secondary flag is not valid for non-boolean flag.") + + if self.is_bool_flag and self.hide_input and self.prompt is not None: + raise TypeError( + "'prompt' with 'hide_input' is not valid for boolean flag." + ) + + if self.count: + if self.multiple: + raise TypeError("'count' is not valid with 'multiple'.") + + if self.is_flag: + raise TypeError("'count' is not valid with 'is_flag'.") + + def to_info_dict(self) -> t.Dict[str, t.Any]: + info_dict = super().to_info_dict() + info_dict.update( + help=self.help, + prompt=self.prompt, + is_flag=self.is_flag, + flag_value=self.flag_value, + count=self.count, + hidden=self.hidden, + ) + return info_dict + + def _parse_decls( + self, decls: t.Sequence[str], expose_value: bool + ) -> t.Tuple[t.Optional[str], t.List[str], t.List[str]]: + opts = [] + secondary_opts = [] + name = None + possible_names = [] + + for decl in decls: + if decl.isidentifier(): + if name is not None: + raise TypeError(f"Name '{name}' defined twice") + name = decl + else: + split_char = ";" if decl[:1] == "/" else "/" + if split_char in decl: + first, second = decl.split(split_char, 1) + first = first.rstrip() + if first: + possible_names.append(split_opt(first)) + opts.append(first) + second = second.lstrip() + if second: + secondary_opts.append(second.lstrip()) + if first == second: + raise ValueError( + f"Boolean option {decl!r} cannot use the" + " same flag for true/false." + ) + else: + possible_names.append(split_opt(decl)) + opts.append(decl) + + if name is None and possible_names: + possible_names.sort(key=lambda x: -len(x[0])) # group long options first + name = possible_names[0][1].replace("-", "_").lower() + if not name.isidentifier(): + name = None + + if name is None: + if not expose_value: + return None, opts, secondary_opts + raise TypeError("Could not determine name for option") + + if not opts and not secondary_opts: + raise TypeError( + f"No options defined but a name was passed ({name})." + " Did you mean to declare an argument instead? Did" + f" you mean to pass '--{name}'?" + ) + + return name, opts, secondary_opts + + def add_to_parser(self, parser: OptionParser, ctx: Context) -> None: + if self.multiple: + action = "append" + elif self.count: + action = "count" + else: + action = "store" + + if self.is_flag: + action = f"{action}_const" + + if self.is_bool_flag and self.secondary_opts: + parser.add_option( + obj=self, opts=self.opts, dest=self.name, action=action, const=True + ) + parser.add_option( + obj=self, + opts=self.secondary_opts, + dest=self.name, + action=action, + const=False, + ) + else: + parser.add_option( + obj=self, + opts=self.opts, + dest=self.name, + action=action, + const=self.flag_value, + ) + else: + parser.add_option( + obj=self, + opts=self.opts, + dest=self.name, + action=action, + nargs=self.nargs, + ) + + def get_help_record(self, ctx: Context) -> t.Optional[t.Tuple[str, str]]: + if self.hidden: + return None + + any_prefix_is_slash = False + + def _write_opts(opts: t.Sequence[str]) -> str: + nonlocal any_prefix_is_slash + + rv, any_slashes = join_options(opts) + + if any_slashes: + any_prefix_is_slash = True + + if not self.is_flag and not self.count: + rv += f" {self.make_metavar()}" + + return rv + + rv = [_write_opts(self.opts)] + + if self.secondary_opts: + rv.append(_write_opts(self.secondary_opts)) + + help = self.help or "" + extra = [] + + if self.show_envvar: + envvar = self.envvar + + if envvar is None: + if ( + self.allow_from_autoenv + and ctx.auto_envvar_prefix is not None + and self.name is not None + ): + envvar = f"{ctx.auto_envvar_prefix}_{self.name.upper()}" + + if envvar is not None: + var_str = ( + envvar + if isinstance(envvar, str) + else ", ".join(str(d) for d in envvar) + ) + extra.append(_("env var: {var}").format(var=var_str)) + + # Temporarily enable resilient parsing to avoid type casting + # failing for the default. Might be possible to extend this to + # help formatting in general. + resilient = ctx.resilient_parsing + ctx.resilient_parsing = True + + try: + default_value = self.get_default(ctx, call=False) + finally: + ctx.resilient_parsing = resilient + + show_default_is_str = isinstance(self.show_default, str) + + if show_default_is_str or ( + default_value is not None and (self.show_default or ctx.show_default) + ): + if show_default_is_str: + default_string = f"({self.show_default})" + elif isinstance(default_value, (list, tuple)): + default_string = ", ".join(str(d) for d in default_value) + elif callable(default_value): + default_string = _("(dynamic)") + elif self.is_bool_flag and self.secondary_opts: + # For boolean flags that have distinct True/False opts, + # use the opt without prefix instead of the value. + default_string = split_opt( + (self.opts if self.default else self.secondary_opts)[0] + )[1] + else: + default_string = str(default_value) + + if default_string: + extra.append(_("default: {default}").format(default=default_string)) + + if ( + isinstance(self.type, types._NumberRangeBase) + # skip count with default range type + and not (self.count and self.type.min == 0 and self.type.max is None) + ): + range_str = self.type._describe_range() + + if range_str: + extra.append(range_str) + + if self.required: + extra.append(_("required")) + + if extra: + extra_str = "; ".join(extra) + help = f"{help} [{extra_str}]" if help else f"[{extra_str}]" + + return ("; " if any_prefix_is_slash else " / ").join(rv), help + + @typing.overload + def get_default( + self, ctx: Context, call: "te.Literal[True]" = True + ) -> t.Optional[t.Any]: + ... + + @typing.overload + def get_default( + self, ctx: Context, call: bool = ... + ) -> t.Optional[t.Union[t.Any, t.Callable[[], t.Any]]]: + ... + + def get_default( + self, ctx: Context, call: bool = True + ) -> t.Optional[t.Union[t.Any, t.Callable[[], t.Any]]]: + # If we're a non boolean flag our default is more complex because + # we need to look at all flags in the same group to figure out + # if we're the the default one in which case we return the flag + # value as default. + if self.is_flag and not self.is_bool_flag: + for param in ctx.command.params: + if param.name == self.name and param.default: + return param.flag_value # type: ignore + + return None + + return super().get_default(ctx, call=call) + + def prompt_for_value(self, ctx: Context) -> t.Any: + """This is an alternative flow that can be activated in the full + value processing if a value does not exist. It will prompt the + user until a valid value exists and then returns the processed + value as result. + """ + assert self.prompt is not None + + # Calculate the default before prompting anything to be stable. + default = self.get_default(ctx) + + # If this is a prompt for a flag we need to handle this + # differently. + if self.is_bool_flag: + return confirm(self.prompt, default) + + return prompt( + self.prompt, + default=default, + type=self.type, + hide_input=self.hide_input, + show_choices=self.show_choices, + confirmation_prompt=self.confirmation_prompt, + value_proc=lambda x: self.process_value(ctx, x), + ) + + def resolve_envvar_value(self, ctx: Context) -> t.Optional[str]: + rv = super().resolve_envvar_value(ctx) + + if rv is not None: + return rv + + if ( + self.allow_from_autoenv + and ctx.auto_envvar_prefix is not None + and self.name is not None + ): + envvar = f"{ctx.auto_envvar_prefix}_{self.name.upper()}" + rv = os.environ.get(envvar) + + return rv + + def value_from_envvar(self, ctx: Context) -> t.Optional[t.Any]: + rv: t.Optional[t.Any] = self.resolve_envvar_value(ctx) + + if rv is None: + return None + + value_depth = (self.nargs != 1) + bool(self.multiple) + + if value_depth > 0: + rv = self.type.split_envvar_value(rv) + + if self.multiple and self.nargs != 1: + rv = batch(rv, self.nargs) + + return rv + + def consume_value( + self, ctx: Context, opts: t.Mapping[str, "Parameter"] + ) -> t.Tuple[t.Any, ParameterSource]: + value, source = super().consume_value(ctx, opts) + + # The parser will emit a sentinel value if the option can be + # given as a flag without a value. This is different from None + # to distinguish from the flag not being given at all. + if value is _flag_needs_value: + if self.prompt is not None and not ctx.resilient_parsing: + value = self.prompt_for_value(ctx) + source = ParameterSource.PROMPT + else: + value = self.flag_value + source = ParameterSource.COMMANDLINE + + elif ( + self.multiple + and value is not None + and any(v is _flag_needs_value for v in value) + ): + value = [self.flag_value if v is _flag_needs_value else v for v in value] + source = ParameterSource.COMMANDLINE + + # The value wasn't set, or used the param's default, prompt if + # prompting is enabled. + elif ( + source in {None, ParameterSource.DEFAULT} + and self.prompt is not None + and (self.required or self.prompt_required) + and not ctx.resilient_parsing + ): + value = self.prompt_for_value(ctx) + source = ParameterSource.PROMPT + + return value, source + + +class Argument(Parameter): + """Arguments are positional parameters to a command. They generally + provide fewer features than options but can have infinite ``nargs`` + and are required by default. + + All parameters are passed onwards to the parameter constructor. + """ + + param_type_name = "argument" + + def __init__( + self, + param_decls: t.Sequence[str], + required: t.Optional[bool] = None, + **attrs: t.Any, + ) -> None: + if required is None: + if attrs.get("default") is not None: + required = False + else: + required = attrs.get("nargs", 1) > 0 + + if "multiple" in attrs: + raise TypeError("__init__() got an unexpected keyword argument 'multiple'.") + + super().__init__(param_decls, required=required, **attrs) + + if __debug__: + if self.default is not None and self.nargs == -1: + raise TypeError("'default' is not supported for nargs=-1.") + + @property + def human_readable_name(self) -> str: + if self.metavar is not None: + return self.metavar + return self.name.upper() # type: ignore + + def make_metavar(self) -> str: + if self.metavar is not None: + return self.metavar + var = self.type.get_metavar(self) + if not var: + var = self.name.upper() # type: ignore + if not self.required: + var = f"[{var}]" + if self.nargs != 1: + var += "..." + return var + + def _parse_decls( + self, decls: t.Sequence[str], expose_value: bool + ) -> t.Tuple[t.Optional[str], t.List[str], t.List[str]]: + if not decls: + if not expose_value: + return None, [], [] + raise TypeError("Could not determine name for argument") + if len(decls) == 1: + name = arg = decls[0] + name = name.replace("-", "_").lower() + else: + raise TypeError( + "Arguments take exactly one parameter declaration, got" + f" {len(decls)}." + ) + return name, [arg], [] + + def get_usage_pieces(self, ctx: Context) -> t.List[str]: + return [self.make_metavar()] + + def get_error_hint(self, ctx: Context) -> str: + return f"'{self.make_metavar()}'" + + def add_to_parser(self, parser: OptionParser, ctx: Context) -> None: + parser.add_argument(dest=self.name, nargs=self.nargs, obj=self) diff --git a/.venv/lib/python3.6/site-packages/click/decorators.py b/.venv/lib/python3.6/site-packages/click/decorators.py new file mode 100644 index 0000000..f1cc005 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/decorators.py @@ -0,0 +1,436 @@ +import inspect +import types +import typing as t +from functools import update_wrapper +from gettext import gettext as _ + +from .core import Argument +from .core import Command +from .core import Context +from .core import Group +from .core import Option +from .core import Parameter +from .globals import get_current_context +from .utils import echo + +F = t.TypeVar("F", bound=t.Callable[..., t.Any]) +FC = t.TypeVar("FC", t.Callable[..., t.Any], Command) + + +def pass_context(f: F) -> F: + """Marks a callback as wanting to receive the current context + object as first argument. + """ + + def new_func(*args, **kwargs): # type: ignore + return f(get_current_context(), *args, **kwargs) + + return update_wrapper(t.cast(F, new_func), f) + + +def pass_obj(f: F) -> F: + """Similar to :func:`pass_context`, but only pass the object on the + context onwards (:attr:`Context.obj`). This is useful if that object + represents the state of a nested system. + """ + + def new_func(*args, **kwargs): # type: ignore + return f(get_current_context().obj, *args, **kwargs) + + return update_wrapper(t.cast(F, new_func), f) + + +def make_pass_decorator( + object_type: t.Type, ensure: bool = False +) -> "t.Callable[[F], F]": + """Given an object type this creates a decorator that will work + similar to :func:`pass_obj` but instead of passing the object of the + current context, it will find the innermost context of type + :func:`object_type`. + + This generates a decorator that works roughly like this:: + + from functools import update_wrapper + + def decorator(f): + @pass_context + def new_func(ctx, *args, **kwargs): + obj = ctx.find_object(object_type) + return ctx.invoke(f, obj, *args, **kwargs) + return update_wrapper(new_func, f) + return decorator + + :param object_type: the type of the object to pass. + :param ensure: if set to `True`, a new object will be created and + remembered on the context if it's not there yet. + """ + + def decorator(f: F) -> F: + def new_func(*args, **kwargs): # type: ignore + ctx = get_current_context() + + if ensure: + obj = ctx.ensure_object(object_type) + else: + obj = ctx.find_object(object_type) + + if obj is None: + raise RuntimeError( + "Managed to invoke callback without a context" + f" object of type {object_type.__name__!r}" + " existing." + ) + + return ctx.invoke(f, obj, *args, **kwargs) + + return update_wrapper(t.cast(F, new_func), f) + + return decorator + + +def pass_meta_key( + key: str, *, doc_description: t.Optional[str] = None +) -> "t.Callable[[F], F]": + """Create a decorator that passes a key from + :attr:`click.Context.meta` as the first argument to the decorated + function. + + :param key: Key in ``Context.meta`` to pass. + :param doc_description: Description of the object being passed, + inserted into the decorator's docstring. Defaults to "the 'key' + key from Context.meta". + + .. versionadded:: 8.0 + """ + + def decorator(f: F) -> F: + def new_func(*args, **kwargs): # type: ignore + ctx = get_current_context() + obj = ctx.meta[key] + return ctx.invoke(f, obj, *args, **kwargs) + + return update_wrapper(t.cast(F, new_func), f) + + if doc_description is None: + doc_description = f"the {key!r} key from :attr:`click.Context.meta`" + + decorator.__doc__ = ( + f"Decorator that passes {doc_description} as the first argument" + " to the decorated function." + ) + return decorator + + +def _make_command( + f: F, + name: t.Optional[str], + attrs: t.MutableMapping[str, t.Any], + cls: t.Type[Command], +) -> Command: + if isinstance(f, Command): + raise TypeError("Attempted to convert a callback into a command twice.") + + try: + params = f.__click_params__ # type: ignore + params.reverse() + del f.__click_params__ # type: ignore + except AttributeError: + params = [] + + help = attrs.get("help") + + if help is None: + help = inspect.getdoc(f) + else: + help = inspect.cleandoc(help) + + attrs["help"] = help + return cls( + name=name or f.__name__.lower().replace("_", "-"), + callback=f, + params=params, + **attrs, + ) + + +def command( + name: t.Optional[str] = None, + cls: t.Optional[t.Type[Command]] = None, + **attrs: t.Any, +) -> t.Callable[[F], Command]: + r"""Creates a new :class:`Command` and uses the decorated function as + callback. This will also automatically attach all decorated + :func:`option`\s and :func:`argument`\s as parameters to the command. + + The name of the command defaults to the name of the function with + underscores replaced by dashes. If you want to change that, you can + pass the intended name as the first argument. + + All keyword arguments are forwarded to the underlying command class. + + Once decorated the function turns into a :class:`Command` instance + that can be invoked as a command line utility or be attached to a + command :class:`Group`. + + :param name: the name of the command. This defaults to the function + name with underscores replaced by dashes. + :param cls: the command class to instantiate. This defaults to + :class:`Command`. + """ + if cls is None: + cls = Command + + def decorator(f: t.Callable[..., t.Any]) -> Command: + cmd = _make_command(f, name, attrs, cls) # type: ignore + cmd.__doc__ = f.__doc__ + return cmd + + return decorator + + +def group(name: t.Optional[str] = None, **attrs: t.Any) -> t.Callable[[F], Group]: + """Creates a new :class:`Group` with a function as callback. This + works otherwise the same as :func:`command` just that the `cls` + parameter is set to :class:`Group`. + """ + attrs.setdefault("cls", Group) + return t.cast(Group, command(name, **attrs)) + + +def _param_memo(f: FC, param: Parameter) -> None: + if isinstance(f, Command): + f.params.append(param) + else: + if not hasattr(f, "__click_params__"): + f.__click_params__ = [] # type: ignore + + f.__click_params__.append(param) # type: ignore + + +def argument(*param_decls: str, **attrs: t.Any) -> t.Callable[[FC], FC]: + """Attaches an argument to the command. All positional arguments are + passed as parameter declarations to :class:`Argument`; all keyword + arguments are forwarded unchanged (except ``cls``). + This is equivalent to creating an :class:`Argument` instance manually + and attaching it to the :attr:`Command.params` list. + + :param cls: the argument class to instantiate. This defaults to + :class:`Argument`. + """ + + def decorator(f: FC) -> FC: + ArgumentClass = attrs.pop("cls", Argument) + _param_memo(f, ArgumentClass(param_decls, **attrs)) + return f + + return decorator + + +def option(*param_decls: str, **attrs: t.Any) -> t.Callable[[FC], FC]: + """Attaches an option to the command. All positional arguments are + passed as parameter declarations to :class:`Option`; all keyword + arguments are forwarded unchanged (except ``cls``). + This is equivalent to creating an :class:`Option` instance manually + and attaching it to the :attr:`Command.params` list. + + :param cls: the option class to instantiate. This defaults to + :class:`Option`. + """ + + def decorator(f: FC) -> FC: + # Issue 926, copy attrs, so pre-defined options can re-use the same cls= + option_attrs = attrs.copy() + + if "help" in option_attrs: + option_attrs["help"] = inspect.cleandoc(option_attrs["help"]) + OptionClass = option_attrs.pop("cls", Option) + _param_memo(f, OptionClass(param_decls, **option_attrs)) + return f + + return decorator + + +def confirmation_option(*param_decls: str, **kwargs: t.Any) -> t.Callable[[FC], FC]: + """Add a ``--yes`` option which shows a prompt before continuing if + not passed. If the prompt is declined, the program will exit. + + :param param_decls: One or more option names. Defaults to the single + value ``"--yes"``. + :param kwargs: Extra arguments are passed to :func:`option`. + """ + + def callback(ctx: Context, param: Parameter, value: bool) -> None: + if not value: + ctx.abort() + + if not param_decls: + param_decls = ("--yes",) + + kwargs.setdefault("is_flag", True) + kwargs.setdefault("callback", callback) + kwargs.setdefault("expose_value", False) + kwargs.setdefault("prompt", "Do you want to continue?") + kwargs.setdefault("help", "Confirm the action without prompting.") + return option(*param_decls, **kwargs) + + +def password_option(*param_decls: str, **kwargs: t.Any) -> t.Callable[[FC], FC]: + """Add a ``--password`` option which prompts for a password, hiding + input and asking to enter the value again for confirmation. + + :param param_decls: One or more option names. Defaults to the single + value ``"--password"``. + :param kwargs: Extra arguments are passed to :func:`option`. + """ + if not param_decls: + param_decls = ("--password",) + + kwargs.setdefault("prompt", True) + kwargs.setdefault("confirmation_prompt", True) + kwargs.setdefault("hide_input", True) + return option(*param_decls, **kwargs) + + +def version_option( + version: t.Optional[str] = None, + *param_decls: str, + package_name: t.Optional[str] = None, + prog_name: t.Optional[str] = None, + message: t.Optional[str] = None, + **kwargs: t.Any, +) -> t.Callable[[FC], FC]: + """Add a ``--version`` option which immediately prints the version + number and exits the program. + + If ``version`` is not provided, Click will try to detect it using + :func:`importlib.metadata.version` to get the version for the + ``package_name``. On Python < 3.8, the ``importlib_metadata`` + backport must be installed. + + If ``package_name`` is not provided, Click will try to detect it by + inspecting the stack frames. This will be used to detect the + version, so it must match the name of the installed package. + + :param version: The version number to show. If not provided, Click + will try to detect it. + :param param_decls: One or more option names. Defaults to the single + value ``"--version"``. + :param package_name: The package name to detect the version from. If + not provided, Click will try to detect it. + :param prog_name: The name of the CLI to show in the message. If not + provided, it will be detected from the command. + :param message: The message to show. The values ``%(prog)s``, + ``%(package)s``, and ``%(version)s`` are available. Defaults to + ``"%(prog)s, version %(version)s"``. + :param kwargs: Extra arguments are passed to :func:`option`. + :raise RuntimeError: ``version`` could not be detected. + + .. versionchanged:: 8.0 + Add the ``package_name`` parameter, and the ``%(package)s`` + value for messages. + + .. versionchanged:: 8.0 + Use :mod:`importlib.metadata` instead of ``pkg_resources``. The + version is detected based on the package name, not the entry + point name. The Python package name must match the installed + package name, or be passed with ``package_name=``. + """ + if message is None: + message = _("%(prog)s, version %(version)s") + + if version is None and package_name is None: + frame = inspect.currentframe() + f_back = frame.f_back if frame is not None else None + f_globals = f_back.f_globals if f_back is not None else None + # break reference cycle + # https://docs.python.org/3/library/inspect.html#the-interpreter-stack + del frame + + if f_globals is not None: + package_name = f_globals.get("__name__") + + if package_name == "__main__": + package_name = f_globals.get("__package__") + + if package_name: + package_name = package_name.partition(".")[0] + + def callback(ctx: Context, param: Parameter, value: bool) -> None: + if not value or ctx.resilient_parsing: + return + + nonlocal prog_name + nonlocal version + + if prog_name is None: + prog_name = ctx.find_root().info_name + + if version is None and package_name is not None: + metadata: t.Optional[types.ModuleType] + + try: + from importlib import metadata # type: ignore + except ImportError: + # Python < 3.8 + import importlib_metadata as metadata # type: ignore + + try: + version = metadata.version(package_name) # type: ignore + except metadata.PackageNotFoundError: # type: ignore + raise RuntimeError( + f"{package_name!r} is not installed. Try passing" + " 'package_name' instead." + ) from None + + if version is None: + raise RuntimeError( + f"Could not determine the version for {package_name!r} automatically." + ) + + echo( + t.cast(str, message) + % {"prog": prog_name, "package": package_name, "version": version}, + color=ctx.color, + ) + ctx.exit() + + if not param_decls: + param_decls = ("--version",) + + kwargs.setdefault("is_flag", True) + kwargs.setdefault("expose_value", False) + kwargs.setdefault("is_eager", True) + kwargs.setdefault("help", _("Show the version and exit.")) + kwargs["callback"] = callback + return option(*param_decls, **kwargs) + + +def help_option(*param_decls: str, **kwargs: t.Any) -> t.Callable[[FC], FC]: + """Add a ``--help`` option which immediately prints the help page + and exits the program. + + This is usually unnecessary, as the ``--help`` option is added to + each command automatically unless ``add_help_option=False`` is + passed. + + :param param_decls: One or more option names. Defaults to the single + value ``"--help"``. + :param kwargs: Extra arguments are passed to :func:`option`. + """ + + def callback(ctx: Context, param: Parameter, value: bool) -> None: + if not value or ctx.resilient_parsing: + return + + echo(ctx.get_help(), color=ctx.color) + ctx.exit() + + if not param_decls: + param_decls = ("--help",) + + kwargs.setdefault("is_flag", True) + kwargs.setdefault("expose_value", False) + kwargs.setdefault("is_eager", True) + kwargs.setdefault("help", _("Show this message and exit.")) + kwargs["callback"] = callback + return option(*param_decls, **kwargs) diff --git a/.venv/lib/python3.6/site-packages/click/exceptions.py b/.venv/lib/python3.6/site-packages/click/exceptions.py new file mode 100644 index 0000000..9e20b3e --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/exceptions.py @@ -0,0 +1,287 @@ +import os +import typing as t +from gettext import gettext as _ +from gettext import ngettext + +from ._compat import get_text_stderr +from .utils import echo + +if t.TYPE_CHECKING: + from .core import Context + from .core import Parameter + + +def _join_param_hints( + param_hint: t.Optional[t.Union[t.Sequence[str], str]] +) -> t.Optional[str]: + if param_hint is not None and not isinstance(param_hint, str): + return " / ".join(repr(x) for x in param_hint) + + return param_hint + + +class ClickException(Exception): + """An exception that Click can handle and show to the user.""" + + #: The exit code for this exception. + exit_code = 1 + + def __init__(self, message: str) -> None: + super().__init__(message) + self.message = message + + def format_message(self) -> str: + return self.message + + def __str__(self) -> str: + return self.message + + def show(self, file: t.Optional[t.IO] = None) -> None: + if file is None: + file = get_text_stderr() + + echo(_("Error: {message}").format(message=self.format_message()), file=file) + + +class UsageError(ClickException): + """An internal exception that signals a usage error. This typically + aborts any further handling. + + :param message: the error message to display. + :param ctx: optionally the context that caused this error. Click will + fill in the context automatically in some situations. + """ + + exit_code = 2 + + def __init__(self, message: str, ctx: t.Optional["Context"] = None) -> None: + super().__init__(message) + self.ctx = ctx + self.cmd = self.ctx.command if self.ctx else None + + def show(self, file: t.Optional[t.IO] = None) -> None: + if file is None: + file = get_text_stderr() + color = None + hint = "" + if ( + self.ctx is not None + and self.ctx.command.get_help_option(self.ctx) is not None + ): + hint = _("Try '{command} {option}' for help.").format( + command=self.ctx.command_path, option=self.ctx.help_option_names[0] + ) + hint = f"{hint}\n" + if self.ctx is not None: + color = self.ctx.color + echo(f"{self.ctx.get_usage()}\n{hint}", file=file, color=color) + echo( + _("Error: {message}").format(message=self.format_message()), + file=file, + color=color, + ) + + +class BadParameter(UsageError): + """An exception that formats out a standardized error message for a + bad parameter. This is useful when thrown from a callback or type as + Click will attach contextual information to it (for instance, which + parameter it is). + + .. versionadded:: 2.0 + + :param param: the parameter object that caused this error. This can + be left out, and Click will attach this info itself + if possible. + :param param_hint: a string that shows up as parameter name. This + can be used as alternative to `param` in cases + where custom validation should happen. If it is + a string it's used as such, if it's a list then + each item is quoted and separated. + """ + + def __init__( + self, + message: str, + ctx: t.Optional["Context"] = None, + param: t.Optional["Parameter"] = None, + param_hint: t.Optional[str] = None, + ) -> None: + super().__init__(message, ctx) + self.param = param + self.param_hint = param_hint + + def format_message(self) -> str: + if self.param_hint is not None: + param_hint = self.param_hint + elif self.param is not None: + param_hint = self.param.get_error_hint(self.ctx) # type: ignore + else: + return _("Invalid value: {message}").format(message=self.message) + + return _("Invalid value for {param_hint}: {message}").format( + param_hint=_join_param_hints(param_hint), message=self.message + ) + + +class MissingParameter(BadParameter): + """Raised if click required an option or argument but it was not + provided when invoking the script. + + .. versionadded:: 4.0 + + :param param_type: a string that indicates the type of the parameter. + The default is to inherit the parameter type from + the given `param`. Valid values are ``'parameter'``, + ``'option'`` or ``'argument'``. + """ + + def __init__( + self, + message: t.Optional[str] = None, + ctx: t.Optional["Context"] = None, + param: t.Optional["Parameter"] = None, + param_hint: t.Optional[str] = None, + param_type: t.Optional[str] = None, + ) -> None: + super().__init__(message or "", ctx, param, param_hint) + self.param_type = param_type + + def format_message(self) -> str: + if self.param_hint is not None: + param_hint: t.Optional[str] = self.param_hint + elif self.param is not None: + param_hint = self.param.get_error_hint(self.ctx) # type: ignore + else: + param_hint = None + + param_hint = _join_param_hints(param_hint) + param_hint = f" {param_hint}" if param_hint else "" + + param_type = self.param_type + if param_type is None and self.param is not None: + param_type = self.param.param_type_name + + msg = self.message + if self.param is not None: + msg_extra = self.param.type.get_missing_message(self.param) + if msg_extra: + if msg: + msg += f". {msg_extra}" + else: + msg = msg_extra + + msg = f" {msg}" if msg else "" + + # Translate param_type for known types. + if param_type == "argument": + missing = _("Missing argument") + elif param_type == "option": + missing = _("Missing option") + elif param_type == "parameter": + missing = _("Missing parameter") + else: + missing = _("Missing {param_type}").format(param_type=param_type) + + return f"{missing}{param_hint}.{msg}" + + def __str__(self) -> str: + if not self.message: + param_name = self.param.name if self.param else None + return _("Missing parameter: {param_name}").format(param_name=param_name) + else: + return self.message + + +class NoSuchOption(UsageError): + """Raised if click attempted to handle an option that does not + exist. + + .. versionadded:: 4.0 + """ + + def __init__( + self, + option_name: str, + message: t.Optional[str] = None, + possibilities: t.Optional[t.Sequence[str]] = None, + ctx: t.Optional["Context"] = None, + ) -> None: + if message is None: + message = _("No such option: {name}").format(name=option_name) + + super().__init__(message, ctx) + self.option_name = option_name + self.possibilities = possibilities + + def format_message(self) -> str: + if not self.possibilities: + return self.message + + possibility_str = ", ".join(sorted(self.possibilities)) + suggest = ngettext( + "Did you mean {possibility}?", + "(Possible options: {possibilities})", + len(self.possibilities), + ).format(possibility=possibility_str, possibilities=possibility_str) + return f"{self.message} {suggest}" + + +class BadOptionUsage(UsageError): + """Raised if an option is generally supplied but the use of the option + was incorrect. This is for instance raised if the number of arguments + for an option is not correct. + + .. versionadded:: 4.0 + + :param option_name: the name of the option being used incorrectly. + """ + + def __init__( + self, option_name: str, message: str, ctx: t.Optional["Context"] = None + ) -> None: + super().__init__(message, ctx) + self.option_name = option_name + + +class BadArgumentUsage(UsageError): + """Raised if an argument is generally supplied but the use of the argument + was incorrect. This is for instance raised if the number of values + for an argument is not correct. + + .. versionadded:: 6.0 + """ + + +class FileError(ClickException): + """Raised if a file cannot be opened.""" + + def __init__(self, filename: str, hint: t.Optional[str] = None) -> None: + if hint is None: + hint = _("unknown error") + + super().__init__(hint) + self.ui_filename = os.fsdecode(filename) + self.filename = filename + + def format_message(self) -> str: + return _("Could not open file {filename!r}: {message}").format( + filename=self.ui_filename, message=self.message + ) + + +class Abort(RuntimeError): + """An internal signalling exception that signals Click to abort.""" + + +class Exit(RuntimeError): + """An exception that indicates that the application should exit with some + status code. + + :param code: the status code to exit with. + """ + + __slots__ = ("exit_code",) + + def __init__(self, code: int = 0) -> None: + self.exit_code = code diff --git a/.venv/lib/python3.6/site-packages/click/formatting.py b/.venv/lib/python3.6/site-packages/click/formatting.py new file mode 100644 index 0000000..ddd2a2f --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/formatting.py @@ -0,0 +1,301 @@ +import typing as t +from contextlib import contextmanager +from gettext import gettext as _ + +from ._compat import term_len +from .parser import split_opt + +# Can force a width. This is used by the test system +FORCED_WIDTH: t.Optional[int] = None + + +def measure_table(rows: t.Iterable[t.Tuple[str, str]]) -> t.Tuple[int, ...]: + widths: t.Dict[int, int] = {} + + for row in rows: + for idx, col in enumerate(row): + widths[idx] = max(widths.get(idx, 0), term_len(col)) + + return tuple(y for x, y in sorted(widths.items())) + + +def iter_rows( + rows: t.Iterable[t.Tuple[str, str]], col_count: int +) -> t.Iterator[t.Tuple[str, ...]]: + for row in rows: + yield row + ("",) * (col_count - len(row)) + + +def wrap_text( + text: str, + width: int = 78, + initial_indent: str = "", + subsequent_indent: str = "", + preserve_paragraphs: bool = False, +) -> str: + """A helper function that intelligently wraps text. By default, it + assumes that it operates on a single paragraph of text but if the + `preserve_paragraphs` parameter is provided it will intelligently + handle paragraphs (defined by two empty lines). + + If paragraphs are handled, a paragraph can be prefixed with an empty + line containing the ``\\b`` character (``\\x08``) to indicate that + no rewrapping should happen in that block. + + :param text: the text that should be rewrapped. + :param width: the maximum width for the text. + :param initial_indent: the initial indent that should be placed on the + first line as a string. + :param subsequent_indent: the indent string that should be placed on + each consecutive line. + :param preserve_paragraphs: if this flag is set then the wrapping will + intelligently handle paragraphs. + """ + from ._textwrap import TextWrapper + + text = text.expandtabs() + wrapper = TextWrapper( + width, + initial_indent=initial_indent, + subsequent_indent=subsequent_indent, + replace_whitespace=False, + ) + if not preserve_paragraphs: + return wrapper.fill(text) + + p: t.List[t.Tuple[int, bool, str]] = [] + buf: t.List[str] = [] + indent = None + + def _flush_par() -> None: + if not buf: + return + if buf[0].strip() == "\b": + p.append((indent or 0, True, "\n".join(buf[1:]))) + else: + p.append((indent or 0, False, " ".join(buf))) + del buf[:] + + for line in text.splitlines(): + if not line: + _flush_par() + indent = None + else: + if indent is None: + orig_len = term_len(line) + line = line.lstrip() + indent = orig_len - term_len(line) + buf.append(line) + _flush_par() + + rv = [] + for indent, raw, text in p: + with wrapper.extra_indent(" " * indent): + if raw: + rv.append(wrapper.indent_only(text)) + else: + rv.append(wrapper.fill(text)) + + return "\n\n".join(rv) + + +class HelpFormatter: + """This class helps with formatting text-based help pages. It's + usually just needed for very special internal cases, but it's also + exposed so that developers can write their own fancy outputs. + + At present, it always writes into memory. + + :param indent_increment: the additional increment for each level. + :param width: the width for the text. This defaults to the terminal + width clamped to a maximum of 78. + """ + + def __init__( + self, + indent_increment: int = 2, + width: t.Optional[int] = None, + max_width: t.Optional[int] = None, + ) -> None: + import shutil + + self.indent_increment = indent_increment + if max_width is None: + max_width = 80 + if width is None: + width = FORCED_WIDTH + if width is None: + width = max(min(shutil.get_terminal_size().columns, max_width) - 2, 50) + self.width = width + self.current_indent = 0 + self.buffer: t.List[str] = [] + + def write(self, string: str) -> None: + """Writes a unicode string into the internal buffer.""" + self.buffer.append(string) + + def indent(self) -> None: + """Increases the indentation.""" + self.current_indent += self.indent_increment + + def dedent(self) -> None: + """Decreases the indentation.""" + self.current_indent -= self.indent_increment + + def write_usage( + self, prog: str, args: str = "", prefix: t.Optional[str] = None + ) -> None: + """Writes a usage line into the buffer. + + :param prog: the program name. + :param args: whitespace separated list of arguments. + :param prefix: The prefix for the first line. Defaults to + ``"Usage: "``. + """ + if prefix is None: + prefix = f"{_('Usage:')} " + + usage_prefix = f"{prefix:>{self.current_indent}}{prog} " + text_width = self.width - self.current_indent + + if text_width >= (term_len(usage_prefix) + 20): + # The arguments will fit to the right of the prefix. + indent = " " * term_len(usage_prefix) + self.write( + wrap_text( + args, + text_width, + initial_indent=usage_prefix, + subsequent_indent=indent, + ) + ) + else: + # The prefix is too long, put the arguments on the next line. + self.write(usage_prefix) + self.write("\n") + indent = " " * (max(self.current_indent, term_len(prefix)) + 4) + self.write( + wrap_text( + args, text_width, initial_indent=indent, subsequent_indent=indent + ) + ) + + self.write("\n") + + def write_heading(self, heading: str) -> None: + """Writes a heading into the buffer.""" + self.write(f"{'':>{self.current_indent}}{heading}:\n") + + def write_paragraph(self) -> None: + """Writes a paragraph into the buffer.""" + if self.buffer: + self.write("\n") + + def write_text(self, text: str) -> None: + """Writes re-indented text into the buffer. This rewraps and + preserves paragraphs. + """ + indent = " " * self.current_indent + self.write( + wrap_text( + text, + self.width, + initial_indent=indent, + subsequent_indent=indent, + preserve_paragraphs=True, + ) + ) + self.write("\n") + + def write_dl( + self, + rows: t.Sequence[t.Tuple[str, str]], + col_max: int = 30, + col_spacing: int = 2, + ) -> None: + """Writes a definition list into the buffer. This is how options + and commands are usually formatted. + + :param rows: a list of two item tuples for the terms and values. + :param col_max: the maximum width of the first column. + :param col_spacing: the number of spaces between the first and + second column. + """ + rows = list(rows) + widths = measure_table(rows) + if len(widths) != 2: + raise TypeError("Expected two columns for definition list") + + first_col = min(widths[0], col_max) + col_spacing + + for first, second in iter_rows(rows, len(widths)): + self.write(f"{'':>{self.current_indent}}{first}") + if not second: + self.write("\n") + continue + if term_len(first) <= first_col - col_spacing: + self.write(" " * (first_col - term_len(first))) + else: + self.write("\n") + self.write(" " * (first_col + self.current_indent)) + + text_width = max(self.width - first_col - 2, 10) + wrapped_text = wrap_text(second, text_width, preserve_paragraphs=True) + lines = wrapped_text.splitlines() + + if lines: + self.write(f"{lines[0]}\n") + + for line in lines[1:]: + self.write(f"{'':>{first_col + self.current_indent}}{line}\n") + else: + self.write("\n") + + @contextmanager + def section(self, name: str) -> t.Iterator[None]: + """Helpful context manager that writes a paragraph, a heading, + and the indents. + + :param name: the section name that is written as heading. + """ + self.write_paragraph() + self.write_heading(name) + self.indent() + try: + yield + finally: + self.dedent() + + @contextmanager + def indentation(self) -> t.Iterator[None]: + """A context manager that increases the indentation.""" + self.indent() + try: + yield + finally: + self.dedent() + + def getvalue(self) -> str: + """Returns the buffer contents.""" + return "".join(self.buffer) + + +def join_options(options: t.Sequence[str]) -> t.Tuple[str, bool]: + """Given a list of option strings this joins them in the most appropriate + way and returns them in the form ``(formatted_string, + any_prefix_is_slash)`` where the second item in the tuple is a flag that + indicates if any of the option prefixes was a slash. + """ + rv = [] + any_prefix_is_slash = False + + for opt in options: + prefix = split_opt(opt)[0] + + if prefix == "/": + any_prefix_is_slash = True + + rv.append((len(prefix), opt)) + + rv.sort(key=lambda x: x[0]) + return ", ".join(x[1] for x in rv), any_prefix_is_slash diff --git a/.venv/lib/python3.6/site-packages/click/globals.py b/.venv/lib/python3.6/site-packages/click/globals.py new file mode 100644 index 0000000..a7b0c93 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/globals.py @@ -0,0 +1,69 @@ +import typing +import typing as t +from threading import local + +if t.TYPE_CHECKING: + import typing_extensions as te + from .core import Context + +_local = local() + + +@typing.overload +def get_current_context(silent: "te.Literal[False]" = False) -> "Context": + ... + + +@typing.overload +def get_current_context(silent: bool = ...) -> t.Optional["Context"]: + ... + + +def get_current_context(silent: bool = False) -> t.Optional["Context"]: + """Returns the current click context. This can be used as a way to + access the current context object from anywhere. This is a more implicit + alternative to the :func:`pass_context` decorator. This function is + primarily useful for helpers such as :func:`echo` which might be + interested in changing its behavior based on the current context. + + To push the current context, :meth:`Context.scope` can be used. + + .. versionadded:: 5.0 + + :param silent: if set to `True` the return value is `None` if no context + is available. The default behavior is to raise a + :exc:`RuntimeError`. + """ + try: + return t.cast("Context", _local.stack[-1]) + except (AttributeError, IndexError) as e: + if not silent: + raise RuntimeError("There is no active click context.") from e + + return None + + +def push_context(ctx: "Context") -> None: + """Pushes a new context to the current stack.""" + _local.__dict__.setdefault("stack", []).append(ctx) + + +def pop_context() -> None: + """Removes the top level from the stack.""" + _local.stack.pop() + + +def resolve_color_default(color: t.Optional[bool] = None) -> t.Optional[bool]: + """Internal helper to get the default value of the color flag. If a + value is passed it's returned unchanged, otherwise it's looked up from + the current context. + """ + if color is not None: + return color + + ctx = get_current_context(silent=True) + + if ctx is not None: + return ctx.color + + return None diff --git a/.venv/lib/python3.6/site-packages/click/parser.py b/.venv/lib/python3.6/site-packages/click/parser.py new file mode 100644 index 0000000..2d5a2ed --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/parser.py @@ -0,0 +1,529 @@ +""" +This module started out as largely a copy paste from the stdlib's +optparse module with the features removed that we do not need from +optparse because we implement them in Click on a higher level (for +instance type handling, help formatting and a lot more). + +The plan is to remove more and more from here over time. + +The reason this is a different module and not optparse from the stdlib +is that there are differences in 2.x and 3.x about the error messages +generated and optparse in the stdlib uses gettext for no good reason +and might cause us issues. + +Click uses parts of optparse written by Gregory P. Ward and maintained +by the Python Software Foundation. This is limited to code in parser.py. + +Copyright 2001-2006 Gregory P. Ward. All rights reserved. +Copyright 2002-2006 Python Software Foundation. All rights reserved. +""" +# This code uses parts of optparse written by Gregory P. Ward and +# maintained by the Python Software Foundation. +# Copyright 2001-2006 Gregory P. Ward +# Copyright 2002-2006 Python Software Foundation +import typing as t +from collections import deque +from gettext import gettext as _ +from gettext import ngettext + +from .exceptions import BadArgumentUsage +from .exceptions import BadOptionUsage +from .exceptions import NoSuchOption +from .exceptions import UsageError + +if t.TYPE_CHECKING: + import typing_extensions as te + from .core import Argument as CoreArgument + from .core import Context + from .core import Option as CoreOption + from .core import Parameter as CoreParameter + +V = t.TypeVar("V") + +# Sentinel value that indicates an option was passed as a flag without a +# value but is not a flag option. Option.consume_value uses this to +# prompt or use the flag_value. +_flag_needs_value = object() + + +def _unpack_args( + args: t.Sequence[str], nargs_spec: t.Sequence[int] +) -> t.Tuple[t.Sequence[t.Union[str, t.Sequence[t.Optional[str]], None]], t.List[str]]: + """Given an iterable of arguments and an iterable of nargs specifications, + it returns a tuple with all the unpacked arguments at the first index + and all remaining arguments as the second. + + The nargs specification is the number of arguments that should be consumed + or `-1` to indicate that this position should eat up all the remainders. + + Missing items are filled with `None`. + """ + args = deque(args) + nargs_spec = deque(nargs_spec) + rv: t.List[t.Union[str, t.Tuple[t.Optional[str], ...], None]] = [] + spos: t.Optional[int] = None + + def _fetch(c: "te.Deque[V]") -> t.Optional[V]: + try: + if spos is None: + return c.popleft() + else: + return c.pop() + except IndexError: + return None + + while nargs_spec: + nargs = _fetch(nargs_spec) + + if nargs is None: + continue + + if nargs == 1: + rv.append(_fetch(args)) + elif nargs > 1: + x = [_fetch(args) for _ in range(nargs)] + + # If we're reversed, we're pulling in the arguments in reverse, + # so we need to turn them around. + if spos is not None: + x.reverse() + + rv.append(tuple(x)) + elif nargs < 0: + if spos is not None: + raise TypeError("Cannot have two nargs < 0") + + spos = len(rv) + rv.append(None) + + # spos is the position of the wildcard (star). If it's not `None`, + # we fill it with the remainder. + if spos is not None: + rv[spos] = tuple(args) + args = [] + rv[spos + 1 :] = reversed(rv[spos + 1 :]) + + return tuple(rv), list(args) + + +def split_opt(opt: str) -> t.Tuple[str, str]: + first = opt[:1] + if first.isalnum(): + return "", opt + if opt[1:2] == first: + return opt[:2], opt[2:] + return first, opt[1:] + + +def normalize_opt(opt: str, ctx: t.Optional["Context"]) -> str: + if ctx is None or ctx.token_normalize_func is None: + return opt + prefix, opt = split_opt(opt) + return f"{prefix}{ctx.token_normalize_func(opt)}" + + +def split_arg_string(string: str) -> t.List[str]: + """Split an argument string as with :func:`shlex.split`, but don't + fail if the string is incomplete. Ignores a missing closing quote or + incomplete escape sequence and uses the partial token as-is. + + .. code-block:: python + + split_arg_string("example 'my file") + ["example", "my file"] + + split_arg_string("example my\\") + ["example", "my"] + + :param string: String to split. + """ + import shlex + + lex = shlex.shlex(string, posix=True) + lex.whitespace_split = True + lex.commenters = "" + out = [] + + try: + for token in lex: + out.append(token) + except ValueError: + # Raised when end-of-string is reached in an invalid state. Use + # the partial token as-is. The quote or escape character is in + # lex.state, not lex.token. + out.append(lex.token) + + return out + + +class Option: + def __init__( + self, + obj: "CoreOption", + opts: t.Sequence[str], + dest: t.Optional[str], + action: t.Optional[str] = None, + nargs: int = 1, + const: t.Optional[t.Any] = None, + ): + self._short_opts = [] + self._long_opts = [] + self.prefixes = set() + + for opt in opts: + prefix, value = split_opt(opt) + if not prefix: + raise ValueError(f"Invalid start character for option ({opt})") + self.prefixes.add(prefix[0]) + if len(prefix) == 1 and len(value) == 1: + self._short_opts.append(opt) + else: + self._long_opts.append(opt) + self.prefixes.add(prefix) + + if action is None: + action = "store" + + self.dest = dest + self.action = action + self.nargs = nargs + self.const = const + self.obj = obj + + @property + def takes_value(self) -> bool: + return self.action in ("store", "append") + + def process(self, value: str, state: "ParsingState") -> None: + if self.action == "store": + state.opts[self.dest] = value # type: ignore + elif self.action == "store_const": + state.opts[self.dest] = self.const # type: ignore + elif self.action == "append": + state.opts.setdefault(self.dest, []).append(value) # type: ignore + elif self.action == "append_const": + state.opts.setdefault(self.dest, []).append(self.const) # type: ignore + elif self.action == "count": + state.opts[self.dest] = state.opts.get(self.dest, 0) + 1 # type: ignore + else: + raise ValueError(f"unknown action '{self.action}'") + state.order.append(self.obj) + + +class Argument: + def __init__(self, obj: "CoreArgument", dest: t.Optional[str], nargs: int = 1): + self.dest = dest + self.nargs = nargs + self.obj = obj + + def process( + self, + value: t.Union[t.Optional[str], t.Sequence[t.Optional[str]]], + state: "ParsingState", + ) -> None: + if self.nargs > 1: + assert value is not None + holes = sum(1 for x in value if x is None) + if holes == len(value): + value = None + elif holes != 0: + raise BadArgumentUsage( + _("Argument {name!r} takes {nargs} values.").format( + name=self.dest, nargs=self.nargs + ) + ) + + if self.nargs == -1 and self.obj.envvar is not None and value == (): + # Replace empty tuple with None so that a value from the + # environment may be tried. + value = None + + state.opts[self.dest] = value # type: ignore + state.order.append(self.obj) + + +class ParsingState: + def __init__(self, rargs: t.List[str]) -> None: + self.opts: t.Dict[str, t.Any] = {} + self.largs: t.List[str] = [] + self.rargs = rargs + self.order: t.List["CoreParameter"] = [] + + +class OptionParser: + """The option parser is an internal class that is ultimately used to + parse options and arguments. It's modelled after optparse and brings + a similar but vastly simplified API. It should generally not be used + directly as the high level Click classes wrap it for you. + + It's not nearly as extensible as optparse or argparse as it does not + implement features that are implemented on a higher level (such as + types or defaults). + + :param ctx: optionally the :class:`~click.Context` where this parser + should go with. + """ + + def __init__(self, ctx: t.Optional["Context"] = None) -> None: + #: The :class:`~click.Context` for this parser. This might be + #: `None` for some advanced use cases. + self.ctx = ctx + #: This controls how the parser deals with interspersed arguments. + #: If this is set to `False`, the parser will stop on the first + #: non-option. Click uses this to implement nested subcommands + #: safely. + self.allow_interspersed_args = True + #: This tells the parser how to deal with unknown options. By + #: default it will error out (which is sensible), but there is a + #: second mode where it will ignore it and continue processing + #: after shifting all the unknown options into the resulting args. + self.ignore_unknown_options = False + + if ctx is not None: + self.allow_interspersed_args = ctx.allow_interspersed_args + self.ignore_unknown_options = ctx.ignore_unknown_options + + self._short_opt: t.Dict[str, Option] = {} + self._long_opt: t.Dict[str, Option] = {} + self._opt_prefixes = {"-", "--"} + self._args: t.List[Argument] = [] + + def add_option( + self, + obj: "CoreOption", + opts: t.Sequence[str], + dest: t.Optional[str], + action: t.Optional[str] = None, + nargs: int = 1, + const: t.Optional[t.Any] = None, + ) -> None: + """Adds a new option named `dest` to the parser. The destination + is not inferred (unlike with optparse) and needs to be explicitly + provided. Action can be any of ``store``, ``store_const``, + ``append``, ``append_const`` or ``count``. + + The `obj` can be used to identify the option in the order list + that is returned from the parser. + """ + opts = [normalize_opt(opt, self.ctx) for opt in opts] + option = Option(obj, opts, dest, action=action, nargs=nargs, const=const) + self._opt_prefixes.update(option.prefixes) + for opt in option._short_opts: + self._short_opt[opt] = option + for opt in option._long_opts: + self._long_opt[opt] = option + + def add_argument( + self, obj: "CoreArgument", dest: t.Optional[str], nargs: int = 1 + ) -> None: + """Adds a positional argument named `dest` to the parser. + + The `obj` can be used to identify the option in the order list + that is returned from the parser. + """ + self._args.append(Argument(obj, dest=dest, nargs=nargs)) + + def parse_args( + self, args: t.List[str] + ) -> t.Tuple[t.Dict[str, t.Any], t.List[str], t.List["CoreParameter"]]: + """Parses positional arguments and returns ``(values, args, order)`` + for the parsed options and arguments as well as the leftover + arguments if there are any. The order is a list of objects as they + appear on the command line. If arguments appear multiple times they + will be memorized multiple times as well. + """ + state = ParsingState(args) + try: + self._process_args_for_options(state) + self._process_args_for_args(state) + except UsageError: + if self.ctx is None or not self.ctx.resilient_parsing: + raise + return state.opts, state.largs, state.order + + def _process_args_for_args(self, state: ParsingState) -> None: + pargs, args = _unpack_args( + state.largs + state.rargs, [x.nargs for x in self._args] + ) + + for idx, arg in enumerate(self._args): + arg.process(pargs[idx], state) + + state.largs = args + state.rargs = [] + + def _process_args_for_options(self, state: ParsingState) -> None: + while state.rargs: + arg = state.rargs.pop(0) + arglen = len(arg) + # Double dashes always handled explicitly regardless of what + # prefixes are valid. + if arg == "--": + return + elif arg[:1] in self._opt_prefixes and arglen > 1: + self._process_opts(arg, state) + elif self.allow_interspersed_args: + state.largs.append(arg) + else: + state.rargs.insert(0, arg) + return + + # Say this is the original argument list: + # [arg0, arg1, ..., arg(i-1), arg(i), arg(i+1), ..., arg(N-1)] + # ^ + # (we are about to process arg(i)). + # + # Then rargs is [arg(i), ..., arg(N-1)] and largs is a *subset* of + # [arg0, ..., arg(i-1)] (any options and their arguments will have + # been removed from largs). + # + # The while loop will usually consume 1 or more arguments per pass. + # If it consumes 1 (eg. arg is an option that takes no arguments), + # then after _process_arg() is done the situation is: + # + # largs = subset of [arg0, ..., arg(i)] + # rargs = [arg(i+1), ..., arg(N-1)] + # + # If allow_interspersed_args is false, largs will always be + # *empty* -- still a subset of [arg0, ..., arg(i-1)], but + # not a very interesting subset! + + def _match_long_opt( + self, opt: str, explicit_value: t.Optional[str], state: ParsingState + ) -> None: + if opt not in self._long_opt: + from difflib import get_close_matches + + possibilities = get_close_matches(opt, self._long_opt) + raise NoSuchOption(opt, possibilities=possibilities, ctx=self.ctx) + + option = self._long_opt[opt] + if option.takes_value: + # At this point it's safe to modify rargs by injecting the + # explicit value, because no exception is raised in this + # branch. This means that the inserted value will be fully + # consumed. + if explicit_value is not None: + state.rargs.insert(0, explicit_value) + + value = self._get_value_from_state(opt, option, state) + + elif explicit_value is not None: + raise BadOptionUsage( + opt, _("Option {name!r} does not take a value.").format(name=opt) + ) + + else: + value = None + + option.process(value, state) + + def _match_short_opt(self, arg: str, state: ParsingState) -> None: + stop = False + i = 1 + prefix = arg[0] + unknown_options = [] + + for ch in arg[1:]: + opt = normalize_opt(f"{prefix}{ch}", self.ctx) + option = self._short_opt.get(opt) + i += 1 + + if not option: + if self.ignore_unknown_options: + unknown_options.append(ch) + continue + raise NoSuchOption(opt, ctx=self.ctx) + if option.takes_value: + # Any characters left in arg? Pretend they're the + # next arg, and stop consuming characters of arg. + if i < len(arg): + state.rargs.insert(0, arg[i:]) + stop = True + + value = self._get_value_from_state(opt, option, state) + + else: + value = None + + option.process(value, state) + + if stop: + break + + # If we got any unknown options we re-combinate the string of the + # remaining options and re-attach the prefix, then report that + # to the state as new larg. This way there is basic combinatorics + # that can be achieved while still ignoring unknown arguments. + if self.ignore_unknown_options and unknown_options: + state.largs.append(f"{prefix}{''.join(unknown_options)}") + + def _get_value_from_state( + self, option_name: str, option: Option, state: ParsingState + ) -> t.Any: + nargs = option.nargs + + if len(state.rargs) < nargs: + if option.obj._flag_needs_value: + # Option allows omitting the value. + value = _flag_needs_value + else: + raise BadOptionUsage( + option_name, + ngettext( + "Option {name!r} requires an argument.", + "Option {name!r} requires {nargs} arguments.", + nargs, + ).format(name=option_name, nargs=nargs), + ) + elif nargs == 1: + next_rarg = state.rargs[0] + + if ( + option.obj._flag_needs_value + and isinstance(next_rarg, str) + and next_rarg[:1] in self._opt_prefixes + and len(next_rarg) > 1 + ): + # The next arg looks like the start of an option, don't + # use it as the value if omitting the value is allowed. + value = _flag_needs_value + else: + value = state.rargs.pop(0) + else: + value = tuple(state.rargs[:nargs]) + del state.rargs[:nargs] + + return value + + def _process_opts(self, arg: str, state: ParsingState) -> None: + explicit_value = None + # Long option handling happens in two parts. The first part is + # supporting explicitly attached values. In any case, we will try + # to long match the option first. + if "=" in arg: + long_opt, explicit_value = arg.split("=", 1) + else: + long_opt = arg + norm_long_opt = normalize_opt(long_opt, self.ctx) + + # At this point we will match the (assumed) long option through + # the long option matching code. Note that this allows options + # like "-foo" to be matched as long options. + try: + self._match_long_opt(norm_long_opt, explicit_value, state) + except NoSuchOption: + # At this point the long option matching failed, and we need + # to try with short options. However there is a special rule + # which says, that if we have a two character options prefix + # (applies to "--foo" for instance), we do not dispatch to the + # short option code and will instead raise the no option + # error. + if arg[:2] not in self._opt_prefixes: + self._match_short_opt(arg, state) + return + + if not self.ignore_unknown_options: + raise + + state.largs.append(arg) diff --git a/.venv/lib/python3.6/site-packages/click/py.typed b/.venv/lib/python3.6/site-packages/click/py.typed new file mode 100644 index 0000000..e69de29 diff --git a/.venv/lib/python3.6/site-packages/click/shell_completion.py b/.venv/lib/python3.6/site-packages/click/shell_completion.py new file mode 100644 index 0000000..cad080d --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/shell_completion.py @@ -0,0 +1,581 @@ +import os +import re +import typing as t +from gettext import gettext as _ + +from .core import Argument +from .core import BaseCommand +from .core import Context +from .core import MultiCommand +from .core import Option +from .core import Parameter +from .core import ParameterSource +from .parser import split_arg_string +from .utils import echo + + +def shell_complete( + cli: BaseCommand, + ctx_args: t.Dict[str, t.Any], + prog_name: str, + complete_var: str, + instruction: str, +) -> int: + """Perform shell completion for the given CLI program. + + :param cli: Command being called. + :param ctx_args: Extra arguments to pass to + ``cli.make_context``. + :param prog_name: Name of the executable in the shell. + :param complete_var: Name of the environment variable that holds + the completion instruction. + :param instruction: Value of ``complete_var`` with the completion + instruction and shell, in the form ``instruction_shell``. + :return: Status code to exit with. + """ + shell, _, instruction = instruction.partition("_") + comp_cls = get_completion_class(shell) + + if comp_cls is None: + return 1 + + comp = comp_cls(cli, ctx_args, prog_name, complete_var) + + if instruction == "source": + echo(comp.source()) + return 0 + + if instruction == "complete": + echo(comp.complete()) + return 0 + + return 1 + + +class CompletionItem: + """Represents a completion value and metadata about the value. The + default metadata is ``type`` to indicate special shell handling, + and ``help`` if a shell supports showing a help string next to the + value. + + Arbitrary parameters can be passed when creating the object, and + accessed using ``item.attr``. If an attribute wasn't passed, + accessing it returns ``None``. + + :param value: The completion suggestion. + :param type: Tells the shell script to provide special completion + support for the type. Click uses ``"dir"`` and ``"file"``. + :param help: String shown next to the value if supported. + :param kwargs: Arbitrary metadata. The built-in implementations + don't use this, but custom type completions paired with custom + shell support could use it. + """ + + __slots__ = ("value", "type", "help", "_info") + + def __init__( + self, + value: t.Any, + type: str = "plain", + help: t.Optional[str] = None, + **kwargs: t.Any, + ) -> None: + self.value = value + self.type = type + self.help = help + self._info = kwargs + + def __getattr__(self, name: str) -> t.Any: + return self._info.get(name) + + +# Only Bash >= 4.4 has the nosort option. +_SOURCE_BASH = """\ +%(complete_func)s() { + local IFS=$'\\n' + local response + + response=$(env COMP_WORDS="${COMP_WORDS[*]}" COMP_CWORD=$COMP_CWORD \ +%(complete_var)s=bash_complete $1) + + for completion in $response; do + IFS=',' read type value <<< "$completion" + + if [[ $type == 'dir' ]]; then + COMREPLY=() + compopt -o dirnames + elif [[ $type == 'file' ]]; then + COMREPLY=() + compopt -o default + elif [[ $type == 'plain' ]]; then + COMPREPLY+=($value) + fi + done + + return 0 +} + +%(complete_func)s_setup() { + complete -o nosort -F %(complete_func)s %(prog_name)s +} + +%(complete_func)s_setup; +""" + +_SOURCE_ZSH = """\ +#compdef %(prog_name)s + +%(complete_func)s() { + local -a completions + local -a completions_with_descriptions + local -a response + (( ! $+commands[%(prog_name)s] )) && return 1 + + response=("${(@f)$(env COMP_WORDS="${words[*]}" COMP_CWORD=$((CURRENT-1)) \ +%(complete_var)s=zsh_complete %(prog_name)s)}") + + for type key descr in ${response}; do + if [[ "$type" == "plain" ]]; then + if [[ "$descr" == "_" ]]; then + completions+=("$key") + else + completions_with_descriptions+=("$key":"$descr") + fi + elif [[ "$type" == "dir" ]]; then + _path_files -/ + elif [[ "$type" == "file" ]]; then + _path_files -f + fi + done + + if [ -n "$completions_with_descriptions" ]; then + _describe -V unsorted completions_with_descriptions -U + fi + + if [ -n "$completions" ]; then + compadd -U -V unsorted -a completions + fi +} + +compdef %(complete_func)s %(prog_name)s; +""" + +_SOURCE_FISH = """\ +function %(complete_func)s; + set -l response; + + for value in (env %(complete_var)s=fish_complete COMP_WORDS=(commandline -cp) \ +COMP_CWORD=(commandline -t) %(prog_name)s); + set response $response $value; + end; + + for completion in $response; + set -l metadata (string split "," $completion); + + if test $metadata[1] = "dir"; + __fish_complete_directories $metadata[2]; + else if test $metadata[1] = "file"; + __fish_complete_path $metadata[2]; + else if test $metadata[1] = "plain"; + echo $metadata[2]; + end; + end; +end; + +complete --no-files --command %(prog_name)s --arguments \ +"(%(complete_func)s)"; +""" + + +class ShellComplete: + """Base class for providing shell completion support. A subclass for + a given shell will override attributes and methods to implement the + completion instructions (``source`` and ``complete``). + + :param cli: Command being called. + :param prog_name: Name of the executable in the shell. + :param complete_var: Name of the environment variable that holds + the completion instruction. + + .. versionadded:: 8.0 + """ + + name: t.ClassVar[str] + """Name to register the shell as with :func:`add_completion_class`. + This is used in completion instructions (``{name}_source`` and + ``{name}_complete``). + """ + + source_template: t.ClassVar[str] + """Completion script template formatted by :meth:`source`. This must + be provided by subclasses. + """ + + def __init__( + self, + cli: BaseCommand, + ctx_args: t.Dict[str, t.Any], + prog_name: str, + complete_var: str, + ) -> None: + self.cli = cli + self.ctx_args = ctx_args + self.prog_name = prog_name + self.complete_var = complete_var + + @property + def func_name(self) -> str: + """The name of the shell function defined by the completion + script. + """ + safe_name = re.sub(r"\W*", "", self.prog_name.replace("-", "_"), re.ASCII) + return f"_{safe_name}_completion" + + def source_vars(self) -> t.Dict[str, t.Any]: + """Vars for formatting :attr:`source_template`. + + By default this provides ``complete_func``, ``complete_var``, + and ``prog_name``. + """ + return { + "complete_func": self.func_name, + "complete_var": self.complete_var, + "prog_name": self.prog_name, + } + + def source(self) -> str: + """Produce the shell script that defines the completion + function. By default this ``%``-style formats + :attr:`source_template` with the dict returned by + :meth:`source_vars`. + """ + return self.source_template % self.source_vars() + + def get_completion_args(self) -> t.Tuple[t.List[str], str]: + """Use the env vars defined by the shell script to return a + tuple of ``args, incomplete``. This must be implemented by + subclasses. + """ + raise NotImplementedError + + def get_completions( + self, args: t.List[str], incomplete: str + ) -> t.List[CompletionItem]: + """Determine the context and last complete command or parameter + from the complete args. Call that object's ``shell_complete`` + method to get the completions for the incomplete value. + + :param args: List of complete args before the incomplete value. + :param incomplete: Value being completed. May be empty. + """ + ctx = _resolve_context(self.cli, self.ctx_args, self.prog_name, args) + obj, incomplete = _resolve_incomplete(ctx, args, incomplete) + return obj.shell_complete(ctx, incomplete) + + def format_completion(self, item: CompletionItem) -> str: + """Format a completion item into the form recognized by the + shell script. This must be implemented by subclasses. + + :param item: Completion item to format. + """ + raise NotImplementedError + + def complete(self) -> str: + """Produce the completion data to send back to the shell. + + By default this calls :meth:`get_completion_args`, gets the + completions, then calls :meth:`format_completion` for each + completion. + """ + args, incomplete = self.get_completion_args() + completions = self.get_completions(args, incomplete) + out = [self.format_completion(item) for item in completions] + return "\n".join(out) + + +class BashComplete(ShellComplete): + """Shell completion for Bash.""" + + name = "bash" + source_template = _SOURCE_BASH + + def _check_version(self) -> None: + import subprocess + + output = subprocess.run( + ["bash", "-c", "echo ${BASH_VERSION}"], stdout=subprocess.PIPE + ) + match = re.search(r"^(\d+)\.(\d+)\.\d+", output.stdout.decode()) + + if match is not None: + major, minor = match.groups() + + if major < "4" or major == "4" and minor < "4": + raise RuntimeError( + _( + "Shell completion is not supported for Bash" + " versions older than 4.4." + ) + ) + else: + raise RuntimeError( + _("Couldn't detect Bash version, shell completion is not supported.") + ) + + def source(self) -> str: + self._check_version() + return super().source() + + def get_completion_args(self) -> t.Tuple[t.List[str], str]: + cwords = split_arg_string(os.environ["COMP_WORDS"]) + cword = int(os.environ["COMP_CWORD"]) + args = cwords[1:cword] + + try: + incomplete = cwords[cword] + except IndexError: + incomplete = "" + + return args, incomplete + + def format_completion(self, item: CompletionItem) -> str: + return f"{item.type},{item.value}" + + +class ZshComplete(ShellComplete): + """Shell completion for Zsh.""" + + name = "zsh" + source_template = _SOURCE_ZSH + + def get_completion_args(self) -> t.Tuple[t.List[str], str]: + cwords = split_arg_string(os.environ["COMP_WORDS"]) + cword = int(os.environ["COMP_CWORD"]) + args = cwords[1:cword] + + try: + incomplete = cwords[cword] + except IndexError: + incomplete = "" + + return args, incomplete + + def format_completion(self, item: CompletionItem) -> str: + return f"{item.type}\n{item.value}\n{item.help if item.help else '_'}" + + +class FishComplete(ShellComplete): + """Shell completion for Fish.""" + + name = "fish" + source_template = _SOURCE_FISH + + def get_completion_args(self) -> t.Tuple[t.List[str], str]: + cwords = split_arg_string(os.environ["COMP_WORDS"]) + incomplete = os.environ["COMP_CWORD"] + args = cwords[1:] + + # Fish stores the partial word in both COMP_WORDS and + # COMP_CWORD, remove it from complete args. + if incomplete and args and args[-1] == incomplete: + args.pop() + + return args, incomplete + + def format_completion(self, item: CompletionItem) -> str: + if item.help: + return f"{item.type},{item.value}\t{item.help}" + + return f"{item.type},{item.value}" + + +_available_shells: t.Dict[str, t.Type[ShellComplete]] = { + "bash": BashComplete, + "fish": FishComplete, + "zsh": ZshComplete, +} + + +def add_completion_class( + cls: t.Type[ShellComplete], name: t.Optional[str] = None +) -> None: + """Register a :class:`ShellComplete` subclass under the given name. + The name will be provided by the completion instruction environment + variable during completion. + + :param cls: The completion class that will handle completion for the + shell. + :param name: Name to register the class under. Defaults to the + class's ``name`` attribute. + """ + if name is None: + name = cls.name + + _available_shells[name] = cls + + +def get_completion_class(shell: str) -> t.Optional[t.Type[ShellComplete]]: + """Look up a registered :class:`ShellComplete` subclass by the name + provided by the completion instruction environment variable. If the + name isn't registered, returns ``None``. + + :param shell: Name the class is registered under. + """ + return _available_shells.get(shell) + + +def _is_incomplete_argument(ctx: Context, param: Parameter) -> bool: + """Determine if the given parameter is an argument that can still + accept values. + + :param ctx: Invocation context for the command represented by the + parsed complete args. + :param param: Argument object being checked. + """ + if not isinstance(param, Argument): + return False + + assert param.name is not None + value = ctx.params[param.name] + return ( + param.nargs == -1 + or ctx.get_parameter_source(param.name) is not ParameterSource.COMMANDLINE + or ( + param.nargs > 1 + and isinstance(value, (tuple, list)) + and len(value) < param.nargs + ) + ) + + +def _start_of_option(value: str) -> bool: + """Check if the value looks like the start of an option.""" + if not value: + return False + + c = value[0] + # Allow "/" since that starts a path. + return not c.isalnum() and c != "/" + + +def _is_incomplete_option(args: t.List[str], param: Parameter) -> bool: + """Determine if the given parameter is an option that needs a value. + + :param args: List of complete args before the incomplete value. + :param param: Option object being checked. + """ + if not isinstance(param, Option): + return False + + if param.is_flag: + return False + + last_option = None + + for index, arg in enumerate(reversed(args)): + if index + 1 > param.nargs: + break + + if _start_of_option(arg): + last_option = arg + + return last_option is not None and last_option in param.opts + + +def _resolve_context( + cli: BaseCommand, ctx_args: t.Dict[str, t.Any], prog_name: str, args: t.List[str] +) -> Context: + """Produce the context hierarchy starting with the command and + traversing the complete arguments. This only follows the commands, + it doesn't trigger input prompts or callbacks. + + :param cli: Command being called. + :param prog_name: Name of the executable in the shell. + :param args: List of complete args before the incomplete value. + """ + ctx_args["resilient_parsing"] = True + ctx = cli.make_context(prog_name, args.copy(), **ctx_args) + args = ctx.protected_args + ctx.args + + while args: + command = ctx.command + + if isinstance(command, MultiCommand): + if not command.chain: + name, cmd, args = command.resolve_command(ctx, args) + + if cmd is None: + return ctx + + ctx = cmd.make_context(name, args, parent=ctx, resilient_parsing=True) + args = ctx.protected_args + ctx.args + else: + while args: + name, cmd, args = command.resolve_command(ctx, args) + + if cmd is None: + return ctx + + sub_ctx = cmd.make_context( + name, + args, + parent=ctx, + allow_extra_args=True, + allow_interspersed_args=False, + resilient_parsing=True, + ) + args = sub_ctx.args + + ctx = sub_ctx + args = [*sub_ctx.protected_args, *sub_ctx.args] + else: + break + + return ctx + + +def _resolve_incomplete( + ctx: Context, args: t.List[str], incomplete: str +) -> t.Tuple[t.Union[BaseCommand, Parameter], str]: + """Find the Click object that will handle the completion of the + incomplete value. Return the object and the incomplete value. + + :param ctx: Invocation context for the command represented by + the parsed complete args. + :param args: List of complete args before the incomplete value. + :param incomplete: Value being completed. May be empty. + """ + # Different shells treat an "=" between a long option name and + # value differently. Might keep the value joined, return the "=" + # as a separate item, or return the split name and value. Always + # split and discard the "=" to make completion easier. + if incomplete == "=": + incomplete = "" + elif "=" in incomplete and _start_of_option(incomplete): + name, _, incomplete = incomplete.partition("=") + args.append(name) + + # The "--" marker tells Click to stop treating values as options + # even if they start with the option character. If it hasn't been + # given and the incomplete arg looks like an option, the current + # command will provide option name completions. + if "--" not in args and _start_of_option(incomplete): + return ctx.command, incomplete + + params = ctx.command.get_params(ctx) + + # If the last complete arg is an option name with an incomplete + # value, the option will provide value completions. + for param in params: + if _is_incomplete_option(args, param): + return param, incomplete + + # It's not an option name or value. The first argument without a + # parsed value will provide value completions. + for param in params: + if _is_incomplete_argument(ctx, param): + return param, incomplete + + # There were no unparsed arguments, the command may be a group that + # will provide command name completions. + return ctx.command, incomplete diff --git a/.venv/lib/python3.6/site-packages/click/termui.py b/.venv/lib/python3.6/site-packages/click/termui.py new file mode 100644 index 0000000..cf8d5f1 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/termui.py @@ -0,0 +1,809 @@ +import inspect +import io +import itertools +import os +import sys +import typing +import typing as t +from gettext import gettext as _ + +from ._compat import isatty +from ._compat import strip_ansi +from ._compat import WIN +from .exceptions import Abort +from .exceptions import UsageError +from .globals import resolve_color_default +from .types import Choice +from .types import convert_type +from .types import ParamType +from .utils import echo +from .utils import LazyFile + +if t.TYPE_CHECKING: + from ._termui_impl import ProgressBar + +V = t.TypeVar("V") + +# The prompt functions to use. The doc tools currently override these +# functions to customize how they work. +visible_prompt_func: t.Callable[[str], str] = input + +_ansi_colors = { + "black": 30, + "red": 31, + "green": 32, + "yellow": 33, + "blue": 34, + "magenta": 35, + "cyan": 36, + "white": 37, + "reset": 39, + "bright_black": 90, + "bright_red": 91, + "bright_green": 92, + "bright_yellow": 93, + "bright_blue": 94, + "bright_magenta": 95, + "bright_cyan": 96, + "bright_white": 97, +} +_ansi_reset_all = "\033[0m" + + +def hidden_prompt_func(prompt: str) -> str: + import getpass + + return getpass.getpass(prompt) + + +def _build_prompt( + text: str, + suffix: str, + show_default: bool = False, + default: t.Optional[t.Any] = None, + show_choices: bool = True, + type: t.Optional[ParamType] = None, +) -> str: + prompt = text + if type is not None and show_choices and isinstance(type, Choice): + prompt += f" ({', '.join(map(str, type.choices))})" + if default is not None and show_default: + prompt = f"{prompt} [{_format_default(default)}]" + return f"{prompt}{suffix}" + + +def _format_default(default: t.Any) -> t.Any: + if isinstance(default, (io.IOBase, LazyFile)) and hasattr(default, "name"): + return default.name # type: ignore + + return default + + +def prompt( + text: str, + default: t.Optional[t.Any] = None, + hide_input: bool = False, + confirmation_prompt: t.Union[bool, str] = False, + type: t.Optional[t.Union[ParamType, t.Any]] = None, + value_proc: t.Optional[t.Callable[[str], t.Any]] = None, + prompt_suffix: str = ": ", + show_default: bool = True, + err: bool = False, + show_choices: bool = True, +) -> t.Any: + """Prompts a user for input. This is a convenience function that can + be used to prompt a user for input later. + + If the user aborts the input by sending a interrupt signal, this + function will catch it and raise a :exc:`Abort` exception. + + :param text: the text to show for the prompt. + :param default: the default value to use if no input happens. If this + is not given it will prompt until it's aborted. + :param hide_input: if this is set to true then the input value will + be hidden. + :param confirmation_prompt: Prompt a second time to confirm the + value. Can be set to a string instead of ``True`` to customize + the message. + :param type: the type to use to check the value against. + :param value_proc: if this parameter is provided it's a function that + is invoked instead of the type conversion to + convert a value. + :param prompt_suffix: a suffix that should be added to the prompt. + :param show_default: shows or hides the default value in the prompt. + :param err: if set to true the file defaults to ``stderr`` instead of + ``stdout``, the same as with echo. + :param show_choices: Show or hide choices if the passed type is a Choice. + For example if type is a Choice of either day or week, + show_choices is true and text is "Group by" then the + prompt will be "Group by (day, week): ". + + .. versionadded:: 8.0 + ``confirmation_prompt`` can be a custom string. + + .. versionadded:: 7.0 + Added the ``show_choices`` parameter. + + .. versionadded:: 6.0 + Added unicode support for cmd.exe on Windows. + + .. versionadded:: 4.0 + Added the `err` parameter. + + """ + + def prompt_func(text: str) -> str: + f = hidden_prompt_func if hide_input else visible_prompt_func + try: + # Write the prompt separately so that we get nice + # coloring through colorama on Windows + echo(text.rstrip(" "), nl=False, err=err) + # Echo a space to stdout to work around an issue where + # readline causes backspace to clear the whole line. + return f(" ") + except (KeyboardInterrupt, EOFError): + # getpass doesn't print a newline if the user aborts input with ^C. + # Allegedly this behavior is inherited from getpass(3). + # A doc bug has been filed at https://bugs.python.org/issue24711 + if hide_input: + echo(None, err=err) + raise Abort() from None + + if value_proc is None: + value_proc = convert_type(type, default) + + prompt = _build_prompt( + text, prompt_suffix, show_default, default, show_choices, type + ) + + if confirmation_prompt: + if confirmation_prompt is True: + confirmation_prompt = _("Repeat for confirmation") + + confirmation_prompt = t.cast(str, confirmation_prompt) + confirmation_prompt = _build_prompt(confirmation_prompt, prompt_suffix) + + while True: + while True: + value = prompt_func(prompt) + if value: + break + elif default is not None: + value = default + break + try: + result = value_proc(value) + except UsageError as e: + if hide_input: + echo(_("Error: The value you entered was invalid."), err=err) + else: + echo(_("Error: {e.message}").format(e=e), err=err) # noqa: B306 + continue + if not confirmation_prompt: + return result + while True: + confirmation_prompt = t.cast(str, confirmation_prompt) + value2 = prompt_func(confirmation_prompt) + if value2: + break + if value == value2: + return result + echo(_("Error: The two entered values do not match."), err=err) + + +def confirm( + text: str, + default: t.Optional[bool] = False, + abort: bool = False, + prompt_suffix: str = ": ", + show_default: bool = True, + err: bool = False, +) -> bool: + """Prompts for confirmation (yes/no question). + + If the user aborts the input by sending a interrupt signal this + function will catch it and raise a :exc:`Abort` exception. + + :param text: the question to ask. + :param default: The default value to use when no input is given. If + ``None``, repeat until input is given. + :param abort: if this is set to `True` a negative answer aborts the + exception by raising :exc:`Abort`. + :param prompt_suffix: a suffix that should be added to the prompt. + :param show_default: shows or hides the default value in the prompt. + :param err: if set to true the file defaults to ``stderr`` instead of + ``stdout``, the same as with echo. + + .. versionchanged:: 8.0 + Repeat until input is given if ``default`` is ``None``. + + .. versionadded:: 4.0 + Added the ``err`` parameter. + """ + prompt = _build_prompt( + text, + prompt_suffix, + show_default, + "y/n" if default is None else ("Y/n" if default else "y/N"), + ) + + while True: + try: + # Write the prompt separately so that we get nice + # coloring through colorama on Windows + echo(prompt.rstrip(" "), nl=False, err=err) + # Echo a space to stdout to work around an issue where + # readline causes backspace to clear the whole line. + value = visible_prompt_func(" ").lower().strip() + except (KeyboardInterrupt, EOFError): + raise Abort() from None + if value in ("y", "yes"): + rv = True + elif value in ("n", "no"): + rv = False + elif default is not None and value == "": + rv = default + else: + echo(_("Error: invalid input"), err=err) + continue + break + if abort and not rv: + raise Abort() + return rv + + +def get_terminal_size() -> os.terminal_size: + """Returns the current size of the terminal as tuple in the form + ``(width, height)`` in columns and rows. + + .. deprecated:: 8.0 + Will be removed in Click 8.1. Use + :func:`shutil.get_terminal_size` instead. + """ + import shutil + import warnings + + warnings.warn( + "'click.get_terminal_size()' is deprecated and will be removed" + " in Click 8.1. Use 'shutil.get_terminal_size()' instead.", + DeprecationWarning, + stacklevel=2, + ) + return shutil.get_terminal_size() + + +def echo_via_pager( + text_or_generator: t.Union[t.Iterable[str], t.Callable[[], t.Iterable[str]], str], + color: t.Optional[bool] = None, +) -> None: + """This function takes a text and shows it via an environment specific + pager on stdout. + + .. versionchanged:: 3.0 + Added the `color` flag. + + :param text_or_generator: the text to page, or alternatively, a + generator emitting the text to page. + :param color: controls if the pager supports ANSI colors or not. The + default is autodetection. + """ + color = resolve_color_default(color) + + if inspect.isgeneratorfunction(text_or_generator): + i = t.cast(t.Callable[[], t.Iterable[str]], text_or_generator)() + elif isinstance(text_or_generator, str): + i = [text_or_generator] + else: + i = iter(t.cast(t.Iterable[str], text_or_generator)) + + # convert every element of i to a text type if necessary + text_generator = (el if isinstance(el, str) else str(el) for el in i) + + from ._termui_impl import pager + + return pager(itertools.chain(text_generator, "\n"), color) + + +def progressbar( + iterable: t.Optional[t.Iterable[V]] = None, + length: t.Optional[int] = None, + label: t.Optional[str] = None, + show_eta: bool = True, + show_percent: t.Optional[bool] = None, + show_pos: bool = False, + item_show_func: t.Optional[t.Callable[[t.Optional[V]], t.Optional[str]]] = None, + fill_char: str = "#", + empty_char: str = "-", + bar_template: str = "%(label)s [%(bar)s] %(info)s", + info_sep: str = " ", + width: int = 36, + file: t.Optional[t.TextIO] = None, + color: t.Optional[bool] = None, + update_min_steps: int = 1, +) -> "ProgressBar[V]": + """This function creates an iterable context manager that can be used + to iterate over something while showing a progress bar. It will + either iterate over the `iterable` or `length` items (that are counted + up). While iteration happens, this function will print a rendered + progress bar to the given `file` (defaults to stdout) and will attempt + to calculate remaining time and more. By default, this progress bar + will not be rendered if the file is not a terminal. + + The context manager creates the progress bar. When the context + manager is entered the progress bar is already created. With every + iteration over the progress bar, the iterable passed to the bar is + advanced and the bar is updated. When the context manager exits, + a newline is printed and the progress bar is finalized on screen. + + Note: The progress bar is currently designed for use cases where the + total progress can be expected to take at least several seconds. + Because of this, the ProgressBar class object won't display + progress that is considered too fast, and progress where the time + between steps is less than a second. + + No printing must happen or the progress bar will be unintentionally + destroyed. + + Example usage:: + + with progressbar(items) as bar: + for item in bar: + do_something_with(item) + + Alternatively, if no iterable is specified, one can manually update the + progress bar through the `update()` method instead of directly + iterating over the progress bar. The update method accepts the number + of steps to increment the bar with:: + + with progressbar(length=chunks.total_bytes) as bar: + for chunk in chunks: + process_chunk(chunk) + bar.update(chunks.bytes) + + The ``update()`` method also takes an optional value specifying the + ``current_item`` at the new position. This is useful when used + together with ``item_show_func`` to customize the output for each + manual step:: + + with click.progressbar( + length=total_size, + label='Unzipping archive', + item_show_func=lambda a: a.filename + ) as bar: + for archive in zip_file: + archive.extract() + bar.update(archive.size, archive) + + :param iterable: an iterable to iterate over. If not provided the length + is required. + :param length: the number of items to iterate over. By default the + progressbar will attempt to ask the iterator about its + length, which might or might not work. If an iterable is + also provided this parameter can be used to override the + length. If an iterable is not provided the progress bar + will iterate over a range of that length. + :param label: the label to show next to the progress bar. + :param show_eta: enables or disables the estimated time display. This is + automatically disabled if the length cannot be + determined. + :param show_percent: enables or disables the percentage display. The + default is `True` if the iterable has a length or + `False` if not. + :param show_pos: enables or disables the absolute position display. The + default is `False`. + :param item_show_func: A function called with the current item which + can return a string to show next to the progress bar. If the + function returns ``None`` nothing is shown. The current item can + be ``None``, such as when entering and exiting the bar. + :param fill_char: the character to use to show the filled part of the + progress bar. + :param empty_char: the character to use to show the non-filled part of + the progress bar. + :param bar_template: the format string to use as template for the bar. + The parameters in it are ``label`` for the label, + ``bar`` for the progress bar and ``info`` for the + info section. + :param info_sep: the separator between multiple info items (eta etc.) + :param width: the width of the progress bar in characters, 0 means full + terminal width + :param file: The file to write to. If this is not a terminal then + only the label is printed. + :param color: controls if the terminal supports ANSI colors or not. The + default is autodetection. This is only needed if ANSI + codes are included anywhere in the progress bar output + which is not the case by default. + :param update_min_steps: Render only when this many updates have + completed. This allows tuning for very fast iterators. + + .. versionchanged:: 8.0 + Output is shown even if execution time is less than 0.5 seconds. + + .. versionchanged:: 8.0 + ``item_show_func`` shows the current item, not the previous one. + + .. versionchanged:: 8.0 + Labels are echoed if the output is not a TTY. Reverts a change + in 7.0 that removed all output. + + .. versionadded:: 8.0 + Added the ``update_min_steps`` parameter. + + .. versionchanged:: 4.0 + Added the ``color`` parameter. Added the ``update`` method to + the object. + + .. versionadded:: 2.0 + """ + from ._termui_impl import ProgressBar + + color = resolve_color_default(color) + return ProgressBar( + iterable=iterable, + length=length, + show_eta=show_eta, + show_percent=show_percent, + show_pos=show_pos, + item_show_func=item_show_func, + fill_char=fill_char, + empty_char=empty_char, + bar_template=bar_template, + info_sep=info_sep, + file=file, + label=label, + width=width, + color=color, + update_min_steps=update_min_steps, + ) + + +def clear() -> None: + """Clears the terminal screen. This will have the effect of clearing + the whole visible space of the terminal and moving the cursor to the + top left. This does not do anything if not connected to a terminal. + + .. versionadded:: 2.0 + """ + if not isatty(sys.stdout): + return + if WIN: + os.system("cls") + else: + sys.stdout.write("\033[2J\033[1;1H") + + +def _interpret_color( + color: t.Union[int, t.Tuple[int, int, int], str], offset: int = 0 +) -> str: + if isinstance(color, int): + return f"{38 + offset};5;{color:d}" + + if isinstance(color, (tuple, list)): + r, g, b = color + return f"{38 + offset};2;{r:d};{g:d};{b:d}" + + return str(_ansi_colors[color] + offset) + + +def style( + text: t.Any, + fg: t.Optional[t.Union[int, t.Tuple[int, int, int], str]] = None, + bg: t.Optional[t.Union[int, t.Tuple[int, int, int], str]] = None, + bold: t.Optional[bool] = None, + dim: t.Optional[bool] = None, + underline: t.Optional[bool] = None, + overline: t.Optional[bool] = None, + italic: t.Optional[bool] = None, + blink: t.Optional[bool] = None, + reverse: t.Optional[bool] = None, + strikethrough: t.Optional[bool] = None, + reset: bool = True, +) -> str: + """Styles a text with ANSI styles and returns the new string. By + default the styling is self contained which means that at the end + of the string a reset code is issued. This can be prevented by + passing ``reset=False``. + + Examples:: + + click.echo(click.style('Hello World!', fg='green')) + click.echo(click.style('ATTENTION!', blink=True)) + click.echo(click.style('Some things', reverse=True, fg='cyan')) + click.echo(click.style('More colors', fg=(255, 12, 128), bg=117)) + + Supported color names: + + * ``black`` (might be a gray) + * ``red`` + * ``green`` + * ``yellow`` (might be an orange) + * ``blue`` + * ``magenta`` + * ``cyan`` + * ``white`` (might be light gray) + * ``bright_black`` + * ``bright_red`` + * ``bright_green`` + * ``bright_yellow`` + * ``bright_blue`` + * ``bright_magenta`` + * ``bright_cyan`` + * ``bright_white`` + * ``reset`` (reset the color code only) + + If the terminal supports it, color may also be specified as: + + - An integer in the interval [0, 255]. The terminal must support + 8-bit/256-color mode. + - An RGB tuple of three integers in [0, 255]. The terminal must + support 24-bit/true-color mode. + + See https://en.wikipedia.org/wiki/ANSI_color and + https://gist.github.com/XVilka/8346728 for more information. + + :param text: the string to style with ansi codes. + :param fg: if provided this will become the foreground color. + :param bg: if provided this will become the background color. + :param bold: if provided this will enable or disable bold mode. + :param dim: if provided this will enable or disable dim mode. This is + badly supported. + :param underline: if provided this will enable or disable underline. + :param overline: if provided this will enable or disable overline. + :param italic: if provided this will enable or disable italic. + :param blink: if provided this will enable or disable blinking. + :param reverse: if provided this will enable or disable inverse + rendering (foreground becomes background and the + other way round). + :param strikethrough: if provided this will enable or disable + striking through text. + :param reset: by default a reset-all code is added at the end of the + string which means that styles do not carry over. This + can be disabled to compose styles. + + .. versionchanged:: 8.0 + A non-string ``message`` is converted to a string. + + .. versionchanged:: 8.0 + Added support for 256 and RGB color codes. + + .. versionchanged:: 8.0 + Added the ``strikethrough``, ``italic``, and ``overline`` + parameters. + + .. versionchanged:: 7.0 + Added support for bright colors. + + .. versionadded:: 2.0 + """ + if not isinstance(text, str): + text = str(text) + + bits = [] + + if fg: + try: + bits.append(f"\033[{_interpret_color(fg)}m") + except KeyError: + raise TypeError(f"Unknown color {fg!r}") from None + + if bg: + try: + bits.append(f"\033[{_interpret_color(bg, 10)}m") + except KeyError: + raise TypeError(f"Unknown color {bg!r}") from None + + if bold is not None: + bits.append(f"\033[{1 if bold else 22}m") + if dim is not None: + bits.append(f"\033[{2 if dim else 22}m") + if underline is not None: + bits.append(f"\033[{4 if underline else 24}m") + if overline is not None: + bits.append(f"\033[{53 if overline else 55}m") + if italic is not None: + bits.append(f"\033[{3 if italic else 23}m") + if blink is not None: + bits.append(f"\033[{5 if blink else 25}m") + if reverse is not None: + bits.append(f"\033[{7 if reverse else 27}m") + if strikethrough is not None: + bits.append(f"\033[{9 if strikethrough else 29}m") + bits.append(text) + if reset: + bits.append(_ansi_reset_all) + return "".join(bits) + + +def unstyle(text: str) -> str: + """Removes ANSI styling information from a string. Usually it's not + necessary to use this function as Click's echo function will + automatically remove styling if necessary. + + .. versionadded:: 2.0 + + :param text: the text to remove style information from. + """ + return strip_ansi(text) + + +def secho( + message: t.Optional[t.Any] = None, + file: t.Optional[t.IO] = None, + nl: bool = True, + err: bool = False, + color: t.Optional[bool] = None, + **styles: t.Any, +) -> None: + """This function combines :func:`echo` and :func:`style` into one + call. As such the following two calls are the same:: + + click.secho('Hello World!', fg='green') + click.echo(click.style('Hello World!', fg='green')) + + All keyword arguments are forwarded to the underlying functions + depending on which one they go with. + + Non-string types will be converted to :class:`str`. However, + :class:`bytes` are passed directly to :meth:`echo` without applying + style. If you want to style bytes that represent text, call + :meth:`bytes.decode` first. + + .. versionchanged:: 8.0 + A non-string ``message`` is converted to a string. Bytes are + passed through without style applied. + + .. versionadded:: 2.0 + """ + if message is not None and not isinstance(message, (bytes, bytearray)): + message = style(message, **styles) + + return echo(message, file=file, nl=nl, err=err, color=color) + + +def edit( + text: t.Optional[t.AnyStr] = None, + editor: t.Optional[str] = None, + env: t.Optional[t.Mapping[str, str]] = None, + require_save: bool = True, + extension: str = ".txt", + filename: t.Optional[str] = None, +) -> t.Optional[t.AnyStr]: + r"""Edits the given text in the defined editor. If an editor is given + (should be the full path to the executable but the regular operating + system search path is used for finding the executable) it overrides + the detected editor. Optionally, some environment variables can be + used. If the editor is closed without changes, `None` is returned. In + case a file is edited directly the return value is always `None` and + `require_save` and `extension` are ignored. + + If the editor cannot be opened a :exc:`UsageError` is raised. + + Note for Windows: to simplify cross-platform usage, the newlines are + automatically converted from POSIX to Windows and vice versa. As such, + the message here will have ``\n`` as newline markers. + + :param text: the text to edit. + :param editor: optionally the editor to use. Defaults to automatic + detection. + :param env: environment variables to forward to the editor. + :param require_save: if this is true, then not saving in the editor + will make the return value become `None`. + :param extension: the extension to tell the editor about. This defaults + to `.txt` but changing this might change syntax + highlighting. + :param filename: if provided it will edit this file instead of the + provided text contents. It will not use a temporary + file as an indirection in that case. + """ + from ._termui_impl import Editor + + ed = Editor(editor=editor, env=env, require_save=require_save, extension=extension) + + if filename is None: + return ed.edit(text) + + ed.edit_file(filename) + return None + + +def launch(url: str, wait: bool = False, locate: bool = False) -> int: + """This function launches the given URL (or filename) in the default + viewer application for this file type. If this is an executable, it + might launch the executable in a new session. The return value is + the exit code of the launched application. Usually, ``0`` indicates + success. + + Examples:: + + click.launch('https://click.palletsprojects.com/') + click.launch('/my/downloaded/file', locate=True) + + .. versionadded:: 2.0 + + :param url: URL or filename of the thing to launch. + :param wait: Wait for the program to exit before returning. This + only works if the launched program blocks. In particular, + ``xdg-open`` on Linux does not block. + :param locate: if this is set to `True` then instead of launching the + application associated with the URL it will attempt to + launch a file manager with the file located. This + might have weird effects if the URL does not point to + the filesystem. + """ + from ._termui_impl import open_url + + return open_url(url, wait=wait, locate=locate) + + +# If this is provided, getchar() calls into this instead. This is used +# for unittesting purposes. +_getchar: t.Optional[t.Callable[[bool], str]] = None + + +def getchar(echo: bool = False) -> str: + """Fetches a single character from the terminal and returns it. This + will always return a unicode character and under certain rare + circumstances this might return more than one character. The + situations which more than one character is returned is when for + whatever reason multiple characters end up in the terminal buffer or + standard input was not actually a terminal. + + Note that this will always read from the terminal, even if something + is piped into the standard input. + + Note for Windows: in rare cases when typing non-ASCII characters, this + function might wait for a second character and then return both at once. + This is because certain Unicode characters look like special-key markers. + + .. versionadded:: 2.0 + + :param echo: if set to `True`, the character read will also show up on + the terminal. The default is to not show it. + """ + global _getchar + + if _getchar is None: + from ._termui_impl import getchar as f + + _getchar = f + + return _getchar(echo) + + +def raw_terminal() -> t.ContextManager[int]: + from ._termui_impl import raw_terminal as f + + return f() + + +def pause(info: t.Optional[str] = None, err: bool = False) -> None: + """This command stops execution and waits for the user to press any + key to continue. This is similar to the Windows batch "pause" + command. If the program is not run through a terminal, this command + will instead do nothing. + + .. versionadded:: 2.0 + + .. versionadded:: 4.0 + Added the `err` parameter. + + :param info: The message to print before pausing. Defaults to + ``"Press any key to continue..."``. + :param err: if set to message goes to ``stderr`` instead of + ``stdout``, the same as with echo. + """ + if not isatty(sys.stdin) or not isatty(sys.stdout): + return + + if info is None: + info = _("Press any key to continue...") + + try: + if info: + echo(info, nl=False, err=err) + try: + getchar() + except (KeyboardInterrupt, EOFError): + pass + finally: + if info: + echo(err=err) diff --git a/.venv/lib/python3.6/site-packages/click/testing.py b/.venv/lib/python3.6/site-packages/click/testing.py new file mode 100644 index 0000000..d19b850 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/testing.py @@ -0,0 +1,479 @@ +import contextlib +import io +import os +import shlex +import shutil +import sys +import tempfile +import typing as t +from types import TracebackType + +from . import formatting +from . import termui +from . import utils +from ._compat import _find_binary_reader + +if t.TYPE_CHECKING: + from .core import BaseCommand + + +class EchoingStdin: + def __init__(self, input: t.BinaryIO, output: t.BinaryIO) -> None: + self._input = input + self._output = output + self._paused = False + + def __getattr__(self, x: str) -> t.Any: + return getattr(self._input, x) + + def _echo(self, rv: bytes) -> bytes: + if not self._paused: + self._output.write(rv) + + return rv + + def read(self, n: int = -1) -> bytes: + return self._echo(self._input.read(n)) + + def read1(self, n: int = -1) -> bytes: + return self._echo(self._input.read1(n)) # type: ignore + + def readline(self, n: int = -1) -> bytes: + return self._echo(self._input.readline(n)) + + def readlines(self) -> t.List[bytes]: + return [self._echo(x) for x in self._input.readlines()] + + def __iter__(self) -> t.Iterator[bytes]: + return iter(self._echo(x) for x in self._input) + + def __repr__(self) -> str: + return repr(self._input) + + +@contextlib.contextmanager +def _pause_echo(stream: t.Optional[EchoingStdin]) -> t.Iterator[None]: + if stream is None: + yield + else: + stream._paused = True + yield + stream._paused = False + + +class _NamedTextIOWrapper(io.TextIOWrapper): + def __init__( + self, buffer: t.BinaryIO, name: str, mode: str, **kwargs: t.Any + ) -> None: + super().__init__(buffer, **kwargs) + self._name = name + self._mode = mode + + @property + def name(self) -> str: + return self._name + + @property + def mode(self) -> str: + return self._mode + + +def make_input_stream( + input: t.Optional[t.Union[str, bytes, t.IO]], charset: str +) -> t.BinaryIO: + # Is already an input stream. + if hasattr(input, "read"): + rv = _find_binary_reader(t.cast(t.IO, input)) + + if rv is not None: + return rv + + raise TypeError("Could not find binary reader for input stream.") + + if input is None: + input = b"" + elif isinstance(input, str): + input = input.encode(charset) + + return io.BytesIO(t.cast(bytes, input)) + + +class Result: + """Holds the captured result of an invoked CLI script.""" + + def __init__( + self, + runner: "CliRunner", + stdout_bytes: bytes, + stderr_bytes: t.Optional[bytes], + return_value: t.Any, + exit_code: int, + exception: t.Optional[BaseException], + exc_info: t.Optional[ + t.Tuple[t.Type[BaseException], BaseException, TracebackType] + ] = None, + ): + #: The runner that created the result + self.runner = runner + #: The standard output as bytes. + self.stdout_bytes = stdout_bytes + #: The standard error as bytes, or None if not available + self.stderr_bytes = stderr_bytes + #: The value returned from the invoked command. + #: + #: .. versionadded:: 8.0 + self.return_value = return_value + #: The exit code as integer. + self.exit_code = exit_code + #: The exception that happened if one did. + self.exception = exception + #: The traceback + self.exc_info = exc_info + + @property + def output(self) -> str: + """The (standard) output as unicode string.""" + return self.stdout + + @property + def stdout(self) -> str: + """The standard output as unicode string.""" + return self.stdout_bytes.decode(self.runner.charset, "replace").replace( + "\r\n", "\n" + ) + + @property + def stderr(self) -> str: + """The standard error as unicode string.""" + if self.stderr_bytes is None: + raise ValueError("stderr not separately captured") + return self.stderr_bytes.decode(self.runner.charset, "replace").replace( + "\r\n", "\n" + ) + + def __repr__(self) -> str: + exc_str = repr(self.exception) if self.exception else "okay" + return f"<{type(self).__name__} {exc_str}>" + + +class CliRunner: + """The CLI runner provides functionality to invoke a Click command line + script for unittesting purposes in a isolated environment. This only + works in single-threaded systems without any concurrency as it changes the + global interpreter state. + + :param charset: the character set for the input and output data. + :param env: a dictionary with environment variables for overriding. + :param echo_stdin: if this is set to `True`, then reading from stdin writes + to stdout. This is useful for showing examples in + some circumstances. Note that regular prompts + will automatically echo the input. + :param mix_stderr: if this is set to `False`, then stdout and stderr are + preserved as independent streams. This is useful for + Unix-philosophy apps that have predictable stdout and + noisy stderr, such that each may be measured + independently + """ + + def __init__( + self, + charset: str = "utf-8", + env: t.Optional[t.Mapping[str, t.Optional[str]]] = None, + echo_stdin: bool = False, + mix_stderr: bool = True, + ) -> None: + self.charset = charset + self.env = env or {} + self.echo_stdin = echo_stdin + self.mix_stderr = mix_stderr + + def get_default_prog_name(self, cli: "BaseCommand") -> str: + """Given a command object it will return the default program name + for it. The default is the `name` attribute or ``"root"`` if not + set. + """ + return cli.name or "root" + + def make_env( + self, overrides: t.Optional[t.Mapping[str, t.Optional[str]]] = None + ) -> t.Mapping[str, t.Optional[str]]: + """Returns the environment overrides for invoking a script.""" + rv = dict(self.env) + if overrides: + rv.update(overrides) + return rv + + @contextlib.contextmanager + def isolation( + self, + input: t.Optional[t.Union[str, bytes, t.IO]] = None, + env: t.Optional[t.Mapping[str, t.Optional[str]]] = None, + color: bool = False, + ) -> t.Iterator[t.Tuple[io.BytesIO, t.Optional[io.BytesIO]]]: + """A context manager that sets up the isolation for invoking of a + command line tool. This sets up stdin with the given input data + and `os.environ` with the overrides from the given dictionary. + This also rebinds some internals in Click to be mocked (like the + prompt functionality). + + This is automatically done in the :meth:`invoke` method. + + :param input: the input stream to put into sys.stdin. + :param env: the environment overrides as dictionary. + :param color: whether the output should contain color codes. The + application can still override this explicitly. + + .. versionchanged:: 8.0 + ``stderr`` is opened with ``errors="backslashreplace"`` + instead of the default ``"strict"``. + + .. versionchanged:: 4.0 + Added the ``color`` parameter. + """ + bytes_input = make_input_stream(input, self.charset) + echo_input = None + + old_stdin = sys.stdin + old_stdout = sys.stdout + old_stderr = sys.stderr + old_forced_width = formatting.FORCED_WIDTH + formatting.FORCED_WIDTH = 80 + + env = self.make_env(env) + + bytes_output = io.BytesIO() + + if self.echo_stdin: + bytes_input = echo_input = t.cast( + t.BinaryIO, EchoingStdin(bytes_input, bytes_output) + ) + + sys.stdin = text_input = _NamedTextIOWrapper( + bytes_input, encoding=self.charset, name="", mode="r" + ) + + if self.echo_stdin: + # Force unbuffered reads, otherwise TextIOWrapper reads a + # large chunk which is echoed early. + text_input._CHUNK_SIZE = 1 # type: ignore + + sys.stdout = _NamedTextIOWrapper( + bytes_output, encoding=self.charset, name="", mode="w" + ) + + bytes_error = None + if self.mix_stderr: + sys.stderr = sys.stdout + else: + bytes_error = io.BytesIO() + sys.stderr = _NamedTextIOWrapper( + bytes_error, + encoding=self.charset, + name="", + mode="w", + errors="backslashreplace", + ) + + @_pause_echo(echo_input) # type: ignore + def visible_input(prompt: t.Optional[str] = None) -> str: + sys.stdout.write(prompt or "") + val = text_input.readline().rstrip("\r\n") + sys.stdout.write(f"{val}\n") + sys.stdout.flush() + return val + + @_pause_echo(echo_input) # type: ignore + def hidden_input(prompt: t.Optional[str] = None) -> str: + sys.stdout.write(f"{prompt or ''}\n") + sys.stdout.flush() + return text_input.readline().rstrip("\r\n") + + @_pause_echo(echo_input) # type: ignore + def _getchar(echo: bool) -> str: + char = sys.stdin.read(1) + + if echo: + sys.stdout.write(char) + + sys.stdout.flush() + return char + + default_color = color + + def should_strip_ansi( + stream: t.Optional[t.IO] = None, color: t.Optional[bool] = None + ) -> bool: + if color is None: + return not default_color + return not color + + old_visible_prompt_func = termui.visible_prompt_func + old_hidden_prompt_func = termui.hidden_prompt_func + old__getchar_func = termui._getchar + old_should_strip_ansi = utils.should_strip_ansi # type: ignore + termui.visible_prompt_func = visible_input + termui.hidden_prompt_func = hidden_input + termui._getchar = _getchar + utils.should_strip_ansi = should_strip_ansi # type: ignore + + old_env = {} + try: + for key, value in env.items(): + old_env[key] = os.environ.get(key) + if value is None: + try: + del os.environ[key] + except Exception: + pass + else: + os.environ[key] = value + yield (bytes_output, bytes_error) + finally: + for key, value in old_env.items(): + if value is None: + try: + del os.environ[key] + except Exception: + pass + else: + os.environ[key] = value + sys.stdout = old_stdout + sys.stderr = old_stderr + sys.stdin = old_stdin + termui.visible_prompt_func = old_visible_prompt_func + termui.hidden_prompt_func = old_hidden_prompt_func + termui._getchar = old__getchar_func + utils.should_strip_ansi = old_should_strip_ansi # type: ignore + formatting.FORCED_WIDTH = old_forced_width + + def invoke( + self, + cli: "BaseCommand", + args: t.Optional[t.Union[str, t.Sequence[str]]] = None, + input: t.Optional[t.Union[str, bytes, t.IO]] = None, + env: t.Optional[t.Mapping[str, t.Optional[str]]] = None, + catch_exceptions: bool = True, + color: bool = False, + **extra: t.Any, + ) -> Result: + """Invokes a command in an isolated environment. The arguments are + forwarded directly to the command line script, the `extra` keyword + arguments are passed to the :meth:`~clickpkg.Command.main` function of + the command. + + This returns a :class:`Result` object. + + :param cli: the command to invoke + :param args: the arguments to invoke. It may be given as an iterable + or a string. When given as string it will be interpreted + as a Unix shell command. More details at + :func:`shlex.split`. + :param input: the input data for `sys.stdin`. + :param env: the environment overrides. + :param catch_exceptions: Whether to catch any other exceptions than + ``SystemExit``. + :param extra: the keyword arguments to pass to :meth:`main`. + :param color: whether the output should contain color codes. The + application can still override this explicitly. + + .. versionchanged:: 8.0 + The result object has the ``return_value`` attribute with + the value returned from the invoked command. + + .. versionchanged:: 4.0 + Added the ``color`` parameter. + + .. versionchanged:: 3.0 + Added the ``catch_exceptions`` parameter. + + .. versionchanged:: 3.0 + The result object has the ``exc_info`` attribute with the + traceback if available. + """ + exc_info = None + with self.isolation(input=input, env=env, color=color) as outstreams: + return_value = None + exception: t.Optional[BaseException] = None + exit_code = 0 + + if isinstance(args, str): + args = shlex.split(args) + + try: + prog_name = extra.pop("prog_name") + except KeyError: + prog_name = self.get_default_prog_name(cli) + + try: + return_value = cli.main(args=args or (), prog_name=prog_name, **extra) + except SystemExit as e: + exc_info = sys.exc_info() + e_code = t.cast(t.Optional[t.Union[int, t.Any]], e.code) + + if e_code is None: + e_code = 0 + + if e_code != 0: + exception = e + + if not isinstance(e_code, int): + sys.stdout.write(str(e_code)) + sys.stdout.write("\n") + e_code = 1 + + exit_code = e_code + + except Exception as e: + if not catch_exceptions: + raise + exception = e + exit_code = 1 + exc_info = sys.exc_info() + finally: + sys.stdout.flush() + stdout = outstreams[0].getvalue() + if self.mix_stderr: + stderr = None + else: + stderr = outstreams[1].getvalue() # type: ignore + + return Result( + runner=self, + stdout_bytes=stdout, + stderr_bytes=stderr, + return_value=return_value, + exit_code=exit_code, + exception=exception, + exc_info=exc_info, # type: ignore + ) + + @contextlib.contextmanager + def isolated_filesystem( + self, temp_dir: t.Optional[t.Union[str, os.PathLike]] = None + ) -> t.Iterator[str]: + """A context manager that creates a temporary directory and + changes the current working directory to it. This isolates tests + that affect the contents of the CWD to prevent them from + interfering with each other. + + :param temp_dir: Create the temporary directory under this + directory. If given, the created directory is not removed + when exiting. + + .. versionchanged:: 8.0 + Added the ``temp_dir`` parameter. + """ + cwd = os.getcwd() + t = tempfile.mkdtemp(dir=temp_dir) + os.chdir(t) + + try: + yield t + finally: + os.chdir(cwd) + + if temp_dir is None: + try: + shutil.rmtree(t) + except OSError: # noqa: B014 + pass diff --git a/.venv/lib/python3.6/site-packages/click/types.py b/.venv/lib/python3.6/site-packages/click/types.py new file mode 100644 index 0000000..103d218 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/types.py @@ -0,0 +1,1052 @@ +import os +import stat +import typing as t +from datetime import datetime +from gettext import gettext as _ +from gettext import ngettext + +from ._compat import _get_argv_encoding +from ._compat import get_filesystem_encoding +from ._compat import open_stream +from .exceptions import BadParameter +from .utils import LazyFile +from .utils import safecall + +if t.TYPE_CHECKING: + import typing_extensions as te + from .core import Context + from .core import Parameter + from .shell_completion import CompletionItem + + +class ParamType: + """Represents the type of a parameter. Validates and converts values + from the command line or Python into the correct type. + + To implement a custom type, subclass and implement at least the + following: + + - The :attr:`name` class attribute must be set. + - Calling an instance of the type with ``None`` must return + ``None``. This is already implemented by default. + - :meth:`convert` must convert string values to the correct type. + - :meth:`convert` must accept values that are already the correct + type. + - It must be able to convert a value if the ``ctx`` and ``param`` + arguments are ``None``. This can occur when converting prompt + input. + """ + + is_composite: t.ClassVar[bool] = False + arity: t.ClassVar[int] = 1 + + #: the descriptive name of this type + name: str + + #: if a list of this type is expected and the value is pulled from a + #: string environment variable, this is what splits it up. `None` + #: means any whitespace. For all parameters the general rule is that + #: whitespace splits them up. The exception are paths and files which + #: are split by ``os.path.pathsep`` by default (":" on Unix and ";" on + #: Windows). + envvar_list_splitter: t.ClassVar[t.Optional[str]] = None + + def to_info_dict(self) -> t.Dict[str, t.Any]: + """Gather information that could be useful for a tool generating + user-facing documentation. + + Use :meth:`click.Context.to_info_dict` to traverse the entire + CLI structure. + + .. versionadded:: 8.0 + """ + # The class name without the "ParamType" suffix. + param_type = type(self).__name__.partition("ParamType")[0] + param_type = param_type.partition("ParameterType")[0] + return {"param_type": param_type, "name": self.name} + + def __call__( + self, + value: t.Any, + param: t.Optional["Parameter"] = None, + ctx: t.Optional["Context"] = None, + ) -> t.Any: + if value is not None: + return self.convert(value, param, ctx) + + def get_metavar(self, param: "Parameter") -> t.Optional[str]: + """Returns the metavar default for this param if it provides one.""" + + def get_missing_message(self, param: "Parameter") -> t.Optional[str]: + """Optionally might return extra information about a missing + parameter. + + .. versionadded:: 2.0 + """ + + def convert( + self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"] + ) -> t.Any: + """Convert the value to the correct type. This is not called if + the value is ``None`` (the missing value). + + This must accept string values from the command line, as well as + values that are already the correct type. It may also convert + other compatible types. + + The ``param`` and ``ctx`` arguments may be ``None`` in certain + situations, such as when converting prompt input. + + If the value cannot be converted, call :meth:`fail` with a + descriptive message. + + :param value: The value to convert. + :param param: The parameter that is using this type to convert + its value. May be ``None``. + :param ctx: The current context that arrived at this value. May + be ``None``. + """ + return value + + def split_envvar_value(self, rv: str) -> t.Sequence[str]: + """Given a value from an environment variable this splits it up + into small chunks depending on the defined envvar list splitter. + + If the splitter is set to `None`, which means that whitespace splits, + then leading and trailing whitespace is ignored. Otherwise, leading + and trailing splitters usually lead to empty items being included. + """ + return (rv or "").split(self.envvar_list_splitter) + + def fail( + self, + message: str, + param: t.Optional["Parameter"] = None, + ctx: t.Optional["Context"] = None, + ) -> "t.NoReturn": + """Helper method to fail with an invalid value message.""" + raise BadParameter(message, ctx=ctx, param=param) + + def shell_complete( + self, ctx: "Context", param: "Parameter", incomplete: str + ) -> t.List["CompletionItem"]: + """Return a list of + :class:`~click.shell_completion.CompletionItem` objects for the + incomplete value. Most types do not provide completions, but + some do, and this allows custom types to provide custom + completions as well. + + :param ctx: Invocation context for this command. + :param param: The parameter that is requesting completion. + :param incomplete: Value being completed. May be empty. + + .. versionadded:: 8.0 + """ + return [] + + +class CompositeParamType(ParamType): + is_composite = True + + @property + def arity(self) -> int: # type: ignore + raise NotImplementedError() + + +class FuncParamType(ParamType): + def __init__(self, func: t.Callable[[t.Any], t.Any]) -> None: + self.name = func.__name__ + self.func = func + + def to_info_dict(self) -> t.Dict[str, t.Any]: + info_dict = super().to_info_dict() + info_dict["func"] = self.func + return info_dict + + def convert( + self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"] + ) -> t.Any: + try: + return self.func(value) + except ValueError: + try: + value = str(value) + except UnicodeError: + value = value.decode("utf-8", "replace") + + self.fail(value, param, ctx) + + +class UnprocessedParamType(ParamType): + name = "text" + + def convert( + self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"] + ) -> t.Any: + return value + + def __repr__(self) -> str: + return "UNPROCESSED" + + +class StringParamType(ParamType): + name = "text" + + def convert( + self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"] + ) -> t.Any: + if isinstance(value, bytes): + enc = _get_argv_encoding() + try: + value = value.decode(enc) + except UnicodeError: + fs_enc = get_filesystem_encoding() + if fs_enc != enc: + try: + value = value.decode(fs_enc) + except UnicodeError: + value = value.decode("utf-8", "replace") + else: + value = value.decode("utf-8", "replace") + return value + return str(value) + + def __repr__(self) -> str: + return "STRING" + + +class Choice(ParamType): + """The choice type allows a value to be checked against a fixed set + of supported values. All of these values have to be strings. + + You should only pass a list or tuple of choices. Other iterables + (like generators) may lead to surprising results. + + The resulting value will always be one of the originally passed choices + regardless of ``case_sensitive`` or any ``ctx.token_normalize_func`` + being specified. + + See :ref:`choice-opts` for an example. + + :param case_sensitive: Set to false to make choices case + insensitive. Defaults to true. + """ + + name = "choice" + + def __init__(self, choices: t.Sequence[str], case_sensitive: bool = True) -> None: + self.choices = choices + self.case_sensitive = case_sensitive + + def to_info_dict(self) -> t.Dict[str, t.Any]: + info_dict = super().to_info_dict() + info_dict["choices"] = self.choices + info_dict["case_sensitive"] = self.case_sensitive + return info_dict + + def get_metavar(self, param: "Parameter") -> str: + choices_str = "|".join(self.choices) + + # Use curly braces to indicate a required argument. + if param.required and param.param_type_name == "argument": + return f"{{{choices_str}}}" + + # Use square braces to indicate an option or optional argument. + return f"[{choices_str}]" + + def get_missing_message(self, param: "Parameter") -> str: + return _("Choose from:\n\t{choices}").format(choices=",\n\t".join(self.choices)) + + def convert( + self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"] + ) -> t.Any: + # Match through normalization and case sensitivity + # first do token_normalize_func, then lowercase + # preserve original `value` to produce an accurate message in + # `self.fail` + normed_value = value + normed_choices = {choice: choice for choice in self.choices} + + if ctx is not None and ctx.token_normalize_func is not None: + normed_value = ctx.token_normalize_func(value) + normed_choices = { + ctx.token_normalize_func(normed_choice): original + for normed_choice, original in normed_choices.items() + } + + if not self.case_sensitive: + normed_value = normed_value.casefold() + normed_choices = { + normed_choice.casefold(): original + for normed_choice, original in normed_choices.items() + } + + if normed_value in normed_choices: + return normed_choices[normed_value] + + choices_str = ", ".join(map(repr, self.choices)) + self.fail( + ngettext( + "{value!r} is not {choice}.", + "{value!r} is not one of {choices}.", + len(self.choices), + ).format(value=value, choice=choices_str, choices=choices_str), + param, + ctx, + ) + + def __repr__(self) -> str: + return f"Choice({list(self.choices)})" + + def shell_complete( + self, ctx: "Context", param: "Parameter", incomplete: str + ) -> t.List["CompletionItem"]: + """Complete choices that start with the incomplete value. + + :param ctx: Invocation context for this command. + :param param: The parameter that is requesting completion. + :param incomplete: Value being completed. May be empty. + + .. versionadded:: 8.0 + """ + from click.shell_completion import CompletionItem + + str_choices = map(str, self.choices) + + if self.case_sensitive: + matched = (c for c in str_choices if c.startswith(incomplete)) + else: + incomplete = incomplete.lower() + matched = (c for c in str_choices if c.lower().startswith(incomplete)) + + return [CompletionItem(c) for c in matched] + + +class DateTime(ParamType): + """The DateTime type converts date strings into `datetime` objects. + + The format strings which are checked are configurable, but default to some + common (non-timezone aware) ISO 8601 formats. + + When specifying *DateTime* formats, you should only pass a list or a tuple. + Other iterables, like generators, may lead to surprising results. + + The format strings are processed using ``datetime.strptime``, and this + consequently defines the format strings which are allowed. + + Parsing is tried using each format, in order, and the first format which + parses successfully is used. + + :param formats: A list or tuple of date format strings, in the order in + which they should be tried. Defaults to + ``'%Y-%m-%d'``, ``'%Y-%m-%dT%H:%M:%S'``, + ``'%Y-%m-%d %H:%M:%S'``. + """ + + name = "datetime" + + def __init__(self, formats: t.Optional[t.Sequence[str]] = None): + self.formats = formats or ["%Y-%m-%d", "%Y-%m-%dT%H:%M:%S", "%Y-%m-%d %H:%M:%S"] + + def to_info_dict(self) -> t.Dict[str, t.Any]: + info_dict = super().to_info_dict() + info_dict["formats"] = self.formats + return info_dict + + def get_metavar(self, param: "Parameter") -> str: + return f"[{'|'.join(self.formats)}]" + + def _try_to_convert_date(self, value: t.Any, format: str) -> t.Optional[datetime]: + try: + return datetime.strptime(value, format) + except ValueError: + return None + + def convert( + self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"] + ) -> t.Any: + if isinstance(value, datetime): + return value + + for format in self.formats: + converted = self._try_to_convert_date(value, format) + + if converted is not None: + return converted + + formats_str = ", ".join(map(repr, self.formats)) + self.fail( + ngettext( + "{value!r} does not match the format {format}.", + "{value!r} does not match the formats {formats}.", + len(self.formats), + ).format(value=value, format=formats_str, formats=formats_str), + param, + ctx, + ) + + def __repr__(self) -> str: + return "DateTime" + + +class _NumberParamTypeBase(ParamType): + _number_class: t.ClassVar[t.Type] + + def convert( + self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"] + ) -> t.Any: + try: + return self._number_class(value) + except ValueError: + self.fail( + _("{value!r} is not a valid {number_type}.").format( + value=value, number_type=self.name + ), + param, + ctx, + ) + + +class _NumberRangeBase(_NumberParamTypeBase): + def __init__( + self, + min: t.Optional[float] = None, + max: t.Optional[float] = None, + min_open: bool = False, + max_open: bool = False, + clamp: bool = False, + ) -> None: + self.min = min + self.max = max + self.min_open = min_open + self.max_open = max_open + self.clamp = clamp + + def to_info_dict(self) -> t.Dict[str, t.Any]: + info_dict = super().to_info_dict() + info_dict.update( + min=self.min, + max=self.max, + min_open=self.min_open, + max_open=self.max_open, + clamp=self.clamp, + ) + return info_dict + + def convert( + self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"] + ) -> t.Any: + import operator + + rv = super().convert(value, param, ctx) + lt_min: bool = self.min is not None and ( + operator.le if self.min_open else operator.lt + )(rv, self.min) + gt_max: bool = self.max is not None and ( + operator.ge if self.max_open else operator.gt + )(rv, self.max) + + if self.clamp: + if lt_min: + return self._clamp(self.min, 1, self.min_open) # type: ignore + + if gt_max: + return self._clamp(self.max, -1, self.max_open) # type: ignore + + if lt_min or gt_max: + self.fail( + _("{value} is not in the range {range}.").format( + value=rv, range=self._describe_range() + ), + param, + ctx, + ) + + return rv + + def _clamp(self, bound: float, dir: "te.Literal[1, -1]", open: bool) -> float: + """Find the valid value to clamp to bound in the given + direction. + + :param bound: The boundary value. + :param dir: 1 or -1 indicating the direction to move. + :param open: If true, the range does not include the bound. + """ + raise NotImplementedError + + def _describe_range(self) -> str: + """Describe the range for use in help text.""" + if self.min is None: + op = "<" if self.max_open else "<=" + return f"x{op}{self.max}" + + if self.max is None: + op = ">" if self.min_open else ">=" + return f"x{op}{self.min}" + + lop = "<" if self.min_open else "<=" + rop = "<" if self.max_open else "<=" + return f"{self.min}{lop}x{rop}{self.max}" + + def __repr__(self) -> str: + clamp = " clamped" if self.clamp else "" + return f"<{type(self).__name__} {self._describe_range()}{clamp}>" + + +class IntParamType(_NumberParamTypeBase): + name = "integer" + _number_class = int + + def __repr__(self) -> str: + return "INT" + + +class IntRange(_NumberRangeBase, IntParamType): + """Restrict an :data:`click.INT` value to a range of accepted + values. See :ref:`ranges`. + + If ``min`` or ``max`` are not passed, any value is accepted in that + direction. If ``min_open`` or ``max_open`` are enabled, the + corresponding boundary is not included in the range. + + If ``clamp`` is enabled, a value outside the range is clamped to the + boundary instead of failing. + + .. versionchanged:: 8.0 + Added the ``min_open`` and ``max_open`` parameters. + """ + + name = "integer range" + + def _clamp( # type: ignore + self, bound: int, dir: "te.Literal[1, -1]", open: bool + ) -> int: + if not open: + return bound + + return bound + dir + + +class FloatParamType(_NumberParamTypeBase): + name = "float" + _number_class = float + + def __repr__(self) -> str: + return "FLOAT" + + +class FloatRange(_NumberRangeBase, FloatParamType): + """Restrict a :data:`click.FLOAT` value to a range of accepted + values. See :ref:`ranges`. + + If ``min`` or ``max`` are not passed, any value is accepted in that + direction. If ``min_open`` or ``max_open`` are enabled, the + corresponding boundary is not included in the range. + + If ``clamp`` is enabled, a value outside the range is clamped to the + boundary instead of failing. This is not supported if either + boundary is marked ``open``. + + .. versionchanged:: 8.0 + Added the ``min_open`` and ``max_open`` parameters. + """ + + name = "float range" + + def __init__( + self, + min: t.Optional[float] = None, + max: t.Optional[float] = None, + min_open: bool = False, + max_open: bool = False, + clamp: bool = False, + ) -> None: + super().__init__( + min=min, max=max, min_open=min_open, max_open=max_open, clamp=clamp + ) + + if (min_open or max_open) and clamp: + raise TypeError("Clamping is not supported for open bounds.") + + def _clamp(self, bound: float, dir: "te.Literal[1, -1]", open: bool) -> float: + if not open: + return bound + + # Could use Python 3.9's math.nextafter here, but clamping an + # open float range doesn't seem to be particularly useful. It's + # left up to the user to write a callback to do it if needed. + raise RuntimeError("Clamping is not supported for open bounds.") + + +class BoolParamType(ParamType): + name = "boolean" + + def convert( + self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"] + ) -> t.Any: + if value in {False, True}: + return bool(value) + + norm = value.strip().lower() + + if norm in {"1", "true", "t", "yes", "y", "on"}: + return True + + if norm in {"0", "false", "f", "no", "n", "off"}: + return False + + self.fail( + _("{value!r} is not a valid boolean.").format(value=value), param, ctx + ) + + def __repr__(self) -> str: + return "BOOL" + + +class UUIDParameterType(ParamType): + name = "uuid" + + def convert( + self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"] + ) -> t.Any: + import uuid + + if isinstance(value, uuid.UUID): + return value + + value = value.strip() + + try: + return uuid.UUID(value) + except ValueError: + self.fail( + _("{value!r} is not a valid UUID.").format(value=value), param, ctx + ) + + def __repr__(self) -> str: + return "UUID" + + +class File(ParamType): + """Declares a parameter to be a file for reading or writing. The file + is automatically closed once the context tears down (after the command + finished working). + + Files can be opened for reading or writing. The special value ``-`` + indicates stdin or stdout depending on the mode. + + By default, the file is opened for reading text data, but it can also be + opened in binary mode or for writing. The encoding parameter can be used + to force a specific encoding. + + The `lazy` flag controls if the file should be opened immediately or upon + first IO. The default is to be non-lazy for standard input and output + streams as well as files opened for reading, `lazy` otherwise. When opening a + file lazily for reading, it is still opened temporarily for validation, but + will not be held open until first IO. lazy is mainly useful when opening + for writing to avoid creating the file until it is needed. + + Starting with Click 2.0, files can also be opened atomically in which + case all writes go into a separate file in the same folder and upon + completion the file will be moved over to the original location. This + is useful if a file regularly read by other users is modified. + + See :ref:`file-args` for more information. + """ + + name = "filename" + envvar_list_splitter = os.path.pathsep + + def __init__( + self, + mode: str = "r", + encoding: t.Optional[str] = None, + errors: t.Optional[str] = "strict", + lazy: t.Optional[bool] = None, + atomic: bool = False, + ) -> None: + self.mode = mode + self.encoding = encoding + self.errors = errors + self.lazy = lazy + self.atomic = atomic + + def to_info_dict(self) -> t.Dict[str, t.Any]: + info_dict = super().to_info_dict() + info_dict.update(mode=self.mode, encoding=self.encoding) + return info_dict + + def resolve_lazy_flag(self, value: t.Any) -> bool: + if self.lazy is not None: + return self.lazy + if value == "-": + return False + elif "w" in self.mode: + return True + return False + + def convert( + self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"] + ) -> t.Any: + try: + if hasattr(value, "read") or hasattr(value, "write"): + return value + + lazy = self.resolve_lazy_flag(value) + + if lazy: + f: t.IO = t.cast( + t.IO, + LazyFile( + value, self.mode, self.encoding, self.errors, atomic=self.atomic + ), + ) + + if ctx is not None: + ctx.call_on_close(f.close_intelligently) # type: ignore + + return f + + f, should_close = open_stream( + value, self.mode, self.encoding, self.errors, atomic=self.atomic + ) + + # If a context is provided, we automatically close the file + # at the end of the context execution (or flush out). If a + # context does not exist, it's the caller's responsibility to + # properly close the file. This for instance happens when the + # type is used with prompts. + if ctx is not None: + if should_close: + ctx.call_on_close(safecall(f.close)) + else: + ctx.call_on_close(safecall(f.flush)) + + return f + except OSError as e: # noqa: B014 + self.fail(f"{os.fsdecode(value)!r}: {e.strerror}", param, ctx) + + def shell_complete( + self, ctx: "Context", param: "Parameter", incomplete: str + ) -> t.List["CompletionItem"]: + """Return a special completion marker that tells the completion + system to use the shell to provide file path completions. + + :param ctx: Invocation context for this command. + :param param: The parameter that is requesting completion. + :param incomplete: Value being completed. May be empty. + + .. versionadded:: 8.0 + """ + from click.shell_completion import CompletionItem + + return [CompletionItem(incomplete, type="file")] + + +class Path(ParamType): + """The path type is similar to the :class:`File` type but it performs + different checks. First of all, instead of returning an open file + handle it returns just the filename. Secondly, it can perform various + basic checks about what the file or directory should be. + + :param exists: if set to true, the file or directory needs to exist for + this value to be valid. If this is not required and a + file does indeed not exist, then all further checks are + silently skipped. + :param file_okay: controls if a file is a possible value. + :param dir_okay: controls if a directory is a possible value. + :param writable: if true, a writable check is performed. + :param readable: if true, a readable check is performed. + :param resolve_path: if this is true, then the path is fully resolved + before the value is passed onwards. This means + that it's absolute and symlinks are resolved. It + will not expand a tilde-prefix, as this is + supposed to be done by the shell only. + :param allow_dash: If this is set to `True`, a single dash to indicate + standard streams is permitted. + :param path_type: Convert the incoming path value to this type. If + ``None``, keep Python's default, which is ``str``. Useful to + convert to :class:`pathlib.Path`. + + .. versionchanged:: 8.0 + Allow passing ``type=pathlib.Path``. + + .. versionchanged:: 6.0 + Added the ``allow_dash`` parameter. + """ + + envvar_list_splitter = os.path.pathsep + + def __init__( + self, + exists: bool = False, + file_okay: bool = True, + dir_okay: bool = True, + writable: bool = False, + readable: bool = True, + resolve_path: bool = False, + allow_dash: bool = False, + path_type: t.Optional[t.Type] = None, + ): + self.exists = exists + self.file_okay = file_okay + self.dir_okay = dir_okay + self.writable = writable + self.readable = readable + self.resolve_path = resolve_path + self.allow_dash = allow_dash + self.type = path_type + + if self.file_okay and not self.dir_okay: + self.name = _("file") + elif self.dir_okay and not self.file_okay: + self.name = _("directory") + else: + self.name = _("path") + + def to_info_dict(self) -> t.Dict[str, t.Any]: + info_dict = super().to_info_dict() + info_dict.update( + exists=self.exists, + file_okay=self.file_okay, + dir_okay=self.dir_okay, + writable=self.writable, + readable=self.readable, + allow_dash=self.allow_dash, + ) + return info_dict + + def coerce_path_result(self, rv: t.Any) -> t.Any: + if self.type is not None and not isinstance(rv, self.type): + if self.type is str: + rv = os.fsdecode(rv) + elif self.type is bytes: + rv = os.fsencode(rv) + else: + rv = self.type(rv) + + return rv + + def convert( + self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"] + ) -> t.Any: + rv = value + + is_dash = self.file_okay and self.allow_dash and rv in (b"-", "-") + + if not is_dash: + if self.resolve_path: + # os.path.realpath doesn't resolve symlinks on Windows + # until Python 3.8. Use pathlib for now. + import pathlib + + rv = os.fsdecode(pathlib.Path(rv).resolve()) + + try: + st = os.stat(rv) + except OSError: + if not self.exists: + return self.coerce_path_result(rv) + self.fail( + _("{name} {filename!r} does not exist.").format( + name=self.name.title(), filename=os.fsdecode(value) + ), + param, + ctx, + ) + + if not self.file_okay and stat.S_ISREG(st.st_mode): + self.fail( + _("{name} {filename!r} is a file.").format( + name=self.name.title(), filename=os.fsdecode(value) + ), + param, + ctx, + ) + if not self.dir_okay and stat.S_ISDIR(st.st_mode): + self.fail( + _("{name} {filename!r} is a directory.").format( + name=self.name.title(), filename=os.fsdecode(value) + ), + param, + ctx, + ) + if self.writable and not os.access(rv, os.W_OK): + self.fail( + _("{name} {filename!r} is not writable.").format( + name=self.name.title(), filename=os.fsdecode(value) + ), + param, + ctx, + ) + if self.readable and not os.access(rv, os.R_OK): + self.fail( + _("{name} {filename!r} is not readable.").format( + name=self.name.title(), filename=os.fsdecode(value) + ), + param, + ctx, + ) + + return self.coerce_path_result(rv) + + def shell_complete( + self, ctx: "Context", param: "Parameter", incomplete: str + ) -> t.List["CompletionItem"]: + """Return a special completion marker that tells the completion + system to use the shell to provide path completions for only + directories or any paths. + + :param ctx: Invocation context for this command. + :param param: The parameter that is requesting completion. + :param incomplete: Value being completed. May be empty. + + .. versionadded:: 8.0 + """ + from click.shell_completion import CompletionItem + + type = "dir" if self.dir_okay and not self.file_okay else "file" + return [CompletionItem(incomplete, type=type)] + + +class Tuple(CompositeParamType): + """The default behavior of Click is to apply a type on a value directly. + This works well in most cases, except for when `nargs` is set to a fixed + count and different types should be used for different items. In this + case the :class:`Tuple` type can be used. This type can only be used + if `nargs` is set to a fixed number. + + For more information see :ref:`tuple-type`. + + This can be selected by using a Python tuple literal as a type. + + :param types: a list of types that should be used for the tuple items. + """ + + def __init__(self, types: t.Sequence[t.Union[t.Type, ParamType]]) -> None: + self.types = [convert_type(ty) for ty in types] + + def to_info_dict(self) -> t.Dict[str, t.Any]: + info_dict = super().to_info_dict() + info_dict["types"] = [t.to_info_dict() for t in self.types] + return info_dict + + @property + def name(self) -> str: # type: ignore + return f"<{' '.join(ty.name for ty in self.types)}>" + + @property + def arity(self) -> int: # type: ignore + return len(self.types) + + def convert( + self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"] + ) -> t.Any: + len_type = len(self.types) + len_value = len(value) + + if len_value != len_type: + self.fail( + ngettext( + "{len_type} values are required, but {len_value} was given.", + "{len_type} values are required, but {len_value} were given.", + len_value, + ).format(len_type=len_type, len_value=len_value), + param=param, + ctx=ctx, + ) + + return tuple(ty(x, param, ctx) for ty, x in zip(self.types, value)) + + +def convert_type(ty: t.Optional[t.Any], default: t.Optional[t.Any] = None) -> ParamType: + """Find the most appropriate :class:`ParamType` for the given Python + type. If the type isn't provided, it can be inferred from a default + value. + """ + guessed_type = False + + if ty is None and default is not None: + if isinstance(default, (tuple, list)): + # If the default is empty, ty will remain None and will + # return STRING. + if default: + item = default[0] + + # A tuple of tuples needs to detect the inner types. + # Can't call convert recursively because that would + # incorrectly unwind the tuple to a single type. + if isinstance(item, (tuple, list)): + ty = tuple(map(type, item)) + else: + ty = type(item) + else: + ty = type(default) + + guessed_type = True + + if isinstance(ty, tuple): + return Tuple(ty) + + if isinstance(ty, ParamType): + return ty + + if ty is str or ty is None: + return STRING + + if ty is int: + return INT + + if ty is float: + return FLOAT + + if ty is bool: + return BOOL + + if guessed_type: + return STRING + + if __debug__: + try: + if issubclass(ty, ParamType): + raise AssertionError( + f"Attempted to use an uninstantiated parameter type ({ty})." + ) + except TypeError: + # ty is an instance (correct), so issubclass fails. + pass + + return FuncParamType(ty) + + +#: A dummy parameter type that just does nothing. From a user's +#: perspective this appears to just be the same as `STRING` but +#: internally no string conversion takes place if the input was bytes. +#: This is usually useful when working with file paths as they can +#: appear in bytes and unicode. +#: +#: For path related uses the :class:`Path` type is a better choice but +#: there are situations where an unprocessed type is useful which is why +#: it is is provided. +#: +#: .. versionadded:: 4.0 +UNPROCESSED = UnprocessedParamType() + +#: A unicode string parameter type which is the implicit default. This +#: can also be selected by using ``str`` as type. +STRING = StringParamType() + +#: An integer parameter. This can also be selected by using ``int`` as +#: type. +INT = IntParamType() + +#: A floating point value parameter. This can also be selected by using +#: ``float`` as type. +FLOAT = FloatParamType() + +#: A boolean parameter. This is the default for boolean flags. This can +#: also be selected by using ``bool`` as a type. +BOOL = BoolParamType() + +#: A UUID parameter. +UUID = UUIDParameterType() diff --git a/.venv/lib/python3.6/site-packages/click/utils.py b/.venv/lib/python3.6/site-packages/click/utils.py new file mode 100644 index 0000000..16033d6 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/click/utils.py @@ -0,0 +1,579 @@ +import os +import sys +import typing as t +from functools import update_wrapper +from types import ModuleType + +from ._compat import _default_text_stderr +from ._compat import _default_text_stdout +from ._compat import _find_binary_writer +from ._compat import auto_wrap_for_ansi +from ._compat import binary_streams +from ._compat import get_filesystem_encoding +from ._compat import open_stream +from ._compat import should_strip_ansi +from ._compat import strip_ansi +from ._compat import text_streams +from ._compat import WIN +from .globals import resolve_color_default + +if t.TYPE_CHECKING: + import typing_extensions as te + +F = t.TypeVar("F", bound=t.Callable[..., t.Any]) + + +def _posixify(name: str) -> str: + return "-".join(name.split()).lower() + + +def safecall(func: F) -> F: + """Wraps a function so that it swallows exceptions.""" + + def wrapper(*args, **kwargs): # type: ignore + try: + return func(*args, **kwargs) + except Exception: + pass + + return update_wrapper(t.cast(F, wrapper), func) + + +def make_str(value: t.Any) -> str: + """Converts a value into a valid string.""" + if isinstance(value, bytes): + try: + return value.decode(get_filesystem_encoding()) + except UnicodeError: + return value.decode("utf-8", "replace") + return str(value) + + +def make_default_short_help(help: str, max_length: int = 45) -> str: + """Returns a condensed version of help string.""" + # Consider only the first paragraph. + paragraph_end = help.find("\n\n") + + if paragraph_end != -1: + help = help[:paragraph_end] + + # Collapse newlines, tabs, and spaces. + words = help.split() + + if not words: + return "" + + # The first paragraph started with a "no rewrap" marker, ignore it. + if words[0] == "\b": + words = words[1:] + + total_length = 0 + last_index = len(words) - 1 + + for i, word in enumerate(words): + total_length += len(word) + (i > 0) + + if total_length > max_length: # too long, truncate + break + + if word[-1] == ".": # sentence end, truncate without "..." + return " ".join(words[: i + 1]) + + if total_length == max_length and i != last_index: + break # not at sentence end, truncate with "..." + else: + return " ".join(words) # no truncation needed + + # Account for the length of the suffix. + total_length += len("...") + + # remove words until the length is short enough + while i > 0: + total_length -= len(words[i]) + (i > 0) + + if total_length <= max_length: + break + + i -= 1 + + return " ".join(words[:i]) + "..." + + +class LazyFile: + """A lazy file works like a regular file but it does not fully open + the file but it does perform some basic checks early to see if the + filename parameter does make sense. This is useful for safely opening + files for writing. + """ + + def __init__( + self, + filename: str, + mode: str = "r", + encoding: t.Optional[str] = None, + errors: t.Optional[str] = "strict", + atomic: bool = False, + ): + self.name = filename + self.mode = mode + self.encoding = encoding + self.errors = errors + self.atomic = atomic + self._f: t.Optional[t.IO] + + if filename == "-": + self._f, self.should_close = open_stream(filename, mode, encoding, errors) + else: + if "r" in mode: + # Open and close the file in case we're opening it for + # reading so that we can catch at least some errors in + # some cases early. + open(filename, mode).close() + self._f = None + self.should_close = True + + def __getattr__(self, name: str) -> t.Any: + return getattr(self.open(), name) + + def __repr__(self) -> str: + if self._f is not None: + return repr(self._f) + return f"" + + def open(self) -> t.IO: + """Opens the file if it's not yet open. This call might fail with + a :exc:`FileError`. Not handling this error will produce an error + that Click shows. + """ + if self._f is not None: + return self._f + try: + rv, self.should_close = open_stream( + self.name, self.mode, self.encoding, self.errors, atomic=self.atomic + ) + except OSError as e: # noqa: E402 + from .exceptions import FileError + + raise FileError(self.name, hint=e.strerror) from e + self._f = rv + return rv + + def close(self) -> None: + """Closes the underlying file, no matter what.""" + if self._f is not None: + self._f.close() + + def close_intelligently(self) -> None: + """This function only closes the file if it was opened by the lazy + file wrapper. For instance this will never close stdin. + """ + if self.should_close: + self.close() + + def __enter__(self) -> "LazyFile": + return self + + def __exit__(self, exc_type, exc_value, tb): # type: ignore + self.close_intelligently() + + def __iter__(self) -> t.Iterator[t.AnyStr]: + self.open() + return iter(self._f) # type: ignore + + +class KeepOpenFile: + def __init__(self, file: t.IO) -> None: + self._file = file + + def __getattr__(self, name: str) -> t.Any: + return getattr(self._file, name) + + def __enter__(self) -> "KeepOpenFile": + return self + + def __exit__(self, exc_type, exc_value, tb): # type: ignore + pass + + def __repr__(self) -> str: + return repr(self._file) + + def __iter__(self) -> t.Iterator[t.AnyStr]: + return iter(self._file) + + +def echo( + message: t.Optional[t.Any] = None, + file: t.Optional[t.IO] = None, + nl: bool = True, + err: bool = False, + color: t.Optional[bool] = None, +) -> None: + """Print a message and newline to stdout or a file. This should be + used instead of :func:`print` because it provides better support + for different data, files, and environments. + + Compared to :func:`print`, this does the following: + + - Ensures that the output encoding is not misconfigured on Linux. + - Supports Unicode in the Windows console. + - Supports writing to binary outputs, and supports writing bytes + to text outputs. + - Supports colors and styles on Windows. + - Removes ANSI color and style codes if the output does not look + like an interactive terminal. + - Always flushes the output. + + :param message: The string or bytes to output. Other objects are + converted to strings. + :param file: The file to write to. Defaults to ``stdout``. + :param err: Write to ``stderr`` instead of ``stdout``. + :param nl: Print a newline after the message. Enabled by default. + :param color: Force showing or hiding colors and other styles. By + default Click will remove color if the output does not look like + an interactive terminal. + + .. versionchanged:: 6.0 + Support Unicode output on the Windows console. Click does not + modify ``sys.stdout``, so ``sys.stdout.write()`` and ``print()`` + will still not support Unicode. + + .. versionchanged:: 4.0 + Added the ``color`` parameter. + + .. versionadded:: 3.0 + Added the ``err`` parameter. + + .. versionchanged:: 2.0 + Support colors on Windows if colorama is installed. + """ + if file is None: + if err: + file = _default_text_stderr() + else: + file = _default_text_stdout() + + # Convert non bytes/text into the native string type. + if message is not None and not isinstance(message, (str, bytes, bytearray)): + out: t.Optional[t.Union[str, bytes]] = str(message) + else: + out = message + + if nl: + out = out or "" + if isinstance(out, str): + out += "\n" + else: + out += b"\n" + + if not out: + file.flush() + return + + # If there is a message and the value looks like bytes, we manually + # need to find the binary stream and write the message in there. + # This is done separately so that most stream types will work as you + # would expect. Eg: you can write to StringIO for other cases. + if isinstance(out, (bytes, bytearray)): + binary_file = _find_binary_writer(file) + + if binary_file is not None: + file.flush() + binary_file.write(out) + binary_file.flush() + return + + # ANSI style code support. For no message or bytes, nothing happens. + # When outputting to a file instead of a terminal, strip codes. + else: + color = resolve_color_default(color) + + if should_strip_ansi(file, color): + out = strip_ansi(out) + elif WIN: + if auto_wrap_for_ansi is not None: + file = auto_wrap_for_ansi(file) # type: ignore + elif not color: + out = strip_ansi(out) + + file.write(out) # type: ignore + file.flush() + + +def get_binary_stream(name: "te.Literal['stdin', 'stdout', 'stderr']") -> t.BinaryIO: + """Returns a system stream for byte processing. + + :param name: the name of the stream to open. Valid names are ``'stdin'``, + ``'stdout'`` and ``'stderr'`` + """ + opener = binary_streams.get(name) + if opener is None: + raise TypeError(f"Unknown standard stream '{name}'") + return opener() + + +def get_text_stream( + name: "te.Literal['stdin', 'stdout', 'stderr']", + encoding: t.Optional[str] = None, + errors: t.Optional[str] = "strict", +) -> t.TextIO: + """Returns a system stream for text processing. This usually returns + a wrapped stream around a binary stream returned from + :func:`get_binary_stream` but it also can take shortcuts for already + correctly configured streams. + + :param name: the name of the stream to open. Valid names are ``'stdin'``, + ``'stdout'`` and ``'stderr'`` + :param encoding: overrides the detected default encoding. + :param errors: overrides the default error mode. + """ + opener = text_streams.get(name) + if opener is None: + raise TypeError(f"Unknown standard stream '{name}'") + return opener(encoding, errors) + + +def open_file( + filename: str, + mode: str = "r", + encoding: t.Optional[str] = None, + errors: t.Optional[str] = "strict", + lazy: bool = False, + atomic: bool = False, +) -> t.IO: + """This is similar to how the :class:`File` works but for manual + usage. Files are opened non lazy by default. This can open regular + files as well as stdin/stdout if ``'-'`` is passed. + + If stdin/stdout is returned the stream is wrapped so that the context + manager will not close the stream accidentally. This makes it possible + to always use the function like this without having to worry to + accidentally close a standard stream:: + + with open_file(filename) as f: + ... + + .. versionadded:: 3.0 + + :param filename: the name of the file to open (or ``'-'`` for stdin/stdout). + :param mode: the mode in which to open the file. + :param encoding: the encoding to use. + :param errors: the error handling for this file. + :param lazy: can be flipped to true to open the file lazily. + :param atomic: in atomic mode writes go into a temporary file and it's + moved on close. + """ + if lazy: + return t.cast(t.IO, LazyFile(filename, mode, encoding, errors, atomic=atomic)) + f, should_close = open_stream(filename, mode, encoding, errors, atomic=atomic) + if not should_close: + f = t.cast(t.IO, KeepOpenFile(f)) + return f + + +def get_os_args() -> t.Sequence[str]: + """Returns the argument part of ``sys.argv``, removing the first + value which is the name of the script. + + .. deprecated:: 8.0 + Will be removed in Click 8.1. Access ``sys.argv[1:]`` directly + instead. + """ + import warnings + + warnings.warn( + "'get_os_args' is deprecated and will be removed in Click 8.1." + " Access 'sys.argv[1:]' directly instead.", + DeprecationWarning, + stacklevel=2, + ) + return sys.argv[1:] + + +def format_filename( + filename: t.Union[str, bytes, os.PathLike], shorten: bool = False +) -> str: + """Formats a filename for user display. The main purpose of this + function is to ensure that the filename can be displayed at all. This + will decode the filename to unicode if necessary in a way that it will + not fail. Optionally, it can shorten the filename to not include the + full path to the filename. + + :param filename: formats a filename for UI display. This will also convert + the filename into unicode without failing. + :param shorten: this optionally shortens the filename to strip of the + path that leads up to it. + """ + if shorten: + filename = os.path.basename(filename) + + return os.fsdecode(filename) + + +def get_app_dir(app_name: str, roaming: bool = True, force_posix: bool = False) -> str: + r"""Returns the config folder for the application. The default behavior + is to return whatever is most appropriate for the operating system. + + To give you an idea, for an app called ``"Foo Bar"``, something like + the following folders could be returned: + + Mac OS X: + ``~/Library/Application Support/Foo Bar`` + Mac OS X (POSIX): + ``~/.foo-bar`` + Unix: + ``~/.config/foo-bar`` + Unix (POSIX): + ``~/.foo-bar`` + Windows (roaming): + ``C:\Users\\AppData\Roaming\Foo Bar`` + Windows (not roaming): + ``C:\Users\\AppData\Local\Foo Bar`` + + .. versionadded:: 2.0 + + :param app_name: the application name. This should be properly capitalized + and can contain whitespace. + :param roaming: controls if the folder should be roaming or not on Windows. + Has no affect otherwise. + :param force_posix: if this is set to `True` then on any POSIX system the + folder will be stored in the home folder with a leading + dot instead of the XDG config home or darwin's + application support folder. + """ + if WIN: + key = "APPDATA" if roaming else "LOCALAPPDATA" + folder = os.environ.get(key) + if folder is None: + folder = os.path.expanduser("~") + return os.path.join(folder, app_name) + if force_posix: + return os.path.join(os.path.expanduser(f"~/.{_posixify(app_name)}")) + if sys.platform == "darwin": + return os.path.join( + os.path.expanduser("~/Library/Application Support"), app_name + ) + return os.path.join( + os.environ.get("XDG_CONFIG_HOME", os.path.expanduser("~/.config")), + _posixify(app_name), + ) + + +class PacifyFlushWrapper: + """This wrapper is used to catch and suppress BrokenPipeErrors resulting + from ``.flush()`` being called on broken pipe during the shutdown/final-GC + of the Python interpreter. Notably ``.flush()`` is always called on + ``sys.stdout`` and ``sys.stderr``. So as to have minimal impact on any + other cleanup code, and the case where the underlying file is not a broken + pipe, all calls and attributes are proxied. + """ + + def __init__(self, wrapped: t.IO) -> None: + self.wrapped = wrapped + + def flush(self) -> None: + try: + self.wrapped.flush() + except OSError as e: + import errno + + if e.errno != errno.EPIPE: + raise + + def __getattr__(self, attr: str) -> t.Any: + return getattr(self.wrapped, attr) + + +def _detect_program_name( + path: t.Optional[str] = None, _main: ModuleType = sys.modules["__main__"] +) -> str: + """Determine the command used to run the program, for use in help + text. If a file or entry point was executed, the file name is + returned. If ``python -m`` was used to execute a module or package, + ``python -m name`` is returned. + + This doesn't try to be too precise, the goal is to give a concise + name for help text. Files are only shown as their name without the + path. ``python`` is only shown for modules, and the full path to + ``sys.executable`` is not shown. + + :param path: The Python file being executed. Python puts this in + ``sys.argv[0]``, which is used by default. + :param _main: The ``__main__`` module. This should only be passed + during internal testing. + + .. versionadded:: 8.0 + Based on command args detection in the Werkzeug reloader. + + :meta private: + """ + if not path: + path = sys.argv[0] + + # The value of __package__ indicates how Python was called. It may + # not exist if a setuptools script is installed as an egg. It may be + # set incorrectly for entry points created with pip on Windows. + if getattr(_main, "__package__", None) is None or ( + os.name == "nt" + and _main.__package__ == "" + and not os.path.exists(path) + and os.path.exists(f"{path}.exe") + ): + # Executed a file, like "python app.py". + return os.path.basename(path) + + # Executed a module, like "python -m example". + # Rewritten by Python from "-m script" to "/path/to/script.py". + # Need to look at main module to determine how it was executed. + py_module = t.cast(str, _main.__package__) + name = os.path.splitext(os.path.basename(path))[0] + + # A submodule like "example.cli". + if name != "__main__": + py_module = f"{py_module}.{name}" + + return f"python -m {py_module.lstrip('.')}" + + +def _expand_args( + args: t.Iterable[str], + *, + user: bool = True, + env: bool = True, + glob_recursive: bool = True, +) -> t.List[str]: + """Simulate Unix shell expansion with Python functions. + + See :func:`glob.glob`, :func:`os.path.expanduser`, and + :func:`os.path.expandvars`. + + This intended for use on Windows, where the shell does not do any + expansion. It may not exactly match what a Unix shell would do. + + :param args: List of command line arguments to expand. + :param user: Expand user home directory. + :param env: Expand environment variables. + :param glob_recursive: ``**`` matches directories recursively. + + .. versionadded:: 8.0 + + :meta private: + """ + from glob import glob + + out = [] + + for arg in args: + if user: + arg = os.path.expanduser(arg) + + if env: + arg = os.path.expandvars(arg) + + matches = glob(arg, recursive=glob_recursive) + + if not matches: + out.append(arg) + else: + out.extend(matches) + + return out diff --git a/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/INSTALLER b/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/INSTALLER new file mode 100644 index 0000000..a1b589e --- /dev/null +++ b/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/INSTALLER @@ -0,0 +1 @@ +pip diff --git a/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/LICENSE.txt b/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/LICENSE.txt new file mode 100644 index 0000000..d645695 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/LICENSE.txt @@ -0,0 +1,202 @@ + + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright [yyyy] [name of copyright owner] + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. diff --git a/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/METADATA b/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/METADATA new file mode 100644 index 0000000..66e6b82 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/METADATA @@ -0,0 +1,98 @@ +Metadata-Version: 2.1 +Name: dataclasses +Version: 0.8 +Summary: A backport of the dataclasses module for Python 3.6 +Home-page: https://github.com/ericvsmith/dataclasses +Author: Eric V. Smith +Author-email: eric@python.org +License: Apache +Platform: UNKNOWN +Classifier: Development Status :: 4 - Beta +Classifier: Intended Audience :: Developers +Classifier: Topic :: Software Development :: Libraries :: Python Modules +Classifier: License :: OSI Approved :: Apache Software License +Classifier: Programming Language :: Python :: 3.6 +Requires-Python: >=3.6, <3.7 + +.. image:: https://img.shields.io/pypi/v/dataclasses.svg + :target: https://pypi.org/project/dataclasses/ + + +This is an implementation of PEP 557, Data Classes. It is a backport +for Python 3.6. Because dataclasses will be included in Python 3.7, +any discussion of dataclass features should occur on the python-dev +mailing list at https://mail.python.org/mailman/listinfo/python-dev. +At this point this repo should only be used for historical purposes +(it's where the original dataclasses discussions took place) and for +discussion of the actual backport to Python 3.6. + +See https://www.python.org/dev/peps/pep-0557/ for the details of how +Data Classes work. + +A test file can be found at +https://github.com/ericvsmith/dataclasses/blob/master/test/test_dataclasses.py, +or in the sdist file. + +Installation +------------- + +.. code-block:: + + pip install dataclasses + + +Example Usage +------------- + +.. code-block:: python + + from dataclasses import dataclass + + @dataclass + class InventoryItem: + name: str + unit_price: float + quantity_on_hand: int = 0 + + def total_cost(self) -> float: + return self.unit_price * self.quantity_on_hand + + item = InventoryItem('hammers', 10.49, 12) + print(item.total_cost()) + +Some additional tools can be found in dataclass_tools.py, included in +the sdist. + +Compatibility +------------- + +This backport assumes that dict objects retain their insertion order. +This is true in the language spec for Python 3.7 and greater. Since +this is a backport to Python 3.6, it raises an interesting question: +does that guarantee apply to 3.6? For CPython 3.6 it does. As of the +time of this writing, it's also true for all other Python +implementations that claim to be 3.6 compatible, of which there are +none. Any new 3.6 implementations are expected to have ordered dicts. +See the analysis at the end of this email: + +https://mail.python.org/pipermail/python-dev/2017-December/151325.html + +As of version 0.4, this code no longer works with Python 3.7. For 3.7, +use the built-in dataclasses module. + +Release History +--------------- + ++---------+------------+-------------------------------------+ +| Version | Date | Description | ++=========+============+=====================================+ +| 0.8 | 2020-11-13 | Fix ClassVar in .replace() | ++---------+------------+-------------------------------------+ +| 0.7 | 2019-10-20 | Require python 3.6 only | ++---------+------------+-------------------------------------+ +| 0.6 | 2018-05-17 | Equivalent to Python 3.7.0rc1 | ++---------+------------+-------------------------------------+ +| 0.5 | 2018-03-28 | Equivalent to Python 3.7.0b3 | ++---------+------------+-------------------------------------+ + + diff --git a/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/RECORD b/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/RECORD new file mode 100644 index 0000000..79d4d31 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/RECORD @@ -0,0 +1,8 @@ +__pycache__/dataclasses.cpython-36.pyc,, +dataclasses-0.8.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4 +dataclasses-0.8.dist-info/LICENSE.txt,sha256=z8d0m5b2O9McPEK1xHG_dWgUBT6EfBDz6wA0F7xSPTA,11358 +dataclasses-0.8.dist-info/METADATA,sha256=6kGy1NyHhp_Ef9tapnLb3rQIffoxLI5aClT4fWlUvIE,3328 +dataclasses-0.8.dist-info/RECORD,, +dataclasses-0.8.dist-info/WHEEL,sha256=g4nMs7d-Xl9-xC9XovUrsDHGXt-FT0E17Yqo92DEfvY,92 +dataclasses-0.8.dist-info/top_level.txt,sha256=g1h_lLdyfM-aL3-M-rWnNGxWv3ZmULp2HVvAlyZq5s0,12 +dataclasses.py,sha256=TBt2du4qkxxXdZ5olWFzwHpim2ch4j7kKJi2VS_qoZw,45499 diff --git a/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/WHEEL b/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/WHEEL new file mode 100644 index 0000000..b552003 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/WHEEL @@ -0,0 +1,5 @@ +Wheel-Version: 1.0 +Generator: bdist_wheel (0.34.2) +Root-Is-Purelib: true +Tag: py3-none-any + diff --git a/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/top_level.txt b/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/top_level.txt new file mode 100644 index 0000000..a46627b --- /dev/null +++ b/.venv/lib/python3.6/site-packages/dataclasses-0.8.dist-info/top_level.txt @@ -0,0 +1 @@ +dataclasses diff --git a/.venv/lib/python3.6/site-packages/dataclasses.py b/.venv/lib/python3.6/site-packages/dataclasses.py new file mode 100644 index 0000000..ddd59c6 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/dataclasses.py @@ -0,0 +1,1184 @@ +import re +import sys +import copy +import types +import inspect +import keyword + +__all__ = ['dataclass', + 'field', + 'Field', + 'FrozenInstanceError', + 'InitVar', + 'MISSING', + + # Helper functions. + 'fields', + 'asdict', + 'astuple', + 'make_dataclass', + 'replace', + 'is_dataclass', + ] + +# Conditions for adding methods. The boxes indicate what action the +# dataclass decorator takes. For all of these tables, when I talk +# about init=, repr=, eq=, order=, unsafe_hash=, or frozen=, I'm +# referring to the arguments to the @dataclass decorator. When +# checking if a dunder method already exists, I mean check for an +# entry in the class's __dict__. I never check to see if an attribute +# is defined in a base class. + +# Key: +# +=========+=========================================+ +# + Value | Meaning | +# +=========+=========================================+ +# | | No action: no method is added. | +# +---------+-----------------------------------------+ +# | add | Generated method is added. | +# +---------+-----------------------------------------+ +# | raise | TypeError is raised. | +# +---------+-----------------------------------------+ +# | None | Attribute is set to None. | +# +=========+=========================================+ + +# __init__ +# +# +--- init= parameter +# | +# v | | | +# | no | yes | <--- class has __init__ in __dict__? +# +=======+=======+=======+ +# | False | | | +# +-------+-------+-------+ +# | True | add | | <- the default +# +=======+=======+=======+ + +# __repr__ +# +# +--- repr= parameter +# | +# v | | | +# | no | yes | <--- class has __repr__ in __dict__? +# +=======+=======+=======+ +# | False | | | +# +-------+-------+-------+ +# | True | add | | <- the default +# +=======+=======+=======+ + + +# __setattr__ +# __delattr__ +# +# +--- frozen= parameter +# | +# v | | | +# | no | yes | <--- class has __setattr__ or __delattr__ in __dict__? +# +=======+=======+=======+ +# | False | | | <- the default +# +-------+-------+-------+ +# | True | add | raise | +# +=======+=======+=======+ +# Raise because not adding these methods would break the "frozen-ness" +# of the class. + +# __eq__ +# +# +--- eq= parameter +# | +# v | | | +# | no | yes | <--- class has __eq__ in __dict__? +# +=======+=======+=======+ +# | False | | | +# +-------+-------+-------+ +# | True | add | | <- the default +# +=======+=======+=======+ + +# __lt__ +# __le__ +# __gt__ +# __ge__ +# +# +--- order= parameter +# | +# v | | | +# | no | yes | <--- class has any comparison method in __dict__? +# +=======+=======+=======+ +# | False | | | <- the default +# +-------+-------+-------+ +# | True | add | raise | +# +=======+=======+=======+ +# Raise because to allow this case would interfere with using +# functools.total_ordering. + +# __hash__ + +# +------------------- unsafe_hash= parameter +# | +----------- eq= parameter +# | | +--- frozen= parameter +# | | | +# v v v | | | +# | no | yes | <--- class has explicitly defined __hash__ +# +=======+=======+=======+========+========+ +# | False | False | False | | | No __eq__, use the base class __hash__ +# +-------+-------+-------+--------+--------+ +# | False | False | True | | | No __eq__, use the base class __hash__ +# +-------+-------+-------+--------+--------+ +# | False | True | False | None | | <-- the default, not hashable +# +-------+-------+-------+--------+--------+ +# | False | True | True | add | | Frozen, so hashable, allows override +# +-------+-------+-------+--------+--------+ +# | True | False | False | add | raise | Has no __eq__, but hashable +# +-------+-------+-------+--------+--------+ +# | True | False | True | add | raise | Has no __eq__, but hashable +# +-------+-------+-------+--------+--------+ +# | True | True | False | add | raise | Not frozen, but hashable +# +-------+-------+-------+--------+--------+ +# | True | True | True | add | raise | Frozen, so hashable +# +=======+=======+=======+========+========+ +# For boxes that are blank, __hash__ is untouched and therefore +# inherited from the base class. If the base is object, then +# id-based hashing is used. +# +# Note that a class may already have __hash__=None if it specified an +# __eq__ method in the class body (not one that was created by +# @dataclass). +# +# See _hash_action (below) for a coded version of this table. + + +# Raised when an attempt is made to modify a frozen class. +class FrozenInstanceError(AttributeError): pass + +# A sentinel object for default values to signal that a default +# factory will be used. This is given a nice repr() which will appear +# in the function signature of dataclasses' constructors. +class _HAS_DEFAULT_FACTORY_CLASS: + def __repr__(self): + return '' +_HAS_DEFAULT_FACTORY = _HAS_DEFAULT_FACTORY_CLASS() + +# A sentinel object to detect if a parameter is supplied or not. Use +# a class to give it a better repr. +class _MISSING_TYPE: + pass +MISSING = _MISSING_TYPE() + +# Since most per-field metadata will be unused, create an empty +# read-only proxy that can be shared among all fields. +_EMPTY_METADATA = types.MappingProxyType({}) + +# Markers for the various kinds of fields and pseudo-fields. +class _FIELD_BASE: + def __init__(self, name): + self.name = name + def __repr__(self): + return self.name +_FIELD = _FIELD_BASE('_FIELD') +_FIELD_CLASSVAR = _FIELD_BASE('_FIELD_CLASSVAR') +_FIELD_INITVAR = _FIELD_BASE('_FIELD_INITVAR') + +# The name of an attribute on the class where we store the Field +# objects. Also used to check if a class is a Data Class. +_FIELDS = '__dataclass_fields__' + +# The name of an attribute on the class that stores the parameters to +# @dataclass. +_PARAMS = '__dataclass_params__' + +# The name of the function, that if it exists, is called at the end of +# __init__. +_POST_INIT_NAME = '__post_init__' + +# String regex that string annotations for ClassVar or InitVar must match. +# Allows "identifier.identifier[" or "identifier[". +# https://bugs.python.org/issue33453 for details. +_MODULE_IDENTIFIER_RE = re.compile(r'^(?:\s*(\w+)\s*\.)?\s*(\w+)') + +class _InitVarMeta(type): + def __getitem__(self, params): + return self + +class InitVar(metaclass=_InitVarMeta): + pass + + +# Instances of Field are only ever created from within this module, +# and only from the field() function, although Field instances are +# exposed externally as (conceptually) read-only objects. +# +# name and type are filled in after the fact, not in __init__. +# They're not known at the time this class is instantiated, but it's +# convenient if they're available later. +# +# When cls._FIELDS is filled in with a list of Field objects, the name +# and type fields will have been populated. +class Field: + __slots__ = ('name', + 'type', + 'default', + 'default_factory', + 'repr', + 'hash', + 'init', + 'compare', + 'metadata', + '_field_type', # Private: not to be used by user code. + ) + + def __init__(self, default, default_factory, init, repr, hash, compare, + metadata): + self.name = None + self.type = None + self.default = default + self.default_factory = default_factory + self.init = init + self.repr = repr + self.hash = hash + self.compare = compare + self.metadata = (_EMPTY_METADATA + if metadata is None or len(metadata) == 0 else + types.MappingProxyType(metadata)) + self._field_type = None + + def __repr__(self): + return ('Field(' + f'name={self.name!r},' + f'type={self.type!r},' + f'default={self.default!r},' + f'default_factory={self.default_factory!r},' + f'init={self.init!r},' + f'repr={self.repr!r},' + f'hash={self.hash!r},' + f'compare={self.compare!r},' + f'metadata={self.metadata!r},' + f'_field_type={self._field_type}' + ')') + + # This is used to support the PEP 487 __set_name__ protocol in the + # case where we're using a field that contains a descriptor as a + # defaul value. For details on __set_name__, see + # https://www.python.org/dev/peps/pep-0487/#implementation-details. + # + # Note that in _process_class, this Field object is overwritten + # with the default value, so the end result is a descriptor that + # had __set_name__ called on it at the right time. + def __set_name__(self, owner, name): + func = getattr(type(self.default), '__set_name__', None) + if func: + # There is a __set_name__ method on the descriptor, call + # it. + func(self.default, owner, name) + + +class _DataclassParams: + __slots__ = ('init', + 'repr', + 'eq', + 'order', + 'unsafe_hash', + 'frozen', + ) + + def __init__(self, init, repr, eq, order, unsafe_hash, frozen): + self.init = init + self.repr = repr + self.eq = eq + self.order = order + self.unsafe_hash = unsafe_hash + self.frozen = frozen + + def __repr__(self): + return ('_DataclassParams(' + f'init={self.init!r},' + f'repr={self.repr!r},' + f'eq={self.eq!r},' + f'order={self.order!r},' + f'unsafe_hash={self.unsafe_hash!r},' + f'frozen={self.frozen!r}' + ')') + + +# This function is used instead of exposing Field creation directly, +# so that a type checker can be told (via overloads) that this is a +# function whose type depends on its parameters. +def field(*, default=MISSING, default_factory=MISSING, init=True, repr=True, + hash=None, compare=True, metadata=None): + """Return an object to identify dataclass fields. + + default is the default value of the field. default_factory is a + 0-argument function called to initialize a field's value. If init + is True, the field will be a parameter to the class's __init__() + function. If repr is True, the field will be included in the + object's repr(). If hash is True, the field will be included in + the object's hash(). If compare is True, the field will be used + in comparison functions. metadata, if specified, must be a + mapping which is stored but not otherwise examined by dataclass. + + It is an error to specify both default and default_factory. + """ + + if default is not MISSING and default_factory is not MISSING: + raise ValueError('cannot specify both default and default_factory') + return Field(default, default_factory, init, repr, hash, compare, + metadata) + + +def _tuple_str(obj_name, fields): + # Return a string representing each field of obj_name as a tuple + # member. So, if fields is ['x', 'y'] and obj_name is "self", + # return "(self.x,self.y)". + + # Special case for the 0-tuple. + if not fields: + return '()' + # Note the trailing comma, needed if this turns out to be a 1-tuple. + return f'({",".join([f"{obj_name}.{f.name}" for f in fields])},)' + + +def _create_fn(name, args, body, *, globals=None, locals=None, + return_type=MISSING): + # Note that we mutate locals when exec() is called. Caller + # beware! The only callers are internal to this module, so no + # worries about external callers. + if locals is None: + locals = {} + return_annotation = '' + if return_type is not MISSING: + locals['_return_type'] = return_type + return_annotation = '->_return_type' + args = ','.join(args) + body = '\n'.join(f' {b}' for b in body) + + # Compute the text of the entire function. + txt = f'def {name}({args}){return_annotation}:\n{body}' + + exec(txt, globals, locals) + return locals[name] + + +def _field_assign(frozen, name, value, self_name): + # If we're a frozen class, then assign to our fields in __init__ + # via object.__setattr__. Otherwise, just use a simple + # assignment. + # + # self_name is what "self" is called in this function: don't + # hard-code "self", since that might be a field name. + if frozen: + return f'object.__setattr__({self_name},{name!r},{value})' + return f'{self_name}.{name}={value}' + + +def _field_init(f, frozen, globals, self_name): + # Return the text of the line in the body of __init__ that will + # initialize this field. + + default_name = f'_dflt_{f.name}' + if f.default_factory is not MISSING: + if f.init: + # This field has a default factory. If a parameter is + # given, use it. If not, call the factory. + globals[default_name] = f.default_factory + value = (f'{default_name}() ' + f'if {f.name} is _HAS_DEFAULT_FACTORY ' + f'else {f.name}') + else: + # This is a field that's not in the __init__ params, but + # has a default factory function. It needs to be + # initialized here by calling the factory function, + # because there's no other way to initialize it. + + # For a field initialized with a default=defaultvalue, the + # class dict just has the default value + # (cls.fieldname=defaultvalue). But that won't work for a + # default factory, the factory must be called in __init__ + # and we must assign that to self.fieldname. We can't + # fall back to the class dict's value, both because it's + # not set, and because it might be different per-class + # (which, after all, is why we have a factory function!). + + globals[default_name] = f.default_factory + value = f'{default_name}()' + else: + # No default factory. + if f.init: + if f.default is MISSING: + # There's no default, just do an assignment. + value = f.name + elif f.default is not MISSING: + globals[default_name] = f.default + value = f.name + else: + # This field does not need initialization. Signify that + # to the caller by returning None. + return None + + # Only test this now, so that we can create variables for the + # default. However, return None to signify that we're not going + # to actually do the assignment statement for InitVars. + if f._field_type is _FIELD_INITVAR: + return None + + # Now, actually generate the field assignment. + return _field_assign(frozen, f.name, value, self_name) + + +def _init_param(f): + # Return the __init__ parameter string for this field. For + # example, the equivalent of 'x:int=3' (except instead of 'int', + # reference a variable set to int, and instead of '3', reference a + # variable set to 3). + if f.default is MISSING and f.default_factory is MISSING: + # There's no default, and no default_factory, just output the + # variable name and type. + default = '' + elif f.default is not MISSING: + # There's a default, this will be the name that's used to look + # it up. + default = f'=_dflt_{f.name}' + elif f.default_factory is not MISSING: + # There's a factory function. Set a marker. + default = '=_HAS_DEFAULT_FACTORY' + return f'{f.name}:_type_{f.name}{default}' + + +def _init_fn(fields, frozen, has_post_init, self_name): + # fields contains both real fields and InitVar pseudo-fields. + + # Make sure we don't have fields without defaults following fields + # with defaults. This actually would be caught when exec-ing the + # function source code, but catching it here gives a better error + # message, and future-proofs us in case we build up the function + # using ast. + seen_default = False + for f in fields: + # Only consider fields in the __init__ call. + if f.init: + if not (f.default is MISSING and f.default_factory is MISSING): + seen_default = True + elif seen_default: + raise TypeError(f'non-default argument {f.name!r} ' + 'follows default argument') + + globals = {'MISSING': MISSING, + '_HAS_DEFAULT_FACTORY': _HAS_DEFAULT_FACTORY} + + body_lines = [] + for f in fields: + line = _field_init(f, frozen, globals, self_name) + # line is None means that this field doesn't require + # initialization (it's a pseudo-field). Just skip it. + if line: + body_lines.append(line) + + # Does this class have a post-init function? + if has_post_init: + params_str = ','.join(f.name for f in fields + if f._field_type is _FIELD_INITVAR) + body_lines.append(f'{self_name}.{_POST_INIT_NAME}({params_str})') + + # If no body lines, use 'pass'. + if not body_lines: + body_lines = ['pass'] + + locals = {f'_type_{f.name}': f.type for f in fields} + return _create_fn('__init__', + [self_name] + [_init_param(f) for f in fields if f.init], + body_lines, + locals=locals, + globals=globals, + return_type=None) + + +def _repr_fn(fields): + return _create_fn('__repr__', + ('self',), + ['return self.__class__.__qualname__ + f"(' + + ', '.join([f"{f.name}={{self.{f.name}!r}}" + for f in fields]) + + ')"']) + + +def _frozen_get_del_attr(cls, fields): + # XXX: globals is modified on the first call to _create_fn, then + # the modified version is used in the second call. Is this okay? + globals = {'cls': cls, + 'FrozenInstanceError': FrozenInstanceError} + if fields: + fields_str = '(' + ','.join(repr(f.name) for f in fields) + ',)' + else: + # Special case for the zero-length tuple. + fields_str = '()' + return (_create_fn('__setattr__', + ('self', 'name', 'value'), + (f'if type(self) is cls or name in {fields_str}:', + ' raise FrozenInstanceError(f"cannot assign to field {name!r}")', + f'super(cls, self).__setattr__(name, value)'), + globals=globals), + _create_fn('__delattr__', + ('self', 'name'), + (f'if type(self) is cls or name in {fields_str}:', + ' raise FrozenInstanceError(f"cannot delete field {name!r}")', + f'super(cls, self).__delattr__(name)'), + globals=globals), + ) + + +def _cmp_fn(name, op, self_tuple, other_tuple): + # Create a comparison function. If the fields in the object are + # named 'x' and 'y', then self_tuple is the string + # '(self.x,self.y)' and other_tuple is the string + # '(other.x,other.y)'. + + return _create_fn(name, + ('self', 'other'), + [ 'if other.__class__ is self.__class__:', + f' return {self_tuple}{op}{other_tuple}', + 'return NotImplemented']) + + +def _hash_fn(fields): + self_tuple = _tuple_str('self', fields) + return _create_fn('__hash__', + ('self',), + [f'return hash({self_tuple})']) + + +def _is_classvar(a_type, typing): + # This test uses a typing internal class, but it's the best way to + # test if this is a ClassVar. + return type(a_type) is typing._ClassVar + + +def _is_initvar(a_type, dataclasses): + # The module we're checking against is the module we're + # currently in (dataclasses.py). + return a_type is dataclasses.InitVar + + +def _is_type(annotation, cls, a_module, a_type, is_type_predicate): + # Given a type annotation string, does it refer to a_type in + # a_module? For example, when checking that annotation denotes a + # ClassVar, then a_module is typing, and a_type is + # typing.ClassVar. + + # It's possible to look up a_module given a_type, but it involves + # looking in sys.modules (again!), and seems like a waste since + # the caller already knows a_module. + + # - annotation is a string type annotation + # - cls is the class that this annotation was found in + # - a_module is the module we want to match + # - a_type is the type in that module we want to match + # - is_type_predicate is a function called with (obj, a_module) + # that determines if obj is of the desired type. + + # Since this test does not do a local namespace lookup (and + # instead only a module (global) lookup), there are some things it + # gets wrong. + + # With string annotations, cv0 will be detected as a ClassVar: + # CV = ClassVar + # @dataclass + # class C0: + # cv0: CV + + # But in this example cv1 will not be detected as a ClassVar: + # @dataclass + # class C1: + # CV = ClassVar + # cv1: CV + + # In C1, the code in this function (_is_type) will look up "CV" in + # the module and not find it, so it will not consider cv1 as a + # ClassVar. This is a fairly obscure corner case, and the best + # way to fix it would be to eval() the string "CV" with the + # correct global and local namespaces. However that would involve + # a eval() penalty for every single field of every dataclass + # that's defined. It was judged not worth it. + + match = _MODULE_IDENTIFIER_RE.match(annotation) + if match: + ns = None + module_name = match.group(1) + if not module_name: + # No module name, assume the class's module did + # "from dataclasses import InitVar". + ns = sys.modules.get(cls.__module__).__dict__ + else: + # Look up module_name in the class's module. + module = sys.modules.get(cls.__module__) + if module and module.__dict__.get(module_name) is a_module: + ns = sys.modules.get(a_type.__module__).__dict__ + if ns and is_type_predicate(ns.get(match.group(2)), a_module): + return True + return False + + +def _get_field(cls, a_name, a_type): + # Return a Field object for this field name and type. ClassVars + # and InitVars are also returned, but marked as such (see + # f._field_type). + + # If the default value isn't derived from Field, then it's only a + # normal default value. Convert it to a Field(). + default = getattr(cls, a_name, MISSING) + if isinstance(default, Field): + f = default + else: + if isinstance(default, types.MemberDescriptorType): + # This is a field in __slots__, so it has no default value. + default = MISSING + f = field(default=default) + + # Only at this point do we know the name and the type. Set them. + f.name = a_name + f.type = a_type + + # Assume it's a normal field until proven otherwise. We're next + # going to decide if it's a ClassVar or InitVar, everything else + # is just a normal field. + f._field_type = _FIELD + + # In addition to checking for actual types here, also check for + # string annotations. get_type_hints() won't always work for us + # (see https://github.com/python/typing/issues/508 for example), + # plus it's expensive and would require an eval for every stirng + # annotation. So, make a best effort to see if this is a ClassVar + # or InitVar using regex's and checking that the thing referenced + # is actually of the correct type. + + # For the complete discussion, see https://bugs.python.org/issue33453 + + # If typing has not been imported, then it's impossible for any + # annotation to be a ClassVar. So, only look for ClassVar if + # typing has been imported by any module (not necessarily cls's + # module). + typing = sys.modules.get('typing') + if typing: + if (_is_classvar(a_type, typing) + or (isinstance(f.type, str) + and _is_type(f.type, cls, typing, typing.ClassVar, + _is_classvar))): + f._field_type = _FIELD_CLASSVAR + + # If the type is InitVar, or if it's a matching string annotation, + # then it's an InitVar. + if f._field_type is _FIELD: + # The module we're checking against is the module we're + # currently in (dataclasses.py). + dataclasses = sys.modules[__name__] + if (_is_initvar(a_type, dataclasses) + or (isinstance(f.type, str) + and _is_type(f.type, cls, dataclasses, dataclasses.InitVar, + _is_initvar))): + f._field_type = _FIELD_INITVAR + + # Validations for individual fields. This is delayed until now, + # instead of in the Field() constructor, since only here do we + # know the field name, which allows for better error reporting. + + # Special restrictions for ClassVar and InitVar. + if f._field_type in (_FIELD_CLASSVAR, _FIELD_INITVAR): + if f.default_factory is not MISSING: + raise TypeError(f'field {f.name} cannot have a ' + 'default factory') + # Should I check for other field settings? default_factory + # seems the most serious to check for. Maybe add others. For + # example, how about init=False (or really, + # init=)? It makes no sense for + # ClassVar and InitVar to specify init=. + + # For real fields, disallow mutable defaults for known types. + if f._field_type is _FIELD and isinstance(f.default, (list, dict, set)): + raise ValueError(f'mutable default {type(f.default)} for field ' + f'{f.name} is not allowed: use default_factory') + + return f + + +def _set_new_attribute(cls, name, value): + # Never overwrites an existing attribute. Returns True if the + # attribute already exists. + if name in cls.__dict__: + return True + setattr(cls, name, value) + return False + + +# Decide if/how we're going to create a hash function. Key is +# (unsafe_hash, eq, frozen, does-hash-exist). Value is the action to +# take. The common case is to do nothing, so instead of providing a +# function that is a no-op, use None to signify that. + +def _hash_set_none(cls, fields): + return None + +def _hash_add(cls, fields): + flds = [f for f in fields if (f.compare if f.hash is None else f.hash)] + return _hash_fn(flds) + +def _hash_exception(cls, fields): + # Raise an exception. + raise TypeError(f'Cannot overwrite attribute __hash__ ' + f'in class {cls.__name__}') + +# +# +-------------------------------------- unsafe_hash? +# | +------------------------------- eq? +# | | +------------------------ frozen? +# | | | +---------------- has-explicit-hash? +# | | | | +# | | | | +------- action +# | | | | | +# v v v v v +_hash_action = {(False, False, False, False): None, + (False, False, False, True ): None, + (False, False, True, False): None, + (False, False, True, True ): None, + (False, True, False, False): _hash_set_none, + (False, True, False, True ): None, + (False, True, True, False): _hash_add, + (False, True, True, True ): None, + (True, False, False, False): _hash_add, + (True, False, False, True ): _hash_exception, + (True, False, True, False): _hash_add, + (True, False, True, True ): _hash_exception, + (True, True, False, False): _hash_add, + (True, True, False, True ): _hash_exception, + (True, True, True, False): _hash_add, + (True, True, True, True ): _hash_exception, + } +# See https://bugs.python.org/issue32929#msg312829 for an if-statement +# version of this table. + + +def _process_class(cls, init, repr, eq, order, unsafe_hash, frozen): + # Now that dicts retain insertion order, there's no reason to use + # an ordered dict. I am leveraging that ordering here, because + # derived class fields overwrite base class fields, but the order + # is defined by the base class, which is found first. + fields = {} + + setattr(cls, _PARAMS, _DataclassParams(init, repr, eq, order, + unsafe_hash, frozen)) + + # Find our base classes in reverse MRO order, and exclude + # ourselves. In reversed order so that more derived classes + # override earlier field definitions in base classes. As long as + # we're iterating over them, see if any are frozen. + any_frozen_base = False + has_dataclass_bases = False + for b in cls.__mro__[-1:0:-1]: + # Only process classes that have been processed by our + # decorator. That is, they have a _FIELDS attribute. + base_fields = getattr(b, _FIELDS, None) + if base_fields: + has_dataclass_bases = True + for f in base_fields.values(): + fields[f.name] = f + if getattr(b, _PARAMS).frozen: + any_frozen_base = True + + # Annotations that are defined in this class (not in base + # classes). If __annotations__ isn't present, then this class + # adds no new annotations. We use this to compute fields that are + # added by this class. + # + # Fields are found from cls_annotations, which is guaranteed to be + # ordered. Default values are from class attributes, if a field + # has a default. If the default value is a Field(), then it + # contains additional info beyond (and possibly including) the + # actual default value. Pseudo-fields ClassVars and InitVars are + # included, despite the fact that they're not real fields. That's + # dealt with later. + cls_annotations = cls.__dict__.get('__annotations__', {}) + + # Now find fields in our class. While doing so, validate some + # things, and set the default values (as class attributes) where + # we can. + cls_fields = [_get_field(cls, name, type) + for name, type in cls_annotations.items()] + for f in cls_fields: + fields[f.name] = f + + # If the class attribute (which is the default value for this + # field) exists and is of type 'Field', replace it with the + # real default. This is so that normal class introspection + # sees a real default value, not a Field. + if isinstance(getattr(cls, f.name, None), Field): + if f.default is MISSING: + # If there's no default, delete the class attribute. + # This happens if we specify field(repr=False), for + # example (that is, we specified a field object, but + # no default value). Also if we're using a default + # factory. The class attribute should not be set at + # all in the post-processed class. + delattr(cls, f.name) + else: + setattr(cls, f.name, f.default) + + # Do we have any Field members that don't also have annotations? + for name, value in cls.__dict__.items(): + if isinstance(value, Field) and not name in cls_annotations: + raise TypeError(f'{name!r} is a field but has no type annotation') + + # Check rules that apply if we are derived from any dataclasses. + if has_dataclass_bases: + # Raise an exception if any of our bases are frozen, but we're not. + if any_frozen_base and not frozen: + raise TypeError('cannot inherit non-frozen dataclass from a ' + 'frozen one') + + # Raise an exception if we're frozen, but none of our bases are. + if not any_frozen_base and frozen: + raise TypeError('cannot inherit frozen dataclass from a ' + 'non-frozen one') + + # Remember all of the fields on our class (including bases). This + # also marks this class as being a dataclass. + setattr(cls, _FIELDS, fields) + + # Was this class defined with an explicit __hash__? Note that if + # __eq__ is defined in this class, then python will automatically + # set __hash__ to None. This is a heuristic, as it's possible + # that such a __hash__ == None was not auto-generated, but it + # close enough. + class_hash = cls.__dict__.get('__hash__', MISSING) + has_explicit_hash = not (class_hash is MISSING or + (class_hash is None and '__eq__' in cls.__dict__)) + + # If we're generating ordering methods, we must be generating the + # eq methods. + if order and not eq: + raise ValueError('eq must be true if order is true') + + if init: + # Does this class have a post-init function? + has_post_init = hasattr(cls, _POST_INIT_NAME) + + # Include InitVars and regular fields (so, not ClassVars). + flds = [f for f in fields.values() + if f._field_type in (_FIELD, _FIELD_INITVAR)] + _set_new_attribute(cls, '__init__', + _init_fn(flds, + frozen, + has_post_init, + # The name to use for the "self" + # param in __init__. Use "self" + # if possible. + '__dataclass_self__' if 'self' in fields + else 'self', + )) + + # Get the fields as a list, and include only real fields. This is + # used in all of the following methods. + field_list = [f for f in fields.values() if f._field_type is _FIELD] + + if repr: + flds = [f for f in field_list if f.repr] + _set_new_attribute(cls, '__repr__', _repr_fn(flds)) + + if eq: + # Create _eq__ method. There's no need for a __ne__ method, + # since python will call __eq__ and negate it. + flds = [f for f in field_list if f.compare] + self_tuple = _tuple_str('self', flds) + other_tuple = _tuple_str('other', flds) + _set_new_attribute(cls, '__eq__', + _cmp_fn('__eq__', '==', + self_tuple, other_tuple)) + + if order: + # Create and set the ordering methods. + flds = [f for f in field_list if f.compare] + self_tuple = _tuple_str('self', flds) + other_tuple = _tuple_str('other', flds) + for name, op in [('__lt__', '<'), + ('__le__', '<='), + ('__gt__', '>'), + ('__ge__', '>='), + ]: + if _set_new_attribute(cls, name, + _cmp_fn(name, op, self_tuple, other_tuple)): + raise TypeError(f'Cannot overwrite attribute {name} ' + f'in class {cls.__name__}. Consider using ' + 'functools.total_ordering') + + if frozen: + for fn in _frozen_get_del_attr(cls, field_list): + if _set_new_attribute(cls, fn.__name__, fn): + raise TypeError(f'Cannot overwrite attribute {fn.__name__} ' + f'in class {cls.__name__}') + + # Decide if/how we're going to create a hash function. + hash_action = _hash_action[bool(unsafe_hash), + bool(eq), + bool(frozen), + has_explicit_hash] + if hash_action: + # No need to call _set_new_attribute here, since by the time + # we're here the overwriting is unconditional. + cls.__hash__ = hash_action(cls, field_list) + + if not getattr(cls, '__doc__'): + # Create a class doc-string. + cls.__doc__ = (cls.__name__ + + str(inspect.signature(cls)).replace(' -> None', '')) + + return cls + + +# _cls should never be specified by keyword, so start it with an +# underscore. The presence of _cls is used to detect if this +# decorator is being called with parameters or not. +def dataclass(_cls=None, *, init=True, repr=True, eq=True, order=False, + unsafe_hash=False, frozen=False): + """Returns the same class as was passed in, with dunder methods + added based on the fields defined in the class. + + Examines PEP 526 __annotations__ to determine fields. + + If init is true, an __init__() method is added to the class. If + repr is true, a __repr__() method is added. If order is true, rich + comparison dunder methods are added. If unsafe_hash is true, a + __hash__() method function is added. If frozen is true, fields may + not be assigned to after instance creation. + """ + + def wrap(cls): + return _process_class(cls, init, repr, eq, order, unsafe_hash, frozen) + + # See if we're being called as @dataclass or @dataclass(). + if _cls is None: + # We're called with parens. + return wrap + + # We're called as @dataclass without parens. + return wrap(_cls) + + +def fields(class_or_instance): + """Return a tuple describing the fields of this dataclass. + + Accepts a dataclass or an instance of one. Tuple elements are of + type Field. + """ + + # Might it be worth caching this, per class? + try: + fields = getattr(class_or_instance, _FIELDS) + except AttributeError: + raise TypeError('must be called with a dataclass type or instance') + + # Exclude pseudo-fields. Note that fields is sorted by insertion + # order, so the order of the tuple is as the fields were defined. + return tuple(f for f in fields.values() if f._field_type is _FIELD) + + +def _is_dataclass_instance(obj): + """Returns True if obj is an instance of a dataclass.""" + return not isinstance(obj, type) and hasattr(obj, _FIELDS) + + +def is_dataclass(obj): + """Returns True if obj is a dataclass or an instance of a + dataclass.""" + return hasattr(obj, _FIELDS) + + +def asdict(obj, *, dict_factory=dict): + """Return the fields of a dataclass instance as a new dictionary mapping + field names to field values. + + Example usage: + + @dataclass + class C: + x: int + y: int + + c = C(1, 2) + assert asdict(c) == {'x': 1, 'y': 2} + + If given, 'dict_factory' will be used instead of built-in dict. + The function applies recursively to field values that are + dataclass instances. This will also look into built-in containers: + tuples, lists, and dicts. + """ + if not _is_dataclass_instance(obj): + raise TypeError("asdict() should be called on dataclass instances") + return _asdict_inner(obj, dict_factory) + + +def _asdict_inner(obj, dict_factory): + if _is_dataclass_instance(obj): + result = [] + for f in fields(obj): + value = _asdict_inner(getattr(obj, f.name), dict_factory) + result.append((f.name, value)) + return dict_factory(result) + elif isinstance(obj, (list, tuple)): + return type(obj)(_asdict_inner(v, dict_factory) for v in obj) + elif isinstance(obj, dict): + return type(obj)((_asdict_inner(k, dict_factory), _asdict_inner(v, dict_factory)) + for k, v in obj.items()) + else: + return copy.deepcopy(obj) + + +def astuple(obj, *, tuple_factory=tuple): + """Return the fields of a dataclass instance as a new tuple of field values. + + Example usage:: + + @dataclass + class C: + x: int + y: int + + c = C(1, 2) + assert astuple(c) == (1, 2) + + If given, 'tuple_factory' will be used instead of built-in tuple. + The function applies recursively to field values that are + dataclass instances. This will also look into built-in containers: + tuples, lists, and dicts. + """ + + if not _is_dataclass_instance(obj): + raise TypeError("astuple() should be called on dataclass instances") + return _astuple_inner(obj, tuple_factory) + + +def _astuple_inner(obj, tuple_factory): + if _is_dataclass_instance(obj): + result = [] + for f in fields(obj): + value = _astuple_inner(getattr(obj, f.name), tuple_factory) + result.append(value) + return tuple_factory(result) + elif isinstance(obj, (list, tuple)): + return type(obj)(_astuple_inner(v, tuple_factory) for v in obj) + elif isinstance(obj, dict): + return type(obj)((_astuple_inner(k, tuple_factory), _astuple_inner(v, tuple_factory)) + for k, v in obj.items()) + else: + return copy.deepcopy(obj) + + +def make_dataclass(cls_name, fields, *, bases=(), namespace=None, init=True, + repr=True, eq=True, order=False, unsafe_hash=False, + frozen=False): + """Return a new dynamically created dataclass. + + The dataclass name will be 'cls_name'. 'fields' is an iterable + of either (name), (name, type) or (name, type, Field) objects. If type is + omitted, use the string 'typing.Any'. Field objects are created by + the equivalent of calling 'field(name, type [, Field-info])'. + + C = make_dataclass('C', ['x', ('y', int), ('z', int, field(init=False))], bases=(Base,)) + + is equivalent to: + + @dataclass + class C(Base): + x: 'typing.Any' + y: int + z: int = field(init=False) + + For the bases and namespace parameters, see the builtin type() function. + + The parameters init, repr, eq, order, unsafe_hash, and frozen are passed to + dataclass(). + """ + + if namespace is None: + namespace = {} + else: + # Copy namespace since we're going to mutate it. + namespace = namespace.copy() + + # While we're looking through the field names, validate that they + # are identifiers, are not keywords, and not duplicates. + seen = set() + anns = {} + for item in fields: + if isinstance(item, str): + name = item + tp = 'typing.Any' + elif len(item) == 2: + name, tp, = item + elif len(item) == 3: + name, tp, spec = item + namespace[name] = spec + else: + raise TypeError(f'Invalid field: {item!r}') + + if not isinstance(name, str) or not name.isidentifier(): + raise TypeError(f'Field names must be valid identifers: {name!r}') + if keyword.iskeyword(name): + raise TypeError(f'Field names must not be keywords: {name!r}') + if name in seen: + raise TypeError(f'Field name duplicated: {name!r}') + + seen.add(name) + anns[name] = tp + + namespace['__annotations__'] = anns + # We use `types.new_class()` instead of simply `type()` to allow dynamic creation + # of generic dataclassses. + cls = types.new_class(cls_name, bases, {}, lambda ns: ns.update(namespace)) + return dataclass(cls, init=init, repr=repr, eq=eq, order=order, + unsafe_hash=unsafe_hash, frozen=frozen) + + +def replace(obj, **changes): + """Return a new object replacing specified fields with new values. + + This is especially useful for frozen classes. Example usage: + + @dataclass(frozen=True) + class C: + x: int + y: int + + c = C(1, 2) + c1 = replace(c, x=3) + assert c1.x == 3 and c1.y == 2 + """ + + # We're going to mutate 'changes', but that's okay because it's a + # new dict, even if called with 'replace(obj, **my_changes)'. + + if not _is_dataclass_instance(obj): + raise TypeError("replace() should be called on dataclass instances") + + # It's an error to have init=False fields in 'changes'. + # If a field is not in 'changes', read its value from the provided obj. + + for f in getattr(obj, _FIELDS).values(): + # Only consider normal fields or InitVars. + if f._field_type is _FIELD_CLASSVAR: + continue + + if not f.init: + # Error if this field is specified in changes. + if f.name in changes: + raise ValueError(f'field {f.name} is declared with ' + 'init=False, it cannot be specified with ' + 'replace()') + continue + + if f.name not in changes: + if f._field_type is _FIELD_INITVAR: + raise ValueError(f"InitVar {f.name!r} " + 'must be specified with replace()') + changes[f.name] = getattr(obj, f.name) + + # Create the new object, which calls __init__() and + # __post_init__() (if defined), using all of the init fields we've + # added and/or left in 'changes'. If there are values supplied in + # changes that aren't fields, this will correctly raise a + # TypeError. + return obj.__class__(**changes) diff --git a/.venv/lib/python3.6/site-packages/easy_install.py b/.venv/lib/python3.6/site-packages/easy_install.py new file mode 100644 index 0000000..d87e984 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/easy_install.py @@ -0,0 +1,5 @@ +"""Run the EasyInstall command""" + +if __name__ == '__main__': + from setuptools.command.easy_install import main + main() diff --git a/.venv/lib/python3.6/site-packages/flask/__init__.py b/.venv/lib/python3.6/site-packages/flask/__init__.py new file mode 100644 index 0000000..43b5468 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/flask/__init__.py @@ -0,0 +1,46 @@ +from markupsafe import escape +from markupsafe import Markup +from werkzeug.exceptions import abort as abort +from werkzeug.utils import redirect as redirect + +from . import json as json +from .app import Flask as Flask +from .app import Request as Request +from .app import Response as Response +from .blueprints import Blueprint as Blueprint +from .config import Config as Config +from .ctx import after_this_request as after_this_request +from .ctx import copy_current_request_context as copy_current_request_context +from .ctx import has_app_context as has_app_context +from .ctx import has_request_context as has_request_context +from .globals import _app_ctx_stack as _app_ctx_stack +from .globals import _request_ctx_stack as _request_ctx_stack +from .globals import current_app as current_app +from .globals import g as g +from .globals import request as request +from .globals import session as session +from .helpers import flash as flash +from .helpers import get_flashed_messages as get_flashed_messages +from .helpers import get_template_attribute as get_template_attribute +from .helpers import make_response as make_response +from .helpers import safe_join as safe_join +from .helpers import send_file as send_file +from .helpers import send_from_directory as send_from_directory +from .helpers import stream_with_context as stream_with_context +from .helpers import url_for as url_for +from .json import jsonify as jsonify +from .signals import appcontext_popped as appcontext_popped +from .signals import appcontext_pushed as appcontext_pushed +from .signals import appcontext_tearing_down as appcontext_tearing_down +from .signals import before_render_template as before_render_template +from .signals import got_request_exception as got_request_exception +from .signals import message_flashed as message_flashed +from .signals import request_finished as request_finished +from .signals import request_started as request_started +from .signals import request_tearing_down as request_tearing_down +from .signals import signals_available as signals_available +from .signals import template_rendered as template_rendered +from .templating import render_template as render_template +from .templating import render_template_string as render_template_string + +__version__ = "2.0.2" diff --git a/.venv/lib/python3.6/site-packages/flask/__main__.py b/.venv/lib/python3.6/site-packages/flask/__main__.py new file mode 100644 index 0000000..4e28416 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/flask/__main__.py @@ -0,0 +1,3 @@ +from .cli import main + +main() diff --git a/.venv/lib/python3.6/site-packages/flask/__pycache__/__init__.cpython-36.pyc b/.venv/lib/python3.6/site-packages/flask/__pycache__/__init__.cpython-36.pyc new file mode 100644 index 0000000000000000000000000000000000000000..c1e922ad06ee182aaf81933a317335eed158a1b6 GIT binary patch literal 1893 zcmbu9xo#sz5Qce39EzuSh`R5SlE~3YUfF?R7&hQ+9jpNdl{AK&CONB~!`)3C`$m2M zKZO&=N*(PBIB?{uA}J9{O@Y6@`K#DdUDY!;<#OS#fBx|P%%@U+r{+Ex=;1z2ESP>W#>a>$E*PB~#7^30A}3JXwR&LbD0$h?GHf)aB< zmBR{Dn2V|!F2gc&N!7wS)S1i34QMb|kekqCt|G6%3iGmRg{!d2Tti-iHRd|94QrqDU>@cq)@4_zg8uA|OF|Q-k!8_(Q@-DO 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a/.venv/lib/python3.6/site-packages/flask/app.py b/.venv/lib/python3.6/site-packages/flask/app.py new file mode 100644 index 0000000..23b99e2 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/flask/app.py @@ -0,0 +1,2091 @@ +import functools +import inspect +import logging +import os +import sys +import typing as t +import weakref +from datetime import timedelta +from itertools import chain +from threading import Lock +from types import TracebackType + +from werkzeug.datastructures import Headers +from werkzeug.datastructures import ImmutableDict +from werkzeug.exceptions import BadRequest +from werkzeug.exceptions import BadRequestKeyError +from werkzeug.exceptions import HTTPException +from werkzeug.exceptions import InternalServerError +from werkzeug.local import ContextVar +from werkzeug.routing import BuildError +from werkzeug.routing import Map +from werkzeug.routing import MapAdapter +from werkzeug.routing import RequestRedirect +from werkzeug.routing import RoutingException +from werkzeug.routing import Rule +from werkzeug.wrappers import Response as BaseResponse + +from . import cli +from . import json +from .config import Config +from .config import ConfigAttribute +from .ctx import _AppCtxGlobals +from .ctx import AppContext +from .ctx import RequestContext +from .globals import _request_ctx_stack +from .globals import g +from .globals import request +from .globals import session +from .helpers import _split_blueprint_path +from .helpers import get_debug_flag +from .helpers import get_env +from .helpers import get_flashed_messages +from .helpers import get_load_dotenv +from .helpers import locked_cached_property +from .helpers import url_for +from .json import jsonify +from .logging import create_logger +from .scaffold import _endpoint_from_view_func +from .scaffold import _sentinel +from .scaffold import find_package +from .scaffold import Scaffold +from .scaffold import setupmethod +from .sessions import SecureCookieSessionInterface +from .signals import appcontext_tearing_down +from .signals import got_request_exception +from .signals import request_finished +from .signals import request_started +from .signals import request_tearing_down +from .templating import DispatchingJinjaLoader +from .templating import Environment +from .typing import BeforeFirstRequestCallable +from .typing import ResponseReturnValue +from .typing import TeardownCallable +from .typing import TemplateFilterCallable +from .typing import TemplateGlobalCallable +from .typing import TemplateTestCallable +from .wrappers import Request +from .wrappers import Response + +if t.TYPE_CHECKING: + import typing_extensions as te + from .blueprints import Blueprint + from .testing import FlaskClient + from .testing import FlaskCliRunner + from .typing import ErrorHandlerCallable + +if sys.version_info >= (3, 8): + iscoroutinefunction = inspect.iscoroutinefunction +else: + + def iscoroutinefunction(func: t.Any) -> bool: + while inspect.ismethod(func): + func = func.__func__ + + while isinstance(func, functools.partial): + func = func.func + + return inspect.iscoroutinefunction(func) + + +def _make_timedelta(value: t.Optional[timedelta]) -> t.Optional[timedelta]: + if value is None or isinstance(value, timedelta): + return value + + return timedelta(seconds=value) + + +class Flask(Scaffold): + """The flask object implements a WSGI application and acts as the central + object. It is passed the name of the module or package of the + application. Once it is created it will act as a central registry for + the view functions, the URL rules, template configuration and much more. + + The name of the package is used to resolve resources from inside the + package or the folder the module is contained in depending on if the + package parameter resolves to an actual python package (a folder with + an :file:`__init__.py` file inside) or a standard module (just a ``.py`` file). + + For more information about resource loading, see :func:`open_resource`. + + Usually you create a :class:`Flask` instance in your main module or + in the :file:`__init__.py` file of your package like this:: + + from flask import Flask + app = Flask(__name__) + + .. admonition:: About the First Parameter + + The idea of the first parameter is to give Flask an idea of what + belongs to your application. This name is used to find resources + on the filesystem, can be used by extensions to improve debugging + information and a lot more. + + So it's important what you provide there. If you are using a single + module, `__name__` is always the correct value. If you however are + using a package, it's usually recommended to hardcode the name of + your package there. + + For example if your application is defined in :file:`yourapplication/app.py` + you should create it with one of the two versions below:: + + app = Flask('yourapplication') + app = Flask(__name__.split('.')[0]) + + Why is that? The application will work even with `__name__`, thanks + to how resources are looked up. However it will make debugging more + painful. Certain extensions can make assumptions based on the + import name of your application. For example the Flask-SQLAlchemy + extension will look for the code in your application that triggered + an SQL query in debug mode. If the import name is not properly set + up, that debugging information is lost. (For example it would only + pick up SQL queries in `yourapplication.app` and not + `yourapplication.views.frontend`) + + .. versionadded:: 0.7 + The `static_url_path`, `static_folder`, and `template_folder` + parameters were added. + + .. versionadded:: 0.8 + The `instance_path` and `instance_relative_config` parameters were + added. + + .. versionadded:: 0.11 + The `root_path` parameter was added. + + .. versionadded:: 1.0 + The ``host_matching`` and ``static_host`` parameters were added. + + .. versionadded:: 1.0 + The ``subdomain_matching`` parameter was added. Subdomain + matching needs to be enabled manually now. Setting + :data:`SERVER_NAME` does not implicitly enable it. + + :param import_name: the name of the application package + :param static_url_path: can be used to specify a different path for the + static files on the web. Defaults to the name + of the `static_folder` folder. + :param static_folder: The folder with static files that is served at + ``static_url_path``. Relative to the application ``root_path`` + or an absolute path. Defaults to ``'static'``. + :param static_host: the host to use when adding the static route. + Defaults to None. Required when using ``host_matching=True`` + with a ``static_folder`` configured. + :param host_matching: set ``url_map.host_matching`` attribute. + Defaults to False. + :param subdomain_matching: consider the subdomain relative to + :data:`SERVER_NAME` when matching routes. Defaults to False. + :param template_folder: the folder that contains the templates that should + be used by the application. Defaults to + ``'templates'`` folder in the root path of the + application. + :param instance_path: An alternative instance path for the application. + By default the folder ``'instance'`` next to the + package or module is assumed to be the instance + path. + :param instance_relative_config: if set to ``True`` relative filenames + for loading the config are assumed to + be relative to the instance path instead + of the application root. + :param root_path: The path to the root of the application files. + This should only be set manually when it can't be detected + automatically, such as for namespace packages. + """ + + #: The class that is used for request objects. See :class:`~flask.Request` + #: for more information. + request_class = Request + + #: The class that is used for response objects. See + #: :class:`~flask.Response` for more information. + response_class = Response + + #: The class that is used for the Jinja environment. + #: + #: .. versionadded:: 0.11 + jinja_environment = Environment + + #: The class that is used for the :data:`~flask.g` instance. + #: + #: Example use cases for a custom class: + #: + #: 1. Store arbitrary attributes on flask.g. + #: 2. Add a property for lazy per-request database connectors. + #: 3. Return None instead of AttributeError on unexpected attributes. + #: 4. Raise exception if an unexpected attr is set, a "controlled" flask.g. + #: + #: In Flask 0.9 this property was called `request_globals_class` but it + #: was changed in 0.10 to :attr:`app_ctx_globals_class` because the + #: flask.g object is now application context scoped. + #: + #: .. versionadded:: 0.10 + app_ctx_globals_class = _AppCtxGlobals + + #: The class that is used for the ``config`` attribute of this app. + #: Defaults to :class:`~flask.Config`. + #: + #: Example use cases for a custom class: + #: + #: 1. Default values for certain config options. + #: 2. Access to config values through attributes in addition to keys. + #: + #: .. versionadded:: 0.11 + config_class = Config + + #: The testing flag. Set this to ``True`` to enable the test mode of + #: Flask extensions (and in the future probably also Flask itself). + #: For example this might activate test helpers that have an + #: additional runtime cost which should not be enabled by default. + #: + #: If this is enabled and PROPAGATE_EXCEPTIONS is not changed from the + #: default it's implicitly enabled. + #: + #: This attribute can also be configured from the config with the + #: ``TESTING`` configuration key. Defaults to ``False``. + testing = ConfigAttribute("TESTING") + + #: If a secret key is set, cryptographic components can use this to + #: sign cookies and other things. Set this to a complex random value + #: when you want to use the secure cookie for instance. + #: + #: This attribute can also be configured from the config with the + #: :data:`SECRET_KEY` configuration key. Defaults to ``None``. + secret_key = ConfigAttribute("SECRET_KEY") + + #: The secure cookie uses this for the name of the session cookie. + #: + #: This attribute can also be configured from the config with the + #: ``SESSION_COOKIE_NAME`` configuration key. Defaults to ``'session'`` + session_cookie_name = ConfigAttribute("SESSION_COOKIE_NAME") + + #: A :class:`~datetime.timedelta` which is used to set the expiration + #: date of a permanent session. The default is 31 days which makes a + #: permanent session survive for roughly one month. + #: + #: This attribute can also be configured from the config with the + #: ``PERMANENT_SESSION_LIFETIME`` configuration key. Defaults to + #: ``timedelta(days=31)`` + permanent_session_lifetime = ConfigAttribute( + "PERMANENT_SESSION_LIFETIME", get_converter=_make_timedelta + ) + + #: A :class:`~datetime.timedelta` or number of seconds which is used + #: as the default ``max_age`` for :func:`send_file`. The default is + #: ``None``, which tells the browser to use conditional requests + #: instead of a timed cache. + #: + #: Configured with the :data:`SEND_FILE_MAX_AGE_DEFAULT` + #: configuration key. + #: + #: .. versionchanged:: 2.0 + #: Defaults to ``None`` instead of 12 hours. + send_file_max_age_default = ConfigAttribute( + "SEND_FILE_MAX_AGE_DEFAULT", get_converter=_make_timedelta + ) + + #: Enable this if you want to use the X-Sendfile feature. Keep in + #: mind that the server has to support this. This only affects files + #: sent with the :func:`send_file` method. + #: + #: .. versionadded:: 0.2 + #: + #: This attribute can also be configured from the config with the + #: ``USE_X_SENDFILE`` configuration key. Defaults to ``False``. + use_x_sendfile = ConfigAttribute("USE_X_SENDFILE") + + #: The JSON encoder class to use. Defaults to :class:`~flask.json.JSONEncoder`. + #: + #: .. versionadded:: 0.10 + json_encoder = json.JSONEncoder + + #: The JSON decoder class to use. Defaults to :class:`~flask.json.JSONDecoder`. + #: + #: .. versionadded:: 0.10 + json_decoder = json.JSONDecoder + + #: Options that are passed to the Jinja environment in + #: :meth:`create_jinja_environment`. Changing these options after + #: the environment is created (accessing :attr:`jinja_env`) will + #: have no effect. + #: + #: .. versionchanged:: 1.1.0 + #: This is a ``dict`` instead of an ``ImmutableDict`` to allow + #: easier configuration. + #: + jinja_options: dict = {} + + #: Default configuration parameters. + default_config = ImmutableDict( + { + "ENV": None, + "DEBUG": None, + "TESTING": False, + "PROPAGATE_EXCEPTIONS": None, + "PRESERVE_CONTEXT_ON_EXCEPTION": None, + "SECRET_KEY": None, + "PERMANENT_SESSION_LIFETIME": timedelta(days=31), + "USE_X_SENDFILE": False, + "SERVER_NAME": None, + "APPLICATION_ROOT": "/", + "SESSION_COOKIE_NAME": "session", + "SESSION_COOKIE_DOMAIN": None, + "SESSION_COOKIE_PATH": None, + "SESSION_COOKIE_HTTPONLY": True, + "SESSION_COOKIE_SECURE": False, + "SESSION_COOKIE_SAMESITE": None, + "SESSION_REFRESH_EACH_REQUEST": True, + "MAX_CONTENT_LENGTH": None, + "SEND_FILE_MAX_AGE_DEFAULT": None, + "TRAP_BAD_REQUEST_ERRORS": None, + "TRAP_HTTP_EXCEPTIONS": False, + "EXPLAIN_TEMPLATE_LOADING": False, + "PREFERRED_URL_SCHEME": "http", + "JSON_AS_ASCII": True, + "JSON_SORT_KEYS": True, + "JSONIFY_PRETTYPRINT_REGULAR": False, + "JSONIFY_MIMETYPE": "application/json", + "TEMPLATES_AUTO_RELOAD": None, + "MAX_COOKIE_SIZE": 4093, + } + ) + + #: The rule object to use for URL rules created. This is used by + #: :meth:`add_url_rule`. Defaults to :class:`werkzeug.routing.Rule`. + #: + #: .. versionadded:: 0.7 + url_rule_class = Rule + + #: The map object to use for storing the URL rules and routing + #: configuration parameters. Defaults to :class:`werkzeug.routing.Map`. + #: + #: .. versionadded:: 1.1.0 + url_map_class = Map + + #: The :meth:`test_client` method creates an instance of this test + #: client class. Defaults to :class:`~flask.testing.FlaskClient`. + #: + #: .. versionadded:: 0.7 + test_client_class: t.Optional[t.Type["FlaskClient"]] = None + + #: The :class:`~click.testing.CliRunner` subclass, by default + #: :class:`~flask.testing.FlaskCliRunner` that is used by + #: :meth:`test_cli_runner`. Its ``__init__`` method should take a + #: Flask app object as the first argument. + #: + #: .. versionadded:: 1.0 + test_cli_runner_class: t.Optional[t.Type["FlaskCliRunner"]] = None + + #: the session interface to use. By default an instance of + #: :class:`~flask.sessions.SecureCookieSessionInterface` is used here. + #: + #: .. versionadded:: 0.8 + session_interface = SecureCookieSessionInterface() + + def __init__( + self, + import_name: str, + static_url_path: t.Optional[str] = None, + static_folder: t.Optional[t.Union[str, os.PathLike]] = "static", + static_host: t.Optional[str] = None, + host_matching: bool = False, + subdomain_matching: bool = False, + template_folder: t.Optional[str] = "templates", + instance_path: t.Optional[str] = None, + instance_relative_config: bool = False, + root_path: t.Optional[str] = None, + ): + super().__init__( + import_name=import_name, + static_folder=static_folder, + static_url_path=static_url_path, + template_folder=template_folder, + root_path=root_path, + ) + + if instance_path is None: + instance_path = self.auto_find_instance_path() + elif not os.path.isabs(instance_path): + raise ValueError( + "If an instance path is provided it must be absolute." + " A relative path was given instead." + ) + + #: Holds the path to the instance folder. + #: + #: .. versionadded:: 0.8 + self.instance_path = instance_path + + #: The configuration dictionary as :class:`Config`. This behaves + #: exactly like a regular dictionary but supports additional methods + #: to load a config from files. + self.config = self.make_config(instance_relative_config) + + #: A list of functions that are called when :meth:`url_for` raises a + #: :exc:`~werkzeug.routing.BuildError`. Each function registered here + #: is called with `error`, `endpoint` and `values`. If a function + #: returns ``None`` or raises a :exc:`BuildError` the next function is + #: tried. + #: + #: .. versionadded:: 0.9 + self.url_build_error_handlers: t.List[ + t.Callable[[Exception, str, dict], str] + ] = [] + + #: A list of functions that will be called at the beginning of the + #: first request to this instance. To register a function, use the + #: :meth:`before_first_request` decorator. + #: + #: .. versionadded:: 0.8 + self.before_first_request_funcs: t.List[BeforeFirstRequestCallable] = [] + + #: A list of functions that are called when the application context + #: is destroyed. Since the application context is also torn down + #: if the request ends this is the place to store code that disconnects + #: from databases. + #: + #: .. versionadded:: 0.9 + self.teardown_appcontext_funcs: t.List[TeardownCallable] = [] + + #: A list of shell context processor functions that should be run + #: when a shell context is created. + #: + #: .. versionadded:: 0.11 + self.shell_context_processors: t.List[t.Callable[[], t.Dict[str, t.Any]]] = [] + + #: Maps registered blueprint names to blueprint objects. The + #: dict retains the order the blueprints were registered in. + #: Blueprints can be registered multiple times, this dict does + #: not track how often they were attached. + #: + #: .. versionadded:: 0.7 + self.blueprints: t.Dict[str, "Blueprint"] = {} + + #: a place where extensions can store application specific state. For + #: example this is where an extension could store database engines and + #: similar things. + #: + #: The key must match the name of the extension module. For example in + #: case of a "Flask-Foo" extension in `flask_foo`, the key would be + #: ``'foo'``. + #: + #: .. versionadded:: 0.7 + self.extensions: dict = {} + + #: The :class:`~werkzeug.routing.Map` for this instance. You can use + #: this to change the routing converters after the class was created + #: but before any routes are connected. Example:: + #: + #: from werkzeug.routing import BaseConverter + #: + #: class ListConverter(BaseConverter): + #: def to_python(self, value): + #: return value.split(',') + #: def to_url(self, values): + #: return ','.join(super(ListConverter, self).to_url(value) + #: for value in values) + #: + #: app = Flask(__name__) + #: app.url_map.converters['list'] = ListConverter + self.url_map = self.url_map_class() + + self.url_map.host_matching = host_matching + self.subdomain_matching = subdomain_matching + + # tracks internally if the application already handled at least one + # request. + self._got_first_request = False + self._before_request_lock = Lock() + + # Add a static route using the provided static_url_path, static_host, + # and static_folder if there is a configured static_folder. + # Note we do this without checking if static_folder exists. + # For one, it might be created while the server is running (e.g. during + # development). Also, Google App Engine stores static files somewhere + if self.has_static_folder: + assert ( + bool(static_host) == host_matching + ), "Invalid static_host/host_matching combination" + # Use a weakref to avoid creating a reference cycle between the app + # and the view function (see #3761). + self_ref = weakref.ref(self) + self.add_url_rule( + f"{self.static_url_path}/", + endpoint="static", + host=static_host, + view_func=lambda **kw: self_ref().send_static_file(**kw), # type: ignore # noqa: B950 + ) + + # Set the name of the Click group in case someone wants to add + # the app's commands to another CLI tool. + self.cli.name = self.name + + def _is_setup_finished(self) -> bool: + return self.debug and self._got_first_request + + @locked_cached_property + def name(self) -> str: # type: ignore + """The name of the application. This is usually the import name + with the difference that it's guessed from the run file if the + import name is main. This name is used as a display name when + Flask needs the name of the application. It can be set and overridden + to change the value. + + .. versionadded:: 0.8 + """ + if self.import_name == "__main__": + fn = getattr(sys.modules["__main__"], "__file__", None) + if fn is None: + return "__main__" + return os.path.splitext(os.path.basename(fn))[0] + return self.import_name + + @property + def propagate_exceptions(self) -> bool: + """Returns the value of the ``PROPAGATE_EXCEPTIONS`` configuration + value in case it's set, otherwise a sensible default is returned. + + .. versionadded:: 0.7 + """ + rv = self.config["PROPAGATE_EXCEPTIONS"] + if rv is not None: + return rv + return self.testing or self.debug + + @property + def preserve_context_on_exception(self) -> bool: + """Returns the value of the ``PRESERVE_CONTEXT_ON_EXCEPTION`` + configuration value in case it's set, otherwise a sensible default + is returned. + + .. versionadded:: 0.7 + """ + rv = self.config["PRESERVE_CONTEXT_ON_EXCEPTION"] + if rv is not None: + return rv + return self.debug + + @locked_cached_property + def logger(self) -> logging.Logger: + """A standard Python :class:`~logging.Logger` for the app, with + the same name as :attr:`name`. + + In debug mode, the logger's :attr:`~logging.Logger.level` will + be set to :data:`~logging.DEBUG`. + + If there are no handlers configured, a default handler will be + added. See :doc:`/logging` for more information. + + .. versionchanged:: 1.1.0 + The logger takes the same name as :attr:`name` rather than + hard-coding ``"flask.app"``. + + .. versionchanged:: 1.0.0 + Behavior was simplified. The logger is always named + ``"flask.app"``. The level is only set during configuration, + it doesn't check ``app.debug`` each time. Only one format is + used, not different ones depending on ``app.debug``. No + handlers are removed, and a handler is only added if no + handlers are already configured. + + .. versionadded:: 0.3 + """ + return create_logger(self) + + @locked_cached_property + def jinja_env(self) -> Environment: + """The Jinja environment used to load templates. + + The environment is created the first time this property is + accessed. Changing :attr:`jinja_options` after that will have no + effect. + """ + return self.create_jinja_environment() + + @property + def got_first_request(self) -> bool: + """This attribute is set to ``True`` if the application started + handling the first request. + + .. versionadded:: 0.8 + """ + return self._got_first_request + + def make_config(self, instance_relative: bool = False) -> Config: + """Used to create the config attribute by the Flask constructor. + The `instance_relative` parameter is passed in from the constructor + of Flask (there named `instance_relative_config`) and indicates if + the config should be relative to the instance path or the root path + of the application. + + .. versionadded:: 0.8 + """ + root_path = self.root_path + if instance_relative: + root_path = self.instance_path + defaults = dict(self.default_config) + defaults["ENV"] = get_env() + defaults["DEBUG"] = get_debug_flag() + return self.config_class(root_path, defaults) + + def auto_find_instance_path(self) -> str: + """Tries to locate the instance path if it was not provided to the + constructor of the application class. It will basically calculate + the path to a folder named ``instance`` next to your main file or + the package. + + .. versionadded:: 0.8 + """ + prefix, package_path = find_package(self.import_name) + if prefix is None: + return os.path.join(package_path, "instance") + return os.path.join(prefix, "var", f"{self.name}-instance") + + def open_instance_resource(self, resource: str, mode: str = "rb") -> t.IO[t.AnyStr]: + """Opens a resource from the application's instance folder + (:attr:`instance_path`). Otherwise works like + :meth:`open_resource`. Instance resources can also be opened for + writing. + + :param resource: the name of the resource. To access resources within + subfolders use forward slashes as separator. + :param mode: resource file opening mode, default is 'rb'. + """ + return open(os.path.join(self.instance_path, resource), mode) + + @property + def templates_auto_reload(self) -> bool: + """Reload templates when they are changed. Used by + :meth:`create_jinja_environment`. + + This attribute can be configured with :data:`TEMPLATES_AUTO_RELOAD`. If + not set, it will be enabled in debug mode. + + .. versionadded:: 1.0 + This property was added but the underlying config and behavior + already existed. + """ + rv = self.config["TEMPLATES_AUTO_RELOAD"] + return rv if rv is not None else self.debug + + @templates_auto_reload.setter + def templates_auto_reload(self, value: bool) -> None: + self.config["TEMPLATES_AUTO_RELOAD"] = value + + def create_jinja_environment(self) -> Environment: + """Create the Jinja environment based on :attr:`jinja_options` + and the various Jinja-related methods of the app. Changing + :attr:`jinja_options` after this will have no effect. Also adds + Flask-related globals and filters to the environment. + + .. versionchanged:: 0.11 + ``Environment.auto_reload`` set in accordance with + ``TEMPLATES_AUTO_RELOAD`` configuration option. + + .. versionadded:: 0.5 + """ + options = dict(self.jinja_options) + + if "autoescape" not in options: + options["autoescape"] = self.select_jinja_autoescape + + if "auto_reload" not in options: + options["auto_reload"] = self.templates_auto_reload + + rv = self.jinja_environment(self, **options) + rv.globals.update( + url_for=url_for, + get_flashed_messages=get_flashed_messages, + config=self.config, + # request, session and g are normally added with the + # context processor for efficiency reasons but for imported + # templates we also want the proxies in there. + request=request, + session=session, + g=g, + ) + rv.policies["json.dumps_function"] = json.dumps + return rv + + def create_global_jinja_loader(self) -> DispatchingJinjaLoader: + """Creates the loader for the Jinja2 environment. Can be used to + override just the loader and keeping the rest unchanged. It's + discouraged to override this function. Instead one should override + the :meth:`jinja_loader` function instead. + + The global loader dispatches between the loaders of the application + and the individual blueprints. + + .. versionadded:: 0.7 + """ + return DispatchingJinjaLoader(self) + + def select_jinja_autoescape(self, filename: str) -> bool: + """Returns ``True`` if autoescaping should be active for the given + template name. If no template name is given, returns `True`. + + .. versionadded:: 0.5 + """ + if filename is None: + return True + return filename.endswith((".html", ".htm", ".xml", ".xhtml")) + + def update_template_context(self, context: dict) -> None: + """Update the template context with some commonly used variables. + This injects request, session, config and g into the template + context as well as everything template context processors want + to inject. Note that the as of Flask 0.6, the original values + in the context will not be overridden if a context processor + decides to return a value with the same key. + + :param context: the context as a dictionary that is updated in place + to add extra variables. + """ + names: t.Iterable[t.Optional[str]] = (None,) + + # A template may be rendered outside a request context. + if request: + names = chain(names, reversed(request.blueprints)) + + # The values passed to render_template take precedence. Keep a + # copy to re-apply after all context functions. + orig_ctx = context.copy() + + for name in names: + if name in self.template_context_processors: + for func in self.template_context_processors[name]: + context.update(func()) + + context.update(orig_ctx) + + def make_shell_context(self) -> dict: + """Returns the shell context for an interactive shell for this + application. This runs all the registered shell context + processors. + + .. versionadded:: 0.11 + """ + rv = {"app": self, "g": g} + for processor in self.shell_context_processors: + rv.update(processor()) + return rv + + #: What environment the app is running in. Flask and extensions may + #: enable behaviors based on the environment, such as enabling debug + #: mode. This maps to the :data:`ENV` config key. This is set by the + #: :envvar:`FLASK_ENV` environment variable and may not behave as + #: expected if set in code. + #: + #: **Do not enable development when deploying in production.** + #: + #: Default: ``'production'`` + env = ConfigAttribute("ENV") + + @property + def debug(self) -> bool: + """Whether debug mode is enabled. When using ``flask run`` to start + the development server, an interactive debugger will be shown for + unhandled exceptions, and the server will be reloaded when code + changes. This maps to the :data:`DEBUG` config key. This is + enabled when :attr:`env` is ``'development'`` and is overridden + by the ``FLASK_DEBUG`` environment variable. It may not behave as + expected if set in code. + + **Do not enable debug mode when deploying in production.** + + Default: ``True`` if :attr:`env` is ``'development'``, or + ``False`` otherwise. + """ + return self.config["DEBUG"] + + @debug.setter + def debug(self, value: bool) -> None: + self.config["DEBUG"] = value + self.jinja_env.auto_reload = self.templates_auto_reload + + def run( + self, + host: t.Optional[str] = None, + port: t.Optional[int] = None, + debug: t.Optional[bool] = None, + load_dotenv: bool = True, + **options: t.Any, + ) -> None: + """Runs the application on a local development server. + + Do not use ``run()`` in a production setting. It is not intended to + meet security and performance requirements for a production server. + Instead, see :doc:`/deploying/index` for WSGI server recommendations. + + If the :attr:`debug` flag is set the server will automatically reload + for code changes and show a debugger in case an exception happened. + + If you want to run the application in debug mode, but disable the + code execution on the interactive debugger, you can pass + ``use_evalex=False`` as parameter. This will keep the debugger's + traceback screen active, but disable code execution. + + It is not recommended to use this function for development with + automatic reloading as this is badly supported. Instead you should + be using the :command:`flask` command line script's ``run`` support. + + .. admonition:: Keep in Mind + + Flask will suppress any server error with a generic error page + unless it is in debug mode. As such to enable just the + interactive debugger without the code reloading, you have to + invoke :meth:`run` with ``debug=True`` and ``use_reloader=False``. + Setting ``use_debugger`` to ``True`` without being in debug mode + won't catch any exceptions because there won't be any to + catch. + + :param host: the hostname to listen on. Set this to ``'0.0.0.0'`` to + have the server available externally as well. Defaults to + ``'127.0.0.1'`` or the host in the ``SERVER_NAME`` config variable + if present. + :param port: the port of the webserver. Defaults to ``5000`` or the + port defined in the ``SERVER_NAME`` config variable if present. + :param debug: if given, enable or disable debug mode. See + :attr:`debug`. + :param load_dotenv: Load the nearest :file:`.env` and :file:`.flaskenv` + files to set environment variables. Will also change the working + directory to the directory containing the first file found. + :param options: the options to be forwarded to the underlying Werkzeug + server. See :func:`werkzeug.serving.run_simple` for more + information. + + .. versionchanged:: 1.0 + If installed, python-dotenv will be used to load environment + variables from :file:`.env` and :file:`.flaskenv` files. + + If set, the :envvar:`FLASK_ENV` and :envvar:`FLASK_DEBUG` + environment variables will override :attr:`env` and + :attr:`debug`. + + Threaded mode is enabled by default. + + .. versionchanged:: 0.10 + The default port is now picked from the ``SERVER_NAME`` + variable. + """ + # Change this into a no-op if the server is invoked from the + # command line. Have a look at cli.py for more information. + if os.environ.get("FLASK_RUN_FROM_CLI") == "true": + from .debughelpers import explain_ignored_app_run + + explain_ignored_app_run() + return + + if get_load_dotenv(load_dotenv): + cli.load_dotenv() + + # if set, let env vars override previous values + if "FLASK_ENV" in os.environ: + self.env = get_env() + self.debug = get_debug_flag() + elif "FLASK_DEBUG" in os.environ: + self.debug = get_debug_flag() + + # debug passed to method overrides all other sources + if debug is not None: + self.debug = bool(debug) + + server_name = self.config.get("SERVER_NAME") + sn_host = sn_port = None + + if server_name: + sn_host, _, sn_port = server_name.partition(":") + + if not host: + if sn_host: + host = sn_host + else: + host = "127.0.0.1" + + if port or port == 0: + port = int(port) + elif sn_port: + port = int(sn_port) + else: + port = 5000 + + options.setdefault("use_reloader", self.debug) + options.setdefault("use_debugger", self.debug) + options.setdefault("threaded", True) + + cli.show_server_banner(self.env, self.debug, self.name, False) + + from werkzeug.serving import run_simple + + try: + run_simple(t.cast(str, host), port, self, **options) + finally: + # reset the first request information if the development server + # reset normally. This makes it possible to restart the server + # without reloader and that stuff from an interactive shell. + self._got_first_request = False + + def test_client(self, use_cookies: bool = True, **kwargs: t.Any) -> "FlaskClient": + """Creates a test client for this application. For information + about unit testing head over to :doc:`/testing`. + + Note that if you are testing for assertions or exceptions in your + application code, you must set ``app.testing = True`` in order for the + exceptions to propagate to the test client. Otherwise, the exception + will be handled by the application (not visible to the test client) and + the only indication of an AssertionError or other exception will be a + 500 status code response to the test client. See the :attr:`testing` + attribute. For example:: + + app.testing = True + client = app.test_client() + + The test client can be used in a ``with`` block to defer the closing down + of the context until the end of the ``with`` block. This is useful if + you want to access the context locals for testing:: + + with app.test_client() as c: + rv = c.get('/?vodka=42') + assert request.args['vodka'] == '42' + + Additionally, you may pass optional keyword arguments that will then + be passed to the application's :attr:`test_client_class` constructor. + For example:: + + from flask.testing import FlaskClient + + class CustomClient(FlaskClient): + def __init__(self, *args, **kwargs): + self._authentication = kwargs.pop("authentication") + super(CustomClient,self).__init__( *args, **kwargs) + + app.test_client_class = CustomClient + client = app.test_client(authentication='Basic ....') + + See :class:`~flask.testing.FlaskClient` for more information. + + .. versionchanged:: 0.4 + added support for ``with`` block usage for the client. + + .. versionadded:: 0.7 + The `use_cookies` parameter was added as well as the ability + to override the client to be used by setting the + :attr:`test_client_class` attribute. + + .. versionchanged:: 0.11 + Added `**kwargs` to support passing additional keyword arguments to + the constructor of :attr:`test_client_class`. + """ + cls = self.test_client_class + if cls is None: + from .testing import FlaskClient as cls # type: ignore + return cls( # type: ignore + self, self.response_class, use_cookies=use_cookies, **kwargs + ) + + def test_cli_runner(self, **kwargs: t.Any) -> "FlaskCliRunner": + """Create a CLI runner for testing CLI commands. + See :ref:`testing-cli`. + + Returns an instance of :attr:`test_cli_runner_class`, by default + :class:`~flask.testing.FlaskCliRunner`. The Flask app object is + passed as the first argument. + + .. versionadded:: 1.0 + """ + cls = self.test_cli_runner_class + + if cls is None: + from .testing import FlaskCliRunner as cls # type: ignore + + return cls(self, **kwargs) # type: ignore + + @setupmethod + def register_blueprint(self, blueprint: "Blueprint", **options: t.Any) -> None: + """Register a :class:`~flask.Blueprint` on the application. Keyword + arguments passed to this method will override the defaults set on the + blueprint. + + Calls the blueprint's :meth:`~flask.Blueprint.register` method after + recording the blueprint in the application's :attr:`blueprints`. + + :param blueprint: The blueprint to register. + :param url_prefix: Blueprint routes will be prefixed with this. + :param subdomain: Blueprint routes will match on this subdomain. + :param url_defaults: Blueprint routes will use these default values for + view arguments. + :param options: Additional keyword arguments are passed to + :class:`~flask.blueprints.BlueprintSetupState`. They can be + accessed in :meth:`~flask.Blueprint.record` callbacks. + + .. versionchanged:: 2.0.1 + The ``name`` option can be used to change the (pre-dotted) + name the blueprint is registered with. This allows the same + blueprint to be registered multiple times with unique names + for ``url_for``. + + .. versionadded:: 0.7 + """ + blueprint.register(self, options) + + def iter_blueprints(self) -> t.ValuesView["Blueprint"]: + """Iterates over all blueprints by the order they were registered. + + .. versionadded:: 0.11 + """ + return self.blueprints.values() + + @setupmethod + def add_url_rule( + self, + rule: str, + endpoint: t.Optional[str] = None, + view_func: t.Optional[t.Callable] = None, + provide_automatic_options: t.Optional[bool] = None, + **options: t.Any, + ) -> None: + if endpoint is None: + endpoint = _endpoint_from_view_func(view_func) # type: ignore + options["endpoint"] = endpoint + methods = options.pop("methods", None) + + # if the methods are not given and the view_func object knows its + # methods we can use that instead. If neither exists, we go with + # a tuple of only ``GET`` as default. + if methods is None: + methods = getattr(view_func, "methods", None) or ("GET",) + if isinstance(methods, str): + raise TypeError( + "Allowed methods must be a list of strings, for" + ' example: @app.route(..., methods=["POST"])' + ) + methods = {item.upper() for item in methods} + + # Methods that should always be added + required_methods = set(getattr(view_func, "required_methods", ())) + + # starting with Flask 0.8 the view_func object can disable and + # force-enable the automatic options handling. + if provide_automatic_options is None: + provide_automatic_options = getattr( + view_func, "provide_automatic_options", None + ) + + if provide_automatic_options is None: + if "OPTIONS" not in methods: + provide_automatic_options = True + required_methods.add("OPTIONS") + else: + provide_automatic_options = False + + # Add the required methods now. + methods |= required_methods + + rule = self.url_rule_class(rule, methods=methods, **options) + rule.provide_automatic_options = provide_automatic_options # type: ignore + + self.url_map.add(rule) + if view_func is not None: + old_func = self.view_functions.get(endpoint) + if old_func is not None and old_func != view_func: + raise AssertionError( + "View function mapping is overwriting an existing" + f" endpoint function: {endpoint}" + ) + self.view_functions[endpoint] = view_func + + @setupmethod + def template_filter( + self, name: t.Optional[str] = None + ) -> t.Callable[[TemplateFilterCallable], TemplateFilterCallable]: + """A decorator that is used to register custom template filter. + You can specify a name for the filter, otherwise the function + name will be used. Example:: + + @app.template_filter() + def reverse(s): + return s[::-1] + + :param name: the optional name of the filter, otherwise the + function name will be used. + """ + + def decorator(f: TemplateFilterCallable) -> TemplateFilterCallable: + self.add_template_filter(f, name=name) + return f + + return decorator + + @setupmethod + def add_template_filter( + self, f: TemplateFilterCallable, name: t.Optional[str] = None + ) -> None: + """Register a custom template filter. Works exactly like the + :meth:`template_filter` decorator. + + :param name: the optional name of the filter, otherwise the + function name will be used. + """ + self.jinja_env.filters[name or f.__name__] = f + + @setupmethod + def template_test( + self, name: t.Optional[str] = None + ) -> t.Callable[[TemplateTestCallable], TemplateTestCallable]: + """A decorator that is used to register custom template test. + You can specify a name for the test, otherwise the function + name will be used. Example:: + + @app.template_test() + def is_prime(n): + if n == 2: + return True + for i in range(2, int(math.ceil(math.sqrt(n))) + 1): + if n % i == 0: + return False + return True + + .. versionadded:: 0.10 + + :param name: the optional name of the test, otherwise the + function name will be used. + """ + + def decorator(f: TemplateTestCallable) -> TemplateTestCallable: + self.add_template_test(f, name=name) + return f + + return decorator + + @setupmethod + def add_template_test( + self, f: TemplateTestCallable, name: t.Optional[str] = None + ) -> None: + """Register a custom template test. Works exactly like the + :meth:`template_test` decorator. + + .. versionadded:: 0.10 + + :param name: the optional name of the test, otherwise the + function name will be used. + """ + self.jinja_env.tests[name or f.__name__] = f + + @setupmethod + def template_global( + self, name: t.Optional[str] = None + ) -> t.Callable[[TemplateGlobalCallable], TemplateGlobalCallable]: + """A decorator that is used to register a custom template global function. + You can specify a name for the global function, otherwise the function + name will be used. Example:: + + @app.template_global() + def double(n): + return 2 * n + + .. versionadded:: 0.10 + + :param name: the optional name of the global function, otherwise the + function name will be used. + """ + + def decorator(f: TemplateGlobalCallable) -> TemplateGlobalCallable: + self.add_template_global(f, name=name) + return f + + return decorator + + @setupmethod + def add_template_global( + self, f: TemplateGlobalCallable, name: t.Optional[str] = None + ) -> None: + """Register a custom template global function. Works exactly like the + :meth:`template_global` decorator. + + .. versionadded:: 0.10 + + :param name: the optional name of the global function, otherwise the + function name will be used. + """ + self.jinja_env.globals[name or f.__name__] = f + + @setupmethod + def before_first_request( + self, f: BeforeFirstRequestCallable + ) -> BeforeFirstRequestCallable: + """Registers a function to be run before the first request to this + instance of the application. + + The function will be called without any arguments and its return + value is ignored. + + .. versionadded:: 0.8 + """ + self.before_first_request_funcs.append(f) + return f + + @setupmethod + def teardown_appcontext(self, f: TeardownCallable) -> TeardownCallable: + """Registers a function to be called when the application context + ends. These functions are typically also called when the request + context is popped. + + Example:: + + ctx = app.app_context() + ctx.push() + ... + ctx.pop() + + When ``ctx.pop()`` is executed in the above example, the teardown + functions are called just before the app context moves from the + stack of active contexts. This becomes relevant if you are using + such constructs in tests. + + Since a request context typically also manages an application + context it would also be called when you pop a request context. + + When a teardown function was called because of an unhandled exception + it will be passed an error object. If an :meth:`errorhandler` is + registered, it will handle the exception and the teardown will not + receive it. + + The return values of teardown functions are ignored. + + .. versionadded:: 0.9 + """ + self.teardown_appcontext_funcs.append(f) + return f + + @setupmethod + def shell_context_processor(self, f: t.Callable) -> t.Callable: + """Registers a shell context processor function. + + .. versionadded:: 0.11 + """ + self.shell_context_processors.append(f) + return f + + def _find_error_handler( + self, e: Exception + ) -> t.Optional["ErrorHandlerCallable[Exception]"]: + """Return a registered error handler for an exception in this order: + blueprint handler for a specific code, app handler for a specific code, + blueprint handler for an exception class, app handler for an exception + class, or ``None`` if a suitable handler is not found. + """ + exc_class, code = self._get_exc_class_and_code(type(e)) + names = (*request.blueprints, None) + + for c in (code, None) if code is not None else (None,): + for name in names: + handler_map = self.error_handler_spec[name][c] + + if not handler_map: + continue + + for cls in exc_class.__mro__: + handler = handler_map.get(cls) + + if handler is not None: + return handler + return None + + def handle_http_exception( + self, e: HTTPException + ) -> t.Union[HTTPException, ResponseReturnValue]: + """Handles an HTTP exception. By default this will invoke the + registered error handlers and fall back to returning the + exception as response. + + .. versionchanged:: 1.0.3 + ``RoutingException``, used internally for actions such as + slash redirects during routing, is not passed to error + handlers. + + .. versionchanged:: 1.0 + Exceptions are looked up by code *and* by MRO, so + ``HTTPException`` subclasses can be handled with a catch-all + handler for the base ``HTTPException``. + + .. versionadded:: 0.3 + """ + # Proxy exceptions don't have error codes. We want to always return + # those unchanged as errors + if e.code is None: + return e + + # RoutingExceptions are used internally to trigger routing + # actions, such as slash redirects raising RequestRedirect. They + # are not raised or handled in user code. + if isinstance(e, RoutingException): + return e + + handler = self._find_error_handler(e) + if handler is None: + return e + return self.ensure_sync(handler)(e) + + def trap_http_exception(self, e: Exception) -> bool: + """Checks if an HTTP exception should be trapped or not. By default + this will return ``False`` for all exceptions except for a bad request + key error if ``TRAP_BAD_REQUEST_ERRORS`` is set to ``True``. It + also returns ``True`` if ``TRAP_HTTP_EXCEPTIONS`` is set to ``True``. + + This is called for all HTTP exceptions raised by a view function. + If it returns ``True`` for any exception the error handler for this + exception is not called and it shows up as regular exception in the + traceback. This is helpful for debugging implicitly raised HTTP + exceptions. + + .. versionchanged:: 1.0 + Bad request errors are not trapped by default in debug mode. + + .. versionadded:: 0.8 + """ + if self.config["TRAP_HTTP_EXCEPTIONS"]: + return True + + trap_bad_request = self.config["TRAP_BAD_REQUEST_ERRORS"] + + # if unset, trap key errors in debug mode + if ( + trap_bad_request is None + and self.debug + and isinstance(e, BadRequestKeyError) + ): + return True + + if trap_bad_request: + return isinstance(e, BadRequest) + + return False + + def handle_user_exception( + self, e: Exception + ) -> t.Union[HTTPException, ResponseReturnValue]: + """This method is called whenever an exception occurs that + should be handled. A special case is :class:`~werkzeug + .exceptions.HTTPException` which is forwarded to the + :meth:`handle_http_exception` method. This function will either + return a response value or reraise the exception with the same + traceback. + + .. versionchanged:: 1.0 + Key errors raised from request data like ``form`` show the + bad key in debug mode rather than a generic bad request + message. + + .. versionadded:: 0.7 + """ + if isinstance(e, BadRequestKeyError) and ( + self.debug or self.config["TRAP_BAD_REQUEST_ERRORS"] + ): + e.show_exception = True + + if isinstance(e, HTTPException) and not self.trap_http_exception(e): + return self.handle_http_exception(e) + + handler = self._find_error_handler(e) + + if handler is None: + raise + + return self.ensure_sync(handler)(e) + + def handle_exception(self, e: Exception) -> Response: + """Handle an exception that did not have an error handler + associated with it, or that was raised from an error handler. + This always causes a 500 ``InternalServerError``. + + Always sends the :data:`got_request_exception` signal. + + If :attr:`propagate_exceptions` is ``True``, such as in debug + mode, the error will be re-raised so that the debugger can + display it. Otherwise, the original exception is logged, and + an :exc:`~werkzeug.exceptions.InternalServerError` is returned. + + If an error handler is registered for ``InternalServerError`` or + ``500``, it will be used. For consistency, the handler will + always receive the ``InternalServerError``. The original + unhandled exception is available as ``e.original_exception``. + + .. versionchanged:: 1.1.0 + Always passes the ``InternalServerError`` instance to the + handler, setting ``original_exception`` to the unhandled + error. + + .. versionchanged:: 1.1.0 + ``after_request`` functions and other finalization is done + even for the default 500 response when there is no handler. + + .. versionadded:: 0.3 + """ + exc_info = sys.exc_info() + got_request_exception.send(self, exception=e) + + if self.propagate_exceptions: + # Re-raise if called with an active exception, otherwise + # raise the passed in exception. + if exc_info[1] is e: + raise + + raise e + + self.log_exception(exc_info) + server_error: t.Union[InternalServerError, ResponseReturnValue] + server_error = InternalServerError(original_exception=e) + handler = self._find_error_handler(server_error) + + if handler is not None: + server_error = self.ensure_sync(handler)(server_error) + + return self.finalize_request(server_error, from_error_handler=True) + + def log_exception( + self, + exc_info: t.Union[ + t.Tuple[type, BaseException, TracebackType], t.Tuple[None, None, None] + ], + ) -> None: + """Logs an exception. This is called by :meth:`handle_exception` + if debugging is disabled and right before the handler is called. + The default implementation logs the exception as error on the + :attr:`logger`. + + .. versionadded:: 0.8 + """ + self.logger.error( + f"Exception on {request.path} [{request.method}]", exc_info=exc_info + ) + + def raise_routing_exception(self, request: Request) -> "te.NoReturn": + """Exceptions that are recording during routing are reraised with + this method. During debug we are not reraising redirect requests + for non ``GET``, ``HEAD``, or ``OPTIONS`` requests and we're raising + a different error instead to help debug situations. + + :internal: + """ + if ( + not self.debug + or not isinstance(request.routing_exception, RequestRedirect) + or request.method in ("GET", "HEAD", "OPTIONS") + ): + raise request.routing_exception # type: ignore + + from .debughelpers import FormDataRoutingRedirect + + raise FormDataRoutingRedirect(request) + + def dispatch_request(self) -> ResponseReturnValue: + """Does the request dispatching. Matches the URL and returns the + return value of the view or error handler. This does not have to + be a response object. In order to convert the return value to a + proper response object, call :func:`make_response`. + + .. versionchanged:: 0.7 + This no longer does the exception handling, this code was + moved to the new :meth:`full_dispatch_request`. + """ + req = _request_ctx_stack.top.request + if req.routing_exception is not None: + self.raise_routing_exception(req) + rule = req.url_rule + # if we provide automatic options for this URL and the + # request came with the OPTIONS method, reply automatically + if ( + getattr(rule, "provide_automatic_options", False) + and req.method == "OPTIONS" + ): + return self.make_default_options_response() + # otherwise dispatch to the handler for that endpoint + return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args) + + def full_dispatch_request(self) -> Response: + """Dispatches the request and on top of that performs request + pre and postprocessing as well as HTTP exception catching and + error handling. + + .. versionadded:: 0.7 + """ + self.try_trigger_before_first_request_functions() + try: + request_started.send(self) + rv = self.preprocess_request() + if rv is None: + rv = self.dispatch_request() + except Exception as e: + rv = self.handle_user_exception(e) + return self.finalize_request(rv) + + def finalize_request( + self, + rv: t.Union[ResponseReturnValue, HTTPException], + from_error_handler: bool = False, + ) -> Response: + """Given the return value from a view function this finalizes + the request by converting it into a response and invoking the + postprocessing functions. This is invoked for both normal + request dispatching as well as error handlers. + + Because this means that it might be called as a result of a + failure a special safe mode is available which can be enabled + with the `from_error_handler` flag. If enabled, failures in + response processing will be logged and otherwise ignored. + + :internal: + """ + response = self.make_response(rv) + try: + response = self.process_response(response) + request_finished.send(self, response=response) + except Exception: + if not from_error_handler: + raise + self.logger.exception( + "Request finalizing failed with an error while handling an error" + ) + return response + + def try_trigger_before_first_request_functions(self) -> None: + """Called before each request and will ensure that it triggers + the :attr:`before_first_request_funcs` and only exactly once per + application instance (which means process usually). + + :internal: + """ + if self._got_first_request: + return + with self._before_request_lock: + if self._got_first_request: + return + for func in self.before_first_request_funcs: + self.ensure_sync(func)() + self._got_first_request = True + + def make_default_options_response(self) -> Response: + """This method is called to create the default ``OPTIONS`` response. + This can be changed through subclassing to change the default + behavior of ``OPTIONS`` responses. + + .. versionadded:: 0.7 + """ + adapter = _request_ctx_stack.top.url_adapter + methods = adapter.allowed_methods() + rv = self.response_class() + rv.allow.update(methods) + return rv + + def should_ignore_error(self, error: t.Optional[BaseException]) -> bool: + """This is called to figure out if an error should be ignored + or not as far as the teardown system is concerned. If this + function returns ``True`` then the teardown handlers will not be + passed the error. + + .. versionadded:: 0.10 + """ + return False + + def ensure_sync(self, func: t.Callable) -> t.Callable: + """Ensure that the function is synchronous for WSGI workers. + Plain ``def`` functions are returned as-is. ``async def`` + functions are wrapped to run and wait for the response. + + Override this method to change how the app runs async views. + + .. versionadded:: 2.0 + """ + if iscoroutinefunction(func): + return self.async_to_sync(func) + + return func + + def async_to_sync( + self, func: t.Callable[..., t.Coroutine] + ) -> t.Callable[..., t.Any]: + """Return a sync function that will run the coroutine function. + + .. code-block:: python + + result = app.async_to_sync(func)(*args, **kwargs) + + Override this method to change how the app converts async code + to be synchronously callable. + + .. versionadded:: 2.0 + """ + try: + from asgiref.sync import async_to_sync as asgiref_async_to_sync + except ImportError: + raise RuntimeError( + "Install Flask with the 'async' extra in order to use async views." + ) from None + + # Check that Werkzeug isn't using its fallback ContextVar class. + if ContextVar.__module__ == "werkzeug.local": + raise RuntimeError( + "Async cannot be used with this combination of Python " + "and Greenlet versions." + ) + + return asgiref_async_to_sync(func) + + def make_response(self, rv: ResponseReturnValue) -> Response: + """Convert the return value from a view function to an instance of + :attr:`response_class`. + + :param rv: the return value from the view function. The view function + must return a response. Returning ``None``, or the view ending + without returning, is not allowed. The following types are allowed + for ``view_rv``: + + ``str`` + A response object is created with the string encoded to UTF-8 + as the body. + + ``bytes`` + A response object is created with the bytes as the body. + + ``dict`` + A dictionary that will be jsonify'd before being returned. + + ``tuple`` + Either ``(body, status, headers)``, ``(body, status)``, or + ``(body, headers)``, where ``body`` is any of the other types + allowed here, ``status`` is a string or an integer, and + ``headers`` is a dictionary or a list of ``(key, value)`` + tuples. If ``body`` is a :attr:`response_class` instance, + ``status`` overwrites the exiting value and ``headers`` are + extended. + + :attr:`response_class` + The object is returned unchanged. + + other :class:`~werkzeug.wrappers.Response` class + The object is coerced to :attr:`response_class`. + + :func:`callable` + The function is called as a WSGI application. The result is + used to create a response object. + + .. versionchanged:: 0.9 + Previously a tuple was interpreted as the arguments for the + response object. + """ + + status = headers = None + + # unpack tuple returns + if isinstance(rv, tuple): + len_rv = len(rv) + + # a 3-tuple is unpacked directly + if len_rv == 3: + rv, status, headers = rv + # decide if a 2-tuple has status or headers + elif len_rv == 2: + if isinstance(rv[1], (Headers, dict, tuple, list)): + rv, headers = rv + else: + rv, status = rv + # other sized tuples are not allowed + else: + raise TypeError( + "The view function did not return a valid response tuple." + " The tuple must have the form (body, status, headers)," + " (body, status), or (body, headers)." + ) + + # the body must not be None + if rv is None: + raise TypeError( + f"The view function for {request.endpoint!r} did not" + " return a valid response. The function either returned" + " None or ended without a return statement." + ) + + # make sure the body is an instance of the response class + if not isinstance(rv, self.response_class): + if isinstance(rv, (str, bytes, bytearray)): + # let the response class set the status and headers instead of + # waiting to do it manually, so that the class can handle any + # special logic + rv = self.response_class(rv, status=status, headers=headers) + status = headers = None + elif isinstance(rv, dict): + rv = jsonify(rv) + elif isinstance(rv, BaseResponse) or callable(rv): + # evaluate a WSGI callable, or coerce a different response + # class to the correct type + try: + rv = self.response_class.force_type(rv, request.environ) # type: ignore # noqa: B950 + except TypeError as e: + raise TypeError( + f"{e}\nThe view function did not return a valid" + " response. The return type must be a string," + " dict, tuple, Response instance, or WSGI" + f" callable, but it was a {type(rv).__name__}." + ).with_traceback(sys.exc_info()[2]) from None + else: + raise TypeError( + "The view function did not return a valid" + " response. The return type must be a string," + " dict, tuple, Response instance, or WSGI" + f" callable, but it was a {type(rv).__name__}." + ) + + rv = t.cast(Response, rv) + # prefer the status if it was provided + if status is not None: + if isinstance(status, (str, bytes, bytearray)): + rv.status = status # type: ignore + else: + rv.status_code = status + + # extend existing headers with provided headers + if headers: + rv.headers.update(headers) + + return rv + + def create_url_adapter( + self, request: t.Optional[Request] + ) -> t.Optional[MapAdapter]: + """Creates a URL adapter for the given request. The URL adapter + is created at a point where the request context is not yet set + up so the request is passed explicitly. + + .. versionadded:: 0.6 + + .. versionchanged:: 0.9 + This can now also be called without a request object when the + URL adapter is created for the application context. + + .. versionchanged:: 1.0 + :data:`SERVER_NAME` no longer implicitly enables subdomain + matching. Use :attr:`subdomain_matching` instead. + """ + if request is not None: + # If subdomain matching is disabled (the default), use the + # default subdomain in all cases. This should be the default + # in Werkzeug but it currently does not have that feature. + if not self.subdomain_matching: + subdomain = self.url_map.default_subdomain or None + else: + subdomain = None + + return self.url_map.bind_to_environ( + request.environ, + server_name=self.config["SERVER_NAME"], + subdomain=subdomain, + ) + # We need at the very least the server name to be set for this + # to work. + if self.config["SERVER_NAME"] is not None: + return self.url_map.bind( + self.config["SERVER_NAME"], + script_name=self.config["APPLICATION_ROOT"], + url_scheme=self.config["PREFERRED_URL_SCHEME"], + ) + + return None + + def inject_url_defaults(self, endpoint: str, values: dict) -> None: + """Injects the URL defaults for the given endpoint directly into + the values dictionary passed. This is used internally and + automatically called on URL building. + + .. versionadded:: 0.7 + """ + names: t.Iterable[t.Optional[str]] = (None,) + + # url_for may be called outside a request context, parse the + # passed endpoint instead of using request.blueprints. + if "." in endpoint: + names = chain( + names, reversed(_split_blueprint_path(endpoint.rpartition(".")[0])) + ) + + for name in names: + if name in self.url_default_functions: + for func in self.url_default_functions[name]: + func(endpoint, values) + + def handle_url_build_error( + self, error: Exception, endpoint: str, values: dict + ) -> str: + """Handle :class:`~werkzeug.routing.BuildError` on + :meth:`url_for`. + """ + for handler in self.url_build_error_handlers: + try: + rv = handler(error, endpoint, values) + except BuildError as e: + # make error available outside except block + error = e + else: + if rv is not None: + return rv + + # Re-raise if called with an active exception, otherwise raise + # the passed in exception. + if error is sys.exc_info()[1]: + raise + + raise error + + def preprocess_request(self) -> t.Optional[ResponseReturnValue]: + """Called before the request is dispatched. Calls + :attr:`url_value_preprocessors` registered with the app and the + current blueprint (if any). Then calls :attr:`before_request_funcs` + registered with the app and the blueprint. + + If any :meth:`before_request` handler returns a non-None value, the + value is handled as if it was the return value from the view, and + further request handling is stopped. + """ + names = (None, *reversed(request.blueprints)) + + for name in names: + if name in self.url_value_preprocessors: + for url_func in self.url_value_preprocessors[name]: + url_func(request.endpoint, request.view_args) + + for name in names: + if name in self.before_request_funcs: + for before_func in self.before_request_funcs[name]: + rv = self.ensure_sync(before_func)() + + if rv is not None: + return rv + + return None + + def process_response(self, response: Response) -> Response: + """Can be overridden in order to modify the response object + before it's sent to the WSGI server. By default this will + call all the :meth:`after_request` decorated functions. + + .. versionchanged:: 0.5 + As of Flask 0.5 the functions registered for after request + execution are called in reverse order of registration. + + :param response: a :attr:`response_class` object. + :return: a new response object or the same, has to be an + instance of :attr:`response_class`. + """ + ctx = _request_ctx_stack.top + + for func in ctx._after_request_functions: + response = self.ensure_sync(func)(response) + + for name in chain(request.blueprints, (None,)): + if name in self.after_request_funcs: + for func in reversed(self.after_request_funcs[name]): + response = self.ensure_sync(func)(response) + + if not self.session_interface.is_null_session(ctx.session): + self.session_interface.save_session(self, ctx.session, response) + + return response + + def do_teardown_request( + self, exc: t.Optional[BaseException] = _sentinel # type: ignore + ) -> None: + """Called after the request is dispatched and the response is + returned, right before the request context is popped. + + This calls all functions decorated with + :meth:`teardown_request`, and :meth:`Blueprint.teardown_request` + if a blueprint handled the request. Finally, the + :data:`request_tearing_down` signal is sent. + + This is called by + :meth:`RequestContext.pop() `, + which may be delayed during testing to maintain access to + resources. + + :param exc: An unhandled exception raised while dispatching the + request. Detected from the current exception information if + not passed. Passed to each teardown function. + + .. versionchanged:: 0.9 + Added the ``exc`` argument. + """ + if exc is _sentinel: + exc = sys.exc_info()[1] + + for name in chain(request.blueprints, (None,)): + if name in self.teardown_request_funcs: + for func in reversed(self.teardown_request_funcs[name]): + self.ensure_sync(func)(exc) + + request_tearing_down.send(self, exc=exc) + + def do_teardown_appcontext( + self, exc: t.Optional[BaseException] = _sentinel # type: ignore + ) -> None: + """Called right before the application context is popped. + + When handling a request, the application context is popped + after the request context. See :meth:`do_teardown_request`. + + This calls all functions decorated with + :meth:`teardown_appcontext`. Then the + :data:`appcontext_tearing_down` signal is sent. + + This is called by + :meth:`AppContext.pop() `. + + .. versionadded:: 0.9 + """ + if exc is _sentinel: + exc = sys.exc_info()[1] + + for func in reversed(self.teardown_appcontext_funcs): + self.ensure_sync(func)(exc) + + appcontext_tearing_down.send(self, exc=exc) + + def app_context(self) -> AppContext: + """Create an :class:`~flask.ctx.AppContext`. Use as a ``with`` + block to push the context, which will make :data:`current_app` + point at this application. + + An application context is automatically pushed by + :meth:`RequestContext.push() ` + when handling a request, and when running a CLI command. Use + this to manually create a context outside of these situations. + + :: + + with app.app_context(): + init_db() + + See :doc:`/appcontext`. + + .. versionadded:: 0.9 + """ + return AppContext(self) + + def request_context(self, environ: dict) -> RequestContext: + """Create a :class:`~flask.ctx.RequestContext` representing a + WSGI environment. Use a ``with`` block to push the context, + which will make :data:`request` point at this request. + + See :doc:`/reqcontext`. + + Typically you should not call this from your own code. A request + context is automatically pushed by the :meth:`wsgi_app` when + handling a request. Use :meth:`test_request_context` to create + an environment and context instead of this method. + + :param environ: a WSGI environment + """ + return RequestContext(self, environ) + + def test_request_context(self, *args: t.Any, **kwargs: t.Any) -> RequestContext: + """Create a :class:`~flask.ctx.RequestContext` for a WSGI + environment created from the given values. This is mostly useful + during testing, where you may want to run a function that uses + request data without dispatching a full request. + + See :doc:`/reqcontext`. + + Use a ``with`` block to push the context, which will make + :data:`request` point at the request for the created + environment. :: + + with test_request_context(...): + generate_report() + + When using the shell, it may be easier to push and pop the + context manually to avoid indentation. :: + + ctx = app.test_request_context(...) + ctx.push() + ... + ctx.pop() + + Takes the same arguments as Werkzeug's + :class:`~werkzeug.test.EnvironBuilder`, with some defaults from + the application. See the linked Werkzeug docs for most of the + available arguments. Flask-specific behavior is listed here. + + :param path: URL path being requested. + :param base_url: Base URL where the app is being served, which + ``path`` is relative to. If not given, built from + :data:`PREFERRED_URL_SCHEME`, ``subdomain``, + :data:`SERVER_NAME`, and :data:`APPLICATION_ROOT`. + :param subdomain: Subdomain name to append to + :data:`SERVER_NAME`. + :param url_scheme: Scheme to use instead of + :data:`PREFERRED_URL_SCHEME`. + :param data: The request body, either as a string or a dict of + form keys and values. + :param json: If given, this is serialized as JSON and passed as + ``data``. Also defaults ``content_type`` to + ``application/json``. + :param args: other positional arguments passed to + :class:`~werkzeug.test.EnvironBuilder`. + :param kwargs: other keyword arguments passed to + :class:`~werkzeug.test.EnvironBuilder`. + """ + from .testing import EnvironBuilder + + builder = EnvironBuilder(self, *args, **kwargs) + + try: + return self.request_context(builder.get_environ()) + finally: + builder.close() + + def wsgi_app(self, environ: dict, start_response: t.Callable) -> t.Any: + """The actual WSGI application. This is not implemented in + :meth:`__call__` so that middlewares can be applied without + losing a reference to the app object. Instead of doing this:: + + app = MyMiddleware(app) + + It's a better idea to do this instead:: + + app.wsgi_app = MyMiddleware(app.wsgi_app) + + Then you still have the original application object around and + can continue to call methods on it. + + .. versionchanged:: 0.7 + Teardown events for the request and app contexts are called + even if an unhandled error occurs. Other events may not be + called depending on when an error occurs during dispatch. + See :ref:`callbacks-and-errors`. + + :param environ: A WSGI environment. + :param start_response: A callable accepting a status code, + a list of headers, and an optional exception context to + start the response. + """ + ctx = self.request_context(environ) + error: t.Optional[BaseException] = None + try: + try: + ctx.push() + response = self.full_dispatch_request() + except Exception as e: + error = e + response = self.handle_exception(e) + except: # noqa: B001 + error = sys.exc_info()[1] + raise + return response(environ, start_response) + finally: + if self.should_ignore_error(error): + error = None + ctx.auto_pop(error) + + def __call__(self, environ: dict, start_response: t.Callable) -> t.Any: + """The WSGI server calls the Flask application object as the + WSGI application. This calls :meth:`wsgi_app`, which can be + wrapped to apply middleware. + """ + return self.wsgi_app(environ, start_response) diff --git a/.venv/lib/python3.6/site-packages/flask/blueprints.py b/.venv/lib/python3.6/site-packages/flask/blueprints.py new file mode 100644 index 0000000..5c23a73 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/flask/blueprints.py @@ -0,0 +1,609 @@ +import os +import typing as t +from collections import defaultdict +from functools import update_wrapper + +from .scaffold import _endpoint_from_view_func +from .scaffold import _sentinel +from .scaffold import Scaffold +from .typing import AfterRequestCallable +from .typing import BeforeFirstRequestCallable +from .typing import BeforeRequestCallable +from .typing import TeardownCallable +from .typing import TemplateContextProcessorCallable +from .typing import TemplateFilterCallable +from .typing import TemplateGlobalCallable +from .typing import TemplateTestCallable +from .typing import URLDefaultCallable +from .typing import URLValuePreprocessorCallable + +if t.TYPE_CHECKING: + from .app import Flask + from .typing import ErrorHandlerCallable + +DeferredSetupFunction = t.Callable[["BlueprintSetupState"], t.Callable] + + +class BlueprintSetupState: + """Temporary holder object for registering a blueprint with the + application. An instance of this class is created by the + :meth:`~flask.Blueprint.make_setup_state` method and later passed + to all register callback functions. + """ + + def __init__( + self, + blueprint: "Blueprint", + app: "Flask", + options: t.Any, + first_registration: bool, + ) -> None: + #: a reference to the current application + self.app = app + + #: a reference to the blueprint that created this setup state. + self.blueprint = blueprint + + #: a dictionary with all options that were passed to the + #: :meth:`~flask.Flask.register_blueprint` method. + self.options = options + + #: as blueprints can be registered multiple times with the + #: application and not everything wants to be registered + #: multiple times on it, this attribute can be used to figure + #: out if the blueprint was registered in the past already. + self.first_registration = first_registration + + subdomain = self.options.get("subdomain") + if subdomain is None: + subdomain = self.blueprint.subdomain + + #: The subdomain that the blueprint should be active for, ``None`` + #: otherwise. + self.subdomain = subdomain + + url_prefix = self.options.get("url_prefix") + if url_prefix is None: + url_prefix = self.blueprint.url_prefix + #: The prefix that should be used for all URLs defined on the + #: blueprint. + self.url_prefix = url_prefix + + self.name = self.options.get("name", blueprint.name) + self.name_prefix = self.options.get("name_prefix", "") + + #: A dictionary with URL defaults that is added to each and every + #: URL that was defined with the blueprint. + self.url_defaults = dict(self.blueprint.url_values_defaults) + self.url_defaults.update(self.options.get("url_defaults", ())) + + def add_url_rule( + self, + rule: str, + endpoint: t.Optional[str] = None, + view_func: t.Optional[t.Callable] = None, + **options: t.Any, + ) -> None: + """A helper method to register a rule (and optionally a view function) + to the application. The endpoint is automatically prefixed with the + blueprint's name. + """ + if self.url_prefix is not None: + if rule: + rule = "/".join((self.url_prefix.rstrip("/"), rule.lstrip("/"))) + else: + rule = self.url_prefix + options.setdefault("subdomain", self.subdomain) + if endpoint is None: + endpoint = _endpoint_from_view_func(view_func) # type: ignore + defaults = self.url_defaults + if "defaults" in options: + defaults = dict(defaults, **options.pop("defaults")) + + self.app.add_url_rule( + rule, + f"{self.name_prefix}.{self.name}.{endpoint}".lstrip("."), + view_func, + defaults=defaults, + **options, + ) + + +class Blueprint(Scaffold): + """Represents a blueprint, a collection of routes and other + app-related functions that can be registered on a real application + later. + + A blueprint is an object that allows defining application functions + without requiring an application object ahead of time. It uses the + same decorators as :class:`~flask.Flask`, but defers the need for an + application by recording them for later registration. + + Decorating a function with a blueprint creates a deferred function + that is called with :class:`~flask.blueprints.BlueprintSetupState` + when the blueprint is registered on an application. + + See :doc:`/blueprints` for more information. + + :param name: The name of the blueprint. Will be prepended to each + endpoint name. + :param import_name: The name of the blueprint package, usually + ``__name__``. This helps locate the ``root_path`` for the + blueprint. + :param static_folder: A folder with static files that should be + served by the blueprint's static route. The path is relative to + the blueprint's root path. Blueprint static files are disabled + by default. + :param static_url_path: The url to serve static files from. + Defaults to ``static_folder``. If the blueprint does not have + a ``url_prefix``, the app's static route will take precedence, + and the blueprint's static files won't be accessible. + :param template_folder: A folder with templates that should be added + to the app's template search path. The path is relative to the + blueprint's root path. Blueprint templates are disabled by + default. Blueprint templates have a lower precedence than those + in the app's templates folder. + :param url_prefix: A path to prepend to all of the blueprint's URLs, + to make them distinct from the rest of the app's routes. + :param subdomain: A subdomain that blueprint routes will match on by + default. + :param url_defaults: A dict of default values that blueprint routes + will receive by default. + :param root_path: By default, the blueprint will automatically set + this based on ``import_name``. In certain situations this + automatic detection can fail, so the path can be specified + manually instead. + + .. versionchanged:: 1.1.0 + Blueprints have a ``cli`` group to register nested CLI commands. + The ``cli_group`` parameter controls the name of the group under + the ``flask`` command. + + .. versionadded:: 0.7 + """ + + warn_on_modifications = False + _got_registered_once = False + + #: Blueprint local JSON encoder class to use. Set to ``None`` to use + #: the app's :class:`~flask.Flask.json_encoder`. + json_encoder = None + #: Blueprint local JSON decoder class to use. Set to ``None`` to use + #: the app's :class:`~flask.Flask.json_decoder`. + json_decoder = None + + def __init__( + self, + name: str, + import_name: str, + static_folder: t.Optional[t.Union[str, os.PathLike]] = None, + static_url_path: t.Optional[str] = None, + template_folder: t.Optional[str] = None, + url_prefix: t.Optional[str] = None, + subdomain: t.Optional[str] = None, + url_defaults: t.Optional[dict] = None, + root_path: t.Optional[str] = None, + cli_group: t.Optional[str] = _sentinel, # type: ignore + ): + super().__init__( + import_name=import_name, + static_folder=static_folder, + static_url_path=static_url_path, + template_folder=template_folder, + root_path=root_path, + ) + + if "." in name: + raise ValueError("'name' may not contain a dot '.' character.") + + self.name = name + self.url_prefix = url_prefix + self.subdomain = subdomain + self.deferred_functions: t.List[DeferredSetupFunction] = [] + + if url_defaults is None: + url_defaults = {} + + self.url_values_defaults = url_defaults + self.cli_group = cli_group + self._blueprints: t.List[t.Tuple["Blueprint", dict]] = [] + + def _is_setup_finished(self) -> bool: + return self.warn_on_modifications and self._got_registered_once + + def record(self, func: t.Callable) -> None: + """Registers a function that is called when the blueprint is + registered on the application. This function is called with the + state as argument as returned by the :meth:`make_setup_state` + method. + """ + if self._got_registered_once and self.warn_on_modifications: + from warnings import warn + + warn( + Warning( + "The blueprint was already registered once but is" + " getting modified now. These changes will not show" + " up." + ) + ) + self.deferred_functions.append(func) + + def record_once(self, func: t.Callable) -> None: + """Works like :meth:`record` but wraps the function in another + function that will ensure the function is only called once. If the + blueprint is registered a second time on the application, the + function passed is not called. + """ + + def wrapper(state: BlueprintSetupState) -> None: + if state.first_registration: + func(state) + + return self.record(update_wrapper(wrapper, func)) + + def make_setup_state( + self, app: "Flask", options: dict, first_registration: bool = False + ) -> BlueprintSetupState: + """Creates an instance of :meth:`~flask.blueprints.BlueprintSetupState` + object that is later passed to the register callback functions. + Subclasses can override this to return a subclass of the setup state. + """ + return BlueprintSetupState(self, app, options, first_registration) + + def register_blueprint(self, blueprint: "Blueprint", **options: t.Any) -> None: + """Register a :class:`~flask.Blueprint` on this blueprint. Keyword + arguments passed to this method will override the defaults set + on the blueprint. + + .. versionchanged:: 2.0.1 + The ``name`` option can be used to change the (pre-dotted) + name the blueprint is registered with. This allows the same + blueprint to be registered multiple times with unique names + for ``url_for``. + + .. versionadded:: 2.0 + """ + if blueprint is self: + raise ValueError("Cannot register a blueprint on itself") + self._blueprints.append((blueprint, options)) + + def register(self, app: "Flask", options: dict) -> None: + """Called by :meth:`Flask.register_blueprint` to register all + views and callbacks registered on the blueprint with the + application. Creates a :class:`.BlueprintSetupState` and calls + each :meth:`record` callback with it. + + :param app: The application this blueprint is being registered + with. + :param options: Keyword arguments forwarded from + :meth:`~Flask.register_blueprint`. + + .. versionchanged:: 2.0.1 + Nested blueprints are registered with their dotted name. + This allows different blueprints with the same name to be + nested at different locations. + + .. versionchanged:: 2.0.1 + The ``name`` option can be used to change the (pre-dotted) + name the blueprint is registered with. This allows the same + blueprint to be registered multiple times with unique names + for ``url_for``. + + .. versionchanged:: 2.0.1 + Registering the same blueprint with the same name multiple + times is deprecated and will become an error in Flask 2.1. + """ + name_prefix = options.get("name_prefix", "") + self_name = options.get("name", self.name) + name = f"{name_prefix}.{self_name}".lstrip(".") + + if name in app.blueprints: + existing_at = f" '{name}'" if self_name != name else "" + + if app.blueprints[name] is not self: + raise ValueError( + f"The name '{self_name}' is already registered for" + f" a different blueprint{existing_at}. Use 'name='" + " to provide a unique name." + ) + else: + import warnings + + warnings.warn( + f"The name '{self_name}' is already registered for" + f" this blueprint{existing_at}. Use 'name=' to" + " provide a unique name. This will become an error" + " in Flask 2.1.", + stacklevel=4, + ) + + first_bp_registration = not any(bp is self for bp in app.blueprints.values()) + first_name_registration = name not in app.blueprints + + app.blueprints[name] = self + self._got_registered_once = True + state = self.make_setup_state(app, options, first_bp_registration) + + if self.has_static_folder: + state.add_url_rule( + f"{self.static_url_path}/", + view_func=self.send_static_file, + endpoint="static", + ) + + # Merge blueprint data into parent. + if first_bp_registration or first_name_registration: + + def extend(bp_dict, parent_dict): + for key, values in bp_dict.items(): + key = name if key is None else f"{name}.{key}" + parent_dict[key].extend(values) + + for key, value in self.error_handler_spec.items(): + key = name if key is None else f"{name}.{key}" + value = defaultdict( + dict, + { + code: { + exc_class: func for exc_class, func in code_values.items() + } + for code, code_values in value.items() + }, + ) + app.error_handler_spec[key] = value + + for endpoint, func in self.view_functions.items(): + app.view_functions[endpoint] = func + + extend(self.before_request_funcs, app.before_request_funcs) + extend(self.after_request_funcs, app.after_request_funcs) + extend( + self.teardown_request_funcs, + app.teardown_request_funcs, + ) + extend(self.url_default_functions, app.url_default_functions) + extend(self.url_value_preprocessors, app.url_value_preprocessors) + extend(self.template_context_processors, app.template_context_processors) + + for deferred in self.deferred_functions: + deferred(state) + + cli_resolved_group = options.get("cli_group", self.cli_group) + + if self.cli.commands: + if cli_resolved_group is None: + app.cli.commands.update(self.cli.commands) + elif cli_resolved_group is _sentinel: + self.cli.name = name + app.cli.add_command(self.cli) + else: + self.cli.name = cli_resolved_group + app.cli.add_command(self.cli) + + for blueprint, bp_options in self._blueprints: + bp_options = bp_options.copy() + bp_url_prefix = bp_options.get("url_prefix") + + if bp_url_prefix is None: + bp_url_prefix = blueprint.url_prefix + + if state.url_prefix is not None and bp_url_prefix is not None: + bp_options["url_prefix"] = ( + state.url_prefix.rstrip("/") + "/" + bp_url_prefix.lstrip("/") + ) + elif bp_url_prefix is not None: + bp_options["url_prefix"] = bp_url_prefix + elif state.url_prefix is not None: + bp_options["url_prefix"] = state.url_prefix + + bp_options["name_prefix"] = name + blueprint.register(app, bp_options) + + def add_url_rule( + self, + rule: str, + endpoint: t.Optional[str] = None, + view_func: t.Optional[t.Callable] = None, + provide_automatic_options: t.Optional[bool] = None, + **options: t.Any, + ) -> None: + """Like :meth:`Flask.add_url_rule` but for a blueprint. The endpoint for + the :func:`url_for` function is prefixed with the name of the blueprint. + """ + if endpoint and "." in endpoint: + raise ValueError("'endpoint' may not contain a dot '.' character.") + + if view_func and hasattr(view_func, "__name__") and "." in view_func.__name__: + raise ValueError("'view_func' name may not contain a dot '.' character.") + + self.record( + lambda s: s.add_url_rule( + rule, + endpoint, + view_func, + provide_automatic_options=provide_automatic_options, + **options, + ) + ) + + def app_template_filter( + self, name: t.Optional[str] = None + ) -> t.Callable[[TemplateFilterCallable], TemplateFilterCallable]: + """Register a custom template filter, available application wide. Like + :meth:`Flask.template_filter` but for a blueprint. + + :param name: the optional name of the filter, otherwise the + function name will be used. + """ + + def decorator(f: TemplateFilterCallable) -> TemplateFilterCallable: + self.add_app_template_filter(f, name=name) + return f + + return decorator + + def add_app_template_filter( + self, f: TemplateFilterCallable, name: t.Optional[str] = None + ) -> None: + """Register a custom template filter, available application wide. Like + :meth:`Flask.add_template_filter` but for a blueprint. Works exactly + like the :meth:`app_template_filter` decorator. + + :param name: the optional name of the filter, otherwise the + function name will be used. + """ + + def register_template(state: BlueprintSetupState) -> None: + state.app.jinja_env.filters[name or f.__name__] = f + + self.record_once(register_template) + + def app_template_test( + self, name: t.Optional[str] = None + ) -> t.Callable[[TemplateTestCallable], TemplateTestCallable]: + """Register a custom template test, available application wide. Like + :meth:`Flask.template_test` but for a blueprint. + + .. versionadded:: 0.10 + + :param name: the optional name of the test, otherwise the + function name will be used. + """ + + def decorator(f: TemplateTestCallable) -> TemplateTestCallable: + self.add_app_template_test(f, name=name) + return f + + return decorator + + def add_app_template_test( + self, f: TemplateTestCallable, name: t.Optional[str] = None + ) -> None: + """Register a custom template test, available application wide. Like + :meth:`Flask.add_template_test` but for a blueprint. Works exactly + like the :meth:`app_template_test` decorator. + + .. versionadded:: 0.10 + + :param name: the optional name of the test, otherwise the + function name will be used. + """ + + def register_template(state: BlueprintSetupState) -> None: + state.app.jinja_env.tests[name or f.__name__] = f + + self.record_once(register_template) + + def app_template_global( + self, name: t.Optional[str] = None + ) -> t.Callable[[TemplateGlobalCallable], TemplateGlobalCallable]: + """Register a custom template global, available application wide. Like + :meth:`Flask.template_global` but for a blueprint. + + .. versionadded:: 0.10 + + :param name: the optional name of the global, otherwise the + function name will be used. + """ + + def decorator(f: TemplateGlobalCallable) -> TemplateGlobalCallable: + self.add_app_template_global(f, name=name) + return f + + return decorator + + def add_app_template_global( + self, f: TemplateGlobalCallable, name: t.Optional[str] = None + ) -> None: + """Register a custom template global, available application wide. Like + :meth:`Flask.add_template_global` but for a blueprint. Works exactly + like the :meth:`app_template_global` decorator. + + .. versionadded:: 0.10 + + :param name: the optional name of the global, otherwise the + function name will be used. + """ + + def register_template(state: BlueprintSetupState) -> None: + state.app.jinja_env.globals[name or f.__name__] = f + + self.record_once(register_template) + + def before_app_request(self, f: BeforeRequestCallable) -> BeforeRequestCallable: + """Like :meth:`Flask.before_request`. Such a function is executed + before each request, even if outside of a blueprint. + """ + self.record_once( + lambda s: s.app.before_request_funcs.setdefault(None, []).append(f) + ) + return f + + def before_app_first_request( + self, f: BeforeFirstRequestCallable + ) -> BeforeFirstRequestCallable: + """Like :meth:`Flask.before_first_request`. Such a function is + executed before the first request to the application. + """ + self.record_once(lambda s: s.app.before_first_request_funcs.append(f)) + return f + + def after_app_request(self, f: AfterRequestCallable) -> AfterRequestCallable: + """Like :meth:`Flask.after_request` but for a blueprint. Such a function + is executed after each request, even if outside of the blueprint. + """ + self.record_once( + lambda s: s.app.after_request_funcs.setdefault(None, []).append(f) + ) + return f + + def teardown_app_request(self, f: TeardownCallable) -> TeardownCallable: + """Like :meth:`Flask.teardown_request` but for a blueprint. Such a + function is executed when tearing down each request, even if outside of + the blueprint. + """ + self.record_once( + lambda s: s.app.teardown_request_funcs.setdefault(None, []).append(f) + ) + return f + + def app_context_processor( + self, f: TemplateContextProcessorCallable + ) -> TemplateContextProcessorCallable: + """Like :meth:`Flask.context_processor` but for a blueprint. Such a + function is executed each request, even if outside of the blueprint. + """ + self.record_once( + lambda s: s.app.template_context_processors.setdefault(None, []).append(f) + ) + return f + + def app_errorhandler(self, code: t.Union[t.Type[Exception], int]) -> t.Callable: + """Like :meth:`Flask.errorhandler` but for a blueprint. This + handler is used for all requests, even if outside of the blueprint. + """ + + def decorator( + f: "ErrorHandlerCallable[Exception]", + ) -> "ErrorHandlerCallable[Exception]": + self.record_once(lambda s: s.app.errorhandler(code)(f)) + return f + + return decorator + + def app_url_value_preprocessor( + self, f: URLValuePreprocessorCallable + ) -> URLValuePreprocessorCallable: + """Same as :meth:`url_value_preprocessor` but application wide.""" + self.record_once( + lambda s: s.app.url_value_preprocessors.setdefault(None, []).append(f) + ) + return f + + def app_url_defaults(self, f: URLDefaultCallable) -> URLDefaultCallable: + """Same as :meth:`url_defaults` but application wide.""" + self.record_once( + lambda s: s.app.url_default_functions.setdefault(None, []).append(f) + ) + return f diff --git a/.venv/lib/python3.6/site-packages/flask/cli.py b/.venv/lib/python3.6/site-packages/flask/cli.py new file mode 100644 index 0000000..7ab4fa1 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/flask/cli.py @@ -0,0 +1,998 @@ +import ast +import inspect +import os +import platform +import re +import sys +import traceback +import warnings +from functools import update_wrapper +from operator import attrgetter +from threading import Lock +from threading import Thread + +import click +from werkzeug.utils import import_string + +from .globals import current_app +from .helpers import get_debug_flag +from .helpers import get_env +from .helpers import get_load_dotenv + +try: + import dotenv +except ImportError: + dotenv = None + +try: + import ssl +except ImportError: + ssl = None # type: ignore + + +class NoAppException(click.UsageError): + """Raised if an application cannot be found or loaded.""" + + +def find_best_app(script_info, module): + """Given a module instance this tries to find the best possible + application in the module or raises an exception. + """ + from . import Flask + + # Search for the most common names first. + for attr_name in ("app", "application"): + app = getattr(module, attr_name, None) + + if isinstance(app, Flask): + return app + + # Otherwise find the only object that is a Flask instance. + matches = [v for v in module.__dict__.values() if isinstance(v, Flask)] + + if len(matches) == 1: + return matches[0] + elif len(matches) > 1: + raise NoAppException( + "Detected multiple Flask applications in module" + f" {module.__name__!r}. Use 'FLASK_APP={module.__name__}:name'" + f" to specify the correct one." + ) + + # Search for app factory functions. + for attr_name in ("create_app", "make_app"): + app_factory = getattr(module, attr_name, None) + + if inspect.isfunction(app_factory): + try: + app = call_factory(script_info, app_factory) + + if isinstance(app, Flask): + return app + except TypeError as e: + if not _called_with_wrong_args(app_factory): + raise + + raise NoAppException( + f"Detected factory {attr_name!r} in module {module.__name__!r}," + " but could not call it without arguments. Use" + f" \"FLASK_APP='{module.__name__}:{attr_name}(args)'\"" + " to specify arguments." + ) from e + + raise NoAppException( + "Failed to find Flask application or factory in module" + f" {module.__name__!r}. Use 'FLASK_APP={module.__name__}:name'" + " to specify one." + ) + + +def call_factory(script_info, app_factory, args=None, kwargs=None): + """Takes an app factory, a ``script_info` object and optionally a tuple + of arguments. Checks for the existence of a script_info argument and calls + the app_factory depending on that and the arguments provided. + """ + sig = inspect.signature(app_factory) + args = [] if args is None else args + kwargs = {} if kwargs is None else kwargs + + if "script_info" in sig.parameters: + warnings.warn( + "The 'script_info' argument is deprecated and will not be" + " passed to the app factory function in Flask 2.1.", + DeprecationWarning, + ) + kwargs["script_info"] = script_info + + if not args and len(sig.parameters) == 1: + first_parameter = next(iter(sig.parameters.values())) + + if ( + first_parameter.default is inspect.Parameter.empty + # **kwargs is reported as an empty default, ignore it + and first_parameter.kind is not inspect.Parameter.VAR_KEYWORD + ): + warnings.warn( + "Script info is deprecated and will not be passed as the" + " single argument to the app factory function in Flask" + " 2.1.", + DeprecationWarning, + ) + args.append(script_info) + + return app_factory(*args, **kwargs) + + +def _called_with_wrong_args(f): + """Check whether calling a function raised a ``TypeError`` because + the call failed or because something in the factory raised the + error. + + :param f: The function that was called. + :return: ``True`` if the call failed. + """ + tb = sys.exc_info()[2] + + try: + while tb is not None: + if tb.tb_frame.f_code is f.__code__: + # In the function, it was called successfully. + return False + + tb = tb.tb_next + + # Didn't reach the function. + return True + finally: + # Delete tb to break a circular reference. + # https://docs.python.org/2/library/sys.html#sys.exc_info + del tb + + +def find_app_by_string(script_info, module, app_name): + """Check if the given string is a variable name or a function. Call + a function to get the app instance, or return the variable directly. + """ + from . import Flask + + # Parse app_name as a single expression to determine if it's a valid + # attribute name or function call. + try: + expr = ast.parse(app_name.strip(), mode="eval").body + except SyntaxError: + raise NoAppException( + f"Failed to parse {app_name!r} as an attribute name or function call." + ) from None + + if isinstance(expr, ast.Name): + name = expr.id + args = kwargs = None + elif isinstance(expr, ast.Call): + # Ensure the function name is an attribute name only. + if not isinstance(expr.func, ast.Name): + raise NoAppException( + f"Function reference must be a simple name: {app_name!r}." + ) + + name = expr.func.id + + # Parse the positional and keyword arguments as literals. + try: + args = [ast.literal_eval(arg) for arg in expr.args] + kwargs = {kw.arg: ast.literal_eval(kw.value) for kw in expr.keywords} + except ValueError: + # literal_eval gives cryptic error messages, show a generic + # message with the full expression instead. + raise NoAppException( + f"Failed to parse arguments as literal values: {app_name!r}." + ) from None + else: + raise NoAppException( + f"Failed to parse {app_name!r} as an attribute name or function call." + ) + + try: + attr = getattr(module, name) + except AttributeError as e: + raise NoAppException( + f"Failed to find attribute {name!r} in {module.__name__!r}." + ) from e + + # If the attribute is a function, call it with any args and kwargs + # to get the real application. + if inspect.isfunction(attr): + try: + app = call_factory(script_info, attr, args, kwargs) + except TypeError as e: + if not _called_with_wrong_args(attr): + raise + + raise NoAppException( + f"The factory {app_name!r} in module" + f" {module.__name__!r} could not be called with the" + " specified arguments." + ) from e + else: + app = attr + + if isinstance(app, Flask): + return app + + raise NoAppException( + "A valid Flask application was not obtained from" + f" '{module.__name__}:{app_name}'." + ) + + +def prepare_import(path): + """Given a filename this will try to calculate the python path, add it + to the search path and return the actual module name that is expected. + """ + path = os.path.realpath(path) + + fname, ext = os.path.splitext(path) + if ext == ".py": + path = fname + + if os.path.basename(path) == "__init__": + path = os.path.dirname(path) + + module_name = [] + + # move up until outside package structure (no __init__.py) + while True: + path, name = os.path.split(path) + module_name.append(name) + + if not os.path.exists(os.path.join(path, "__init__.py")): + break + + if sys.path[0] != path: + sys.path.insert(0, path) + + return ".".join(module_name[::-1]) + + +def locate_app(script_info, module_name, app_name, raise_if_not_found=True): + __traceback_hide__ = True # noqa: F841 + + try: + __import__(module_name) + except ImportError as e: + # Reraise the ImportError if it occurred within the imported module. + # Determine this by checking whether the trace has a depth > 1. + if sys.exc_info()[2].tb_next: + raise NoAppException( + f"While importing {module_name!r}, an ImportError was raised." + ) from e + elif raise_if_not_found: + raise NoAppException(f"Could not import {module_name!r}.") from e + else: + return + + module = sys.modules[module_name] + + if app_name is None: + return find_best_app(script_info, module) + else: + return find_app_by_string(script_info, module, app_name) + + +def get_version(ctx, param, value): + if not value or ctx.resilient_parsing: + return + + import werkzeug + from . import __version__ + + click.echo( + f"Python {platform.python_version()}\n" + f"Flask {__version__}\n" + f"Werkzeug {werkzeug.__version__}", + color=ctx.color, + ) + ctx.exit() + + +version_option = click.Option( + ["--version"], + help="Show the flask version", + expose_value=False, + callback=get_version, + is_flag=True, + is_eager=True, +) + + +class DispatchingApp: + """Special application that dispatches to a Flask application which + is imported by name in a background thread. If an error happens + it is recorded and shown as part of the WSGI handling which in case + of the Werkzeug debugger means that it shows up in the browser. + """ + + def __init__(self, loader, use_eager_loading=None): + self.loader = loader + self._app = None + self._lock = Lock() + self._bg_loading_exc = None + + if use_eager_loading is None: + use_eager_loading = os.environ.get("WERKZEUG_RUN_MAIN") != "true" + + if use_eager_loading: + self._load_unlocked() + else: + self._load_in_background() + + def _load_in_background(self): + def _load_app(): + __traceback_hide__ = True # noqa: F841 + with self._lock: + try: + self._load_unlocked() + except Exception as e: + self._bg_loading_exc = e + + t = Thread(target=_load_app, args=()) + t.start() + + def _flush_bg_loading_exception(self): + __traceback_hide__ = True # noqa: F841 + exc = self._bg_loading_exc + + if exc is not None: + self._bg_loading_exc = None + raise exc + + def _load_unlocked(self): + __traceback_hide__ = True # noqa: F841 + self._app = rv = self.loader() + self._bg_loading_exc = None + return rv + + def __call__(self, environ, start_response): + __traceback_hide__ = True # noqa: F841 + if self._app is not None: + return self._app(environ, start_response) + self._flush_bg_loading_exception() + with self._lock: + if self._app is not None: + rv = self._app + else: + rv = self._load_unlocked() + return rv(environ, start_response) + + +class ScriptInfo: + """Helper object to deal with Flask applications. This is usually not + necessary to interface with as it's used internally in the dispatching + to click. In future versions of Flask this object will most likely play + a bigger role. Typically it's created automatically by the + :class:`FlaskGroup` but you can also manually create it and pass it + onwards as click object. + """ + + def __init__(self, app_import_path=None, create_app=None, set_debug_flag=True): + #: Optionally the import path for the Flask application. + self.app_import_path = app_import_path or os.environ.get("FLASK_APP") + #: Optionally a function that is passed the script info to create + #: the instance of the application. + self.create_app = create_app + #: A dictionary with arbitrary data that can be associated with + #: this script info. + self.data = {} + self.set_debug_flag = set_debug_flag + self._loaded_app = None + + def load_app(self): + """Loads the Flask app (if not yet loaded) and returns it. Calling + this multiple times will just result in the already loaded app to + be returned. + """ + __traceback_hide__ = True # noqa: F841 + + if self._loaded_app is not None: + return self._loaded_app + + if self.create_app is not None: + app = call_factory(self, self.create_app) + else: + if self.app_import_path: + path, name = ( + re.split(r":(?![\\/])", self.app_import_path, 1) + [None] + )[:2] + import_name = prepare_import(path) + app = locate_app(self, import_name, name) + else: + for path in ("wsgi.py", "app.py"): + import_name = prepare_import(path) + app = locate_app(self, import_name, None, raise_if_not_found=False) + + if app: + break + + if not app: + raise NoAppException( + "Could not locate a Flask application. You did not provide " + 'the "FLASK_APP" environment variable, and a "wsgi.py" or ' + '"app.py" module was not found in the current directory.' + ) + + if self.set_debug_flag: + # Update the app's debug flag through the descriptor so that + # other values repopulate as well. + app.debug = get_debug_flag() + + self._loaded_app = app + return app + + +pass_script_info = click.make_pass_decorator(ScriptInfo, ensure=True) + + +def with_appcontext(f): + """Wraps a callback so that it's guaranteed to be executed with the + script's application context. If callbacks are registered directly + to the ``app.cli`` object then they are wrapped with this function + by default unless it's disabled. + """ + + @click.pass_context + def decorator(__ctx, *args, **kwargs): + with __ctx.ensure_object(ScriptInfo).load_app().app_context(): + return __ctx.invoke(f, *args, **kwargs) + + return update_wrapper(decorator, f) + + +class AppGroup(click.Group): + """This works similar to a regular click :class:`~click.Group` but it + changes the behavior of the :meth:`command` decorator so that it + automatically wraps the functions in :func:`with_appcontext`. + + Not to be confused with :class:`FlaskGroup`. + """ + + def command(self, *args, **kwargs): + """This works exactly like the method of the same name on a regular + :class:`click.Group` but it wraps callbacks in :func:`with_appcontext` + unless it's disabled by passing ``with_appcontext=False``. + """ + wrap_for_ctx = kwargs.pop("with_appcontext", True) + + def decorator(f): + if wrap_for_ctx: + f = with_appcontext(f) + return click.Group.command(self, *args, **kwargs)(f) + + return decorator + + def group(self, *args, **kwargs): + """This works exactly like the method of the same name on a regular + :class:`click.Group` but it defaults the group class to + :class:`AppGroup`. + """ + kwargs.setdefault("cls", AppGroup) + return click.Group.group(self, *args, **kwargs) + + +class FlaskGroup(AppGroup): + """Special subclass of the :class:`AppGroup` group that supports + loading more commands from the configured Flask app. Normally a + developer does not have to interface with this class but there are + some very advanced use cases for which it makes sense to create an + instance of this. see :ref:`custom-scripts`. + + :param add_default_commands: if this is True then the default run and + shell commands will be added. + :param add_version_option: adds the ``--version`` option. + :param create_app: an optional callback that is passed the script info and + returns the loaded app. + :param load_dotenv: Load the nearest :file:`.env` and :file:`.flaskenv` + files to set environment variables. Will also change the working + directory to the directory containing the first file found. + :param set_debug_flag: Set the app's debug flag based on the active + environment + + .. versionchanged:: 1.0 + If installed, python-dotenv will be used to load environment variables + from :file:`.env` and :file:`.flaskenv` files. + """ + + def __init__( + self, + add_default_commands=True, + create_app=None, + add_version_option=True, + load_dotenv=True, + set_debug_flag=True, + **extra, + ): + params = list(extra.pop("params", None) or ()) + + if add_version_option: + params.append(version_option) + + AppGroup.__init__(self, params=params, **extra) + self.create_app = create_app + self.load_dotenv = load_dotenv + self.set_debug_flag = set_debug_flag + + if add_default_commands: + self.add_command(run_command) + self.add_command(shell_command) + self.add_command(routes_command) + + self._loaded_plugin_commands = False + + def _load_plugin_commands(self): + if self._loaded_plugin_commands: + return + try: + import pkg_resources + except ImportError: + self._loaded_plugin_commands = True + return + + for ep in pkg_resources.iter_entry_points("flask.commands"): + self.add_command(ep.load(), ep.name) + self._loaded_plugin_commands = True + + def get_command(self, ctx, name): + self._load_plugin_commands() + # Look up built-in and plugin commands, which should be + # available even if the app fails to load. + rv = super().get_command(ctx, name) + + if rv is not None: + return rv + + info = ctx.ensure_object(ScriptInfo) + + # Look up commands provided by the app, showing an error and + # continuing if the app couldn't be loaded. + try: + return info.load_app().cli.get_command(ctx, name) + except NoAppException as e: + click.secho(f"Error: {e.format_message()}\n", err=True, fg="red") + + def list_commands(self, ctx): + self._load_plugin_commands() + # Start with the built-in and plugin commands. + rv = set(super().list_commands(ctx)) + info = ctx.ensure_object(ScriptInfo) + + # Add commands provided by the app, showing an error and + # continuing if the app couldn't be loaded. + try: + rv.update(info.load_app().cli.list_commands(ctx)) + except NoAppException as e: + # When an app couldn't be loaded, show the error message + # without the traceback. + click.secho(f"Error: {e.format_message()}\n", err=True, fg="red") + except Exception: + # When any other errors occurred during loading, show the + # full traceback. + click.secho(f"{traceback.format_exc()}\n", err=True, fg="red") + + return sorted(rv) + + def main(self, *args, **kwargs): + # Set a global flag that indicates that we were invoked from the + # command line interface. This is detected by Flask.run to make the + # call into a no-op. This is necessary to avoid ugly errors when the + # script that is loaded here also attempts to start a server. + os.environ["FLASK_RUN_FROM_CLI"] = "true" + + if get_load_dotenv(self.load_dotenv): + load_dotenv() + + obj = kwargs.get("obj") + + if obj is None: + obj = ScriptInfo( + create_app=self.create_app, set_debug_flag=self.set_debug_flag + ) + + kwargs["obj"] = obj + kwargs.setdefault("auto_envvar_prefix", "FLASK") + return super().main(*args, **kwargs) + + +def _path_is_ancestor(path, other): + """Take ``other`` and remove the length of ``path`` from it. Then join it + to ``path``. If it is the original value, ``path`` is an ancestor of + ``other``.""" + return os.path.join(path, other[len(path) :].lstrip(os.sep)) == other + + +def load_dotenv(path=None): + """Load "dotenv" files in order of precedence to set environment variables. + + If an env var is already set it is not overwritten, so earlier files in the + list are preferred over later files. + + This is a no-op if `python-dotenv`_ is not installed. + + .. _python-dotenv: https://github.com/theskumar/python-dotenv#readme + + :param path: Load the file at this location instead of searching. + :return: ``True`` if a file was loaded. + + .. versionchanged:: 1.1.0 + Returns ``False`` when python-dotenv is not installed, or when + the given path isn't a file. + + .. versionchanged:: 2.0 + When loading the env files, set the default encoding to UTF-8. + + .. versionadded:: 1.0 + """ + if dotenv is None: + if path or os.path.isfile(".env") or os.path.isfile(".flaskenv"): + click.secho( + " * Tip: There are .env or .flaskenv files present." + ' Do "pip install python-dotenv" to use them.', + fg="yellow", + err=True, + ) + + return False + + # if the given path specifies the actual file then return True, + # else False + if path is not None: + if os.path.isfile(path): + return dotenv.load_dotenv(path, encoding="utf-8") + + return False + + new_dir = None + + for name in (".env", ".flaskenv"): + path = dotenv.find_dotenv(name, usecwd=True) + + if not path: + continue + + if new_dir is None: + new_dir = os.path.dirname(path) + + dotenv.load_dotenv(path, encoding="utf-8") + + return new_dir is not None # at least one file was located and loaded + + +def show_server_banner(env, debug, app_import_path, eager_loading): + """Show extra startup messages the first time the server is run, + ignoring the reloader. + """ + if os.environ.get("WERKZEUG_RUN_MAIN") == "true": + return + + if app_import_path is not None: + message = f" * Serving Flask app {app_import_path!r}" + + if not eager_loading: + message += " (lazy loading)" + + click.echo(message) + + click.echo(f" * Environment: {env}") + + if env == "production": + click.secho( + " WARNING: This is a development server. Do not use it in" + " a production deployment.", + fg="red", + ) + click.secho(" Use a production WSGI server instead.", dim=True) + + if debug is not None: + click.echo(f" * Debug mode: {'on' if debug else 'off'}") + + +class CertParamType(click.ParamType): + """Click option type for the ``--cert`` option. Allows either an + existing file, the string ``'adhoc'``, or an import for a + :class:`~ssl.SSLContext` object. + """ + + name = "path" + + def __init__(self): + self.path_type = click.Path(exists=True, dir_okay=False, resolve_path=True) + + def convert(self, value, param, ctx): + if ssl is None: + raise click.BadParameter( + 'Using "--cert" requires Python to be compiled with SSL support.', + ctx, + param, + ) + + try: + return self.path_type(value, param, ctx) + except click.BadParameter: + value = click.STRING(value, param, ctx).lower() + + if value == "adhoc": + try: + import cryptography # noqa: F401 + except ImportError: + raise click.BadParameter( + "Using ad-hoc certificates requires the cryptography library.", + ctx, + param, + ) from None + + return value + + obj = import_string(value, silent=True) + + if isinstance(obj, ssl.SSLContext): + return obj + + raise + + +def _validate_key(ctx, param, value): + """The ``--key`` option must be specified when ``--cert`` is a file. + Modifies the ``cert`` param to be a ``(cert, key)`` pair if needed. + """ + cert = ctx.params.get("cert") + is_adhoc = cert == "adhoc" + is_context = ssl and isinstance(cert, ssl.SSLContext) + + if value is not None: + if is_adhoc: + raise click.BadParameter( + 'When "--cert" is "adhoc", "--key" is not used.', ctx, param + ) + + if is_context: + raise click.BadParameter( + 'When "--cert" is an SSLContext object, "--key is not used.', ctx, param + ) + + if not cert: + raise click.BadParameter('"--cert" must also be specified.', ctx, param) + + ctx.params["cert"] = cert, value + + else: + if cert and not (is_adhoc or is_context): + raise click.BadParameter('Required when using "--cert".', ctx, param) + + return value + + +class SeparatedPathType(click.Path): + """Click option type that accepts a list of values separated by the + OS's path separator (``:``, ``;`` on Windows). Each value is + validated as a :class:`click.Path` type. + """ + + def convert(self, value, param, ctx): + items = self.split_envvar_value(value) + super_convert = super().convert + return [super_convert(item, param, ctx) for item in items] + + +@click.command("run", short_help="Run a development server.") +@click.option("--host", "-h", default="127.0.0.1", help="The interface to bind to.") +@click.option("--port", "-p", default=5000, help="The port to bind to.") +@click.option( + "--cert", type=CertParamType(), help="Specify a certificate file to use HTTPS." +) +@click.option( + "--key", + type=click.Path(exists=True, dir_okay=False, resolve_path=True), + callback=_validate_key, + expose_value=False, + help="The key file to use when specifying a certificate.", +) +@click.option( + "--reload/--no-reload", + default=None, + help="Enable or disable the reloader. By default the reloader " + "is active if debug is enabled.", +) +@click.option( + "--debugger/--no-debugger", + default=None, + help="Enable or disable the debugger. By default the debugger " + "is active if debug is enabled.", +) +@click.option( + "--eager-loading/--lazy-loading", + default=None, + help="Enable or disable eager loading. By default eager " + "loading is enabled if the reloader is disabled.", +) +@click.option( + "--with-threads/--without-threads", + default=True, + help="Enable or disable multithreading.", +) +@click.option( + "--extra-files", + default=None, + type=SeparatedPathType(), + help=( + "Extra files that trigger a reload on change. Multiple paths" + f" are separated by {os.path.pathsep!r}." + ), +) +@pass_script_info +def run_command( + info, host, port, reload, debugger, eager_loading, with_threads, cert, extra_files +): + """Run a local development server. + + This server is for development purposes only. It does not provide + the stability, security, or performance of production WSGI servers. + + The reloader and debugger are enabled by default if + FLASK_ENV=development or FLASK_DEBUG=1. + """ + debug = get_debug_flag() + + if reload is None: + reload = debug + + if debugger is None: + debugger = debug + + show_server_banner(get_env(), debug, info.app_import_path, eager_loading) + app = DispatchingApp(info.load_app, use_eager_loading=eager_loading) + + from werkzeug.serving import run_simple + + run_simple( + host, + port, + app, + use_reloader=reload, + use_debugger=debugger, + threaded=with_threads, + ssl_context=cert, + extra_files=extra_files, + ) + + +@click.command("shell", short_help="Run a shell in the app context.") +@with_appcontext +def shell_command() -> None: + """Run an interactive Python shell in the context of a given + Flask application. The application will populate the default + namespace of this shell according to its configuration. + + This is useful for executing small snippets of management code + without having to manually configure the application. + """ + import code + from .globals import _app_ctx_stack + + app = _app_ctx_stack.top.app + banner = ( + f"Python {sys.version} on {sys.platform}\n" + f"App: {app.import_name} [{app.env}]\n" + f"Instance: {app.instance_path}" + ) + ctx: dict = {} + + # Support the regular Python interpreter startup script if someone + # is using it. + startup = os.environ.get("PYTHONSTARTUP") + if startup and os.path.isfile(startup): + with open(startup) as f: + eval(compile(f.read(), startup, "exec"), ctx) + + ctx.update(app.make_shell_context()) + + # Site, customize, or startup script can set a hook to call when + # entering interactive mode. The default one sets up readline with + # tab and history completion. + interactive_hook = getattr(sys, "__interactivehook__", None) + + if interactive_hook is not None: + try: + import readline + from rlcompleter import Completer + except ImportError: + pass + else: + # rlcompleter uses __main__.__dict__ by default, which is + # flask.__main__. Use the shell context instead. + readline.set_completer(Completer(ctx).complete) + + interactive_hook() + + code.interact(banner=banner, local=ctx) + + +@click.command("routes", short_help="Show the routes for the app.") +@click.option( + "--sort", + "-s", + type=click.Choice(("endpoint", "methods", "rule", "match")), + default="endpoint", + help=( + 'Method to sort routes by. "match" is the order that Flask will match ' + "routes when dispatching a request." + ), +) +@click.option("--all-methods", is_flag=True, help="Show HEAD and OPTIONS methods.") +@with_appcontext +def routes_command(sort: str, all_methods: bool) -> None: + """Show all registered routes with endpoints and methods.""" + + rules = list(current_app.url_map.iter_rules()) + if not rules: + click.echo("No routes were registered.") + return + + ignored_methods = set(() if all_methods else ("HEAD", "OPTIONS")) + + if sort in ("endpoint", "rule"): + rules = sorted(rules, key=attrgetter(sort)) + elif sort == "methods": + rules = sorted(rules, key=lambda rule: sorted(rule.methods)) # type: ignore + + rule_methods = [ + ", ".join(sorted(rule.methods - ignored_methods)) # type: ignore + for rule in rules + ] + + headers = ("Endpoint", "Methods", "Rule") + widths = ( + max(len(rule.endpoint) for rule in rules), + max(len(methods) for methods in rule_methods), + max(len(rule.rule) for rule in rules), + ) + widths = [max(len(h), w) for h, w in zip(headers, widths)] + row = "{{0:<{0}}} {{1:<{1}}} {{2:<{2}}}".format(*widths) + + click.echo(row.format(*headers).strip()) + click.echo(row.format(*("-" * width for width in widths))) + + for rule, methods in zip(rules, rule_methods): + click.echo(row.format(rule.endpoint, methods, rule.rule).rstrip()) + + +cli = FlaskGroup( + help="""\ +A general utility script for Flask applications. + +Provides commands from Flask, extensions, and the application. Loads the +application defined in the FLASK_APP environment variable, or from a wsgi.py +file. Setting the FLASK_ENV environment variable to 'development' will enable +debug mode. + +\b + {prefix}{cmd} FLASK_APP=hello.py + {prefix}{cmd} FLASK_ENV=development + {prefix}flask run +""".format( + cmd="export" if os.name == "posix" else "set", + prefix="$ " if os.name == "posix" else "> ", + ) +) + + +def main() -> None: + if int(click.__version__[0]) < 8: + warnings.warn( + "Using the `flask` cli with Click 7 is deprecated and" + " will not be supported starting with Flask 2.1." + " Please upgrade to Click 8 as soon as possible.", + DeprecationWarning, + ) + # TODO omit sys.argv once https://github.com/pallets/click/issues/536 is fixed + cli.main(args=sys.argv[1:]) + + +if __name__ == "__main__": + main() diff --git a/.venv/lib/python3.6/site-packages/flask/config.py b/.venv/lib/python3.6/site-packages/flask/config.py new file mode 100644 index 0000000..ca76902 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/flask/config.py @@ -0,0 +1,295 @@ +import errno +import os +import types +import typing as t + +from werkzeug.utils import import_string + + +class ConfigAttribute: + """Makes an attribute forward to the config""" + + def __init__(self, name: str, get_converter: t.Optional[t.Callable] = None) -> None: + self.__name__ = name + self.get_converter = get_converter + + def __get__(self, obj: t.Any, owner: t.Any = None) -> t.Any: + if obj is None: + return self + rv = obj.config[self.__name__] + if self.get_converter is not None: + rv = self.get_converter(rv) + return rv + + def __set__(self, obj: t.Any, value: t.Any) -> None: + obj.config[self.__name__] = value + + +class Config(dict): + """Works exactly like a dict but provides ways to fill it from files + or special dictionaries. There are two common patterns to populate the + config. + + Either you can fill the config from a config file:: + + app.config.from_pyfile('yourconfig.cfg') + + Or alternatively you can define the configuration options in the + module that calls :meth:`from_object` or provide an import path to + a module that should be loaded. It is also possible to tell it to + use the same module and with that provide the configuration values + just before the call:: + + DEBUG = True + SECRET_KEY = 'development key' + app.config.from_object(__name__) + + In both cases (loading from any Python file or loading from modules), + only uppercase keys are added to the config. This makes it possible to use + lowercase values in the config file for temporary values that are not added + to the config or to define the config keys in the same file that implements + the application. + + Probably the most interesting way to load configurations is from an + environment variable pointing to a file:: + + app.config.from_envvar('YOURAPPLICATION_SETTINGS') + + In this case before launching the application you have to set this + environment variable to the file you want to use. On Linux and OS X + use the export statement:: + + export YOURAPPLICATION_SETTINGS='/path/to/config/file' + + On windows use `set` instead. + + :param root_path: path to which files are read relative from. When the + config object is created by the application, this is + the application's :attr:`~flask.Flask.root_path`. + :param defaults: an optional dictionary of default values + """ + + def __init__(self, root_path: str, defaults: t.Optional[dict] = None) -> None: + dict.__init__(self, defaults or {}) + self.root_path = root_path + + def from_envvar(self, variable_name: str, silent: bool = False) -> bool: + """Loads a configuration from an environment variable pointing to + a configuration file. This is basically just a shortcut with nicer + error messages for this line of code:: + + app.config.from_pyfile(os.environ['YOURAPPLICATION_SETTINGS']) + + :param variable_name: name of the environment variable + :param silent: set to ``True`` if you want silent failure for missing + files. + :return: ``True`` if the file was loaded successfully. + """ + rv = os.environ.get(variable_name) + if not rv: + if silent: + return False + raise RuntimeError( + f"The environment variable {variable_name!r} is not set" + " and as such configuration could not be loaded. Set" + " this variable and make it point to a configuration" + " file" + ) + return self.from_pyfile(rv, silent=silent) + + def from_pyfile(self, filename: str, silent: bool = False) -> bool: + """Updates the values in the config from a Python file. This function + behaves as if the file was imported as module with the + :meth:`from_object` function. + + :param filename: the filename of the config. This can either be an + absolute filename or a filename relative to the + root path. + :param silent: set to ``True`` if you want silent failure for missing + files. + :return: ``True`` if the file was loaded successfully. + + .. versionadded:: 0.7 + `silent` parameter. + """ + filename = os.path.join(self.root_path, filename) + d = types.ModuleType("config") + d.__file__ = filename + try: + with open(filename, mode="rb") as config_file: + exec(compile(config_file.read(), filename, "exec"), d.__dict__) + except OSError as e: + if silent and e.errno in (errno.ENOENT, errno.EISDIR, errno.ENOTDIR): + return False + e.strerror = f"Unable to load configuration file ({e.strerror})" + raise + self.from_object(d) + return True + + def from_object(self, obj: t.Union[object, str]) -> None: + """Updates the values from the given object. An object can be of one + of the following two types: + + - a string: in this case the object with that name will be imported + - an actual object reference: that object is used directly + + Objects are usually either modules or classes. :meth:`from_object` + loads only the uppercase attributes of the module/class. A ``dict`` + object will not work with :meth:`from_object` because the keys of a + ``dict`` are not attributes of the ``dict`` class. + + Example of module-based configuration:: + + app.config.from_object('yourapplication.default_config') + from yourapplication import default_config + app.config.from_object(default_config) + + Nothing is done to the object before loading. If the object is a + class and has ``@property`` attributes, it needs to be + instantiated before being passed to this method. + + You should not use this function to load the actual configuration but + rather configuration defaults. The actual config should be loaded + with :meth:`from_pyfile` and ideally from a location not within the + package because the package might be installed system wide. + + See :ref:`config-dev-prod` for an example of class-based configuration + using :meth:`from_object`. + + :param obj: an import name or object + """ + if isinstance(obj, str): + obj = import_string(obj) + for key in dir(obj): + if key.isupper(): + self[key] = getattr(obj, key) + + def from_file( + self, + filename: str, + load: t.Callable[[t.IO[t.Any]], t.Mapping], + silent: bool = False, + ) -> bool: + """Update the values in the config from a file that is loaded + using the ``load`` parameter. The loaded data is passed to the + :meth:`from_mapping` method. + + .. code-block:: python + + import toml + app.config.from_file("config.toml", load=toml.load) + + :param filename: The path to the data file. This can be an + absolute path or relative to the config root path. + :param load: A callable that takes a file handle and returns a + mapping of loaded data from the file. + :type load: ``Callable[[Reader], Mapping]`` where ``Reader`` + implements a ``read`` method. + :param silent: Ignore the file if it doesn't exist. + :return: ``True`` if the file was loaded successfully. + + .. versionadded:: 2.0 + """ + filename = os.path.join(self.root_path, filename) + + try: + with open(filename) as f: + obj = load(f) + except OSError as e: + if silent and e.errno in (errno.ENOENT, errno.EISDIR): + return False + + e.strerror = f"Unable to load configuration file ({e.strerror})" + raise + + return self.from_mapping(obj) + + def from_json(self, filename: str, silent: bool = False) -> bool: + """Update the values in the config from a JSON file. The loaded + data is passed to the :meth:`from_mapping` method. + + :param filename: The path to the JSON file. This can be an + absolute path or relative to the config root path. + :param silent: Ignore the file if it doesn't exist. + :return: ``True`` if the file was loaded successfully. + + .. deprecated:: 2.0.0 + Will be removed in Flask 2.1. Use :meth:`from_file` instead. + This was removed early in 2.0.0, was added back in 2.0.1. + + .. versionadded:: 0.11 + """ + import warnings + from . import json + + warnings.warn( + "'from_json' is deprecated and will be removed in Flask" + " 2.1. Use 'from_file(path, json.load)' instead.", + DeprecationWarning, + stacklevel=2, + ) + return self.from_file(filename, json.load, silent=silent) + + def from_mapping( + self, mapping: t.Optional[t.Mapping[str, t.Any]] = None, **kwargs: t.Any + ) -> bool: + """Updates the config like :meth:`update` ignoring items with non-upper + keys. + :return: Always returns ``True``. + + .. versionadded:: 0.11 + """ + mappings: t.Dict[str, t.Any] = {} + if mapping is not None: + mappings.update(mapping) + mappings.update(kwargs) + for key, value in mappings.items(): + if key.isupper(): + self[key] = value + return True + + def get_namespace( + self, namespace: str, lowercase: bool = True, trim_namespace: bool = True + ) -> t.Dict[str, t.Any]: + """Returns a dictionary containing a subset of configuration options + that match the specified namespace/prefix. Example usage:: + + app.config['IMAGE_STORE_TYPE'] = 'fs' + app.config['IMAGE_STORE_PATH'] = '/var/app/images' + app.config['IMAGE_STORE_BASE_URL'] = 'http://img.website.com' + image_store_config = app.config.get_namespace('IMAGE_STORE_') + + The resulting dictionary `image_store_config` would look like:: + + { + 'type': 'fs', + 'path': '/var/app/images', + 'base_url': 'http://img.website.com' + } + + This is often useful when configuration options map directly to + keyword arguments in functions or class constructors. + + :param namespace: a configuration namespace + :param lowercase: a flag indicating if the keys of the resulting + dictionary should be lowercase + :param trim_namespace: a flag indicating if the keys of the resulting + dictionary should not include the namespace + + .. versionadded:: 0.11 + """ + rv = {} + for k, v in self.items(): + if not k.startswith(namespace): + continue + if trim_namespace: + key = k[len(namespace) :] + else: + key = k + if lowercase: + key = key.lower() + rv[key] = v + return rv + + def __repr__(self) -> str: + return f"<{type(self).__name__} {dict.__repr__(self)}>" diff --git a/.venv/lib/python3.6/site-packages/flask/ctx.py b/.venv/lib/python3.6/site-packages/flask/ctx.py new file mode 100644 index 0000000..5c06463 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/flask/ctx.py @@ -0,0 +1,480 @@ +import sys +import typing as t +from functools import update_wrapper +from types import TracebackType + +from werkzeug.exceptions import HTTPException + +from .globals import _app_ctx_stack +from .globals import _request_ctx_stack +from .signals import appcontext_popped +from .signals import appcontext_pushed +from .typing import AfterRequestCallable + +if t.TYPE_CHECKING: + from .app import Flask + from .sessions import SessionMixin + from .wrappers import Request + + +# a singleton sentinel value for parameter defaults +_sentinel = object() + + +class _AppCtxGlobals: + """A plain object. Used as a namespace for storing data during an + application context. + + Creating an app context automatically creates this object, which is + made available as the :data:`g` proxy. + + .. describe:: 'key' in g + + Check whether an attribute is present. + + .. versionadded:: 0.10 + + .. describe:: iter(g) + + Return an iterator over the attribute names. + + .. versionadded:: 0.10 + """ + + # Define attr methods to let mypy know this is a namespace object + # that has arbitrary attributes. + + def __getattr__(self, name: str) -> t.Any: + try: + return self.__dict__[name] + except KeyError: + raise AttributeError(name) from None + + def __setattr__(self, name: str, value: t.Any) -> None: + self.__dict__[name] = value + + def __delattr__(self, name: str) -> None: + try: + del self.__dict__[name] + except KeyError: + raise AttributeError(name) from None + + def get(self, name: str, default: t.Optional[t.Any] = None) -> t.Any: + """Get an attribute by name, or a default value. Like + :meth:`dict.get`. + + :param name: Name of attribute to get. + :param default: Value to return if the attribute is not present. + + .. versionadded:: 0.10 + """ + return self.__dict__.get(name, default) + + def pop(self, name: str, default: t.Any = _sentinel) -> t.Any: + """Get and remove an attribute by name. Like :meth:`dict.pop`. + + :param name: Name of attribute to pop. + :param default: Value to return if the attribute is not present, + instead of raising a ``KeyError``. + + .. versionadded:: 0.11 + """ + if default is _sentinel: + return self.__dict__.pop(name) + else: + return self.__dict__.pop(name, default) + + def setdefault(self, name: str, default: t.Any = None) -> t.Any: + """Get the value of an attribute if it is present, otherwise + set and return a default value. Like :meth:`dict.setdefault`. + + :param name: Name of attribute to get. + :param default: Value to set and return if the attribute is not + present. + + .. versionadded:: 0.11 + """ + return self.__dict__.setdefault(name, default) + + def __contains__(self, item: str) -> bool: + return item in self.__dict__ + + def __iter__(self) -> t.Iterator[str]: + return iter(self.__dict__) + + def __repr__(self) -> str: + top = _app_ctx_stack.top + if top is not None: + return f"" + return object.__repr__(self) + + +def after_this_request(f: AfterRequestCallable) -> AfterRequestCallable: + """Executes a function after this request. This is useful to modify + response objects. The function is passed the response object and has + to return the same or a new one. + + Example:: + + @app.route('/') + def index(): + @after_this_request + def add_header(response): + response.headers['X-Foo'] = 'Parachute' + return response + return 'Hello World!' + + This is more useful if a function other than the view function wants to + modify a response. For instance think of a decorator that wants to add + some headers without converting the return value into a response object. + + .. versionadded:: 0.9 + """ + _request_ctx_stack.top._after_request_functions.append(f) + return f + + +def copy_current_request_context(f: t.Callable) -> t.Callable: + """A helper function that decorates a function to retain the current + request context. This is useful when working with greenlets. The moment + the function is decorated a copy of the request context is created and + then pushed when the function is called. The current session is also + included in the copied request context. + + Example:: + + import gevent + from flask import copy_current_request_context + + @app.route('/') + def index(): + @copy_current_request_context + def do_some_work(): + # do some work here, it can access flask.request or + # flask.session like you would otherwise in the view function. + ... + gevent.spawn(do_some_work) + return 'Regular response' + + .. versionadded:: 0.10 + """ + top = _request_ctx_stack.top + if top is None: + raise RuntimeError( + "This decorator can only be used at local scopes " + "when a request context is on the stack. For instance within " + "view functions." + ) + reqctx = top.copy() + + def wrapper(*args, **kwargs): + with reqctx: + return f(*args, **kwargs) + + return update_wrapper(wrapper, f) + + +def has_request_context() -> bool: + """If you have code that wants to test if a request context is there or + not this function can be used. For instance, you may want to take advantage + of request information if the request object is available, but fail + silently if it is unavailable. + + :: + + class User(db.Model): + + def __init__(self, username, remote_addr=None): + self.username = username + if remote_addr is None and has_request_context(): + remote_addr = request.remote_addr + self.remote_addr = remote_addr + + Alternatively you can also just test any of the context bound objects + (such as :class:`request` or :class:`g`) for truthness:: + + class User(db.Model): + + def __init__(self, username, remote_addr=None): + self.username = username + if remote_addr is None and request: + remote_addr = request.remote_addr + self.remote_addr = remote_addr + + .. versionadded:: 0.7 + """ + return _request_ctx_stack.top is not None + + +def has_app_context() -> bool: + """Works like :func:`has_request_context` but for the application + context. You can also just do a boolean check on the + :data:`current_app` object instead. + + .. versionadded:: 0.9 + """ + return _app_ctx_stack.top is not None + + +class AppContext: + """The application context binds an application object implicitly + to the current thread or greenlet, similar to how the + :class:`RequestContext` binds request information. The application + context is also implicitly created if a request context is created + but the application is not on top of the individual application + context. + """ + + def __init__(self, app: "Flask") -> None: + self.app = app + self.url_adapter = app.create_url_adapter(None) + self.g = app.app_ctx_globals_class() + + # Like request context, app contexts can be pushed multiple times + # but there a basic "refcount" is enough to track them. + self._refcnt = 0 + + def push(self) -> None: + """Binds the app context to the current context.""" + self._refcnt += 1 + _app_ctx_stack.push(self) + appcontext_pushed.send(self.app) + + def pop(self, exc: t.Optional[BaseException] = _sentinel) -> None: # type: ignore + """Pops the app context.""" + try: + self._refcnt -= 1 + if self._refcnt <= 0: + if exc is _sentinel: + exc = sys.exc_info()[1] + self.app.do_teardown_appcontext(exc) + finally: + rv = _app_ctx_stack.pop() + assert rv is self, f"Popped wrong app context. ({rv!r} instead of {self!r})" + appcontext_popped.send(self.app) + + def __enter__(self) -> "AppContext": + self.push() + return self + + def __exit__( + self, exc_type: type, exc_value: BaseException, tb: TracebackType + ) -> None: + self.pop(exc_value) + + +class RequestContext: + """The request context contains all request relevant information. It is + created at the beginning of the request and pushed to the + `_request_ctx_stack` and removed at the end of it. It will create the + URL adapter and request object for the WSGI environment provided. + + Do not attempt to use this class directly, instead use + :meth:`~flask.Flask.test_request_context` and + :meth:`~flask.Flask.request_context` to create this object. + + When the request context is popped, it will evaluate all the + functions registered on the application for teardown execution + (:meth:`~flask.Flask.teardown_request`). + + The request context is automatically popped at the end of the request + for you. In debug mode the request context is kept around if + exceptions happen so that interactive debuggers have a chance to + introspect the data. With 0.4 this can also be forced for requests + that did not fail and outside of ``DEBUG`` mode. By setting + ``'flask._preserve_context'`` to ``True`` on the WSGI environment the + context will not pop itself at the end of the request. This is used by + the :meth:`~flask.Flask.test_client` for example to implement the + deferred cleanup functionality. + + You might find this helpful for unittests where you need the + information from the context local around for a little longer. Make + sure to properly :meth:`~werkzeug.LocalStack.pop` the stack yourself in + that situation, otherwise your unittests will leak memory. + """ + + def __init__( + self, + app: "Flask", + environ: dict, + request: t.Optional["Request"] = None, + session: t.Optional["SessionMixin"] = None, + ) -> None: + self.app = app + if request is None: + request = app.request_class(environ) + self.request = request + self.url_adapter = None + try: + self.url_adapter = app.create_url_adapter(self.request) + except HTTPException as e: + self.request.routing_exception = e + self.flashes = None + self.session = session + + # Request contexts can be pushed multiple times and interleaved with + # other request contexts. Now only if the last level is popped we + # get rid of them. Additionally if an application context is missing + # one is created implicitly so for each level we add this information + self._implicit_app_ctx_stack: t.List[t.Optional["AppContext"]] = [] + + # indicator if the context was preserved. Next time another context + # is pushed the preserved context is popped. + self.preserved = False + + # remembers the exception for pop if there is one in case the context + # preservation kicks in. + self._preserved_exc = None + + # Functions that should be executed after the request on the response + # object. These will be called before the regular "after_request" + # functions. + self._after_request_functions: t.List[AfterRequestCallable] = [] + + @property + def g(self) -> AppContext: + return _app_ctx_stack.top.g + + @g.setter + def g(self, value: AppContext) -> None: + _app_ctx_stack.top.g = value + + def copy(self) -> "RequestContext": + """Creates a copy of this request context with the same request object. + This can be used to move a request context to a different greenlet. + Because the actual request object is the same this cannot be used to + move a request context to a different thread unless access to the + request object is locked. + + .. versionadded:: 0.10 + + .. versionchanged:: 1.1 + The current session object is used instead of reloading the original + data. This prevents `flask.session` pointing to an out-of-date object. + """ + return self.__class__( + self.app, + environ=self.request.environ, + request=self.request, + session=self.session, + ) + + def match_request(self) -> None: + """Can be overridden by a subclass to hook into the matching + of the request. + """ + try: + result = self.url_adapter.match(return_rule=True) # type: ignore + self.request.url_rule, self.request.view_args = result # type: ignore + except HTTPException as e: + self.request.routing_exception = e + + def push(self) -> None: + """Binds the request context to the current context.""" + # If an exception occurs in debug mode or if context preservation is + # activated under exception situations exactly one context stays + # on the stack. The rationale is that you want to access that + # information under debug situations. However if someone forgets to + # pop that context again we want to make sure that on the next push + # it's invalidated, otherwise we run at risk that something leaks + # memory. This is usually only a problem in test suite since this + # functionality is not active in production environments. + top = _request_ctx_stack.top + if top is not None and top.preserved: + top.pop(top._preserved_exc) + + # Before we push the request context we have to ensure that there + # is an application context. + app_ctx = _app_ctx_stack.top + if app_ctx is None or app_ctx.app != self.app: + app_ctx = self.app.app_context() + app_ctx.push() + self._implicit_app_ctx_stack.append(app_ctx) + else: + self._implicit_app_ctx_stack.append(None) + + _request_ctx_stack.push(self) + + # Open the session at the moment that the request context is available. + # This allows a custom open_session method to use the request context. + # Only open a new session if this is the first time the request was + # pushed, otherwise stream_with_context loses the session. + if self.session is None: + session_interface = self.app.session_interface + self.session = session_interface.open_session(self.app, self.request) + + if self.session is None: + self.session = session_interface.make_null_session(self.app) + + # Match the request URL after loading the session, so that the + # session is available in custom URL converters. + if self.url_adapter is not None: + self.match_request() + + def pop(self, exc: t.Optional[BaseException] = _sentinel) -> None: # type: ignore + """Pops the request context and unbinds it by doing that. This will + also trigger the execution of functions registered by the + :meth:`~flask.Flask.teardown_request` decorator. + + .. versionchanged:: 0.9 + Added the `exc` argument. + """ + app_ctx = self._implicit_app_ctx_stack.pop() + clear_request = False + + try: + if not self._implicit_app_ctx_stack: + self.preserved = False + self._preserved_exc = None + if exc is _sentinel: + exc = sys.exc_info()[1] + self.app.do_teardown_request(exc) + + request_close = getattr(self.request, "close", None) + if request_close is not None: + request_close() + clear_request = True + finally: + rv = _request_ctx_stack.pop() + + # get rid of circular dependencies at the end of the request + # so that we don't require the GC to be active. + if clear_request: + rv.request.environ["werkzeug.request"] = None + + # Get rid of the app as well if necessary. + if app_ctx is not None: + app_ctx.pop(exc) + + assert ( + rv is self + ), f"Popped wrong request context. ({rv!r} instead of {self!r})" + + def auto_pop(self, exc: t.Optional[BaseException]) -> None: + if self.request.environ.get("flask._preserve_context") or ( + exc is not None and self.app.preserve_context_on_exception + ): + self.preserved = True + self._preserved_exc = exc # type: ignore + else: + self.pop(exc) + + def __enter__(self) -> "RequestContext": + self.push() + return self + + def __exit__( + self, exc_type: type, exc_value: BaseException, tb: TracebackType + ) -> None: + # do not pop the request stack if we are in debug mode and an + # exception happened. This will allow the debugger to still + # access the request object in the interactive shell. Furthermore + # the context can be force kept alive for the test client. + # See flask.testing for how this works. + self.auto_pop(exc_value) + + def __repr__(self) -> str: + return ( + f"<{type(self).__name__} {self.request.url!r}" + f" [{self.request.method}] of {self.app.name}>" + ) diff --git a/.venv/lib/python3.6/site-packages/flask/debughelpers.py b/.venv/lib/python3.6/site-packages/flask/debughelpers.py new file mode 100644 index 0000000..212f7d7 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/flask/debughelpers.py @@ -0,0 +1,172 @@ +import os +import typing as t +from warnings import warn + +from .app import Flask +from .blueprints import Blueprint +from .globals import _request_ctx_stack + + +class UnexpectedUnicodeError(AssertionError, UnicodeError): + """Raised in places where we want some better error reporting for + unexpected unicode or binary data. + """ + + +class DebugFilesKeyError(KeyError, AssertionError): + """Raised from request.files during debugging. The idea is that it can + provide a better error message than just a generic KeyError/BadRequest. + """ + + def __init__(self, request, key): + form_matches = request.form.getlist(key) + buf = [ + f"You tried to access the file {key!r} in the request.files" + " dictionary but it does not exist. The mimetype for the" + f" request is {request.mimetype!r} instead of" + " 'multipart/form-data' which means that no file contents" + " were transmitted. To fix this error you should provide" + ' enctype="multipart/form-data" in your form.' + ] + if form_matches: + names = ", ".join(repr(x) for x in form_matches) + buf.append( + "\n\nThe browser instead transmitted some file names. " + f"This was submitted: {names}" + ) + self.msg = "".join(buf) + + def __str__(self): + return self.msg + + +class FormDataRoutingRedirect(AssertionError): + """This exception is raised by Flask in debug mode if it detects a + redirect caused by the routing system when the request method is not + GET, HEAD or OPTIONS. Reasoning: form data will be dropped. + """ + + def __init__(self, request): + exc = request.routing_exception + buf = [ + f"A request was sent to this URL ({request.url}) but a" + " redirect was issued automatically by the routing system" + f" to {exc.new_url!r}." + ] + + # In case just a slash was appended we can be extra helpful + if f"{request.base_url}/" == exc.new_url.split("?")[0]: + buf.append( + " The URL was defined with a trailing slash so Flask" + " will automatically redirect to the URL with the" + " trailing slash if it was accessed without one." + ) + + buf.append( + " Make sure to directly send your" + f" {request.method}-request to this URL since we can't make" + " browsers or HTTP clients redirect with form data reliably" + " or without user interaction." + ) + buf.append("\n\nNote: this exception is only raised in debug mode") + AssertionError.__init__(self, "".join(buf).encode("utf-8")) + + +def attach_enctype_error_multidict(request): + """Since Flask 0.8 we're monkeypatching the files object in case a + request is detected that does not use multipart form data but the files + object is accessed. + """ + oldcls = request.files.__class__ + + class newcls(oldcls): + def __getitem__(self, key): + try: + return oldcls.__getitem__(self, key) + except KeyError as e: + if key not in request.form: + raise + + raise DebugFilesKeyError(request, key) from e + + newcls.__name__ = oldcls.__name__ + newcls.__module__ = oldcls.__module__ + request.files.__class__ = newcls + + +def _dump_loader_info(loader) -> t.Generator: + yield f"class: {type(loader).__module__}.{type(loader).__name__}" + for key, value in sorted(loader.__dict__.items()): + if key.startswith("_"): + continue + if isinstance(value, (tuple, list)): + if not all(isinstance(x, str) for x in value): + continue + yield f"{key}:" + for item in value: + yield f" - {item}" + continue + elif not isinstance(value, (str, int, float, bool)): + continue + yield f"{key}: {value!r}" + + +def explain_template_loading_attempts(app: Flask, template, attempts) -> None: + """This should help developers understand what failed""" + info = [f"Locating template {template!r}:"] + total_found = 0 + blueprint = None + reqctx = _request_ctx_stack.top + if reqctx is not None and reqctx.request.blueprint is not None: + blueprint = reqctx.request.blueprint + + for idx, (loader, srcobj, triple) in enumerate(attempts): + if isinstance(srcobj, Flask): + src_info = f"application {srcobj.import_name!r}" + elif isinstance(srcobj, Blueprint): + src_info = f"blueprint {srcobj.name!r} ({srcobj.import_name})" + else: + src_info = repr(srcobj) + + info.append(f"{idx + 1:5}: trying loader of {src_info}") + + for line in _dump_loader_info(loader): + info.append(f" {line}") + + if triple is None: + detail = "no match" + else: + detail = f"found ({triple[1] or ''!r})" + total_found += 1 + info.append(f" -> {detail}") + + seems_fishy = False + if total_found == 0: + info.append("Error: the template could not be found.") + seems_fishy = True + elif total_found > 1: + info.append("Warning: multiple loaders returned a match for the template.") + seems_fishy = True + + if blueprint is not None and seems_fishy: + info.append( + " The template was looked up from an endpoint that belongs" + f" to the blueprint {blueprint!r}." + ) + info.append(" Maybe you did not place a template in the right folder?") + info.append(" See https://flask.palletsprojects.com/blueprints/#templates") + + app.logger.info("\n".join(info)) + + +def explain_ignored_app_run() -> None: + if os.environ.get("WERKZEUG_RUN_MAIN") != "true": + warn( + Warning( + "Silently ignoring app.run() because the application is" + " run from the flask command line executable. Consider" + ' putting app.run() behind an if __name__ == "__main__"' + " guard to silence this warning." + ), + stacklevel=3, + ) diff --git a/.venv/lib/python3.6/site-packages/flask/globals.py b/.venv/lib/python3.6/site-packages/flask/globals.py new file mode 100644 index 0000000..6d91c75 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/flask/globals.py @@ -0,0 +1,59 @@ +import typing as t +from functools import partial + +from werkzeug.local import LocalProxy +from werkzeug.local import LocalStack + +if t.TYPE_CHECKING: + from .app import Flask + from .ctx import _AppCtxGlobals + from .sessions import SessionMixin + from .wrappers import Request + +_request_ctx_err_msg = """\ +Working outside of request context. + +This typically means that you attempted to use functionality that needed +an active HTTP request. Consult the documentation on testing for +information about how to avoid this problem.\ +""" +_app_ctx_err_msg = """\ +Working outside of application context. + +This typically means that you attempted to use functionality that needed +to interface with the current application object in some way. To solve +this, set up an application context with app.app_context(). See the +documentation for more information.\ +""" + + +def _lookup_req_object(name): + top = _request_ctx_stack.top + if top is None: + raise RuntimeError(_request_ctx_err_msg) + return getattr(top, name) + + +def _lookup_app_object(name): + top = _app_ctx_stack.top + if top is None: + raise RuntimeError(_app_ctx_err_msg) + return getattr(top, name) + + +def _find_app(): + top = _app_ctx_stack.top + if top is None: + raise RuntimeError(_app_ctx_err_msg) + return top.app + + +# context locals +_request_ctx_stack = LocalStack() +_app_ctx_stack = LocalStack() +current_app: "Flask" = LocalProxy(_find_app) # type: ignore +request: "Request" = LocalProxy(partial(_lookup_req_object, "request")) # type: ignore +session: "SessionMixin" = LocalProxy( # type: ignore + partial(_lookup_req_object, "session") +) +g: "_AppCtxGlobals" = LocalProxy(partial(_lookup_app_object, "g")) # type: ignore diff --git a/.venv/lib/python3.6/site-packages/flask/helpers.py b/.venv/lib/python3.6/site-packages/flask/helpers.py new file mode 100644 index 0000000..7b8b087 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/flask/helpers.py @@ -0,0 +1,836 @@ +import os +import pkgutil +import socket +import sys +import typing as t +import warnings +from datetime import datetime +from datetime import timedelta +from functools import lru_cache +from functools import update_wrapper +from threading import RLock + +import werkzeug.utils +from werkzeug.exceptions import NotFound +from werkzeug.routing import BuildError +from werkzeug.urls import url_quote + +from .globals import _app_ctx_stack +from .globals import _request_ctx_stack +from .globals import current_app +from .globals import request +from .globals import session +from .signals import message_flashed + +if t.TYPE_CHECKING: + from .wrappers import Response + + +def get_env() -> str: + """Get the environment the app is running in, indicated by the + :envvar:`FLASK_ENV` environment variable. The default is + ``'production'``. + """ + return os.environ.get("FLASK_ENV") or "production" + + +def get_debug_flag() -> bool: + """Get whether debug mode should be enabled for the app, indicated + by the :envvar:`FLASK_DEBUG` environment variable. The default is + ``True`` if :func:`.get_env` returns ``'development'``, or ``False`` + otherwise. + """ + val = os.environ.get("FLASK_DEBUG") + + if not val: + return get_env() == "development" + + return val.lower() not in ("0", "false", "no") + + +def get_load_dotenv(default: bool = True) -> bool: + """Get whether the user has disabled loading dotenv files by setting + :envvar:`FLASK_SKIP_DOTENV`. The default is ``True``, load the + files. + + :param default: What to return if the env var isn't set. + """ + val = os.environ.get("FLASK_SKIP_DOTENV") + + if not val: + return default + + return val.lower() in ("0", "false", "no") + + +def stream_with_context( + generator_or_function: t.Union[ + t.Iterator[t.AnyStr], t.Callable[..., t.Iterator[t.AnyStr]] + ] +) -> t.Iterator[t.AnyStr]: + """Request contexts disappear when the response is started on the server. + This is done for efficiency reasons and to make it less likely to encounter + memory leaks with badly written WSGI middlewares. The downside is that if + you are using streamed responses, the generator cannot access request bound + information any more. + + This function however can help you keep the context around for longer:: + + from flask import stream_with_context, request, Response + + @app.route('/stream') + def streamed_response(): + @stream_with_context + def generate(): + yield 'Hello ' + yield request.args['name'] + yield '!' + return Response(generate()) + + Alternatively it can also be used around a specific generator:: + + from flask import stream_with_context, request, Response + + @app.route('/stream') + def streamed_response(): + def generate(): + yield 'Hello ' + yield request.args['name'] + yield '!' + return Response(stream_with_context(generate())) + + .. versionadded:: 0.9 + """ + try: + gen = iter(generator_or_function) # type: ignore + except TypeError: + + def decorator(*args: t.Any, **kwargs: t.Any) -> t.Any: + gen = generator_or_function(*args, **kwargs) # type: ignore + return stream_with_context(gen) + + return update_wrapper(decorator, generator_or_function) # type: ignore + + def generator() -> t.Generator: + ctx = _request_ctx_stack.top + if ctx is None: + raise RuntimeError( + "Attempted to stream with context but " + "there was no context in the first place to keep around." + ) + with ctx: + # Dummy sentinel. Has to be inside the context block or we're + # not actually keeping the context around. + yield None + + # The try/finally is here so that if someone passes a WSGI level + # iterator in we're still running the cleanup logic. Generators + # don't need that because they are closed on their destruction + # automatically. + try: + yield from gen + finally: + if hasattr(gen, "close"): + gen.close() # type: ignore + + # The trick is to start the generator. Then the code execution runs until + # the first dummy None is yielded at which point the context was already + # pushed. This item is discarded. Then when the iteration continues the + # real generator is executed. + wrapped_g = generator() + next(wrapped_g) + return wrapped_g + + +def make_response(*args: t.Any) -> "Response": + """Sometimes it is necessary to set additional headers in a view. Because + views do not have to return response objects but can return a value that + is converted into a response object by Flask itself, it becomes tricky to + add headers to it. This function can be called instead of using a return + and you will get a response object which you can use to attach headers. + + If view looked like this and you want to add a new header:: + + def index(): + return render_template('index.html', foo=42) + + You can now do something like this:: + + def index(): + response = make_response(render_template('index.html', foo=42)) + response.headers['X-Parachutes'] = 'parachutes are cool' + return response + + This function accepts the very same arguments you can return from a + view function. This for example creates a response with a 404 error + code:: + + response = make_response(render_template('not_found.html'), 404) + + The other use case of this function is to force the return value of a + view function into a response which is helpful with view + decorators:: + + response = make_response(view_function()) + response.headers['X-Parachutes'] = 'parachutes are cool' + + Internally this function does the following things: + + - if no arguments are passed, it creates a new response argument + - if one argument is passed, :meth:`flask.Flask.make_response` + is invoked with it. + - if more than one argument is passed, the arguments are passed + to the :meth:`flask.Flask.make_response` function as tuple. + + .. versionadded:: 0.6 + """ + if not args: + return current_app.response_class() + if len(args) == 1: + args = args[0] + return current_app.make_response(args) + + +def url_for(endpoint: str, **values: t.Any) -> str: + """Generates a URL to the given endpoint with the method provided. + + Variable arguments that are unknown to the target endpoint are appended + to the generated URL as query arguments. If the value of a query argument + is ``None``, the whole pair is skipped. In case blueprints are active + you can shortcut references to the same blueprint by prefixing the + local endpoint with a dot (``.``). + + This will reference the index function local to the current blueprint:: + + url_for('.index') + + See :ref:`url-building`. + + Configuration values ``APPLICATION_ROOT`` and ``SERVER_NAME`` are only used when + generating URLs outside of a request context. + + To integrate applications, :class:`Flask` has a hook to intercept URL build + errors through :attr:`Flask.url_build_error_handlers`. The `url_for` + function results in a :exc:`~werkzeug.routing.BuildError` when the current + app does not have a URL for the given endpoint and values. When it does, the + :data:`~flask.current_app` calls its :attr:`~Flask.url_build_error_handlers` if + it is not ``None``, which can return a string to use as the result of + `url_for` (instead of `url_for`'s default to raise the + :exc:`~werkzeug.routing.BuildError` exception) or re-raise the exception. + An example:: + + def external_url_handler(error, endpoint, values): + "Looks up an external URL when `url_for` cannot build a URL." + # This is an example of hooking the build_error_handler. + # Here, lookup_url is some utility function you've built + # which looks up the endpoint in some external URL registry. + url = lookup_url(endpoint, **values) + if url is None: + # External lookup did not have a URL. + # Re-raise the BuildError, in context of original traceback. + exc_type, exc_value, tb = sys.exc_info() + if exc_value is error: + raise exc_type(exc_value).with_traceback(tb) + else: + raise error + # url_for will use this result, instead of raising BuildError. + return url + + app.url_build_error_handlers.append(external_url_handler) + + Here, `error` is the instance of :exc:`~werkzeug.routing.BuildError`, and + `endpoint` and `values` are the arguments passed into `url_for`. Note + that this is for building URLs outside the current application, and not for + handling 404 NotFound errors. + + .. versionadded:: 0.10 + The `_scheme` parameter was added. + + .. versionadded:: 0.9 + The `_anchor` and `_method` parameters were added. + + .. versionadded:: 0.9 + Calls :meth:`Flask.handle_build_error` on + :exc:`~werkzeug.routing.BuildError`. + + :param endpoint: the endpoint of the URL (name of the function) + :param values: the variable arguments of the URL rule + :param _external: if set to ``True``, an absolute URL is generated. Server + address can be changed via ``SERVER_NAME`` configuration variable which + falls back to the `Host` header, then to the IP and port of the request. + :param _scheme: a string specifying the desired URL scheme. The `_external` + parameter must be set to ``True`` or a :exc:`ValueError` is raised. The default + behavior uses the same scheme as the current request, or + :data:`PREFERRED_URL_SCHEME` if no request context is available. + This also can be set to an empty string to build protocol-relative + URLs. + :param _anchor: if provided this is added as anchor to the URL. + :param _method: if provided this explicitly specifies an HTTP method. + """ + appctx = _app_ctx_stack.top + reqctx = _request_ctx_stack.top + + if appctx is None: + raise RuntimeError( + "Attempted to generate a URL without the application context being" + " pushed. This has to be executed when application context is" + " available." + ) + + # If request specific information is available we have some extra + # features that support "relative" URLs. + if reqctx is not None: + url_adapter = reqctx.url_adapter + blueprint_name = request.blueprint + + if endpoint[:1] == ".": + if blueprint_name is not None: + endpoint = f"{blueprint_name}{endpoint}" + else: + endpoint = endpoint[1:] + + external = values.pop("_external", False) + + # Otherwise go with the url adapter from the appctx and make + # the URLs external by default. + else: + url_adapter = appctx.url_adapter + + if url_adapter is None: + raise RuntimeError( + "Application was not able to create a URL adapter for request" + " independent URL generation. You might be able to fix this by" + " setting the SERVER_NAME config variable." + ) + + external = values.pop("_external", True) + + anchor = values.pop("_anchor", None) + method = values.pop("_method", None) + scheme = values.pop("_scheme", None) + appctx.app.inject_url_defaults(endpoint, values) + + # This is not the best way to deal with this but currently the + # underlying Werkzeug router does not support overriding the scheme on + # a per build call basis. + old_scheme = None + if scheme is not None: + if not external: + raise ValueError("When specifying _scheme, _external must be True") + old_scheme = url_adapter.url_scheme + url_adapter.url_scheme = scheme + + try: + try: + rv = url_adapter.build( + endpoint, values, method=method, force_external=external + ) + finally: + if old_scheme is not None: + url_adapter.url_scheme = old_scheme + except BuildError as error: + # We need to inject the values again so that the app callback can + # deal with that sort of stuff. + values["_external"] = external + values["_anchor"] = anchor + values["_method"] = method + values["_scheme"] = scheme + return appctx.app.handle_url_build_error(error, endpoint, values) + + if anchor is not None: + rv += f"#{url_quote(anchor)}" + return rv + + +def get_template_attribute(template_name: str, attribute: str) -> t.Any: + """Loads a macro (or variable) a template exports. This can be used to + invoke a macro from within Python code. If you for example have a + template named :file:`_cider.html` with the following contents: + + .. sourcecode:: html+jinja + + {% macro hello(name) %}Hello {{ name }}!{% endmacro %} + + You can access this from Python code like this:: + + hello = get_template_attribute('_cider.html', 'hello') + return hello('World') + + .. versionadded:: 0.2 + + :param template_name: the name of the template + :param attribute: the name of the variable of macro to access + """ + return getattr(current_app.jinja_env.get_template(template_name).module, attribute) + + +def flash(message: str, category: str = "message") -> None: + """Flashes a message to the next request. In order to remove the + flashed message from the session and to display it to the user, + the template has to call :func:`get_flashed_messages`. + + .. versionchanged:: 0.3 + `category` parameter added. + + :param message: the message to be flashed. + :param category: the category for the message. The following values + are recommended: ``'message'`` for any kind of message, + ``'error'`` for errors, ``'info'`` for information + messages and ``'warning'`` for warnings. However any + kind of string can be used as category. + """ + # Original implementation: + # + # session.setdefault('_flashes', []).append((category, message)) + # + # This assumed that changes made to mutable structures in the session are + # always in sync with the session object, which is not true for session + # implementations that use external storage for keeping their keys/values. + flashes = session.get("_flashes", []) + flashes.append((category, message)) + session["_flashes"] = flashes + message_flashed.send( + current_app._get_current_object(), # type: ignore + message=message, + category=category, + ) + + +def get_flashed_messages( + with_categories: bool = False, category_filter: t.Iterable[str] = () +) -> t.Union[t.List[str], t.List[t.Tuple[str, str]]]: + """Pulls all flashed messages from the session and returns them. + Further calls in the same request to the function will return + the same messages. By default just the messages are returned, + but when `with_categories` is set to ``True``, the return value will + be a list of tuples in the form ``(category, message)`` instead. + + Filter the flashed messages to one or more categories by providing those + categories in `category_filter`. This allows rendering categories in + separate html blocks. The `with_categories` and `category_filter` + arguments are distinct: + + * `with_categories` controls whether categories are returned with message + text (``True`` gives a tuple, where ``False`` gives just the message text). + * `category_filter` filters the messages down to only those matching the + provided categories. + + See :doc:`/patterns/flashing` for examples. + + .. versionchanged:: 0.3 + `with_categories` parameter added. + + .. versionchanged:: 0.9 + `category_filter` parameter added. + + :param with_categories: set to ``True`` to also receive categories. + :param category_filter: filter of categories to limit return values. Only + categories in the list will be returned. + """ + flashes = _request_ctx_stack.top.flashes + if flashes is None: + _request_ctx_stack.top.flashes = flashes = ( + session.pop("_flashes") if "_flashes" in session else [] + ) + if category_filter: + flashes = list(filter(lambda f: f[0] in category_filter, flashes)) + if not with_categories: + return [x[1] for x in flashes] + return flashes + + +def _prepare_send_file_kwargs( + download_name: t.Optional[str] = None, + attachment_filename: t.Optional[str] = None, + etag: t.Optional[t.Union[bool, str]] = None, + add_etags: t.Optional[t.Union[bool]] = None, + max_age: t.Optional[ + t.Union[int, t.Callable[[t.Optional[str]], t.Optional[int]]] + ] = None, + cache_timeout: t.Optional[int] = None, + **kwargs: t.Any, +) -> t.Dict[str, t.Any]: + if attachment_filename is not None: + warnings.warn( + "The 'attachment_filename' parameter has been renamed to" + " 'download_name'. The old name will be removed in Flask" + " 2.1.", + DeprecationWarning, + stacklevel=3, + ) + download_name = attachment_filename + + if cache_timeout is not None: + warnings.warn( + "The 'cache_timeout' parameter has been renamed to" + " 'max_age'. The old name will be removed in Flask 2.1.", + DeprecationWarning, + stacklevel=3, + ) + max_age = cache_timeout + + if add_etags is not None: + warnings.warn( + "The 'add_etags' parameter has been renamed to 'etag'. The" + " old name will be removed in Flask 2.1.", + DeprecationWarning, + stacklevel=3, + ) + etag = add_etags + + if max_age is None: + max_age = current_app.get_send_file_max_age + + kwargs.update( + environ=request.environ, + download_name=download_name, + etag=etag, + max_age=max_age, + use_x_sendfile=current_app.use_x_sendfile, + response_class=current_app.response_class, + _root_path=current_app.root_path, # type: ignore + ) + return kwargs + + +def send_file( + path_or_file: t.Union[os.PathLike, str, t.BinaryIO], + mimetype: t.Optional[str] = None, + as_attachment: bool = False, + download_name: t.Optional[str] = None, + attachment_filename: t.Optional[str] = None, + conditional: bool = True, + etag: t.Union[bool, str] = True, + add_etags: t.Optional[bool] = None, + last_modified: t.Optional[t.Union[datetime, int, float]] = None, + max_age: t.Optional[ + t.Union[int, t.Callable[[t.Optional[str]], t.Optional[int]]] + ] = None, + cache_timeout: t.Optional[int] = None, +): + """Send the contents of a file to the client. + + The first argument can be a file path or a file-like object. Paths + are preferred in most cases because Werkzeug can manage the file and + get extra information from the path. Passing a file-like object + requires that the file is opened in binary mode, and is mostly + useful when building a file in memory with :class:`io.BytesIO`. + + Never pass file paths provided by a user. The path is assumed to be + trusted, so a user could craft a path to access a file you didn't + intend. Use :func:`send_from_directory` to safely serve + user-requested paths from within a directory. + + If the WSGI server sets a ``file_wrapper`` in ``environ``, it is + used, otherwise Werkzeug's built-in wrapper is used. Alternatively, + if the HTTP server supports ``X-Sendfile``, configuring Flask with + ``USE_X_SENDFILE = True`` will tell the server to send the given + path, which is much more efficient than reading it in Python. + + :param path_or_file: The path to the file to send, relative to the + current working directory if a relative path is given. + Alternatively, a file-like object opened in binary mode. Make + sure the file pointer is seeked to the start of the data. + :param mimetype: The MIME type to send for the file. If not + provided, it will try to detect it from the file name. + :param as_attachment: Indicate to a browser that it should offer to + save the file instead of displaying it. + :param download_name: The default name browsers will use when saving + the file. Defaults to the passed file name. + :param conditional: Enable conditional and range responses based on + request headers. Requires passing a file path and ``environ``. + :param etag: Calculate an ETag for the file, which requires passing + a file path. Can also be a string to use instead. + :param last_modified: The last modified time to send for the file, + in seconds. If not provided, it will try to detect it from the + file path. + :param max_age: How long the client should cache the file, in + seconds. If set, ``Cache-Control`` will be ``public``, otherwise + it will be ``no-cache`` to prefer conditional caching. + + .. versionchanged:: 2.0 + ``download_name`` replaces the ``attachment_filename`` + parameter. If ``as_attachment=False``, it is passed with + ``Content-Disposition: inline`` instead. + + .. versionchanged:: 2.0 + ``max_age`` replaces the ``cache_timeout`` parameter. + ``conditional`` is enabled and ``max_age`` is not set by + default. + + .. versionchanged:: 2.0 + ``etag`` replaces the ``add_etags`` parameter. It can be a + string to use instead of generating one. + + .. versionchanged:: 2.0 + Passing a file-like object that inherits from + :class:`~io.TextIOBase` will raise a :exc:`ValueError` rather + than sending an empty file. + + .. versionadded:: 2.0 + Moved the implementation to Werkzeug. This is now a wrapper to + pass some Flask-specific arguments. + + .. versionchanged:: 1.1 + ``filename`` may be a :class:`~os.PathLike` object. + + .. versionchanged:: 1.1 + Passing a :class:`~io.BytesIO` object supports range requests. + + .. versionchanged:: 1.0.3 + Filenames are encoded with ASCII instead of Latin-1 for broader + compatibility with WSGI servers. + + .. versionchanged:: 1.0 + UTF-8 filenames as specified in :rfc:`2231` are supported. + + .. versionchanged:: 0.12 + The filename is no longer automatically inferred from file + objects. If you want to use automatic MIME and etag support, + pass a filename via ``filename_or_fp`` or + ``attachment_filename``. + + .. versionchanged:: 0.12 + ``attachment_filename`` is preferred over ``filename`` for MIME + detection. + + .. versionchanged:: 0.9 + ``cache_timeout`` defaults to + :meth:`Flask.get_send_file_max_age`. + + .. versionchanged:: 0.7 + MIME guessing and etag support for file-like objects was + deprecated because it was unreliable. Pass a filename if you are + able to, otherwise attach an etag yourself. + + .. versionchanged:: 0.5 + The ``add_etags``, ``cache_timeout`` and ``conditional`` + parameters were added. The default behavior is to add etags. + + .. versionadded:: 0.2 + """ + return werkzeug.utils.send_file( + **_prepare_send_file_kwargs( + path_or_file=path_or_file, + environ=request.environ, + mimetype=mimetype, + as_attachment=as_attachment, + download_name=download_name, + attachment_filename=attachment_filename, + conditional=conditional, + etag=etag, + add_etags=add_etags, + last_modified=last_modified, + max_age=max_age, + cache_timeout=cache_timeout, + ) + ) + + +def safe_join(directory: str, *pathnames: str) -> str: + """Safely join zero or more untrusted path components to a base + directory to avoid escaping the base directory. + + :param directory: The trusted base directory. + :param pathnames: The untrusted path components relative to the + base directory. + :return: A safe path, otherwise ``None``. + """ + warnings.warn( + "'flask.helpers.safe_join' is deprecated and will be removed in" + " Flask 2.1. Use 'werkzeug.utils.safe_join' instead.", + DeprecationWarning, + stacklevel=2, + ) + path = werkzeug.utils.safe_join(directory, *pathnames) + + if path is None: + raise NotFound() + + return path + + +def send_from_directory( + directory: t.Union[os.PathLike, str], + path: t.Union[os.PathLike, str], + filename: t.Optional[str] = None, + **kwargs: t.Any, +) -> "Response": + """Send a file from within a directory using :func:`send_file`. + + .. code-block:: python + + @app.route("/uploads/") + def download_file(name): + return send_from_directory( + app.config['UPLOAD_FOLDER'], name, as_attachment=True + ) + + This is a secure way to serve files from a folder, such as static + files or uploads. Uses :func:`~werkzeug.security.safe_join` to + ensure the path coming from the client is not maliciously crafted to + point outside the specified directory. + + If the final path does not point to an existing regular file, + raises a 404 :exc:`~werkzeug.exceptions.NotFound` error. + + :param directory: The directory that ``path`` must be located under. + :param path: The path to the file to send, relative to + ``directory``. + :param kwargs: Arguments to pass to :func:`send_file`. + + .. versionchanged:: 2.0 + ``path`` replaces the ``filename`` parameter. + + .. versionadded:: 2.0 + Moved the implementation to Werkzeug. This is now a wrapper to + pass some Flask-specific arguments. + + .. versionadded:: 0.5 + """ + if filename is not None: + warnings.warn( + "The 'filename' parameter has been renamed to 'path'. The" + " old name will be removed in Flask 2.1.", + DeprecationWarning, + stacklevel=2, + ) + path = filename + + return werkzeug.utils.send_from_directory( # type: ignore + directory, path, **_prepare_send_file_kwargs(**kwargs) + ) + + +def get_root_path(import_name: str) -> str: + """Find the root path of a package, or the path that contains a + module. If it cannot be found, returns the current working + directory. + + Not to be confused with the value returned by :func:`find_package`. + + :meta private: + """ + # Module already imported and has a file attribute. Use that first. + mod = sys.modules.get(import_name) + + if mod is not None and hasattr(mod, "__file__"): + return os.path.dirname(os.path.abspath(mod.__file__)) + + # Next attempt: check the loader. + loader = pkgutil.get_loader(import_name) + + # Loader does not exist or we're referring to an unloaded main + # module or a main module without path (interactive sessions), go + # with the current working directory. + if loader is None or import_name == "__main__": + return os.getcwd() + + if hasattr(loader, "get_filename"): + filepath = loader.get_filename(import_name) # type: ignore + else: + # Fall back to imports. + __import__(import_name) + mod = sys.modules[import_name] + filepath = getattr(mod, "__file__", None) + + # If we don't have a file path it might be because it is a + # namespace package. In this case pick the root path from the + # first module that is contained in the package. + if filepath is None: + raise RuntimeError( + "No root path can be found for the provided module" + f" {import_name!r}. This can happen because the module" + " came from an import hook that does not provide file" + " name information or because it's a namespace package." + " In this case the root path needs to be explicitly" + " provided." + ) + + # filepath is import_name.py for a module, or __init__.py for a package. + return os.path.dirname(os.path.abspath(filepath)) + + +class locked_cached_property(werkzeug.utils.cached_property): + """A :func:`property` that is only evaluated once. Like + :class:`werkzeug.utils.cached_property` except access uses a lock + for thread safety. + + .. versionchanged:: 2.0 + Inherits from Werkzeug's ``cached_property`` (and ``property``). + """ + + def __init__( + self, + fget: t.Callable[[t.Any], t.Any], + name: t.Optional[str] = None, + doc: t.Optional[str] = None, + ) -> None: + super().__init__(fget, name=name, doc=doc) + self.lock = RLock() + + def __get__(self, obj: object, type: type = None) -> t.Any: # type: ignore + if obj is None: + return self + + with self.lock: + return super().__get__(obj, type=type) + + def __set__(self, obj: object, value: t.Any) -> None: + with self.lock: + super().__set__(obj, value) + + def __delete__(self, obj: object) -> None: + with self.lock: + super().__delete__(obj) + + +def total_seconds(td: timedelta) -> int: + """Returns the total seconds from a timedelta object. + + :param timedelta td: the timedelta to be converted in seconds + + :returns: number of seconds + :rtype: int + + .. deprecated:: 2.0 + Will be removed in Flask 2.1. Use + :meth:`timedelta.total_seconds` instead. + """ + warnings.warn( + "'total_seconds' is deprecated and will be removed in Flask" + " 2.1. Use 'timedelta.total_seconds' instead.", + DeprecationWarning, + stacklevel=2, + ) + return td.days * 60 * 60 * 24 + td.seconds + + +def is_ip(value: str) -> bool: + """Determine if the given string is an IP address. + + :param value: value to check + :type value: str + + :return: True if string is an IP address + :rtype: bool + """ + for family in (socket.AF_INET, socket.AF_INET6): + try: + socket.inet_pton(family, value) + except OSError: + pass + else: + return True + + return False + + +@lru_cache(maxsize=None) +def _split_blueprint_path(name: str) -> t.List[str]: + out: t.List[str] = [name] + + if "." in name: + out.extend(_split_blueprint_path(name.rpartition(".")[0])) + + return out diff --git a/.venv/lib/python3.6/site-packages/flask/json/__init__.py b/.venv/lib/python3.6/site-packages/flask/json/__init__.py new file mode 100644 index 0000000..10d5123 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/flask/json/__init__.py @@ -0,0 +1,357 @@ +import decimal +import io +import json as _json +import typing as t +import uuid +import warnings +from datetime import date + +from jinja2.utils import htmlsafe_json_dumps as _jinja_htmlsafe_dumps +from werkzeug.http import http_date + +from ..globals import current_app +from ..globals import request + +if t.TYPE_CHECKING: + from ..app import Flask + from ..wrappers import Response + +try: + import dataclasses +except ImportError: + # Python < 3.7 + dataclasses = None # type: ignore + + +class JSONEncoder(_json.JSONEncoder): + """The default JSON encoder. Handles extra types compared to the + built-in :class:`json.JSONEncoder`. + + - :class:`datetime.datetime` and :class:`datetime.date` are + serialized to :rfc:`822` strings. This is the same as the HTTP + date format. + - :class:`uuid.UUID` is serialized to a string. + - :class:`dataclasses.dataclass` is passed to + :func:`dataclasses.asdict`. + - :class:`~markupsafe.Markup` (or any object with a ``__html__`` + method) will call the ``__html__`` method to get a string. + + Assign a subclass of this to :attr:`flask.Flask.json_encoder` or + :attr:`flask.Blueprint.json_encoder` to override the default. + """ + + def default(self, o: t.Any) -> t.Any: + """Convert ``o`` to a JSON serializable type. See + :meth:`json.JSONEncoder.default`. Python does not support + overriding how basic types like ``str`` or ``list`` are + serialized, they are handled before this method. + """ + if isinstance(o, date): + return http_date(o) + if isinstance(o, (decimal.Decimal, uuid.UUID)): + return str(o) + if dataclasses and dataclasses.is_dataclass(o): + return dataclasses.asdict(o) + if hasattr(o, "__html__"): + return str(o.__html__()) + return super().default(o) + + +class JSONDecoder(_json.JSONDecoder): + """The default JSON decoder. + + This does not change any behavior from the built-in + :class:`json.JSONDecoder`. + + Assign a subclass of this to :attr:`flask.Flask.json_decoder` or + :attr:`flask.Blueprint.json_decoder` to override the default. + """ + + +def _dump_arg_defaults( + kwargs: t.Dict[str, t.Any], app: t.Optional["Flask"] = None +) -> None: + """Inject default arguments for dump functions.""" + if app is None: + app = current_app + + if app: + cls = app.json_encoder + bp = app.blueprints.get(request.blueprint) if request else None # type: ignore + if bp is not None and bp.json_encoder is not None: + cls = bp.json_encoder + + kwargs.setdefault("cls", cls) + kwargs.setdefault("ensure_ascii", app.config["JSON_AS_ASCII"]) + kwargs.setdefault("sort_keys", app.config["JSON_SORT_KEYS"]) + else: + kwargs.setdefault("sort_keys", True) + kwargs.setdefault("cls", JSONEncoder) + + +def _load_arg_defaults( + kwargs: t.Dict[str, t.Any], app: t.Optional["Flask"] = None +) -> None: + """Inject default arguments for load functions.""" + if app is None: + app = current_app + + if app: + cls = app.json_decoder + bp = app.blueprints.get(request.blueprint) if request else None # type: ignore + if bp is not None and bp.json_decoder is not None: + cls = bp.json_decoder + + kwargs.setdefault("cls", cls) + else: + kwargs.setdefault("cls", JSONDecoder) + + +def dumps(obj: t.Any, app: t.Optional["Flask"] = None, **kwargs: t.Any) -> str: + """Serialize an object to a string of JSON. + + Takes the same arguments as the built-in :func:`json.dumps`, with + some defaults from application configuration. + + :param obj: Object to serialize to JSON. + :param app: Use this app's config instead of the active app context + or defaults. + :param kwargs: Extra arguments passed to :func:`json.dumps`. + + .. versionchanged:: 2.0.2 + :class:`decimal.Decimal` is supported by converting to a string. + + .. versionchanged:: 2.0 + ``encoding`` is deprecated and will be removed in Flask 2.1. + + .. versionchanged:: 1.0.3 + ``app`` can be passed directly, rather than requiring an app + context for configuration. + """ + _dump_arg_defaults(kwargs, app=app) + encoding = kwargs.pop("encoding", None) + rv = _json.dumps(obj, **kwargs) + + if encoding is not None: + warnings.warn( + "'encoding' is deprecated and will be removed in Flask 2.1.", + DeprecationWarning, + stacklevel=2, + ) + + if isinstance(rv, str): + return rv.encode(encoding) # type: ignore + + return rv + + +def dump( + obj: t.Any, fp: t.IO[str], app: t.Optional["Flask"] = None, **kwargs: t.Any +) -> None: + """Serialize an object to JSON written to a file object. + + Takes the same arguments as the built-in :func:`json.dump`, with + some defaults from application configuration. + + :param obj: Object to serialize to JSON. + :param fp: File object to write JSON to. + :param app: Use this app's config instead of the active app context + or defaults. + :param kwargs: Extra arguments passed to :func:`json.dump`. + + .. versionchanged:: 2.0 + Writing to a binary file, and the ``encoding`` argument, is + deprecated and will be removed in Flask 2.1. + """ + _dump_arg_defaults(kwargs, app=app) + encoding = kwargs.pop("encoding", None) + show_warning = encoding is not None + + try: + fp.write("") + except TypeError: + show_warning = True + fp = io.TextIOWrapper(fp, encoding or "utf-8") # type: ignore + + if show_warning: + warnings.warn( + "Writing to a binary file, and the 'encoding' argument, is" + " deprecated and will be removed in Flask 2.1.", + DeprecationWarning, + stacklevel=2, + ) + + _json.dump(obj, fp, **kwargs) + + +def loads(s: str, app: t.Optional["Flask"] = None, **kwargs: t.Any) -> t.Any: + """Deserialize an object from a string of JSON. + + Takes the same arguments as the built-in :func:`json.loads`, with + some defaults from application configuration. + + :param s: JSON string to deserialize. + :param app: Use this app's config instead of the active app context + or defaults. + :param kwargs: Extra arguments passed to :func:`json.loads`. + + .. versionchanged:: 2.0 + ``encoding`` is deprecated and will be removed in Flask 2.1. The + data must be a string or UTF-8 bytes. + + .. versionchanged:: 1.0.3 + ``app`` can be passed directly, rather than requiring an app + context for configuration. + """ + _load_arg_defaults(kwargs, app=app) + encoding = kwargs.pop("encoding", None) + + if encoding is not None: + warnings.warn( + "'encoding' is deprecated and will be removed in Flask 2.1." + " The data must be a string or UTF-8 bytes.", + DeprecationWarning, + stacklevel=2, + ) + + if isinstance(s, bytes): + s = s.decode(encoding) + + return _json.loads(s, **kwargs) + + +def load(fp: t.IO[str], app: t.Optional["Flask"] = None, **kwargs: t.Any) -> t.Any: + """Deserialize an object from JSON read from a file object. + + Takes the same arguments as the built-in :func:`json.load`, with + some defaults from application configuration. + + :param fp: File object to read JSON from. + :param app: Use this app's config instead of the active app context + or defaults. + :param kwargs: Extra arguments passed to :func:`json.load`. + + .. versionchanged:: 2.0 + ``encoding`` is deprecated and will be removed in Flask 2.1. The + file must be text mode, or binary mode with UTF-8 bytes. + """ + _load_arg_defaults(kwargs, app=app) + encoding = kwargs.pop("encoding", None) + + if encoding is not None: + warnings.warn( + "'encoding' is deprecated and will be removed in Flask 2.1." + " The file must be text mode, or binary mode with UTF-8" + " bytes.", + DeprecationWarning, + stacklevel=2, + ) + + if isinstance(fp.read(0), bytes): + fp = io.TextIOWrapper(fp, encoding) # type: ignore + + return _json.load(fp, **kwargs) + + +def htmlsafe_dumps(obj: t.Any, **kwargs: t.Any) -> str: + """Serialize an object to a string of JSON with :func:`dumps`, then + replace HTML-unsafe characters with Unicode escapes and mark the + result safe with :class:`~markupsafe.Markup`. + + This is available in templates as the ``|tojson`` filter. + + The returned string is safe to render in HTML documents and + ``') + # => <script> do_nasty_stuff() </script> + # sanitize_html('Click here for $100') + # => Click here for $100 + def sanitize_token(self, token): + + # accommodate filters which use token_type differently + token_type = token["type"] + if token_type in ("StartTag", "EndTag", "EmptyTag"): + name = token["name"] + namespace = token["namespace"] + if ((namespace, name) in self.allowed_elements or + (namespace is None and + (namespaces["html"], name) in self.allowed_elements)): + return self.allowed_token(token) + else: + return self.disallowed_token(token) + elif token_type == "Comment": + pass + else: + return token + + def allowed_token(self, token): + if "data" in token: + attrs = token["data"] + attr_names = set(attrs.keys()) + + # Remove forbidden attributes + for to_remove in (attr_names - self.allowed_attributes): + del token["data"][to_remove] + attr_names.remove(to_remove) + + # Remove attributes with disallowed URL values + for attr in (attr_names & self.attr_val_is_uri): + assert attr in attrs + # I don't have a clue where this regexp comes from or why it matches those + # characters, nor why we call unescape. I just know it's always been here. + # Should you be worried by this comment in a sanitizer? Yes. On the other hand, all + # this will do is remove *more* than it otherwise would. + val_unescaped = re.sub("[`\x00-\x20\x7f-\xa0\\s]+", '', + unescape(attrs[attr])).lower() + # remove replacement characters from unescaped characters + val_unescaped = val_unescaped.replace("\ufffd", "") + try: + uri = urlparse.urlparse(val_unescaped) + except ValueError: + uri = None + del attrs[attr] + if uri and uri.scheme: + if uri.scheme not in self.allowed_protocols: + del attrs[attr] + if uri.scheme == 'data': + m = data_content_type.match(uri.path) + if not m: + del attrs[attr] + elif m.group('content_type') not in self.allowed_content_types: + del attrs[attr] + + for attr in self.svg_attr_val_allows_ref: + if attr in attrs: + attrs[attr] = re.sub(r'url\s*\(\s*[^#\s][^)]+?\)', + ' ', + unescape(attrs[attr])) + if (token["name"] in self.svg_allow_local_href and + (namespaces['xlink'], 'href') in attrs and re.search(r'^\s*[^#\s].*', + attrs[(namespaces['xlink'], 'href')])): + del attrs[(namespaces['xlink'], 'href')] + if (None, 'style') in attrs: + attrs[(None, 'style')] = self.sanitize_css(attrs[(None, 'style')]) + token["data"] = attrs + return token + + def disallowed_token(self, token): + token_type = token["type"] + if token_type == "EndTag": + token["data"] = "" % token["name"] + elif token["data"]: + assert token_type in ("StartTag", "EmptyTag") + attrs = [] + for (ns, name), v in token["data"].items(): + attrs.append(' %s="%s"' % (name if ns is None else "%s:%s" % (prefixes[ns], name), escape(v))) + token["data"] = "<%s%s>" % (token["name"], ''.join(attrs)) + else: + token["data"] = "<%s>" % token["name"] + if token.get("selfClosing"): + token["data"] = token["data"][:-1] + "/>" + + token["type"] = "Characters" + + del token["name"] + return token + + def sanitize_css(self, style): + # disallow urls + style = re.compile(r'url\s*\(\s*[^\s)]+?\s*\)\s*').sub(' ', style) + + # gauntlet + if not re.match(r"""^([:,;#%.\sa-zA-Z0-9!]|\w-\w|'[\s\w]+'|"[\s\w]+"|\([\d,\s]+\))*$""", style): + return '' + if not re.match(r"^\s*([-\w]+\s*:[^:;]*(;\s*|$))*$", style): + return '' + + clean = [] + for prop, value in re.findall(r"([-\w]+)\s*:\s*([^:;]*)", style): + if not value: + continue + if prop.lower() in self.allowed_css_properties: + clean.append(prop + ': ' + value + ';') + elif prop.split('-')[0].lower() in ['background', 'border', 'margin', + 'padding']: + for keyword in value.split(): + if keyword not in self.allowed_css_keywords and \ + not re.match(r"^(#[0-9a-fA-F]+|rgb\(\d+%?,\d*%?,?\d*%?\)?|\d{0,2}\.?\d{0,2}(cm|em|ex|in|mm|pc|pt|px|%|,|\))?)$", keyword): # noqa + break + else: + clean.append(prop + ': ' + value + ';') + elif prop.lower() in self.allowed_svg_properties: + clean.append(prop + ': ' + value + ';') + + return ' '.join(clean) diff --git a/.venv/lib/python3.6/site-packages/pip/_vendor/html5lib/filters/whitespace.py b/.venv/lib/python3.6/site-packages/pip/_vendor/html5lib/filters/whitespace.py new file mode 100644 index 0000000..0d12584 --- /dev/null +++ b/.venv/lib/python3.6/site-packages/pip/_vendor/html5lib/filters/whitespace.py @@ -0,0 +1,38 @@ +from __future__ import absolute_import, division, unicode_literals + +import re + +from . import base +from ..constants import rcdataElements, spaceCharacters +spaceCharacters = "".join(spaceCharacters) + +SPACES_REGEX = re.compile("[%s]+" % spaceCharacters) + + +class Filter(base.Filter): + """Collapses whitespace except in pre, textarea, and script elements""" + spacePreserveElements = frozenset(["pre", "textarea"] + list(rcdataElements)) + + def __iter__(self): + preserve = 0 + for token in base.Filter.__iter__(self): + type = token["type"] + if type == "StartTag" \ + and (preserve or token["name"] in self.spacePreserveElements): + preserve += 1 + + elif type == "EndTag" and preserve: + preserve -= 1 + + elif not preserve and type == "SpaceCharacters" and token["data"]: + # Test on token["data"] above to not introduce spaces where there were not + token["data"] = " " + + elif not preserve and type == "Characters": + token["data"] = collapse_spaces(token["data"]) + + yield token + + +def collapse_spaces(text): + return SPACES_REGEX.sub(' ', text) diff --git a/.venv/lib/python3.6/site-packages/pip/_vendor/html5lib/html5parser.py b/.venv/lib/python3.6/site-packages/pip/_vendor/html5lib/html5parser.py new file mode 100644 index 0000000..d06784f --- /dev/null +++ b/.venv/lib/python3.6/site-packages/pip/_vendor/html5lib/html5parser.py @@ -0,0 +1,2795 @@ +from __future__ import absolute_import, division, unicode_literals +from pip._vendor.six import with_metaclass, viewkeys + +import types + +from . import _inputstream +from . import _tokenizer + +from . import treebuilders +from .treebuilders.base import Marker + +from . import _utils +from .constants import ( + spaceCharacters, asciiUpper2Lower, + specialElements, headingElements, cdataElements, rcdataElements, + tokenTypes, tagTokenTypes, + namespaces, + htmlIntegrationPointElements, mathmlTextIntegrationPointElements, + adjustForeignAttributes as adjustForeignAttributesMap, + adjustMathMLAttributes, adjustSVGAttributes, + E, + _ReparseException +) + + +def parse(doc, treebuilder="etree", namespaceHTMLElements=True, **kwargs): + """Parse an HTML document as a string or file-like object into a tree + + :arg doc: the document to parse as a string or file-like object + + :arg treebuilder: the treebuilder to use when parsing + + :arg namespaceHTMLElements: whether or not to namespace HTML elements + + :returns: parsed tree + + Example: + + >>> from html5lib.html5parser import parse + >>> parse('

    This is a doc

    ') + + + """ + tb = treebuilders.getTreeBuilder(treebuilder) + p = HTMLParser(tb, namespaceHTMLElements=namespaceHTMLElements) + return p.parse(doc, **kwargs) + + +def parseFragment(doc, container="div", treebuilder="etree", namespaceHTMLElements=True, **kwargs): + """Parse an HTML fragment as a string or file-like object into a tree + + :arg doc: the fragment to parse as a string or file-like object + + :arg container: the container context to parse the fragment in + + :arg treebuilder: the treebuilder to use when parsing + + :arg namespaceHTMLElements: whether or not to namespace HTML elements + + :returns: parsed tree + + Example: + + >>> from html5lib.html5libparser import parseFragment + >>> parseFragment('this is a fragment') + + + """ + tb = treebuilders.getTreeBuilder(treebuilder) + p = HTMLParser(tb, namespaceHTMLElements=namespaceHTMLElements) + return p.parseFragment(doc, container=container, **kwargs) + + +def method_decorator_metaclass(function): + class Decorated(type): + def __new__(meta, classname, bases, classDict): + for attributeName, attribute in classDict.items(): + if isinstance(attribute, types.FunctionType): + attribute = function(attribute) + + classDict[attributeName] = attribute + return type.__new__(meta, classname, bases, classDict) + return Decorated + + +class HTMLParser(object): + """HTML parser + + Generates a tree structure from a stream of (possibly malformed) HTML. + + """ + + def __init__(self, tree=None, strict=False, namespaceHTMLElements=True, debug=False): + """ + :arg tree: a treebuilder class controlling the type of tree that will be + returned. Built in treebuilders can be accessed through + html5lib.treebuilders.getTreeBuilder(treeType) + + :arg strict: raise an exception when a parse error is encountered + + :arg namespaceHTMLElements: whether or not to namespace HTML elements + + :arg debug: whether or not to enable debug mode which logs things + + Example: + + >>> from html5lib.html5parser import HTMLParser + >>> parser = HTMLParser() # generates parser with etree builder + >>> parser = HTMLParser('lxml', strict=True) # generates parser with lxml builder which is strict + + """ + + # Raise an exception on the first error encountered + self.strict = strict + + if tree is None: + tree = treebuilders.getTreeBuilder("etree") + self.tree = tree(namespaceHTMLElements) + self.errors = [] + + self.phases = {name: cls(self, self.tree) for name, cls in + getPhases(debug).items()} + + def _parse(self, stream, innerHTML=False, container="div", scripting=False, **kwargs): + + self.innerHTMLMode = innerHTML + self.container = container + self.scripting = scripting + self.tokenizer = _tokenizer.HTMLTokenizer(stream, parser=self, **kwargs) + self.reset() + + try: + self.mainLoop() + except _ReparseException: + self.reset() + self.mainLoop() + + def reset(self): + self.tree.reset() + self.firstStartTag = False + self.errors = [] + self.log = [] # only used with debug mode + # "quirks" / "limited quirks" / "no quirks" + self.compatMode = "no quirks" + + if self.innerHTMLMode: + self.innerHTML = self.container.lower() + + if self.innerHTML in cdataElements: + self.tokenizer.state = self.tokenizer.rcdataState + elif self.innerHTML in rcdataElements: + self.tokenizer.state = self.tokenizer.rawtextState + elif self.innerHTML == 'plaintext': + self.tokenizer.state = self.tokenizer.plaintextState + else: + # state already is data state + # self.tokenizer.state = self.tokenizer.dataState + pass + self.phase = self.phases["beforeHtml"] + self.phase.insertHtmlElement() + self.resetInsertionMode() + else: + self.innerHTML = False # pylint:disable=redefined-variable-type + self.phase = self.phases["initial"] + + self.lastPhase = None + + self.beforeRCDataPhase = None + + self.framesetOK = True + + @property + def documentEncoding(self): + """Name of the character encoding that was used to decode the input stream, or + :obj:`None` if that is not determined yet + + """ + if not hasattr(self, 'tokenizer'): + return None + return self.tokenizer.stream.charEncoding[0].name + + def isHTMLIntegrationPoint(self, element): + if (element.name == "annotation-xml" and + element.namespace == namespaces["mathml"]): + return ("encoding" in element.attributes and + element.attributes["encoding"].translate( + asciiUpper2Lower) in + ("text/html", "application/xhtml+xml")) + else: + return (element.namespace, element.name) in htmlIntegrationPointElements + + def isMathMLTextIntegrationPoint(self, element): + return (element.namespace, element.name) in mathmlTextIntegrationPointElements + + def mainLoop(self): + CharactersToken = tokenTypes["Characters"] + SpaceCharactersToken = tokenTypes["SpaceCharacters"] + StartTagToken = tokenTypes["StartTag"] + EndTagToken = tokenTypes["EndTag"] + CommentToken = tokenTypes["Comment"] + DoctypeToken = tokenTypes["Doctype"] + ParseErrorToken = tokenTypes["ParseError"] + + for token in self.tokenizer: + prev_token = None + new_token = token + while new_token is not None: + prev_token = new_token + currentNode = self.tree.openElements[-1] if self.tree.openElements else None + currentNodeNamespace = currentNode.namespace if currentNode else None + currentNodeName = currentNode.name if currentNode else None + + type = new_token["type"] + + if type == ParseErrorToken: + self.parseError(new_token["data"], new_token.get("datavars", {})) + new_token = None + else: + if (len(self.tree.openElements) == 0 or + currentNodeNamespace == self.tree.defaultNamespace or + (self.isMathMLTextIntegrationPoint(currentNode) and + ((type == StartTagToken and + token["name"] not in frozenset(["mglyph", "malignmark"])) or + type in (CharactersToken, SpaceCharactersToken))) or + (currentNodeNamespace == namespaces["mathml"] and + currentNodeName == "annotation-xml" and + type == StartTagToken and + token["name"] == "svg") or + (self.isHTMLIntegrationPoint(currentNode) and + type in (StartTagToken, CharactersToken, SpaceCharactersToken))): + phase = self.phase + else: + phase = self.phases["inForeignContent"] + + if type == CharactersToken: + new_token = phase.processCharacters(new_token) + elif type == SpaceCharactersToken: + new_token = phase.processSpaceCharacters(new_token) + elif type == StartTagToken: + new_token = phase.processStartTag(new_token) + elif type == EndTagToken: + new_token = phase.processEndTag(new_token) + elif type == CommentToken: + new_token = phase.processComment(new_token) + elif type == DoctypeToken: + new_token = phase.processDoctype(new_token) + + if (type == StartTagToken and prev_token["selfClosing"] and + not prev_token["selfClosingAcknowledged"]): + self.parseError("non-void-element-with-trailing-solidus", + {"name": prev_token["name"]}) + + # When the loop finishes it's EOF + reprocess = True + phases = [] + while reprocess: + phases.append(self.phase) + reprocess = self.phase.processEOF() + if reprocess: + assert self.phase not in phases + + def parse(self, stream, *args, **kwargs): + """Parse a HTML document into a well-formed tree + + :arg stream: a file-like object or string containing the HTML to be parsed + + The optional encoding parameter must be a string that indicates + the encoding. If specified, that encoding will be used, + regardless of any BOM or later declaration (such as in a meta + element). + + :arg scripting: treat noscript elements as if JavaScript was turned on + + :returns: parsed tree + + Example: + + >>> from html5lib.html5parser import HTMLParser + >>> parser = HTMLParser() + >>> parser.parse('

    This is a doc

    ') + + + """ + self._parse(stream, False, None, *args, **kwargs) + return self.tree.getDocument() + + def parseFragment(self, stream, *args, **kwargs): + """Parse a HTML fragment into a well-formed tree fragment + + :arg container: name of the element we're setting the innerHTML + property if set to None, default to 'div' + + :arg stream: a file-like object or string containing the HTML to be parsed + + The optional encoding parameter must be a string that indicates + the encoding. If specified, that encoding will be used, + regardless of any BOM or later declaration (such as in a meta + element) + + :arg scripting: treat noscript elements as if JavaScript was turned on + + :returns: parsed tree + + Example: + + >>> from html5lib.html5libparser import HTMLParser + >>> parser = HTMLParser() + >>> parser.parseFragment('this is a fragment') + + + """ + self._parse(stream, True, *args, **kwargs) + return self.tree.getFragment() + + def parseError(self, errorcode="XXX-undefined-error", datavars=None): + # XXX The idea is to make errorcode mandatory. + if datavars is None: + datavars = {} + self.errors.append((self.tokenizer.stream.position(), errorcode, datavars)) + if self.strict: + raise ParseError(E[errorcode] % datavars) + + def adjustMathMLAttributes(self, token): + adjust_attributes(token, adjustMathMLAttributes) + + def adjustSVGAttributes(self, token): + adjust_attributes(token, adjustSVGAttributes) + + def adjustForeignAttributes(self, token): + adjust_attributes(token, adjustForeignAttributesMap) + + def reparseTokenNormal(self, token): + # pylint:disable=unused-argument + self.parser.phase() + + def resetInsertionMode(self): + # The name of this method is mostly historical. (It's also used in the + # specification.) + last = False + newModes = { + "select": "inSelect", + "td": "inCell", + "th": "inCell", + "tr": "inRow", + "tbody": "inTableBody", + "thead": "inTableBody", + "tfoot": "inTableBody", + "caption": "inCaption", + "colgroup": "inColumnGroup", + "table": "inTable", + "head": "inBody", + "body": "inBody", + "frameset": "inFrameset", + "html": "beforeHead" + } + for node in self.tree.openElements[::-1]: + nodeName = node.name + new_phase = None + if node == self.tree.openElements[0]: + assert self.innerHTML + last = True + nodeName = self.innerHTML + # Check for conditions that should only happen in the innerHTML + # case + if nodeName in ("select", "colgroup", "head", "html"): + assert self.innerHTML + + if not last and node.namespace != self.tree.defaultNamespace: + continue + + if nodeName in newModes: + new_phase = self.phases[newModes[nodeName]] + break + elif last: + new_phase = self.phases["inBody"] + break + + self.phase = new_phase + + def parseRCDataRawtext(self, token, contentType): + # Generic RCDATA/RAWTEXT Parsing algorithm + assert contentType in ("RAWTEXT", "RCDATA") + + self.tree.insertElement(token) + + if contentType == "RAWTEXT": + self.tokenizer.state = self.tokenizer.rawtextState + else: + self.tokenizer.state = self.tokenizer.rcdataState + + self.originalPhase = self.phase + + self.phase = self.phases["text"] + + +@_utils.memoize +def getPhases(debug): + def log(function): + """Logger that records which phase processes each token""" + type_names = {value: key for key, value in tokenTypes.items()} + + def wrapped(self, *args, **kwargs): + if function.__name__.startswith("process") and len(args) > 0: + token = args[0] + info = {"type": type_names[token['type']]} + if token['type'] in tagTokenTypes: + info["name"] = token['name'] + + self.parser.log.append((self.parser.tokenizer.state.__name__, + self.parser.phase.__class__.__name__, + self.__class__.__name__, + function.__name__, + info)) + return function(self, *args, **kwargs) + else: + return function(self, *args, **kwargs) + return wrapped + + def getMetaclass(use_metaclass, metaclass_func): + if use_metaclass: + return method_decorator_metaclass(metaclass_func) + else: + return type + + # pylint:disable=unused-argument + class Phase(with_metaclass(getMetaclass(debug, log))): + """Base class for helper object that implements each phase of processing + """ + __slots__ = ("parser", "tree", "__startTagCache", "__endTagCache") + + def __init__(self, parser, tree): + self.parser = parser + self.tree = tree + self.__startTagCache = {} + self.__endTagCache = {} + + def processEOF(self): + raise NotImplementedError + + def processComment(self, token): + # For most phases the following is correct. Where it's not it will be + # overridden. + self.tree.insertComment(token, self.tree.openElements[-1]) + + def processDoctype(self, token): + self.parser.parseError("unexpected-doctype") + + def processCharacters(self, token): + self.tree.insertText(token["data"]) + + def processSpaceCharacters(self, token): + self.tree.insertText(token["data"]) + + def processStartTag(self, token): + # Note the caching is done here rather than BoundMethodDispatcher as doing it there + # requires a circular reference to the Phase, and this ends up with a significant + # (CPython 2.7, 3.8) GC cost when parsing many short inputs + name = token["name"] + # In Py2, using `in` is quicker in general than try/except KeyError + # In Py3, `in` is quicker when there are few cache hits (typically short inputs) + if name in self.__startTagCache: + func = self.__startTagCache[name] + else: + func = self.__startTagCache[name] = self.startTagHandler[name] + # bound the cache size in case we get loads of unknown tags + while len(self.__startTagCache) > len(self.startTagHandler) * 1.1: + # this makes the eviction policy random on Py < 3.7 and FIFO >= 3.7 + self.__startTagCache.pop(next(iter(self.__startTagCache))) + return func(token) + + def startTagHtml(self, token): + if not self.parser.firstStartTag and token["name"] == "html": + self.parser.parseError("non-html-root") + # XXX Need a check here to see if the first start tag token emitted is + # this token... If it's not, invoke self.parser.parseError(). + for attr, value in token["data"].items(): + if attr not in self.tree.openElements[0].attributes: + self.tree.openElements[0].attributes[attr] = value + self.parser.firstStartTag = False + + def processEndTag(self, token): + # Note the caching is done here rather than BoundMethodDispatcher as doing it there + # requires a circular reference to the Phase, and this ends up with a significant + # (CPython 2.7, 3.8) GC cost when parsing many short inputs + name = token["name"] + # In Py2, using `in` is quicker in general than try/except KeyError + # In Py3, `in` is quicker when there are few cache hits (typically short inputs) + if name in self.__endTagCache: + func = self.__endTagCache[name] + else: + func = self.__endTagCache[name] = self.endTagHandler[name] + # bound the cache size in case we get loads of unknown tags + while len(self.__endTagCache) > len(self.endTagHandler) * 1.1: + # this makes the eviction policy random on Py < 3.7 and FIFO >= 3.7 + self.__endTagCache.pop(next(iter(self.__endTagCache))) + return func(token) + + class InitialPhase(Phase): + __slots__ = tuple() + + def processSpaceCharacters(self, token): + pass + + def processComment(self, token): + self.tree.insertComment(token, self.tree.document) + + def processDoctype(self, token): + name = token["name"] + publicId = token["publicId"] + systemId = token["systemId"] + correct = token["correct"] + + if (name != "html" or publicId is not None or + systemId is not None and systemId != "about:legacy-compat"): + self.parser.parseError("unknown-doctype") + + if publicId is None: + publicId = "" + + self.tree.insertDoctype(token) + + if publicId != "": + publicId = publicId.translate(asciiUpper2Lower) + + if (not correct or token["name"] != "html" or + publicId.startswith( + ("+//silmaril//dtd html pro v0r11 19970101//", + "-//advasoft ltd//dtd html 3.0 aswedit + extensions//", + "-//as//dtd html 3.0 aswedit + extensions//", + "-//ietf//dtd html 2.0 level 1//", + "-//ietf//dtd html 2.0 level 2//", + "-//ietf//dtd html 2.0 strict level 1//", + "-//ietf//dtd html 2.0 strict level 2//", + "-//ietf//dtd html 2.0 strict//", + "-//ietf//dtd html 2.0//", + "-//ietf//dtd html 2.1e//", + "-//ietf//dtd html 3.0//", + "-//ietf//dtd html 3.2 final//", + "-//ietf//dtd html 3.2//", + "-//ietf//dtd html 3//", + "-//ietf//dtd html level 0//", + "-//ietf//dtd html level 1//", + "-//ietf//dtd html level 2//", + "-//ietf//dtd html level 3//", + "-//ietf//dtd html strict level 0//", + "-//ietf//dtd html strict level 1//", + "-//ietf//dtd html strict level 2//", + "-//ietf//dtd html strict level 3//", + "-//ietf//dtd html strict//", + "-//ietf//dtd html//", + "-//metrius//dtd metrius presentational//", + "-//microsoft//dtd internet explorer 2.0 html strict//", + "-//microsoft//dtd internet explorer 2.0 html//", + "-//microsoft//dtd internet explorer 2.0 tables//", + "-//microsoft//dtd internet explorer 3.0 html strict//", + "-//microsoft//dtd internet explorer 3.0 html//", + "-//microsoft//dtd internet explorer 3.0 tables//", + "-//netscape comm. corp.//dtd html//", + "-//netscape comm. corp.//dtd strict html//", + "-//o'reilly and associates//dtd html 2.0//", + "-//o'reilly and associates//dtd html extended 1.0//", + "-//o'reilly and associates//dtd html extended relaxed 1.0//", + "-//softquad software//dtd hotmetal pro 6.0::19990601::extensions to html 4.0//", + "-//softquad//dtd hotmetal pro 4.0::19971010::extensions to html 4.0//", + "-//spyglass//dtd html 2.0 extended//", + "-//sq//dtd html 2.0 hotmetal + extensions//", + "-//sun microsystems corp.//dtd hotjava html//", + "-//sun microsystems corp.//dtd hotjava strict html//", + "-//w3c//dtd html 3 1995-03-24//", + "-//w3c//dtd html 3.2 draft//", + "-//w3c//dtd html 3.2 final//", + "-//w3c//dtd html 3.2//", + "-//w3c//dtd html 3.2s draft//", + "-//w3c//dtd html 4.0 frameset//", + "-//w3c//dtd html 4.0 transitional//", + "-//w3c//dtd html experimental 19960712//", + "-//w3c//dtd html experimental 970421//", + "-//w3c//dtd w3 html//", + "-//w3o//dtd w3 html 3.0//", + "-//webtechs//dtd mozilla html 2.0//", + "-//webtechs//dtd mozilla html//")) or + publicId in ("-//w3o//dtd w3 html strict 3.0//en//", + "-/w3c/dtd html 4.0 transitional/en", + "html") or + publicId.startswith( + ("-//w3c//dtd html 4.01 frameset//", + "-//w3c//dtd html 4.01 transitional//")) and + systemId is None or + systemId and systemId.lower() == "http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd"): + self.parser.compatMode = "quirks" + elif (publicId.startswith( + ("-//w3c//dtd xhtml 1.0 frameset//", + "-//w3c//dtd xhtml 1.0 transitional//")) or + publicId.startswith( + ("-//w3c//dtd html 4.01 frameset//", + "-//w3c//dtd html 4.01 transitional//")) and + systemId is not None): + self.parser.compatMode = "limited quirks" + + self.parser.phase = self.parser.phases["beforeHtml"] + + def anythingElse(self): + self.parser.compatMode = "quirks" + self.parser.phase = self.parser.phases["beforeHtml"] + + def processCharacters(self, token): + self.parser.parseError("expected-doctype-but-got-chars") + self.anythingElse() + return token + + def processStartTag(self, token): + self.parser.parseError("expected-doctype-but-got-start-tag", + {"name": token["name"]}) + self.anythingElse() + return token + + def processEndTag(self, token): + self.parser.parseError("expected-doctype-but-got-end-tag", + {"name": token["name"]}) + self.anythingElse() + return token + + def processEOF(self): + self.parser.parseError("expected-doctype-but-got-eof") + self.anythingElse() + return True + + class BeforeHtmlPhase(Phase): + __slots__ = tuple() + + # helper methods + def insertHtmlElement(self): + self.tree.insertRoot(impliedTagToken("html", "StartTag")) + self.parser.phase = self.parser.phases["beforeHead"] + + # other + def processEOF(self): + self.insertHtmlElement() + return True + + def processComment(self, token): + self.tree.insertComment(token, self.tree.document) + + def processSpaceCharacters(self, token): + pass + + def processCharacters(self, token): + self.insertHtmlElement() + return token + + def processStartTag(self, token): + if token["name"] == "html": + self.parser.firstStartTag = True + self.insertHtmlElement() + return token + + def processEndTag(self, token): + if token["name"] not in ("head", "body", "html", "br"): + self.parser.parseError("unexpected-end-tag-before-html", + {"name": token["name"]}) + else: + self.insertHtmlElement() + return token + + class BeforeHeadPhase(Phase): + __slots__ = tuple() + + def processEOF(self): + self.startTagHead(impliedTagToken("head", "StartTag")) + return True + + def processSpaceCharacters(self, token): + pass + + def processCharacters(self, token): + self.startTagHead(impliedTagToken("head", "StartTag")) + return token + + def startTagHtml(self, token): + return self.parser.phases["inBody"].processStartTag(token) + + def startTagHead(self, token): + self.tree.insertElement(token) + self.tree.headPointer = self.tree.openElements[-1] + self.parser.phase = self.parser.phases["inHead"] + + def startTagOther(self, token): + self.startTagHead(impliedTagToken("head", "StartTag")) + return token + + def endTagImplyHead(self, token): + self.startTagHead(impliedTagToken("head", "StartTag")) + return token + + def endTagOther(self, token): + self.parser.parseError("end-tag-after-implied-root", + {"name": token["name"]}) + + startTagHandler = _utils.MethodDispatcher([ + ("html", startTagHtml), + ("head", startTagHead) + ]) + startTagHandler.default = startTagOther + + endTagHandler = _utils.MethodDispatcher([ + (("head", "body", "html", "br"), endTagImplyHead) + ]) + endTagHandler.default = endTagOther + + class InHeadPhase(Phase): + __slots__ = tuple() + + # the real thing + def processEOF(self): + self.anythingElse() + return True + + def processCharacters(self, token): + self.anythingElse() + return token + + def startTagHtml(self, token): + return self.parser.phases["inBody"].processStartTag(token) + + def startTagHead(self, token): + self.parser.parseError("two-heads-are-not-better-than-one") + + def startTagBaseLinkCommand(self, token): + self.tree.insertElement(token) + self.tree.openElements.pop() + token["selfClosingAcknowledged"] = True + + def startTagMeta(self, token): + self.tree.insertElement(token) + self.tree.openElements.pop() + token["selfClosingAcknowledged"] = True + + attributes = token["data"] + if self.parser.tokenizer.stream.charEncoding[1] == "tentative": + if "charset" in attributes: + self.parser.tokenizer.stream.changeEncoding(attributes["charset"]) + elif ("content" in attributes and + "http-equiv" in attributes and + attributes["http-equiv"].lower() == "content-type"): + # Encoding it as UTF-8 here is a hack, as really we should pass + # the abstract Unicode string, and just use the + # ContentAttrParser on that, but using UTF-8 allows all chars + # to be encoded and as a ASCII-superset works. + data = _inputstream.EncodingBytes(attributes["content"].encode("utf-8")) + parser = _inputstream.ContentAttrParser(data) + codec = parser.parse() + self.parser.tokenizer.stream.changeEncoding(codec) + + def startTagTitle(self, token): + self.parser.parseRCDataRawtext(token, "RCDATA") + + def startTagNoFramesStyle(self, token): + # Need to decide whether to implement the scripting-disabled case + self.parser.parseRCDataRawtext(token, "RAWTEXT") + + def startTagNoscript(self, token): + if self.parser.scripting: + self.parser.parseRCDataRawtext(token, "RAWTEXT") + else: + self.tree.insertElement(token) + self.parser.phase = self.parser.phases["inHeadNoscript"] + + def startTagScript(self, token): + self.tree.insertElement(token) + self.parser.tokenizer.state = self.parser.tokenizer.scriptDataState + self.parser.originalPhase = self.parser.phase + self.parser.phase = self.parser.phases["text"] + + def startTagOther(self, token): + self.anythingElse() + return token + + def endTagHead(self, token): + node = self.parser.tree.openElements.pop() + assert node.name == "head", "Expected head got %s" % node.name + self.parser.phase = self.parser.phases["afterHead"] + + def endTagHtmlBodyBr(self, token): + self.anythingElse() + return token + + def endTagOther(self, token): + self.parser.parseError("unexpected-end-tag", {"name": token["name"]}) + + def anythingElse(self): + self.endTagHead(impliedTagToken("head")) + + startTagHandler = _utils.MethodDispatcher([ + ("html", startTagHtml), + ("title", startTagTitle), + (("noframes", "style"), startTagNoFramesStyle), + ("noscript", startTagNoscript), + ("script", startTagScript), + (("base", "basefont", "bgsound", "command", "link"), + startTagBaseLinkCommand), + ("meta", startTagMeta), + ("head", startTagHead) + ]) + startTagHandler.default = startTagOther + + endTagHandler = _utils.MethodDispatcher([ + ("head", endTagHead), + (("br", "html", "body"), endTagHtmlBodyBr) + ]) + endTagHandler.default = endTagOther + + class InHeadNoscriptPhase(Phase): + __slots__ = tuple() + + def processEOF(self): + self.parser.parseError("eof-in-head-noscript") + self.anythingElse() + return True + + def processComment(self, token): + return self.parser.phases["inHead"].processComment(token) + + def processCharacters(self, token): + self.parser.parseError("char-in-head-noscript") + self.anythingElse() + return token + + def processSpaceCharacters(self, token): + return self.parser.phases["inHead"].processSpaceCharacters(token) + + def startTagHtml(self, token): + return self.parser.phases["inBody"].processStartTag(token) + + def startTagBaseLinkCommand(self, token): + return self.parser.phases["inHead"].processStartTag(token) + + def startTagHeadNoscript(self, token): + self.parser.parseError("unexpected-start-tag", {"name": token["name"]}) + + def startTagOther(self, token): + self.parser.parseError("unexpected-inhead-noscript-tag", {"name": token["name"]}) + self.anythingElse() + return token + + def endTagNoscript(self, token): + node = self.parser.tree.openElements.pop() + assert node.name == "noscript", "Expected noscript got %s" % node.name + self.parser.phase = self.parser.phases["inHead"] + + def endTagBr(self, token): + self.parser.parseError("unexpected-inhead-noscript-tag", {"name": token["name"]}) + self.anythingElse() + return token + + def endTagOther(self, token): + self.parser.parseError("unexpected-end-tag", {"name": token["name"]}) + + def anythingElse(self): + # Caller must raise parse error first! + self.endTagNoscript(impliedTagToken("noscript")) + + startTagHandler = _utils.MethodDispatcher([ + ("html", startTagHtml), + (("basefont", "bgsound", "link", "meta", "noframes", "style"), startTagBaseLinkCommand), + (("head", "noscript"), startTagHeadNoscript), + ]) + startTagHandler.default = startTagOther + + endTagHandler = _utils.MethodDispatcher([ + ("noscript", endTagNoscript), + ("br", endTagBr), + ]) + endTagHandler.default = endTagOther + + class AfterHeadPhase(Phase): + __slots__ = tuple() + + def processEOF(self): + self.anythingElse() + return True + + def processCharacters(self, token): + self.anythingElse() + return token + + def startTagHtml(self, token): + return self.parser.phases["inBody"].processStartTag(token) + + def startTagBody(self, token): + self.parser.framesetOK = False + self.tree.insertElement(token) + self.parser.phase = self.parser.phases["inBody"] + + def startTagFrameset(self, token): + self.tree.insertElement(token) + self.parser.phase = self.parser.phases["inFrameset"] + + def startTagFromHead(self, token): + self.parser.parseError("unexpected-start-tag-out-of-my-head", + {"name": token["name"]}) + self.tree.openElements.append(self.tree.headPointer) + self.parser.phases["inHead"].processStartTag(token) + for node in self.tree.openElements[::-1]: + if node.name == "head": + self.tree.openElements.remove(node) + break + + def startTagHead(self, token): + self.parser.parseError("unexpected-start-tag", {"name": token["name"]}) + + def startTagOther(self, token): + self.anythingElse() + return token + + def endTagHtmlBodyBr(self, token): + self.anythingElse() + return token + + def endTagOther(self, token): + self.parser.parseError("unexpected-end-tag", {"name": token["name"]}) + + def anythingElse(self): + self.tree.insertElement(impliedTagToken("body", "StartTag")) + self.parser.phase = self.parser.phases["inBody"] + self.parser.framesetOK = True + + startTagHandler = _utils.MethodDispatcher([ + ("html", startTagHtml), + ("body", startTagBody), + ("frameset", startTagFrameset), + (("base", "basefont", "bgsound", "link", "meta", "noframes", "script", + "style", "title"), + startTagFromHead), + ("head", startTagHead) + ]) + startTagHandler.default = startTagOther + endTagHandler = _utils.MethodDispatcher([(("body", "html", "br"), + endTagHtmlBodyBr)]) + endTagHandler.default = endTagOther + + class InBodyPhase(Phase): + # http://www.whatwg.org/specs/web-apps/current-work/#parsing-main-inbody + # the really-really-really-very crazy mode + __slots__ = ("processSpaceCharacters",) + + def __init__(self, *args, **kwargs): + super(InBodyPhase, self).__init__(*args, **kwargs) + # Set this to the default handler + self.processSpaceCharacters = self.processSpaceCharactersNonPre + + def isMatchingFormattingElement(self, node1, node2): + return (node1.name == node2.name and + node1.namespace == node2.namespace and + node1.attributes == node2.attributes) + + # helper + def addFormattingElement(self, token): + self.tree.insertElement(token) + element = self.tree.openElements[-1] + + matchingElements = [] + for node in self.tree.activeFormattingElements[::-1]: + if node is Marker: + break + elif self.isMatchingFormattingElement(node, element): + matchingElements.append(node) + + assert len(matchingElements) <= 3 + if len(matchingElements) == 3: + self.tree.activeFormattingElements.remove(matchingElements[-1]) + self.tree.activeFormattingElements.append(element) + + # the real deal + def processEOF(self): + allowed_elements = frozenset(("dd", "dt", "li", "p", "tbody", "td", + "tfoot", "th", "thead", "tr", "body", + "html")) + for node in self.tree.openElements[::-1]: + if node.name not in allowed_elements: + self.parser.parseError("expected-closing-tag-but-got-eof") + break + # Stop parsing + + def processSpaceCharactersDropNewline(self, token): + # Sometimes (start of 
    , , and 
+
+
    
+  The debugger caught an exception in your WSGI application.  You can now
+  look at the traceback which led to the error.  
+  If you enable JavaScript you can also use additional features such as code
+  execution (if the evalex feature is enabled), automatic pasting of the
+  exceptions and much more.
+
    
+"""
+    + FOOTER
+    + """
+
+"""
+)
+
+CONSOLE_HTML = (
+    HEADER
+    + """\
+
    Interactive Console
    
+
    
+In this console you can execute Python expressions in the context of the
+application.  The initial namespace was created by the debugger automatically.
+
    
+
    The Console requires JavaScript.
    
+"""
+    + FOOTER
+)
+
+SUMMARY_HTML = """\
+
    
+  %(title)s
+  
      %(frames)s
    
+  %(description)s
+
    
+"""
+
+FRAME_HTML = """\
+
    
+  
    File "%(filename)s",
+      line %(lineno)s,
+      in %(function_name)s
    
+  
    %(lines)s
    
+
    
+"""
+
+SOURCE_LINE_HTML = """\
+
+  %(lineno)s
+  %(code)s
+
+"""
+
+
+def render_console_html(secret: str, evalex_trusted: bool = True) -> str:
+    return CONSOLE_HTML % {
+        "evalex": "true",
+        "evalex_trusted": "true" if evalex_trusted else "false",
+        "console": "true",
+        "title": "Console",
+        "secret": secret,
+        "traceback_id": -1,
+    }
+
+
+def get_current_traceback(
+    ignore_system_exceptions: bool = False,
+    show_hidden_frames: bool = False,
+    skip: int = 0,
+) -> "Traceback":
+    """Get the current exception info as `Traceback` object.  Per default
+    calling this method will reraise system exceptions such as generator exit,
+    system exit or others.  This behavior can be disabled by passing `False`
+    to the function as first parameter.
+    """
+    info = t.cast(
+        t.Tuple[t.Type[BaseException], BaseException, TracebackType], sys.exc_info()
+    )
+    exc_type, exc_value, tb = info
+
+    if ignore_system_exceptions and exc_type in {
+        SystemExit,
+        KeyboardInterrupt,
+        GeneratorExit,
+    }:
+        raise
+    for _ in range(skip):
+        if tb.tb_next is None:
+            break
+        tb = tb.tb_next
+    tb = Traceback(exc_type, exc_value, tb)
+    if not show_hidden_frames:
+        tb.filter_hidden_frames()
+    return tb
+
+
+class Line:
+    """Helper for the source renderer."""
+
+    __slots__ = ("lineno", "code", "in_frame", "current")
+
+    def __init__(self, lineno: int, code: str) -> None:
+        self.lineno = lineno
+        self.code = code
+        self.in_frame = False
+        self.current = False
+
+    @property
+    def classes(self) -> t.List[str]:
+        rv = ["line"]
+        if self.in_frame:
+            rv.append("in-frame")
+        if self.current:
+            rv.append("current")
+        return rv
+
+    def render(self) -> str:
+        return SOURCE_LINE_HTML % {
+            "classes": " ".join(self.classes),
+            "lineno": self.lineno,
+            "code": escape(self.code),
+        }
+
+
+class Traceback:
+    """Wraps a traceback."""
+
+    def __init__(
+        self,
+        exc_type: t.Type[BaseException],
+        exc_value: BaseException,
+        tb: TracebackType,
+    ) -> None:
+        self.exc_type = exc_type
+        self.exc_value = exc_value
+        self.tb = tb
+
+        exception_type = exc_type.__name__
+        if exc_type.__module__ not in {"builtins", "__builtin__", "exceptions"}:
+            exception_type = f"{exc_type.__module__}.{exception_type}"
+        self.exception_type = exception_type
+
+        self.groups = []
+        memo = set()
+        while True:
+            self.groups.append(Group(exc_type, exc_value, tb))
+            memo.add(id(exc_value))
+            exc_value = exc_value.__cause__ or exc_value.__context__  # type: ignore
+            if exc_value is None or id(exc_value) in memo:
+                break
+            exc_type = type(exc_value)
+            tb = exc_value.__traceback__  # type: ignore
+        self.groups.reverse()
+        self.frames = [frame for group in self.groups for frame in group.frames]
+
+    def filter_hidden_frames(self) -> None:
+        """Remove the frames according to the paste spec."""
+        for group in self.groups:
+            group.filter_hidden_frames()
+
+        self.frames[:] = [frame for group in self.groups for frame in group.frames]
+
+    @property
+    def is_syntax_error(self) -> bool:
+        """Is it a syntax error?"""
+        return isinstance(self.exc_value, SyntaxError)
+
+    @property
+    def exception(self) -> str:
+        """String representation of the final exception."""
+        return self.groups[-1].exception
+
+    def log(self, logfile: t.Optional[t.IO[str]] = None) -> None:
+        """Log the ASCII traceback into a file object."""
+        if logfile is None:
+            logfile = sys.stderr
+        tb = f"{self.plaintext.rstrip()}\n"
+        logfile.write(tb)
+
+    def render_summary(self, include_title: bool = True) -> str:
+        """Render the traceback for the interactive console."""
+        title = ""
+        classes = ["traceback"]
+        if not self.frames:
+            classes.append("noframe-traceback")
+            frames = []
+        else:
+            library_frames = sum(frame.is_library for frame in self.frames)
+            mark_lib = 0 < library_frames < len(self.frames)
+            frames = [group.render(mark_lib=mark_lib) for group in self.groups]
+
+        if include_title:
+            if self.is_syntax_error:
+                title = "Syntax Error"
+            else:
+                title = "Traceback (most recent call last):"
+
+        if self.is_syntax_error:
+            description = f"
    {escape(self.exception)}
    "
+        else:
+            description = f"
    {escape(self.exception)}
    "
+
+        return SUMMARY_HTML % {
+            "classes": " ".join(classes),
+            "title": f"
    {title if title else ''}
    ",
+            "frames": "\n".join(frames),
+            "description": description,
+        }
+
+    def render_full(
+        self,
+        evalex: bool = False,
+        secret: t.Optional[str] = None,
+        evalex_trusted: bool = True,
+    ) -> str:
+        """Render the Full HTML page with the traceback info."""
+        exc = escape(self.exception)
+        return PAGE_HTML % {
+            "evalex": "true" if evalex else "false",
+            "evalex_trusted": "true" if evalex_trusted else "false",
+            "console": "false",
+            "title": exc,
+            "exception": exc,
+            "exception_type": escape(self.exception_type),
+            "summary": self.render_summary(include_title=False),
+            "plaintext": escape(self.plaintext),
+            "plaintext_cs": re.sub("-{2,}", "-", self.plaintext),
+            "traceback_id": self.id,
+            "secret": secret,
+        }
+
+    @cached_property
+    def plaintext(self) -> str:
+        return "\n".join([group.render_text() for group in self.groups])
+
+    @property
+    def id(self) -> int:
+        return id(self)
+
+
+class Group:
+    """A group of frames for an exception in a traceback. If the
+    exception has a ``__cause__`` or ``__context__``, there are multiple
+    exception groups.
+    """
+
+    def __init__(
+        self,
+        exc_type: t.Type[BaseException],
+        exc_value: BaseException,
+        tb: TracebackType,
+    ) -> None:
+        self.exc_type = exc_type
+        self.exc_value = exc_value
+        self.info = None
+        if exc_value.__cause__ is not None:
+            self.info = (
+                "The above exception was the direct cause of the following exception"
+            )
+        elif exc_value.__context__ is not None:
+            self.info = (
+                "During handling of the above exception, another exception occurred"
+            )
+
+        self.frames = []
+        while tb is not None:
+            self.frames.append(Frame(exc_type, exc_value, tb))
+            tb = tb.tb_next  # type: ignore
+
+    def filter_hidden_frames(self) -> None:
+        # An exception may not have a traceback to filter frames, such
+        # as one re-raised from ProcessPoolExecutor.
+        if not self.frames:
+            return
+
+        new_frames: t.List[Frame] = []
+        hidden = False
+
+        for frame in self.frames:
+            hide = frame.hide
+            if hide in ("before", "before_and_this"):
+                new_frames = []
+                hidden = False
+                if hide == "before_and_this":
+                    continue
+            elif hide in ("reset", "reset_and_this"):
+                hidden = False
+                if hide == "reset_and_this":
+                    continue
+            elif hide in ("after", "after_and_this"):
+                hidden = True
+                if hide == "after_and_this":
+                    continue
+            elif hide or hidden:
+                continue
+            new_frames.append(frame)
+
+        # if we only have one frame and that frame is from the codeop
+        # module, remove it.
+        if len(new_frames) == 1 and self.frames[0].module == "codeop":
+            del self.frames[:]
+
+        # if the last frame is missing something went terrible wrong :(
+        elif self.frames[-1] in new_frames:
+            self.frames[:] = new_frames
+
+    @property
+    def exception(self) -> str:
+        """String representation of the exception."""
+        buf = traceback.format_exception_only(self.exc_type, self.exc_value)
+        rv = "".join(buf).strip()
+        return _to_str(rv, "utf-8", "replace")
+
+    def render(self, mark_lib: bool = True) -> str:
+        out = []
+        if self.info is not None:
+            out.append(f'
  1. {self.info}:
    ')
+        for frame in self.frames:
+            title = f' title="{escape(frame.info)}"' if frame.info else ""
+            out.append(f"{frame.render(mark_lib=mark_lib)}")
+        return "\n".join(out)
+
+    def render_text(self) -> str:
+        out = []
+        if self.info is not None:
+            out.append(f"\n{self.info}:\n")
+        out.append("Traceback (most recent call last):")
+        for frame in self.frames:
+            out.append(frame.render_text())
+        out.append(self.exception)
+        return "\n".join(out)
+
+
+class Frame:
+    """A single frame in a traceback."""
+
+    def __init__(
+        self,
+        exc_type: t.Type[BaseException],
+        exc_value: BaseException,
+        tb: TracebackType,
+    ) -> None:
+        self.lineno = tb.tb_lineno
+        self.function_name = tb.tb_frame.f_code.co_name
+        self.locals = tb.tb_frame.f_locals
+        self.globals = tb.tb_frame.f_globals
+
+        fn = inspect.getsourcefile(tb) or inspect.getfile(tb)
+        if fn[-4:] in (".pyo", ".pyc"):
+            fn = fn[:-1]
+        # if it's a file on the file system resolve the real filename.
+        if os.path.isfile(fn):
+            fn = os.path.realpath(fn)
+        self.filename = _to_str(fn, get_filesystem_encoding())
+        self.module = self.globals.get("__name__", self.locals.get("__name__"))
+        self.loader = self.globals.get("__loader__", self.locals.get("__loader__"))
+        self.code = tb.tb_frame.f_code
+
+        # support for paste's traceback extensions
+        self.hide = self.locals.get("__traceback_hide__", False)
+        info = self.locals.get("__traceback_info__")
+        if info is not None:
+            info = _to_str(info, "utf-8", "replace")
+        self.info = info
+
+    def render(self, mark_lib: bool = True) -> str:
+        """Render a single frame in a traceback."""
+        return FRAME_HTML % {
+            "id": self.id,
+            "filename": escape(self.filename),
+            "lineno": self.lineno,
+            "function_name": escape(self.function_name),
+            "lines": self.render_line_context(),
+            "library": "library" if mark_lib and self.is_library else "",
+        }
+
+    @cached_property
+    def is_library(self) -> bool:
+        return any(
+            self.filename.startswith(os.path.realpath(path))
+            for path in sysconfig.get_paths().values()
+        )
+
+    def render_text(self) -> str:
+        return (
+            f'  File "{self.filename}", line {self.lineno}, in {self.function_name}\n'
+            f"    {self.current_line.strip()}"
+        )
+
+    def render_line_context(self) -> str:
+        before, current, after = self.get_context_lines()
+        rv = []
+
+        def render_line(line: str, cls: str) -> None:
+            line = line.expandtabs().rstrip()
+            stripped_line = line.strip()
+            prefix = len(line) - len(stripped_line)
+            rv.append(
+                f'
    {" " * prefix}'
+                f"{escape(stripped_line) if stripped_line else ' '}
    "
+            )
+
+        for line in before:
+            render_line(line, "before")
+        render_line(current, "current")
+        for line in after:
+            render_line(line, "after")
+
+        return "\n".join(rv)
+
+    def get_annotated_lines(self) -> t.List[Line]:
+        """Helper function that returns lines with extra information."""
+        lines = [Line(idx + 1, x) for idx, x in enumerate(self.sourcelines)]
+
+        # find function definition and mark lines
+        if hasattr(self.code, "co_firstlineno"):
+            lineno = self.code.co_firstlineno - 1
+            while lineno > 0:
+                if _funcdef_re.match(lines[lineno].code):
+                    break
+                lineno -= 1
+            try:
+                offset = len(inspect.getblock([f"{x.code}\n" for x in lines[lineno:]]))
+            except TokenError:
+                offset = 0
+            for line in lines[lineno : lineno + offset]:
+                line.in_frame = True
+
+        # mark current line
+        try:
+            lines[self.lineno - 1].current = True
+        except IndexError:
+            pass
+
+        return lines
+
+    def eval(self, code: t.Union[str, CodeType], mode: str = "single") -> t.Any:
+        """Evaluate code in the context of the frame."""
+        if isinstance(code, str):
+            code = compile(code, "", mode)
+        return eval(code, self.globals, self.locals)
+
+    @cached_property
+    def sourcelines(self) -> t.List[str]:
+        """The sourcecode of the file as list of strings."""
+        # get sourcecode from loader or file
+        source = None
+        if self.loader is not None:
+            try:
+                if hasattr(self.loader, "get_source"):
+                    source = self.loader.get_source(self.module)
+                elif hasattr(self.loader, "get_source_by_code"):
+                    source = self.loader.get_source_by_code(self.code)
+            except Exception:
+                # we munch the exception so that we don't cause troubles
+                # if the loader is broken.
+                pass
+
+        if source is None:
+            try:
+                with open(self.filename, mode="rb") as f:
+                    source = f.read()
+            except OSError:
+                return []
+
+        # already str?  return right away
+        if isinstance(source, str):
+            return source.splitlines()
+
+        charset = "utf-8"
+        if source.startswith(codecs.BOM_UTF8):
+            source = source[3:]
+        else:
+            for idx, match in enumerate(_line_re.finditer(source)):
+                coding_match = _coding_re.search(match.group())
+                if coding_match is not None:
+                    charset = coding_match.group(1).decode("utf-8")
+                    break
+                if idx > 1:
+                    break
+
+        # on broken cookies we fall back to utf-8 too
+        charset = _to_str(charset)
+        try:
+            codecs.lookup(charset)
+        except LookupError:
+            charset = "utf-8"
+
+        return source.decode(charset, "replace").splitlines()
+
+    def get_context_lines(
+        self, context: int = 5
+    ) -> t.Tuple[t.List[str], str, t.List[str]]:
+        before = self.sourcelines[self.lineno - context - 1 : self.lineno - 1]
+        past = self.sourcelines[self.lineno : self.lineno + context]
+        return (before, self.current_line, past)
+
+    @property
+    def current_line(self) -> str:
+        try:
+            return self.sourcelines[self.lineno - 1]
+        except IndexError:
+            return ""
+
+    @cached_property
+    def console(self) -> Console:
+        return Console(self.globals, self.locals)
+
+    @property
+    def id(self) -> int:
+        return id(self)
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/exceptions.py b/.venv/lib/python3.6/site-packages/werkzeug/exceptions.py
new file mode 100644
index 0000000..16c3964
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/exceptions.py
@@ -0,0 +1,943 @@
+"""Implements a number of Python exceptions which can be raised from within
+a view to trigger a standard HTTP non-200 response.
+
+Usage Example
+-------------
+
+.. code-block:: python
+
+    from werkzeug.wrappers.request import Request
+    from werkzeug.exceptions import HTTPException, NotFound
+
+    def view(request):
+        raise NotFound()
+
+    @Request.application
+    def application(request):
+        try:
+            return view(request)
+        except HTTPException as e:
+            return e
+
+As you can see from this example those exceptions are callable WSGI
+applications. However, they are not Werkzeug response objects. You
+can get a response object by calling ``get_response()`` on a HTTP
+exception.
+
+Keep in mind that you may have to pass an environ (WSGI) or scope
+(ASGI) to ``get_response()`` because some errors fetch additional
+information relating to the request.
+
+If you want to hook in a different exception page to say, a 404 status
+code, you can add a second except for a specific subclass of an error:
+
+.. code-block:: python
+
+    @Request.application
+    def application(request):
+        try:
+            return view(request)
+        except NotFound as e:
+            return not_found(request)
+        except HTTPException as e:
+            return e
+
+"""
+import sys
+import typing as t
+import warnings
+from datetime import datetime
+from html import escape
+
+from ._internal import _get_environ
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from _typeshed.wsgi import StartResponse
+    from _typeshed.wsgi import WSGIEnvironment
+    from .datastructures import WWWAuthenticate
+    from .sansio.response import Response
+    from .wrappers.response import Response as WSGIResponse  # noqa: F401
+
+
+class HTTPException(Exception):
+    """The base class for all HTTP exceptions. This exception can be called as a WSGI
+    application to render a default error page or you can catch the subclasses
+    of it independently and render nicer error messages.
+    """
+
+    code: t.Optional[int] = None
+    description: t.Optional[str] = None
+
+    def __init__(
+        self,
+        description: t.Optional[str] = None,
+        response: t.Optional["Response"] = None,
+    ) -> None:
+        super().__init__()
+        if description is not None:
+            self.description = description
+        self.response = response
+
+    @classmethod
+    def wrap(
+        cls, exception: t.Type[BaseException], name: t.Optional[str] = None
+    ) -> t.Type["HTTPException"]:
+        """Create an exception that is a subclass of the calling HTTP
+        exception and the ``exception`` argument.
+
+        The first argument to the class will be passed to the
+        wrapped ``exception``, the rest to the HTTP exception. If
+        ``e.args`` is not empty and ``e.show_exception`` is ``True``,
+        the wrapped exception message is added to the HTTP error
+        description.
+
+        .. deprecated:: 2.0
+            Will be removed in Werkzeug 2.1. Create a subclass manually
+            instead.
+
+        .. versionchanged:: 0.15.5
+            The ``show_exception`` attribute controls whether the
+            description includes the wrapped exception message.
+
+        .. versionchanged:: 0.15.0
+            The description includes the wrapped exception message.
+        """
+        warnings.warn(
+            "'HTTPException.wrap' is deprecated and will be removed in"
+            " Werkzeug 2.1. Create a subclass manually instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+
+        class newcls(cls, exception):  # type: ignore
+            _description = cls.description
+            show_exception = False
+
+            def __init__(
+                self, arg: t.Optional[t.Any] = None, *args: t.Any, **kwargs: t.Any
+            ) -> None:
+                super().__init__(*args, **kwargs)
+
+                if arg is None:
+                    exception.__init__(self)
+                else:
+                    exception.__init__(self, arg)
+
+            @property
+            def description(self) -> str:
+                if self.show_exception:
+                    return (
+                        f"{self._description}\n"
+                        f"{exception.__name__}: {exception.__str__(self)}"
+                    )
+
+                return self._description  # type: ignore
+
+            @description.setter
+            def description(self, value: str) -> None:
+                self._description = value
+
+        newcls.__module__ = sys._getframe(1).f_globals["__name__"]
+        name = name or cls.__name__ + exception.__name__
+        newcls.__name__ = newcls.__qualname__ = name
+        return newcls
+
+    @property
+    def name(self) -> str:
+        """The status name."""
+        from .http import HTTP_STATUS_CODES
+
+        return HTTP_STATUS_CODES.get(self.code, "Unknown Error")  # type: ignore
+
+    def get_description(
+        self,
+        environ: t.Optional["WSGIEnvironment"] = None,
+        scope: t.Optional[dict] = None,
+    ) -> str:
+        """Get the description."""
+        if self.description is None:
+            description = ""
+        elif not isinstance(self.description, str):
+            description = str(self.description)
+        else:
+            description = self.description
+
+        description = escape(description).replace("\n", "
    ")
+        return f"
    {description}
    "
+
+    def get_body(
+        self,
+        environ: t.Optional["WSGIEnvironment"] = None,
+        scope: t.Optional[dict] = None,
+    ) -> str:
+        """Get the HTML body."""
+        return (
+            '\n'
+            f"{self.code} {escape(self.name)}\n"
+            f"
    {escape(self.name)}
    \n"
+            f"{self.get_description(environ)}\n"
+        )
+
+    def get_headers(
+        self,
+        environ: t.Optional["WSGIEnvironment"] = None,
+        scope: t.Optional[dict] = None,
+    ) -> t.List[t.Tuple[str, str]]:
+        """Get a list of headers."""
+        return [("Content-Type", "text/html; charset=utf-8")]
+
+    def get_response(
+        self,
+        environ: t.Optional["WSGIEnvironment"] = None,
+        scope: t.Optional[dict] = None,
+    ) -> "Response":
+        """Get a response object.  If one was passed to the exception
+        it's returned directly.
+
+        :param environ: the optional environ for the request.  This
+                        can be used to modify the response depending
+                        on how the request looked like.
+        :return: a :class:`Response` object or a subclass thereof.
+        """
+        from .wrappers.response import Response as WSGIResponse  # noqa: F811
+
+        if self.response is not None:
+            return self.response
+        if environ is not None:
+            environ = _get_environ(environ)
+        headers = self.get_headers(environ, scope)
+        return WSGIResponse(self.get_body(environ, scope), self.code, headers)
+
+    def __call__(
+        self, environ: "WSGIEnvironment", start_response: "StartResponse"
+    ) -> t.Iterable[bytes]:
+        """Call the exception as WSGI application.
+
+        :param environ: the WSGI environment.
+        :param start_response: the response callable provided by the WSGI
+                               server.
+        """
+        response = t.cast("WSGIResponse", self.get_response(environ))
+        return response(environ, start_response)
+
+    def __str__(self) -> str:
+        code = self.code if self.code is not None else "???"
+        return f"{code} {self.name}: {self.description}"
+
+    def __repr__(self) -> str:
+        code = self.code if self.code is not None else "???"
+        return f"<{type(self).__name__} '{code}: {self.name}'>"
+
+
+class BadRequest(HTTPException):
+    """*400* `Bad Request`
+
+    Raise if the browser sends something to the application the application
+    or server cannot handle.
+    """
+
+    code = 400
+    description = (
+        "The browser (or proxy) sent a request that this server could "
+        "not understand."
+    )
+
+
+class BadRequestKeyError(BadRequest, KeyError):
+    """An exception that is used to signal both a :exc:`KeyError` and a
+    :exc:`BadRequest`. Used by many of the datastructures.
+    """
+
+    _description = BadRequest.description
+    #: Show the KeyError along with the HTTP error message in the
+    #: response. This should be disabled in production, but can be
+    #: useful in a debug mode.
+    show_exception = False
+
+    def __init__(self, arg: t.Optional[str] = None, *args: t.Any, **kwargs: t.Any):
+        super().__init__(*args, **kwargs)
+
+        if arg is None:
+            KeyError.__init__(self)
+        else:
+            KeyError.__init__(self, arg)
+
+    @property  # type: ignore
+    def description(self) -> str:  # type: ignore
+        if self.show_exception:
+            return (
+                f"{self._description}\n"
+                f"{KeyError.__name__}: {KeyError.__str__(self)}"
+            )
+
+        return self._description
+
+    @description.setter
+    def description(self, value: str) -> None:
+        self._description = value
+
+
+class ClientDisconnected(BadRequest):
+    """Internal exception that is raised if Werkzeug detects a disconnected
+    client.  Since the client is already gone at that point attempting to
+    send the error message to the client might not work and might ultimately
+    result in another exception in the server.  Mainly this is here so that
+    it is silenced by default as far as Werkzeug is concerned.
+
+    Since disconnections cannot be reliably detected and are unspecified
+    by WSGI to a large extent this might or might not be raised if a client
+    is gone.
+
+    .. versionadded:: 0.8
+    """
+
+
+class SecurityError(BadRequest):
+    """Raised if something triggers a security error.  This is otherwise
+    exactly like a bad request error.
+
+    .. versionadded:: 0.9
+    """
+
+
+class BadHost(BadRequest):
+    """Raised if the submitted host is badly formatted.
+
+    .. versionadded:: 0.11.2
+    """
+
+
+class Unauthorized(HTTPException):
+    """*401* ``Unauthorized``
+
+    Raise if the user is not authorized to access a resource.
+
+    The ``www_authenticate`` argument should be used to set the
+    ``WWW-Authenticate`` header. This is used for HTTP basic auth and
+    other schemes. Use :class:`~werkzeug.datastructures.WWWAuthenticate`
+    to create correctly formatted values. Strictly speaking a 401
+    response is invalid if it doesn't provide at least one value for
+    this header, although real clients typically don't care.
+
+    :param description: Override the default message used for the body
+        of the response.
+    :param www-authenticate: A single value, or list of values, for the
+        WWW-Authenticate header(s).
+
+    .. versionchanged:: 2.0
+        Serialize multiple ``www_authenticate`` items into multiple
+        ``WWW-Authenticate`` headers, rather than joining them
+        into a single value, for better interoperability.
+
+    .. versionchanged:: 0.15.3
+        If the ``www_authenticate`` argument is not set, the
+        ``WWW-Authenticate`` header is not set.
+
+    .. versionchanged:: 0.15.3
+        The ``response`` argument was restored.
+
+    .. versionchanged:: 0.15.1
+        ``description`` was moved back as the first argument, restoring
+         its previous position.
+
+    .. versionchanged:: 0.15.0
+        ``www_authenticate`` was added as the first argument, ahead of
+        ``description``.
+    """
+
+    code = 401
+    description = (
+        "The server could not verify that you are authorized to access"
+        " the URL requested. You either supplied the wrong credentials"
+        " (e.g. a bad password), or your browser doesn't understand"
+        " how to supply the credentials required."
+    )
+
+    def __init__(
+        self,
+        description: t.Optional[str] = None,
+        response: t.Optional["Response"] = None,
+        www_authenticate: t.Optional[
+            t.Union["WWWAuthenticate", t.Iterable["WWWAuthenticate"]]
+        ] = None,
+    ) -> None:
+        super().__init__(description, response)
+
+        from .datastructures import WWWAuthenticate
+
+        if isinstance(www_authenticate, WWWAuthenticate):
+            www_authenticate = (www_authenticate,)
+
+        self.www_authenticate = www_authenticate
+
+    def get_headers(
+        self,
+        environ: t.Optional["WSGIEnvironment"] = None,
+        scope: t.Optional[dict] = None,
+    ) -> t.List[t.Tuple[str, str]]:
+        headers = super().get_headers(environ, scope)
+        if self.www_authenticate:
+            headers.extend(("WWW-Authenticate", str(x)) for x in self.www_authenticate)
+        return headers
+
+
+class Forbidden(HTTPException):
+    """*403* `Forbidden`
+
+    Raise if the user doesn't have the permission for the requested resource
+    but was authenticated.
+    """
+
+    code = 403
+    description = (
+        "You don't have the permission to access the requested"
+        " resource. It is either read-protected or not readable by the"
+        " server."
+    )
+
+
+class NotFound(HTTPException):
+    """*404* `Not Found`
+
+    Raise if a resource does not exist and never existed.
+    """
+
+    code = 404
+    description = (
+        "The requested URL was not found on the server. If you entered"
+        " the URL manually please check your spelling and try again."
+    )
+
+
+class MethodNotAllowed(HTTPException):
+    """*405* `Method Not Allowed`
+
+    Raise if the server used a method the resource does not handle.  For
+    example `POST` if the resource is view only.  Especially useful for REST.
+
+    The first argument for this exception should be a list of allowed methods.
+    Strictly speaking the response would be invalid if you don't provide valid
+    methods in the header which you can do with that list.
+    """
+
+    code = 405
+    description = "The method is not allowed for the requested URL."
+
+    def __init__(
+        self,
+        valid_methods: t.Optional[t.Iterable[str]] = None,
+        description: t.Optional[str] = None,
+        response: t.Optional["Response"] = None,
+    ) -> None:
+        """Takes an optional list of valid http methods
+        starting with werkzeug 0.3 the list will be mandatory."""
+        super().__init__(description=description, response=response)
+        self.valid_methods = valid_methods
+
+    def get_headers(
+        self,
+        environ: t.Optional["WSGIEnvironment"] = None,
+        scope: t.Optional[dict] = None,
+    ) -> t.List[t.Tuple[str, str]]:
+        headers = super().get_headers(environ, scope)
+        if self.valid_methods:
+            headers.append(("Allow", ", ".join(self.valid_methods)))
+        return headers
+
+
+class NotAcceptable(HTTPException):
+    """*406* `Not Acceptable`
+
+    Raise if the server can't return any content conforming to the
+    `Accept` headers of the client.
+    """
+
+    code = 406
+    description = (
+        "The resource identified by the request is only capable of"
+        " generating response entities which have content"
+        " characteristics not acceptable according to the accept"
+        " headers sent in the request."
+    )
+
+
+class RequestTimeout(HTTPException):
+    """*408* `Request Timeout`
+
+    Raise to signalize a timeout.
+    """
+
+    code = 408
+    description = (
+        "The server closed the network connection because the browser"
+        " didn't finish the request within the specified time."
+    )
+
+
+class Conflict(HTTPException):
+    """*409* `Conflict`
+
+    Raise to signal that a request cannot be completed because it conflicts
+    with the current state on the server.
+
+    .. versionadded:: 0.7
+    """
+
+    code = 409
+    description = (
+        "A conflict happened while processing the request. The"
+        " resource might have been modified while the request was being"
+        " processed."
+    )
+
+
+class Gone(HTTPException):
+    """*410* `Gone`
+
+    Raise if a resource existed previously and went away without new location.
+    """
+
+    code = 410
+    description = (
+        "The requested URL is no longer available on this server and"
+        " there is no forwarding address. If you followed a link from a"
+        " foreign page, please contact the author of this page."
+    )
+
+
+class LengthRequired(HTTPException):
+    """*411* `Length Required`
+
+    Raise if the browser submitted data but no ``Content-Length`` header which
+    is required for the kind of processing the server does.
+    """
+
+    code = 411
+    description = (
+        "A request with this method requires a valid Content-"
+        "Length header."
+    )
+
+
+class PreconditionFailed(HTTPException):
+    """*412* `Precondition Failed`
+
+    Status code used in combination with ``If-Match``, ``If-None-Match``, or
+    ``If-Unmodified-Since``.
+    """
+
+    code = 412
+    description = (
+        "The precondition on the request for the URL failed positive evaluation."
+    )
+
+
+class RequestEntityTooLarge(HTTPException):
+    """*413* `Request Entity Too Large`
+
+    The status code one should return if the data submitted exceeded a given
+    limit.
+    """
+
+    code = 413
+    description = "The data value transmitted exceeds the capacity limit."
+
+
+class RequestURITooLarge(HTTPException):
+    """*414* `Request URI Too Large`
+
+    Like *413* but for too long URLs.
+    """
+
+    code = 414
+    description = (
+        "The length of the requested URL exceeds the capacity limit for"
+        " this server. The request cannot be processed."
+    )
+
+
+class UnsupportedMediaType(HTTPException):
+    """*415* `Unsupported Media Type`
+
+    The status code returned if the server is unable to handle the media type
+    the client transmitted.
+    """
+
+    code = 415
+    description = (
+        "The server does not support the media type transmitted in the request."
+    )
+
+
+class RequestedRangeNotSatisfiable(HTTPException):
+    """*416* `Requested Range Not Satisfiable`
+
+    The client asked for an invalid part of the file.
+
+    .. versionadded:: 0.7
+    """
+
+    code = 416
+    description = "The server cannot provide the requested range."
+
+    def __init__(
+        self,
+        length: t.Optional[int] = None,
+        units: str = "bytes",
+        description: t.Optional[str] = None,
+        response: t.Optional["Response"] = None,
+    ) -> None:
+        """Takes an optional `Content-Range` header value based on ``length``
+        parameter.
+        """
+        super().__init__(description=description, response=response)
+        self.length = length
+        self.units = units
+
+    def get_headers(
+        self,
+        environ: t.Optional["WSGIEnvironment"] = None,
+        scope: t.Optional[dict] = None,
+    ) -> t.List[t.Tuple[str, str]]:
+        headers = super().get_headers(environ, scope)
+        if self.length is not None:
+            headers.append(("Content-Range", f"{self.units} */{self.length}"))
+        return headers
+
+
+class ExpectationFailed(HTTPException):
+    """*417* `Expectation Failed`
+
+    The server cannot meet the requirements of the Expect request-header.
+
+    .. versionadded:: 0.7
+    """
+
+    code = 417
+    description = "The server could not meet the requirements of the Expect header"
+
+
+class ImATeapot(HTTPException):
+    """*418* `I'm a teapot`
+
+    The server should return this if it is a teapot and someone attempted
+    to brew coffee with it.
+
+    .. versionadded:: 0.7
+    """
+
+    code = 418
+    description = "This server is a teapot, not a coffee machine"
+
+
+class UnprocessableEntity(HTTPException):
+    """*422* `Unprocessable Entity`
+
+    Used if the request is well formed, but the instructions are otherwise
+    incorrect.
+    """
+
+    code = 422
+    description = (
+        "The request was well-formed but was unable to be followed due"
+        " to semantic errors."
+    )
+
+
+class Locked(HTTPException):
+    """*423* `Locked`
+
+    Used if the resource that is being accessed is locked.
+    """
+
+    code = 423
+    description = "The resource that is being accessed is locked."
+
+
+class FailedDependency(HTTPException):
+    """*424* `Failed Dependency`
+
+    Used if the method could not be performed on the resource
+    because the requested action depended on another action and that action failed.
+    """
+
+    code = 424
+    description = (
+        "The method could not be performed on the resource because the"
+        " requested action depended on another action and that action"
+        " failed."
+    )
+
+
+class PreconditionRequired(HTTPException):
+    """*428* `Precondition Required`
+
+    The server requires this request to be conditional, typically to prevent
+    the lost update problem, which is a race condition between two or more
+    clients attempting to update a resource through PUT or DELETE. By requiring
+    each client to include a conditional header ("If-Match" or "If-Unmodified-
+    Since") with the proper value retained from a recent GET request, the
+    server ensures that each client has at least seen the previous revision of
+    the resource.
+    """
+
+    code = 428
+    description = (
+        "This request is required to be conditional; try using"
+        ' "If-Match" or "If-Unmodified-Since".'
+    )
+
+
+class _RetryAfter(HTTPException):
+    """Adds an optional ``retry_after`` parameter which will set the
+    ``Retry-After`` header. May be an :class:`int` number of seconds or
+    a :class:`~datetime.datetime`.
+    """
+
+    def __init__(
+        self,
+        description: t.Optional[str] = None,
+        response: t.Optional["Response"] = None,
+        retry_after: t.Optional[t.Union[datetime, int]] = None,
+    ) -> None:
+        super().__init__(description, response)
+        self.retry_after = retry_after
+
+    def get_headers(
+        self,
+        environ: t.Optional["WSGIEnvironment"] = None,
+        scope: t.Optional[dict] = None,
+    ) -> t.List[t.Tuple[str, str]]:
+        headers = super().get_headers(environ, scope)
+
+        if self.retry_after:
+            if isinstance(self.retry_after, datetime):
+                from .http import http_date
+
+                value = http_date(self.retry_after)
+            else:
+                value = str(self.retry_after)
+
+            headers.append(("Retry-After", value))
+
+        return headers
+
+
+class TooManyRequests(_RetryAfter):
+    """*429* `Too Many Requests`
+
+    The server is limiting the rate at which this user receives
+    responses, and this request exceeds that rate. (The server may use
+    any convenient method to identify users and their request rates).
+    The server may include a "Retry-After" header to indicate how long
+    the user should wait before retrying.
+
+    :param retry_after: If given, set the ``Retry-After`` header to this
+        value. May be an :class:`int` number of seconds or a
+        :class:`~datetime.datetime`.
+
+    .. versionchanged:: 1.0
+        Added ``retry_after`` parameter.
+    """
+
+    code = 429
+    description = "This user has exceeded an allotted request count. Try again later."
+
+
+class RequestHeaderFieldsTooLarge(HTTPException):
+    """*431* `Request Header Fields Too Large`
+
+    The server refuses to process the request because the header fields are too
+    large. One or more individual fields may be too large, or the set of all
+    headers is too large.
+    """
+
+    code = 431
+    description = "One or more header fields exceeds the maximum size."
+
+
+class UnavailableForLegalReasons(HTTPException):
+    """*451* `Unavailable For Legal Reasons`
+
+    This status code indicates that the server is denying access to the
+    resource as a consequence of a legal demand.
+    """
+
+    code = 451
+    description = "Unavailable for legal reasons."
+
+
+class InternalServerError(HTTPException):
+    """*500* `Internal Server Error`
+
+    Raise if an internal server error occurred.  This is a good fallback if an
+    unknown error occurred in the dispatcher.
+
+    .. versionchanged:: 1.0.0
+        Added the :attr:`original_exception` attribute.
+    """
+
+    code = 500
+    description = (
+        "The server encountered an internal error and was unable to"
+        " complete your request. Either the server is overloaded or"
+        " there is an error in the application."
+    )
+
+    def __init__(
+        self,
+        description: t.Optional[str] = None,
+        response: t.Optional["Response"] = None,
+        original_exception: t.Optional[BaseException] = None,
+    ) -> None:
+        #: The original exception that caused this 500 error. Can be
+        #: used by frameworks to provide context when handling
+        #: unexpected errors.
+        self.original_exception = original_exception
+        super().__init__(description=description, response=response)
+
+
+class NotImplemented(HTTPException):
+    """*501* `Not Implemented`
+
+    Raise if the application does not support the action requested by the
+    browser.
+    """
+
+    code = 501
+    description = "The server does not support the action requested by the browser."
+
+
+class BadGateway(HTTPException):
+    """*502* `Bad Gateway`
+
+    If you do proxying in your application you should return this status code
+    if you received an invalid response from the upstream server it accessed
+    in attempting to fulfill the request.
+    """
+
+    code = 502
+    description = (
+        "The proxy server received an invalid response from an upstream server."
+    )
+
+
+class ServiceUnavailable(_RetryAfter):
+    """*503* `Service Unavailable`
+
+    Status code you should return if a service is temporarily
+    unavailable.
+
+    :param retry_after: If given, set the ``Retry-After`` header to this
+        value. May be an :class:`int` number of seconds or a
+        :class:`~datetime.datetime`.
+
+    .. versionchanged:: 1.0
+        Added ``retry_after`` parameter.
+    """
+
+    code = 503
+    description = (
+        "The server is temporarily unable to service your request due"
+        " to maintenance downtime or capacity problems. Please try"
+        " again later."
+    )
+
+
+class GatewayTimeout(HTTPException):
+    """*504* `Gateway Timeout`
+
+    Status code you should return if a connection to an upstream server
+    times out.
+    """
+
+    code = 504
+    description = "The connection to an upstream server timed out."
+
+
+class HTTPVersionNotSupported(HTTPException):
+    """*505* `HTTP Version Not Supported`
+
+    The server does not support the HTTP protocol version used in the request.
+    """
+
+    code = 505
+    description = (
+        "The server does not support the HTTP protocol version used in the request."
+    )
+
+
+default_exceptions: t.Dict[int, t.Type[HTTPException]] = {}
+
+
+def _find_exceptions() -> None:
+    for obj in globals().values():
+        try:
+            is_http_exception = issubclass(obj, HTTPException)
+        except TypeError:
+            is_http_exception = False
+        if not is_http_exception or obj.code is None:
+            continue
+        old_obj = default_exceptions.get(obj.code, None)
+        if old_obj is not None and issubclass(obj, old_obj):
+            continue
+        default_exceptions[obj.code] = obj
+
+
+_find_exceptions()
+del _find_exceptions
+
+
+class Aborter:
+    """When passed a dict of code -> exception items it can be used as
+    callable that raises exceptions.  If the first argument to the
+    callable is an integer it will be looked up in the mapping, if it's
+    a WSGI application it will be raised in a proxy exception.
+
+    The rest of the arguments are forwarded to the exception constructor.
+    """
+
+    def __init__(
+        self,
+        mapping: t.Optional[t.Dict[int, t.Type[HTTPException]]] = None,
+        extra: t.Optional[t.Dict[int, t.Type[HTTPException]]] = None,
+    ) -> None:
+        if mapping is None:
+            mapping = default_exceptions
+        self.mapping = dict(mapping)
+        if extra is not None:
+            self.mapping.update(extra)
+
+    def __call__(
+        self, code: t.Union[int, "Response"], *args: t.Any, **kwargs: t.Any
+    ) -> "te.NoReturn":
+        from .sansio.response import Response
+
+        if isinstance(code, Response):
+            raise HTTPException(response=code)
+
+        if code not in self.mapping:
+            raise LookupError(f"no exception for {code!r}")
+
+        raise self.mapping[code](*args, **kwargs)
+
+
+def abort(
+    status: t.Union[int, "Response"], *args: t.Any, **kwargs: t.Any
+) -> "te.NoReturn":
+    """Raises an :py:exc:`HTTPException` for the given status code or WSGI
+    application.
+
+    If a status code is given, it will be looked up in the list of
+    exceptions and will raise that exception.  If passed a WSGI application,
+    it will wrap it in a proxy WSGI exception and raise that::
+
+       abort(404)  # 404 Not Found
+       abort(Response('Hello World'))
+
+    """
+    _aborter(status, *args, **kwargs)
+
+
+_aborter: Aborter = Aborter()
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/filesystem.py b/.venv/lib/python3.6/site-packages/werkzeug/filesystem.py
new file mode 100644
index 0000000..36a3d12
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/filesystem.py
@@ -0,0 +1,55 @@
+import codecs
+import sys
+import typing as t
+import warnings
+
+# We do not trust traditional unixes.
+has_likely_buggy_unicode_filesystem = (
+    sys.platform.startswith("linux") or "bsd" in sys.platform
+)
+
+
+def _is_ascii_encoding(encoding: t.Optional[str]) -> bool:
+    """Given an encoding this figures out if the encoding is actually ASCII (which
+    is something we don't actually want in most cases). This is necessary
+    because ASCII comes under many names such as ANSI_X3.4-1968.
+    """
+    if encoding is None:
+        return False
+    try:
+        return codecs.lookup(encoding).name == "ascii"
+    except LookupError:
+        return False
+
+
+class BrokenFilesystemWarning(RuntimeWarning, UnicodeWarning):
+    """The warning used by Werkzeug to signal a broken filesystem. Will only be
+    used once per runtime."""
+
+
+_warned_about_filesystem_encoding = False
+
+
+def get_filesystem_encoding() -> str:
+    """Returns the filesystem encoding that should be used. Note that this is
+    different from the Python understanding of the filesystem encoding which
+    might be deeply flawed. Do not use this value against Python's string APIs
+    because it might be different. See :ref:`filesystem-encoding` for the exact
+    behavior.
+
+    The concept of a filesystem encoding in generally is not something you
+    should rely on. As such if you ever need to use this function except for
+    writing wrapper code reconsider.
+    """
+    global _warned_about_filesystem_encoding
+    rv = sys.getfilesystemencoding()
+    if has_likely_buggy_unicode_filesystem and not rv or _is_ascii_encoding(rv):
+        if not _warned_about_filesystem_encoding:
+            warnings.warn(
+                "Detected a misconfigured UNIX filesystem: Will use"
+                f" UTF-8 as filesystem encoding instead of {rv!r}",
+                BrokenFilesystemWarning,
+            )
+            _warned_about_filesystem_encoding = True
+        return "utf-8"
+    return rv
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/formparser.py b/.venv/lib/python3.6/site-packages/werkzeug/formparser.py
new file mode 100644
index 0000000..6cb758f
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/formparser.py
@@ -0,0 +1,495 @@
+import typing as t
+import warnings
+from functools import update_wrapper
+from io import BytesIO
+from itertools import chain
+from typing import Union
+
+from . import exceptions
+from ._internal import _to_str
+from .datastructures import FileStorage
+from .datastructures import Headers
+from .datastructures import MultiDict
+from .http import parse_options_header
+from .sansio.multipart import Data
+from .sansio.multipart import Epilogue
+from .sansio.multipart import Field
+from .sansio.multipart import File
+from .sansio.multipart import MultipartDecoder
+from .sansio.multipart import NeedData
+from .urls import url_decode_stream
+from .wsgi import _make_chunk_iter
+from .wsgi import get_content_length
+from .wsgi import get_input_stream
+
+# there are some platforms where SpooledTemporaryFile is not available.
+# In that case we need to provide a fallback.
+try:
+    from tempfile import SpooledTemporaryFile
+except ImportError:
+    from tempfile import TemporaryFile
+
+    SpooledTemporaryFile = None  # type: ignore
+
+if t.TYPE_CHECKING:
+    import typing as te
+    from _typeshed.wsgi import WSGIEnvironment
+
+    t_parse_result = t.Tuple[t.IO[bytes], MultiDict, MultiDict]
+
+    class TStreamFactory(te.Protocol):
+        def __call__(
+            self,
+            total_content_length: t.Optional[int],
+            content_type: t.Optional[str],
+            filename: t.Optional[str],
+            content_length: t.Optional[int] = None,
+        ) -> t.IO[bytes]:
+            ...
+
+
+F = t.TypeVar("F", bound=t.Callable[..., t.Any])
+
+
+def _exhaust(stream: t.IO[bytes]) -> None:
+    bts = stream.read(64 * 1024)
+    while bts:
+        bts = stream.read(64 * 1024)
+
+
+def default_stream_factory(
+    total_content_length: t.Optional[int],
+    content_type: t.Optional[str],
+    filename: t.Optional[str],
+    content_length: t.Optional[int] = None,
+) -> t.IO[bytes]:
+    max_size = 1024 * 500
+
+    if SpooledTemporaryFile is not None:
+        return t.cast(t.IO[bytes], SpooledTemporaryFile(max_size=max_size, mode="rb+"))
+    elif total_content_length is None or total_content_length > max_size:
+        return t.cast(t.IO[bytes], TemporaryFile("rb+"))
+
+    return BytesIO()
+
+
+def parse_form_data(
+    environ: "WSGIEnvironment",
+    stream_factory: t.Optional["TStreamFactory"] = None,
+    charset: str = "utf-8",
+    errors: str = "replace",
+    max_form_memory_size: t.Optional[int] = None,
+    max_content_length: t.Optional[int] = None,
+    cls: t.Optional[t.Type[MultiDict]] = None,
+    silent: bool = True,
+) -> "t_parse_result":
+    """Parse the form data in the environ and return it as tuple in the form
+    ``(stream, form, files)``.  You should only call this method if the
+    transport method is `POST`, `PUT`, or `PATCH`.
+
+    If the mimetype of the data transmitted is `multipart/form-data` the
+    files multidict will be filled with `FileStorage` objects.  If the
+    mimetype is unknown the input stream is wrapped and returned as first
+    argument, else the stream is empty.
+
+    This is a shortcut for the common usage of :class:`FormDataParser`.
+
+    Have a look at :doc:`/request_data` for more details.
+
+    .. versionadded:: 0.5
+       The `max_form_memory_size`, `max_content_length` and
+       `cls` parameters were added.
+
+    .. versionadded:: 0.5.1
+       The optional `silent` flag was added.
+
+    :param environ: the WSGI environment to be used for parsing.
+    :param stream_factory: An optional callable that returns a new read and
+                           writeable file descriptor.  This callable works
+                           the same as :meth:`Response._get_file_stream`.
+    :param charset: The character set for URL and url encoded form data.
+    :param errors: The encoding error behavior.
+    :param max_form_memory_size: the maximum number of bytes to be accepted for
+                           in-memory stored form data.  If the data
+                           exceeds the value specified an
+                           :exc:`~exceptions.RequestEntityTooLarge`
+                           exception is raised.
+    :param max_content_length: If this is provided and the transmitted data
+                               is longer than this value an
+                               :exc:`~exceptions.RequestEntityTooLarge`
+                               exception is raised.
+    :param cls: an optional dict class to use.  If this is not specified
+                       or `None` the default :class:`MultiDict` is used.
+    :param silent: If set to False parsing errors will not be caught.
+    :return: A tuple in the form ``(stream, form, files)``.
+    """
+    return FormDataParser(
+        stream_factory,
+        charset,
+        errors,
+        max_form_memory_size,
+        max_content_length,
+        cls,
+        silent,
+    ).parse_from_environ(environ)
+
+
+def exhaust_stream(f: F) -> F:
+    """Helper decorator for methods that exhausts the stream on return."""
+
+    def wrapper(self, stream, *args, **kwargs):  # type: ignore
+        try:
+            return f(self, stream, *args, **kwargs)
+        finally:
+            exhaust = getattr(stream, "exhaust", None)
+
+            if exhaust is not None:
+                exhaust()
+            else:
+                while True:
+                    chunk = stream.read(1024 * 64)
+
+                    if not chunk:
+                        break
+
+    return update_wrapper(t.cast(F, wrapper), f)
+
+
+class FormDataParser:
+    """This class implements parsing of form data for Werkzeug.  By itself
+    it can parse multipart and url encoded form data.  It can be subclassed
+    and extended but for most mimetypes it is a better idea to use the
+    untouched stream and expose it as separate attributes on a request
+    object.
+
+    .. versionadded:: 0.8
+
+    :param stream_factory: An optional callable that returns a new read and
+                           writeable file descriptor.  This callable works
+                           the same as :meth:`Response._get_file_stream`.
+    :param charset: The character set for URL and url encoded form data.
+    :param errors: The encoding error behavior.
+    :param max_form_memory_size: the maximum number of bytes to be accepted for
+                           in-memory stored form data.  If the data
+                           exceeds the value specified an
+                           :exc:`~exceptions.RequestEntityTooLarge`
+                           exception is raised.
+    :param max_content_length: If this is provided and the transmitted data
+                               is longer than this value an
+                               :exc:`~exceptions.RequestEntityTooLarge`
+                               exception is raised.
+    :param cls: an optional dict class to use.  If this is not specified
+                       or `None` the default :class:`MultiDict` is used.
+    :param silent: If set to False parsing errors will not be caught.
+    """
+
+    def __init__(
+        self,
+        stream_factory: t.Optional["TStreamFactory"] = None,
+        charset: str = "utf-8",
+        errors: str = "replace",
+        max_form_memory_size: t.Optional[int] = None,
+        max_content_length: t.Optional[int] = None,
+        cls: t.Optional[t.Type[MultiDict]] = None,
+        silent: bool = True,
+    ) -> None:
+        if stream_factory is None:
+            stream_factory = default_stream_factory
+
+        self.stream_factory = stream_factory
+        self.charset = charset
+        self.errors = errors
+        self.max_form_memory_size = max_form_memory_size
+        self.max_content_length = max_content_length
+
+        if cls is None:
+            cls = MultiDict
+
+        self.cls = cls
+        self.silent = silent
+
+    def get_parse_func(
+        self, mimetype: str, options: t.Dict[str, str]
+    ) -> t.Optional[
+        t.Callable[
+            ["FormDataParser", t.IO[bytes], str, t.Optional[int], t.Dict[str, str]],
+            "t_parse_result",
+        ]
+    ]:
+        return self.parse_functions.get(mimetype)
+
+    def parse_from_environ(self, environ: "WSGIEnvironment") -> "t_parse_result":
+        """Parses the information from the environment as form data.
+
+        :param environ: the WSGI environment to be used for parsing.
+        :return: A tuple in the form ``(stream, form, files)``.
+        """
+        content_type = environ.get("CONTENT_TYPE", "")
+        content_length = get_content_length(environ)
+        mimetype, options = parse_options_header(content_type)
+        return self.parse(get_input_stream(environ), mimetype, content_length, options)
+
+    def parse(
+        self,
+        stream: t.IO[bytes],
+        mimetype: str,
+        content_length: t.Optional[int],
+        options: t.Optional[t.Dict[str, str]] = None,
+    ) -> "t_parse_result":
+        """Parses the information from the given stream, mimetype,
+        content length and mimetype parameters.
+
+        :param stream: an input stream
+        :param mimetype: the mimetype of the data
+        :param content_length: the content length of the incoming data
+        :param options: optional mimetype parameters (used for
+                        the multipart boundary for instance)
+        :return: A tuple in the form ``(stream, form, files)``.
+        """
+        if (
+            self.max_content_length is not None
+            and content_length is not None
+            and content_length > self.max_content_length
+        ):
+            # if the input stream is not exhausted, firefox reports Connection Reset
+            _exhaust(stream)
+            raise exceptions.RequestEntityTooLarge()
+
+        if options is None:
+            options = {}
+
+        parse_func = self.get_parse_func(mimetype, options)
+
+        if parse_func is not None:
+            try:
+                return parse_func(self, stream, mimetype, content_length, options)
+            except ValueError:
+                if not self.silent:
+                    raise
+
+        return stream, self.cls(), self.cls()
+
+    @exhaust_stream
+    def _parse_multipart(
+        self,
+        stream: t.IO[bytes],
+        mimetype: str,
+        content_length: t.Optional[int],
+        options: t.Dict[str, str],
+    ) -> "t_parse_result":
+        parser = MultiPartParser(
+            self.stream_factory,
+            self.charset,
+            self.errors,
+            max_form_memory_size=self.max_form_memory_size,
+            cls=self.cls,
+        )
+        boundary = options.get("boundary", "").encode("ascii")
+
+        if not boundary:
+            raise ValueError("Missing boundary")
+
+        form, files = parser.parse(stream, boundary, content_length)
+        return stream, form, files
+
+    @exhaust_stream
+    def _parse_urlencoded(
+        self,
+        stream: t.IO[bytes],
+        mimetype: str,
+        content_length: t.Optional[int],
+        options: t.Dict[str, str],
+    ) -> "t_parse_result":
+        if (
+            self.max_form_memory_size is not None
+            and content_length is not None
+            and content_length > self.max_form_memory_size
+        ):
+            # if the input stream is not exhausted, firefox reports Connection Reset
+            _exhaust(stream)
+            raise exceptions.RequestEntityTooLarge()
+
+        form = url_decode_stream(stream, self.charset, errors=self.errors, cls=self.cls)
+        return stream, form, self.cls()
+
+    #: mapping of mimetypes to parsing functions
+    parse_functions: t.Dict[
+        str,
+        t.Callable[
+            ["FormDataParser", t.IO[bytes], str, t.Optional[int], t.Dict[str, str]],
+            "t_parse_result",
+        ],
+    ] = {
+        "multipart/form-data": _parse_multipart,
+        "application/x-www-form-urlencoded": _parse_urlencoded,
+        "application/x-url-encoded": _parse_urlencoded,
+    }
+
+
+def _line_parse(line: str) -> t.Tuple[str, bool]:
+    """Removes line ending characters and returns a tuple (`stripped_line`,
+    `is_terminated`).
+    """
+    if line[-2:] == "\r\n":
+        return line[:-2], True
+
+    elif line[-1:] in {"\r", "\n"}:
+        return line[:-1], True
+
+    return line, False
+
+
+def parse_multipart_headers(iterable: t.Iterable[bytes]) -> Headers:
+    """Parses multipart headers from an iterable that yields lines (including
+    the trailing newline symbol).  The iterable has to be newline terminated.
+    The iterable will stop at the line where the headers ended so it can be
+    further consumed.
+    :param iterable: iterable of strings that are newline terminated
+    """
+    warnings.warn(
+        "'parse_multipart_headers' is deprecated and will be removed in"
+        " Werkzeug 2.1.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    result: t.List[t.Tuple[str, str]] = []
+
+    for b_line in iterable:
+        line = _to_str(b_line)
+        line, line_terminated = _line_parse(line)
+
+        if not line_terminated:
+            raise ValueError("unexpected end of line in multipart header")
+
+        if not line:
+            break
+        elif line[0] in " \t" and result:
+            key, value = result[-1]
+            result[-1] = (key, f"{value}\n {line[1:]}")
+        else:
+            parts = line.split(":", 1)
+
+            if len(parts) == 2:
+                result.append((parts[0].strip(), parts[1].strip()))
+
+    # we link the list to the headers, no need to create a copy, the
+    # list was not shared anyways.
+    return Headers(result)
+
+
+class MultiPartParser:
+    def __init__(
+        self,
+        stream_factory: t.Optional["TStreamFactory"] = None,
+        charset: str = "utf-8",
+        errors: str = "replace",
+        max_form_memory_size: t.Optional[int] = None,
+        cls: t.Optional[t.Type[MultiDict]] = None,
+        buffer_size: int = 64 * 1024,
+    ) -> None:
+        self.charset = charset
+        self.errors = errors
+        self.max_form_memory_size = max_form_memory_size
+
+        if stream_factory is None:
+            stream_factory = default_stream_factory
+
+        self.stream_factory = stream_factory
+
+        if cls is None:
+            cls = MultiDict
+
+        self.cls = cls
+
+        self.buffer_size = buffer_size
+
+    def fail(self, message: str) -> "te.NoReturn":
+        raise ValueError(message)
+
+    def get_part_charset(self, headers: Headers) -> str:
+        # Figure out input charset for current part
+        content_type = headers.get("content-type")
+
+        if content_type:
+            mimetype, ct_params = parse_options_header(content_type)
+            return ct_params.get("charset", self.charset)
+
+        return self.charset
+
+    def start_file_streaming(
+        self, event: File, total_content_length: t.Optional[int]
+    ) -> t.IO[bytes]:
+        content_type = event.headers.get("content-type")
+
+        try:
+            content_length = int(event.headers["content-length"])
+        except (KeyError, ValueError):
+            content_length = 0
+
+        container = self.stream_factory(
+            total_content_length=total_content_length,
+            filename=event.filename,
+            content_type=content_type,
+            content_length=content_length,
+        )
+        return container
+
+    def parse(
+        self, stream: t.IO[bytes], boundary: bytes, content_length: t.Optional[int]
+    ) -> t.Tuple[MultiDict, MultiDict]:
+        container: t.Union[t.IO[bytes], t.List[bytes]]
+        _write: t.Callable[[bytes], t.Any]
+
+        iterator = chain(
+            _make_chunk_iter(
+                stream,
+                limit=content_length,
+                buffer_size=self.buffer_size,
+            ),
+            [None],
+        )
+
+        parser = MultipartDecoder(boundary, self.max_form_memory_size)
+
+        fields = []
+        files = []
+
+        current_part: Union[Field, File]
+        for data in iterator:
+            parser.receive_data(data)
+            event = parser.next_event()
+            while not isinstance(event, (Epilogue, NeedData)):
+                if isinstance(event, Field):
+                    current_part = event
+                    container = []
+                    _write = container.append
+                elif isinstance(event, File):
+                    current_part = event
+                    container = self.start_file_streaming(event, content_length)
+                    _write = container.write
+                elif isinstance(event, Data):
+                    _write(event.data)
+                    if not event.more_data:
+                        if isinstance(current_part, Field):
+                            value = b"".join(container).decode(
+                                self.get_part_charset(current_part.headers), self.errors
+                            )
+                            fields.append((current_part.name, value))
+                        else:
+                            container = t.cast(t.IO[bytes], container)
+                            container.seek(0)
+                            files.append(
+                                (
+                                    current_part.name,
+                                    FileStorage(
+                                        container,
+                                        current_part.filename,
+                                        current_part.name,
+                                        headers=current_part.headers,
+                                    ),
+                                )
+                            )
+
+                event = parser.next_event()
+
+        return self.cls(fields), self.cls(files)
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/http.py b/.venv/lib/python3.6/site-packages/werkzeug/http.py
new file mode 100644
index 0000000..ca48fe2
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/http.py
@@ -0,0 +1,1388 @@
+import base64
+import email.utils
+import re
+import typing
+import typing as t
+import warnings
+from datetime import date
+from datetime import datetime
+from datetime import time
+from datetime import timedelta
+from datetime import timezone
+from enum import Enum
+from hashlib import sha1
+from time import mktime
+from time import struct_time
+from urllib.parse import unquote_to_bytes as _unquote
+from urllib.request import parse_http_list as _parse_list_header
+
+from ._internal import _cookie_parse_impl
+from ._internal import _cookie_quote
+from ._internal import _make_cookie_domain
+from ._internal import _to_bytes
+from ._internal import _to_str
+from ._internal import _wsgi_decoding_dance
+from werkzeug._internal import _dt_as_utc
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from _typeshed.wsgi import WSGIEnvironment
+
+# for explanation of "media-range", etc. see Sections 5.3.{1,2} of RFC 7231
+_accept_re = re.compile(
+    r"""
+    (                       # media-range capturing-parenthesis
+      [^\s;,]+              # type/subtype
+      (?:[ \t]*;[ \t]*      # ";"
+        (?:                 # parameter non-capturing-parenthesis
+          [^\s;,q][^\s;,]*  # token that doesn't start with "q"
+        |                   # or
+          q[^\s;,=][^\s;,]* # token that is more than just "q"
+        )
+      )*                    # zero or more parameters
+    )                       # end of media-range
+    (?:[ \t]*;[ \t]*q=      # weight is a "q" parameter
+      (\d*(?:\.\d+)?)       # qvalue capturing-parentheses
+      [^,]*                 # "extension" accept params: who cares?
+    )?                      # accept params are optional
+    """,
+    re.VERBOSE,
+)
+_token_chars = frozenset(
+    "!#$%&'*+-.0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ^_`abcdefghijklmnopqrstuvwxyz|~"
+)
+_etag_re = re.compile(r'([Ww]/)?(?:"(.*?)"|(.*?))(?:\s*,\s*|$)')
+_option_header_piece_re = re.compile(
+    r"""
+    ;\s*,?\s*  # newlines were replaced with commas
+    (?P
+        "[^"\\]*(?:\\.[^"\\]*)*"  # quoted string
+    |
+        [^\s;,=*]+  # token
+    )
+    (?:\*(?P\d+))?  # *1, optional continuation index
+    \s*
+    (?:  # optionally followed by =value
+        (?:  # equals sign, possibly with encoding
+            \*\s*=\s*  # * indicates extended notation
+            (?:  # optional encoding
+                (?P[^\s]+?)
+                '(?P[^\s]*?)'
+            )?
+        |
+            =\s*  # basic notation
+        )
+        (?P
+            "[^"\\]*(?:\\.[^"\\]*)*"  # quoted string
+        |
+            [^;,]+  # token
+        )?
+    )?
+    \s*
+    """,
+    flags=re.VERBOSE,
+)
+_option_header_start_mime_type = re.compile(r",\s*([^;,\s]+)([;,]\s*.+)?")
+_entity_headers = frozenset(
+    [
+        "allow",
+        "content-encoding",
+        "content-language",
+        "content-length",
+        "content-location",
+        "content-md5",
+        "content-range",
+        "content-type",
+        "expires",
+        "last-modified",
+    ]
+)
+_hop_by_hop_headers = frozenset(
+    [
+        "connection",
+        "keep-alive",
+        "proxy-authenticate",
+        "proxy-authorization",
+        "te",
+        "trailer",
+        "transfer-encoding",
+        "upgrade",
+    ]
+)
+HTTP_STATUS_CODES = {
+    100: "Continue",
+    101: "Switching Protocols",
+    102: "Processing",
+    103: "Early Hints",  # see RFC 8297
+    200: "OK",
+    201: "Created",
+    202: "Accepted",
+    203: "Non Authoritative Information",
+    204: "No Content",
+    205: "Reset Content",
+    206: "Partial Content",
+    207: "Multi Status",
+    208: "Already Reported",  # see RFC 5842
+    226: "IM Used",  # see RFC 3229
+    300: "Multiple Choices",
+    301: "Moved Permanently",
+    302: "Found",
+    303: "See Other",
+    304: "Not Modified",
+    305: "Use Proxy",
+    306: "Switch Proxy",  # unused
+    307: "Temporary Redirect",
+    308: "Permanent Redirect",
+    400: "Bad Request",
+    401: "Unauthorized",
+    402: "Payment Required",  # unused
+    403: "Forbidden",
+    404: "Not Found",
+    405: "Method Not Allowed",
+    406: "Not Acceptable",
+    407: "Proxy Authentication Required",
+    408: "Request Timeout",
+    409: "Conflict",
+    410: "Gone",
+    411: "Length Required",
+    412: "Precondition Failed",
+    413: "Request Entity Too Large",
+    414: "Request URI Too Long",
+    415: "Unsupported Media Type",
+    416: "Requested Range Not Satisfiable",
+    417: "Expectation Failed",
+    418: "I'm a teapot",  # see RFC 2324
+    421: "Misdirected Request",  # see RFC 7540
+    422: "Unprocessable Entity",
+    423: "Locked",
+    424: "Failed Dependency",
+    425: "Too Early",  # see RFC 8470
+    426: "Upgrade Required",
+    428: "Precondition Required",  # see RFC 6585
+    429: "Too Many Requests",
+    431: "Request Header Fields Too Large",
+    449: "Retry With",  # proprietary MS extension
+    451: "Unavailable For Legal Reasons",
+    500: "Internal Server Error",
+    501: "Not Implemented",
+    502: "Bad Gateway",
+    503: "Service Unavailable",
+    504: "Gateway Timeout",
+    505: "HTTP Version Not Supported",
+    506: "Variant Also Negotiates",  # see RFC 2295
+    507: "Insufficient Storage",
+    508: "Loop Detected",  # see RFC 5842
+    510: "Not Extended",
+    511: "Network Authentication Failed",
+}
+
+
+class COEP(Enum):
+    """Cross Origin Embedder Policies"""
+
+    UNSAFE_NONE = "unsafe-none"
+    REQUIRE_CORP = "require-corp"
+
+
+class COOP(Enum):
+    """Cross Origin Opener Policies"""
+
+    UNSAFE_NONE = "unsafe-none"
+    SAME_ORIGIN_ALLOW_POPUPS = "same-origin-allow-popups"
+    SAME_ORIGIN = "same-origin"
+
+
+def quote_header_value(
+    value: t.Union[str, int], extra_chars: str = "", allow_token: bool = True
+) -> str:
+    """Quote a header value if necessary.
+
+    .. versionadded:: 0.5
+
+    :param value: the value to quote.
+    :param extra_chars: a list of extra characters to skip quoting.
+    :param allow_token: if this is enabled token values are returned
+                        unchanged.
+    """
+    if isinstance(value, bytes):
+        value = value.decode("latin1")
+    value = str(value)
+    if allow_token:
+        token_chars = _token_chars | set(extra_chars)
+        if set(value).issubset(token_chars):
+            return value
+    value = value.replace("\\", "\\\\").replace('"', '\\"')
+    return f'"{value}"'
+
+
+def unquote_header_value(value: str, is_filename: bool = False) -> str:
+    r"""Unquotes a header value.  (Reversal of :func:`quote_header_value`).
+    This does not use the real unquoting but what browsers are actually
+    using for quoting.
+
+    .. versionadded:: 0.5
+
+    :param value: the header value to unquote.
+    :param is_filename: The value represents a filename or path.
+    """
+    if value and value[0] == value[-1] == '"':
+        # this is not the real unquoting, but fixing this so that the
+        # RFC is met will result in bugs with internet explorer and
+        # probably some other browsers as well.  IE for example is
+        # uploading files with "C:\foo\bar.txt" as filename
+        value = value[1:-1]
+
+        # if this is a filename and the starting characters look like
+        # a UNC path, then just return the value without quotes.  Using the
+        # replace sequence below on a UNC path has the effect of turning
+        # the leading double slash into a single slash and then
+        # _fix_ie_filename() doesn't work correctly.  See #458.
+        if not is_filename or value[:2] != "\\\\":
+            return value.replace("\\\\", "\\").replace('\\"', '"')
+    return value
+
+
+def dump_options_header(
+    header: t.Optional[str], options: t.Mapping[str, t.Optional[t.Union[str, int]]]
+) -> str:
+    """The reverse function to :func:`parse_options_header`.
+
+    :param header: the header to dump
+    :param options: a dict of options to append.
+    """
+    segments = []
+    if header is not None:
+        segments.append(header)
+    for key, value in options.items():
+        if value is None:
+            segments.append(key)
+        else:
+            segments.append(f"{key}={quote_header_value(value)}")
+    return "; ".join(segments)
+
+
+def dump_header(
+    iterable: t.Union[t.Dict[str, t.Union[str, int]], t.Iterable[str]],
+    allow_token: bool = True,
+) -> str:
+    """Dump an HTTP header again.  This is the reversal of
+    :func:`parse_list_header`, :func:`parse_set_header` and
+    :func:`parse_dict_header`.  This also quotes strings that include an
+    equals sign unless you pass it as dict of key, value pairs.
+
+    >>> dump_header({'foo': 'bar baz'})
+    'foo="bar baz"'
+    >>> dump_header(('foo', 'bar baz'))
+    'foo, "bar baz"'
+
+    :param iterable: the iterable or dict of values to quote.
+    :param allow_token: if set to `False` tokens as values are disallowed.
+                        See :func:`quote_header_value` for more details.
+    """
+    if isinstance(iterable, dict):
+        items = []
+        for key, value in iterable.items():
+            if value is None:
+                items.append(key)
+            else:
+                items.append(
+                    f"{key}={quote_header_value(value, allow_token=allow_token)}"
+                )
+    else:
+        items = [quote_header_value(x, allow_token=allow_token) for x in iterable]
+    return ", ".join(items)
+
+
+def dump_csp_header(header: "ds.ContentSecurityPolicy") -> str:
+    """Dump a Content Security Policy header.
+
+    These are structured into policies such as "default-src 'self';
+    script-src 'self'".
+
+    .. versionadded:: 1.0.0
+       Support for Content Security Policy headers was added.
+
+    """
+    return "; ".join(f"{key} {value}" for key, value in header.items())
+
+
+def parse_list_header(value: str) -> t.List[str]:
+    """Parse lists as described by RFC 2068 Section 2.
+
+    In particular, parse comma-separated lists where the elements of
+    the list may include quoted-strings.  A quoted-string could
+    contain a comma.  A non-quoted string could have quotes in the
+    middle.  Quotes are removed automatically after parsing.
+
+    It basically works like :func:`parse_set_header` just that items
+    may appear multiple times and case sensitivity is preserved.
+
+    The return value is a standard :class:`list`:
+
+    >>> parse_list_header('token, "quoted value"')
+    ['token', 'quoted value']
+
+    To create a header from the :class:`list` again, use the
+    :func:`dump_header` function.
+
+    :param value: a string with a list header.
+    :return: :class:`list`
+    """
+    result = []
+    for item in _parse_list_header(value):
+        if item[:1] == item[-1:] == '"':
+            item = unquote_header_value(item[1:-1])
+        result.append(item)
+    return result
+
+
+def parse_dict_header(value: str, cls: t.Type[dict] = dict) -> t.Dict[str, str]:
+    """Parse lists of key, value pairs as described by RFC 2068 Section 2 and
+    convert them into a python dict (or any other mapping object created from
+    the type with a dict like interface provided by the `cls` argument):
+
+    >>> d = parse_dict_header('foo="is a fish", bar="as well"')
+    >>> type(d) is dict
+    True
+    >>> sorted(d.items())
+    [('bar', 'as well'), ('foo', 'is a fish')]
+
+    If there is no value for a key it will be `None`:
+
+    >>> parse_dict_header('key_without_value')
+    {'key_without_value': None}
+
+    To create a header from the :class:`dict` again, use the
+    :func:`dump_header` function.
+
+    .. versionchanged:: 0.9
+       Added support for `cls` argument.
+
+    :param value: a string with a dict header.
+    :param cls: callable to use for storage of parsed results.
+    :return: an instance of `cls`
+    """
+    result = cls()
+    if isinstance(value, bytes):
+        value = value.decode("latin1")
+    for item in _parse_list_header(value):
+        if "=" not in item:
+            result[item] = None
+            continue
+        name, value = item.split("=", 1)
+        if value[:1] == value[-1:] == '"':
+            value = unquote_header_value(value[1:-1])
+        result[name] = value
+    return result
+
+
+@typing.overload
+def parse_options_header(
+    value: t.Optional[str], multiple: "te.Literal[False]" = False
+) -> t.Tuple[str, t.Dict[str, str]]:
+    ...
+
+
+@typing.overload
+def parse_options_header(
+    value: t.Optional[str], multiple: "te.Literal[True]"
+) -> t.Tuple[t.Any, ...]:
+    ...
+
+
+def parse_options_header(
+    value: t.Optional[str], multiple: bool = False
+) -> t.Union[t.Tuple[str, t.Dict[str, str]], t.Tuple[t.Any, ...]]:
+    """Parse a ``Content-Type`` like header into a tuple with the content
+    type and the options:
+
+    >>> parse_options_header('text/html; charset=utf8')
+    ('text/html', {'charset': 'utf8'})
+
+    This should not be used to parse ``Cache-Control`` like headers that use
+    a slightly different format.  For these headers use the
+    :func:`parse_dict_header` function.
+
+    .. versionchanged:: 0.15
+        :rfc:`2231` parameter continuations are handled.
+
+    .. versionadded:: 0.5
+
+    :param value: the header to parse.
+    :param multiple: Whether try to parse and return multiple MIME types
+    :return: (mimetype, options) or (mimetype, options, mimetype, options, …)
+             if multiple=True
+    """
+    if not value:
+        return "", {}
+
+    result: t.List[t.Any] = []
+
+    value = "," + value.replace("\n", ",")
+    while value:
+        match = _option_header_start_mime_type.match(value)
+        if not match:
+            break
+        result.append(match.group(1))  # mimetype
+        options: t.Dict[str, str] = {}
+        # Parse options
+        rest = match.group(2)
+        encoding: t.Optional[str]
+        continued_encoding: t.Optional[str] = None
+        while rest:
+            optmatch = _option_header_piece_re.match(rest)
+            if not optmatch:
+                break
+            option, count, encoding, language, option_value = optmatch.groups()
+            # Continuations don't have to supply the encoding after the
+            # first line. If we're in a continuation, track the current
+            # encoding to use for subsequent lines. Reset it when the
+            # continuation ends.
+            if not count:
+                continued_encoding = None
+            else:
+                if not encoding:
+                    encoding = continued_encoding
+                continued_encoding = encoding
+            option = unquote_header_value(option)
+            if option_value is not None:
+                option_value = unquote_header_value(option_value, option == "filename")
+                if encoding is not None:
+                    option_value = _unquote(option_value).decode(encoding)
+            if count:
+                # Continuations append to the existing value. For
+                # simplicity, this ignores the possibility of
+                # out-of-order indices, which shouldn't happen anyway.
+                options[option] = options.get(option, "") + option_value
+            else:
+                options[option] = option_value
+            rest = rest[optmatch.end() :]
+        result.append(options)
+        if multiple is False:
+            return tuple(result)
+        value = rest
+
+    return tuple(result) if result else ("", {})
+
+
+_TAnyAccept = t.TypeVar("_TAnyAccept", bound="ds.Accept")
+
+
+@typing.overload
+def parse_accept_header(value: t.Optional[str]) -> "ds.Accept":
+    ...
+
+
+@typing.overload
+def parse_accept_header(
+    value: t.Optional[str], cls: t.Type[_TAnyAccept]
+) -> _TAnyAccept:
+    ...
+
+
+def parse_accept_header(
+    value: t.Optional[str], cls: t.Optional[t.Type[_TAnyAccept]] = None
+) -> _TAnyAccept:
+    """Parses an HTTP Accept-* header.  This does not implement a complete
+    valid algorithm but one that supports at least value and quality
+    extraction.
+
+    Returns a new :class:`Accept` object (basically a list of ``(value, quality)``
+    tuples sorted by the quality with some additional accessor methods).
+
+    The second parameter can be a subclass of :class:`Accept` that is created
+    with the parsed values and returned.
+
+    :param value: the accept header string to be parsed.
+    :param cls: the wrapper class for the return value (can be
+                         :class:`Accept` or a subclass thereof)
+    :return: an instance of `cls`.
+    """
+    if cls is None:
+        cls = t.cast(t.Type[_TAnyAccept], ds.Accept)
+
+    if not value:
+        return cls(None)
+
+    result = []
+    for match in _accept_re.finditer(value):
+        quality_match = match.group(2)
+        if not quality_match:
+            quality: float = 1
+        else:
+            quality = max(min(float(quality_match), 1), 0)
+        result.append((match.group(1), quality))
+    return cls(result)
+
+
+_TAnyCC = t.TypeVar("_TAnyCC", bound="ds._CacheControl")
+_t_cc_update = t.Optional[t.Callable[[_TAnyCC], None]]
+
+
+@typing.overload
+def parse_cache_control_header(
+    value: t.Optional[str], on_update: _t_cc_update, cls: None = None
+) -> "ds.RequestCacheControl":
+    ...
+
+
+@typing.overload
+def parse_cache_control_header(
+    value: t.Optional[str], on_update: _t_cc_update, cls: t.Type[_TAnyCC]
+) -> _TAnyCC:
+    ...
+
+
+def parse_cache_control_header(
+    value: t.Optional[str],
+    on_update: _t_cc_update = None,
+    cls: t.Optional[t.Type[_TAnyCC]] = None,
+) -> _TAnyCC:
+    """Parse a cache control header.  The RFC differs between response and
+    request cache control, this method does not.  It's your responsibility
+    to not use the wrong control statements.
+
+    .. versionadded:: 0.5
+       The `cls` was added.  If not specified an immutable
+       :class:`~werkzeug.datastructures.RequestCacheControl` is returned.
+
+    :param value: a cache control header to be parsed.
+    :param on_update: an optional callable that is called every time a value
+                      on the :class:`~werkzeug.datastructures.CacheControl`
+                      object is changed.
+    :param cls: the class for the returned object.  By default
+                :class:`~werkzeug.datastructures.RequestCacheControl` is used.
+    :return: a `cls` object.
+    """
+    if cls is None:
+        cls = t.cast(t.Type[_TAnyCC], ds.RequestCacheControl)
+
+    if not value:
+        return cls((), on_update)
+
+    return cls(parse_dict_header(value), on_update)
+
+
+_TAnyCSP = t.TypeVar("_TAnyCSP", bound="ds.ContentSecurityPolicy")
+_t_csp_update = t.Optional[t.Callable[[_TAnyCSP], None]]
+
+
+@typing.overload
+def parse_csp_header(
+    value: t.Optional[str], on_update: _t_csp_update, cls: None = None
+) -> "ds.ContentSecurityPolicy":
+    ...
+
+
+@typing.overload
+def parse_csp_header(
+    value: t.Optional[str], on_update: _t_csp_update, cls: t.Type[_TAnyCSP]
+) -> _TAnyCSP:
+    ...
+
+
+def parse_csp_header(
+    value: t.Optional[str],
+    on_update: _t_csp_update = None,
+    cls: t.Optional[t.Type[_TAnyCSP]] = None,
+) -> _TAnyCSP:
+    """Parse a Content Security Policy header.
+
+    .. versionadded:: 1.0.0
+       Support for Content Security Policy headers was added.
+
+    :param value: a csp header to be parsed.
+    :param on_update: an optional callable that is called every time a value
+                      on the object is changed.
+    :param cls: the class for the returned object.  By default
+                :class:`~werkzeug.datastructures.ContentSecurityPolicy` is used.
+    :return: a `cls` object.
+    """
+    if cls is None:
+        cls = t.cast(t.Type[_TAnyCSP], ds.ContentSecurityPolicy)
+
+    if value is None:
+        return cls((), on_update)
+
+    items = []
+
+    for policy in value.split(";"):
+        policy = policy.strip()
+
+        # Ignore badly formatted policies (no space)
+        if " " in policy:
+            directive, value = policy.strip().split(" ", 1)
+            items.append((directive.strip(), value.strip()))
+
+    return cls(items, on_update)
+
+
+def parse_set_header(
+    value: t.Optional[str],
+    on_update: t.Optional[t.Callable[["ds.HeaderSet"], None]] = None,
+) -> "ds.HeaderSet":
+    """Parse a set-like header and return a
+    :class:`~werkzeug.datastructures.HeaderSet` object:
+
+    >>> hs = parse_set_header('token, "quoted value"')
+
+    The return value is an object that treats the items case-insensitively
+    and keeps the order of the items:
+
+    >>> 'TOKEN' in hs
+    True
+    >>> hs.index('quoted value')
+    1
+    >>> hs
+    HeaderSet(['token', 'quoted value'])
+
+    To create a header from the :class:`HeaderSet` again, use the
+    :func:`dump_header` function.
+
+    :param value: a set header to be parsed.
+    :param on_update: an optional callable that is called every time a
+                      value on the :class:`~werkzeug.datastructures.HeaderSet`
+                      object is changed.
+    :return: a :class:`~werkzeug.datastructures.HeaderSet`
+    """
+    if not value:
+        return ds.HeaderSet(None, on_update)
+    return ds.HeaderSet(parse_list_header(value), on_update)
+
+
+def parse_authorization_header(
+    value: t.Optional[str],
+) -> t.Optional["ds.Authorization"]:
+    """Parse an HTTP basic/digest authorization header transmitted by the web
+    browser.  The return value is either `None` if the header was invalid or
+    not given, otherwise an :class:`~werkzeug.datastructures.Authorization`
+    object.
+
+    :param value: the authorization header to parse.
+    :return: a :class:`~werkzeug.datastructures.Authorization` object or `None`.
+    """
+    if not value:
+        return None
+    value = _wsgi_decoding_dance(value)
+    try:
+        auth_type, auth_info = value.split(None, 1)
+        auth_type = auth_type.lower()
+    except ValueError:
+        return None
+    if auth_type == "basic":
+        try:
+            username, password = base64.b64decode(auth_info).split(b":", 1)
+        except Exception:
+            return None
+        try:
+            return ds.Authorization(
+                "basic",
+                {
+                    "username": _to_str(username, "utf-8"),
+                    "password": _to_str(password, "utf-8"),
+                },
+            )
+        except UnicodeDecodeError:
+            return None
+    elif auth_type == "digest":
+        auth_map = parse_dict_header(auth_info)
+        for key in "username", "realm", "nonce", "uri", "response":
+            if key not in auth_map:
+                return None
+        if "qop" in auth_map:
+            if not auth_map.get("nc") or not auth_map.get("cnonce"):
+                return None
+        return ds.Authorization("digest", auth_map)
+    return None
+
+
+def parse_www_authenticate_header(
+    value: t.Optional[str],
+    on_update: t.Optional[t.Callable[["ds.WWWAuthenticate"], None]] = None,
+) -> "ds.WWWAuthenticate":
+    """Parse an HTTP WWW-Authenticate header into a
+    :class:`~werkzeug.datastructures.WWWAuthenticate` object.
+
+    :param value: a WWW-Authenticate header to parse.
+    :param on_update: an optional callable that is called every time a value
+                      on the :class:`~werkzeug.datastructures.WWWAuthenticate`
+                      object is changed.
+    :return: a :class:`~werkzeug.datastructures.WWWAuthenticate` object.
+    """
+    if not value:
+        return ds.WWWAuthenticate(on_update=on_update)
+    try:
+        auth_type, auth_info = value.split(None, 1)
+        auth_type = auth_type.lower()
+    except (ValueError, AttributeError):
+        return ds.WWWAuthenticate(value.strip().lower(), on_update=on_update)
+    return ds.WWWAuthenticate(auth_type, parse_dict_header(auth_info), on_update)
+
+
+def parse_if_range_header(value: t.Optional[str]) -> "ds.IfRange":
+    """Parses an if-range header which can be an etag or a date.  Returns
+    a :class:`~werkzeug.datastructures.IfRange` object.
+
+    .. versionchanged:: 2.0
+        If the value represents a datetime, it is timezone-aware.
+
+    .. versionadded:: 0.7
+    """
+    if not value:
+        return ds.IfRange()
+    date = parse_date(value)
+    if date is not None:
+        return ds.IfRange(date=date)
+    # drop weakness information
+    return ds.IfRange(unquote_etag(value)[0])
+
+
+def parse_range_header(
+    value: t.Optional[str], make_inclusive: bool = True
+) -> t.Optional["ds.Range"]:
+    """Parses a range header into a :class:`~werkzeug.datastructures.Range`
+    object.  If the header is missing or malformed `None` is returned.
+    `ranges` is a list of ``(start, stop)`` tuples where the ranges are
+    non-inclusive.
+
+    .. versionadded:: 0.7
+    """
+    if not value or "=" not in value:
+        return None
+
+    ranges = []
+    last_end = 0
+    units, rng = value.split("=", 1)
+    units = units.strip().lower()
+
+    for item in rng.split(","):
+        item = item.strip()
+        if "-" not in item:
+            return None
+        if item.startswith("-"):
+            if last_end < 0:
+                return None
+            try:
+                begin = int(item)
+            except ValueError:
+                return None
+            end = None
+            last_end = -1
+        elif "-" in item:
+            begin_str, end_str = item.split("-", 1)
+            begin_str = begin_str.strip()
+            end_str = end_str.strip()
+            if not begin_str.isdigit():
+                return None
+            begin = int(begin_str)
+            if begin < last_end or last_end < 0:
+                return None
+            if end_str:
+                if not end_str.isdigit():
+                    return None
+                end = int(end_str) + 1
+                if begin >= end:
+                    return None
+            else:
+                end = None
+            last_end = end if end is not None else -1
+        ranges.append((begin, end))
+
+    return ds.Range(units, ranges)
+
+
+def parse_content_range_header(
+    value: t.Optional[str],
+    on_update: t.Optional[t.Callable[["ds.ContentRange"], None]] = None,
+) -> t.Optional["ds.ContentRange"]:
+    """Parses a range header into a
+    :class:`~werkzeug.datastructures.ContentRange` object or `None` if
+    parsing is not possible.
+
+    .. versionadded:: 0.7
+
+    :param value: a content range header to be parsed.
+    :param on_update: an optional callable that is called every time a value
+                      on the :class:`~werkzeug.datastructures.ContentRange`
+                      object is changed.
+    """
+    if value is None:
+        return None
+    try:
+        units, rangedef = (value or "").strip().split(None, 1)
+    except ValueError:
+        return None
+
+    if "/" not in rangedef:
+        return None
+    rng, length_str = rangedef.split("/", 1)
+    if length_str == "*":
+        length = None
+    elif length_str.isdigit():
+        length = int(length_str)
+    else:
+        return None
+
+    if rng == "*":
+        return ds.ContentRange(units, None, None, length, on_update=on_update)
+    elif "-" not in rng:
+        return None
+
+    start_str, stop_str = rng.split("-", 1)
+    try:
+        start = int(start_str)
+        stop = int(stop_str) + 1
+    except ValueError:
+        return None
+
+    if is_byte_range_valid(start, stop, length):
+        return ds.ContentRange(units, start, stop, length, on_update=on_update)
+
+    return None
+
+
+def quote_etag(etag: str, weak: bool = False) -> str:
+    """Quote an etag.
+
+    :param etag: the etag to quote.
+    :param weak: set to `True` to tag it "weak".
+    """
+    if '"' in etag:
+        raise ValueError("invalid etag")
+    etag = f'"{etag}"'
+    if weak:
+        etag = f"W/{etag}"
+    return etag
+
+
+def unquote_etag(
+    etag: t.Optional[str],
+) -> t.Union[t.Tuple[str, bool], t.Tuple[None, None]]:
+    """Unquote a single etag:
+
+    >>> unquote_etag('W/"bar"')
+    ('bar', True)
+    >>> unquote_etag('"bar"')
+    ('bar', False)
+
+    :param etag: the etag identifier to unquote.
+    :return: a ``(etag, weak)`` tuple.
+    """
+    if not etag:
+        return None, None
+    etag = etag.strip()
+    weak = False
+    if etag.startswith(("W/", "w/")):
+        weak = True
+        etag = etag[2:]
+    if etag[:1] == etag[-1:] == '"':
+        etag = etag[1:-1]
+    return etag, weak
+
+
+def parse_etags(value: t.Optional[str]) -> "ds.ETags":
+    """Parse an etag header.
+
+    :param value: the tag header to parse
+    :return: an :class:`~werkzeug.datastructures.ETags` object.
+    """
+    if not value:
+        return ds.ETags()
+    strong = []
+    weak = []
+    end = len(value)
+    pos = 0
+    while pos < end:
+        match = _etag_re.match(value, pos)
+        if match is None:
+            break
+        is_weak, quoted, raw = match.groups()
+        if raw == "*":
+            return ds.ETags(star_tag=True)
+        elif quoted:
+            raw = quoted
+        if is_weak:
+            weak.append(raw)
+        else:
+            strong.append(raw)
+        pos = match.end()
+    return ds.ETags(strong, weak)
+
+
+def generate_etag(data: bytes) -> str:
+    """Generate an etag for some data.
+
+    .. versionchanged:: 2.0
+        Use SHA-1. MD5 may not be available in some environments.
+    """
+    return sha1(data).hexdigest()
+
+
+def parse_date(value: t.Optional[str]) -> t.Optional[datetime]:
+    """Parse an :rfc:`2822` date into a timezone-aware
+    :class:`datetime.datetime` object, or ``None`` if parsing fails.
+
+    This is a wrapper for :func:`email.utils.parsedate_to_datetime`. It
+    returns ``None`` if parsing fails instead of raising an exception,
+    and always returns a timezone-aware datetime object. If the string
+    doesn't have timezone information, it is assumed to be UTC.
+
+    :param value: A string with a supported date format.
+
+    .. versionchanged:: 2.0
+        Return a timezone-aware datetime object. Use
+        ``email.utils.parsedate_to_datetime``.
+    """
+    if value is None:
+        return None
+
+    try:
+        dt = email.utils.parsedate_to_datetime(value)
+    except (TypeError, ValueError):
+        return None
+
+    if dt.tzinfo is None:
+        return dt.replace(tzinfo=timezone.utc)
+
+    return dt
+
+
+def cookie_date(
+    expires: t.Optional[t.Union[datetime, date, int, float, struct_time]] = None
+) -> str:
+    """Format a datetime object or timestamp into an :rfc:`2822` date
+    string for ``Set-Cookie expires``.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Use :func:`http_date` instead.
+    """
+    warnings.warn(
+        "'cookie_date' is deprecated and will be removed in Werkzeug"
+        " 2.1. Use 'http_date' instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return http_date(expires)
+
+
+def http_date(
+    timestamp: t.Optional[t.Union[datetime, date, int, float, struct_time]] = None
+) -> str:
+    """Format a datetime object or timestamp into an :rfc:`2822` date
+    string.
+
+    This is a wrapper for :func:`email.utils.format_datetime`. It
+    assumes naive datetime objects are in UTC instead of raising an
+    exception.
+
+    :param timestamp: The datetime or timestamp to format. Defaults to
+        the current time.
+
+    .. versionchanged:: 2.0
+        Use ``email.utils.format_datetime``. Accept ``date`` objects.
+    """
+    if isinstance(timestamp, date):
+        if not isinstance(timestamp, datetime):
+            # Assume plain date is midnight UTC.
+            timestamp = datetime.combine(timestamp, time(), tzinfo=timezone.utc)
+        else:
+            # Ensure datetime is timezone-aware.
+            timestamp = _dt_as_utc(timestamp)
+
+        return email.utils.format_datetime(timestamp, usegmt=True)
+
+    if isinstance(timestamp, struct_time):
+        timestamp = mktime(timestamp)
+
+    return email.utils.formatdate(timestamp, usegmt=True)
+
+
+def parse_age(value: t.Optional[str] = None) -> t.Optional[timedelta]:
+    """Parses a base-10 integer count of seconds into a timedelta.
+
+    If parsing fails, the return value is `None`.
+
+    :param value: a string consisting of an integer represented in base-10
+    :return: a :class:`datetime.timedelta` object or `None`.
+    """
+    if not value:
+        return None
+    try:
+        seconds = int(value)
+    except ValueError:
+        return None
+    if seconds < 0:
+        return None
+    try:
+        return timedelta(seconds=seconds)
+    except OverflowError:
+        return None
+
+
+def dump_age(age: t.Optional[t.Union[timedelta, int]] = None) -> t.Optional[str]:
+    """Formats the duration as a base-10 integer.
+
+    :param age: should be an integer number of seconds,
+                a :class:`datetime.timedelta` object, or,
+                if the age is unknown, `None` (default).
+    """
+    if age is None:
+        return None
+    if isinstance(age, timedelta):
+        age = int(age.total_seconds())
+    else:
+        age = int(age)
+
+    if age < 0:
+        raise ValueError("age cannot be negative")
+
+    return str(age)
+
+
+def is_resource_modified(
+    environ: "WSGIEnvironment",
+    etag: t.Optional[str] = None,
+    data: t.Optional[bytes] = None,
+    last_modified: t.Optional[t.Union[datetime, str]] = None,
+    ignore_if_range: bool = True,
+) -> bool:
+    """Convenience method for conditional requests.
+
+    :param environ: the WSGI environment of the request to be checked.
+    :param etag: the etag for the response for comparison.
+    :param data: or alternatively the data of the response to automatically
+                 generate an etag using :func:`generate_etag`.
+    :param last_modified: an optional date of the last modification.
+    :param ignore_if_range: If `False`, `If-Range` header will be taken into
+                            account.
+    :return: `True` if the resource was modified, otherwise `False`.
+
+    .. versionchanged:: 2.0
+        SHA-1 is used to generate an etag value for the data. MD5 may
+        not be available in some environments.
+
+    .. versionchanged:: 1.0.0
+        The check is run for methods other than ``GET`` and ``HEAD``.
+    """
+    if etag is None and data is not None:
+        etag = generate_etag(data)
+    elif data is not None:
+        raise TypeError("both data and etag given")
+
+    unmodified = False
+    if isinstance(last_modified, str):
+        last_modified = parse_date(last_modified)
+
+    # HTTP doesn't use microsecond, remove it to avoid false positive
+    # comparisons. Mark naive datetimes as UTC.
+    if last_modified is not None:
+        last_modified = _dt_as_utc(last_modified.replace(microsecond=0))
+
+    if_range = None
+    if not ignore_if_range and "HTTP_RANGE" in environ:
+        # https://tools.ietf.org/html/rfc7233#section-3.2
+        # A server MUST ignore an If-Range header field received in a request
+        # that does not contain a Range header field.
+        if_range = parse_if_range_header(environ.get("HTTP_IF_RANGE"))
+
+    if if_range is not None and if_range.date is not None:
+        modified_since: t.Optional[datetime] = if_range.date
+    else:
+        modified_since = parse_date(environ.get("HTTP_IF_MODIFIED_SINCE"))
+
+    if modified_since and last_modified and last_modified <= modified_since:
+        unmodified = True
+
+    if etag:
+        etag, _ = unquote_etag(etag)
+        etag = t.cast(str, etag)
+
+        if if_range is not None and if_range.etag is not None:
+            unmodified = parse_etags(if_range.etag).contains(etag)
+        else:
+            if_none_match = parse_etags(environ.get("HTTP_IF_NONE_MATCH"))
+            if if_none_match:
+                # https://tools.ietf.org/html/rfc7232#section-3.2
+                # "A recipient MUST use the weak comparison function when comparing
+                # entity-tags for If-None-Match"
+                unmodified = if_none_match.contains_weak(etag)
+
+            # https://tools.ietf.org/html/rfc7232#section-3.1
+            # "Origin server MUST use the strong comparison function when
+            # comparing entity-tags for If-Match"
+            if_match = parse_etags(environ.get("HTTP_IF_MATCH"))
+            if if_match:
+                unmodified = not if_match.is_strong(etag)
+
+    return not unmodified
+
+
+def remove_entity_headers(
+    headers: t.Union["ds.Headers", t.List[t.Tuple[str, str]]],
+    allowed: t.Iterable[str] = ("expires", "content-location"),
+) -> None:
+    """Remove all entity headers from a list or :class:`Headers` object.  This
+    operation works in-place.  `Expires` and `Content-Location` headers are
+    by default not removed.  The reason for this is :rfc:`2616` section
+    10.3.5 which specifies some entity headers that should be sent.
+
+    .. versionchanged:: 0.5
+       added `allowed` parameter.
+
+    :param headers: a list or :class:`Headers` object.
+    :param allowed: a list of headers that should still be allowed even though
+                    they are entity headers.
+    """
+    allowed = {x.lower() for x in allowed}
+    headers[:] = [
+        (key, value)
+        for key, value in headers
+        if not is_entity_header(key) or key.lower() in allowed
+    ]
+
+
+def remove_hop_by_hop_headers(
+    headers: t.Union["ds.Headers", t.List[t.Tuple[str, str]]]
+) -> None:
+    """Remove all HTTP/1.1 "Hop-by-Hop" headers from a list or
+    :class:`Headers` object.  This operation works in-place.
+
+    .. versionadded:: 0.5
+
+    :param headers: a list or :class:`Headers` object.
+    """
+    headers[:] = [
+        (key, value) for key, value in headers if not is_hop_by_hop_header(key)
+    ]
+
+
+def is_entity_header(header: str) -> bool:
+    """Check if a header is an entity header.
+
+    .. versionadded:: 0.5
+
+    :param header: the header to test.
+    :return: `True` if it's an entity header, `False` otherwise.
+    """
+    return header.lower() in _entity_headers
+
+
+def is_hop_by_hop_header(header: str) -> bool:
+    """Check if a header is an HTTP/1.1 "Hop-by-Hop" header.
+
+    .. versionadded:: 0.5
+
+    :param header: the header to test.
+    :return: `True` if it's an HTTP/1.1 "Hop-by-Hop" header, `False` otherwise.
+    """
+    return header.lower() in _hop_by_hop_headers
+
+
+def parse_cookie(
+    header: t.Union["WSGIEnvironment", str, bytes, None],
+    charset: str = "utf-8",
+    errors: str = "replace",
+    cls: t.Optional[t.Type["ds.MultiDict"]] = None,
+) -> "ds.MultiDict[str, str]":
+    """Parse a cookie from a string or WSGI environ.
+
+    The same key can be provided multiple times, the values are stored
+    in-order. The default :class:`MultiDict` will have the first value
+    first, and all values can be retrieved with
+    :meth:`MultiDict.getlist`.
+
+    :param header: The cookie header as a string, or a WSGI environ dict
+        with a ``HTTP_COOKIE`` key.
+    :param charset: The charset for the cookie values.
+    :param errors: The error behavior for the charset decoding.
+    :param cls: A dict-like class to store the parsed cookies in.
+        Defaults to :class:`MultiDict`.
+
+    .. versionchanged:: 1.0.0
+        Returns a :class:`MultiDict` instead of a
+        ``TypeConversionDict``.
+
+    .. versionchanged:: 0.5
+       Returns a :class:`TypeConversionDict` instead of a regular dict.
+       The ``cls`` parameter was added.
+    """
+    if isinstance(header, dict):
+        header = header.get("HTTP_COOKIE", "")
+    elif header is None:
+        header = ""
+
+    # PEP 3333 sends headers through the environ as latin1 decoded
+    # strings. Encode strings back to bytes for parsing.
+    if isinstance(header, str):
+        header = header.encode("latin1", "replace")
+
+    if cls is None:
+        cls = ds.MultiDict
+
+    def _parse_pairs() -> t.Iterator[t.Tuple[str, str]]:
+        for key, val in _cookie_parse_impl(header):  # type: ignore
+            key_str = _to_str(key, charset, errors, allow_none_charset=True)
+
+            if not key_str:
+                continue
+
+            val_str = _to_str(val, charset, errors, allow_none_charset=True)
+            yield key_str, val_str
+
+    return cls(_parse_pairs())
+
+
+def dump_cookie(
+    key: str,
+    value: t.Union[bytes, str] = "",
+    max_age: t.Optional[t.Union[timedelta, int]] = None,
+    expires: t.Optional[t.Union[str, datetime, int, float]] = None,
+    path: t.Optional[str] = "/",
+    domain: t.Optional[str] = None,
+    secure: bool = False,
+    httponly: bool = False,
+    charset: str = "utf-8",
+    sync_expires: bool = True,
+    max_size: int = 4093,
+    samesite: t.Optional[str] = None,
+) -> str:
+    """Create a Set-Cookie header without the ``Set-Cookie`` prefix.
+
+    The return value is usually restricted to ascii as the vast majority
+    of values are properly escaped, but that is no guarantee. It's
+    tunneled through latin1 as required by :pep:`3333`.
+
+    The return value is not ASCII safe if the key contains unicode
+    characters.  This is technically against the specification but
+    happens in the wild.  It's strongly recommended to not use
+    non-ASCII values for the keys.
+
+    :param max_age: should be a number of seconds, or `None` (default) if
+                    the cookie should last only as long as the client's
+                    browser session.  Additionally `timedelta` objects
+                    are accepted, too.
+    :param expires: should be a `datetime` object or unix timestamp.
+    :param path: limits the cookie to a given path, per default it will
+                 span the whole domain.
+    :param domain: Use this if you want to set a cross-domain cookie. For
+                   example, ``domain=".example.com"`` will set a cookie
+                   that is readable by the domain ``www.example.com``,
+                   ``foo.example.com`` etc. Otherwise, a cookie will only
+                   be readable by the domain that set it.
+    :param secure: The cookie will only be available via HTTPS
+    :param httponly: disallow JavaScript to access the cookie.  This is an
+                     extension to the cookie standard and probably not
+                     supported by all browsers.
+    :param charset: the encoding for string values.
+    :param sync_expires: automatically set expires if max_age is defined
+                         but expires not.
+    :param max_size: Warn if the final header value exceeds this size. The
+        default, 4093, should be safely `supported by most browsers
+        `_. Set to 0 to disable this check.
+    :param samesite: Limits the scope of the cookie such that it will
+        only be attached to requests if those requests are same-site.
+
+    .. _`cookie`: http://browsercookielimits.squawky.net/
+
+    .. versionchanged:: 1.0.0
+        The string ``'None'`` is accepted for ``samesite``.
+    """
+    key = _to_bytes(key, charset)
+    value = _to_bytes(value, charset)
+
+    if path is not None:
+        from .urls import iri_to_uri
+
+        path = iri_to_uri(path, charset)
+
+    domain = _make_cookie_domain(domain)
+
+    if isinstance(max_age, timedelta):
+        max_age = int(max_age.total_seconds())
+
+    if expires is not None:
+        if not isinstance(expires, str):
+            expires = http_date(expires)
+    elif max_age is not None and sync_expires:
+        expires = http_date(datetime.now(tz=timezone.utc).timestamp() + max_age)
+
+    if samesite is not None:
+        samesite = samesite.title()
+
+        if samesite not in {"Strict", "Lax", "None"}:
+            raise ValueError("SameSite must be 'Strict', 'Lax', or 'None'.")
+
+    buf = [key + b"=" + _cookie_quote(value)]
+
+    # XXX: In theory all of these parameters that are not marked with `None`
+    # should be quoted.  Because stdlib did not quote it before I did not
+    # want to introduce quoting there now.
+    for k, v, q in (
+        (b"Domain", domain, True),
+        (b"Expires", expires, False),
+        (b"Max-Age", max_age, False),
+        (b"Secure", secure, None),
+        (b"HttpOnly", httponly, None),
+        (b"Path", path, False),
+        (b"SameSite", samesite, False),
+    ):
+        if q is None:
+            if v:
+                buf.append(k)
+            continue
+
+        if v is None:
+            continue
+
+        tmp = bytearray(k)
+        if not isinstance(v, (bytes, bytearray)):
+            v = _to_bytes(str(v), charset)
+        if q:
+            v = _cookie_quote(v)
+        tmp += b"=" + v
+        buf.append(bytes(tmp))
+
+    # The return value will be an incorrectly encoded latin1 header for
+    # consistency with the headers object.
+    rv = b"; ".join(buf)
+    rv = rv.decode("latin1")
+
+    # Warn if the final value of the cookie is larger than the limit. If the
+    # cookie is too large, then it may be silently ignored by the browser,
+    # which can be quite hard to debug.
+    cookie_size = len(rv)
+
+    if max_size and cookie_size > max_size:
+        value_size = len(value)
+        warnings.warn(
+            f"The {key.decode(charset)!r} cookie is too large: the value was"
+            f" {value_size} bytes but the"
+            f" header required {cookie_size - value_size} extra bytes. The final size"
+            f" was {cookie_size} bytes but the limit is {max_size} bytes. Browsers may"
+            f" silently ignore cookies larger than this.",
+            stacklevel=2,
+        )
+
+    return rv
+
+
+def is_byte_range_valid(
+    start: t.Optional[int], stop: t.Optional[int], length: t.Optional[int]
+) -> bool:
+    """Checks if a given byte content range is valid for the given length.
+
+    .. versionadded:: 0.7
+    """
+    if (start is None) != (stop is None):
+        return False
+    elif start is None:
+        return length is None or length >= 0
+    elif length is None:
+        return 0 <= start < stop  # type: ignore
+    elif start >= stop:  # type: ignore
+        return False
+    return 0 <= start < length
+
+
+# circular dependencies
+from . import datastructures as ds
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/local.py b/.venv/lib/python3.6/site-packages/werkzeug/local.py
new file mode 100644
index 0000000..b4dee7b
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/local.py
@@ -0,0 +1,677 @@
+import copy
+import math
+import operator
+import sys
+import typing as t
+import warnings
+from functools import partial
+from functools import update_wrapper
+
+from .wsgi import ClosingIterator
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import StartResponse
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+
+F = t.TypeVar("F", bound=t.Callable[..., t.Any])
+
+try:
+    from greenlet import getcurrent as _get_ident
+except ImportError:
+    from threading import get_ident as _get_ident
+
+
+def get_ident() -> int:
+    warnings.warn(
+        "'get_ident' is deprecated and will be removed in Werkzeug"
+        " 2.1. Use 'greenlet.getcurrent' or 'threading.get_ident' for"
+        " previous behavior.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return _get_ident()  # type: ignore
+
+
+class _CannotUseContextVar(Exception):
+    pass
+
+
+try:
+    from contextvars import ContextVar
+
+    if "gevent" in sys.modules or "eventlet" in sys.modules:
+        # Both use greenlet, so first check it has patched
+        # ContextVars, Greenlet <0.4.17 does not.
+        import greenlet
+
+        greenlet_patched = getattr(greenlet, "GREENLET_USE_CONTEXT_VARS", False)
+
+        if not greenlet_patched:
+            # If Gevent is used, check it has patched ContextVars,
+            # <20.5 does not.
+            try:
+                from gevent.monkey import is_object_patched
+            except ImportError:
+                # Gevent isn't used, but Greenlet is and hasn't patched
+                raise _CannotUseContextVar() from None
+            else:
+                if is_object_patched("threading", "local") and not is_object_patched(
+                    "contextvars", "ContextVar"
+                ):
+                    raise _CannotUseContextVar()
+
+    def __release_local__(storage: t.Any) -> None:
+        # Can remove when support for non-stdlib ContextVars is
+        # removed, see "Fake" version below.
+        storage.set({})
+
+
+except (ImportError, _CannotUseContextVar):
+
+    class ContextVar:  # type: ignore
+        """A fake ContextVar based on the previous greenlet/threading
+        ident function. Used on Python 3.6, eventlet, and old versions
+        of gevent.
+        """
+
+        def __init__(self, _name: str) -> None:
+            self.storage: t.Dict[int, t.Dict[str, t.Any]] = {}
+
+        def get(self, default: t.Dict[str, t.Any]) -> t.Dict[str, t.Any]:
+            return self.storage.get(_get_ident(), default)
+
+        def set(self, value: t.Dict[str, t.Any]) -> None:
+            self.storage[_get_ident()] = value
+
+    def __release_local__(storage: t.Any) -> None:
+        # Special version to ensure that the storage is cleaned up on
+        # release.
+        storage.storage.pop(_get_ident(), None)
+
+
+def release_local(local: t.Union["Local", "LocalStack"]) -> None:
+    """Releases the contents of the local for the current context.
+    This makes it possible to use locals without a manager.
+
+    Example::
+
+        >>> loc = Local()
+        >>> loc.foo = 42
+        >>> release_local(loc)
+        >>> hasattr(loc, 'foo')
+        False
+
+    With this function one can release :class:`Local` objects as well
+    as :class:`LocalStack` objects.  However it is not possible to
+    release data held by proxies that way, one always has to retain
+    a reference to the underlying local object in order to be able
+    to release it.
+
+    .. versionadded:: 0.6.1
+    """
+    local.__release_local__()
+
+
+class Local:
+    __slots__ = ("_storage",)
+
+    def __init__(self) -> None:
+        object.__setattr__(self, "_storage", ContextVar("local_storage"))
+
+    @property
+    def __storage__(self) -> t.Dict[str, t.Any]:
+        warnings.warn(
+            "'__storage__' is deprecated and will be removed in Werkzeug 2.1.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return self._storage.get({})  # type: ignore
+
+    @property
+    def __ident_func__(self) -> t.Callable[[], int]:
+        warnings.warn(
+            "'__ident_func__' is deprecated and will be removed in"
+            " Werkzeug 2.1. It should not be used in Python 3.7+.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return _get_ident  # type: ignore
+
+    @__ident_func__.setter
+    def __ident_func__(self, func: t.Callable[[], int]) -> None:
+        warnings.warn(
+            "'__ident_func__' is deprecated and will be removed in"
+            " Werkzeug 2.1. Setting it no longer has any effect.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+
+    def __iter__(self) -> t.Iterator[t.Tuple[int, t.Any]]:
+        return iter(self._storage.get({}).items())
+
+    def __call__(self, proxy: str) -> "LocalProxy":
+        """Create a proxy for a name."""
+        return LocalProxy(self, proxy)
+
+    def __release_local__(self) -> None:
+        __release_local__(self._storage)
+
+    def __getattr__(self, name: str) -> t.Any:
+        values = self._storage.get({})
+        try:
+            return values[name]
+        except KeyError:
+            raise AttributeError(name) from None
+
+    def __setattr__(self, name: str, value: t.Any) -> None:
+        values = self._storage.get({}).copy()
+        values[name] = value
+        self._storage.set(values)
+
+    def __delattr__(self, name: str) -> None:
+        values = self._storage.get({}).copy()
+        try:
+            del values[name]
+            self._storage.set(values)
+        except KeyError:
+            raise AttributeError(name) from None
+
+
+class LocalStack:
+    """This class works similar to a :class:`Local` but keeps a stack
+    of objects instead.  This is best explained with an example::
+
+        >>> ls = LocalStack()
+        >>> ls.push(42)
+        >>> ls.top
+        42
+        >>> ls.push(23)
+        >>> ls.top
+        23
+        >>> ls.pop()
+        23
+        >>> ls.top
+        42
+
+    They can be force released by using a :class:`LocalManager` or with
+    the :func:`release_local` function but the correct way is to pop the
+    item from the stack after using.  When the stack is empty it will
+    no longer be bound to the current context (and as such released).
+
+    By calling the stack without arguments it returns a proxy that resolves to
+    the topmost item on the stack.
+
+    .. versionadded:: 0.6.1
+    """
+
+    def __init__(self) -> None:
+        self._local = Local()
+
+    def __release_local__(self) -> None:
+        self._local.__release_local__()
+
+    @property
+    def __ident_func__(self) -> t.Callable[[], int]:
+        return self._local.__ident_func__
+
+    @__ident_func__.setter
+    def __ident_func__(self, value: t.Callable[[], int]) -> None:
+        object.__setattr__(self._local, "__ident_func__", value)
+
+    def __call__(self) -> "LocalProxy":
+        def _lookup() -> t.Any:
+            rv = self.top
+            if rv is None:
+                raise RuntimeError("object unbound")
+            return rv
+
+        return LocalProxy(_lookup)
+
+    def push(self, obj: t.Any) -> t.List[t.Any]:
+        """Pushes a new item to the stack"""
+        rv = getattr(self._local, "stack", []).copy()
+        rv.append(obj)
+        self._local.stack = rv
+        return rv  # type: ignore
+
+    def pop(self) -> t.Any:
+        """Removes the topmost item from the stack, will return the
+        old value or `None` if the stack was already empty.
+        """
+        stack = getattr(self._local, "stack", None)
+        if stack is None:
+            return None
+        elif len(stack) == 1:
+            release_local(self._local)
+            return stack[-1]
+        else:
+            return stack.pop()
+
+    @property
+    def top(self) -> t.Any:
+        """The topmost item on the stack.  If the stack is empty,
+        `None` is returned.
+        """
+        try:
+            return self._local.stack[-1]
+        except (AttributeError, IndexError):
+            return None
+
+
+class LocalManager:
+    """Local objects cannot manage themselves. For that you need a local
+    manager. You can pass a local manager multiple locals or add them
+    later by appending them to `manager.locals`. Every time the manager
+    cleans up, it will clean up all the data left in the locals for this
+    context.
+
+    .. versionchanged:: 2.0
+        ``ident_func`` is deprecated and will be removed in Werkzeug
+         2.1.
+
+    .. versionchanged:: 0.6.1
+        The :func:`release_local` function can be used instead of a
+        manager.
+
+    .. versionchanged:: 0.7
+        The ``ident_func`` parameter was added.
+    """
+
+    def __init__(
+        self,
+        locals: t.Optional[t.Iterable[t.Union[Local, LocalStack]]] = None,
+        ident_func: None = None,
+    ) -> None:
+        if locals is None:
+            self.locals = []
+        elif isinstance(locals, Local):
+            self.locals = [locals]
+        else:
+            self.locals = list(locals)
+
+        if ident_func is not None:
+            warnings.warn(
+                "'ident_func' is deprecated and will be removed in"
+                " Werkzeug 2.1. Setting it no longer has any effect.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+
+    @property
+    def ident_func(self) -> t.Callable[[], int]:
+        warnings.warn(
+            "'ident_func' is deprecated and will be removed in Werkzeug 2.1.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return _get_ident  # type: ignore
+
+    @ident_func.setter
+    def ident_func(self, func: t.Callable[[], int]) -> None:
+        warnings.warn(
+            "'ident_func' is deprecated and will be removedin Werkzeug"
+            " 2.1. Setting it no longer has any effect.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+
+    def get_ident(self) -> int:
+        """Return the context identifier the local objects use internally for
+        this context.  You cannot override this method to change the behavior
+        but use it to link other context local objects (such as SQLAlchemy's
+        scoped sessions) to the Werkzeug locals.
+
+        .. deprecated:: 2.0
+            Will be removed in Werkzeug 2.1.
+
+        .. versionchanged:: 0.7
+           You can pass a different ident function to the local manager that
+           will then be propagated to all the locals passed to the
+           constructor.
+        """
+        warnings.warn(
+            "'get_ident' is deprecated and will be removed in Werkzeug 2.1.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return self.ident_func()
+
+    def cleanup(self) -> None:
+        """Manually clean up the data in the locals for this context.  Call
+        this at the end of the request or use `make_middleware()`.
+        """
+        for local in self.locals:
+            release_local(local)
+
+    def make_middleware(self, app: "WSGIApplication") -> "WSGIApplication":
+        """Wrap a WSGI application so that cleaning up happens after
+        request end.
+        """
+
+        def application(
+            environ: "WSGIEnvironment", start_response: "StartResponse"
+        ) -> t.Iterable[bytes]:
+            return ClosingIterator(app(environ, start_response), self.cleanup)
+
+        return application
+
+    def middleware(self, func: "WSGIApplication") -> "WSGIApplication":
+        """Like `make_middleware` but for decorating functions.
+
+        Example usage::
+
+            @manager.middleware
+            def application(environ, start_response):
+                ...
+
+        The difference to `make_middleware` is that the function passed
+        will have all the arguments copied from the inner application
+        (name, docstring, module).
+        """
+        return update_wrapper(self.make_middleware(func), func)
+
+    def __repr__(self) -> str:
+        return f"<{type(self).__name__} storages: {len(self.locals)}>"
+
+
+class _ProxyLookup:
+    """Descriptor that handles proxied attribute lookup for
+    :class:`LocalProxy`.
+
+    :param f: The built-in function this attribute is accessed through.
+        Instead of looking up the special method, the function call
+        is redone on the object.
+    :param fallback: Call this method if the proxy is unbound instead of
+        raising a :exc:`RuntimeError`.
+    :param class_value: Value to return when accessed from the class.
+        Used for ``__doc__`` so building docs still works.
+    """
+
+    __slots__ = ("bind_f", "fallback", "class_value", "name")
+
+    def __init__(
+        self,
+        f: t.Optional[t.Callable] = None,
+        fallback: t.Optional[t.Callable] = None,
+        class_value: t.Optional[t.Any] = None,
+    ) -> None:
+        bind_f: t.Optional[t.Callable[["LocalProxy", t.Any], t.Callable]]
+
+        if hasattr(f, "__get__"):
+            # A Python function, can be turned into a bound method.
+
+            def bind_f(instance: "LocalProxy", obj: t.Any) -> t.Callable:
+                return f.__get__(obj, type(obj))  # type: ignore
+
+        elif f is not None:
+            # A C function, use partial to bind the first argument.
+
+            def bind_f(instance: "LocalProxy", obj: t.Any) -> t.Callable:
+                return partial(f, obj)  # type: ignore
+
+        else:
+            # Use getattr, which will produce a bound method.
+            bind_f = None
+
+        self.bind_f = bind_f
+        self.fallback = fallback
+        self.class_value = class_value
+
+    def __set_name__(self, owner: "LocalProxy", name: str) -> None:
+        self.name = name
+
+    def __get__(self, instance: "LocalProxy", owner: t.Optional[type] = None) -> t.Any:
+        if instance is None:
+            if self.class_value is not None:
+                return self.class_value
+
+            return self
+
+        try:
+            obj = instance._get_current_object()
+        except RuntimeError:
+            if self.fallback is None:
+                raise
+
+            return self.fallback.__get__(instance, owner)  # type: ignore
+
+        if self.bind_f is not None:
+            return self.bind_f(instance, obj)
+
+        return getattr(obj, self.name)
+
+    def __repr__(self) -> str:
+        return f"proxy {self.name}"
+
+    def __call__(self, instance: "LocalProxy", *args: t.Any, **kwargs: t.Any) -> t.Any:
+        """Support calling unbound methods from the class. For example,
+        this happens with ``copy.copy``, which does
+        ``type(x).__copy__(x)``. ``type(x)`` can't be proxied, so it
+        returns the proxy type and descriptor.
+        """
+        return self.__get__(instance, type(instance))(*args, **kwargs)
+
+
+class _ProxyIOp(_ProxyLookup):
+    """Look up an augmented assignment method on a proxied object. The
+    method is wrapped to return the proxy instead of the object.
+    """
+
+    __slots__ = ()
+
+    def __init__(
+        self, f: t.Optional[t.Callable] = None, fallback: t.Optional[t.Callable] = None
+    ) -> None:
+        super().__init__(f, fallback)
+
+        def bind_f(instance: "LocalProxy", obj: t.Any) -> t.Callable:
+            def i_op(self: t.Any, other: t.Any) -> "LocalProxy":
+                f(self, other)  # type: ignore
+                return instance
+
+            return i_op.__get__(obj, type(obj))  # type: ignore
+
+        self.bind_f = bind_f
+
+
+def _l_to_r_op(op: F) -> F:
+    """Swap the argument order to turn an l-op into an r-op."""
+
+    def r_op(obj: t.Any, other: t.Any) -> t.Any:
+        return op(other, obj)
+
+    return t.cast(F, r_op)
+
+
+class LocalProxy:
+    """A proxy to the object bound to a :class:`Local`. All operations
+    on the proxy are forwarded to the bound object. If no object is
+    bound, a :exc:`RuntimeError` is raised.
+
+    .. code-block:: python
+
+        from werkzeug.local import Local
+        l = Local()
+
+        # a proxy to whatever l.user is set to
+        user = l("user")
+
+        from werkzeug.local import LocalStack
+        _request_stack = LocalStack()
+
+        # a proxy to _request_stack.top
+        request = _request_stack()
+
+        # a proxy to the session attribute of the request proxy
+        session = LocalProxy(lambda: request.session)
+
+    ``__repr__`` and ``__class__`` are forwarded, so ``repr(x)`` and
+    ``isinstance(x, cls)`` will look like the proxied object. Use
+    ``issubclass(type(x), LocalProxy)`` to check if an object is a
+    proxy.
+
+    .. code-block:: python
+
+        repr(user)  # 
+        isinstance(user, User)  # True
+        issubclass(type(user), LocalProxy)  # True
+
+    :param local: The :class:`Local` or callable that provides the
+        proxied object.
+    :param name: The attribute name to look up on a :class:`Local`. Not
+        used if a callable is given.
+
+    .. versionchanged:: 2.0
+        Updated proxied attributes and methods to reflect the current
+        data model.
+
+    .. versionchanged:: 0.6.1
+        The class can be instantiated with a callable.
+    """
+
+    __slots__ = ("__local", "__name", "__wrapped__")
+
+    def __init__(
+        self,
+        local: t.Union["Local", t.Callable[[], t.Any]],
+        name: t.Optional[str] = None,
+    ) -> None:
+        object.__setattr__(self, "_LocalProxy__local", local)
+        object.__setattr__(self, "_LocalProxy__name", name)
+
+        if callable(local) and not hasattr(local, "__release_local__"):
+            # "local" is a callable that is not an instance of Local or
+            # LocalManager: mark it as a wrapped function.
+            object.__setattr__(self, "__wrapped__", local)
+
+    def _get_current_object(self) -> t.Any:
+        """Return the current object.  This is useful if you want the real
+        object behind the proxy at a time for performance reasons or because
+        you want to pass the object into a different context.
+        """
+        if not hasattr(self.__local, "__release_local__"):  # type: ignore
+            return self.__local()  # type: ignore
+
+        try:
+            return getattr(self.__local, self.__name)  # type: ignore
+        except AttributeError:
+            name = self.__name  # type: ignore
+            raise RuntimeError(f"no object bound to {name}") from None
+
+    __doc__ = _ProxyLookup(  # type: ignore
+        class_value=__doc__, fallback=lambda self: type(self).__doc__
+    )
+    # __del__ should only delete the proxy
+    __repr__ = _ProxyLookup(  # type: ignore
+        repr, fallback=lambda self: f"<{type(self).__name__} unbound>"
+    )
+    __str__ = _ProxyLookup(str)  # type: ignore
+    __bytes__ = _ProxyLookup(bytes)
+    __format__ = _ProxyLookup()  # type: ignore
+    __lt__ = _ProxyLookup(operator.lt)
+    __le__ = _ProxyLookup(operator.le)
+    __eq__ = _ProxyLookup(operator.eq)  # type: ignore
+    __ne__ = _ProxyLookup(operator.ne)  # type: ignore
+    __gt__ = _ProxyLookup(operator.gt)
+    __ge__ = _ProxyLookup(operator.ge)
+    __hash__ = _ProxyLookup(hash)  # type: ignore
+    __bool__ = _ProxyLookup(bool, fallback=lambda self: False)
+    __getattr__ = _ProxyLookup(getattr)
+    # __getattribute__ triggered through __getattr__
+    __setattr__ = _ProxyLookup(setattr)  # type: ignore
+    __delattr__ = _ProxyLookup(delattr)  # type: ignore
+    __dir__ = _ProxyLookup(dir, fallback=lambda self: [])  # type: ignore
+    # __get__ (proxying descriptor not supported)
+    # __set__ (descriptor)
+    # __delete__ (descriptor)
+    # __set_name__ (descriptor)
+    # __objclass__ (descriptor)
+    # __slots__ used by proxy itself
+    # __dict__ (__getattr__)
+    # __weakref__ (__getattr__)
+    # __init_subclass__ (proxying metaclass not supported)
+    # __prepare__ (metaclass)
+    __class__ = _ProxyLookup(fallback=lambda self: type(self))  # type: ignore
+    __instancecheck__ = _ProxyLookup(lambda self, other: isinstance(other, self))
+    __subclasscheck__ = _ProxyLookup(lambda self, other: issubclass(other, self))
+    # __class_getitem__ triggered through __getitem__
+    __call__ = _ProxyLookup(lambda self, *args, **kwargs: self(*args, **kwargs))
+    __len__ = _ProxyLookup(len)
+    __length_hint__ = _ProxyLookup(operator.length_hint)
+    __getitem__ = _ProxyLookup(operator.getitem)
+    __setitem__ = _ProxyLookup(operator.setitem)
+    __delitem__ = _ProxyLookup(operator.delitem)
+    # __missing__ triggered through __getitem__
+    __iter__ = _ProxyLookup(iter)
+    __next__ = _ProxyLookup(next)
+    __reversed__ = _ProxyLookup(reversed)
+    __contains__ = _ProxyLookup(operator.contains)
+    __add__ = _ProxyLookup(operator.add)
+    __sub__ = _ProxyLookup(operator.sub)
+    __mul__ = _ProxyLookup(operator.mul)
+    __matmul__ = _ProxyLookup(operator.matmul)
+    __truediv__ = _ProxyLookup(operator.truediv)
+    __floordiv__ = _ProxyLookup(operator.floordiv)
+    __mod__ = _ProxyLookup(operator.mod)
+    __divmod__ = _ProxyLookup(divmod)
+    __pow__ = _ProxyLookup(pow)
+    __lshift__ = _ProxyLookup(operator.lshift)
+    __rshift__ = _ProxyLookup(operator.rshift)
+    __and__ = _ProxyLookup(operator.and_)
+    __xor__ = _ProxyLookup(operator.xor)
+    __or__ = _ProxyLookup(operator.or_)
+    __radd__ = _ProxyLookup(_l_to_r_op(operator.add))
+    __rsub__ = _ProxyLookup(_l_to_r_op(operator.sub))
+    __rmul__ = _ProxyLookup(_l_to_r_op(operator.mul))
+    __rmatmul__ = _ProxyLookup(_l_to_r_op(operator.matmul))
+    __rtruediv__ = _ProxyLookup(_l_to_r_op(operator.truediv))
+    __rfloordiv__ = _ProxyLookup(_l_to_r_op(operator.floordiv))
+    __rmod__ = _ProxyLookup(_l_to_r_op(operator.mod))
+    __rdivmod__ = _ProxyLookup(_l_to_r_op(divmod))
+    __rpow__ = _ProxyLookup(_l_to_r_op(pow))
+    __rlshift__ = _ProxyLookup(_l_to_r_op(operator.lshift))
+    __rrshift__ = _ProxyLookup(_l_to_r_op(operator.rshift))
+    __rand__ = _ProxyLookup(_l_to_r_op(operator.and_))
+    __rxor__ = _ProxyLookup(_l_to_r_op(operator.xor))
+    __ror__ = _ProxyLookup(_l_to_r_op(operator.or_))
+    __iadd__ = _ProxyIOp(operator.iadd)
+    __isub__ = _ProxyIOp(operator.isub)
+    __imul__ = _ProxyIOp(operator.imul)
+    __imatmul__ = _ProxyIOp(operator.imatmul)
+    __itruediv__ = _ProxyIOp(operator.itruediv)
+    __ifloordiv__ = _ProxyIOp(operator.ifloordiv)
+    __imod__ = _ProxyIOp(operator.imod)
+    __ipow__ = _ProxyIOp(operator.ipow)
+    __ilshift__ = _ProxyIOp(operator.ilshift)
+    __irshift__ = _ProxyIOp(operator.irshift)
+    __iand__ = _ProxyIOp(operator.iand)
+    __ixor__ = _ProxyIOp(operator.ixor)
+    __ior__ = _ProxyIOp(operator.ior)
+    __neg__ = _ProxyLookup(operator.neg)
+    __pos__ = _ProxyLookup(operator.pos)
+    __abs__ = _ProxyLookup(abs)
+    __invert__ = _ProxyLookup(operator.invert)
+    __complex__ = _ProxyLookup(complex)
+    __int__ = _ProxyLookup(int)
+    __float__ = _ProxyLookup(float)
+    __index__ = _ProxyLookup(operator.index)
+    __round__ = _ProxyLookup(round)
+    __trunc__ = _ProxyLookup(math.trunc)
+    __floor__ = _ProxyLookup(math.floor)
+    __ceil__ = _ProxyLookup(math.ceil)
+    __enter__ = _ProxyLookup()
+    __exit__ = _ProxyLookup()
+    __await__ = _ProxyLookup()
+    __aiter__ = _ProxyLookup()
+    __anext__ = _ProxyLookup()
+    __aenter__ = _ProxyLookup()
+    __aexit__ = _ProxyLookup()
+    __copy__ = _ProxyLookup(copy.copy)
+    __deepcopy__ = _ProxyLookup(copy.deepcopy)
+    # __getnewargs_ex__ (pickle through proxy not supported)
+    # __getnewargs__ (pickle)
+    # __getstate__ (pickle)
+    # __setstate__ (pickle)
+    # __reduce__ (pickle)
+    # __reduce_ex__ (pickle)
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/middleware/__init__.py b/.venv/lib/python3.6/site-packages/werkzeug/middleware/__init__.py
new file mode 100644
index 0000000..6ddcf7f
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/middleware/__init__.py
@@ -0,0 +1,22 @@
+"""
+Middleware
+==========
+
+A WSGI middleware is a WSGI application that wraps another application
+in order to observe or change its behavior. Werkzeug provides some
+middleware for common use cases.
+
+.. toctree::
+    :maxdepth: 1
+
+    proxy_fix
+    shared_data
+    dispatcher
+    http_proxy
+    lint
+    profiler
+
+The :doc:`interactive debugger ` is also a middleware that can
+be applied manually, although it is typically used automatically with
+the :doc:`development server `.
+"""
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/middleware/__pycache__/__init__.cpython-36.pyc b/.venv/lib/python3.6/site-packages/werkzeug/middleware/__pycache__/__init__.cpython-36.pyc
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diff --git a/.venv/lib/python3.6/site-packages/werkzeug/middleware/dispatcher.py b/.venv/lib/python3.6/site-packages/werkzeug/middleware/dispatcher.py
new file mode 100644
index 0000000..ace1c75
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/middleware/dispatcher.py
@@ -0,0 +1,78 @@
+"""
+Application Dispatcher
+======================
+
+This middleware creates a single WSGI application that dispatches to
+multiple other WSGI applications mounted at different URL paths.
+
+A common example is writing a Single Page Application, where you have a
+backend API and a frontend written in JavaScript that does the routing
+in the browser rather than requesting different pages from the server.
+The frontend is a single HTML and JS file that should be served for any
+path besides "/api".
+
+This example dispatches to an API app under "/api", an admin app
+under "/admin", and an app that serves frontend files for all other
+requests::
+
+    app = DispatcherMiddleware(serve_frontend, {
+        '/api': api_app,
+        '/admin': admin_app,
+    })
+
+In production, you might instead handle this at the HTTP server level,
+serving files or proxying to application servers based on location. The
+API and admin apps would each be deployed with a separate WSGI server,
+and the static files would be served directly by the HTTP server.
+
+.. autoclass:: DispatcherMiddleware
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+import typing as t
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import StartResponse
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+
+
+class DispatcherMiddleware:
+    """Combine multiple applications as a single WSGI application.
+    Requests are dispatched to an application based on the path it is
+    mounted under.
+
+    :param app: The WSGI application to dispatch to if the request
+        doesn't match a mounted path.
+    :param mounts: Maps path prefixes to applications for dispatching.
+    """
+
+    def __init__(
+        self,
+        app: "WSGIApplication",
+        mounts: t.Optional[t.Dict[str, "WSGIApplication"]] = None,
+    ) -> None:
+        self.app = app
+        self.mounts = mounts or {}
+
+    def __call__(
+        self, environ: "WSGIEnvironment", start_response: "StartResponse"
+    ) -> t.Iterable[bytes]:
+        script = environ.get("PATH_INFO", "")
+        path_info = ""
+
+        while "/" in script:
+            if script in self.mounts:
+                app = self.mounts[script]
+                break
+
+            script, last_item = script.rsplit("/", 1)
+            path_info = f"/{last_item}{path_info}"
+        else:
+            app = self.mounts.get(script, self.app)
+
+        original_script_name = environ.get("SCRIPT_NAME", "")
+        environ["SCRIPT_NAME"] = original_script_name + script
+        environ["PATH_INFO"] = path_info
+        return app(environ, start_response)
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/middleware/http_proxy.py b/.venv/lib/python3.6/site-packages/werkzeug/middleware/http_proxy.py
new file mode 100644
index 0000000..1cde458
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/middleware/http_proxy.py
@@ -0,0 +1,230 @@
+"""
+Basic HTTP Proxy
+================
+
+.. autoclass:: ProxyMiddleware
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+import typing as t
+from http import client
+
+from ..datastructures import EnvironHeaders
+from ..http import is_hop_by_hop_header
+from ..urls import url_parse
+from ..urls import url_quote
+from ..wsgi import get_input_stream
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import StartResponse
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+
+
+class ProxyMiddleware:
+    """Proxy requests under a path to an external server, routing other
+    requests to the app.
+
+    This middleware can only proxy HTTP requests, as HTTP is the only
+    protocol handled by the WSGI server. Other protocols, such as
+    WebSocket requests, cannot be proxied at this layer. This should
+    only be used for development, in production a real proxy server
+    should be used.
+
+    The middleware takes a dict mapping a path prefix to a dict
+    describing the host to be proxied to::
+
+        app = ProxyMiddleware(app, {
+            "/static/": {
+                "target": "http://127.0.0.1:5001/",
+            }
+        })
+
+    Each host has the following options:
+
+    ``target``:
+        The target URL to dispatch to. This is required.
+    ``remove_prefix``:
+        Whether to remove the prefix from the URL before dispatching it
+        to the target. The default is ``False``.
+    ``host``:
+        ``""`` (default):
+            The host header is automatically rewritten to the URL of the
+            target.
+        ``None``:
+            The host header is unmodified from the client request.
+        Any other value:
+            The host header is overwritten with the value.
+    ``headers``:
+        A dictionary of headers to be sent with the request to the
+        target. The default is ``{}``.
+    ``ssl_context``:
+        A :class:`ssl.SSLContext` defining how to verify requests if the
+        target is HTTPS. The default is ``None``.
+
+    In the example above, everything under ``"/static/"`` is proxied to
+    the server on port 5001. The host header is rewritten to the target,
+    and the ``"/static/"`` prefix is removed from the URLs.
+
+    :param app: The WSGI application to wrap.
+    :param targets: Proxy target configurations. See description above.
+    :param chunk_size: Size of chunks to read from input stream and
+        write to target.
+    :param timeout: Seconds before an operation to a target fails.
+
+    .. versionadded:: 0.14
+    """
+
+    def __init__(
+        self,
+        app: "WSGIApplication",
+        targets: t.Mapping[str, t.Dict[str, t.Any]],
+        chunk_size: int = 2 << 13,
+        timeout: int = 10,
+    ) -> None:
+        def _set_defaults(opts: t.Dict[str, t.Any]) -> t.Dict[str, t.Any]:
+            opts.setdefault("remove_prefix", False)
+            opts.setdefault("host", "")
+            opts.setdefault("headers", {})
+            opts.setdefault("ssl_context", None)
+            return opts
+
+        self.app = app
+        self.targets = {
+            f"/{k.strip('/')}/": _set_defaults(v) for k, v in targets.items()
+        }
+        self.chunk_size = chunk_size
+        self.timeout = timeout
+
+    def proxy_to(
+        self, opts: t.Dict[str, t.Any], path: str, prefix: str
+    ) -> "WSGIApplication":
+        target = url_parse(opts["target"])
+        host = t.cast(str, target.ascii_host)
+
+        def application(
+            environ: "WSGIEnvironment", start_response: "StartResponse"
+        ) -> t.Iterable[bytes]:
+            headers = list(EnvironHeaders(environ).items())
+            headers[:] = [
+                (k, v)
+                for k, v in headers
+                if not is_hop_by_hop_header(k)
+                and k.lower() not in ("content-length", "host")
+            ]
+            headers.append(("Connection", "close"))
+
+            if opts["host"] == "":
+                headers.append(("Host", host))
+            elif opts["host"] is None:
+                headers.append(("Host", environ["HTTP_HOST"]))
+            else:
+                headers.append(("Host", opts["host"]))
+
+            headers.extend(opts["headers"].items())
+            remote_path = path
+
+            if opts["remove_prefix"]:
+                remote_path = remote_path[len(prefix) :].lstrip("/")
+                remote_path = f"{target.path.rstrip('/')}/{remote_path}"
+
+            content_length = environ.get("CONTENT_LENGTH")
+            chunked = False
+
+            if content_length not in ("", None):
+                headers.append(("Content-Length", content_length))  # type: ignore
+            elif content_length is not None:
+                headers.append(("Transfer-Encoding", "chunked"))
+                chunked = True
+
+            try:
+                if target.scheme == "http":
+                    con = client.HTTPConnection(
+                        host, target.port or 80, timeout=self.timeout
+                    )
+                elif target.scheme == "https":
+                    con = client.HTTPSConnection(
+                        host,
+                        target.port or 443,
+                        timeout=self.timeout,
+                        context=opts["ssl_context"],
+                    )
+                else:
+                    raise RuntimeError(
+                        "Target scheme must be 'http' or 'https', got"
+                        f" {target.scheme!r}."
+                    )
+
+                con.connect()
+                remote_url = url_quote(remote_path)
+                querystring = environ["QUERY_STRING"]
+
+                if querystring:
+                    remote_url = f"{remote_url}?{querystring}"
+
+                con.putrequest(environ["REQUEST_METHOD"], remote_url, skip_host=True)
+
+                for k, v in headers:
+                    if k.lower() == "connection":
+                        v = "close"
+
+                    con.putheader(k, v)
+
+                con.endheaders()
+                stream = get_input_stream(environ)
+
+                while True:
+                    data = stream.read(self.chunk_size)
+
+                    if not data:
+                        break
+
+                    if chunked:
+                        con.send(b"%x\r\n%s\r\n" % (len(data), data))
+                    else:
+                        con.send(data)
+
+                resp = con.getresponse()
+            except OSError:
+                from ..exceptions import BadGateway
+
+                return BadGateway()(environ, start_response)
+
+            start_response(
+                f"{resp.status} {resp.reason}",
+                [
+                    (k.title(), v)
+                    for k, v in resp.getheaders()
+                    if not is_hop_by_hop_header(k)
+                ],
+            )
+
+            def read() -> t.Iterator[bytes]:
+                while True:
+                    try:
+                        data = resp.read(self.chunk_size)
+                    except OSError:
+                        break
+
+                    if not data:
+                        break
+
+                    yield data
+
+            return read()
+
+        return application
+
+    def __call__(
+        self, environ: "WSGIEnvironment", start_response: "StartResponse"
+    ) -> t.Iterable[bytes]:
+        path = environ["PATH_INFO"]
+        app = self.app
+
+        for prefix, opts in self.targets.items():
+            if path.startswith(prefix):
+                app = self.proxy_to(opts, path, prefix)
+                break
+
+        return app(environ, start_response)
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/middleware/lint.py b/.venv/lib/python3.6/site-packages/werkzeug/middleware/lint.py
new file mode 100644
index 0000000..c74703b
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/middleware/lint.py
@@ -0,0 +1,420 @@
+"""
+WSGI Protocol Linter
+====================
+
+This module provides a middleware that performs sanity checks on the
+behavior of the WSGI server and application. It checks that the
+:pep:`3333` WSGI spec is properly implemented. It also warns on some
+common HTTP errors such as non-empty responses for 304 status codes.
+
+.. autoclass:: LintMiddleware
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+import typing as t
+from types import TracebackType
+from urllib.parse import urlparse
+from warnings import warn
+
+from ..datastructures import Headers
+from ..http import is_entity_header
+from ..wsgi import FileWrapper
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import StartResponse
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+
+
+class WSGIWarning(Warning):
+    """Warning class for WSGI warnings."""
+
+
+class HTTPWarning(Warning):
+    """Warning class for HTTP warnings."""
+
+
+def check_type(context: str, obj: object, need: t.Type = str) -> None:
+    if type(obj) is not need:
+        warn(
+            f"{context!r} requires {need.__name__!r}, got {type(obj).__name__!r}.",
+            WSGIWarning,
+            stacklevel=3,
+        )
+
+
+class InputStream:
+    def __init__(self, stream: t.IO[bytes]) -> None:
+        self._stream = stream
+
+    def read(self, *args: t.Any) -> bytes:
+        if len(args) == 0:
+            warn(
+                "WSGI does not guarantee an EOF marker on the input stream, thus making"
+                " calls to 'wsgi.input.read()' unsafe. Conforming servers may never"
+                " return from this call.",
+                WSGIWarning,
+                stacklevel=2,
+            )
+        elif len(args) != 1:
+            warn(
+                "Too many parameters passed to 'wsgi.input.read()'.",
+                WSGIWarning,
+                stacklevel=2,
+            )
+        return self._stream.read(*args)
+
+    def readline(self, *args: t.Any) -> bytes:
+        if len(args) == 0:
+            warn(
+                "Calls to 'wsgi.input.readline()' without arguments are unsafe. Use"
+                " 'wsgi.input.read()' instead.",
+                WSGIWarning,
+                stacklevel=2,
+            )
+        elif len(args) == 1:
+            warn(
+                "'wsgi.input.readline()' was called with a size hint. WSGI does not"
+                " support this, although it's available on all major servers.",
+                WSGIWarning,
+                stacklevel=2,
+            )
+        else:
+            raise TypeError("Too many arguments passed to 'wsgi.input.readline()'.")
+        return self._stream.readline(*args)
+
+    def __iter__(self) -> t.Iterator[bytes]:
+        try:
+            return iter(self._stream)
+        except TypeError:
+            warn("'wsgi.input' is not iterable.", WSGIWarning, stacklevel=2)
+            return iter(())
+
+    def close(self) -> None:
+        warn("The application closed the input stream!", WSGIWarning, stacklevel=2)
+        self._stream.close()
+
+
+class ErrorStream:
+    def __init__(self, stream: t.IO[str]) -> None:
+        self._stream = stream
+
+    def write(self, s: str) -> None:
+        check_type("wsgi.error.write()", s, str)
+        self._stream.write(s)
+
+    def flush(self) -> None:
+        self._stream.flush()
+
+    def writelines(self, seq: t.Iterable[str]) -> None:
+        for line in seq:
+            self.write(line)
+
+    def close(self) -> None:
+        warn("The application closed the error stream!", WSGIWarning, stacklevel=2)
+        self._stream.close()
+
+
+class GuardedWrite:
+    def __init__(self, write: t.Callable[[bytes], None], chunks: t.List[int]) -> None:
+        self._write = write
+        self._chunks = chunks
+
+    def __call__(self, s: bytes) -> None:
+        check_type("write()", s, bytes)
+        self._write(s)
+        self._chunks.append(len(s))
+
+
+class GuardedIterator:
+    def __init__(
+        self,
+        iterator: t.Iterable[bytes],
+        headers_set: t.Tuple[int, Headers],
+        chunks: t.List[int],
+    ) -> None:
+        self._iterator = iterator
+        self._next = iter(iterator).__next__
+        self.closed = False
+        self.headers_set = headers_set
+        self.chunks = chunks
+
+    def __iter__(self) -> "GuardedIterator":
+        return self
+
+    def __next__(self) -> bytes:
+        if self.closed:
+            warn("Iterated over closed 'app_iter'.", WSGIWarning, stacklevel=2)
+
+        rv = self._next()
+
+        if not self.headers_set:
+            warn(
+                "The application returned before it started the response.",
+                WSGIWarning,
+                stacklevel=2,
+            )
+
+        check_type("application iterator items", rv, bytes)
+        self.chunks.append(len(rv))
+        return rv
+
+    def close(self) -> None:
+        self.closed = True
+
+        if hasattr(self._iterator, "close"):
+            self._iterator.close()  # type: ignore
+
+        if self.headers_set:
+            status_code, headers = self.headers_set
+            bytes_sent = sum(self.chunks)
+            content_length = headers.get("content-length", type=int)
+
+            if status_code == 304:
+                for key, _value in headers:
+                    key = key.lower()
+                    if key not in ("expires", "content-location") and is_entity_header(
+                        key
+                    ):
+                        warn(
+                            f"Entity header {key!r} found in 304 response.", HTTPWarning
+                        )
+                if bytes_sent:
+                    warn("304 responses must not have a body.", HTTPWarning)
+            elif 100 <= status_code < 200 or status_code == 204:
+                if content_length != 0:
+                    warn(
+                        f"{status_code} responses must have an empty content length.",
+                        HTTPWarning,
+                    )
+                if bytes_sent:
+                    warn(f"{status_code} responses must not have a body.", HTTPWarning)
+            elif content_length is not None and content_length != bytes_sent:
+                warn(
+                    "Content-Length and the number of bytes sent to the"
+                    " client do not match.",
+                    WSGIWarning,
+                )
+
+    def __del__(self) -> None:
+        if not self.closed:
+            try:
+                warn(
+                    "Iterator was garbage collected before it was closed.", WSGIWarning
+                )
+            except Exception:
+                pass
+
+
+class LintMiddleware:
+    """Warns about common errors in the WSGI and HTTP behavior of the
+    server and wrapped application. Some of the issues it checks are:
+
+    -   invalid status codes
+    -   non-bytes sent to the WSGI server
+    -   strings returned from the WSGI application
+    -   non-empty conditional responses
+    -   unquoted etags
+    -   relative URLs in the Location header
+    -   unsafe calls to wsgi.input
+    -   unclosed iterators
+
+    Error information is emitted using the :mod:`warnings` module.
+
+    :param app: The WSGI application to wrap.
+
+    .. code-block:: python
+
+        from werkzeug.middleware.lint import LintMiddleware
+        app = LintMiddleware(app)
+    """
+
+    def __init__(self, app: "WSGIApplication") -> None:
+        self.app = app
+
+    def check_environ(self, environ: "WSGIEnvironment") -> None:
+        if type(environ) is not dict:
+            warn(
+                "WSGI environment is not a standard Python dict.",
+                WSGIWarning,
+                stacklevel=4,
+            )
+        for key in (
+            "REQUEST_METHOD",
+            "SERVER_NAME",
+            "SERVER_PORT",
+            "wsgi.version",
+            "wsgi.input",
+            "wsgi.errors",
+            "wsgi.multithread",
+            "wsgi.multiprocess",
+            "wsgi.run_once",
+        ):
+            if key not in environ:
+                warn(
+                    f"Required environment key {key!r} not found",
+                    WSGIWarning,
+                    stacklevel=3,
+                )
+        if environ["wsgi.version"] != (1, 0):
+            warn("Environ is not a WSGI 1.0 environ.", WSGIWarning, stacklevel=3)
+
+        script_name = environ.get("SCRIPT_NAME", "")
+        path_info = environ.get("PATH_INFO", "")
+
+        if script_name and script_name[0] != "/":
+            warn(
+                f"'SCRIPT_NAME' does not start with a slash: {script_name!r}",
+                WSGIWarning,
+                stacklevel=3,
+            )
+
+        if path_info and path_info[0] != "/":
+            warn(
+                f"'PATH_INFO' does not start with a slash: {path_info!r}",
+                WSGIWarning,
+                stacklevel=3,
+            )
+
+    def check_start_response(
+        self,
+        status: str,
+        headers: t.List[t.Tuple[str, str]],
+        exc_info: t.Optional[
+            t.Tuple[t.Type[BaseException], BaseException, TracebackType]
+        ],
+    ) -> t.Tuple[int, Headers]:
+        check_type("status", status, str)
+        status_code_str = status.split(None, 1)[0]
+
+        if len(status_code_str) != 3 or not status_code_str.isdigit():
+            warn("Status code must be three digits.", WSGIWarning, stacklevel=3)
+
+        if len(status) < 4 or status[3] != " ":
+            warn(
+                f"Invalid value for status {status!r}. Valid status strings are three"
+                " digits, a space and a status explanation.",
+                WSGIWarning,
+                stacklevel=3,
+            )
+
+        status_code = int(status_code_str)
+
+        if status_code < 100:
+            warn("Status code < 100 detected.", WSGIWarning, stacklevel=3)
+
+        if type(headers) is not list:
+            warn("Header list is not a list.", WSGIWarning, stacklevel=3)
+
+        for item in headers:
+            if type(item) is not tuple or len(item) != 2:
+                warn("Header items must be 2-item tuples.", WSGIWarning, stacklevel=3)
+            name, value = item
+            if type(name) is not str or type(value) is not str:
+                warn(
+                    "Header keys and values must be strings.", WSGIWarning, stacklevel=3
+                )
+            if name.lower() == "status":
+                warn(
+                    "The status header is not supported due to"
+                    " conflicts with the CGI spec.",
+                    WSGIWarning,
+                    stacklevel=3,
+                )
+
+        if exc_info is not None and not isinstance(exc_info, tuple):
+            warn("Invalid value for exc_info.", WSGIWarning, stacklevel=3)
+
+        headers = Headers(headers)
+        self.check_headers(headers)
+
+        return status_code, headers
+
+    def check_headers(self, headers: Headers) -> None:
+        etag = headers.get("etag")
+
+        if etag is not None:
+            if etag.startswith(("W/", "w/")):
+                if etag.startswith("w/"):
+                    warn(
+                        "Weak etag indicator should be upper case.",
+                        HTTPWarning,
+                        stacklevel=4,
+                    )
+
+                etag = etag[2:]
+
+            if not (etag[:1] == etag[-1:] == '"'):
+                warn("Unquoted etag emitted.", HTTPWarning, stacklevel=4)
+
+        location = headers.get("location")
+
+        if location is not None:
+            if not urlparse(location).netloc:
+                warn(
+                    "Absolute URLs required for location header.",
+                    HTTPWarning,
+                    stacklevel=4,
+                )
+
+    def check_iterator(self, app_iter: t.Iterable[bytes]) -> None:
+        if isinstance(app_iter, bytes):
+            warn(
+                "The application returned a bytestring. The response will send one"
+                " character at a time to the client, which will kill performance."
+                " Return a list or iterable instead.",
+                WSGIWarning,
+                stacklevel=3,
+            )
+
+    def __call__(self, *args: t.Any, **kwargs: t.Any) -> t.Iterable[bytes]:
+        if len(args) != 2:
+            warn("A WSGI app takes two arguments.", WSGIWarning, stacklevel=2)
+
+        if kwargs:
+            warn(
+                "A WSGI app does not take keyword arguments.", WSGIWarning, stacklevel=2
+            )
+
+        environ: "WSGIEnvironment" = args[0]
+        start_response: "StartResponse" = args[1]
+
+        self.check_environ(environ)
+        environ["wsgi.input"] = InputStream(environ["wsgi.input"])
+        environ["wsgi.errors"] = ErrorStream(environ["wsgi.errors"])
+
+        # Hook our own file wrapper in so that applications will always
+        # iterate to the end and we can check the content length.
+        environ["wsgi.file_wrapper"] = FileWrapper
+
+        headers_set: t.List[t.Any] = []
+        chunks: t.List[int] = []
+
+        def checking_start_response(
+            *args: t.Any, **kwargs: t.Any
+        ) -> t.Callable[[bytes], None]:
+            if len(args) not in {2, 3}:
+                warn(
+                    f"Invalid number of arguments: {len(args)}, expected 2 or 3.",
+                    WSGIWarning,
+                    stacklevel=2,
+                )
+
+            if kwargs:
+                warn("'start_response' does not take keyword arguments.", WSGIWarning)
+
+            status: str = args[0]
+            headers: t.List[t.Tuple[str, str]] = args[1]
+            exc_info: t.Optional[
+                t.Tuple[t.Type[BaseException], BaseException, TracebackType]
+            ] = (args[2] if len(args) == 3 else None)
+
+            headers_set[:] = self.check_start_response(status, headers, exc_info)
+            return GuardedWrite(start_response(status, headers, exc_info), chunks)
+
+        app_iter = self.app(environ, t.cast("StartResponse", checking_start_response))
+        self.check_iterator(app_iter)
+        return GuardedIterator(
+            app_iter, t.cast(t.Tuple[int, Headers], headers_set), chunks
+        )
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/middleware/profiler.py b/.venv/lib/python3.6/site-packages/werkzeug/middleware/profiler.py
new file mode 100644
index 0000000..200dae0
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/middleware/profiler.py
@@ -0,0 +1,139 @@
+"""
+Application Profiler
+====================
+
+This module provides a middleware that profiles each request with the
+:mod:`cProfile` module. This can help identify bottlenecks in your code
+that may be slowing down your application.
+
+.. autoclass:: ProfilerMiddleware
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+import os.path
+import sys
+import time
+import typing as t
+from pstats import Stats
+
+try:
+    from cProfile import Profile
+except ImportError:
+    from profile import Profile  # type: ignore
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import StartResponse
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+
+
+class ProfilerMiddleware:
+    """Wrap a WSGI application and profile the execution of each
+    request. Responses are buffered so that timings are more exact.
+
+    If ``stream`` is given, :class:`pstats.Stats` are written to it
+    after each request. If ``profile_dir`` is given, :mod:`cProfile`
+    data files are saved to that directory, one file per request.
+
+    The filename can be customized by passing ``filename_format``. If
+    it is a string, it will be formatted using :meth:`str.format` with
+    the following fields available:
+
+    -   ``{method}`` - The request method; GET, POST, etc.
+    -   ``{path}`` - The request path or 'root' should one not exist.
+    -   ``{elapsed}`` - The elapsed time of the request.
+    -   ``{time}`` - The time of the request.
+
+    If it is a callable, it will be called with the WSGI ``environ``
+    dict and should return a filename.
+
+    :param app: The WSGI application to wrap.
+    :param stream: Write stats to this stream. Disable with ``None``.
+    :param sort_by: A tuple of columns to sort stats by. See
+        :meth:`pstats.Stats.sort_stats`.
+    :param restrictions: A tuple of restrictions to filter stats by. See
+        :meth:`pstats.Stats.print_stats`.
+    :param profile_dir: Save profile data files to this directory.
+    :param filename_format: Format string for profile data file names,
+        or a callable returning a name. See explanation above.
+
+    .. code-block:: python
+
+        from werkzeug.middleware.profiler import ProfilerMiddleware
+        app = ProfilerMiddleware(app)
+
+    .. versionchanged:: 0.15
+        Stats are written even if ``profile_dir`` is given, and can be
+        disable by passing ``stream=None``.
+
+    .. versionadded:: 0.15
+        Added ``filename_format``.
+
+    .. versionadded:: 0.9
+        Added ``restrictions`` and ``profile_dir``.
+    """
+
+    def __init__(
+        self,
+        app: "WSGIApplication",
+        stream: t.IO[str] = sys.stdout,
+        sort_by: t.Iterable[str] = ("time", "calls"),
+        restrictions: t.Iterable[t.Union[str, int, float]] = (),
+        profile_dir: t.Optional[str] = None,
+        filename_format: str = "{method}.{path}.{elapsed:.0f}ms.{time:.0f}.prof",
+    ) -> None:
+        self._app = app
+        self._stream = stream
+        self._sort_by = sort_by
+        self._restrictions = restrictions
+        self._profile_dir = profile_dir
+        self._filename_format = filename_format
+
+    def __call__(
+        self, environ: "WSGIEnvironment", start_response: "StartResponse"
+    ) -> t.Iterable[bytes]:
+        response_body: t.List[bytes] = []
+
+        def catching_start_response(status, headers, exc_info=None):  # type: ignore
+            start_response(status, headers, exc_info)
+            return response_body.append
+
+        def runapp() -> None:
+            app_iter = self._app(
+                environ, t.cast("StartResponse", catching_start_response)
+            )
+            response_body.extend(app_iter)
+
+            if hasattr(app_iter, "close"):
+                app_iter.close()  # type: ignore
+
+        profile = Profile()
+        start = time.time()
+        profile.runcall(runapp)
+        body = b"".join(response_body)
+        elapsed = time.time() - start
+
+        if self._profile_dir is not None:
+            if callable(self._filename_format):
+                filename = self._filename_format(environ)
+            else:
+                filename = self._filename_format.format(
+                    method=environ["REQUEST_METHOD"],
+                    path=environ["PATH_INFO"].strip("/").replace("/", ".") or "root",
+                    elapsed=elapsed * 1000.0,
+                    time=time.time(),
+                )
+            filename = os.path.join(self._profile_dir, filename)
+            profile.dump_stats(filename)
+
+        if self._stream is not None:
+            stats = Stats(profile, stream=self._stream)
+            stats.sort_stats(*self._sort_by)
+            print("-" * 80, file=self._stream)
+            path_info = environ.get("PATH_INFO", "")
+            print(f"PATH: {path_info!r}", file=self._stream)
+            stats.print_stats(*self._restrictions)
+            print(f"{'-' * 80}\n", file=self._stream)
+
+        return [body]
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/middleware/proxy_fix.py b/.venv/lib/python3.6/site-packages/werkzeug/middleware/proxy_fix.py
new file mode 100644
index 0000000..e90b1b3
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/middleware/proxy_fix.py
@@ -0,0 +1,187 @@
+"""
+X-Forwarded-For Proxy Fix
+=========================
+
+This module provides a middleware that adjusts the WSGI environ based on
+``X-Forwarded-`` headers that proxies in front of an application may
+set.
+
+When an application is running behind a proxy server, WSGI may see the
+request as coming from that server rather than the real client. Proxies
+set various headers to track where the request actually came from.
+
+This middleware should only be used if the application is actually
+behind such a proxy, and should be configured with the number of proxies
+that are chained in front of it. Not all proxies set all the headers.
+Since incoming headers can be faked, you must set how many proxies are
+setting each header so the middleware knows what to trust.
+
+.. autoclass:: ProxyFix
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+import typing as t
+
+from ..http import parse_list_header
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import StartResponse
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+
+
+class ProxyFix:
+    """Adjust the WSGI environ based on ``X-Forwarded-`` that proxies in
+    front of the application may set.
+
+    -   ``X-Forwarded-For`` sets ``REMOTE_ADDR``.
+    -   ``X-Forwarded-Proto`` sets ``wsgi.url_scheme``.
+    -   ``X-Forwarded-Host`` sets ``HTTP_HOST``, ``SERVER_NAME``, and
+        ``SERVER_PORT``.
+    -   ``X-Forwarded-Port`` sets ``HTTP_HOST`` and ``SERVER_PORT``.
+    -   ``X-Forwarded-Prefix`` sets ``SCRIPT_NAME``.
+
+    You must tell the middleware how many proxies set each header so it
+    knows what values to trust. It is a security issue to trust values
+    that came from the client rather than a proxy.
+
+    The original values of the headers are stored in the WSGI
+    environ as ``werkzeug.proxy_fix.orig``, a dict.
+
+    :param app: The WSGI application to wrap.
+    :param x_for: Number of values to trust for ``X-Forwarded-For``.
+    :param x_proto: Number of values to trust for ``X-Forwarded-Proto``.
+    :param x_host: Number of values to trust for ``X-Forwarded-Host``.
+    :param x_port: Number of values to trust for ``X-Forwarded-Port``.
+    :param x_prefix: Number of values to trust for
+        ``X-Forwarded-Prefix``.
+
+    .. code-block:: python
+
+        from werkzeug.middleware.proxy_fix import ProxyFix
+        # App is behind one proxy that sets the -For and -Host headers.
+        app = ProxyFix(app, x_for=1, x_host=1)
+
+    .. versionchanged:: 1.0
+        Deprecated code has been removed:
+
+        *   The ``num_proxies`` argument and attribute.
+        *   The ``get_remote_addr`` method.
+        *   The environ keys ``orig_remote_addr``,
+            ``orig_wsgi_url_scheme``, and ``orig_http_host``.
+
+    .. versionchanged:: 0.15
+        All headers support multiple values. The ``num_proxies``
+        argument is deprecated. Each header is configured with a
+        separate number of trusted proxies.
+
+    .. versionchanged:: 0.15
+        Original WSGI environ values are stored in the
+        ``werkzeug.proxy_fix.orig`` dict. ``orig_remote_addr``,
+        ``orig_wsgi_url_scheme``, and ``orig_http_host`` are deprecated
+        and will be removed in 1.0.
+
+    .. versionchanged:: 0.15
+        Support ``X-Forwarded-Port`` and ``X-Forwarded-Prefix``.
+
+    .. versionchanged:: 0.15
+        ``X-Forwarded-Host`` and ``X-Forwarded-Port`` modify
+        ``SERVER_NAME`` and ``SERVER_PORT``.
+    """
+
+    def __init__(
+        self,
+        app: "WSGIApplication",
+        x_for: int = 1,
+        x_proto: int = 1,
+        x_host: int = 0,
+        x_port: int = 0,
+        x_prefix: int = 0,
+    ) -> None:
+        self.app = app
+        self.x_for = x_for
+        self.x_proto = x_proto
+        self.x_host = x_host
+        self.x_port = x_port
+        self.x_prefix = x_prefix
+
+    def _get_real_value(self, trusted: int, value: t.Optional[str]) -> t.Optional[str]:
+        """Get the real value from a list header based on the configured
+        number of trusted proxies.
+
+        :param trusted: Number of values to trust in the header.
+        :param value: Comma separated list header value to parse.
+        :return: The real value, or ``None`` if there are fewer values
+            than the number of trusted proxies.
+
+        .. versionchanged:: 1.0
+            Renamed from ``_get_trusted_comma``.
+
+        .. versionadded:: 0.15
+        """
+        if not (trusted and value):
+            return None
+        values = parse_list_header(value)
+        if len(values) >= trusted:
+            return values[-trusted]
+        return None
+
+    def __call__(
+        self, environ: "WSGIEnvironment", start_response: "StartResponse"
+    ) -> t.Iterable[bytes]:
+        """Modify the WSGI environ based on the various ``Forwarded``
+        headers before calling the wrapped application. Store the
+        original environ values in ``werkzeug.proxy_fix.orig_{key}``.
+        """
+        environ_get = environ.get
+        orig_remote_addr = environ_get("REMOTE_ADDR")
+        orig_wsgi_url_scheme = environ_get("wsgi.url_scheme")
+        orig_http_host = environ_get("HTTP_HOST")
+        environ.update(
+            {
+                "werkzeug.proxy_fix.orig": {
+                    "REMOTE_ADDR": orig_remote_addr,
+                    "wsgi.url_scheme": orig_wsgi_url_scheme,
+                    "HTTP_HOST": orig_http_host,
+                    "SERVER_NAME": environ_get("SERVER_NAME"),
+                    "SERVER_PORT": environ_get("SERVER_PORT"),
+                    "SCRIPT_NAME": environ_get("SCRIPT_NAME"),
+                }
+            }
+        )
+
+        x_for = self._get_real_value(self.x_for, environ_get("HTTP_X_FORWARDED_FOR"))
+        if x_for:
+            environ["REMOTE_ADDR"] = x_for
+
+        x_proto = self._get_real_value(
+            self.x_proto, environ_get("HTTP_X_FORWARDED_PROTO")
+        )
+        if x_proto:
+            environ["wsgi.url_scheme"] = x_proto
+
+        x_host = self._get_real_value(self.x_host, environ_get("HTTP_X_FORWARDED_HOST"))
+        if x_host:
+            environ["HTTP_HOST"] = x_host
+            parts = x_host.split(":", 1)
+            environ["SERVER_NAME"] = parts[0]
+            if len(parts) == 2:
+                environ["SERVER_PORT"] = parts[1]
+
+        x_port = self._get_real_value(self.x_port, environ_get("HTTP_X_FORWARDED_PORT"))
+        if x_port:
+            host = environ.get("HTTP_HOST")
+            if host:
+                parts = host.split(":", 1)
+                host = parts[0] if len(parts) == 2 else host
+                environ["HTTP_HOST"] = f"{host}:{x_port}"
+            environ["SERVER_PORT"] = x_port
+
+        x_prefix = self._get_real_value(
+            self.x_prefix, environ_get("HTTP_X_FORWARDED_PREFIX")
+        )
+        if x_prefix:
+            environ["SCRIPT_NAME"] = x_prefix
+
+        return self.app(environ, start_response)
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/middleware/shared_data.py b/.venv/lib/python3.6/site-packages/werkzeug/middleware/shared_data.py
new file mode 100644
index 0000000..62da672
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/middleware/shared_data.py
@@ -0,0 +1,320 @@
+"""
+Serve Shared Static Files
+=========================
+
+.. autoclass:: SharedDataMiddleware
+    :members: is_allowed
+
+:copyright: 2007 Pallets
+:license: BSD-3-Clause
+"""
+import mimetypes
+import os
+import pkgutil
+import posixpath
+import typing as t
+from datetime import datetime
+from datetime import timezone
+from io import BytesIO
+from time import time
+from zlib import adler32
+
+from ..filesystem import get_filesystem_encoding
+from ..http import http_date
+from ..http import is_resource_modified
+from ..security import safe_join
+from ..utils import get_content_type
+from ..wsgi import get_path_info
+from ..wsgi import wrap_file
+
+_TOpener = t.Callable[[], t.Tuple[t.IO[bytes], datetime, int]]
+_TLoader = t.Callable[[t.Optional[str]], t.Tuple[t.Optional[str], t.Optional[_TOpener]]]
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import StartResponse
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+
+
+class SharedDataMiddleware:
+
+    """A WSGI middleware which provides static content for development
+    environments or simple server setups. Its usage is quite simple::
+
+        import os
+        from werkzeug.middleware.shared_data import SharedDataMiddleware
+
+        app = SharedDataMiddleware(app, {
+            '/shared': os.path.join(os.path.dirname(__file__), 'shared')
+        })
+
+    The contents of the folder ``./shared`` will now be available on
+    ``http://example.com/shared/``.  This is pretty useful during development
+    because a standalone media server is not required. Files can also be
+    mounted on the root folder and still continue to use the application because
+    the shared data middleware forwards all unhandled requests to the
+    application, even if the requests are below one of the shared folders.
+
+    If `pkg_resources` is available you can also tell the middleware to serve
+    files from package data::
+
+        app = SharedDataMiddleware(app, {
+            '/static': ('myapplication', 'static')
+        })
+
+    This will then serve the ``static`` folder in the `myapplication`
+    Python package.
+
+    The optional `disallow` parameter can be a list of :func:`~fnmatch.fnmatch`
+    rules for files that are not accessible from the web.  If `cache` is set to
+    `False` no caching headers are sent.
+
+    Currently the middleware does not support non-ASCII filenames. If the
+    encoding on the file system happens to match the encoding of the URI it may
+    work but this could also be by accident. We strongly suggest using ASCII
+    only file names for static files.
+
+    The middleware will guess the mimetype using the Python `mimetype`
+    module.  If it's unable to figure out the charset it will fall back
+    to `fallback_mimetype`.
+
+    :param app: the application to wrap.  If you don't want to wrap an
+                application you can pass it :exc:`NotFound`.
+    :param exports: a list or dict of exported files and folders.
+    :param disallow: a list of :func:`~fnmatch.fnmatch` rules.
+    :param cache: enable or disable caching headers.
+    :param cache_timeout: the cache timeout in seconds for the headers.
+    :param fallback_mimetype: The fallback mimetype for unknown files.
+
+    .. versionchanged:: 1.0
+        The default ``fallback_mimetype`` is
+        ``application/octet-stream``. If a filename looks like a text
+        mimetype, the ``utf-8`` charset is added to it.
+
+    .. versionadded:: 0.6
+        Added ``fallback_mimetype``.
+
+    .. versionchanged:: 0.5
+        Added ``cache_timeout``.
+    """
+
+    def __init__(
+        self,
+        app: "WSGIApplication",
+        exports: t.Union[
+            t.Dict[str, t.Union[str, t.Tuple[str, str]]],
+            t.Iterable[t.Tuple[str, t.Union[str, t.Tuple[str, str]]]],
+        ],
+        disallow: None = None,
+        cache: bool = True,
+        cache_timeout: int = 60 * 60 * 12,
+        fallback_mimetype: str = "application/octet-stream",
+    ) -> None:
+        self.app = app
+        self.exports: t.List[t.Tuple[str, _TLoader]] = []
+        self.cache = cache
+        self.cache_timeout = cache_timeout
+
+        if isinstance(exports, dict):
+            exports = exports.items()
+
+        for key, value in exports:
+            if isinstance(value, tuple):
+                loader = self.get_package_loader(*value)
+            elif isinstance(value, str):
+                if os.path.isfile(value):
+                    loader = self.get_file_loader(value)
+                else:
+                    loader = self.get_directory_loader(value)
+            else:
+                raise TypeError(f"unknown def {value!r}")
+
+            self.exports.append((key, loader))
+
+        if disallow is not None:
+            from fnmatch import fnmatch
+
+            self.is_allowed = lambda x: not fnmatch(x, disallow)
+
+        self.fallback_mimetype = fallback_mimetype
+
+    def is_allowed(self, filename: str) -> bool:
+        """Subclasses can override this method to disallow the access to
+        certain files.  However by providing `disallow` in the constructor
+        this method is overwritten.
+        """
+        return True
+
+    def _opener(self, filename: str) -> _TOpener:
+        return lambda: (
+            open(filename, "rb"),
+            datetime.fromtimestamp(os.path.getmtime(filename), tz=timezone.utc),
+            int(os.path.getsize(filename)),
+        )
+
+    def get_file_loader(self, filename: str) -> _TLoader:
+        return lambda x: (os.path.basename(filename), self._opener(filename))
+
+    def get_package_loader(self, package: str, package_path: str) -> _TLoader:
+        load_time = datetime.now(timezone.utc)
+        provider = pkgutil.get_loader(package)
+
+        if hasattr(provider, "get_resource_reader"):
+            # Python 3
+            reader = provider.get_resource_reader(package)  # type: ignore
+
+            def loader(
+                path: t.Optional[str],
+            ) -> t.Tuple[t.Optional[str], t.Optional[_TOpener]]:
+                if path is None:
+                    return None, None
+
+                path = safe_join(package_path, path)
+
+                if path is None:
+                    return None, None
+
+                basename = posixpath.basename(path)
+
+                try:
+                    resource = reader.open_resource(path)
+                except OSError:
+                    return None, None
+
+                if isinstance(resource, BytesIO):
+                    return (
+                        basename,
+                        lambda: (resource, load_time, len(resource.getvalue())),
+                    )
+
+                return (
+                    basename,
+                    lambda: (
+                        resource,
+                        datetime.fromtimestamp(
+                            os.path.getmtime(resource.name), tz=timezone.utc
+                        ),
+                        os.path.getsize(resource.name),
+                    ),
+                )
+
+        else:
+            # Python 3.6
+            package_filename = provider.get_filename(package)  # type: ignore
+            is_filesystem = os.path.exists(package_filename)
+            root = os.path.join(os.path.dirname(package_filename), package_path)
+
+            def loader(
+                path: t.Optional[str],
+            ) -> t.Tuple[t.Optional[str], t.Optional[_TOpener]]:
+                if path is None:
+                    return None, None
+
+                path = safe_join(root, path)
+
+                if path is None:
+                    return None, None
+
+                basename = posixpath.basename(path)
+
+                if is_filesystem:
+                    if not os.path.isfile(path):
+                        return None, None
+
+                    return basename, self._opener(path)
+
+                try:
+                    data = provider.get_data(path)  # type: ignore
+                except OSError:
+                    return None, None
+
+                return basename, lambda: (BytesIO(data), load_time, len(data))
+
+        return loader
+
+    def get_directory_loader(self, directory: str) -> _TLoader:
+        def loader(
+            path: t.Optional[str],
+        ) -> t.Tuple[t.Optional[str], t.Optional[_TOpener]]:
+            if path is not None:
+                path = safe_join(directory, path)
+
+                if path is None:
+                    return None, None
+            else:
+                path = directory
+
+            if os.path.isfile(path):
+                return os.path.basename(path), self._opener(path)
+
+            return None, None
+
+        return loader
+
+    def generate_etag(self, mtime: datetime, file_size: int, real_filename: str) -> str:
+        if not isinstance(real_filename, bytes):
+            real_filename = real_filename.encode(  # type: ignore
+                get_filesystem_encoding()
+            )
+
+        timestamp = mtime.timestamp()
+        checksum = adler32(real_filename) & 0xFFFFFFFF  # type: ignore
+        return f"wzsdm-{timestamp}-{file_size}-{checksum}"
+
+    def __call__(
+        self, environ: "WSGIEnvironment", start_response: "StartResponse"
+    ) -> t.Iterable[bytes]:
+        path = get_path_info(environ)
+        file_loader = None
+
+        for search_path, loader in self.exports:
+            if search_path == path:
+                real_filename, file_loader = loader(None)
+
+                if file_loader is not None:
+                    break
+
+            if not search_path.endswith("/"):
+                search_path += "/"
+
+            if path.startswith(search_path):
+                real_filename, file_loader = loader(path[len(search_path) :])
+
+                if file_loader is not None:
+                    break
+
+        if file_loader is None or not self.is_allowed(real_filename):  # type: ignore
+            return self.app(environ, start_response)
+
+        guessed_type = mimetypes.guess_type(real_filename)  # type: ignore
+        mime_type = get_content_type(guessed_type[0] or self.fallback_mimetype, "utf-8")
+        f, mtime, file_size = file_loader()
+
+        headers = [("Date", http_date())]
+
+        if self.cache:
+            timeout = self.cache_timeout
+            etag = self.generate_etag(mtime, file_size, real_filename)  # type: ignore
+            headers += [
+                ("Etag", f'"{etag}"'),
+                ("Cache-Control", f"max-age={timeout}, public"),
+            ]
+
+            if not is_resource_modified(environ, etag, last_modified=mtime):
+                f.close()
+                start_response("304 Not Modified", headers)
+                return []
+
+            headers.append(("Expires", http_date(time() + timeout)))
+        else:
+            headers.append(("Cache-Control", "public"))
+
+        headers.extend(
+            (
+                ("Content-Type", mime_type),
+                ("Content-Length", str(file_size)),
+                ("Last-Modified", http_date(mtime)),
+            )
+        )
+        start_response("200 OK", headers)
+        return wrap_file(environ, f)
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/py.typed b/.venv/lib/python3.6/site-packages/werkzeug/py.typed
new file mode 100644
index 0000000..e69de29
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/routing.py b/.venv/lib/python3.6/site-packages/werkzeug/routing.py
new file mode 100644
index 0000000..ddb8ef9
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/routing.py
@@ -0,0 +1,2341 @@
+"""When it comes to combining multiple controller or view functions
+(however you want to call them) you need a dispatcher. A simple way
+would be applying regular expression tests on the ``PATH_INFO`` and
+calling registered callback functions that return the value then.
+
+This module implements a much more powerful system than simple regular
+expression matching because it can also convert values in the URLs and
+build URLs.
+
+Here a simple example that creates a URL map for an application with
+two subdomains (www and kb) and some URL rules:
+
+.. code-block:: python
+
+    m = Map([
+        # Static URLs
+        Rule('/', endpoint='static/index'),
+        Rule('/about', endpoint='static/about'),
+        Rule('/help', endpoint='static/help'),
+        # Knowledge Base
+        Subdomain('kb', [
+            Rule('/', endpoint='kb/index'),
+            Rule('/browse/', endpoint='kb/browse'),
+            Rule('/browse//', endpoint='kb/browse'),
+            Rule('/browse//', endpoint='kb/browse')
+        ])
+    ], default_subdomain='www')
+
+If the application doesn't use subdomains it's perfectly fine to not set
+the default subdomain and not use the `Subdomain` rule factory. The
+endpoint in the rules can be anything, for example import paths or
+unique identifiers. The WSGI application can use those endpoints to get the
+handler for that URL.  It doesn't have to be a string at all but it's
+recommended.
+
+Now it's possible to create a URL adapter for one of the subdomains and
+build URLs:
+
+.. code-block:: python
+
+    c = m.bind('example.com')
+
+    c.build("kb/browse", dict(id=42))
+    'http://kb.example.com/browse/42/'
+
+    c.build("kb/browse", dict())
+    'http://kb.example.com/browse/'
+
+    c.build("kb/browse", dict(id=42, page=3))
+    'http://kb.example.com/browse/42/3'
+
+    c.build("static/about")
+    '/about'
+
+    c.build("static/index", force_external=True)
+    'http://www.example.com/'
+
+    c = m.bind('example.com', subdomain='kb')
+
+    c.build("static/about")
+    'http://www.example.com/about'
+
+The first argument to bind is the server name *without* the subdomain.
+Per default it will assume that the script is mounted on the root, but
+often that's not the case so you can provide the real mount point as
+second argument:
+
+.. code-block:: python
+
+    c = m.bind('example.com', '/applications/example')
+
+The third argument can be the subdomain, if not given the default
+subdomain is used.  For more details about binding have a look at the
+documentation of the `MapAdapter`.
+
+And here is how you can match URLs:
+
+.. code-block:: python
+
+    c = m.bind('example.com')
+
+    c.match("/")
+    ('static/index', {})
+
+    c.match("/about")
+    ('static/about', {})
+
+    c = m.bind('example.com', '/', 'kb')
+
+    c.match("/")
+    ('kb/index', {})
+
+    c.match("/browse/42/23")
+    ('kb/browse', {'id': 42, 'page': 23})
+
+If matching fails you get a ``NotFound`` exception, if the rule thinks
+it's a good idea to redirect (for example because the URL was defined
+to have a slash at the end but the request was missing that slash) it
+will raise a ``RequestRedirect`` exception. Both are subclasses of
+``HTTPException`` so you can use those errors as responses in the
+application.
+
+If matching succeeded but the URL rule was incompatible to the given
+method (for example there were only rules for ``GET`` and ``HEAD`` but
+routing tried to match a ``POST`` request) a ``MethodNotAllowed``
+exception is raised.
+"""
+import ast
+import difflib
+import posixpath
+import re
+import typing
+import typing as t
+import uuid
+import warnings
+from pprint import pformat
+from string import Template
+from threading import Lock
+from types import CodeType
+
+from ._internal import _encode_idna
+from ._internal import _get_environ
+from ._internal import _to_bytes
+from ._internal import _to_str
+from ._internal import _wsgi_decoding_dance
+from .datastructures import ImmutableDict
+from .datastructures import MultiDict
+from .exceptions import BadHost
+from .exceptions import BadRequest
+from .exceptions import HTTPException
+from .exceptions import MethodNotAllowed
+from .exceptions import NotFound
+from .urls import _fast_url_quote
+from .urls import url_encode
+from .urls import url_join
+from .urls import url_quote
+from .urls import url_unquote
+from .utils import cached_property
+from .utils import redirect
+from .wsgi import get_host
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+    from .wrappers.response import Response
+
+_rule_re = re.compile(
+    r"""
+    (?P[^<]*)                           # static rule data
+    <
+    (?:
+        (?P[a-zA-Z_][a-zA-Z0-9_]*)   # converter name
+        (?:\((?P.*?)\))?                  # converter arguments
+        \:                                      # variable delimiter
+    )?
+    (?P[a-zA-Z_][a-zA-Z0-9_]*)        # variable name
+    >
+    """,
+    re.VERBOSE,
+)
+_simple_rule_re = re.compile(r"<([^>]+)>")
+_converter_args_re = re.compile(
+    r"""
+    ((?P\w+)\s*=\s*)?
+    (?P
+        True|False|
+        \d+.\d+|
+        \d+.|
+        \d+|
+        [\w\d_.]+|
+        [urUR]?(?P"[^"]*?"|'[^']*')
+    )\s*,
+    """,
+    re.VERBOSE,
+)
+
+
+_PYTHON_CONSTANTS = {"None": None, "True": True, "False": False}
+
+
+def _pythonize(value: str) -> t.Union[None, bool, int, float, str]:
+    if value in _PYTHON_CONSTANTS:
+        return _PYTHON_CONSTANTS[value]
+    for convert in int, float:
+        try:
+            return convert(value)  # type: ignore
+        except ValueError:
+            pass
+    if value[:1] == value[-1:] and value[0] in "\"'":
+        value = value[1:-1]
+    return str(value)
+
+
+def parse_converter_args(argstr: str) -> t.Tuple[t.Tuple, t.Dict[str, t.Any]]:
+    argstr += ","
+    args = []
+    kwargs = {}
+
+    for item in _converter_args_re.finditer(argstr):
+        value = item.group("stringval")
+        if value is None:
+            value = item.group("value")
+        value = _pythonize(value)
+        if not item.group("name"):
+            args.append(value)
+        else:
+            name = item.group("name")
+            kwargs[name] = value
+
+    return tuple(args), kwargs
+
+
+def parse_rule(rule: str) -> t.Iterator[t.Tuple[t.Optional[str], t.Optional[str], str]]:
+    """Parse a rule and return it as generator. Each iteration yields tuples
+    in the form ``(converter, arguments, variable)``. If the converter is
+    `None` it's a static url part, otherwise it's a dynamic one.
+
+    :internal:
+    """
+    pos = 0
+    end = len(rule)
+    do_match = _rule_re.match
+    used_names = set()
+    while pos < end:
+        m = do_match(rule, pos)
+        if m is None:
+            break
+        data = m.groupdict()
+        if data["static"]:
+            yield None, None, data["static"]
+        variable = data["variable"]
+        converter = data["converter"] or "default"
+        if variable in used_names:
+            raise ValueError(f"variable name {variable!r} used twice.")
+        used_names.add(variable)
+        yield converter, data["args"] or None, variable
+        pos = m.end()
+    if pos < end:
+        remaining = rule[pos:]
+        if ">" in remaining or "<" in remaining:
+            raise ValueError(f"malformed url rule: {rule!r}")
+        yield None, None, remaining
+
+
+class RoutingException(Exception):
+    """Special exceptions that require the application to redirect, notifying
+    about missing urls, etc.
+
+    :internal:
+    """
+
+
+class RequestRedirect(HTTPException, RoutingException):
+    """Raise if the map requests a redirect. This is for example the case if
+    `strict_slashes` are activated and an url that requires a trailing slash.
+
+    The attribute `new_url` contains the absolute destination url.
+    """
+
+    code = 308
+
+    def __init__(self, new_url: str) -> None:
+        super().__init__(new_url)
+        self.new_url = new_url
+
+    def get_response(
+        self,
+        environ: t.Optional["WSGIEnvironment"] = None,
+        scope: t.Optional[dict] = None,
+    ) -> "Response":
+        return redirect(self.new_url, self.code)
+
+
+class RequestPath(RoutingException):
+    """Internal exception."""
+
+    __slots__ = ("path_info",)
+
+    def __init__(self, path_info: str) -> None:
+        super().__init__()
+        self.path_info = path_info
+
+
+class RequestAliasRedirect(RoutingException):  # noqa: B903
+    """This rule is an alias and wants to redirect to the canonical URL."""
+
+    def __init__(self, matched_values: t.Mapping[str, t.Any]) -> None:
+        super().__init__()
+        self.matched_values = matched_values
+
+
+class BuildError(RoutingException, LookupError):
+    """Raised if the build system cannot find a URL for an endpoint with the
+    values provided.
+    """
+
+    def __init__(
+        self,
+        endpoint: str,
+        values: t.Mapping[str, t.Any],
+        method: t.Optional[str],
+        adapter: t.Optional["MapAdapter"] = None,
+    ) -> None:
+        super().__init__(endpoint, values, method)
+        self.endpoint = endpoint
+        self.values = values
+        self.method = method
+        self.adapter = adapter
+
+    @cached_property
+    def suggested(self) -> t.Optional["Rule"]:
+        return self.closest_rule(self.adapter)
+
+    def closest_rule(self, adapter: t.Optional["MapAdapter"]) -> t.Optional["Rule"]:
+        def _score_rule(rule: "Rule") -> float:
+            return sum(
+                [
+                    0.98
+                    * difflib.SequenceMatcher(
+                        None, rule.endpoint, self.endpoint
+                    ).ratio(),
+                    0.01 * bool(set(self.values or ()).issubset(rule.arguments)),
+                    0.01 * bool(rule.methods and self.method in rule.methods),
+                ]
+            )
+
+        if adapter and adapter.map._rules:
+            return max(adapter.map._rules, key=_score_rule)
+
+        return None
+
+    def __str__(self) -> str:
+        message = [f"Could not build url for endpoint {self.endpoint!r}"]
+        if self.method:
+            message.append(f" ({self.method!r})")
+        if self.values:
+            message.append(f" with values {sorted(self.values)!r}")
+        message.append(".")
+        if self.suggested:
+            if self.endpoint == self.suggested.endpoint:
+                if (
+                    self.method
+                    and self.suggested.methods is not None
+                    and self.method not in self.suggested.methods
+                ):
+                    message.append(
+                        " Did you mean to use methods"
+                        f" {sorted(self.suggested.methods)!r}?"
+                    )
+                missing_values = self.suggested.arguments.union(
+                    set(self.suggested.defaults or ())
+                ) - set(self.values.keys())
+                if missing_values:
+                    message.append(
+                        f" Did you forget to specify values {sorted(missing_values)!r}?"
+                    )
+            else:
+                message.append(f" Did you mean {self.suggested.endpoint!r} instead?")
+        return "".join(message)
+
+
+class WebsocketMismatch(BadRequest):
+    """The only matched rule is either a WebSocket and the request is
+    HTTP, or the rule is HTTP and the request is a WebSocket.
+    """
+
+
+class ValidationError(ValueError):
+    """Validation error.  If a rule converter raises this exception the rule
+    does not match the current URL and the next URL is tried.
+    """
+
+
+class RuleFactory:
+    """As soon as you have more complex URL setups it's a good idea to use rule
+    factories to avoid repetitive tasks.  Some of them are builtin, others can
+    be added by subclassing `RuleFactory` and overriding `get_rules`.
+    """
+
+    def get_rules(self, map: "Map") -> t.Iterable["Rule"]:
+        """Subclasses of `RuleFactory` have to override this method and return
+        an iterable of rules."""
+        raise NotImplementedError()
+
+
+class Subdomain(RuleFactory):
+    """All URLs provided by this factory have the subdomain set to a
+    specific domain. For example if you want to use the subdomain for
+    the current language this can be a good setup::
+
+        url_map = Map([
+            Rule('/', endpoint='#select_language'),
+            Subdomain('', [
+                Rule('/', endpoint='index'),
+                Rule('/about', endpoint='about'),
+                Rule('/help', endpoint='help')
+            ])
+        ])
+
+    All the rules except for the ``'#select_language'`` endpoint will now
+    listen on a two letter long subdomain that holds the language code
+    for the current request.
+    """
+
+    def __init__(self, subdomain: str, rules: t.Iterable[RuleFactory]) -> None:
+        self.subdomain = subdomain
+        self.rules = rules
+
+    def get_rules(self, map: "Map") -> t.Iterator["Rule"]:
+        for rulefactory in self.rules:
+            for rule in rulefactory.get_rules(map):
+                rule = rule.empty()
+                rule.subdomain = self.subdomain
+                yield rule
+
+
+class Submount(RuleFactory):
+    """Like `Subdomain` but prefixes the URL rule with a given string::
+
+        url_map = Map([
+            Rule('/', endpoint='index'),
+            Submount('/blog', [
+                Rule('/', endpoint='blog/index'),
+                Rule('/entry/', endpoint='blog/show')
+            ])
+        ])
+
+    Now the rule ``'blog/show'`` matches ``/blog/entry/``.
+    """
+
+    def __init__(self, path: str, rules: t.Iterable[RuleFactory]) -> None:
+        self.path = path.rstrip("/")
+        self.rules = rules
+
+    def get_rules(self, map: "Map") -> t.Iterator["Rule"]:
+        for rulefactory in self.rules:
+            for rule in rulefactory.get_rules(map):
+                rule = rule.empty()
+                rule.rule = self.path + rule.rule
+                yield rule
+
+
+class EndpointPrefix(RuleFactory):
+    """Prefixes all endpoints (which must be strings for this factory) with
+    another string. This can be useful for sub applications::
+
+        url_map = Map([
+            Rule('/', endpoint='index'),
+            EndpointPrefix('blog/', [Submount('/blog', [
+                Rule('/', endpoint='index'),
+                Rule('/entry/', endpoint='show')
+            ])])
+        ])
+    """
+
+    def __init__(self, prefix: str, rules: t.Iterable[RuleFactory]) -> None:
+        self.prefix = prefix
+        self.rules = rules
+
+    def get_rules(self, map: "Map") -> t.Iterator["Rule"]:
+        for rulefactory in self.rules:
+            for rule in rulefactory.get_rules(map):
+                rule = rule.empty()
+                rule.endpoint = self.prefix + rule.endpoint
+                yield rule
+
+
+class RuleTemplate:
+    """Returns copies of the rules wrapped and expands string templates in
+    the endpoint, rule, defaults or subdomain sections.
+
+    Here a small example for such a rule template::
+
+        from werkzeug.routing import Map, Rule, RuleTemplate
+
+        resource = RuleTemplate([
+            Rule('/$name/', endpoint='$name.list'),
+            Rule('/$name/', endpoint='$name.show')
+        ])
+
+        url_map = Map([resource(name='user'), resource(name='page')])
+
+    When a rule template is called the keyword arguments are used to
+    replace the placeholders in all the string parameters.
+    """
+
+    def __init__(self, rules: t.Iterable["Rule"]) -> None:
+        self.rules = list(rules)
+
+    def __call__(self, *args: t.Any, **kwargs: t.Any) -> "RuleTemplateFactory":
+        return RuleTemplateFactory(self.rules, dict(*args, **kwargs))
+
+
+class RuleTemplateFactory(RuleFactory):
+    """A factory that fills in template variables into rules.  Used by
+    `RuleTemplate` internally.
+
+    :internal:
+    """
+
+    def __init__(
+        self, rules: t.Iterable[RuleFactory], context: t.Dict[str, t.Any]
+    ) -> None:
+        self.rules = rules
+        self.context = context
+
+    def get_rules(self, map: "Map") -> t.Iterator["Rule"]:
+        for rulefactory in self.rules:
+            for rule in rulefactory.get_rules(map):
+                new_defaults = subdomain = None
+                if rule.defaults:
+                    new_defaults = {}
+                    for key, value in rule.defaults.items():
+                        if isinstance(value, str):
+                            value = Template(value).substitute(self.context)
+                        new_defaults[key] = value
+                if rule.subdomain is not None:
+                    subdomain = Template(rule.subdomain).substitute(self.context)
+                new_endpoint = rule.endpoint
+                if isinstance(new_endpoint, str):
+                    new_endpoint = Template(new_endpoint).substitute(self.context)
+                yield Rule(
+                    Template(rule.rule).substitute(self.context),
+                    new_defaults,
+                    subdomain,
+                    rule.methods,
+                    rule.build_only,
+                    new_endpoint,
+                    rule.strict_slashes,
+                )
+
+
+def _prefix_names(src: str) -> ast.stmt:
+    """ast parse and prefix names with `.` to avoid collision with user vars"""
+    tree = ast.parse(src).body[0]
+    if isinstance(tree, ast.Expr):
+        tree = tree.value  # type: ignore
+    for node in ast.walk(tree):
+        if isinstance(node, ast.Name):
+            node.id = f".{node.id}"
+    return tree
+
+
+_CALL_CONVERTER_CODE_FMT = "self._converters[{elem!r}].to_url()"
+_IF_KWARGS_URL_ENCODE_CODE = """\
+if kwargs:
+    q = '?'
+    params = self._encode_query_vars(kwargs)
+else:
+    q = params = ''
+"""
+_IF_KWARGS_URL_ENCODE_AST = _prefix_names(_IF_KWARGS_URL_ENCODE_CODE)
+_URL_ENCODE_AST_NAMES = (_prefix_names("q"), _prefix_names("params"))
+
+
+class Rule(RuleFactory):
+    """A Rule represents one URL pattern.  There are some options for `Rule`
+    that change the way it behaves and are passed to the `Rule` constructor.
+    Note that besides the rule-string all arguments *must* be keyword arguments
+    in order to not break the application on Werkzeug upgrades.
+
+    `string`
+        Rule strings basically are just normal URL paths with placeholders in
+        the format ```` where the converter and the
+        arguments are optional.  If no converter is defined the `default`
+        converter is used which means `string` in the normal configuration.
+
+        URL rules that end with a slash are branch URLs, others are leaves.
+        If you have `strict_slashes` enabled (which is the default), all
+        branch URLs that are matched without a trailing slash will trigger a
+        redirect to the same URL with the missing slash appended.
+
+        The converters are defined on the `Map`.
+
+    `endpoint`
+        The endpoint for this rule. This can be anything. A reference to a
+        function, a string, a number etc.  The preferred way is using a string
+        because the endpoint is used for URL generation.
+
+    `defaults`
+        An optional dict with defaults for other rules with the same endpoint.
+        This is a bit tricky but useful if you want to have unique URLs::
+
+            url_map = Map([
+                Rule('/all/', defaults={'page': 1}, endpoint='all_entries'),
+                Rule('/all/page/', endpoint='all_entries')
+            ])
+
+        If a user now visits ``http://example.com/all/page/1`` he will be
+        redirected to ``http://example.com/all/``.  If `redirect_defaults` is
+        disabled on the `Map` instance this will only affect the URL
+        generation.
+
+    `subdomain`
+        The subdomain rule string for this rule. If not specified the rule
+        only matches for the `default_subdomain` of the map.  If the map is
+        not bound to a subdomain this feature is disabled.
+
+        Can be useful if you want to have user profiles on different subdomains
+        and all subdomains are forwarded to your application::
+
+            url_map = Map([
+                Rule('/', subdomain='', endpoint='user/homepage'),
+                Rule('/stats', subdomain='', endpoint='user/stats')
+            ])
+
+    `methods`
+        A sequence of http methods this rule applies to.  If not specified, all
+        methods are allowed. For example this can be useful if you want different
+        endpoints for `POST` and `GET`.  If methods are defined and the path
+        matches but the method matched against is not in this list or in the
+        list of another rule for that path the error raised is of the type
+        `MethodNotAllowed` rather than `NotFound`.  If `GET` is present in the
+        list of methods and `HEAD` is not, `HEAD` is added automatically.
+
+    `strict_slashes`
+        Override the `Map` setting for `strict_slashes` only for this rule. If
+        not specified the `Map` setting is used.
+
+    `merge_slashes`
+        Override :attr:`Map.merge_slashes` for this rule.
+
+    `build_only`
+        Set this to True and the rule will never match but will create a URL
+        that can be build. This is useful if you have resources on a subdomain
+        or folder that are not handled by the WSGI application (like static data)
+
+    `redirect_to`
+        If given this must be either a string or callable.  In case of a
+        callable it's called with the url adapter that triggered the match and
+        the values of the URL as keyword arguments and has to return the target
+        for the redirect, otherwise it has to be a string with placeholders in
+        rule syntax::
+
+            def foo_with_slug(adapter, id):
+                # ask the database for the slug for the old id.  this of
+                # course has nothing to do with werkzeug.
+                return f'foo/{Foo.get_slug_for_id(id)}'
+
+            url_map = Map([
+                Rule('/foo/', endpoint='foo'),
+                Rule('/some/old/url/', redirect_to='foo/'),
+                Rule('/other/old/url/', redirect_to=foo_with_slug)
+            ])
+
+        When the rule is matched the routing system will raise a
+        `RequestRedirect` exception with the target for the redirect.
+
+        Keep in mind that the URL will be joined against the URL root of the
+        script so don't use a leading slash on the target URL unless you
+        really mean root of that domain.
+
+    `alias`
+        If enabled this rule serves as an alias for another rule with the same
+        endpoint and arguments.
+
+    `host`
+        If provided and the URL map has host matching enabled this can be
+        used to provide a match rule for the whole host.  This also means
+        that the subdomain feature is disabled.
+
+    `websocket`
+        If ``True``, this rule is only matches for WebSocket (``ws://``,
+        ``wss://``) requests. By default, rules will only match for HTTP
+        requests.
+
+    .. versionadded:: 1.0
+        Added ``websocket``.
+
+    .. versionadded:: 1.0
+        Added ``merge_slashes``.
+
+    .. versionadded:: 0.7
+        Added ``alias`` and ``host``.
+
+    .. versionchanged:: 0.6.1
+       ``HEAD`` is added to ``methods`` if ``GET`` is present.
+    """
+
+    def __init__(
+        self,
+        string: str,
+        defaults: t.Optional[t.Mapping[str, t.Any]] = None,
+        subdomain: t.Optional[str] = None,
+        methods: t.Optional[t.Iterable[str]] = None,
+        build_only: bool = False,
+        endpoint: t.Optional[str] = None,
+        strict_slashes: t.Optional[bool] = None,
+        merge_slashes: t.Optional[bool] = None,
+        redirect_to: t.Optional[t.Union[str, t.Callable[..., str]]] = None,
+        alias: bool = False,
+        host: t.Optional[str] = None,
+        websocket: bool = False,
+    ) -> None:
+        if not string.startswith("/"):
+            raise ValueError("urls must start with a leading slash")
+        self.rule = string
+        self.is_leaf = not string.endswith("/")
+
+        self.map: "Map" = None  # type: ignore
+        self.strict_slashes = strict_slashes
+        self.merge_slashes = merge_slashes
+        self.subdomain = subdomain
+        self.host = host
+        self.defaults = defaults
+        self.build_only = build_only
+        self.alias = alias
+        self.websocket = websocket
+
+        if methods is not None:
+            if isinstance(methods, str):
+                raise TypeError("'methods' should be a list of strings.")
+
+            methods = {x.upper() for x in methods}
+
+            if "HEAD" not in methods and "GET" in methods:
+                methods.add("HEAD")
+
+            if websocket and methods - {"GET", "HEAD", "OPTIONS"}:
+                raise ValueError(
+                    "WebSocket rules can only use 'GET', 'HEAD', and 'OPTIONS' methods."
+                )
+
+        self.methods = methods
+        self.endpoint: str = endpoint  # type: ignore
+        self.redirect_to = redirect_to
+
+        if defaults:
+            self.arguments = set(map(str, defaults))
+        else:
+            self.arguments = set()
+
+        self._trace: t.List[t.Tuple[bool, str]] = []
+
+    def empty(self) -> "Rule":
+        """
+        Return an unbound copy of this rule.
+
+        This can be useful if want to reuse an already bound URL for another
+        map.  See ``get_empty_kwargs`` to override what keyword arguments are
+        provided to the new copy.
+        """
+        return type(self)(self.rule, **self.get_empty_kwargs())
+
+    def get_empty_kwargs(self) -> t.Mapping[str, t.Any]:
+        """
+        Provides kwargs for instantiating empty copy with empty()
+
+        Use this method to provide custom keyword arguments to the subclass of
+        ``Rule`` when calling ``some_rule.empty()``.  Helpful when the subclass
+        has custom keyword arguments that are needed at instantiation.
+
+        Must return a ``dict`` that will be provided as kwargs to the new
+        instance of ``Rule``, following the initial ``self.rule`` value which
+        is always provided as the first, required positional argument.
+        """
+        defaults = None
+        if self.defaults:
+            defaults = dict(self.defaults)
+        return dict(
+            defaults=defaults,
+            subdomain=self.subdomain,
+            methods=self.methods,
+            build_only=self.build_only,
+            endpoint=self.endpoint,
+            strict_slashes=self.strict_slashes,
+            redirect_to=self.redirect_to,
+            alias=self.alias,
+            host=self.host,
+        )
+
+    def get_rules(self, map: "Map") -> t.Iterator["Rule"]:
+        yield self
+
+    def refresh(self) -> None:
+        """Rebinds and refreshes the URL.  Call this if you modified the
+        rule in place.
+
+        :internal:
+        """
+        self.bind(self.map, rebind=True)
+
+    def bind(self, map: "Map", rebind: bool = False) -> None:
+        """Bind the url to a map and create a regular expression based on
+        the information from the rule itself and the defaults from the map.
+
+        :internal:
+        """
+        if self.map is not None and not rebind:
+            raise RuntimeError(f"url rule {self!r} already bound to map {self.map!r}")
+        self.map = map
+        if self.strict_slashes is None:
+            self.strict_slashes = map.strict_slashes
+        if self.merge_slashes is None:
+            self.merge_slashes = map.merge_slashes
+        if self.subdomain is None:
+            self.subdomain = map.default_subdomain
+        self.compile()
+
+    def get_converter(
+        self,
+        variable_name: str,
+        converter_name: str,
+        args: t.Tuple,
+        kwargs: t.Mapping[str, t.Any],
+    ) -> "BaseConverter":
+        """Looks up the converter for the given parameter.
+
+        .. versionadded:: 0.9
+        """
+        if converter_name not in self.map.converters:
+            raise LookupError(f"the converter {converter_name!r} does not exist")
+        return self.map.converters[converter_name](self.map, *args, **kwargs)
+
+    def _encode_query_vars(self, query_vars: t.Mapping[str, t.Any]) -> str:
+        return url_encode(
+            query_vars,
+            charset=self.map.charset,
+            sort=self.map.sort_parameters,
+            key=self.map.sort_key,
+        )
+
+    def compile(self) -> None:
+        """Compiles the regular expression and stores it."""
+        assert self.map is not None, "rule not bound"
+
+        if self.map.host_matching:
+            domain_rule = self.host or ""
+        else:
+            domain_rule = self.subdomain or ""
+
+        self._trace = []
+        self._converters: t.Dict[str, "BaseConverter"] = {}
+        self._static_weights: t.List[t.Tuple[int, int]] = []
+        self._argument_weights: t.List[int] = []
+        regex_parts = []
+
+        def _build_regex(rule: str) -> None:
+            index = 0
+            for converter, arguments, variable in parse_rule(rule):
+                if converter is None:
+                    for match in re.finditer(r"/+|[^/]+", variable):
+                        part = match.group(0)
+                        if part.startswith("/"):
+                            if self.merge_slashes:
+                                regex_parts.append(r"/+?")
+                                self._trace.append((False, "/"))
+                            else:
+                                regex_parts.append(part)
+                                self._trace.append((False, part))
+                            continue
+                        self._trace.append((False, part))
+                        regex_parts.append(re.escape(part))
+                        if part:
+                            self._static_weights.append((index, -len(part)))
+                else:
+                    if arguments:
+                        c_args, c_kwargs = parse_converter_args(arguments)
+                    else:
+                        c_args = ()
+                        c_kwargs = {}
+                    convobj = self.get_converter(variable, converter, c_args, c_kwargs)
+                    regex_parts.append(f"(?P<{variable}>{convobj.regex})")
+                    self._converters[variable] = convobj
+                    self._trace.append((True, variable))
+                    self._argument_weights.append(convobj.weight)
+                    self.arguments.add(str(variable))
+                index = index + 1
+
+        _build_regex(domain_rule)
+        regex_parts.append("\\|")
+        self._trace.append((False, "|"))
+        _build_regex(self.rule if self.is_leaf else self.rule.rstrip("/"))
+        if not self.is_leaf:
+            self._trace.append((False, "/"))
+
+        self._build: t.Callable[..., t.Tuple[str, str]]
+        self._build = self._compile_builder(False).__get__(self, None)  # type: ignore
+        self._build_unknown: t.Callable[..., t.Tuple[str, str]]
+        self._build_unknown = self._compile_builder(True).__get__(  # type: ignore
+            self, None
+        )
+
+        if self.build_only:
+            return
+
+        if not (self.is_leaf and self.strict_slashes):
+            reps = "*" if self.merge_slashes else "?"
+            tail = f"(?/{reps})"
+        else:
+            tail = ""
+
+        regex = f"^{''.join(regex_parts)}{tail}$"
+        self._regex = re.compile(regex)
+
+    def match(
+        self, path: str, method: t.Optional[str] = None
+    ) -> t.Optional[t.MutableMapping[str, t.Any]]:
+        """Check if the rule matches a given path. Path is a string in the
+        form ``"subdomain|/path"`` and is assembled by the map.  If
+        the map is doing host matching the subdomain part will be the host
+        instead.
+
+        If the rule matches a dict with the converted values is returned,
+        otherwise the return value is `None`.
+
+        :internal:
+        """
+        if not self.build_only:
+            require_redirect = False
+
+            m = self._regex.search(path)
+            if m is not None:
+                groups = m.groupdict()
+                # we have a folder like part of the url without a trailing
+                # slash and strict slashes enabled. raise an exception that
+                # tells the map to redirect to the same url but with a
+                # trailing slash
+                if (
+                    self.strict_slashes
+                    and not self.is_leaf
+                    and not groups.pop("__suffix__")
+                    and (
+                        method is None or self.methods is None or method in self.methods
+                    )
+                ):
+                    path += "/"
+                    require_redirect = True
+                # if we are not in strict slashes mode we have to remove
+                # a __suffix__
+                elif not self.strict_slashes:
+                    del groups["__suffix__"]
+
+                result = {}
+                for name, value in groups.items():
+                    try:
+                        value = self._converters[name].to_python(value)
+                    except ValidationError:
+                        return None
+                    result[str(name)] = value
+                if self.defaults:
+                    result.update(self.defaults)
+
+                if self.merge_slashes:
+                    new_path = "|".join(self.build(result, False))  # type: ignore
+                    if path.endswith("/") and not new_path.endswith("/"):
+                        new_path += "/"
+                    if new_path.count("/") < path.count("/"):
+                        # The URL will be encoded when MapAdapter.match
+                        # handles the RequestPath raised below. Decode
+                        # the URL here to avoid a double encoding.
+                        path = url_unquote(new_path)
+                        require_redirect = True
+
+                if require_redirect:
+                    path = path.split("|", 1)[1]
+                    raise RequestPath(path)
+
+                if self.alias and self.map.redirect_defaults:
+                    raise RequestAliasRedirect(result)
+
+                return result
+
+        return None
+
+    @staticmethod
+    def _get_func_code(code: CodeType, name: str) -> t.Callable[..., t.Tuple[str, str]]:
+        globs: t.Dict[str, t.Any] = {}
+        locs: t.Dict[str, t.Any] = {}
+        exec(code, globs, locs)
+        return locs[name]  # type: ignore
+
+    def _compile_builder(
+        self, append_unknown: bool = True
+    ) -> t.Callable[..., t.Tuple[str, str]]:
+        defaults = self.defaults or {}
+        dom_ops: t.List[t.Tuple[bool, str]] = []
+        url_ops: t.List[t.Tuple[bool, str]] = []
+
+        opl = dom_ops
+        for is_dynamic, data in self._trace:
+            if data == "|" and opl is dom_ops:
+                opl = url_ops
+                continue
+            # this seems like a silly case to ever come up but:
+            # if a default is given for a value that appears in the rule,
+            # resolve it to a constant ahead of time
+            if is_dynamic and data in defaults:
+                data = self._converters[data].to_url(defaults[data])
+                opl.append((False, data))
+            elif not is_dynamic:
+                opl.append(
+                    (False, url_quote(_to_bytes(data, self.map.charset), safe="/:|+"))
+                )
+            else:
+                opl.append((True, data))
+
+        def _convert(elem: str) -> ast.stmt:
+            ret = _prefix_names(_CALL_CONVERTER_CODE_FMT.format(elem=elem))
+            ret.args = [ast.Name(str(elem), ast.Load())]  # type: ignore  # str for py2
+            return ret
+
+        def _parts(ops: t.List[t.Tuple[bool, str]]) -> t.List[ast.AST]:
+            parts = [
+                _convert(elem) if is_dynamic else ast.Str(s=elem)
+                for is_dynamic, elem in ops
+            ]
+            parts = parts or [ast.Str("")]
+            # constant fold
+            ret = [parts[0]]
+            for p in parts[1:]:
+                if isinstance(p, ast.Str) and isinstance(ret[-1], ast.Str):
+                    ret[-1] = ast.Str(ret[-1].s + p.s)
+                else:
+                    ret.append(p)
+            return ret
+
+        dom_parts = _parts(dom_ops)
+        url_parts = _parts(url_ops)
+        if not append_unknown:
+            body = []
+        else:
+            body = [_IF_KWARGS_URL_ENCODE_AST]
+            url_parts.extend(_URL_ENCODE_AST_NAMES)
+
+        def _join(parts: t.List[ast.AST]) -> ast.AST:
+            if len(parts) == 1:  # shortcut
+                return parts[0]
+            return ast.JoinedStr(parts)
+
+        body.append(
+            ast.Return(ast.Tuple([_join(dom_parts), _join(url_parts)], ast.Load()))
+        )
+
+        pargs = [
+            elem
+            for is_dynamic, elem in dom_ops + url_ops
+            if is_dynamic and elem not in defaults
+        ]
+        kargs = [str(k) for k in defaults]
+
+        func_ast: ast.FunctionDef = _prefix_names("def _(): pass")  # type: ignore
+        func_ast.name = f""
+        func_ast.args.args.append(ast.arg(".self", None))
+        for arg in pargs + kargs:
+            func_ast.args.args.append(ast.arg(arg, None))
+        func_ast.args.kwarg = ast.arg(".kwargs", None)
+        for _ in kargs:
+            func_ast.args.defaults.append(ast.Str(""))
+        func_ast.body = body
+
+        # use `ast.parse` instead of `ast.Module` for better portability
+        # Python 3.8 changes the signature of `ast.Module`
+        module = ast.parse("")
+        module.body = [func_ast]
+
+        # mark everything as on line 1, offset 0
+        # less error-prone than `ast.fix_missing_locations`
+        # bad line numbers cause an assert to fail in debug builds
+        for node in ast.walk(module):
+            if "lineno" in node._attributes:
+                node.lineno = 1
+            if "col_offset" in node._attributes:
+                node.col_offset = 0
+
+        code = compile(module, "", "exec")
+        return self._get_func_code(code, func_ast.name)
+
+    def build(
+        self, values: t.Mapping[str, t.Any], append_unknown: bool = True
+    ) -> t.Optional[t.Tuple[str, str]]:
+        """Assembles the relative url for that rule and the subdomain.
+        If building doesn't work for some reasons `None` is returned.
+
+        :internal:
+        """
+        try:
+            if append_unknown:
+                return self._build_unknown(**values)
+            else:
+                return self._build(**values)
+        except ValidationError:
+            return None
+
+    def provides_defaults_for(self, rule: "Rule") -> bool:
+        """Check if this rule has defaults for a given rule.
+
+        :internal:
+        """
+        return bool(
+            not self.build_only
+            and self.defaults
+            and self.endpoint == rule.endpoint
+            and self != rule
+            and self.arguments == rule.arguments
+        )
+
+    def suitable_for(
+        self, values: t.Mapping[str, t.Any], method: t.Optional[str] = None
+    ) -> bool:
+        """Check if the dict of values has enough data for url generation.
+
+        :internal:
+        """
+        # if a method was given explicitly and that method is not supported
+        # by this rule, this rule is not suitable.
+        if (
+            method is not None
+            and self.methods is not None
+            and method not in self.methods
+        ):
+            return False
+
+        defaults = self.defaults or ()
+
+        # all arguments required must be either in the defaults dict or
+        # the value dictionary otherwise it's not suitable
+        for key in self.arguments:
+            if key not in defaults and key not in values:
+                return False
+
+        # in case defaults are given we ensure that either the value was
+        # skipped or the value is the same as the default value.
+        if defaults:
+            for key, value in defaults.items():
+                if key in values and value != values[key]:
+                    return False
+
+        return True
+
+    def match_compare_key(
+        self,
+    ) -> t.Tuple[bool, int, t.Iterable[t.Tuple[int, int]], int, t.Iterable[int]]:
+        """The match compare key for sorting.
+
+        Current implementation:
+
+        1.  rules without any arguments come first for performance
+            reasons only as we expect them to match faster and some
+            common ones usually don't have any arguments (index pages etc.)
+        2.  rules with more static parts come first so the second argument
+            is the negative length of the number of the static weights.
+        3.  we order by static weights, which is a combination of index
+            and length
+        4.  The more complex rules come first so the next argument is the
+            negative length of the number of argument weights.
+        5.  lastly we order by the actual argument weights.
+
+        :internal:
+        """
+        return (
+            bool(self.arguments),
+            -len(self._static_weights),
+            self._static_weights,
+            -len(self._argument_weights),
+            self._argument_weights,
+        )
+
+    def build_compare_key(self) -> t.Tuple[int, int, int]:
+        """The build compare key for sorting.
+
+        :internal:
+        """
+        return (1 if self.alias else 0, -len(self.arguments), -len(self.defaults or ()))
+
+    def __eq__(self, other: object) -> bool:
+        return isinstance(other, type(self)) and self._trace == other._trace
+
+    __hash__ = None  # type: ignore
+
+    def __str__(self) -> str:
+        return self.rule
+
+    def __repr__(self) -> str:
+        if self.map is None:
+            return f"<{type(self).__name__} (unbound)>"
+        parts = []
+        for is_dynamic, data in self._trace:
+            if is_dynamic:
+                parts.append(f"<{data}>")
+            else:
+                parts.append(data)
+        parts = "".join(parts).lstrip("|")
+        methods = f" ({', '.join(self.methods)})" if self.methods is not None else ""
+        return f"<{type(self).__name__} {parts!r}{methods} -> {self.endpoint}>"
+
+
+class BaseConverter:
+    """Base class for all converters."""
+
+    regex = "[^/]+"
+    weight = 100
+
+    def __init__(self, map: "Map", *args: t.Any, **kwargs: t.Any) -> None:
+        self.map = map
+
+    def to_python(self, value: str) -> t.Any:
+        return value
+
+    def to_url(self, value: t.Any) -> str:
+        if isinstance(value, (bytes, bytearray)):
+            return _fast_url_quote(value)
+        return _fast_url_quote(str(value).encode(self.map.charset))
+
+
+class UnicodeConverter(BaseConverter):
+    """This converter is the default converter and accepts any string but
+    only one path segment.  Thus the string can not include a slash.
+
+    This is the default validator.
+
+    Example::
+
+        Rule('/pages/'),
+        Rule('/')
+
+    :param map: the :class:`Map`.
+    :param minlength: the minimum length of the string.  Must be greater
+                      or equal 1.
+    :param maxlength: the maximum length of the string.
+    :param length: the exact length of the string.
+    """
+
+    def __init__(
+        self,
+        map: "Map",
+        minlength: int = 1,
+        maxlength: t.Optional[int] = None,
+        length: t.Optional[int] = None,
+    ) -> None:
+        super().__init__(map)
+        if length is not None:
+            length_regex = f"{{{int(length)}}}"
+        else:
+            if maxlength is None:
+                maxlength_value = ""
+            else:
+                maxlength_value = str(int(maxlength))
+            length_regex = f"{{{int(minlength)},{maxlength_value}}}"
+        self.regex = f"[^/]{length_regex}"
+
+
+class AnyConverter(BaseConverter):
+    """Matches one of the items provided.  Items can either be Python
+    identifiers or strings::
+
+        Rule('/')
+
+    :param map: the :class:`Map`.
+    :param items: this function accepts the possible items as positional
+                  arguments.
+    """
+
+    def __init__(self, map: "Map", *items: str) -> None:
+        super().__init__(map)
+        self.regex = f"(?:{'|'.join([re.escape(x) for x in items])})"
+
+
+class PathConverter(BaseConverter):
+    """Like the default :class:`UnicodeConverter`, but it also matches
+    slashes.  This is useful for wikis and similar applications::
+
+        Rule('/')
+        Rule('//edit')
+
+    :param map: the :class:`Map`.
+    """
+
+    regex = "[^/].*?"
+    weight = 200
+
+
+class NumberConverter(BaseConverter):
+    """Baseclass for `IntegerConverter` and `FloatConverter`.
+
+    :internal:
+    """
+
+    weight = 50
+    num_convert: t.Callable = int
+
+    def __init__(
+        self,
+        map: "Map",
+        fixed_digits: int = 0,
+        min: t.Optional[int] = None,
+        max: t.Optional[int] = None,
+        signed: bool = False,
+    ) -> None:
+        if signed:
+            self.regex = self.signed_regex
+        super().__init__(map)
+        self.fixed_digits = fixed_digits
+        self.min = min
+        self.max = max
+        self.signed = signed
+
+    def to_python(self, value: str) -> t.Any:
+        if self.fixed_digits and len(value) != self.fixed_digits:
+            raise ValidationError()
+        value = self.num_convert(value)
+        if (self.min is not None and value < self.min) or (
+            self.max is not None and value > self.max
+        ):
+            raise ValidationError()
+        return value
+
+    def to_url(self, value: t.Any) -> str:
+        value = str(self.num_convert(value))
+        if self.fixed_digits:
+            value = value.zfill(self.fixed_digits)
+        return value
+
+    @property
+    def signed_regex(self) -> str:
+        return f"-?{self.regex}"
+
+
+class IntegerConverter(NumberConverter):
+    """This converter only accepts integer values::
+
+        Rule("/page/")
+
+    By default it only accepts unsigned, positive values. The ``signed``
+    parameter will enable signed, negative values. ::
+
+        Rule("/page/")
+
+    :param map: The :class:`Map`.
+    :param fixed_digits: The number of fixed digits in the URL. If you
+        set this to ``4`` for example, the rule will only match if the
+        URL looks like ``/0001/``. The default is variable length.
+    :param min: The minimal value.
+    :param max: The maximal value.
+    :param signed: Allow signed (negative) values.
+
+    .. versionadded:: 0.15
+        The ``signed`` parameter.
+    """
+
+    regex = r"\d+"
+
+
+class FloatConverter(NumberConverter):
+    """This converter only accepts floating point values::
+
+        Rule("/probability/")
+
+    By default it only accepts unsigned, positive values. The ``signed``
+    parameter will enable signed, negative values. ::
+
+        Rule("/offset/")
+
+    :param map: The :class:`Map`.
+    :param min: The minimal value.
+    :param max: The maximal value.
+    :param signed: Allow signed (negative) values.
+
+    .. versionadded:: 0.15
+        The ``signed`` parameter.
+    """
+
+    regex = r"\d+\.\d+"
+    num_convert = float
+
+    def __init__(
+        self,
+        map: "Map",
+        min: t.Optional[float] = None,
+        max: t.Optional[float] = None,
+        signed: bool = False,
+    ) -> None:
+        super().__init__(map, min=min, max=max, signed=signed)  # type: ignore
+
+
+class UUIDConverter(BaseConverter):
+    """This converter only accepts UUID strings::
+
+        Rule('/object/')
+
+    .. versionadded:: 0.10
+
+    :param map: the :class:`Map`.
+    """
+
+    regex = (
+        r"[A-Fa-f0-9]{8}-[A-Fa-f0-9]{4}-"
+        r"[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{12}"
+    )
+
+    def to_python(self, value: str) -> uuid.UUID:
+        return uuid.UUID(value)
+
+    def to_url(self, value: uuid.UUID) -> str:
+        return str(value)
+
+
+#: the default converter mapping for the map.
+DEFAULT_CONVERTERS: t.Mapping[str, t.Type[BaseConverter]] = {
+    "default": UnicodeConverter,
+    "string": UnicodeConverter,
+    "any": AnyConverter,
+    "path": PathConverter,
+    "int": IntegerConverter,
+    "float": FloatConverter,
+    "uuid": UUIDConverter,
+}
+
+
+class Map:
+    """The map class stores all the URL rules and some configuration
+    parameters.  Some of the configuration values are only stored on the
+    `Map` instance since those affect all rules, others are just defaults
+    and can be overridden for each rule.  Note that you have to specify all
+    arguments besides the `rules` as keyword arguments!
+
+    :param rules: sequence of url rules for this map.
+    :param default_subdomain: The default subdomain for rules without a
+                              subdomain defined.
+    :param charset: charset of the url. defaults to ``"utf-8"``
+    :param strict_slashes: If a rule ends with a slash but the matched
+        URL does not, redirect to the URL with a trailing slash.
+    :param merge_slashes: Merge consecutive slashes when matching or
+        building URLs. Matches will redirect to the normalized URL.
+        Slashes in variable parts are not merged.
+    :param redirect_defaults: This will redirect to the default rule if it
+                              wasn't visited that way. This helps creating
+                              unique URLs.
+    :param converters: A dict of converters that adds additional converters
+                       to the list of converters. If you redefine one
+                       converter this will override the original one.
+    :param sort_parameters: If set to `True` the url parameters are sorted.
+                            See `url_encode` for more details.
+    :param sort_key: The sort key function for `url_encode`.
+    :param encoding_errors: the error method to use for decoding
+    :param host_matching: if set to `True` it enables the host matching
+                          feature and disables the subdomain one.  If
+                          enabled the `host` parameter to rules is used
+                          instead of the `subdomain` one.
+
+    .. versionchanged:: 1.0
+        If ``url_scheme`` is ``ws`` or ``wss``, only WebSocket rules
+        will match.
+
+    .. versionchanged:: 1.0
+        Added ``merge_slashes``.
+
+    .. versionchanged:: 0.7
+        Added ``encoding_errors`` and ``host_matching``.
+
+    .. versionchanged:: 0.5
+        Added ``sort_parameters`` and ``sort_key``.
+    """
+
+    #: A dict of default converters to be used.
+    default_converters = ImmutableDict(DEFAULT_CONVERTERS)
+
+    #: The type of lock to use when updating.
+    #:
+    #: .. versionadded:: 1.0
+    lock_class = Lock
+
+    def __init__(
+        self,
+        rules: t.Optional[t.Iterable[RuleFactory]] = None,
+        default_subdomain: str = "",
+        charset: str = "utf-8",
+        strict_slashes: bool = True,
+        merge_slashes: bool = True,
+        redirect_defaults: bool = True,
+        converters: t.Optional[t.Mapping[str, t.Type[BaseConverter]]] = None,
+        sort_parameters: bool = False,
+        sort_key: t.Optional[t.Callable[[t.Any], t.Any]] = None,
+        encoding_errors: str = "replace",
+        host_matching: bool = False,
+    ) -> None:
+        self._rules: t.List[Rule] = []
+        self._rules_by_endpoint: t.Dict[str, t.List[Rule]] = {}
+        self._remap = True
+        self._remap_lock = self.lock_class()
+
+        self.default_subdomain = default_subdomain
+        self.charset = charset
+        self.encoding_errors = encoding_errors
+        self.strict_slashes = strict_slashes
+        self.merge_slashes = merge_slashes
+        self.redirect_defaults = redirect_defaults
+        self.host_matching = host_matching
+
+        self.converters = self.default_converters.copy()
+        if converters:
+            self.converters.update(converters)
+
+        self.sort_parameters = sort_parameters
+        self.sort_key = sort_key
+
+        for rulefactory in rules or ():
+            self.add(rulefactory)
+
+    def is_endpoint_expecting(self, endpoint: str, *arguments: str) -> bool:
+        """Iterate over all rules and check if the endpoint expects
+        the arguments provided.  This is for example useful if you have
+        some URLs that expect a language code and others that do not and
+        you want to wrap the builder a bit so that the current language
+        code is automatically added if not provided but endpoints expect
+        it.
+
+        :param endpoint: the endpoint to check.
+        :param arguments: this function accepts one or more arguments
+                          as positional arguments.  Each one of them is
+                          checked.
+        """
+        self.update()
+        arguments = set(arguments)
+        for rule in self._rules_by_endpoint[endpoint]:
+            if arguments.issubset(rule.arguments):
+                return True
+        return False
+
+    def iter_rules(self, endpoint: t.Optional[str] = None) -> t.Iterator[Rule]:
+        """Iterate over all rules or the rules of an endpoint.
+
+        :param endpoint: if provided only the rules for that endpoint
+                         are returned.
+        :return: an iterator
+        """
+        self.update()
+        if endpoint is not None:
+            return iter(self._rules_by_endpoint[endpoint])
+        return iter(self._rules)
+
+    def add(self, rulefactory: RuleFactory) -> None:
+        """Add a new rule or factory to the map and bind it.  Requires that the
+        rule is not bound to another map.
+
+        :param rulefactory: a :class:`Rule` or :class:`RuleFactory`
+        """
+        for rule in rulefactory.get_rules(self):
+            rule.bind(self)
+            self._rules.append(rule)
+            self._rules_by_endpoint.setdefault(rule.endpoint, []).append(rule)
+        self._remap = True
+
+    def bind(
+        self,
+        server_name: str,
+        script_name: t.Optional[str] = None,
+        subdomain: t.Optional[str] = None,
+        url_scheme: str = "http",
+        default_method: str = "GET",
+        path_info: t.Optional[str] = None,
+        query_args: t.Optional[t.Union[t.Mapping[str, t.Any], str]] = None,
+    ) -> "MapAdapter":
+        """Return a new :class:`MapAdapter` with the details specified to the
+        call.  Note that `script_name` will default to ``'/'`` if not further
+        specified or `None`.  The `server_name` at least is a requirement
+        because the HTTP RFC requires absolute URLs for redirects and so all
+        redirect exceptions raised by Werkzeug will contain the full canonical
+        URL.
+
+        If no path_info is passed to :meth:`match` it will use the default path
+        info passed to bind.  While this doesn't really make sense for
+        manual bind calls, it's useful if you bind a map to a WSGI
+        environment which already contains the path info.
+
+        `subdomain` will default to the `default_subdomain` for this map if
+        no defined. If there is no `default_subdomain` you cannot use the
+        subdomain feature.
+
+        .. versionchanged:: 1.0
+            If ``url_scheme`` is ``ws`` or ``wss``, only WebSocket rules
+            will match.
+
+        .. versionchanged:: 0.15
+            ``path_info`` defaults to ``'/'`` if ``None``.
+
+        .. versionchanged:: 0.8
+            ``query_args`` can be a string.
+
+        .. versionchanged:: 0.7
+            Added ``query_args``.
+        """
+        server_name = server_name.lower()
+        if self.host_matching:
+            if subdomain is not None:
+                raise RuntimeError("host matching enabled and a subdomain was provided")
+        elif subdomain is None:
+            subdomain = self.default_subdomain
+        if script_name is None:
+            script_name = "/"
+        if path_info is None:
+            path_info = "/"
+
+        try:
+            server_name = _encode_idna(server_name)  # type: ignore
+        except UnicodeError as e:
+            raise BadHost() from e
+
+        return MapAdapter(
+            self,
+            server_name,
+            script_name,
+            subdomain,
+            url_scheme,
+            path_info,
+            default_method,
+            query_args,
+        )
+
+    def bind_to_environ(
+        self,
+        environ: "WSGIEnvironment",
+        server_name: t.Optional[str] = None,
+        subdomain: t.Optional[str] = None,
+    ) -> "MapAdapter":
+        """Like :meth:`bind` but you can pass it an WSGI environment and it
+        will fetch the information from that dictionary.  Note that because of
+        limitations in the protocol there is no way to get the current
+        subdomain and real `server_name` from the environment.  If you don't
+        provide it, Werkzeug will use `SERVER_NAME` and `SERVER_PORT` (or
+        `HTTP_HOST` if provided) as used `server_name` with disabled subdomain
+        feature.
+
+        If `subdomain` is `None` but an environment and a server name is
+        provided it will calculate the current subdomain automatically.
+        Example: `server_name` is ``'example.com'`` and the `SERVER_NAME`
+        in the wsgi `environ` is ``'staging.dev.example.com'`` the calculated
+        subdomain will be ``'staging.dev'``.
+
+        If the object passed as environ has an environ attribute, the value of
+        this attribute is used instead.  This allows you to pass request
+        objects.  Additionally `PATH_INFO` added as a default of the
+        :class:`MapAdapter` so that you don't have to pass the path info to
+        the match method.
+
+        .. versionchanged:: 1.0.0
+            If the passed server name specifies port 443, it will match
+            if the incoming scheme is ``https`` without a port.
+
+        .. versionchanged:: 1.0.0
+            A warning is shown when the passed server name does not
+            match the incoming WSGI server name.
+
+        .. versionchanged:: 0.8
+           This will no longer raise a ValueError when an unexpected server
+           name was passed.
+
+        .. versionchanged:: 0.5
+            previously this method accepted a bogus `calculate_subdomain`
+            parameter that did not have any effect.  It was removed because
+            of that.
+
+        :param environ: a WSGI environment.
+        :param server_name: an optional server name hint (see above).
+        :param subdomain: optionally the current subdomain (see above).
+        """
+        environ = _get_environ(environ)
+        wsgi_server_name = get_host(environ).lower()
+        scheme = environ["wsgi.url_scheme"]
+        upgrade = any(
+            v.strip() == "upgrade"
+            for v in environ.get("HTTP_CONNECTION", "").lower().split(",")
+        )
+
+        if upgrade and environ.get("HTTP_UPGRADE", "").lower() == "websocket":
+            scheme = "wss" if scheme == "https" else "ws"
+
+        if server_name is None:
+            server_name = wsgi_server_name
+        else:
+            server_name = server_name.lower()
+
+            # strip standard port to match get_host()
+            if scheme in {"http", "ws"} and server_name.endswith(":80"):
+                server_name = server_name[:-3]
+            elif scheme in {"https", "wss"} and server_name.endswith(":443"):
+                server_name = server_name[:-4]
+
+        if subdomain is None and not self.host_matching:
+            cur_server_name = wsgi_server_name.split(".")
+            real_server_name = server_name.split(".")
+            offset = -len(real_server_name)
+
+            if cur_server_name[offset:] != real_server_name:
+                # This can happen even with valid configs if the server was
+                # accessed directly by IP address under some situations.
+                # Instead of raising an exception like in Werkzeug 0.7 or
+                # earlier we go by an invalid subdomain which will result
+                # in a 404 error on matching.
+                warnings.warn(
+                    f"Current server name {wsgi_server_name!r} doesn't match configured"
+                    f" server name {server_name!r}",
+                    stacklevel=2,
+                )
+                subdomain = ""
+            else:
+                subdomain = ".".join(filter(None, cur_server_name[:offset]))
+
+        def _get_wsgi_string(name: str) -> t.Optional[str]:
+            val = environ.get(name)
+            if val is not None:
+                return _wsgi_decoding_dance(val, self.charset)
+            return None
+
+        script_name = _get_wsgi_string("SCRIPT_NAME")
+        path_info = _get_wsgi_string("PATH_INFO")
+        query_args = _get_wsgi_string("QUERY_STRING")
+        return Map.bind(
+            self,
+            server_name,
+            script_name,
+            subdomain,
+            scheme,
+            environ["REQUEST_METHOD"],
+            path_info,
+            query_args=query_args,
+        )
+
+    def update(self) -> None:
+        """Called before matching and building to keep the compiled rules
+        in the correct order after things changed.
+        """
+        if not self._remap:
+            return
+
+        with self._remap_lock:
+            if not self._remap:
+                return
+
+            self._rules.sort(key=lambda x: x.match_compare_key())
+            for rules in self._rules_by_endpoint.values():
+                rules.sort(key=lambda x: x.build_compare_key())
+            self._remap = False
+
+    def __repr__(self) -> str:
+        rules = self.iter_rules()
+        return f"{type(self).__name__}({pformat(list(rules))})"
+
+
+class MapAdapter:
+
+    """Returned by :meth:`Map.bind` or :meth:`Map.bind_to_environ` and does
+    the URL matching and building based on runtime information.
+    """
+
+    def __init__(
+        self,
+        map: Map,
+        server_name: str,
+        script_name: str,
+        subdomain: t.Optional[str],
+        url_scheme: str,
+        path_info: str,
+        default_method: str,
+        query_args: t.Optional[t.Union[t.Mapping[str, t.Any], str]] = None,
+    ):
+        self.map = map
+        self.server_name = _to_str(server_name)
+        script_name = _to_str(script_name)
+        if not script_name.endswith("/"):
+            script_name += "/"
+        self.script_name = script_name
+        self.subdomain = _to_str(subdomain)
+        self.url_scheme = _to_str(url_scheme)
+        self.path_info = _to_str(path_info)
+        self.default_method = _to_str(default_method)
+        self.query_args = query_args
+        self.websocket = self.url_scheme in {"ws", "wss"}
+
+    def dispatch(
+        self,
+        view_func: t.Callable[[str, t.Mapping[str, t.Any]], "WSGIApplication"],
+        path_info: t.Optional[str] = None,
+        method: t.Optional[str] = None,
+        catch_http_exceptions: bool = False,
+    ) -> "WSGIApplication":
+        """Does the complete dispatching process.  `view_func` is called with
+        the endpoint and a dict with the values for the view.  It should
+        look up the view function, call it, and return a response object
+        or WSGI application.  http exceptions are not caught by default
+        so that applications can display nicer error messages by just
+        catching them by hand.  If you want to stick with the default
+        error messages you can pass it ``catch_http_exceptions=True`` and
+        it will catch the http exceptions.
+
+        Here a small example for the dispatch usage::
+
+            from werkzeug.wrappers import Request, Response
+            from werkzeug.wsgi import responder
+            from werkzeug.routing import Map, Rule
+
+            def on_index(request):
+                return Response('Hello from the index')
+
+            url_map = Map([Rule('/', endpoint='index')])
+            views = {'index': on_index}
+
+            @responder
+            def application(environ, start_response):
+                request = Request(environ)
+                urls = url_map.bind_to_environ(environ)
+                return urls.dispatch(lambda e, v: views[e](request, **v),
+                                     catch_http_exceptions=True)
+
+        Keep in mind that this method might return exception objects, too, so
+        use :class:`Response.force_type` to get a response object.
+
+        :param view_func: a function that is called with the endpoint as
+                          first argument and the value dict as second.  Has
+                          to dispatch to the actual view function with this
+                          information.  (see above)
+        :param path_info: the path info to use for matching.  Overrides the
+                          path info specified on binding.
+        :param method: the HTTP method used for matching.  Overrides the
+                       method specified on binding.
+        :param catch_http_exceptions: set to `True` to catch any of the
+                                      werkzeug :class:`HTTPException`\\s.
+        """
+        try:
+            try:
+                endpoint, args = self.match(path_info, method)
+            except RequestRedirect as e:
+                return e
+            return view_func(endpoint, args)
+        except HTTPException as e:
+            if catch_http_exceptions:
+                return e
+            raise
+
+    @typing.overload
+    def match(  # type: ignore
+        self,
+        path_info: t.Optional[str] = None,
+        method: t.Optional[str] = None,
+        return_rule: "te.Literal[False]" = False,
+        query_args: t.Optional[t.Union[t.Mapping[str, t.Any], str]] = None,
+        websocket: t.Optional[bool] = None,
+    ) -> t.Tuple[str, t.Mapping[str, t.Any]]:
+        ...
+
+    @typing.overload
+    def match(
+        self,
+        path_info: t.Optional[str] = None,
+        method: t.Optional[str] = None,
+        return_rule: "te.Literal[True]" = True,
+        query_args: t.Optional[t.Union[t.Mapping[str, t.Any], str]] = None,
+        websocket: t.Optional[bool] = None,
+    ) -> t.Tuple[Rule, t.Mapping[str, t.Any]]:
+        ...
+
+    def match(
+        self,
+        path_info: t.Optional[str] = None,
+        method: t.Optional[str] = None,
+        return_rule: bool = False,
+        query_args: t.Optional[t.Union[t.Mapping[str, t.Any], str]] = None,
+        websocket: t.Optional[bool] = None,
+    ) -> t.Tuple[t.Union[str, Rule], t.Mapping[str, t.Any]]:
+        """The usage is simple: you just pass the match method the current
+        path info as well as the method (which defaults to `GET`).  The
+        following things can then happen:
+
+        - you receive a `NotFound` exception that indicates that no URL is
+          matching.  A `NotFound` exception is also a WSGI application you
+          can call to get a default page not found page (happens to be the
+          same object as `werkzeug.exceptions.NotFound`)
+
+        - you receive a `MethodNotAllowed` exception that indicates that there
+          is a match for this URL but not for the current request method.
+          This is useful for RESTful applications.
+
+        - you receive a `RequestRedirect` exception with a `new_url`
+          attribute.  This exception is used to notify you about a request
+          Werkzeug requests from your WSGI application.  This is for example the
+          case if you request ``/foo`` although the correct URL is ``/foo/``
+          You can use the `RequestRedirect` instance as response-like object
+          similar to all other subclasses of `HTTPException`.
+
+        - you receive a ``WebsocketMismatch`` exception if the only
+          match is a WebSocket rule but the bind is an HTTP request, or
+          if the match is an HTTP rule but the bind is a WebSocket
+          request.
+
+        - you get a tuple in the form ``(endpoint, arguments)`` if there is
+          a match (unless `return_rule` is True, in which case you get a tuple
+          in the form ``(rule, arguments)``)
+
+        If the path info is not passed to the match method the default path
+        info of the map is used (defaults to the root URL if not defined
+        explicitly).
+
+        All of the exceptions raised are subclasses of `HTTPException` so they
+        can be used as WSGI responses. They will all render generic error or
+        redirect pages.
+
+        Here is a small example for matching:
+
+        >>> m = Map([
+        ...     Rule('/', endpoint='index'),
+        ...     Rule('/downloads/', endpoint='downloads/index'),
+        ...     Rule('/downloads/', endpoint='downloads/show')
+        ... ])
+        >>> urls = m.bind("example.com", "/")
+        >>> urls.match("/", "GET")
+        ('index', {})
+        >>> urls.match("/downloads/42")
+        ('downloads/show', {'id': 42})
+
+        And here is what happens on redirect and missing URLs:
+
+        >>> urls.match("/downloads")
+        Traceback (most recent call last):
+          ...
+        RequestRedirect: http://example.com/downloads/
+        >>> urls.match("/missing")
+        Traceback (most recent call last):
+          ...
+        NotFound: 404 Not Found
+
+        :param path_info: the path info to use for matching.  Overrides the
+                          path info specified on binding.
+        :param method: the HTTP method used for matching.  Overrides the
+                       method specified on binding.
+        :param return_rule: return the rule that matched instead of just the
+                            endpoint (defaults to `False`).
+        :param query_args: optional query arguments that are used for
+                           automatic redirects as string or dictionary.  It's
+                           currently not possible to use the query arguments
+                           for URL matching.
+        :param websocket: Match WebSocket instead of HTTP requests. A
+            websocket request has a ``ws`` or ``wss``
+            :attr:`url_scheme`. This overrides that detection.
+
+        .. versionadded:: 1.0
+            Added ``websocket``.
+
+        .. versionchanged:: 0.8
+            ``query_args`` can be a string.
+
+        .. versionadded:: 0.7
+            Added ``query_args``.
+
+        .. versionadded:: 0.6
+            Added ``return_rule``.
+        """
+        self.map.update()
+        if path_info is None:
+            path_info = self.path_info
+        else:
+            path_info = _to_str(path_info, self.map.charset)
+        if query_args is None:
+            query_args = self.query_args or {}
+        method = (method or self.default_method).upper()
+
+        if websocket is None:
+            websocket = self.websocket
+
+        require_redirect = False
+
+        domain_part = self.server_name if self.map.host_matching else self.subdomain
+        path_part = f"/{path_info.lstrip('/')}" if path_info else ""
+        path = f"{domain_part}|{path_part}"
+
+        have_match_for = set()
+        websocket_mismatch = False
+
+        for rule in self.map._rules:
+            try:
+                rv = rule.match(path, method)
+            except RequestPath as e:
+                raise RequestRedirect(
+                    self.make_redirect_url(
+                        url_quote(e.path_info, self.map.charset, safe="/:|+"),
+                        query_args,
+                    )
+                ) from None
+            except RequestAliasRedirect as e:
+                raise RequestRedirect(
+                    self.make_alias_redirect_url(
+                        path, rule.endpoint, e.matched_values, method, query_args
+                    )
+                ) from None
+            if rv is None:
+                continue
+            if rule.methods is not None and method not in rule.methods:
+                have_match_for.update(rule.methods)
+                continue
+
+            if rule.websocket != websocket:
+                websocket_mismatch = True
+                continue
+
+            if self.map.redirect_defaults:
+                redirect_url = self.get_default_redirect(rule, method, rv, query_args)
+                if redirect_url is not None:
+                    raise RequestRedirect(redirect_url)
+
+            if rule.redirect_to is not None:
+                if isinstance(rule.redirect_to, str):
+
+                    def _handle_match(match: t.Match[str]) -> str:
+                        value = rv[match.group(1)]  # type: ignore
+                        return rule._converters[match.group(1)].to_url(value)
+
+                    redirect_url = _simple_rule_re.sub(_handle_match, rule.redirect_to)
+                else:
+                    redirect_url = rule.redirect_to(self, **rv)
+
+                if self.subdomain:
+                    netloc = f"{self.subdomain}.{self.server_name}"
+                else:
+                    netloc = self.server_name
+
+                raise RequestRedirect(
+                    url_join(
+                        f"{self.url_scheme or 'http'}://{netloc}{self.script_name}",
+                        redirect_url,
+                    )
+                )
+
+            if require_redirect:
+                raise RequestRedirect(
+                    self.make_redirect_url(
+                        url_quote(path_info, self.map.charset, safe="/:|+"), query_args
+                    )
+                )
+
+            if return_rule:
+                return rule, rv
+            else:
+                return rule.endpoint, rv
+
+        if have_match_for:
+            raise MethodNotAllowed(valid_methods=list(have_match_for))
+
+        if websocket_mismatch:
+            raise WebsocketMismatch()
+
+        raise NotFound()
+
+    def test(
+        self, path_info: t.Optional[str] = None, method: t.Optional[str] = None
+    ) -> bool:
+        """Test if a rule would match.  Works like `match` but returns `True`
+        if the URL matches, or `False` if it does not exist.
+
+        :param path_info: the path info to use for matching.  Overrides the
+                          path info specified on binding.
+        :param method: the HTTP method used for matching.  Overrides the
+                       method specified on binding.
+        """
+        try:
+            self.match(path_info, method)
+        except RequestRedirect:
+            pass
+        except HTTPException:
+            return False
+        return True
+
+    def allowed_methods(self, path_info: t.Optional[str] = None) -> t.Iterable[str]:
+        """Returns the valid methods that match for a given path.
+
+        .. versionadded:: 0.7
+        """
+        try:
+            self.match(path_info, method="--")
+        except MethodNotAllowed as e:
+            return e.valid_methods  # type: ignore
+        except HTTPException:
+            pass
+        return []
+
+    def get_host(self, domain_part: t.Optional[str]) -> str:
+        """Figures out the full host name for the given domain part.  The
+        domain part is a subdomain in case host matching is disabled or
+        a full host name.
+        """
+        if self.map.host_matching:
+            if domain_part is None:
+                return self.server_name
+            return _to_str(domain_part, "ascii")
+        subdomain = domain_part
+        if subdomain is None:
+            subdomain = self.subdomain
+        else:
+            subdomain = _to_str(subdomain, "ascii")
+
+        if subdomain:
+            return f"{subdomain}.{self.server_name}"
+        else:
+            return self.server_name
+
+    def get_default_redirect(
+        self,
+        rule: Rule,
+        method: str,
+        values: t.MutableMapping[str, t.Any],
+        query_args: t.Union[t.Mapping[str, t.Any], str],
+    ) -> t.Optional[str]:
+        """A helper that returns the URL to redirect to if it finds one.
+        This is used for default redirecting only.
+
+        :internal:
+        """
+        assert self.map.redirect_defaults
+        for r in self.map._rules_by_endpoint[rule.endpoint]:
+            # every rule that comes after this one, including ourself
+            # has a lower priority for the defaults.  We order the ones
+            # with the highest priority up for building.
+            if r is rule:
+                break
+            if r.provides_defaults_for(rule) and r.suitable_for(values, method):
+                values.update(r.defaults)  # type: ignore
+                domain_part, path = r.build(values)  # type: ignore
+                return self.make_redirect_url(path, query_args, domain_part=domain_part)
+        return None
+
+    def encode_query_args(self, query_args: t.Union[t.Mapping[str, t.Any], str]) -> str:
+        if not isinstance(query_args, str):
+            return url_encode(query_args, self.map.charset)
+        return query_args
+
+    def make_redirect_url(
+        self,
+        path_info: str,
+        query_args: t.Optional[t.Union[t.Mapping[str, t.Any], str]] = None,
+        domain_part: t.Optional[str] = None,
+    ) -> str:
+        """Creates a redirect URL.
+
+        :internal:
+        """
+        if query_args:
+            suffix = f"?{self.encode_query_args(query_args)}"
+        else:
+            suffix = ""
+
+        scheme = self.url_scheme or "http"
+        host = self.get_host(domain_part)
+        path = posixpath.join(self.script_name.strip("/"), path_info.lstrip("/"))
+        return f"{scheme}://{host}/{path}{suffix}"
+
+    def make_alias_redirect_url(
+        self,
+        path: str,
+        endpoint: str,
+        values: t.Mapping[str, t.Any],
+        method: str,
+        query_args: t.Union[t.Mapping[str, t.Any], str],
+    ) -> str:
+        """Internally called to make an alias redirect URL."""
+        url = self.build(
+            endpoint, values, method, append_unknown=False, force_external=True
+        )
+        if query_args:
+            url += f"?{self.encode_query_args(query_args)}"
+        assert url != path, "detected invalid alias setting. No canonical URL found"
+        return url
+
+    def _partial_build(
+        self,
+        endpoint: str,
+        values: t.Mapping[str, t.Any],
+        method: t.Optional[str],
+        append_unknown: bool,
+    ) -> t.Optional[t.Tuple[str, str, bool]]:
+        """Helper for :meth:`build`.  Returns subdomain and path for the
+        rule that accepts this endpoint, values and method.
+
+        :internal:
+        """
+        # in case the method is none, try with the default method first
+        if method is None:
+            rv = self._partial_build(
+                endpoint, values, self.default_method, append_unknown
+            )
+            if rv is not None:
+                return rv
+
+        # Default method did not match or a specific method is passed.
+        # Check all for first match with matching host. If no matching
+        # host is found, go with first result.
+        first_match = None
+
+        for rule in self.map._rules_by_endpoint.get(endpoint, ()):
+            if rule.suitable_for(values, method):
+                build_rv = rule.build(values, append_unknown)
+
+                if build_rv is not None:
+                    rv = (build_rv[0], build_rv[1], rule.websocket)
+                    if self.map.host_matching:
+                        if rv[0] == self.server_name:
+                            return rv
+                        elif first_match is None:
+                            first_match = rv
+                    else:
+                        return rv
+
+        return first_match
+
+    def build(
+        self,
+        endpoint: str,
+        values: t.Optional[t.Mapping[str, t.Any]] = None,
+        method: t.Optional[str] = None,
+        force_external: bool = False,
+        append_unknown: bool = True,
+        url_scheme: t.Optional[str] = None,
+    ) -> str:
+        """Building URLs works pretty much the other way round.  Instead of
+        `match` you call `build` and pass it the endpoint and a dict of
+        arguments for the placeholders.
+
+        The `build` function also accepts an argument called `force_external`
+        which, if you set it to `True` will force external URLs. Per default
+        external URLs (include the server name) will only be used if the
+        target URL is on a different subdomain.
+
+        >>> m = Map([
+        ...     Rule('/', endpoint='index'),
+        ...     Rule('/downloads/', endpoint='downloads/index'),
+        ...     Rule('/downloads/', endpoint='downloads/show')
+        ... ])
+        >>> urls = m.bind("example.com", "/")
+        >>> urls.build("index", {})
+        '/'
+        >>> urls.build("downloads/show", {'id': 42})
+        '/downloads/42'
+        >>> urls.build("downloads/show", {'id': 42}, force_external=True)
+        'http://example.com/downloads/42'
+
+        Because URLs cannot contain non ASCII data you will always get
+        bytes back.  Non ASCII characters are urlencoded with the
+        charset defined on the map instance.
+
+        Additional values are converted to strings and appended to the URL as
+        URL querystring parameters:
+
+        >>> urls.build("index", {'q': 'My Searchstring'})
+        '/?q=My+Searchstring'
+
+        When processing those additional values, lists are furthermore
+        interpreted as multiple values (as per
+        :py:class:`werkzeug.datastructures.MultiDict`):
+
+        >>> urls.build("index", {'q': ['a', 'b', 'c']})
+        '/?q=a&q=b&q=c'
+
+        Passing a ``MultiDict`` will also add multiple values:
+
+        >>> urls.build("index", MultiDict((('p', 'z'), ('q', 'a'), ('q', 'b'))))
+        '/?p=z&q=a&q=b'
+
+        If a rule does not exist when building a `BuildError` exception is
+        raised.
+
+        The build method accepts an argument called `method` which allows you
+        to specify the method you want to have an URL built for if you have
+        different methods for the same endpoint specified.
+
+        :param endpoint: the endpoint of the URL to build.
+        :param values: the values for the URL to build.  Unhandled values are
+                       appended to the URL as query parameters.
+        :param method: the HTTP method for the rule if there are different
+                       URLs for different methods on the same endpoint.
+        :param force_external: enforce full canonical external URLs. If the URL
+                               scheme is not provided, this will generate
+                               a protocol-relative URL.
+        :param append_unknown: unknown parameters are appended to the generated
+                               URL as query string argument.  Disable this
+                               if you want the builder to ignore those.
+        :param url_scheme: Scheme to use in place of the bound
+            :attr:`url_scheme`.
+
+        .. versionchanged:: 2.0
+            Added the ``url_scheme`` parameter.
+
+        .. versionadded:: 0.6
+           Added the ``append_unknown`` parameter.
+        """
+        self.map.update()
+
+        if values:
+            temp_values: t.Dict[str, t.Union[t.List[t.Any], t.Any]] = {}
+            always_list = isinstance(values, MultiDict)
+            key: str
+            value: t.Optional[t.Union[t.List[t.Any], t.Any]]
+
+            # For MultiDict, dict.items(values) is like values.lists()
+            # without the call or list coercion overhead.
+            for key, value in dict.items(values):  # type: ignore
+                if value is None:
+                    continue
+
+                if always_list or isinstance(value, (list, tuple)):
+                    value = [v for v in value if v is not None]
+
+                    if not value:
+                        continue
+
+                    if len(value) == 1:
+                        value = value[0]
+
+                temp_values[key] = value
+
+            values = temp_values
+        else:
+            values = {}
+
+        rv = self._partial_build(endpoint, values, method, append_unknown)
+        if rv is None:
+            raise BuildError(endpoint, values, method, self)
+
+        domain_part, path, websocket = rv
+        host = self.get_host(domain_part)
+
+        if url_scheme is None:
+            url_scheme = self.url_scheme
+
+        # Always build WebSocket routes with the scheme (browsers
+        # require full URLs). If bound to a WebSocket, ensure that HTTP
+        # routes are built with an HTTP scheme.
+        secure = url_scheme in {"https", "wss"}
+
+        if websocket:
+            force_external = True
+            url_scheme = "wss" if secure else "ws"
+        elif url_scheme:
+            url_scheme = "https" if secure else "http"
+
+        # shortcut this.
+        if not force_external and (
+            (self.map.host_matching and host == self.server_name)
+            or (not self.map.host_matching and domain_part == self.subdomain)
+        ):
+            return f"{self.script_name.rstrip('/')}/{path.lstrip('/')}"
+
+        scheme = f"{url_scheme}:" if url_scheme else ""
+        return f"{scheme}//{host}{self.script_name[:-1]}/{path.lstrip('/')}"
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/sansio/__init__.py b/.venv/lib/python3.6/site-packages/werkzeug/sansio/__init__.py
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diff --git a/.venv/lib/python3.6/site-packages/werkzeug/sansio/multipart.py b/.venv/lib/python3.6/site-packages/werkzeug/sansio/multipart.py
new file mode 100644
index 0000000..bb8ab34
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/sansio/multipart.py
@@ -0,0 +1,260 @@
+import re
+from dataclasses import dataclass
+from enum import auto
+from enum import Enum
+from typing import cast
+from typing import List
+from typing import Optional
+from typing import Tuple
+
+from .._internal import _to_bytes
+from .._internal import _to_str
+from ..datastructures import Headers
+from ..exceptions import RequestEntityTooLarge
+from ..http import parse_options_header
+
+
+class Event:
+    pass
+
+
+@dataclass(frozen=True)
+class Preamble(Event):
+    data: bytes
+
+
+@dataclass(frozen=True)
+class Field(Event):
+    name: str
+    headers: Headers
+
+
+@dataclass(frozen=True)
+class File(Event):
+    name: str
+    filename: str
+    headers: Headers
+
+
+@dataclass(frozen=True)
+class Data(Event):
+    data: bytes
+    more_data: bool
+
+
+@dataclass(frozen=True)
+class Epilogue(Event):
+    data: bytes
+
+
+class NeedData(Event):
+    pass
+
+
+NEED_DATA = NeedData()
+
+
+class State(Enum):
+    PREAMBLE = auto()
+    PART = auto()
+    DATA = auto()
+    EPILOGUE = auto()
+    COMPLETE = auto()
+
+
+# Multipart line breaks MUST be CRLF (\r\n) by RFC-7578, except that
+# many implementations break this and either use CR or LF alone.
+LINE_BREAK = b"(?:\r\n|\n|\r)"
+BLANK_LINE_RE = re.compile(b"(?:\r\n\r\n|\r\r|\n\n)", re.MULTILINE)
+LINE_BREAK_RE = re.compile(LINE_BREAK, re.MULTILINE)
+# Header values can be continued via a space or tab after the linebreak, as
+# per RFC2231
+HEADER_CONTINUATION_RE = re.compile(b"%s[ \t]" % LINE_BREAK, re.MULTILINE)
+
+
+class MultipartDecoder:
+    """Decodes a multipart message as bytes into Python events.
+
+    The part data is returned as available to allow the caller to save
+    the data from memory to disk, if desired.
+    """
+
+    def __init__(
+        self,
+        boundary: bytes,
+        max_form_memory_size: Optional[int] = None,
+    ) -> None:
+        self.buffer = bytearray()
+        self.complete = False
+        self.max_form_memory_size = max_form_memory_size
+        self.state = State.PREAMBLE
+        self.boundary = boundary
+
+        # Note in the below \h i.e. horizontal whitespace is used
+        # as [^\S\n\r] as \h isn't supported in python.
+
+        # The preamble must end with a boundary where the boundary is
+        # prefixed by a line break, RFC2046. Except that many
+        # implementations including Werkzeug's tests omit the line
+        # break prefix. In addition the first boundary could be the
+        # epilogue boundary (for empty form-data) hence the matching
+        # group to understand if it is an epilogue boundary.
+        self.preamble_re = re.compile(
+            br"%s?--%s(--[^\S\n\r]*%s?|[^\S\n\r]*%s)"
+            % (LINE_BREAK, re.escape(boundary), LINE_BREAK, LINE_BREAK),
+            re.MULTILINE,
+        )
+        # A boundary must include a line break prefix and suffix, and
+        # may include trailing whitespace. In addition the boundary
+        # could be the epilogue boundary hence the matching group to
+        # understand if it is an epilogue boundary.
+        self.boundary_re = re.compile(
+            br"%s--%s(--[^\S\n\r]*%s?|[^\S\n\r]*%s)"
+            % (LINE_BREAK, re.escape(boundary), LINE_BREAK, LINE_BREAK),
+            re.MULTILINE,
+        )
+
+    def last_newline(self) -> int:
+        try:
+            last_nl = self.buffer.rindex(b"\n")
+        except ValueError:
+            last_nl = len(self.buffer)
+        try:
+            last_cr = self.buffer.rindex(b"\r")
+        except ValueError:
+            last_cr = len(self.buffer)
+
+        return min(last_nl, last_cr)
+
+    def receive_data(self, data: Optional[bytes]) -> None:
+        if data is None:
+            self.complete = True
+        elif (
+            self.max_form_memory_size is not None
+            and len(self.buffer) + len(data) > self.max_form_memory_size
+        ):
+            raise RequestEntityTooLarge()
+        else:
+            self.buffer.extend(data)
+
+    def next_event(self) -> Event:
+        event: Event = NEED_DATA
+
+        if self.state == State.PREAMBLE:
+            match = self.preamble_re.search(self.buffer)
+            if match is not None:
+                if match.group(1).startswith(b"--"):
+                    self.state = State.EPILOGUE
+                else:
+                    self.state = State.PART
+                data = bytes(self.buffer[: match.start()])
+                del self.buffer[: match.end()]
+                event = Preamble(data=data)
+
+        elif self.state == State.PART:
+            match = BLANK_LINE_RE.search(self.buffer)
+            if match is not None:
+                headers = self._parse_headers(self.buffer[: match.start()])
+                del self.buffer[: match.end()]
+
+                if "content-disposition" not in headers:
+                    raise ValueError("Missing Content-Disposition header")
+
+                disposition, extra = parse_options_header(
+                    headers["content-disposition"]
+                )
+                name = cast(str, extra.get("name"))
+                filename = extra.get("filename")
+                if filename is not None:
+                    event = File(
+                        filename=filename,
+                        headers=headers,
+                        name=name,
+                    )
+                else:
+                    event = Field(
+                        headers=headers,
+                        name=name,
+                    )
+                self.state = State.DATA
+
+        elif self.state == State.DATA:
+            if self.buffer.find(b"--" + self.boundary) == -1:
+                # No complete boundary in the buffer, but there may be
+                # a partial boundary at the end. As the boundary
+                # starts with either a nl or cr find the earliest and
+                # return up to that as data.
+                data_length = del_index = self.last_newline()
+                more_data = True
+            else:
+                match = self.boundary_re.search(self.buffer)
+                if match is not None:
+                    if match.group(1).startswith(b"--"):
+                        self.state = State.EPILOGUE
+                    else:
+                        self.state = State.PART
+                    data_length = match.start()
+                    del_index = match.end()
+                else:
+                    data_length = del_index = self.last_newline()
+                more_data = match is None
+
+            data = bytes(self.buffer[:data_length])
+            del self.buffer[:del_index]
+            if data or not more_data:
+                event = Data(data=data, more_data=more_data)
+
+        elif self.state == State.EPILOGUE and self.complete:
+            event = Epilogue(data=bytes(self.buffer))
+            del self.buffer[:]
+            self.state = State.COMPLETE
+
+        if self.complete and isinstance(event, NeedData):
+            raise ValueError(f"Invalid form-data cannot parse beyond {self.state}")
+
+        return event
+
+    def _parse_headers(self, data: bytes) -> Headers:
+        headers: List[Tuple[str, str]] = []
+        # Merge the continued headers into one line
+        data = HEADER_CONTINUATION_RE.sub(b" ", data)
+        # Now there is one header per line
+        for line in data.splitlines():
+            if line.strip() != b"":
+                name, value = _to_str(line).strip().split(":", 1)
+                headers.append((name.strip(), value.strip()))
+        return Headers(headers)
+
+
+class MultipartEncoder:
+    def __init__(self, boundary: bytes) -> None:
+        self.boundary = boundary
+        self.state = State.PREAMBLE
+
+    def send_event(self, event: Event) -> bytes:
+        if isinstance(event, Preamble) and self.state == State.PREAMBLE:
+            self.state = State.PART
+            return event.data
+        elif isinstance(event, (Field, File)) and self.state in {
+            State.PREAMBLE,
+            State.PART,
+            State.DATA,
+        }:
+            self.state = State.DATA
+            data = b"\r\n--" + self.boundary + b"\r\n"
+            data += b'Content-Disposition: form-data; name="%s"' % _to_bytes(event.name)
+            if isinstance(event, File):
+                data += b'; filename="%s"' % _to_bytes(event.filename)
+            data += b"\r\n"
+            for name, value in cast(Field, event).headers:
+                if name.lower() != "content-disposition":
+                    data += _to_bytes(f"{name}: {value}\r\n")
+            data += b"\r\n"
+            return data
+        elif isinstance(event, Data) and self.state == State.DATA:
+            return event.data
+        elif isinstance(event, Epilogue):
+            self.state = State.COMPLETE
+            return b"\r\n--" + self.boundary + b"--\r\n" + event.data
+        else:
+            raise ValueError(f"Cannot generate {event} in state: {self.state}")
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/sansio/request.py b/.venv/lib/python3.6/site-packages/werkzeug/sansio/request.py
new file mode 100644
index 0000000..2c21a21
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/sansio/request.py
@@ -0,0 +1,548 @@
+import typing as t
+from datetime import datetime
+
+from .._internal import _to_str
+from ..datastructures import Accept
+from ..datastructures import Authorization
+from ..datastructures import CharsetAccept
+from ..datastructures import ETags
+from ..datastructures import Headers
+from ..datastructures import HeaderSet
+from ..datastructures import IfRange
+from ..datastructures import ImmutableList
+from ..datastructures import ImmutableMultiDict
+from ..datastructures import LanguageAccept
+from ..datastructures import MIMEAccept
+from ..datastructures import MultiDict
+from ..datastructures import Range
+from ..datastructures import RequestCacheControl
+from ..http import parse_accept_header
+from ..http import parse_authorization_header
+from ..http import parse_cache_control_header
+from ..http import parse_cookie
+from ..http import parse_date
+from ..http import parse_etags
+from ..http import parse_if_range_header
+from ..http import parse_list_header
+from ..http import parse_options_header
+from ..http import parse_range_header
+from ..http import parse_set_header
+from ..urls import url_decode
+from ..user_agent import UserAgent
+from ..useragents import _UserAgent as _DeprecatedUserAgent
+from ..utils import cached_property
+from ..utils import header_property
+from .utils import get_current_url
+from .utils import get_host
+
+
+class Request:
+    """Represents the non-IO parts of a HTTP request, including the
+    method, URL info, and headers.
+
+    This class is not meant for general use. It should only be used when
+    implementing WSGI, ASGI, or another HTTP application spec. Werkzeug
+    provides a WSGI implementation at :cls:`werkzeug.wrappers.Request`.
+
+    :param method: The method the request was made with, such as
+        ``GET``.
+    :param scheme: The URL scheme of the protocol the request used, such
+        as ``https`` or ``wss``.
+    :param server: The address of the server. ``(host, port)``,
+        ``(path, None)`` for unix sockets, or ``None`` if not known.
+    :param root_path: The prefix that the application is mounted under.
+        This is prepended to generated URLs, but is not part of route
+        matching.
+    :param path: The path part of the URL after ``root_path``.
+    :param query_string: The part of the URL after the "?".
+    :param headers: The headers received with the request.
+    :param remote_addr: The address of the client sending the request.
+
+    .. versionadded:: 2.0
+    """
+
+    #: The charset used to decode most data in the request.
+    charset = "utf-8"
+
+    #: the error handling procedure for errors, defaults to 'replace'
+    encoding_errors = "replace"
+
+    #: the class to use for `args` and `form`.  The default is an
+    #: :class:`~werkzeug.datastructures.ImmutableMultiDict` which supports
+    #: multiple values per key.  alternatively it makes sense to use an
+    #: :class:`~werkzeug.datastructures.ImmutableOrderedMultiDict` which
+    #: preserves order or a :class:`~werkzeug.datastructures.ImmutableDict`
+    #: which is the fastest but only remembers the last key.  It is also
+    #: possible to use mutable structures, but this is not recommended.
+    #:
+    #: .. versionadded:: 0.6
+    parameter_storage_class: t.Type[MultiDict] = ImmutableMultiDict
+
+    #: The type to be used for dict values from the incoming WSGI
+    #: environment. (For example for :attr:`cookies`.) By default an
+    #: :class:`~werkzeug.datastructures.ImmutableMultiDict` is used.
+    #:
+    #: .. versionchanged:: 1.0.0
+    #:     Changed to ``ImmutableMultiDict`` to support multiple values.
+    #:
+    #: .. versionadded:: 0.6
+    dict_storage_class: t.Type[MultiDict] = ImmutableMultiDict
+
+    #: the type to be used for list values from the incoming WSGI environment.
+    #: By default an :class:`~werkzeug.datastructures.ImmutableList` is used
+    #: (for example for :attr:`access_list`).
+    #:
+    #: .. versionadded:: 0.6
+    list_storage_class: t.Type[t.List] = ImmutableList
+
+    user_agent_class = _DeprecatedUserAgent
+    """The class used and returned by the :attr:`user_agent` property to
+    parse the header. Defaults to
+    :class:`~werkzeug.user_agent.UserAgent`, which does no parsing. An
+    extension can provide a subclass that uses a parser to provide other
+    data.
+
+    .. versionadded:: 2.0
+    """
+
+    #: Valid host names when handling requests. By default all hosts are
+    #: trusted, which means that whatever the client says the host is
+    #: will be accepted.
+    #:
+    #: Because ``Host`` and ``X-Forwarded-Host`` headers can be set to
+    #: any value by a malicious client, it is recommended to either set
+    #: this property or implement similar validation in the proxy (if
+    #: the application is being run behind one).
+    #:
+    #: .. versionadded:: 0.9
+    trusted_hosts: t.Optional[t.List[str]] = None
+
+    def __init__(
+        self,
+        method: str,
+        scheme: str,
+        server: t.Optional[t.Tuple[str, t.Optional[int]]],
+        root_path: str,
+        path: str,
+        query_string: bytes,
+        headers: Headers,
+        remote_addr: t.Optional[str],
+    ) -> None:
+        #: The method the request was made with, such as ``GET``.
+        self.method = method.upper()
+        #: The URL scheme of the protocol the request used, such as
+        #: ``https`` or ``wss``.
+        self.scheme = scheme
+        #: The address of the server. ``(host, port)``, ``(path, None)``
+        #: for unix sockets, or ``None`` if not known.
+        self.server = server
+        #: The prefix that the application is mounted under, without a
+        #: trailing slash. :attr:`path` comes after this.
+        self.root_path = root_path.rstrip("/")
+        #: The path part of the URL after :attr:`root_path`. This is the
+        #: path used for routing within the application.
+        self.path = "/" + path.lstrip("/")
+        #: The part of the URL after the "?". This is the raw value, use
+        #: :attr:`args` for the parsed values.
+        self.query_string = query_string
+        #: The headers received with the request.
+        self.headers = headers
+        #: The address of the client sending the request.
+        self.remote_addr = remote_addr
+
+    def __repr__(self) -> str:
+        try:
+            url = self.url
+        except Exception as e:
+            url = f"(invalid URL: {e})"
+
+        return f"<{type(self).__name__} {url!r} [{self.method}]>"
+
+    @property
+    def url_charset(self) -> str:
+        """The charset that is assumed for URLs. Defaults to the value
+        of :attr:`charset`.
+
+        .. versionadded:: 0.6
+        """
+        return self.charset
+
+    @cached_property
+    def args(self) -> "MultiDict[str, str]":
+        """The parsed URL parameters (the part in the URL after the question
+        mark).
+
+        By default an
+        :class:`~werkzeug.datastructures.ImmutableMultiDict`
+        is returned from this function.  This can be changed by setting
+        :attr:`parameter_storage_class` to a different type.  This might
+        be necessary if the order of the form data is important.
+        """
+        return url_decode(
+            self.query_string,
+            self.url_charset,
+            errors=self.encoding_errors,
+            cls=self.parameter_storage_class,
+        )
+
+    @cached_property
+    def access_route(self) -> t.List[str]:
+        """If a forwarded header exists this is a list of all ip addresses
+        from the client ip to the last proxy server.
+        """
+        if "X-Forwarded-For" in self.headers:
+            return self.list_storage_class(
+                parse_list_header(self.headers["X-Forwarded-For"])
+            )
+        elif self.remote_addr is not None:
+            return self.list_storage_class([self.remote_addr])
+        return self.list_storage_class()
+
+    @cached_property
+    def full_path(self) -> str:
+        """Requested path, including the query string."""
+        return f"{self.path}?{_to_str(self.query_string, self.url_charset)}"
+
+    @property
+    def is_secure(self) -> bool:
+        """``True`` if the request was made with a secure protocol
+        (HTTPS or WSS).
+        """
+        return self.scheme in {"https", "wss"}
+
+    @cached_property
+    def url(self) -> str:
+        """The full request URL with the scheme, host, root path, path,
+        and query string."""
+        return get_current_url(
+            self.scheme, self.host, self.root_path, self.path, self.query_string
+        )
+
+    @cached_property
+    def base_url(self) -> str:
+        """Like :attr:`url` but without the query string."""
+        return get_current_url(self.scheme, self.host, self.root_path, self.path)
+
+    @cached_property
+    def root_url(self) -> str:
+        """The request URL scheme, host, and root path. This is the root
+        that the application is accessed from.
+        """
+        return get_current_url(self.scheme, self.host, self.root_path)
+
+    @cached_property
+    def host_url(self) -> str:
+        """The request URL scheme and host only."""
+        return get_current_url(self.scheme, self.host)
+
+    @cached_property
+    def host(self) -> str:
+        """The host name the request was made to, including the port if
+        it's non-standard. Validated with :attr:`trusted_hosts`.
+        """
+        return get_host(
+            self.scheme, self.headers.get("host"), self.server, self.trusted_hosts
+        )
+
+    @cached_property
+    def cookies(self) -> "ImmutableMultiDict[str, str]":
+        """A :class:`dict` with the contents of all cookies transmitted with
+        the request."""
+        wsgi_combined_cookie = ";".join(self.headers.getlist("Cookie"))
+        return parse_cookie(  # type: ignore
+            wsgi_combined_cookie,
+            self.charset,
+            self.encoding_errors,
+            cls=self.dict_storage_class,
+        )
+
+    # Common Descriptors
+
+    content_type = header_property[str](
+        "Content-Type",
+        doc="""The Content-Type entity-header field indicates the media
+        type of the entity-body sent to the recipient or, in the case of
+        the HEAD method, the media type that would have been sent had
+        the request been a GET.""",
+        read_only=True,
+    )
+
+    @cached_property
+    def content_length(self) -> t.Optional[int]:
+        """The Content-Length entity-header field indicates the size of the
+        entity-body in bytes or, in the case of the HEAD method, the size of
+        the entity-body that would have been sent had the request been a
+        GET.
+        """
+        if self.headers.get("Transfer-Encoding", "") == "chunked":
+            return None
+
+        content_length = self.headers.get("Content-Length")
+        if content_length is not None:
+            try:
+                return max(0, int(content_length))
+            except (ValueError, TypeError):
+                pass
+
+        return None
+
+    content_encoding = header_property[str](
+        "Content-Encoding",
+        doc="""The Content-Encoding entity-header field is used as a
+        modifier to the media-type. When present, its value indicates
+        what additional content codings have been applied to the
+        entity-body, and thus what decoding mechanisms must be applied
+        in order to obtain the media-type referenced by the Content-Type
+        header field.
+
+        .. versionadded:: 0.9""",
+        read_only=True,
+    )
+    content_md5 = header_property[str](
+        "Content-MD5",
+        doc="""The Content-MD5 entity-header field, as defined in
+        RFC 1864, is an MD5 digest of the entity-body for the purpose of
+        providing an end-to-end message integrity check (MIC) of the
+        entity-body. (Note: a MIC is good for detecting accidental
+        modification of the entity-body in transit, but is not proof
+        against malicious attacks.)
+
+        .. versionadded:: 0.9""",
+        read_only=True,
+    )
+    referrer = header_property[str](
+        "Referer",
+        doc="""The Referer[sic] request-header field allows the client
+        to specify, for the server's benefit, the address (URI) of the
+        resource from which the Request-URI was obtained (the
+        "referrer", although the header field is misspelled).""",
+        read_only=True,
+    )
+    date = header_property(
+        "Date",
+        None,
+        parse_date,
+        doc="""The Date general-header field represents the date and
+        time at which the message was originated, having the same
+        semantics as orig-date in RFC 822.
+
+        .. versionchanged:: 2.0
+            The datetime object is timezone-aware.
+        """,
+        read_only=True,
+    )
+    max_forwards = header_property(
+        "Max-Forwards",
+        None,
+        int,
+        doc="""The Max-Forwards request-header field provides a
+        mechanism with the TRACE and OPTIONS methods to limit the number
+        of proxies or gateways that can forward the request to the next
+        inbound server.""",
+        read_only=True,
+    )
+
+    def _parse_content_type(self) -> None:
+        if not hasattr(self, "_parsed_content_type"):
+            self._parsed_content_type = parse_options_header(
+                self.headers.get("Content-Type", "")
+            )
+
+    @property
+    def mimetype(self) -> str:
+        """Like :attr:`content_type`, but without parameters (eg, without
+        charset, type etc.) and always lowercase.  For example if the content
+        type is ``text/HTML; charset=utf-8`` the mimetype would be
+        ``'text/html'``.
+        """
+        self._parse_content_type()
+        return self._parsed_content_type[0].lower()
+
+    @property
+    def mimetype_params(self) -> t.Dict[str, str]:
+        """The mimetype parameters as dict.  For example if the content
+        type is ``text/html; charset=utf-8`` the params would be
+        ``{'charset': 'utf-8'}``.
+        """
+        self._parse_content_type()
+        return self._parsed_content_type[1]
+
+    @cached_property
+    def pragma(self) -> HeaderSet:
+        """The Pragma general-header field is used to include
+        implementation-specific directives that might apply to any recipient
+        along the request/response chain.  All pragma directives specify
+        optional behavior from the viewpoint of the protocol; however, some
+        systems MAY require that behavior be consistent with the directives.
+        """
+        return parse_set_header(self.headers.get("Pragma", ""))
+
+    # Accept
+
+    @cached_property
+    def accept_mimetypes(self) -> MIMEAccept:
+        """List of mimetypes this client supports as
+        :class:`~werkzeug.datastructures.MIMEAccept` object.
+        """
+        return parse_accept_header(self.headers.get("Accept"), MIMEAccept)
+
+    @cached_property
+    def accept_charsets(self) -> CharsetAccept:
+        """List of charsets this client supports as
+        :class:`~werkzeug.datastructures.CharsetAccept` object.
+        """
+        return parse_accept_header(self.headers.get("Accept-Charset"), CharsetAccept)
+
+    @cached_property
+    def accept_encodings(self) -> Accept:
+        """List of encodings this client accepts.  Encodings in a HTTP term
+        are compression encodings such as gzip.  For charsets have a look at
+        :attr:`accept_charset`.
+        """
+        return parse_accept_header(self.headers.get("Accept-Encoding"))
+
+    @cached_property
+    def accept_languages(self) -> LanguageAccept:
+        """List of languages this client accepts as
+        :class:`~werkzeug.datastructures.LanguageAccept` object.
+
+        .. versionchanged 0.5
+           In previous versions this was a regular
+           :class:`~werkzeug.datastructures.Accept` object.
+        """
+        return parse_accept_header(self.headers.get("Accept-Language"), LanguageAccept)
+
+    # ETag
+
+    @cached_property
+    def cache_control(self) -> RequestCacheControl:
+        """A :class:`~werkzeug.datastructures.RequestCacheControl` object
+        for the incoming cache control headers.
+        """
+        cache_control = self.headers.get("Cache-Control")
+        return parse_cache_control_header(cache_control, None, RequestCacheControl)
+
+    @cached_property
+    def if_match(self) -> ETags:
+        """An object containing all the etags in the `If-Match` header.
+
+        :rtype: :class:`~werkzeug.datastructures.ETags`
+        """
+        return parse_etags(self.headers.get("If-Match"))
+
+    @cached_property
+    def if_none_match(self) -> ETags:
+        """An object containing all the etags in the `If-None-Match` header.
+
+        :rtype: :class:`~werkzeug.datastructures.ETags`
+        """
+        return parse_etags(self.headers.get("If-None-Match"))
+
+    @cached_property
+    def if_modified_since(self) -> t.Optional[datetime]:
+        """The parsed `If-Modified-Since` header as a datetime object.
+
+        .. versionchanged:: 2.0
+            The datetime object is timezone-aware.
+        """
+        return parse_date(self.headers.get("If-Modified-Since"))
+
+    @cached_property
+    def if_unmodified_since(self) -> t.Optional[datetime]:
+        """The parsed `If-Unmodified-Since` header as a datetime object.
+
+        .. versionchanged:: 2.0
+            The datetime object is timezone-aware.
+        """
+        return parse_date(self.headers.get("If-Unmodified-Since"))
+
+    @cached_property
+    def if_range(self) -> IfRange:
+        """The parsed ``If-Range`` header.
+
+        .. versionchanged:: 2.0
+            ``IfRange.date`` is timezone-aware.
+
+        .. versionadded:: 0.7
+        """
+        return parse_if_range_header(self.headers.get("If-Range"))
+
+    @cached_property
+    def range(self) -> t.Optional[Range]:
+        """The parsed `Range` header.
+
+        .. versionadded:: 0.7
+
+        :rtype: :class:`~werkzeug.datastructures.Range`
+        """
+        return parse_range_header(self.headers.get("Range"))
+
+    # User Agent
+
+    @cached_property
+    def user_agent(self) -> UserAgent:
+        """The user agent. Use ``user_agent.string`` to get the header
+        value. Set :attr:`user_agent_class` to a subclass of
+        :class:`~werkzeug.user_agent.UserAgent` to provide parsing for
+        the other properties or other extended data.
+
+        .. versionchanged:: 2.0
+            The built in parser is deprecated and will be removed in
+            Werkzeug 2.1. A ``UserAgent`` subclass must be set to parse
+            data from the string.
+        """
+        return self.user_agent_class(self.headers.get("User-Agent", ""))
+
+    # Authorization
+
+    @cached_property
+    def authorization(self) -> t.Optional[Authorization]:
+        """The `Authorization` object in parsed form."""
+        return parse_authorization_header(self.headers.get("Authorization"))
+
+    # CORS
+
+    origin = header_property[str](
+        "Origin",
+        doc=(
+            "The host that the request originated from. Set"
+            " :attr:`~CORSResponseMixin.access_control_allow_origin` on"
+            " the response to indicate which origins are allowed."
+        ),
+        read_only=True,
+    )
+
+    access_control_request_headers = header_property(
+        "Access-Control-Request-Headers",
+        load_func=parse_set_header,
+        doc=(
+            "Sent with a preflight request to indicate which headers"
+            " will be sent with the cross origin request. Set"
+            " :attr:`~CORSResponseMixin.access_control_allow_headers`"
+            " on the response to indicate which headers are allowed."
+        ),
+        read_only=True,
+    )
+
+    access_control_request_method = header_property[str](
+        "Access-Control-Request-Method",
+        doc=(
+            "Sent with a preflight request to indicate which method"
+            " will be used for the cross origin request. Set"
+            " :attr:`~CORSResponseMixin.access_control_allow_methods`"
+            " on the response to indicate which methods are allowed."
+        ),
+        read_only=True,
+    )
+
+    @property
+    def is_json(self) -> bool:
+        """Check if the mimetype indicates JSON data, either
+        :mimetype:`application/json` or :mimetype:`application/*+json`.
+        """
+        mt = self.mimetype
+        return (
+            mt == "application/json"
+            or mt.startswith("application/")
+            and mt.endswith("+json")
+        )
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/sansio/response.py b/.venv/lib/python3.6/site-packages/werkzeug/sansio/response.py
new file mode 100644
index 0000000..82817e8
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/sansio/response.py
@@ -0,0 +1,704 @@
+import typing as t
+from datetime import datetime
+from datetime import timedelta
+from datetime import timezone
+from http import HTTPStatus
+
+from .._internal import _to_str
+from ..datastructures import Headers
+from ..datastructures import HeaderSet
+from ..http import dump_cookie
+from ..http import HTTP_STATUS_CODES
+from ..utils import get_content_type
+from werkzeug.datastructures import CallbackDict
+from werkzeug.datastructures import ContentRange
+from werkzeug.datastructures import ContentSecurityPolicy
+from werkzeug.datastructures import ResponseCacheControl
+from werkzeug.datastructures import WWWAuthenticate
+from werkzeug.http import COEP
+from werkzeug.http import COOP
+from werkzeug.http import dump_age
+from werkzeug.http import dump_header
+from werkzeug.http import dump_options_header
+from werkzeug.http import http_date
+from werkzeug.http import parse_age
+from werkzeug.http import parse_cache_control_header
+from werkzeug.http import parse_content_range_header
+from werkzeug.http import parse_csp_header
+from werkzeug.http import parse_date
+from werkzeug.http import parse_options_header
+from werkzeug.http import parse_set_header
+from werkzeug.http import parse_www_authenticate_header
+from werkzeug.http import quote_etag
+from werkzeug.http import unquote_etag
+from werkzeug.utils import header_property
+
+
+def _set_property(name: str, doc: t.Optional[str] = None) -> property:
+    def fget(self: "Response") -> HeaderSet:
+        def on_update(header_set: HeaderSet) -> None:
+            if not header_set and name in self.headers:
+                del self.headers[name]
+            elif header_set:
+                self.headers[name] = header_set.to_header()
+
+        return parse_set_header(self.headers.get(name), on_update)
+
+    def fset(
+        self: "Response",
+        value: t.Optional[
+            t.Union[str, t.Dict[str, t.Union[str, int]], t.Iterable[str]]
+        ],
+    ) -> None:
+        if not value:
+            del self.headers[name]
+        elif isinstance(value, str):
+            self.headers[name] = value
+        else:
+            self.headers[name] = dump_header(value)
+
+    return property(fget, fset, doc=doc)
+
+
+class Response:
+    """Represents the non-IO parts of an HTTP response, specifically the
+    status and headers but not the body.
+
+    This class is not meant for general use. It should only be used when
+    implementing WSGI, ASGI, or another HTTP application spec. Werkzeug
+    provides a WSGI implementation at :cls:`werkzeug.wrappers.Response`.
+
+    :param status: The status code for the response. Either an int, in
+        which case the default status message is added, or a string in
+        the form ``{code} {message}``, like ``404 Not Found``. Defaults
+        to 200.
+    :param headers: A :class:`~werkzeug.datastructures.Headers` object,
+        or a list of ``(key, value)`` tuples that will be converted to a
+        ``Headers`` object.
+    :param mimetype: The mime type (content type without charset or
+        other parameters) of the response. If the value starts with
+        ``text/`` (or matches some other special cases), the charset
+        will be added to create the ``content_type``.
+    :param content_type: The full content type of the response.
+        Overrides building the value from ``mimetype``.
+
+    .. versionadded:: 2.0
+    """
+
+    #: the charset of the response.
+    charset = "utf-8"
+
+    #: the default status if none is provided.
+    default_status = 200
+
+    #: the default mimetype if none is provided.
+    default_mimetype = "text/plain"
+
+    #: Warn if a cookie header exceeds this size. The default, 4093, should be
+    #: safely `supported by most browsers `_. A cookie larger than
+    #: this size will still be sent, but it may be ignored or handled
+    #: incorrectly by some browsers. Set to 0 to disable this check.
+    #:
+    #: .. versionadded:: 0.13
+    #:
+    #: .. _`cookie`: http://browsercookielimits.squawky.net/
+    max_cookie_size = 4093
+
+    # A :class:`Headers` object representing the response headers.
+    headers: Headers
+
+    def __init__(
+        self,
+        status: t.Optional[t.Union[int, str, HTTPStatus]] = None,
+        headers: t.Optional[
+            t.Union[
+                t.Mapping[str, t.Union[str, int, t.Iterable[t.Union[str, int]]]],
+                t.Iterable[t.Tuple[str, t.Union[str, int]]],
+            ]
+        ] = None,
+        mimetype: t.Optional[str] = None,
+        content_type: t.Optional[str] = None,
+    ) -> None:
+        if isinstance(headers, Headers):
+            self.headers = headers
+        elif not headers:
+            self.headers = Headers()
+        else:
+            self.headers = Headers(headers)
+
+        if content_type is None:
+            if mimetype is None and "content-type" not in self.headers:
+                mimetype = self.default_mimetype
+            if mimetype is not None:
+                mimetype = get_content_type(mimetype, self.charset)
+            content_type = mimetype
+        if content_type is not None:
+            self.headers["Content-Type"] = content_type
+        if status is None:
+            status = self.default_status
+        self.status = status  # type: ignore
+
+    def __repr__(self) -> str:
+        return f"<{type(self).__name__} [{self.status}]>"
+
+    @property
+    def status_code(self) -> int:
+        """The HTTP status code as a number."""
+        return self._status_code
+
+    @status_code.setter
+    def status_code(self, code: int) -> None:
+        self.status = code  # type: ignore
+
+    @property
+    def status(self) -> str:
+        """The HTTP status code as a string."""
+        return self._status
+
+    @status.setter
+    def status(self, value: t.Union[str, int, HTTPStatus]) -> None:
+        if not isinstance(value, (str, bytes, int, HTTPStatus)):
+            raise TypeError("Invalid status argument")
+
+        self._status, self._status_code = self._clean_status(value)
+
+    def _clean_status(self, value: t.Union[str, int, HTTPStatus]) -> t.Tuple[str, int]:
+        if isinstance(value, HTTPStatus):
+            value = int(value)
+        status = _to_str(value, self.charset)
+        split_status = status.split(None, 1)
+
+        if len(split_status) == 0:
+            raise ValueError("Empty status argument")
+
+        if len(split_status) > 1:
+            if split_status[0].isdigit():
+                # code and message
+                return status, int(split_status[0])
+
+            # multi-word message
+            return f"0 {status}", 0
+
+        if split_status[0].isdigit():
+            # code only
+            status_code = int(split_status[0])
+
+            try:
+                status = f"{status_code} {HTTP_STATUS_CODES[status_code].upper()}"
+            except KeyError:
+                status = f"{status_code} UNKNOWN"
+
+            return status, status_code
+
+        # one-word message
+        return f"0 {status}", 0
+
+    def set_cookie(
+        self,
+        key: str,
+        value: str = "",
+        max_age: t.Optional[t.Union[timedelta, int]] = None,
+        expires: t.Optional[t.Union[str, datetime, int, float]] = None,
+        path: t.Optional[str] = "/",
+        domain: t.Optional[str] = None,
+        secure: bool = False,
+        httponly: bool = False,
+        samesite: t.Optional[str] = None,
+    ) -> None:
+        """Sets a cookie.
+
+        A warning is raised if the size of the cookie header exceeds
+        :attr:`max_cookie_size`, but the header will still be set.
+
+        :param key: the key (name) of the cookie to be set.
+        :param value: the value of the cookie.
+        :param max_age: should be a number of seconds, or `None` (default) if
+                        the cookie should last only as long as the client's
+                        browser session.
+        :param expires: should be a `datetime` object or UNIX timestamp.
+        :param path: limits the cookie to a given path, per default it will
+                     span the whole domain.
+        :param domain: if you want to set a cross-domain cookie.  For example,
+                       ``domain=".example.com"`` will set a cookie that is
+                       readable by the domain ``www.example.com``,
+                       ``foo.example.com`` etc.  Otherwise, a cookie will only
+                       be readable by the domain that set it.
+        :param secure: If ``True``, the cookie will only be available
+            via HTTPS.
+        :param httponly: Disallow JavaScript access to the cookie.
+        :param samesite: Limit the scope of the cookie to only be
+            attached to requests that are "same-site".
+        """
+        self.headers.add(
+            "Set-Cookie",
+            dump_cookie(
+                key,
+                value=value,
+                max_age=max_age,
+                expires=expires,
+                path=path,
+                domain=domain,
+                secure=secure,
+                httponly=httponly,
+                charset=self.charset,
+                max_size=self.max_cookie_size,
+                samesite=samesite,
+            ),
+        )
+
+    def delete_cookie(
+        self,
+        key: str,
+        path: str = "/",
+        domain: t.Optional[str] = None,
+        secure: bool = False,
+        httponly: bool = False,
+        samesite: t.Optional[str] = None,
+    ) -> None:
+        """Delete a cookie.  Fails silently if key doesn't exist.
+
+        :param key: the key (name) of the cookie to be deleted.
+        :param path: if the cookie that should be deleted was limited to a
+                     path, the path has to be defined here.
+        :param domain: if the cookie that should be deleted was limited to a
+                       domain, that domain has to be defined here.
+        :param secure: If ``True``, the cookie will only be available
+            via HTTPS.
+        :param httponly: Disallow JavaScript access to the cookie.
+        :param samesite: Limit the scope of the cookie to only be
+            attached to requests that are "same-site".
+        """
+        self.set_cookie(
+            key,
+            expires=0,
+            max_age=0,
+            path=path,
+            domain=domain,
+            secure=secure,
+            httponly=httponly,
+            samesite=samesite,
+        )
+
+    @property
+    def is_json(self) -> bool:
+        """Check if the mimetype indicates JSON data, either
+        :mimetype:`application/json` or :mimetype:`application/*+json`.
+        """
+        mt = self.mimetype
+        return mt is not None and (
+            mt == "application/json"
+            or mt.startswith("application/")
+            and mt.endswith("+json")
+        )
+
+    # Common Descriptors
+
+    @property
+    def mimetype(self) -> t.Optional[str]:
+        """The mimetype (content type without charset etc.)"""
+        ct = self.headers.get("content-type")
+
+        if ct:
+            return ct.split(";")[0].strip()
+        else:
+            return None
+
+    @mimetype.setter
+    def mimetype(self, value: str) -> None:
+        self.headers["Content-Type"] = get_content_type(value, self.charset)
+
+    @property
+    def mimetype_params(self) -> t.Dict[str, str]:
+        """The mimetype parameters as dict. For example if the
+        content type is ``text/html; charset=utf-8`` the params would be
+        ``{'charset': 'utf-8'}``.
+
+        .. versionadded:: 0.5
+        """
+
+        def on_update(d: CallbackDict) -> None:
+            self.headers["Content-Type"] = dump_options_header(self.mimetype, d)
+
+        d = parse_options_header(self.headers.get("content-type", ""))[1]
+        return CallbackDict(d, on_update)
+
+    location = header_property[str](
+        "Location",
+        doc="""The Location response-header field is used to redirect
+        the recipient to a location other than the Request-URI for
+        completion of the request or identification of a new
+        resource.""",
+    )
+    age = header_property(
+        "Age",
+        None,
+        parse_age,
+        dump_age,  # type: ignore
+        doc="""The Age response-header field conveys the sender's
+        estimate of the amount of time since the response (or its
+        revalidation) was generated at the origin server.
+
+        Age values are non-negative decimal integers, representing time
+        in seconds.""",
+    )
+    content_type = header_property[str](
+        "Content-Type",
+        doc="""The Content-Type entity-header field indicates the media
+        type of the entity-body sent to the recipient or, in the case of
+        the HEAD method, the media type that would have been sent had
+        the request been a GET.""",
+    )
+    content_length = header_property(
+        "Content-Length",
+        None,
+        int,
+        str,
+        doc="""The Content-Length entity-header field indicates the size
+        of the entity-body, in decimal number of OCTETs, sent to the
+        recipient or, in the case of the HEAD method, the size of the
+        entity-body that would have been sent had the request been a
+        GET.""",
+    )
+    content_location = header_property[str](
+        "Content-Location",
+        doc="""The Content-Location entity-header field MAY be used to
+        supply the resource location for the entity enclosed in the
+        message when that entity is accessible from a location separate
+        from the requested resource's URI.""",
+    )
+    content_encoding = header_property[str](
+        "Content-Encoding",
+        doc="""The Content-Encoding entity-header field is used as a
+        modifier to the media-type. When present, its value indicates
+        what additional content codings have been applied to the
+        entity-body, and thus what decoding mechanisms must be applied
+        in order to obtain the media-type referenced by the Content-Type
+        header field.""",
+    )
+    content_md5 = header_property[str](
+        "Content-MD5",
+        doc="""The Content-MD5 entity-header field, as defined in
+        RFC 1864, is an MD5 digest of the entity-body for the purpose of
+        providing an end-to-end message integrity check (MIC) of the
+        entity-body. (Note: a MIC is good for detecting accidental
+        modification of the entity-body in transit, but is not proof
+        against malicious attacks.)""",
+    )
+    date = header_property(
+        "Date",
+        None,
+        parse_date,
+        http_date,
+        doc="""The Date general-header field represents the date and
+        time at which the message was originated, having the same
+        semantics as orig-date in RFC 822.
+
+        .. versionchanged:: 2.0
+            The datetime object is timezone-aware.
+        """,
+    )
+    expires = header_property(
+        "Expires",
+        None,
+        parse_date,
+        http_date,
+        doc="""The Expires entity-header field gives the date/time after
+        which the response is considered stale. A stale cache entry may
+        not normally be returned by a cache.
+
+        .. versionchanged:: 2.0
+            The datetime object is timezone-aware.
+        """,
+    )
+    last_modified = header_property(
+        "Last-Modified",
+        None,
+        parse_date,
+        http_date,
+        doc="""The Last-Modified entity-header field indicates the date
+        and time at which the origin server believes the variant was
+        last modified.
+
+        .. versionchanged:: 2.0
+            The datetime object is timezone-aware.
+        """,
+    )
+
+    @property
+    def retry_after(self) -> t.Optional[datetime]:
+        """The Retry-After response-header field can be used with a
+        503 (Service Unavailable) response to indicate how long the
+        service is expected to be unavailable to the requesting client.
+
+        Time in seconds until expiration or date.
+
+        .. versionchanged:: 2.0
+            The datetime object is timezone-aware.
+        """
+        value = self.headers.get("retry-after")
+        if value is None:
+            return None
+        elif value.isdigit():
+            return datetime.now(timezone.utc) + timedelta(seconds=int(value))
+        return parse_date(value)
+
+    @retry_after.setter
+    def retry_after(self, value: t.Optional[t.Union[datetime, int, str]]) -> None:
+        if value is None:
+            if "retry-after" in self.headers:
+                del self.headers["retry-after"]
+            return
+        elif isinstance(value, datetime):
+            value = http_date(value)
+        else:
+            value = str(value)
+        self.headers["Retry-After"] = value
+
+    vary = _set_property(
+        "Vary",
+        doc="""The Vary field value indicates the set of request-header
+        fields that fully determines, while the response is fresh,
+        whether a cache is permitted to use the response to reply to a
+        subsequent request without revalidation.""",
+    )
+    content_language = _set_property(
+        "Content-Language",
+        doc="""The Content-Language entity-header field describes the
+        natural language(s) of the intended audience for the enclosed
+        entity. Note that this might not be equivalent to all the
+        languages used within the entity-body.""",
+    )
+    allow = _set_property(
+        "Allow",
+        doc="""The Allow entity-header field lists the set of methods
+        supported by the resource identified by the Request-URI. The
+        purpose of this field is strictly to inform the recipient of
+        valid methods associated with the resource. An Allow header
+        field MUST be present in a 405 (Method Not Allowed)
+        response.""",
+    )
+
+    # ETag
+
+    @property
+    def cache_control(self) -> ResponseCacheControl:
+        """The Cache-Control general-header field is used to specify
+        directives that MUST be obeyed by all caching mechanisms along the
+        request/response chain.
+        """
+
+        def on_update(cache_control: ResponseCacheControl) -> None:
+            if not cache_control and "cache-control" in self.headers:
+                del self.headers["cache-control"]
+            elif cache_control:
+                self.headers["Cache-Control"] = cache_control.to_header()
+
+        return parse_cache_control_header(
+            self.headers.get("cache-control"), on_update, ResponseCacheControl
+        )
+
+    def set_etag(self, etag: str, weak: bool = False) -> None:
+        """Set the etag, and override the old one if there was one."""
+        self.headers["ETag"] = quote_etag(etag, weak)
+
+    def get_etag(self) -> t.Union[t.Tuple[str, bool], t.Tuple[None, None]]:
+        """Return a tuple in the form ``(etag, is_weak)``.  If there is no
+        ETag the return value is ``(None, None)``.
+        """
+        return unquote_etag(self.headers.get("ETag"))
+
+    accept_ranges = header_property[str](
+        "Accept-Ranges",
+        doc="""The `Accept-Ranges` header. Even though the name would
+        indicate that multiple values are supported, it must be one
+        string token only.
+
+        The values ``'bytes'`` and ``'none'`` are common.
+
+        .. versionadded:: 0.7""",
+    )
+
+    @property
+    def content_range(self) -> ContentRange:
+        """The ``Content-Range`` header as a
+        :class:`~werkzeug.datastructures.ContentRange` object. Available
+        even if the header is not set.
+
+        .. versionadded:: 0.7
+        """
+
+        def on_update(rng: ContentRange) -> None:
+            if not rng:
+                del self.headers["content-range"]
+            else:
+                self.headers["Content-Range"] = rng.to_header()
+
+        rv = parse_content_range_header(self.headers.get("content-range"), on_update)
+        # always provide a content range object to make the descriptor
+        # more user friendly.  It provides an unset() method that can be
+        # used to remove the header quickly.
+        if rv is None:
+            rv = ContentRange(None, None, None, on_update=on_update)
+        return rv
+
+    @content_range.setter
+    def content_range(self, value: t.Optional[t.Union[ContentRange, str]]) -> None:
+        if not value:
+            del self.headers["content-range"]
+        elif isinstance(value, str):
+            self.headers["Content-Range"] = value
+        else:
+            self.headers["Content-Range"] = value.to_header()
+
+    # Authorization
+
+    @property
+    def www_authenticate(self) -> WWWAuthenticate:
+        """The ``WWW-Authenticate`` header in a parsed form."""
+
+        def on_update(www_auth: WWWAuthenticate) -> None:
+            if not www_auth and "www-authenticate" in self.headers:
+                del self.headers["www-authenticate"]
+            elif www_auth:
+                self.headers["WWW-Authenticate"] = www_auth.to_header()
+
+        header = self.headers.get("www-authenticate")
+        return parse_www_authenticate_header(header, on_update)
+
+    # CSP
+
+    @property
+    def content_security_policy(self) -> ContentSecurityPolicy:
+        """The ``Content-Security-Policy`` header as a
+        :class:`~werkzeug.datastructures.ContentSecurityPolicy` object. Available
+        even if the header is not set.
+
+        The Content-Security-Policy header adds an additional layer of
+        security to help detect and mitigate certain types of attacks.
+        """
+
+        def on_update(csp: ContentSecurityPolicy) -> None:
+            if not csp:
+                del self.headers["content-security-policy"]
+            else:
+                self.headers["Content-Security-Policy"] = csp.to_header()
+
+        rv = parse_csp_header(self.headers.get("content-security-policy"), on_update)
+        if rv is None:
+            rv = ContentSecurityPolicy(None, on_update=on_update)
+        return rv
+
+    @content_security_policy.setter
+    def content_security_policy(
+        self, value: t.Optional[t.Union[ContentSecurityPolicy, str]]
+    ) -> None:
+        if not value:
+            del self.headers["content-security-policy"]
+        elif isinstance(value, str):
+            self.headers["Content-Security-Policy"] = value
+        else:
+            self.headers["Content-Security-Policy"] = value.to_header()
+
+    @property
+    def content_security_policy_report_only(self) -> ContentSecurityPolicy:
+        """The ``Content-Security-policy-report-only`` header as a
+        :class:`~werkzeug.datastructures.ContentSecurityPolicy` object. Available
+        even if the header is not set.
+
+        The Content-Security-Policy-Report-Only header adds a csp policy
+        that is not enforced but is reported thereby helping detect
+        certain types of attacks.
+        """
+
+        def on_update(csp: ContentSecurityPolicy) -> None:
+            if not csp:
+                del self.headers["content-security-policy-report-only"]
+            else:
+                self.headers["Content-Security-policy-report-only"] = csp.to_header()
+
+        rv = parse_csp_header(
+            self.headers.get("content-security-policy-report-only"), on_update
+        )
+        if rv is None:
+            rv = ContentSecurityPolicy(None, on_update=on_update)
+        return rv
+
+    @content_security_policy_report_only.setter
+    def content_security_policy_report_only(
+        self, value: t.Optional[t.Union[ContentSecurityPolicy, str]]
+    ) -> None:
+        if not value:
+            del self.headers["content-security-policy-report-only"]
+        elif isinstance(value, str):
+            self.headers["Content-Security-policy-report-only"] = value
+        else:
+            self.headers["Content-Security-policy-report-only"] = value.to_header()
+
+    # CORS
+
+    @property
+    def access_control_allow_credentials(self) -> bool:
+        """Whether credentials can be shared by the browser to
+        JavaScript code. As part of the preflight request it indicates
+        whether credentials can be used on the cross origin request.
+        """
+        return "Access-Control-Allow-Credentials" in self.headers
+
+    @access_control_allow_credentials.setter
+    def access_control_allow_credentials(self, value: t.Optional[bool]) -> None:
+        if value is True:
+            self.headers["Access-Control-Allow-Credentials"] = "true"
+        else:
+            self.headers.pop("Access-Control-Allow-Credentials", None)
+
+    access_control_allow_headers = header_property(
+        "Access-Control-Allow-Headers",
+        load_func=parse_set_header,
+        dump_func=dump_header,
+        doc="Which headers can be sent with the cross origin request.",
+    )
+
+    access_control_allow_methods = header_property(
+        "Access-Control-Allow-Methods",
+        load_func=parse_set_header,
+        dump_func=dump_header,
+        doc="Which methods can be used for the cross origin request.",
+    )
+
+    access_control_allow_origin = header_property[str](
+        "Access-Control-Allow-Origin",
+        doc="The origin or '*' for any origin that may make cross origin requests.",
+    )
+
+    access_control_expose_headers = header_property(
+        "Access-Control-Expose-Headers",
+        load_func=parse_set_header,
+        dump_func=dump_header,
+        doc="Which headers can be shared by the browser to JavaScript code.",
+    )
+
+    access_control_max_age = header_property(
+        "Access-Control-Max-Age",
+        load_func=int,
+        dump_func=str,
+        doc="The maximum age in seconds the access control settings can be cached for.",
+    )
+
+    cross_origin_opener_policy = header_property[COOP](
+        "Cross-Origin-Opener-Policy",
+        load_func=lambda value: COOP(value),
+        dump_func=lambda value: value.value,
+        default=COOP.UNSAFE_NONE,
+        doc="""Allows control over sharing of browsing context group with cross-origin
+        documents. Values must be a member of the :class:`werkzeug.http.COOP` enum.""",
+    )
+
+    cross_origin_embedder_policy = header_property[COEP](
+        "Cross-Origin-Embedder-Policy",
+        load_func=lambda value: COEP(value),
+        dump_func=lambda value: value.value,
+        default=COEP.UNSAFE_NONE,
+        doc="""Prevents a document from loading any cross-origin resources that do not
+        explicitly grant the document permission. Values must be a member of the
+        :class:`werkzeug.http.COEP` enum.""",
+    )
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/sansio/utils.py b/.venv/lib/python3.6/site-packages/werkzeug/sansio/utils.py
new file mode 100644
index 0000000..1b4d892
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/sansio/utils.py
@@ -0,0 +1,142 @@
+import typing as t
+
+from .._internal import _encode_idna
+from ..exceptions import SecurityError
+from ..urls import uri_to_iri
+from ..urls import url_quote
+
+
+def host_is_trusted(hostname: str, trusted_list: t.Iterable[str]) -> bool:
+    """Check if a host matches a list of trusted names.
+
+    :param hostname: The name to check.
+    :param trusted_list: A list of valid names to match. If a name
+        starts with a dot it will match all subdomains.
+
+    .. versionadded:: 0.9
+    """
+    if not hostname:
+        return False
+
+    if isinstance(trusted_list, str):
+        trusted_list = [trusted_list]
+
+    def _normalize(hostname: str) -> bytes:
+        if ":" in hostname:
+            hostname = hostname.rsplit(":", 1)[0]
+
+        return _encode_idna(hostname)
+
+    try:
+        hostname_bytes = _normalize(hostname)
+    except UnicodeError:
+        return False
+
+    for ref in trusted_list:
+        if ref.startswith("."):
+            ref = ref[1:]
+            suffix_match = True
+        else:
+            suffix_match = False
+
+        try:
+            ref_bytes = _normalize(ref)
+        except UnicodeError:
+            return False
+
+        if ref_bytes == hostname_bytes:
+            return True
+
+        if suffix_match and hostname_bytes.endswith(b"." + ref_bytes):
+            return True
+
+    return False
+
+
+def get_host(
+    scheme: str,
+    host_header: t.Optional[str],
+    server: t.Optional[t.Tuple[str, t.Optional[int]]] = None,
+    trusted_hosts: t.Optional[t.Iterable[str]] = None,
+) -> str:
+    """Return the host for the given parameters.
+
+    This first checks the ``host_header``. If it's not present, then
+    ``server`` is used. The host will only contain the port if it is
+    different than the standard port for the protocol.
+
+    Optionally, verify that the host is trusted using
+    :func:`host_is_trusted` and raise a
+    :exc:`~werkzeug.exceptions.SecurityError` if it is not.
+
+    :param scheme: The protocol the request used, like ``"https"``.
+    :param host_header: The ``Host`` header value.
+    :param server: Address of the server. ``(host, port)``, or
+        ``(path, None)`` for unix sockets.
+    :param trusted_hosts: A list of trusted host names.
+
+    :return: Host, with port if necessary.
+    :raise ~werkzeug.exceptions.SecurityError: If the host is not
+        trusted.
+    """
+    host = ""
+
+    if host_header is not None:
+        host = host_header
+    elif server is not None:
+        host = server[0]
+
+        if server[1] is not None:
+            host = f"{host}:{server[1]}"
+
+    if scheme in {"http", "ws"} and host.endswith(":80"):
+        host = host[:-3]
+    elif scheme in {"https", "wss"} and host.endswith(":443"):
+        host = host[:-4]
+
+    if trusted_hosts is not None:
+        if not host_is_trusted(host, trusted_hosts):
+            raise SecurityError(f"Host {host!r} is not trusted.")
+
+    return host
+
+
+def get_current_url(
+    scheme: str,
+    host: str,
+    root_path: t.Optional[str] = None,
+    path: t.Optional[str] = None,
+    query_string: t.Optional[bytes] = None,
+) -> str:
+    """Recreate the URL for a request. If an optional part isn't
+    provided, it and subsequent parts are not included in the URL.
+
+    The URL is an IRI, not a URI, so it may contain Unicode characters.
+    Use :func:`~werkzeug.urls.iri_to_uri` to convert it to ASCII.
+
+    :param scheme: The protocol the request used, like ``"https"``.
+    :param host: The host the request was made to. See :func:`get_host`.
+    :param root_path: Prefix that the application is mounted under. This
+        is prepended to ``path``.
+    :param path: The path part of the URL after ``root_path``.
+    :param query_string: The portion of the URL after the "?".
+    """
+    url = [scheme, "://", host]
+
+    if root_path is None:
+        url.append("/")
+        return uri_to_iri("".join(url))
+
+    url.append(url_quote(root_path.rstrip("/")))
+    url.append("/")
+
+    if path is None:
+        return uri_to_iri("".join(url))
+
+    url.append(url_quote(path.lstrip("/")))
+
+    if query_string:
+        url.append("?")
+        url.append(url_quote(query_string, safe=":&%=+$!*'(),"))
+
+    return uri_to_iri("".join(url))
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/security.py b/.venv/lib/python3.6/site-packages/werkzeug/security.py
new file mode 100644
index 0000000..e23040a
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/security.py
@@ -0,0 +1,247 @@
+import hashlib
+import hmac
+import os
+import posixpath
+import secrets
+import typing as t
+import warnings
+
+if t.TYPE_CHECKING:
+    pass
+
+SALT_CHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
+DEFAULT_PBKDF2_ITERATIONS = 260000
+
+_os_alt_seps: t.List[str] = list(
+    sep for sep in [os.path.sep, os.path.altsep] if sep is not None and sep != "/"
+)
+
+
+def pbkdf2_hex(
+    data: t.Union[str, bytes],
+    salt: t.Union[str, bytes],
+    iterations: int = DEFAULT_PBKDF2_ITERATIONS,
+    keylen: t.Optional[int] = None,
+    hashfunc: t.Optional[t.Union[str, t.Callable]] = None,
+) -> str:
+    """Like :func:`pbkdf2_bin`, but returns a hex-encoded string.
+
+    :param data: the data to derive.
+    :param salt: the salt for the derivation.
+    :param iterations: the number of iterations.
+    :param keylen: the length of the resulting key.  If not provided,
+                   the digest size will be used.
+    :param hashfunc: the hash function to use.  This can either be the
+                     string name of a known hash function, or a function
+                     from the hashlib module.  Defaults to sha256.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Use :func:`hashlib.pbkdf2_hmac`
+        instead.
+
+    .. versionadded:: 0.9
+    """
+    warnings.warn(
+        "'pbkdf2_hex' is deprecated and will be removed in Werkzeug"
+        " 2.1. Use 'hashlib.pbkdf2_hmac().hex()' instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return pbkdf2_bin(data, salt, iterations, keylen, hashfunc).hex()
+
+
+def pbkdf2_bin(
+    data: t.Union[str, bytes],
+    salt: t.Union[str, bytes],
+    iterations: int = DEFAULT_PBKDF2_ITERATIONS,
+    keylen: t.Optional[int] = None,
+    hashfunc: t.Optional[t.Union[str, t.Callable]] = None,
+) -> bytes:
+    """Returns a binary digest for the PBKDF2 hash algorithm of `data`
+    with the given `salt`. It iterates `iterations` times and produces a
+    key of `keylen` bytes. By default, SHA-256 is used as hash function;
+    a different hashlib `hashfunc` can be provided.
+
+    :param data: the data to derive.
+    :param salt: the salt for the derivation.
+    :param iterations: the number of iterations.
+    :param keylen: the length of the resulting key.  If not provided
+                   the digest size will be used.
+    :param hashfunc: the hash function to use.  This can either be the
+                     string name of a known hash function or a function
+                     from the hashlib module.  Defaults to sha256.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Use :func:`hashlib.pbkdf2_hmac`
+        instead.
+
+    .. versionadded:: 0.9
+    """
+    warnings.warn(
+        "'pbkdf2_bin' is deprecated and will be removed in Werkzeug"
+        " 2.1. Use 'hashlib.pbkdf2_hmac()' instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+
+    if isinstance(data, str):
+        data = data.encode("utf8")
+
+    if isinstance(salt, str):
+        salt = salt.encode("utf8")
+
+    if not hashfunc:
+        hash_name = "sha256"
+    elif callable(hashfunc):
+        hash_name = hashfunc().name
+    else:
+        hash_name = hashfunc
+
+    return hashlib.pbkdf2_hmac(hash_name, data, salt, iterations, keylen)
+
+
+def safe_str_cmp(a: str, b: str) -> bool:
+    """This function compares strings in somewhat constant time.  This
+    requires that the length of at least one string is known in advance.
+
+    Returns `True` if the two strings are equal, or `False` if they are not.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Use
+        :func:`hmac.compare_digest` instead.
+
+    .. versionadded:: 0.7
+    """
+    warnings.warn(
+        "'safe_str_cmp' is deprecated and will be removed in Werkzeug"
+        " 2.1. Use 'hmac.compare_digest' instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+
+    if isinstance(a, str):
+        a = a.encode("utf-8")  # type: ignore
+
+    if isinstance(b, str):
+        b = b.encode("utf-8")  # type: ignore
+
+    return hmac.compare_digest(a, b)
+
+
+def gen_salt(length: int) -> str:
+    """Generate a random string of SALT_CHARS with specified ``length``."""
+    if length <= 0:
+        raise ValueError("Salt length must be positive")
+
+    return "".join(secrets.choice(SALT_CHARS) for _ in range(length))
+
+
+def _hash_internal(method: str, salt: str, password: str) -> t.Tuple[str, str]:
+    """Internal password hash helper.  Supports plaintext without salt,
+    unsalted and salted passwords.  In case salted passwords are used
+    hmac is used.
+    """
+    if method == "plain":
+        return password, method
+
+    salt = salt.encode("utf-8")
+    password = password.encode("utf-8")
+
+    if method.startswith("pbkdf2:"):
+        if not salt:
+            raise ValueError("Salt is required for PBKDF2")
+
+        args = method[7:].split(":")
+
+        if len(args) not in (1, 2):
+            raise ValueError("Invalid number of arguments for PBKDF2")
+
+        method = args.pop(0)
+        iterations = int(args[0] or 0) if args else DEFAULT_PBKDF2_ITERATIONS
+        return (
+            hashlib.pbkdf2_hmac(method, password, salt, iterations).hex(),
+            f"pbkdf2:{method}:{iterations}",
+        )
+
+    if salt:
+        return hmac.new(salt, password, method).hexdigest(), method
+
+    return hashlib.new(method, password).hexdigest(), method
+
+
+def generate_password_hash(
+    password: str, method: str = "pbkdf2:sha256", salt_length: int = 16
+) -> str:
+    """Hash a password with the given method and salt with a string of
+    the given length. The format of the string returned includes the method
+    that was used so that :func:`check_password_hash` can check the hash.
+
+    The format for the hashed string looks like this::
+
+        method$salt$hash
+
+    This method can **not** generate unsalted passwords but it is possible
+    to set param method='plain' in order to enforce plaintext passwords.
+    If a salt is used, hmac is used internally to salt the password.
+
+    If PBKDF2 is wanted it can be enabled by setting the method to
+    ``pbkdf2:method:iterations`` where iterations is optional::
+
+        pbkdf2:sha256:80000$salt$hash
+        pbkdf2:sha256$salt$hash
+
+    :param password: the password to hash.
+    :param method: the hash method to use (one that hashlib supports). Can
+                   optionally be in the format ``pbkdf2:method:iterations``
+                   to enable PBKDF2.
+    :param salt_length: the length of the salt in letters.
+    """
+    salt = gen_salt(salt_length) if method != "plain" else ""
+    h, actual_method = _hash_internal(method, salt, password)
+    return f"{actual_method}${salt}${h}"
+
+
+def check_password_hash(pwhash: str, password: str) -> bool:
+    """Check a password against a given salted and hashed password value.
+    In order to support unsalted legacy passwords this method supports
+    plain text passwords, md5 and sha1 hashes (both salted and unsalted).
+
+    Returns `True` if the password matched, `False` otherwise.
+
+    :param pwhash: a hashed string like returned by
+                   :func:`generate_password_hash`.
+    :param password: the plaintext password to compare against the hash.
+    """
+    if pwhash.count("$") < 2:
+        return False
+
+    method, salt, hashval = pwhash.split("$", 2)
+    return hmac.compare_digest(_hash_internal(method, salt, password)[0], hashval)
+
+
+def safe_join(directory: str, *pathnames: str) -> t.Optional[str]:
+    """Safely join zero or more untrusted path components to a base
+    directory to avoid escaping the base directory.
+
+    :param directory: The trusted base directory.
+    :param pathnames: The untrusted path components relative to the
+        base directory.
+    :return: A safe path, otherwise ``None``.
+    """
+    parts = [directory]
+
+    for filename in pathnames:
+        if filename != "":
+            filename = posixpath.normpath(filename)
+
+        if (
+            any(sep in filename for sep in _os_alt_seps)
+            or os.path.isabs(filename)
+            or filename == ".."
+            or filename.startswith("../")
+        ):
+            return None
+
+        parts.append(filename)
+
+    return posixpath.join(*parts)
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/serving.py b/.venv/lib/python3.6/site-packages/werkzeug/serving.py
new file mode 100644
index 0000000..197b6fb
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/serving.py
@@ -0,0 +1,1081 @@
+"""A WSGI and HTTP server for use **during development only**. This
+server is convenient to use, but is not designed to be particularly
+stable, secure, or efficient. Use a dedicate WSGI server and HTTP
+server when deploying to production.
+
+It provides features like interactive debugging and code reloading. Use
+``run_simple`` to start the server. Put this in a ``run.py`` script:
+
+.. code-block:: python
+
+    from myapp import create_app
+    from werkzeug import run_simple
+"""
+import io
+import os
+import platform
+import signal
+import socket
+import socketserver
+import sys
+import typing as t
+import warnings
+from datetime import datetime as dt
+from datetime import timedelta
+from datetime import timezone
+from http.server import BaseHTTPRequestHandler
+from http.server import HTTPServer
+
+from ._internal import _log
+from ._internal import _wsgi_encoding_dance
+from .exceptions import InternalServerError
+from .urls import uri_to_iri
+from .urls import url_parse
+from .urls import url_unquote
+
+try:
+    import ssl
+except ImportError:
+
+    class _SslDummy:
+        def __getattr__(self, name: str) -> t.Any:
+            raise RuntimeError("SSL support unavailable")  # noqa: B904
+
+    ssl = _SslDummy()  # type: ignore
+
+_log_add_style = True
+
+if os.name == "nt":
+    try:
+        __import__("colorama")
+    except ImportError:
+        _log_add_style = False
+
+can_fork = hasattr(os, "fork")
+
+if can_fork:
+    ForkingMixIn = socketserver.ForkingMixIn
+else:
+
+    class ForkingMixIn:  # type: ignore
+        pass
+
+
+try:
+    af_unix = socket.AF_UNIX
+except AttributeError:
+    af_unix = None  # type: ignore
+
+LISTEN_QUEUE = 128
+can_open_by_fd = not platform.system() == "Windows" and hasattr(socket, "fromfd")
+
+_TSSLContextArg = t.Optional[
+    t.Union["ssl.SSLContext", t.Tuple[str, t.Optional[str]], "te.Literal['adhoc']"]
+]
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te  # noqa: F401
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+    from cryptography.hazmat.primitives.asymmetric.rsa import (
+        RSAPrivateKeyWithSerialization,
+    )
+    from cryptography.x509 import Certificate
+
+
+class DechunkedInput(io.RawIOBase):
+    """An input stream that handles Transfer-Encoding 'chunked'"""
+
+    def __init__(self, rfile: t.IO[bytes]) -> None:
+        self._rfile = rfile
+        self._done = False
+        self._len = 0
+
+    def readable(self) -> bool:
+        return True
+
+    def read_chunk_len(self) -> int:
+        try:
+            line = self._rfile.readline().decode("latin1")
+            _len = int(line.strip(), 16)
+        except ValueError as e:
+            raise OSError("Invalid chunk header") from e
+        if _len < 0:
+            raise OSError("Negative chunk length not allowed")
+        return _len
+
+    def readinto(self, buf: bytearray) -> int:  # type: ignore
+        read = 0
+        while not self._done and read < len(buf):
+            if self._len == 0:
+                # This is the first chunk or we fully consumed the previous
+                # one. Read the next length of the next chunk
+                self._len = self.read_chunk_len()
+
+            if self._len == 0:
+                # Found the final chunk of size 0. The stream is now exhausted,
+                # but there is still a final newline that should be consumed
+                self._done = True
+
+            if self._len > 0:
+                # There is data (left) in this chunk, so append it to the
+                # buffer. If this operation fully consumes the chunk, this will
+                # reset self._len to 0.
+                n = min(len(buf), self._len)
+
+                # If (read + chunk size) becomes more than len(buf), buf will
+                # grow beyond the original size and read more data than
+                # required. So only read as much data as can fit in buf.
+                if read + n > len(buf):
+                    buf[read:] = self._rfile.read(len(buf) - read)
+                    self._len -= len(buf) - read
+                    read = len(buf)
+                else:
+                    buf[read : read + n] = self._rfile.read(n)
+                    self._len -= n
+                    read += n
+
+            if self._len == 0:
+                # Skip the terminating newline of a chunk that has been fully
+                # consumed. This also applies to the 0-sized final chunk
+                terminator = self._rfile.readline()
+                if terminator not in (b"\n", b"\r\n", b"\r"):
+                    raise OSError("Missing chunk terminating newline")
+
+        return read
+
+
+class WSGIRequestHandler(BaseHTTPRequestHandler):
+    """A request handler that implements WSGI dispatching."""
+
+    server: "BaseWSGIServer"
+
+    @property
+    def server_version(self) -> str:  # type: ignore
+        from . import __version__
+
+        return f"Werkzeug/{__version__}"
+
+    def make_environ(self) -> "WSGIEnvironment":
+        request_url = url_parse(self.path)
+
+        def shutdown_server() -> None:
+            warnings.warn(
+                "The 'environ['werkzeug.server.shutdown']' function is"
+                " deprecated and will be removed in Werkzeug 2.1.",
+                stacklevel=2,
+            )
+            self.server.shutdown_signal = True
+
+        url_scheme = "http" if self.server.ssl_context is None else "https"
+
+        if not self.client_address:
+            self.client_address = ("", 0)
+        elif isinstance(self.client_address, str):
+            self.client_address = (self.client_address, 0)
+
+        # If there was no scheme but the path started with two slashes,
+        # the first segment may have been incorrectly parsed as the
+        # netloc, prepend it to the path again.
+        if not request_url.scheme and request_url.netloc:
+            path_info = f"/{request_url.netloc}{request_url.path}"
+        else:
+            path_info = request_url.path
+
+        path_info = url_unquote(path_info)
+
+        environ: "WSGIEnvironment" = {
+            "wsgi.version": (1, 0),
+            "wsgi.url_scheme": url_scheme,
+            "wsgi.input": self.rfile,
+            "wsgi.errors": sys.stderr,
+            "wsgi.multithread": self.server.multithread,
+            "wsgi.multiprocess": self.server.multiprocess,
+            "wsgi.run_once": False,
+            "werkzeug.server.shutdown": shutdown_server,
+            "werkzeug.socket": self.connection,
+            "SERVER_SOFTWARE": self.server_version,
+            "REQUEST_METHOD": self.command,
+            "SCRIPT_NAME": "",
+            "PATH_INFO": _wsgi_encoding_dance(path_info),
+            "QUERY_STRING": _wsgi_encoding_dance(request_url.query),
+            # Non-standard, added by mod_wsgi, uWSGI
+            "REQUEST_URI": _wsgi_encoding_dance(self.path),
+            # Non-standard, added by gunicorn
+            "RAW_URI": _wsgi_encoding_dance(self.path),
+            "REMOTE_ADDR": self.address_string(),
+            "REMOTE_PORT": self.port_integer(),
+            "SERVER_NAME": self.server.server_address[0],
+            "SERVER_PORT": str(self.server.server_address[1]),
+            "SERVER_PROTOCOL": self.request_version,
+        }
+
+        for key, value in self.headers.items():
+            key = key.upper().replace("-", "_")
+            value = value.replace("\r\n", "")
+            if key not in ("CONTENT_TYPE", "CONTENT_LENGTH"):
+                key = f"HTTP_{key}"
+                if key in environ:
+                    value = f"{environ[key]},{value}"
+            environ[key] = value
+
+        if environ.get("HTTP_TRANSFER_ENCODING", "").strip().lower() == "chunked":
+            environ["wsgi.input_terminated"] = True
+            environ["wsgi.input"] = DechunkedInput(environ["wsgi.input"])
+
+        # Per RFC 2616, if the URL is absolute, use that as the host.
+        # We're using "has a scheme" to indicate an absolute URL.
+        if request_url.scheme and request_url.netloc:
+            environ["HTTP_HOST"] = request_url.netloc
+
+        try:
+            # binary_form=False gives nicer information, but wouldn't be compatible with
+            # what Nginx or Apache could return.
+            peer_cert = self.connection.getpeercert(binary_form=True)
+            if peer_cert is not None:
+                # Nginx and Apache use PEM format.
+                environ["SSL_CLIENT_CERT"] = ssl.DER_cert_to_PEM_cert(peer_cert)
+        except ValueError:
+            # SSL handshake hasn't finished.
+            self.server.log("error", "Cannot fetch SSL peer certificate info")
+        except AttributeError:
+            # Not using TLS, the socket will not have getpeercert().
+            pass
+
+        return environ
+
+    def run_wsgi(self) -> None:
+        if self.headers.get("Expect", "").lower().strip() == "100-continue":
+            self.wfile.write(b"HTTP/1.1 100 Continue\r\n\r\n")
+
+        self.environ = environ = self.make_environ()
+        status_set: t.Optional[str] = None
+        headers_set: t.Optional[t.List[t.Tuple[str, str]]] = None
+        status_sent: t.Optional[str] = None
+        headers_sent: t.Optional[t.List[t.Tuple[str, str]]] = None
+
+        def write(data: bytes) -> None:
+            nonlocal status_sent, headers_sent
+            assert status_set is not None, "write() before start_response"
+            assert headers_set is not None, "write() before start_response"
+            if status_sent is None:
+                status_sent = status_set
+                headers_sent = headers_set
+                try:
+                    code_str, msg = status_sent.split(None, 1)
+                except ValueError:
+                    code_str, msg = status_sent, ""
+                code = int(code_str)
+                self.send_response(code, msg)
+                header_keys = set()
+                for key, value in headers_sent:
+                    self.send_header(key, value)
+                    key = key.lower()
+                    header_keys.add(key)
+                if not (
+                    "content-length" in header_keys
+                    or environ["REQUEST_METHOD"] == "HEAD"
+                    or code < 200
+                    or code in (204, 304)
+                ):
+                    self.close_connection = True
+                    self.send_header("Connection", "close")
+                if "server" not in header_keys:
+                    self.send_header("Server", self.version_string())
+                if "date" not in header_keys:
+                    self.send_header("Date", self.date_time_string())
+                self.end_headers()
+
+            assert isinstance(data, bytes), "applications must write bytes"
+            self.wfile.write(data)
+            self.wfile.flush()
+
+        def start_response(status, headers, exc_info=None):  # type: ignore
+            nonlocal status_set, headers_set
+            if exc_info:
+                try:
+                    if headers_sent:
+                        raise exc_info[1].with_traceback(exc_info[2])
+                finally:
+                    exc_info = None
+            elif headers_set:
+                raise AssertionError("Headers already set")
+            status_set = status
+            headers_set = headers
+            return write
+
+        def execute(app: "WSGIApplication") -> None:
+            application_iter = app(environ, start_response)
+            try:
+                for data in application_iter:
+                    write(data)
+                if not headers_sent:
+                    write(b"")
+            finally:
+                if hasattr(application_iter, "close"):
+                    application_iter.close()  # type: ignore
+
+        try:
+            execute(self.server.app)
+        except (ConnectionError, socket.timeout) as e:
+            self.connection_dropped(e, environ)
+        except Exception:
+            if self.server.passthrough_errors:
+                raise
+            from .debug.tbtools import get_current_traceback
+
+            traceback = get_current_traceback(ignore_system_exceptions=True)
+            try:
+                # if we haven't yet sent the headers but they are set
+                # we roll back to be able to set them again.
+                if status_sent is None:
+                    status_set = None
+                    headers_set = None
+                execute(InternalServerError())
+            except Exception:
+                pass
+            self.server.log("error", "Error on request:\n%s", traceback.plaintext)
+
+    def handle(self) -> None:
+        """Handles a request ignoring dropped connections."""
+        try:
+            BaseHTTPRequestHandler.handle(self)
+        except (ConnectionError, socket.timeout) as e:
+            self.connection_dropped(e)
+        except Exception as e:
+            if self.server.ssl_context is not None and is_ssl_error(e):
+                self.log_error("SSL error occurred: %s", e)
+            else:
+                raise
+        if self.server.shutdown_signal:
+            self.initiate_shutdown()
+
+    def initiate_shutdown(self) -> None:
+        if is_running_from_reloader():
+            # Windows does not provide SIGKILL, go with SIGTERM then.
+            sig = getattr(signal, "SIGKILL", signal.SIGTERM)
+            os.kill(os.getpid(), sig)
+
+        self.server._BaseServer__shutdown_request = True  # type: ignore
+
+    def connection_dropped(
+        self, error: BaseException, environ: t.Optional["WSGIEnvironment"] = None
+    ) -> None:
+        """Called if the connection was closed by the client.  By default
+        nothing happens.
+        """
+
+    def handle_one_request(self) -> None:
+        """Handle a single HTTP request."""
+        self.raw_requestline = self.rfile.readline()
+        if not self.raw_requestline:
+            self.close_connection = True
+        elif self.parse_request():
+            self.run_wsgi()
+
+    def send_response(self, code: int, message: t.Optional[str] = None) -> None:
+        """Send the response header and log the response code."""
+        self.log_request(code)
+        if message is None:
+            message = self.responses[code][0] if code in self.responses else ""
+        if self.request_version != "HTTP/0.9":
+            hdr = f"{self.protocol_version} {code} {message}\r\n"
+            self.wfile.write(hdr.encode("ascii"))
+
+    def version_string(self) -> str:
+        return super().version_string().strip()
+
+    def address_string(self) -> str:
+        if getattr(self, "environ", None):
+            return self.environ["REMOTE_ADDR"]  # type: ignore
+
+        if not self.client_address:
+            return ""
+
+        return self.client_address[0]
+
+    def port_integer(self) -> int:
+        return self.client_address[1]
+
+    def log_request(
+        self, code: t.Union[int, str] = "-", size: t.Union[int, str] = "-"
+    ) -> None:
+        try:
+            path = uri_to_iri(self.path)
+            msg = f"{self.command} {path} {self.request_version}"
+        except AttributeError:
+            # path isn't set if the requestline was bad
+            msg = self.requestline
+
+        code = str(code)
+
+        if _log_add_style:
+            if code[0] == "1":  # 1xx - Informational
+                msg = _ansi_style(msg, "bold")
+            elif code == "200":  # 2xx - Success
+                pass
+            elif code == "304":  # 304 - Resource Not Modified
+                msg = _ansi_style(msg, "cyan")
+            elif code[0] == "3":  # 3xx - Redirection
+                msg = _ansi_style(msg, "green")
+            elif code == "404":  # 404 - Resource Not Found
+                msg = _ansi_style(msg, "yellow")
+            elif code[0] == "4":  # 4xx - Client Error
+                msg = _ansi_style(msg, "bold", "red")
+            else:  # 5xx, or any other response
+                msg = _ansi_style(msg, "bold", "magenta")
+
+        self.log("info", '"%s" %s %s', msg, code, size)
+
+    def log_error(self, format: str, *args: t.Any) -> None:
+        self.log("error", format, *args)
+
+    def log_message(self, format: str, *args: t.Any) -> None:
+        self.log("info", format, *args)
+
+    def log(self, type: str, message: str, *args: t.Any) -> None:
+        _log(
+            type,
+            f"{self.address_string()} - - [{self.log_date_time_string()}] {message}\n",
+            *args,
+        )
+
+
+def _ansi_style(value: str, *styles: str) -> str:
+    codes = {
+        "bold": 1,
+        "red": 31,
+        "green": 32,
+        "yellow": 33,
+        "magenta": 35,
+        "cyan": 36,
+    }
+
+    for style in styles:
+        value = f"\x1b[{codes[style]}m{value}"
+
+    return f"{value}\x1b[0m"
+
+
+def generate_adhoc_ssl_pair(
+    cn: t.Optional[str] = None,
+) -> t.Tuple["Certificate", "RSAPrivateKeyWithSerialization"]:
+    try:
+        from cryptography import x509
+        from cryptography.x509.oid import NameOID
+        from cryptography.hazmat.backends import default_backend
+        from cryptography.hazmat.primitives import hashes
+        from cryptography.hazmat.primitives.asymmetric import rsa
+    except ImportError:
+        raise TypeError(
+            "Using ad-hoc certificates requires the cryptography library."
+        ) from None
+
+    backend = default_backend()
+    pkey = rsa.generate_private_key(
+        public_exponent=65537, key_size=2048, backend=backend
+    )
+
+    # pretty damn sure that this is not actually accepted by anyone
+    if cn is None:
+        cn = "*"
+
+    subject = x509.Name(
+        [
+            x509.NameAttribute(NameOID.ORGANIZATION_NAME, "Dummy Certificate"),
+            x509.NameAttribute(NameOID.COMMON_NAME, cn),
+        ]
+    )
+
+    backend = default_backend()
+    cert = (
+        x509.CertificateBuilder()
+        .subject_name(subject)
+        .issuer_name(subject)
+        .public_key(pkey.public_key())
+        .serial_number(x509.random_serial_number())
+        .not_valid_before(dt.now(timezone.utc))
+        .not_valid_after(dt.now(timezone.utc) + timedelta(days=365))
+        .add_extension(x509.ExtendedKeyUsage([x509.OID_SERVER_AUTH]), critical=False)
+        .add_extension(x509.SubjectAlternativeName([x509.DNSName(cn)]), critical=False)
+        .sign(pkey, hashes.SHA256(), backend)
+    )
+    return cert, pkey
+
+
+def make_ssl_devcert(
+    base_path: str, host: t.Optional[str] = None, cn: t.Optional[str] = None
+) -> t.Tuple[str, str]:
+    """Creates an SSL key for development.  This should be used instead of
+    the ``'adhoc'`` key which generates a new cert on each server start.
+    It accepts a path for where it should store the key and cert and
+    either a host or CN.  If a host is given it will use the CN
+    ``*.host/CN=host``.
+
+    For more information see :func:`run_simple`.
+
+    .. versionadded:: 0.9
+
+    :param base_path: the path to the certificate and key.  The extension
+                      ``.crt`` is added for the certificate, ``.key`` is
+                      added for the key.
+    :param host: the name of the host.  This can be used as an alternative
+                 for the `cn`.
+    :param cn: the `CN` to use.
+    """
+
+    if host is not None:
+        cn = f"*.{host}/CN={host}"
+    cert, pkey = generate_adhoc_ssl_pair(cn=cn)
+
+    from cryptography.hazmat.primitives import serialization
+
+    cert_file = f"{base_path}.crt"
+    pkey_file = f"{base_path}.key"
+
+    with open(cert_file, "wb") as f:
+        f.write(cert.public_bytes(serialization.Encoding.PEM))
+    with open(pkey_file, "wb") as f:
+        f.write(
+            pkey.private_bytes(
+                encoding=serialization.Encoding.PEM,
+                format=serialization.PrivateFormat.TraditionalOpenSSL,
+                encryption_algorithm=serialization.NoEncryption(),
+            )
+        )
+
+    return cert_file, pkey_file
+
+
+def generate_adhoc_ssl_context() -> "ssl.SSLContext":
+    """Generates an adhoc SSL context for the development server."""
+    import tempfile
+    import atexit
+
+    cert, pkey = generate_adhoc_ssl_pair()
+
+    from cryptography.hazmat.primitives import serialization
+
+    cert_handle, cert_file = tempfile.mkstemp()
+    pkey_handle, pkey_file = tempfile.mkstemp()
+    atexit.register(os.remove, pkey_file)
+    atexit.register(os.remove, cert_file)
+
+    os.write(cert_handle, cert.public_bytes(serialization.Encoding.PEM))
+    os.write(
+        pkey_handle,
+        pkey.private_bytes(
+            encoding=serialization.Encoding.PEM,
+            format=serialization.PrivateFormat.TraditionalOpenSSL,
+            encryption_algorithm=serialization.NoEncryption(),
+        ),
+    )
+
+    os.close(cert_handle)
+    os.close(pkey_handle)
+    ctx = load_ssl_context(cert_file, pkey_file)
+    return ctx
+
+
+def load_ssl_context(
+    cert_file: str, pkey_file: t.Optional[str] = None, protocol: t.Optional[int] = None
+) -> "ssl.SSLContext":
+    """Loads SSL context from cert/private key files and optional protocol.
+    Many parameters are directly taken from the API of
+    :py:class:`ssl.SSLContext`.
+
+    :param cert_file: Path of the certificate to use.
+    :param pkey_file: Path of the private key to use. If not given, the key
+                      will be obtained from the certificate file.
+    :param protocol: A ``PROTOCOL`` constant from the :mod:`ssl` module.
+        Defaults to :data:`ssl.PROTOCOL_TLS_SERVER`.
+    """
+    if protocol is None:
+        protocol = ssl.PROTOCOL_TLS_SERVER
+
+    ctx = ssl.SSLContext(protocol)
+    ctx.load_cert_chain(cert_file, pkey_file)
+    return ctx
+
+
+def is_ssl_error(error: t.Optional[Exception] = None) -> bool:
+    """Checks if the given error (or the current one) is an SSL error."""
+    if error is None:
+        error = t.cast(Exception, sys.exc_info()[1])
+    return isinstance(error, ssl.SSLError)
+
+
+def select_address_family(host: str, port: int) -> socket.AddressFamily:
+    """Return ``AF_INET4``, ``AF_INET6``, or ``AF_UNIX`` depending on
+    the host and port."""
+    if host.startswith("unix://"):
+        return socket.AF_UNIX
+    elif ":" in host and hasattr(socket, "AF_INET6"):
+        return socket.AF_INET6
+    return socket.AF_INET
+
+
+def get_sockaddr(
+    host: str, port: int, family: socket.AddressFamily
+) -> t.Union[t.Tuple[str, int], str]:
+    """Return a fully qualified socket address that can be passed to
+    :func:`socket.bind`."""
+    if family == af_unix:
+        return host.split("://", 1)[1]
+    try:
+        res = socket.getaddrinfo(
+            host, port, family, socket.SOCK_STREAM, socket.IPPROTO_TCP
+        )
+    except socket.gaierror:
+        return host, port
+    return res[0][4]  # type: ignore
+
+
+def get_interface_ip(family: socket.AddressFamily) -> str:
+    """Get the IP address of an external interface. Used when binding to
+    0.0.0.0 or ::1 to show a more useful URL.
+
+    :meta private:
+    """
+    # arbitrary private address
+    host = "fd31:f903:5ab5:1::1" if family == socket.AF_INET6 else "10.253.155.219"
+
+    with socket.socket(family, socket.SOCK_DGRAM) as s:
+        try:
+            s.connect((host, 58162))
+        except OSError:
+            return "::1" if family == socket.AF_INET6 else "127.0.0.1"
+
+        return s.getsockname()[0]  # type: ignore
+
+
+class BaseWSGIServer(HTTPServer):
+
+    """Simple single-threaded, single-process WSGI server."""
+
+    multithread = False
+    multiprocess = False
+    request_queue_size = LISTEN_QUEUE
+
+    def __init__(
+        self,
+        host: str,
+        port: int,
+        app: "WSGIApplication",
+        handler: t.Optional[t.Type[WSGIRequestHandler]] = None,
+        passthrough_errors: bool = False,
+        ssl_context: t.Optional[_TSSLContextArg] = None,
+        fd: t.Optional[int] = None,
+    ) -> None:
+        if handler is None:
+            handler = WSGIRequestHandler
+
+        self.address_family = select_address_family(host, port)
+
+        if fd is not None:
+            real_sock = socket.fromfd(fd, self.address_family, socket.SOCK_STREAM)
+            port = 0
+
+        server_address = get_sockaddr(host, int(port), self.address_family)
+
+        # remove socket file if it already exists
+        if self.address_family == af_unix:
+            server_address = t.cast(str, server_address)
+
+            if os.path.exists(server_address):
+                os.unlink(server_address)
+
+        super().__init__(server_address, handler)  # type: ignore
+
+        self.app = app
+        self.passthrough_errors = passthrough_errors
+        self.shutdown_signal = False
+        self.host = host
+        self.port = self.socket.getsockname()[1]
+
+        # Patch in the original socket.
+        if fd is not None:
+            self.socket.close()
+            self.socket = real_sock
+            self.server_address = self.socket.getsockname()
+
+        if ssl_context is not None:
+            if isinstance(ssl_context, tuple):
+                ssl_context = load_ssl_context(*ssl_context)
+            if ssl_context == "adhoc":
+                ssl_context = generate_adhoc_ssl_context()
+
+            self.socket = ssl_context.wrap_socket(self.socket, server_side=True)
+            self.ssl_context: t.Optional["ssl.SSLContext"] = ssl_context
+        else:
+            self.ssl_context = None
+
+    def log(self, type: str, message: str, *args: t.Any) -> None:
+        _log(type, message, *args)
+
+    def serve_forever(self, poll_interval: float = 0.5) -> None:
+        self.shutdown_signal = False
+        try:
+            super().serve_forever(poll_interval=poll_interval)
+        except KeyboardInterrupt:
+            pass
+        finally:
+            self.server_close()
+
+    def handle_error(self, request: t.Any, client_address: t.Tuple[str, int]) -> None:
+        if self.passthrough_errors:
+            raise
+
+        return super().handle_error(request, client_address)
+
+
+class ThreadedWSGIServer(socketserver.ThreadingMixIn, BaseWSGIServer):
+
+    """A WSGI server that does threading."""
+
+    multithread = True
+    daemon_threads = True
+
+
+class ForkingWSGIServer(ForkingMixIn, BaseWSGIServer):
+
+    """A WSGI server that does forking."""
+
+    multiprocess = True
+
+    def __init__(
+        self,
+        host: str,
+        port: int,
+        app: "WSGIApplication",
+        processes: int = 40,
+        handler: t.Optional[t.Type[WSGIRequestHandler]] = None,
+        passthrough_errors: bool = False,
+        ssl_context: t.Optional[_TSSLContextArg] = None,
+        fd: t.Optional[int] = None,
+    ) -> None:
+        if not can_fork:
+            raise ValueError("Your platform does not support forking.")
+        BaseWSGIServer.__init__(
+            self, host, port, app, handler, passthrough_errors, ssl_context, fd
+        )
+        self.max_children = processes
+
+
+def make_server(
+    host: str,
+    port: int,
+    app: "WSGIApplication",
+    threaded: bool = False,
+    processes: int = 1,
+    request_handler: t.Optional[t.Type[WSGIRequestHandler]] = None,
+    passthrough_errors: bool = False,
+    ssl_context: t.Optional[_TSSLContextArg] = None,
+    fd: t.Optional[int] = None,
+) -> BaseWSGIServer:
+    """Create a new server instance that is either threaded, or forks
+    or just processes one request after another.
+    """
+    if threaded and processes > 1:
+        raise ValueError("cannot have a multithreaded and multi process server.")
+    elif threaded:
+        return ThreadedWSGIServer(
+            host, port, app, request_handler, passthrough_errors, ssl_context, fd=fd
+        )
+    elif processes > 1:
+        return ForkingWSGIServer(
+            host,
+            port,
+            app,
+            processes,
+            request_handler,
+            passthrough_errors,
+            ssl_context,
+            fd=fd,
+        )
+    else:
+        return BaseWSGIServer(
+            host, port, app, request_handler, passthrough_errors, ssl_context, fd=fd
+        )
+
+
+def is_running_from_reloader() -> bool:
+    """Checks if the application is running from within the Werkzeug
+    reloader subprocess.
+
+    .. versionadded:: 0.10
+    """
+    return os.environ.get("WERKZEUG_RUN_MAIN") == "true"
+
+
+def run_simple(
+    hostname: str,
+    port: int,
+    application: "WSGIApplication",
+    use_reloader: bool = False,
+    use_debugger: bool = False,
+    use_evalex: bool = True,
+    extra_files: t.Optional[t.Iterable[str]] = None,
+    exclude_patterns: t.Optional[t.Iterable[str]] = None,
+    reloader_interval: int = 1,
+    reloader_type: str = "auto",
+    threaded: bool = False,
+    processes: int = 1,
+    request_handler: t.Optional[t.Type[WSGIRequestHandler]] = None,
+    static_files: t.Optional[t.Dict[str, t.Union[str, t.Tuple[str, str]]]] = None,
+    passthrough_errors: bool = False,
+    ssl_context: t.Optional[_TSSLContextArg] = None,
+) -> None:
+    """Start a WSGI application. Optional features include a reloader,
+    multithreading and fork support.
+
+    This function has a command-line interface too::
+
+        python -m werkzeug.serving --help
+
+    .. versionchanged:: 2.0
+        Added ``exclude_patterns`` parameter.
+
+    .. versionadded:: 0.5
+       `static_files` was added to simplify serving of static files as well
+       as `passthrough_errors`.
+
+    .. versionadded:: 0.6
+       support for SSL was added.
+
+    .. versionadded:: 0.8
+       Added support for automatically loading a SSL context from certificate
+       file and private key.
+
+    .. versionadded:: 0.9
+       Added command-line interface.
+
+    .. versionadded:: 0.10
+       Improved the reloader and added support for changing the backend
+       through the `reloader_type` parameter.  See :ref:`reloader`
+       for more information.
+
+    .. versionchanged:: 0.15
+        Bind to a Unix socket by passing a path that starts with
+        ``unix://`` as the ``hostname``.
+
+    :param hostname: The host to bind to, for example ``'localhost'``.
+        If the value is a path that starts with ``unix://`` it will bind
+        to a Unix socket instead of a TCP socket..
+    :param port: The port for the server.  eg: ``8080``
+    :param application: the WSGI application to execute
+    :param use_reloader: should the server automatically restart the python
+                         process if modules were changed?
+    :param use_debugger: should the werkzeug debugging system be used?
+    :param use_evalex: should the exception evaluation feature be enabled?
+    :param extra_files: a list of files the reloader should watch
+                        additionally to the modules.  For example configuration
+                        files.
+    :param exclude_patterns: List of :mod:`fnmatch` patterns to ignore
+        when running the reloader. For example, ignore cache files that
+        shouldn't reload when updated.
+    :param reloader_interval: the interval for the reloader in seconds.
+    :param reloader_type: the type of reloader to use.  The default is
+                          auto detection.  Valid values are ``'stat'`` and
+                          ``'watchdog'``. See :ref:`reloader` for more
+                          information.
+    :param threaded: should the process handle each request in a separate
+                     thread?
+    :param processes: if greater than 1 then handle each request in a new process
+                      up to this maximum number of concurrent processes.
+    :param request_handler: optional parameter that can be used to replace
+                            the default one.  You can use this to replace it
+                            with a different
+                            :class:`~BaseHTTPServer.BaseHTTPRequestHandler`
+                            subclass.
+    :param static_files: a list or dict of paths for static files.  This works
+                         exactly like :class:`SharedDataMiddleware`, it's actually
+                         just wrapping the application in that middleware before
+                         serving.
+    :param passthrough_errors: set this to `True` to disable the error catching.
+                               This means that the server will die on errors but
+                               it can be useful to hook debuggers in (pdb etc.)
+    :param ssl_context: an SSL context for the connection. Either an
+                        :class:`ssl.SSLContext`, a tuple in the form
+                        ``(cert_file, pkey_file)``, the string ``'adhoc'`` if
+                        the server should automatically create one, or ``None``
+                        to disable SSL (which is the default).
+    """
+    if not isinstance(port, int):
+        raise TypeError("port must be an integer")
+    if use_debugger:
+        from .debug import DebuggedApplication
+
+        application = DebuggedApplication(application, use_evalex)
+    if static_files:
+        from .middleware.shared_data import SharedDataMiddleware
+
+        application = SharedDataMiddleware(application, static_files)
+
+    def log_startup(sock: socket.socket) -> None:
+        all_addresses_message = (
+            " * Running on all addresses.\n"
+            "   WARNING: This is a development server. Do not use it in"
+            " a production deployment."
+        )
+
+        if sock.family == af_unix:
+            _log("info", " * Running on %s (Press CTRL+C to quit)", hostname)
+        else:
+            if hostname == "0.0.0.0":
+                _log("warning", all_addresses_message)
+                display_hostname = get_interface_ip(socket.AF_INET)
+            elif hostname == "::":
+                _log("warning", all_addresses_message)
+                display_hostname = get_interface_ip(socket.AF_INET6)
+            else:
+                display_hostname = hostname
+
+            if ":" in display_hostname:
+                display_hostname = f"[{display_hostname}]"
+
+            _log(
+                "info",
+                " * Running on %s://%s:%d/ (Press CTRL+C to quit)",
+                "http" if ssl_context is None else "https",
+                display_hostname,
+                sock.getsockname()[1],
+            )
+
+    def inner() -> None:
+        try:
+            fd: t.Optional[int] = int(os.environ["WERKZEUG_SERVER_FD"])
+        except (LookupError, ValueError):
+            fd = None
+        srv = make_server(
+            hostname,
+            port,
+            application,
+            threaded,
+            processes,
+            request_handler,
+            passthrough_errors,
+            ssl_context,
+            fd=fd,
+        )
+        if fd is None:
+            log_startup(srv.socket)
+        srv.serve_forever()
+
+    if use_reloader:
+        # If we're not running already in the subprocess that is the
+        # reloader we want to open up a socket early to make sure the
+        # port is actually available.
+        if not is_running_from_reloader():
+            if port == 0 and not can_open_by_fd:
+                raise ValueError(
+                    "Cannot bind to a random port with enabled "
+                    "reloader if the Python interpreter does "
+                    "not support socket opening by fd."
+                )
+
+            # Create and destroy a socket so that any exceptions are
+            # raised before we spawn a separate Python interpreter and
+            # lose this ability.
+            address_family = select_address_family(hostname, port)
+            server_address = get_sockaddr(hostname, port, address_family)
+            s = socket.socket(address_family, socket.SOCK_STREAM)
+            s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+            s.bind(server_address)
+            s.set_inheritable(True)
+
+            # If we can open the socket by file descriptor, then we can just
+            # reuse this one and our socket will survive the restarts.
+            if can_open_by_fd:
+                os.environ["WERKZEUG_SERVER_FD"] = str(s.fileno())
+                s.listen(LISTEN_QUEUE)
+                log_startup(s)
+            else:
+                s.close()
+                if address_family == af_unix:
+                    server_address = t.cast(str, server_address)
+                    _log("info", "Unlinking %s", server_address)
+                    os.unlink(server_address)
+
+        from ._reloader import run_with_reloader as _rwr
+
+        _rwr(
+            inner,
+            extra_files=extra_files,
+            exclude_patterns=exclude_patterns,
+            interval=reloader_interval,
+            reloader_type=reloader_type,
+        )
+    else:
+        inner()
+
+
+def run_with_reloader(*args: t.Any, **kwargs: t.Any) -> None:
+    """Run a process with the reloader. This is not a public API, do
+    not use this function.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1.
+    """
+    from ._reloader import run_with_reloader as _rwr
+
+    warnings.warn(
+        (
+            "'run_with_reloader' is a private API, it will no longer be"
+            " accessible in Werkzeug 2.1. Use 'run_simple' instead."
+        ),
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    _rwr(*args, **kwargs)
+
+
+def main() -> None:
+    """A simple command-line interface for :py:func:`run_simple`."""
+    import argparse
+    from .utils import import_string
+
+    _log("warning", "This CLI is deprecated and will be removed in version 2.1.")
+
+    parser = argparse.ArgumentParser(
+        description="Run the given WSGI application with the development server.",
+        allow_abbrev=False,
+    )
+    parser.add_argument(
+        "-b",
+        "--bind",
+        dest="address",
+        help="The hostname:port the app should listen on.",
+    )
+    parser.add_argument(
+        "-d",
+        "--debug",
+        action="store_true",
+        help="Show the interactive debugger for unhandled exceptions.",
+    )
+    parser.add_argument(
+        "-r",
+        "--reload",
+        action="store_true",
+        help="Reload the process if modules change.",
+    )
+    parser.add_argument(
+        "application", help="Application to import and serve, in the form module:app."
+    )
+    args = parser.parse_args()
+    hostname, port = None, None
+
+    if args.address:
+        hostname, _, port = args.address.partition(":")
+
+    run_simple(
+        hostname=hostname or "127.0.0.1",
+        port=int(port or 5000),
+        application=import_string(args.application),
+        use_reloader=args.reload,
+        use_debugger=args.debug,
+    )
+
+
+if __name__ == "__main__":
+    main()
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/test.py b/.venv/lib/python3.6/site-packages/werkzeug/test.py
new file mode 100644
index 0000000..09cb7e8
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/test.py
@@ -0,0 +1,1326 @@
+import mimetypes
+import sys
+import typing as t
+import warnings
+from collections import defaultdict
+from datetime import datetime
+from datetime import timedelta
+from http.cookiejar import CookieJar
+from io import BytesIO
+from itertools import chain
+from random import random
+from tempfile import TemporaryFile
+from time import time
+from urllib.request import Request as _UrllibRequest
+
+from ._internal import _get_environ
+from ._internal import _make_encode_wrapper
+from ._internal import _wsgi_decoding_dance
+from ._internal import _wsgi_encoding_dance
+from .datastructures import Authorization
+from .datastructures import CallbackDict
+from .datastructures import CombinedMultiDict
+from .datastructures import EnvironHeaders
+from .datastructures import FileMultiDict
+from .datastructures import Headers
+from .datastructures import MultiDict
+from .http import dump_cookie
+from .http import dump_options_header
+from .http import parse_options_header
+from .sansio.multipart import Data
+from .sansio.multipart import Epilogue
+from .sansio.multipart import Field
+from .sansio.multipart import File
+from .sansio.multipart import MultipartEncoder
+from .sansio.multipart import Preamble
+from .urls import iri_to_uri
+from .urls import url_encode
+from .urls import url_fix
+from .urls import url_parse
+from .urls import url_unparse
+from .urls import url_unquote
+from .utils import get_content_type
+from .wrappers.request import Request
+from .wrappers.response import Response
+from .wsgi import ClosingIterator
+from .wsgi import get_current_url
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+
+
+def stream_encode_multipart(
+    data: t.Mapping[str, t.Any],
+    use_tempfile: bool = True,
+    threshold: int = 1024 * 500,
+    boundary: t.Optional[str] = None,
+    charset: str = "utf-8",
+) -> t.Tuple[t.IO[bytes], int, str]:
+    """Encode a dict of values (either strings or file descriptors or
+    :class:`FileStorage` objects.) into a multipart encoded string stored
+    in a file descriptor.
+    """
+    if boundary is None:
+        boundary = f"---------------WerkzeugFormPart_{time()}{random()}"
+
+    stream: t.IO[bytes] = BytesIO()
+    total_length = 0
+    on_disk = False
+
+    if use_tempfile:
+
+        def write_binary(s: bytes) -> int:
+            nonlocal stream, total_length, on_disk
+
+            if on_disk:
+                return stream.write(s)
+            else:
+                length = len(s)
+
+                if length + total_length <= threshold:
+                    stream.write(s)
+                else:
+                    new_stream = t.cast(t.IO[bytes], TemporaryFile("wb+"))
+                    new_stream.write(stream.getvalue())  # type: ignore
+                    new_stream.write(s)
+                    stream = new_stream
+                    on_disk = True
+
+                total_length += length
+                return length
+
+    else:
+        write_binary = stream.write
+
+    encoder = MultipartEncoder(boundary.encode())
+    write_binary(encoder.send_event(Preamble(data=b"")))
+    for key, value in _iter_data(data):
+        reader = getattr(value, "read", None)
+        if reader is not None:
+            filename = getattr(value, "filename", getattr(value, "name", None))
+            content_type = getattr(value, "content_type", None)
+            if content_type is None:
+                content_type = (
+                    filename
+                    and mimetypes.guess_type(filename)[0]
+                    or "application/octet-stream"
+                )
+            headers = Headers([("Content-Type", content_type)])
+            if filename is None:
+                write_binary(encoder.send_event(Field(name=key, headers=headers)))
+            else:
+                write_binary(
+                    encoder.send_event(
+                        File(name=key, filename=filename, headers=headers)
+                    )
+                )
+            while True:
+                chunk = reader(16384)
+
+                if not chunk:
+                    break
+
+                write_binary(encoder.send_event(Data(data=chunk, more_data=True)))
+        else:
+            if not isinstance(value, str):
+                value = str(value)
+            write_binary(encoder.send_event(Field(name=key, headers=Headers())))
+            write_binary(
+                encoder.send_event(Data(data=value.encode(charset), more_data=False))
+            )
+
+    write_binary(encoder.send_event(Epilogue(data=b"")))
+
+    length = stream.tell()
+    stream.seek(0)
+    return stream, length, boundary
+
+
+def encode_multipart(
+    values: t.Mapping[str, t.Any],
+    boundary: t.Optional[str] = None,
+    charset: str = "utf-8",
+) -> t.Tuple[str, bytes]:
+    """Like `stream_encode_multipart` but returns a tuple in the form
+    (``boundary``, ``data``) where data is bytes.
+    """
+    stream, length, boundary = stream_encode_multipart(
+        values, use_tempfile=False, boundary=boundary, charset=charset
+    )
+    return boundary, stream.read()
+
+
+class _TestCookieHeaders:
+    """A headers adapter for cookielib"""
+
+    def __init__(self, headers: t.Union[Headers, t.List[t.Tuple[str, str]]]) -> None:
+        self.headers = headers
+
+    def getheaders(self, name: str) -> t.Iterable[str]:
+        headers = []
+        name = name.lower()
+        for k, v in self.headers:
+            if k.lower() == name:
+                headers.append(v)
+        return headers
+
+    def get_all(
+        self, name: str, default: t.Optional[t.Iterable[str]] = None
+    ) -> t.Iterable[str]:
+        headers = self.getheaders(name)
+
+        if not headers:
+            return default  # type: ignore
+
+        return headers
+
+
+class _TestCookieResponse:
+    """Something that looks like a httplib.HTTPResponse, but is actually just an
+    adapter for our test responses to make them available for cookielib.
+    """
+
+    def __init__(self, headers: t.Union[Headers, t.List[t.Tuple[str, str]]]) -> None:
+        self.headers = _TestCookieHeaders(headers)
+
+    def info(self) -> _TestCookieHeaders:
+        return self.headers
+
+
+class _TestCookieJar(CookieJar):
+    """A cookielib.CookieJar modified to inject and read cookie headers from
+    and to wsgi environments, and wsgi application responses.
+    """
+
+    def inject_wsgi(self, environ: "WSGIEnvironment") -> None:
+        """Inject the cookies as client headers into the server's wsgi
+        environment.
+        """
+        cvals = [f"{c.name}={c.value}" for c in self]
+
+        if cvals:
+            environ["HTTP_COOKIE"] = "; ".join(cvals)
+        else:
+            environ.pop("HTTP_COOKIE", None)
+
+    def extract_wsgi(
+        self,
+        environ: "WSGIEnvironment",
+        headers: t.Union[Headers, t.List[t.Tuple[str, str]]],
+    ) -> None:
+        """Extract the server's set-cookie headers as cookies into the
+        cookie jar.
+        """
+        self.extract_cookies(
+            _TestCookieResponse(headers),  # type: ignore
+            _UrllibRequest(get_current_url(environ)),
+        )
+
+
+def _iter_data(data: t.Mapping[str, t.Any]) -> t.Iterator[t.Tuple[str, t.Any]]:
+    """Iterate over a mapping that might have a list of values, yielding
+    all key, value pairs. Almost like iter_multi_items but only allows
+    lists, not tuples, of values so tuples can be used for files.
+    """
+    if isinstance(data, MultiDict):
+        yield from data.items(multi=True)
+    else:
+        for key, value in data.items():
+            if isinstance(value, list):
+                for v in value:
+                    yield key, v
+            else:
+                yield key, value
+
+
+_TAnyMultiDict = t.TypeVar("_TAnyMultiDict", bound=MultiDict)
+
+
+class EnvironBuilder:
+    """This class can be used to conveniently create a WSGI environment
+    for testing purposes.  It can be used to quickly create WSGI environments
+    or request objects from arbitrary data.
+
+    The signature of this class is also used in some other places as of
+    Werkzeug 0.5 (:func:`create_environ`, :meth:`Response.from_values`,
+    :meth:`Client.open`).  Because of this most of the functionality is
+    available through the constructor alone.
+
+    Files and regular form data can be manipulated independently of each
+    other with the :attr:`form` and :attr:`files` attributes, but are
+    passed with the same argument to the constructor: `data`.
+
+    `data` can be any of these values:
+
+    -   a `str` or `bytes` object: The object is converted into an
+        :attr:`input_stream`, the :attr:`content_length` is set and you have to
+        provide a :attr:`content_type`.
+    -   a `dict` or :class:`MultiDict`: The keys have to be strings. The values
+        have to be either any of the following objects, or a list of any of the
+        following objects:
+
+        -   a :class:`file`-like object:  These are converted into
+            :class:`FileStorage` objects automatically.
+        -   a `tuple`:  The :meth:`~FileMultiDict.add_file` method is called
+            with the key and the unpacked `tuple` items as positional
+            arguments.
+        -   a `str`:  The string is set as form data for the associated key.
+    -   a file-like object: The object content is loaded in memory and then
+        handled like a regular `str` or a `bytes`.
+
+    :param path: the path of the request.  In the WSGI environment this will
+                 end up as `PATH_INFO`.  If the `query_string` is not defined
+                 and there is a question mark in the `path` everything after
+                 it is used as query string.
+    :param base_url: the base URL is a URL that is used to extract the WSGI
+                     URL scheme, host (server name + server port) and the
+                     script root (`SCRIPT_NAME`).
+    :param query_string: an optional string or dict with URL parameters.
+    :param method: the HTTP method to use, defaults to `GET`.
+    :param input_stream: an optional input stream.  Do not specify this and
+                         `data`.  As soon as an input stream is set you can't
+                         modify :attr:`args` and :attr:`files` unless you
+                         set the :attr:`input_stream` to `None` again.
+    :param content_type: The content type for the request.  As of 0.5 you
+                         don't have to provide this when specifying files
+                         and form data via `data`.
+    :param content_length: The content length for the request.  You don't
+                           have to specify this when providing data via
+                           `data`.
+    :param errors_stream: an optional error stream that is used for
+                          `wsgi.errors`.  Defaults to :data:`stderr`.
+    :param multithread: controls `wsgi.multithread`.  Defaults to `False`.
+    :param multiprocess: controls `wsgi.multiprocess`.  Defaults to `False`.
+    :param run_once: controls `wsgi.run_once`.  Defaults to `False`.
+    :param headers: an optional list or :class:`Headers` object of headers.
+    :param data: a string or dict of form data or a file-object.
+                 See explanation above.
+    :param json: An object to be serialized and assigned to ``data``.
+        Defaults the content type to ``"application/json"``.
+        Serialized with the function assigned to :attr:`json_dumps`.
+    :param environ_base: an optional dict of environment defaults.
+    :param environ_overrides: an optional dict of environment overrides.
+    :param charset: the charset used to encode string data.
+    :param auth: An authorization object to use for the
+        ``Authorization`` header value. A ``(username, password)`` tuple
+        is a shortcut for ``Basic`` authorization.
+
+    .. versionchanged:: 2.0
+        ``REQUEST_URI`` and ``RAW_URI`` is the full raw URI including
+        the query string, not only the path.
+
+    .. versionchanged:: 2.0
+        The default :attr:`request_class` is ``Request`` instead of
+        ``BaseRequest``.
+
+    .. versionadded:: 2.0
+       Added the ``auth`` parameter.
+
+    .. versionadded:: 0.15
+        The ``json`` param and :meth:`json_dumps` method.
+
+    .. versionadded:: 0.15
+        The environ has keys ``REQUEST_URI`` and ``RAW_URI`` containing
+        the path before perecent-decoding. This is not part of the WSGI
+        PEP, but many WSGI servers include it.
+
+    .. versionchanged:: 0.6
+       ``path`` and ``base_url`` can now be unicode strings that are
+       encoded with :func:`iri_to_uri`.
+    """
+
+    #: the server protocol to use.  defaults to HTTP/1.1
+    server_protocol = "HTTP/1.1"
+
+    #: the wsgi version to use.  defaults to (1, 0)
+    wsgi_version = (1, 0)
+
+    #: The default request class used by :meth:`get_request`.
+    request_class = Request
+
+    import json
+
+    #: The serialization function used when ``json`` is passed.
+    json_dumps = staticmethod(json.dumps)
+    del json
+
+    _args: t.Optional[MultiDict]
+    _query_string: t.Optional[str]
+    _input_stream: t.Optional[t.IO[bytes]]
+    _form: t.Optional[MultiDict]
+    _files: t.Optional[FileMultiDict]
+
+    def __init__(
+        self,
+        path: str = "/",
+        base_url: t.Optional[str] = None,
+        query_string: t.Optional[t.Union[t.Mapping[str, str], str]] = None,
+        method: str = "GET",
+        input_stream: t.Optional[t.IO[bytes]] = None,
+        content_type: t.Optional[str] = None,
+        content_length: t.Optional[int] = None,
+        errors_stream: t.Optional[t.IO[str]] = None,
+        multithread: bool = False,
+        multiprocess: bool = False,
+        run_once: bool = False,
+        headers: t.Optional[t.Union[Headers, t.Iterable[t.Tuple[str, str]]]] = None,
+        data: t.Optional[
+            t.Union[t.IO[bytes], str, bytes, t.Mapping[str, t.Any]]
+        ] = None,
+        environ_base: t.Optional[t.Mapping[str, t.Any]] = None,
+        environ_overrides: t.Optional[t.Mapping[str, t.Any]] = None,
+        charset: str = "utf-8",
+        mimetype: t.Optional[str] = None,
+        json: t.Optional[t.Mapping[str, t.Any]] = None,
+        auth: t.Optional[t.Union[Authorization, t.Tuple[str, str]]] = None,
+    ) -> None:
+        path_s = _make_encode_wrapper(path)
+        if query_string is not None and path_s("?") in path:
+            raise ValueError("Query string is defined in the path and as an argument")
+        request_uri = url_parse(path)
+        if query_string is None and path_s("?") in path:
+            query_string = request_uri.query
+        self.charset = charset
+        self.path = iri_to_uri(request_uri.path)
+        self.request_uri = path
+        if base_url is not None:
+            base_url = url_fix(iri_to_uri(base_url, charset), charset)
+        self.base_url = base_url  # type: ignore
+        if isinstance(query_string, (bytes, str)):
+            self.query_string = query_string
+        else:
+            if query_string is None:
+                query_string = MultiDict()
+            elif not isinstance(query_string, MultiDict):
+                query_string = MultiDict(query_string)
+            self.args = query_string
+        self.method = method
+        if headers is None:
+            headers = Headers()
+        elif not isinstance(headers, Headers):
+            headers = Headers(headers)
+        self.headers = headers
+        if content_type is not None:
+            self.content_type = content_type
+        if errors_stream is None:
+            errors_stream = sys.stderr
+        self.errors_stream = errors_stream
+        self.multithread = multithread
+        self.multiprocess = multiprocess
+        self.run_once = run_once
+        self.environ_base = environ_base
+        self.environ_overrides = environ_overrides
+        self.input_stream = input_stream
+        self.content_length = content_length
+        self.closed = False
+
+        if auth is not None:
+            if isinstance(auth, tuple):
+                auth = Authorization(
+                    "basic", {"username": auth[0], "password": auth[1]}
+                )
+
+            self.headers.set("Authorization", auth.to_header())
+
+        if json is not None:
+            if data is not None:
+                raise TypeError("can't provide both json and data")
+
+            data = self.json_dumps(json)
+
+            if self.content_type is None:
+                self.content_type = "application/json"
+
+        if data:
+            if input_stream is not None:
+                raise TypeError("can't provide input stream and data")
+            if hasattr(data, "read"):
+                data = data.read()  # type: ignore
+            if isinstance(data, str):
+                data = data.encode(self.charset)
+            if isinstance(data, bytes):
+                self.input_stream = BytesIO(data)
+                if self.content_length is None:
+                    self.content_length = len(data)
+            else:
+                for key, value in _iter_data(data):  # type: ignore
+                    if isinstance(value, (tuple, dict)) or hasattr(value, "read"):
+                        self._add_file_from_data(key, value)
+                    else:
+                        self.form.setlistdefault(key).append(value)
+
+        if mimetype is not None:
+            self.mimetype = mimetype
+
+    @classmethod
+    def from_environ(
+        cls, environ: "WSGIEnvironment", **kwargs: t.Any
+    ) -> "EnvironBuilder":
+        """Turn an environ dict back into a builder. Any extra kwargs
+        override the args extracted from the environ.
+
+        .. versionchanged:: 2.0
+            Path and query values are passed through the WSGI decoding
+            dance to avoid double encoding.
+
+        .. versionadded:: 0.15
+        """
+        headers = Headers(EnvironHeaders(environ))
+        out = {
+            "path": _wsgi_decoding_dance(environ["PATH_INFO"]),
+            "base_url": cls._make_base_url(
+                environ["wsgi.url_scheme"],
+                headers.pop("Host"),
+                _wsgi_decoding_dance(environ["SCRIPT_NAME"]),
+            ),
+            "query_string": _wsgi_decoding_dance(environ["QUERY_STRING"]),
+            "method": environ["REQUEST_METHOD"],
+            "input_stream": environ["wsgi.input"],
+            "content_type": headers.pop("Content-Type", None),
+            "content_length": headers.pop("Content-Length", None),
+            "errors_stream": environ["wsgi.errors"],
+            "multithread": environ["wsgi.multithread"],
+            "multiprocess": environ["wsgi.multiprocess"],
+            "run_once": environ["wsgi.run_once"],
+            "headers": headers,
+        }
+        out.update(kwargs)
+        return cls(**out)
+
+    def _add_file_from_data(
+        self,
+        key: str,
+        value: t.Union[
+            t.IO[bytes], t.Tuple[t.IO[bytes], str], t.Tuple[t.IO[bytes], str, str]
+        ],
+    ) -> None:
+        """Called in the EnvironBuilder to add files from the data dict."""
+        if isinstance(value, tuple):
+            self.files.add_file(key, *value)
+        else:
+            self.files.add_file(key, value)
+
+    @staticmethod
+    def _make_base_url(scheme: str, host: str, script_root: str) -> str:
+        return url_unparse((scheme, host, script_root, "", "")).rstrip("/") + "/"
+
+    @property
+    def base_url(self) -> str:
+        """The base URL is used to extract the URL scheme, host name,
+        port, and root path.
+        """
+        return self._make_base_url(self.url_scheme, self.host, self.script_root)
+
+    @base_url.setter
+    def base_url(self, value: t.Optional[str]) -> None:
+        if value is None:
+            scheme = "http"
+            netloc = "localhost"
+            script_root = ""
+        else:
+            scheme, netloc, script_root, qs, anchor = url_parse(value)
+            if qs or anchor:
+                raise ValueError("base url must not contain a query string or fragment")
+        self.script_root = script_root.rstrip("/")
+        self.host = netloc
+        self.url_scheme = scheme
+
+    @property
+    def content_type(self) -> t.Optional[str]:
+        """The content type for the request.  Reflected from and to
+        the :attr:`headers`.  Do not set if you set :attr:`files` or
+        :attr:`form` for auto detection.
+        """
+        ct = self.headers.get("Content-Type")
+        if ct is None and not self._input_stream:
+            if self._files:
+                return "multipart/form-data"
+            if self._form:
+                return "application/x-www-form-urlencoded"
+            return None
+        return ct
+
+    @content_type.setter
+    def content_type(self, value: t.Optional[str]) -> None:
+        if value is None:
+            self.headers.pop("Content-Type", None)
+        else:
+            self.headers["Content-Type"] = value
+
+    @property
+    def mimetype(self) -> t.Optional[str]:
+        """The mimetype (content type without charset etc.)
+
+        .. versionadded:: 0.14
+        """
+        ct = self.content_type
+        return ct.split(";")[0].strip() if ct else None
+
+    @mimetype.setter
+    def mimetype(self, value: str) -> None:
+        self.content_type = get_content_type(value, self.charset)
+
+    @property
+    def mimetype_params(self) -> t.Mapping[str, str]:
+        """The mimetype parameters as dict.  For example if the
+        content type is ``text/html; charset=utf-8`` the params would be
+        ``{'charset': 'utf-8'}``.
+
+        .. versionadded:: 0.14
+        """
+
+        def on_update(d: CallbackDict) -> None:
+            self.headers["Content-Type"] = dump_options_header(self.mimetype, d)
+
+        d = parse_options_header(self.headers.get("content-type", ""))[1]
+        return CallbackDict(d, on_update)
+
+    @property
+    def content_length(self) -> t.Optional[int]:
+        """The content length as integer.  Reflected from and to the
+        :attr:`headers`.  Do not set if you set :attr:`files` or
+        :attr:`form` for auto detection.
+        """
+        return self.headers.get("Content-Length", type=int)
+
+    @content_length.setter
+    def content_length(self, value: t.Optional[int]) -> None:
+        if value is None:
+            self.headers.pop("Content-Length", None)
+        else:
+            self.headers["Content-Length"] = str(value)
+
+    def _get_form(self, name: str, storage: t.Type[_TAnyMultiDict]) -> _TAnyMultiDict:
+        """Common behavior for getting the :attr:`form` and
+        :attr:`files` properties.
+
+        :param name: Name of the internal cached attribute.
+        :param storage: Storage class used for the data.
+        """
+        if self.input_stream is not None:
+            raise AttributeError("an input stream is defined")
+
+        rv = getattr(self, name)
+
+        if rv is None:
+            rv = storage()
+            setattr(self, name, rv)
+
+        return rv  # type: ignore
+
+    def _set_form(self, name: str, value: MultiDict) -> None:
+        """Common behavior for setting the :attr:`form` and
+        :attr:`files` properties.
+
+        :param name: Name of the internal cached attribute.
+        :param value: Value to assign to the attribute.
+        """
+        self._input_stream = None
+        setattr(self, name, value)
+
+    @property
+    def form(self) -> MultiDict:
+        """A :class:`MultiDict` of form values."""
+        return self._get_form("_form", MultiDict)
+
+    @form.setter
+    def form(self, value: MultiDict) -> None:
+        self._set_form("_form", value)
+
+    @property
+    def files(self) -> FileMultiDict:
+        """A :class:`FileMultiDict` of uploaded files. Use
+        :meth:`~FileMultiDict.add_file` to add new files.
+        """
+        return self._get_form("_files", FileMultiDict)
+
+    @files.setter
+    def files(self, value: FileMultiDict) -> None:
+        self._set_form("_files", value)
+
+    @property
+    def input_stream(self) -> t.Optional[t.IO[bytes]]:
+        """An optional input stream. This is mutually exclusive with
+        setting :attr:`form` and :attr:`files`, setting it will clear
+        those. Do not provide this if the method is not ``POST`` or
+        another method that has a body.
+        """
+        return self._input_stream
+
+    @input_stream.setter
+    def input_stream(self, value: t.Optional[t.IO[bytes]]) -> None:
+        self._input_stream = value
+        self._form = None
+        self._files = None
+
+    @property
+    def query_string(self) -> str:
+        """The query string.  If you set this to a string
+        :attr:`args` will no longer be available.
+        """
+        if self._query_string is None:
+            if self._args is not None:
+                return url_encode(self._args, charset=self.charset)
+            return ""
+        return self._query_string
+
+    @query_string.setter
+    def query_string(self, value: t.Optional[str]) -> None:
+        self._query_string = value
+        self._args = None
+
+    @property
+    def args(self) -> MultiDict:
+        """The URL arguments as :class:`MultiDict`."""
+        if self._query_string is not None:
+            raise AttributeError("a query string is defined")
+        if self._args is None:
+            self._args = MultiDict()
+        return self._args
+
+    @args.setter
+    def args(self, value: t.Optional[MultiDict]) -> None:
+        self._query_string = None
+        self._args = value
+
+    @property
+    def server_name(self) -> str:
+        """The server name (read-only, use :attr:`host` to set)"""
+        return self.host.split(":", 1)[0]
+
+    @property
+    def server_port(self) -> int:
+        """The server port as integer (read-only, use :attr:`host` to set)"""
+        pieces = self.host.split(":", 1)
+        if len(pieces) == 2 and pieces[1].isdigit():
+            return int(pieces[1])
+        if self.url_scheme == "https":
+            return 443
+        return 80
+
+    def __del__(self) -> None:
+        try:
+            self.close()
+        except Exception:
+            pass
+
+    def close(self) -> None:
+        """Closes all files.  If you put real :class:`file` objects into the
+        :attr:`files` dict you can call this method to automatically close
+        them all in one go.
+        """
+        if self.closed:
+            return
+        try:
+            files = self.files.values()
+        except AttributeError:
+            files = ()  # type: ignore
+        for f in files:
+            try:
+                f.close()
+            except Exception:
+                pass
+        self.closed = True
+
+    def get_environ(self) -> "WSGIEnvironment":
+        """Return the built environ.
+
+        .. versionchanged:: 0.15
+            The content type and length headers are set based on
+            input stream detection. Previously this only set the WSGI
+            keys.
+        """
+        input_stream = self.input_stream
+        content_length = self.content_length
+
+        mimetype = self.mimetype
+        content_type = self.content_type
+
+        if input_stream is not None:
+            start_pos = input_stream.tell()
+            input_stream.seek(0, 2)
+            end_pos = input_stream.tell()
+            input_stream.seek(start_pos)
+            content_length = end_pos - start_pos
+        elif mimetype == "multipart/form-data":
+            input_stream, content_length, boundary = stream_encode_multipart(
+                CombinedMultiDict([self.form, self.files]), charset=self.charset
+            )
+            content_type = f'{mimetype}; boundary="{boundary}"'
+        elif mimetype == "application/x-www-form-urlencoded":
+            form_encoded = url_encode(self.form, charset=self.charset).encode("ascii")
+            content_length = len(form_encoded)
+            input_stream = BytesIO(form_encoded)
+        else:
+            input_stream = BytesIO()
+
+        result: "WSGIEnvironment" = {}
+        if self.environ_base:
+            result.update(self.environ_base)
+
+        def _path_encode(x: str) -> str:
+            return _wsgi_encoding_dance(url_unquote(x, self.charset), self.charset)
+
+        raw_uri = _wsgi_encoding_dance(self.request_uri, self.charset)
+        result.update(
+            {
+                "REQUEST_METHOD": self.method,
+                "SCRIPT_NAME": _path_encode(self.script_root),
+                "PATH_INFO": _path_encode(self.path),
+                "QUERY_STRING": _wsgi_encoding_dance(self.query_string, self.charset),
+                # Non-standard, added by mod_wsgi, uWSGI
+                "REQUEST_URI": raw_uri,
+                # Non-standard, added by gunicorn
+                "RAW_URI": raw_uri,
+                "SERVER_NAME": self.server_name,
+                "SERVER_PORT": str(self.server_port),
+                "HTTP_HOST": self.host,
+                "SERVER_PROTOCOL": self.server_protocol,
+                "wsgi.version": self.wsgi_version,
+                "wsgi.url_scheme": self.url_scheme,
+                "wsgi.input": input_stream,
+                "wsgi.errors": self.errors_stream,
+                "wsgi.multithread": self.multithread,
+                "wsgi.multiprocess": self.multiprocess,
+                "wsgi.run_once": self.run_once,
+            }
+        )
+
+        headers = self.headers.copy()
+
+        if content_type is not None:
+            result["CONTENT_TYPE"] = content_type
+            headers.set("Content-Type", content_type)
+
+        if content_length is not None:
+            result["CONTENT_LENGTH"] = str(content_length)
+            headers.set("Content-Length", content_length)
+
+        combined_headers = defaultdict(list)
+
+        for key, value in headers.to_wsgi_list():
+            combined_headers[f"HTTP_{key.upper().replace('-', '_')}"].append(value)
+
+        for key, values in combined_headers.items():
+            result[key] = ", ".join(values)
+
+        if self.environ_overrides:
+            result.update(self.environ_overrides)
+
+        return result
+
+    def get_request(self, cls: t.Optional[t.Type[Request]] = None) -> Request:
+        """Returns a request with the data.  If the request class is not
+        specified :attr:`request_class` is used.
+
+        :param cls: The request wrapper to use.
+        """
+        if cls is None:
+            cls = self.request_class
+
+        return cls(self.get_environ())
+
+
+class ClientRedirectError(Exception):
+    """If a redirect loop is detected when using follow_redirects=True with
+    the :cls:`Client`, then this exception is raised.
+    """
+
+
+class Client:
+    """This class allows you to send requests to a wrapped application.
+
+    The use_cookies parameter indicates whether cookies should be stored and
+    sent for subsequent requests. This is True by default, but passing False
+    will disable this behaviour.
+
+    If you want to request some subdomain of your application you may set
+    `allow_subdomain_redirects` to `True` as if not no external redirects
+    are allowed.
+
+    .. versionchanged:: 2.0
+        ``response_wrapper`` is always a subclass of
+        :class:``TestResponse``.
+
+    .. versionchanged:: 0.5
+        Added the ``use_cookies`` parameter.
+    """
+
+    def __init__(
+        self,
+        application: "WSGIApplication",
+        response_wrapper: t.Optional[t.Type["Response"]] = None,
+        use_cookies: bool = True,
+        allow_subdomain_redirects: bool = False,
+    ) -> None:
+        self.application = application
+
+        if response_wrapper in {None, Response}:
+            response_wrapper = TestResponse
+        elif not isinstance(response_wrapper, TestResponse):
+            response_wrapper = type(
+                "WrapperTestResponse",
+                (TestResponse, response_wrapper),  # type: ignore
+                {},
+            )
+
+        self.response_wrapper = t.cast(t.Type["TestResponse"], response_wrapper)
+
+        if use_cookies:
+            self.cookie_jar: t.Optional[_TestCookieJar] = _TestCookieJar()
+        else:
+            self.cookie_jar = None
+
+        self.allow_subdomain_redirects = allow_subdomain_redirects
+
+    def set_cookie(
+        self,
+        server_name: str,
+        key: str,
+        value: str = "",
+        max_age: t.Optional[t.Union[timedelta, int]] = None,
+        expires: t.Optional[t.Union[str, datetime, int, float]] = None,
+        path: str = "/",
+        domain: t.Optional[str] = None,
+        secure: bool = False,
+        httponly: bool = False,
+        samesite: t.Optional[str] = None,
+        charset: str = "utf-8",
+    ) -> None:
+        """Sets a cookie in the client's cookie jar.  The server name
+        is required and has to match the one that is also passed to
+        the open call.
+        """
+        assert self.cookie_jar is not None, "cookies disabled"
+        header = dump_cookie(
+            key,
+            value,
+            max_age,
+            expires,
+            path,
+            domain,
+            secure,
+            httponly,
+            charset,
+            samesite=samesite,
+        )
+        environ = create_environ(path, base_url=f"http://{server_name}")
+        headers = [("Set-Cookie", header)]
+        self.cookie_jar.extract_wsgi(environ, headers)
+
+    def delete_cookie(
+        self,
+        server_name: str,
+        key: str,
+        path: str = "/",
+        domain: t.Optional[str] = None,
+        secure: bool = False,
+        httponly: bool = False,
+        samesite: t.Optional[str] = None,
+    ) -> None:
+        """Deletes a cookie in the test client."""
+        self.set_cookie(
+            server_name,
+            key,
+            expires=0,
+            max_age=0,
+            path=path,
+            domain=domain,
+            secure=secure,
+            httponly=httponly,
+            samesite=samesite,
+        )
+
+    def run_wsgi_app(
+        self, environ: "WSGIEnvironment", buffered: bool = False
+    ) -> t.Tuple[t.Iterable[bytes], str, Headers]:
+        """Runs the wrapped WSGI app with the given environment.
+
+        :meta private:
+        """
+        if self.cookie_jar is not None:
+            self.cookie_jar.inject_wsgi(environ)
+
+        rv = run_wsgi_app(self.application, environ, buffered=buffered)
+
+        if self.cookie_jar is not None:
+            self.cookie_jar.extract_wsgi(environ, rv[2])
+
+        return rv
+
+    def resolve_redirect(
+        self, response: "TestResponse", buffered: bool = False
+    ) -> "TestResponse":
+        """Perform a new request to the location given by the redirect
+        response to the previous request.
+
+        :meta private:
+        """
+        scheme, netloc, path, qs, anchor = url_parse(response.location)
+        builder = EnvironBuilder.from_environ(response.request.environ, query_string=qs)
+
+        to_name_parts = netloc.split(":", 1)[0].split(".")
+        from_name_parts = builder.server_name.split(".")
+
+        if to_name_parts != [""]:
+            # The new location has a host, use it for the base URL.
+            builder.url_scheme = scheme
+            builder.host = netloc
+        else:
+            # A local redirect with autocorrect_location_header=False
+            # doesn't have a host, so use the request's host.
+            to_name_parts = from_name_parts
+
+        # Explain why a redirect to a different server name won't be followed.
+        if to_name_parts != from_name_parts:
+            if to_name_parts[-len(from_name_parts) :] == from_name_parts:
+                if not self.allow_subdomain_redirects:
+                    raise RuntimeError("Following subdomain redirects is not enabled.")
+            else:
+                raise RuntimeError("Following external redirects is not supported.")
+
+        path_parts = path.split("/")
+        root_parts = builder.script_root.split("/")
+
+        if path_parts[: len(root_parts)] == root_parts:
+            # Strip the script root from the path.
+            builder.path = path[len(builder.script_root) :]
+        else:
+            # The new location is not under the script root, so use the
+            # whole path and clear the previous root.
+            builder.path = path
+            builder.script_root = ""
+
+        # Only 307 and 308 preserve all of the original request.
+        if response.status_code not in {307, 308}:
+            # HEAD is preserved, everything else becomes GET.
+            if builder.method != "HEAD":
+                builder.method = "GET"
+
+            # Clear the body and the headers that describe it.
+
+            if builder.input_stream is not None:
+                builder.input_stream.close()
+                builder.input_stream = None
+
+            builder.content_type = None
+            builder.content_length = None
+            builder.headers.pop("Transfer-Encoding", None)
+
+        return self.open(builder, buffered=buffered)
+
+    def open(
+        self,
+        *args: t.Any,
+        as_tuple: bool = False,
+        buffered: bool = False,
+        follow_redirects: bool = False,
+        **kwargs: t.Any,
+    ) -> "TestResponse":
+        """Generate an environ dict from the given arguments, make a
+        request to the application using it, and return the response.
+
+        :param args: Passed to :class:`EnvironBuilder` to create the
+            environ for the request. If a single arg is passed, it can
+            be an existing :class:`EnvironBuilder` or an environ dict.
+        :param buffered: Convert the iterator returned by the app into
+            a list. If the iterator has a ``close()`` method, it is
+            called automatically.
+        :param follow_redirects: Make additional requests to follow HTTP
+            redirects until a non-redirect status is returned.
+            :attr:`TestResponse.history` lists the intermediate
+            responses.
+
+        .. versionchanged:: 2.0
+            ``as_tuple`` is deprecated and will be removed in Werkzeug
+            2.1. Use :attr:`TestResponse.request` and
+            ``request.environ`` instead.
+
+        .. versionchanged:: 2.0
+            The request input stream is closed when calling
+            ``response.close()``. Input streams for redirects are
+            automatically closed.
+
+        .. versionchanged:: 0.5
+            If a dict is provided as file in the dict for the ``data``
+            parameter the content type has to be called ``content_type``
+            instead of ``mimetype``. This change was made for
+            consistency with :class:`werkzeug.FileWrapper`.
+
+        .. versionchanged:: 0.5
+            Added the ``follow_redirects`` parameter.
+        """
+        request: t.Optional["Request"] = None
+
+        if not kwargs and len(args) == 1:
+            arg = args[0]
+
+            if isinstance(arg, EnvironBuilder):
+                request = arg.get_request()
+            elif isinstance(arg, dict):
+                request = EnvironBuilder.from_environ(arg).get_request()
+            elif isinstance(arg, Request):
+                request = arg
+
+        if request is None:
+            builder = EnvironBuilder(*args, **kwargs)
+
+            try:
+                request = builder.get_request()
+            finally:
+                builder.close()
+
+        response = self.run_wsgi_app(request.environ, buffered=buffered)
+        response = self.response_wrapper(*response, request=request)
+
+        redirects = set()
+        history: t.List["TestResponse"] = []
+
+        while follow_redirects and response.status_code in {
+            301,
+            302,
+            303,
+            305,
+            307,
+            308,
+        }:
+            # Exhaust intermediate response bodies to ensure middleware
+            # that returns an iterator runs any cleanup code.
+            if not buffered:
+                response.make_sequence()
+                response.close()
+
+            new_redirect_entry = (response.location, response.status_code)
+
+            if new_redirect_entry in redirects:
+                raise ClientRedirectError(
+                    f"Loop detected: A {response.status_code} redirect"
+                    f" to {response.location} was already made."
+                )
+
+            redirects.add(new_redirect_entry)
+            response.history = tuple(history)
+            history.append(response)
+            response = self.resolve_redirect(response, buffered=buffered)
+        else:
+            # This is the final request after redirects, or not
+            # following redirects.
+            response.history = tuple(history)
+            # Close the input stream when closing the response, in case
+            # the input is an open temporary file.
+            response.call_on_close(request.input_stream.close)
+
+        if as_tuple:
+            warnings.warn(
+                "'as_tuple' is deprecated and will be removed in"
+                " Werkzeug 2.1. Access 'response.request.environ'"
+                " instead.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+            return request.environ, response  # type: ignore
+
+        return response
+
+    def get(self, *args: t.Any, **kw: t.Any) -> "TestResponse":
+        """Call :meth:`open` with ``method`` set to ``GET``."""
+        kw["method"] = "GET"
+        return self.open(*args, **kw)
+
+    def post(self, *args: t.Any, **kw: t.Any) -> "TestResponse":
+        """Call :meth:`open` with ``method`` set to ``POST``."""
+        kw["method"] = "POST"
+        return self.open(*args, **kw)
+
+    def put(self, *args: t.Any, **kw: t.Any) -> "TestResponse":
+        """Call :meth:`open` with ``method`` set to ``PUT``."""
+        kw["method"] = "PUT"
+        return self.open(*args, **kw)
+
+    def delete(self, *args: t.Any, **kw: t.Any) -> "TestResponse":
+        """Call :meth:`open` with ``method`` set to ``DELETE``."""
+        kw["method"] = "DELETE"
+        return self.open(*args, **kw)
+
+    def patch(self, *args: t.Any, **kw: t.Any) -> "TestResponse":
+        """Call :meth:`open` with ``method`` set to ``PATCH``."""
+        kw["method"] = "PATCH"
+        return self.open(*args, **kw)
+
+    def options(self, *args: t.Any, **kw: t.Any) -> "TestResponse":
+        """Call :meth:`open` with ``method`` set to ``OPTIONS``."""
+        kw["method"] = "OPTIONS"
+        return self.open(*args, **kw)
+
+    def head(self, *args: t.Any, **kw: t.Any) -> "TestResponse":
+        """Call :meth:`open` with ``method`` set to ``HEAD``."""
+        kw["method"] = "HEAD"
+        return self.open(*args, **kw)
+
+    def trace(self, *args: t.Any, **kw: t.Any) -> "TestResponse":
+        """Call :meth:`open` with ``method`` set to ``TRACE``."""
+        kw["method"] = "TRACE"
+        return self.open(*args, **kw)
+
+    def __repr__(self) -> str:
+        return f"<{type(self).__name__} {self.application!r}>"
+
+
+def create_environ(*args: t.Any, **kwargs: t.Any) -> "WSGIEnvironment":
+    """Create a new WSGI environ dict based on the values passed.  The first
+    parameter should be the path of the request which defaults to '/'.  The
+    second one can either be an absolute path (in that case the host is
+    localhost:80) or a full path to the request with scheme, netloc port and
+    the path to the script.
+
+    This accepts the same arguments as the :class:`EnvironBuilder`
+    constructor.
+
+    .. versionchanged:: 0.5
+       This function is now a thin wrapper over :class:`EnvironBuilder` which
+       was added in 0.5.  The `headers`, `environ_base`, `environ_overrides`
+       and `charset` parameters were added.
+    """
+    builder = EnvironBuilder(*args, **kwargs)
+
+    try:
+        return builder.get_environ()
+    finally:
+        builder.close()
+
+
+def run_wsgi_app(
+    app: "WSGIApplication", environ: "WSGIEnvironment", buffered: bool = False
+) -> t.Tuple[t.Iterable[bytes], str, Headers]:
+    """Return a tuple in the form (app_iter, status, headers) of the
+    application output.  This works best if you pass it an application that
+    returns an iterator all the time.
+
+    Sometimes applications may use the `write()` callable returned
+    by the `start_response` function.  This tries to resolve such edge
+    cases automatically.  But if you don't get the expected output you
+    should set `buffered` to `True` which enforces buffering.
+
+    If passed an invalid WSGI application the behavior of this function is
+    undefined.  Never pass non-conforming WSGI applications to this function.
+
+    :param app: the application to execute.
+    :param buffered: set to `True` to enforce buffering.
+    :return: tuple in the form ``(app_iter, status, headers)``
+    """
+    # Copy environ to ensure any mutations by the app (ProxyFix, for
+    # example) don't affect subsequent requests (such as redirects).
+    environ = _get_environ(environ).copy()
+    status: str
+    response: t.Optional[t.Tuple[str, t.List[t.Tuple[str, str]]]] = None
+    buffer: t.List[bytes] = []
+
+    def start_response(status, headers, exc_info=None):  # type: ignore
+        nonlocal response
+
+        if exc_info:
+            try:
+                raise exc_info[1].with_traceback(exc_info[2])
+            finally:
+                exc_info = None
+
+        response = (status, headers)
+        return buffer.append
+
+    app_rv = app(environ, start_response)
+    close_func = getattr(app_rv, "close", None)
+    app_iter: t.Iterable[bytes] = iter(app_rv)
+
+    # when buffering we emit the close call early and convert the
+    # application iterator into a regular list
+    if buffered:
+        try:
+            app_iter = list(app_iter)
+        finally:
+            if close_func is not None:
+                close_func()
+
+    # otherwise we iterate the application iter until we have a response, chain
+    # the already received data with the already collected data and wrap it in
+    # a new `ClosingIterator` if we need to restore a `close` callable from the
+    # original return value.
+    else:
+        for item in app_iter:
+            buffer.append(item)
+
+            if response is not None:
+                break
+
+        if buffer:
+            app_iter = chain(buffer, app_iter)
+
+        if close_func is not None and app_iter is not app_rv:
+            app_iter = ClosingIterator(app_iter, close_func)
+
+    status, headers = response  # type: ignore
+    return app_iter, status, Headers(headers)
+
+
+class TestResponse(Response):
+    """:class:`~werkzeug.wrappers.Response` subclass that provides extra
+    information about requests made with the test :class:`Client`.
+
+    Test client requests will always return an instance of this class.
+    If a custom response class is passed to the client, it is
+    subclassed along with this to support test information.
+
+    If the test request included large files, or if the application is
+    serving a file, call :meth:`close` to close any open files and
+    prevent Python showing a ``ResourceWarning``.
+    """
+
+    request: Request
+    """A request object with the environ used to make the request that
+    resulted in this response.
+    """
+
+    history: t.Tuple["TestResponse", ...]
+    """A list of intermediate responses. Populated when the test request
+    is made with ``follow_redirects`` enabled.
+    """
+
+    def __init__(
+        self,
+        response: t.Iterable[bytes],
+        status: str,
+        headers: Headers,
+        request: Request,
+        history: t.Tuple["TestResponse"] = (),  # type: ignore
+        **kwargs: t.Any,
+    ) -> None:
+        super().__init__(response, status, headers, **kwargs)
+        self.request = request
+        self.history = history
+        self._compat_tuple = response, status, headers
+
+    def __iter__(self) -> t.Iterator:
+        warnings.warn(
+            (
+                "The test client no longer returns a tuple, it returns"
+                " a 'TestResponse'. Tuple unpacking is deprecated and"
+                " will be removed in Werkzeug 2.1. Access the"
+                " attributes 'data', 'status', and 'headers' instead."
+            ),
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return iter(self._compat_tuple)
+
+    def __getitem__(self, item: int) -> t.Any:
+        warnings.warn(
+            (
+                "The test client no longer returns a tuple, it returns"
+                " a 'TestResponse'. Item indexing is deprecated and"
+                " will be removed in Werkzeug 2.1. Access the"
+                " attributes 'data', 'status', and 'headers' instead."
+            ),
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return self._compat_tuple[item]
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/testapp.py b/.venv/lib/python3.6/site-packages/werkzeug/testapp.py
new file mode 100644
index 0000000..981f887
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/testapp.py
@@ -0,0 +1,240 @@
+"""A small application that can be used to test a WSGI server and check
+it for WSGI compliance.
+"""
+import base64
+import os
+import sys
+import typing as t
+from html import escape
+from textwrap import wrap
+
+from . import __version__ as _werkzeug_version
+from .wrappers.request import Request
+from .wrappers.response import Response
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import StartResponse
+    from _typeshed.wsgi import WSGIEnvironment
+
+
+logo = Response(
+    base64.b64decode(
+        """
+R0lGODlhoACgAOMIAAEDACwpAEpCAGdgAJaKAM28AOnVAP3rAP/////////
+//////////////////////yH5BAEKAAgALAAAAACgAKAAAAT+EMlJq704680R+F0ojmRpnuj0rWnrv
+nB8rbRs33gu0bzu/0AObxgsGn3D5HHJbCUFyqZ0ukkSDlAidctNFg7gbI9LZlrBaHGtzAae0eloe25
+7w9EDOX2fst/xenyCIn5/gFqDiVVDV4aGeYiKkhSFjnCQY5OTlZaXgZp8nJ2ekaB0SQOjqphrpnOiq
+ncEn65UsLGytLVmQ6m4sQazpbtLqL/HwpnER8bHyLrLOc3Oz8PRONPU1crXN9na263dMt/g4SzjMeX
+m5yDpLqgG7OzJ4u8lT/P69ej3JPn69kHzN2OIAHkB9RUYSFCFQYQJFTIkCDBiwoXWGnowaLEjRm7+G
+p9A7Hhx4rUkAUaSLJlxHMqVMD/aSycSZkyTplCqtGnRAM5NQ1Ly5OmzZc6gO4d6DGAUKA+hSocWYAo
+SlM6oUWX2O/o0KdaVU5vuSQLAa0ADwQgMEMB2AIECZhVSnTno6spgbtXmHcBUrQACcc2FrTrWS8wAf
+78cMFBgwIBgbN+qvTt3ayikRBk7BoyGAGABAdYyfdzRQGV3l4coxrqQ84GpUBmrdR3xNIDUPAKDBSA
+ADIGDhhqTZIWaDcrVX8EsbNzbkvCOxG8bN5w8ly9H8jyTJHC6DFndQydbguh2e/ctZJFXRxMAqqPVA
+tQH5E64SPr1f0zz7sQYjAHg0In+JQ11+N2B0XXBeeYZgBZFx4tqBToiTCPv0YBgQv8JqA6BEf6RhXx
+w1ENhRBnWV8ctEX4Ul2zc3aVGcQNC2KElyTDYyYUWvShdjDyMOGMuFjqnII45aogPhz/CodUHFwaDx
+lTgsaOjNyhGWJQd+lFoAGk8ObghI0kawg+EV5blH3dr+digkYuAGSaQZFHFz2P/cTaLmhF52QeSb45
+Jwxd+uSVGHlqOZpOeJpCFZ5J+rkAkFjQ0N1tah7JJSZUFNsrkeJUJMIBi8jyaEKIhKPomnC91Uo+NB
+yyaJ5umnnpInIFh4t6ZSpGaAVmizqjpByDegYl8tPE0phCYrhcMWSv+uAqHfgH88ak5UXZmlKLVJhd
+dj78s1Fxnzo6yUCrV6rrDOkluG+QzCAUTbCwf9SrmMLzK6p+OPHx7DF+bsfMRq7Ec61Av9i6GLw23r
+idnZ+/OO0a99pbIrJkproCQMA17OPG6suq3cca5ruDfXCCDoS7BEdvmJn5otdqscn+uogRHHXs8cbh
+EIfYaDY1AkrC0cqwcZpnM6ludx72x0p7Fo/hZAcpJDjax0UdHavMKAbiKltMWCF3xxh9k25N/Viud8
+ba78iCvUkt+V6BpwMlErmcgc502x+u1nSxJSJP9Mi52awD1V4yB/QHONsnU3L+A/zR4VL/indx/y64
+gqcj+qgTeweM86f0Qy1QVbvmWH1D9h+alqg254QD8HJXHvjQaGOqEqC22M54PcftZVKVSQG9jhkv7C
+JyTyDoAJfPdu8v7DRZAxsP/ky9MJ3OL36DJfCFPASC3/aXlfLOOON9vGZZHydGf8LnxYJuuVIbl83y
+Az5n/RPz07E+9+zw2A2ahz4HxHo9Kt79HTMx1Q7ma7zAzHgHqYH0SoZWyTuOLMiHwSfZDAQTn0ajk9
+YQqodnUYjByQZhZak9Wu4gYQsMyEpIOAOQKze8CmEF45KuAHTvIDOfHJNipwoHMuGHBnJElUoDmAyX
+c2Qm/R8Ah/iILCCJOEokGowdhDYc/yoL+vpRGwyVSCWFYZNljkhEirGXsalWcAgOdeAdoXcktF2udb
+qbUhjWyMQxYO01o6KYKOr6iK3fE4MaS+DsvBsGOBaMb0Y6IxADaJhFICaOLmiWTlDAnY1KzDG4ambL
+cWBA8mUzjJsN2KjSaSXGqMCVXYpYkj33mcIApyhQf6YqgeNAmNvuC0t4CsDbSshZJkCS1eNisKqlyG
+cF8G2JeiDX6tO6Mv0SmjCa3MFb0bJaGPMU0X7c8XcpvMaOQmCajwSeY9G0WqbBmKv34DsMIEztU6Y2
+KiDlFdt6jnCSqx7Dmt6XnqSKaFFHNO5+FmODxMCWBEaco77lNDGXBM0ECYB/+s7nKFdwSF5hgXumQe
+EZ7amRg39RHy3zIjyRCykQh8Zo2iviRKyTDn/zx6EefptJj2Cw+Ep2FSc01U5ry4KLPYsTyWnVGnvb
+UpyGlhjBUljyjHhWpf8OFaXwhp9O4T1gU9UeyPPa8A2l0p1kNqPXEVRm1AOs1oAGZU596t6SOR2mcB
+Oco1srWtkaVrMUzIErrKri85keKqRQYX9VX0/eAUK1hrSu6HMEX3Qh2sCh0q0D2CtnUqS4hj62sE/z
+aDs2Sg7MBS6xnQeooc2R2tC9YrKpEi9pLXfYXp20tDCpSP8rKlrD4axprb9u1Df5hSbz9QU0cRpfgn
+kiIzwKucd0wsEHlLpe5yHXuc6FrNelOl7pY2+11kTWx7VpRu97dXA3DO1vbkhcb4zyvERYajQgAADs
+="""
+    ),
+    mimetype="image/png",
+)
+
+
+TEMPLATE = """\
+
+WSGI Information
+
+
    
+  
+  
    WSGI Information
    
+  
    
+    This page displays all available information about the WSGI server and
+    the underlying Python interpreter.
+  
    Python Interpreter
    
+  
+    
+      
+      
+      
+      
+      
    Python Version
+      %(python_version)s
+    
    Platform
+      %(platform)s [%(os)s]
+    
    API Version
+      %(api_version)s
+    
    Byteorder
+      %(byteorder)s
+    
    Werkzeug Version
+      %(werkzeug_version)s
+  
    
+  
    WSGI Environment
    
+  %(wsgi_env)s
    
+  
    Installed Eggs
    
+  
    
+    The following python packages were installed on the system as
+    Python eggs:
+  
      %(python_eggs)s
    
+  
    System Path
    
+  
    
+    The following paths are the current contents of the load path.  The
+    following entries are looked up for Python packages.  Note that not
+    all items in this path are folders.  Gray and underlined items are
+    entries pointing to invalid resources or used by custom import hooks
+    such as the zip importer.
+  
    
+    Items with a bright background were expanded for display from a relative
+    path.  If you encounter such paths in the output you might want to check
+    your setup as relative paths are usually problematic in multithreaded
+    environments.
+  
      %(sys_path)s
    
+
    
+"""
+
+
+def iter_sys_path() -> t.Iterator[t.Tuple[str, bool, bool]]:
+    if os.name == "posix":
+
+        def strip(x: str) -> str:
+            prefix = os.path.expanduser("~")
+            if x.startswith(prefix):
+                x = f"~{x[len(prefix) :]}"
+            return x
+
+    else:
+
+        def strip(x: str) -> str:
+            return x
+
+    cwd = os.path.abspath(os.getcwd())
+    for item in sys.path:
+        path = os.path.join(cwd, item or os.path.curdir)
+        yield strip(os.path.normpath(path)), not os.path.isdir(path), path != item
+
+
+def render_testapp(req: Request) -> bytes:
+    try:
+        import pkg_resources
+    except ImportError:
+        eggs: t.Iterable[t.Any] = ()
+    else:
+        eggs = sorted(
+            pkg_resources.working_set,
+            key=lambda x: x.project_name.lower(),  # type: ignore
+        )
+    python_eggs = []
+    for egg in eggs:
+        try:
+            version = egg.version
+        except (ValueError, AttributeError):
+            version = "unknown"
+        python_eggs.append(
+            f"
  2. {escape(egg.project_name)} [{escape(version)}]"
+        )
+
+    wsgi_env = []
+    sorted_environ = sorted(req.environ.items(), key=lambda x: repr(x[0]).lower())
+    for key, value in sorted_environ:
+        value = "".join(wrap(escape(repr(value))))
+        wsgi_env.append(f"{escape(str(key))}{value}")
+
+    sys_path = []
+    for item, virtual, expanded in iter_sys_path():
+        class_ = []
+        if virtual:
+            class_.append("virtual")
+        if expanded:
+            class_.append("exp")
+        class_ = f' class="{" ".join(class_)}"' if class_ else ""
+        sys_path.append(f"{escape(item)}")
+
+    return (
+        TEMPLATE
+        % {
+            "python_version": "
    ".join(escape(sys.version).splitlines()),
+            "platform": escape(sys.platform),
+            "os": escape(os.name),
+            "api_version": sys.api_version,
+            "byteorder": sys.byteorder,
+            "werkzeug_version": _werkzeug_version,
+            "python_eggs": "\n".join(python_eggs),
+            "wsgi_env": "\n".join(wsgi_env),
+            "sys_path": "\n".join(sys_path),
+        }
+    ).encode("utf-8")
+
+
+def test_app(
+    environ: "WSGIEnvironment", start_response: "StartResponse"
+) -> t.Iterable[bytes]:
+    """Simple test application that dumps the environment.  You can use
+    it to check if Werkzeug is working properly:
+
+    .. sourcecode:: pycon
+
+        >>> from werkzeug.serving import run_simple
+        >>> from werkzeug.testapp import test_app
+        >>> run_simple('localhost', 3000, test_app)
+         * Running on http://localhost:3000/
+
+    The application displays important information from the WSGI environment,
+    the Python interpreter and the installed libraries.
+    """
+    req = Request(environ, populate_request=False)
+    if req.args.get("resource") == "logo":
+        response = logo
+    else:
+        response = Response(render_testapp(req), mimetype="text/html")
+    return response(environ, start_response)
+
+
+if __name__ == "__main__":
+    from .serving import run_simple
+
+    run_simple("localhost", 5000, test_app, use_reloader=True)
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/urls.py b/.venv/lib/python3.6/site-packages/werkzeug/urls.py
new file mode 100644
index 0000000..9529da0
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/urls.py
@@ -0,0 +1,1211 @@
+"""Functions for working with URLs.
+
+Contains implementations of functions from :mod:`urllib.parse` that
+handle bytes and strings.
+"""
+import codecs
+import os
+import re
+import typing as t
+import warnings
+
+from ._internal import _check_str_tuple
+from ._internal import _decode_idna
+from ._internal import _encode_idna
+from ._internal import _make_encode_wrapper
+from ._internal import _to_str
+
+if t.TYPE_CHECKING:
+    from . import datastructures as ds
+
+# A regular expression for what a valid schema looks like
+_scheme_re = re.compile(r"^[a-zA-Z0-9+-.]+$")
+
+# Characters that are safe in any part of an URL.
+_always_safe = frozenset(
+    bytearray(
+        b"abcdefghijklmnopqrstuvwxyz"
+        b"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+        b"0123456789"
+        b"-._~"
+    )
+)
+
+_hexdigits = "0123456789ABCDEFabcdef"
+_hextobyte = {
+    f"{a}{b}".encode("ascii"): int(f"{a}{b}", 16)
+    for a in _hexdigits
+    for b in _hexdigits
+}
+_bytetohex = [f"%{char:02X}".encode("ascii") for char in range(256)]
+
+
+class _URLTuple(t.NamedTuple):
+    scheme: str
+    netloc: str
+    path: str
+    query: str
+    fragment: str
+
+
+class BaseURL(_URLTuple):
+    """Superclass of :py:class:`URL` and :py:class:`BytesURL`."""
+
+    __slots__ = ()
+    _at: str
+    _colon: str
+    _lbracket: str
+    _rbracket: str
+
+    def __str__(self) -> str:
+        return self.to_url()
+
+    def replace(self, **kwargs: t.Any) -> "BaseURL":
+        """Return an URL with the same values, except for those parameters
+        given new values by whichever keyword arguments are specified."""
+        return self._replace(**kwargs)
+
+    @property
+    def host(self) -> t.Optional[str]:
+        """The host part of the URL if available, otherwise `None`.  The
+        host is either the hostname or the IP address mentioned in the
+        URL.  It will not contain the port.
+        """
+        return self._split_host()[0]
+
+    @property
+    def ascii_host(self) -> t.Optional[str]:
+        """Works exactly like :attr:`host` but will return a result that
+        is restricted to ASCII.  If it finds a netloc that is not ASCII
+        it will attempt to idna decode it.  This is useful for socket
+        operations when the URL might include internationalized characters.
+        """
+        rv = self.host
+        if rv is not None and isinstance(rv, str):
+            try:
+                rv = _encode_idna(rv)  # type: ignore
+            except UnicodeError:
+                rv = rv.encode("ascii", "ignore")  # type: ignore
+        return _to_str(rv, "ascii", "ignore")
+
+    @property
+    def port(self) -> t.Optional[int]:
+        """The port in the URL as an integer if it was present, `None`
+        otherwise.  This does not fill in default ports.
+        """
+        try:
+            rv = int(_to_str(self._split_host()[1]))
+            if 0 <= rv <= 65535:
+                return rv
+        except (ValueError, TypeError):
+            pass
+        return None
+
+    @property
+    def auth(self) -> t.Optional[str]:
+        """The authentication part in the URL if available, `None`
+        otherwise.
+        """
+        return self._split_netloc()[0]
+
+    @property
+    def username(self) -> t.Optional[str]:
+        """The username if it was part of the URL, `None` otherwise.
+        This undergoes URL decoding and will always be a string.
+        """
+        rv = self._split_auth()[0]
+        if rv is not None:
+            return _url_unquote_legacy(rv)
+        return None
+
+    @property
+    def raw_username(self) -> t.Optional[str]:
+        """The username if it was part of the URL, `None` otherwise.
+        Unlike :attr:`username` this one is not being decoded.
+        """
+        return self._split_auth()[0]
+
+    @property
+    def password(self) -> t.Optional[str]:
+        """The password if it was part of the URL, `None` otherwise.
+        This undergoes URL decoding and will always be a string.
+        """
+        rv = self._split_auth()[1]
+        if rv is not None:
+            return _url_unquote_legacy(rv)
+        return None
+
+    @property
+    def raw_password(self) -> t.Optional[str]:
+        """The password if it was part of the URL, `None` otherwise.
+        Unlike :attr:`password` this one is not being decoded.
+        """
+        return self._split_auth()[1]
+
+    def decode_query(self, *args: t.Any, **kwargs: t.Any) -> "ds.MultiDict[str, str]":
+        """Decodes the query part of the URL.  Ths is a shortcut for
+        calling :func:`url_decode` on the query argument.  The arguments and
+        keyword arguments are forwarded to :func:`url_decode` unchanged.
+        """
+        return url_decode(self.query, *args, **kwargs)
+
+    def join(self, *args: t.Any, **kwargs: t.Any) -> "BaseURL":
+        """Joins this URL with another one.  This is just a convenience
+        function for calling into :meth:`url_join` and then parsing the
+        return value again.
+        """
+        return url_parse(url_join(self, *args, **kwargs))
+
+    def to_url(self) -> str:
+        """Returns a URL string or bytes depending on the type of the
+        information stored.  This is just a convenience function
+        for calling :meth:`url_unparse` for this URL.
+        """
+        return url_unparse(self)
+
+    def encode_netloc(self) -> str:
+        """Encodes the netloc part to an ASCII safe URL as bytes."""
+        rv = self.ascii_host or ""
+        if ":" in rv:
+            rv = f"[{rv}]"
+        port = self.port
+        if port is not None:
+            rv = f"{rv}:{port}"
+        auth = ":".join(
+            filter(
+                None,
+                [
+                    url_quote(self.raw_username or "", "utf-8", "strict", "/:%"),
+                    url_quote(self.raw_password or "", "utf-8", "strict", "/:%"),
+                ],
+            )
+        )
+        if auth:
+            rv = f"{auth}@{rv}"
+        return rv
+
+    def decode_netloc(self) -> str:
+        """Decodes the netloc part into a string."""
+        rv = _decode_idna(self.host or "")
+
+        if ":" in rv:
+            rv = f"[{rv}]"
+        port = self.port
+        if port is not None:
+            rv = f"{rv}:{port}"
+        auth = ":".join(
+            filter(
+                None,
+                [
+                    _url_unquote_legacy(self.raw_username or "", "/:%@"),
+                    _url_unquote_legacy(self.raw_password or "", "/:%@"),
+                ],
+            )
+        )
+        if auth:
+            rv = f"{auth}@{rv}"
+        return rv
+
+    def to_uri_tuple(self) -> "BaseURL":
+        """Returns a :class:`BytesURL` tuple that holds a URI.  This will
+        encode all the information in the URL properly to ASCII using the
+        rules a web browser would follow.
+
+        It's usually more interesting to directly call :meth:`iri_to_uri` which
+        will return a string.
+        """
+        return url_parse(iri_to_uri(self))
+
+    def to_iri_tuple(self) -> "BaseURL":
+        """Returns a :class:`URL` tuple that holds a IRI.  This will try
+        to decode as much information as possible in the URL without
+        losing information similar to how a web browser does it for the
+        URL bar.
+
+        It's usually more interesting to directly call :meth:`uri_to_iri` which
+        will return a string.
+        """
+        return url_parse(uri_to_iri(self))
+
+    def get_file_location(
+        self, pathformat: t.Optional[str] = None
+    ) -> t.Tuple[t.Optional[str], t.Optional[str]]:
+        """Returns a tuple with the location of the file in the form
+        ``(server, location)``.  If the netloc is empty in the URL or
+        points to localhost, it's represented as ``None``.
+
+        The `pathformat` by default is autodetection but needs to be set
+        when working with URLs of a specific system.  The supported values
+        are ``'windows'`` when working with Windows or DOS paths and
+        ``'posix'`` when working with posix paths.
+
+        If the URL does not point to a local file, the server and location
+        are both represented as ``None``.
+
+        :param pathformat: The expected format of the path component.
+                           Currently ``'windows'`` and ``'posix'`` are
+                           supported.  Defaults to ``None`` which is
+                           autodetect.
+        """
+        if self.scheme != "file":
+            return None, None
+
+        path = url_unquote(self.path)
+        host = self.netloc or None
+
+        if pathformat is None:
+            if os.name == "nt":
+                pathformat = "windows"
+            else:
+                pathformat = "posix"
+
+        if pathformat == "windows":
+            if path[:1] == "/" and path[1:2].isalpha() and path[2:3] in "|:":
+                path = f"{path[1:2]}:{path[3:]}"
+            windows_share = path[:3] in ("\\" * 3, "/" * 3)
+            import ntpath
+
+            path = ntpath.normpath(path)
+            # Windows shared drives are represented as ``\\host\\directory``.
+            # That results in a URL like ``file://///host/directory``, and a
+            # path like ``///host/directory``. We need to special-case this
+            # because the path contains the hostname.
+            if windows_share and host is None:
+                parts = path.lstrip("\\").split("\\", 1)
+                if len(parts) == 2:
+                    host, path = parts
+                else:
+                    host = parts[0]
+                    path = ""
+        elif pathformat == "posix":
+            import posixpath
+
+            path = posixpath.normpath(path)
+        else:
+            raise TypeError(f"Invalid path format {pathformat!r}")
+
+        if host in ("127.0.0.1", "::1", "localhost"):
+            host = None
+
+        return host, path
+
+    def _split_netloc(self) -> t.Tuple[t.Optional[str], str]:
+        if self._at in self.netloc:
+            auth, _, netloc = self.netloc.partition(self._at)
+            return auth, netloc
+        return None, self.netloc
+
+    def _split_auth(self) -> t.Tuple[t.Optional[str], t.Optional[str]]:
+        auth = self._split_netloc()[0]
+        if not auth:
+            return None, None
+        if self._colon not in auth:
+            return auth, None
+
+        username, _, password = auth.partition(self._colon)
+        return username, password
+
+    def _split_host(self) -> t.Tuple[t.Optional[str], t.Optional[str]]:
+        rv = self._split_netloc()[1]
+        if not rv:
+            return None, None
+
+        if not rv.startswith(self._lbracket):
+            if self._colon in rv:
+                host, _, port = rv.partition(self._colon)
+                return host, port
+            return rv, None
+
+        idx = rv.find(self._rbracket)
+        if idx < 0:
+            return rv, None
+
+        host = rv[1:idx]
+        rest = rv[idx + 1 :]
+        if rest.startswith(self._colon):
+            return host, rest[1:]
+        return host, None
+
+
+class URL(BaseURL):
+    """Represents a parsed URL.  This behaves like a regular tuple but
+    also has some extra attributes that give further insight into the
+    URL.
+    """
+
+    __slots__ = ()
+    _at = "@"
+    _colon = ":"
+    _lbracket = "["
+    _rbracket = "]"
+
+    def encode(self, charset: str = "utf-8", errors: str = "replace") -> "BytesURL":
+        """Encodes the URL to a tuple made out of bytes.  The charset is
+        only being used for the path, query and fragment.
+        """
+        return BytesURL(
+            self.scheme.encode("ascii"),  # type: ignore
+            self.encode_netloc(),
+            self.path.encode(charset, errors),  # type: ignore
+            self.query.encode(charset, errors),  # type: ignore
+            self.fragment.encode(charset, errors),  # type: ignore
+        )
+
+
+class BytesURL(BaseURL):
+    """Represents a parsed URL in bytes."""
+
+    __slots__ = ()
+    _at = b"@"  # type: ignore
+    _colon = b":"  # type: ignore
+    _lbracket = b"["  # type: ignore
+    _rbracket = b"]"  # type: ignore
+
+    def __str__(self) -> str:
+        return self.to_url().decode("utf-8", "replace")  # type: ignore
+
+    def encode_netloc(self) -> bytes:  # type: ignore
+        """Returns the netloc unchanged as bytes."""
+        return self.netloc  # type: ignore
+
+    def decode(self, charset: str = "utf-8", errors: str = "replace") -> "URL":
+        """Decodes the URL to a tuple made out of strings.  The charset is
+        only being used for the path, query and fragment.
+        """
+        return URL(
+            self.scheme.decode("ascii"),  # type: ignore
+            self.decode_netloc(),
+            self.path.decode(charset, errors),  # type: ignore
+            self.query.decode(charset, errors),  # type: ignore
+            self.fragment.decode(charset, errors),  # type: ignore
+        )
+
+
+_unquote_maps: t.Dict[t.FrozenSet[int], t.Dict[bytes, int]] = {frozenset(): _hextobyte}
+
+
+def _unquote_to_bytes(
+    string: t.Union[str, bytes], unsafe: t.Union[str, bytes] = ""
+) -> bytes:
+    if isinstance(string, str):
+        string = string.encode("utf-8")
+
+    if isinstance(unsafe, str):
+        unsafe = unsafe.encode("utf-8")
+
+    unsafe = frozenset(bytearray(unsafe))
+    groups = iter(string.split(b"%"))
+    result = bytearray(next(groups, b""))
+
+    try:
+        hex_to_byte = _unquote_maps[unsafe]
+    except KeyError:
+        hex_to_byte = _unquote_maps[unsafe] = {
+            h: b for h, b in _hextobyte.items() if b not in unsafe
+        }
+
+    for group in groups:
+        code = group[:2]
+
+        if code in hex_to_byte:
+            result.append(hex_to_byte[code])
+            result.extend(group[2:])
+        else:
+            result.append(37)  # %
+            result.extend(group)
+
+    return bytes(result)
+
+
+def _url_encode_impl(
+    obj: t.Union[t.Mapping[str, str], t.Iterable[t.Tuple[str, str]]],
+    charset: str,
+    sort: bool,
+    key: t.Optional[t.Callable[[t.Tuple[str, str]], t.Any]],
+) -> t.Iterator[str]:
+    from .datastructures import iter_multi_items
+
+    iterable: t.Iterable[t.Tuple[str, str]] = iter_multi_items(obj)
+
+    if sort:
+        iterable = sorted(iterable, key=key)
+
+    for key_str, value_str in iterable:
+        if value_str is None:
+            continue
+
+        if not isinstance(key_str, bytes):
+            key_bytes = str(key_str).encode(charset)
+        else:
+            key_bytes = key_str
+
+        if not isinstance(value_str, bytes):
+            value_bytes = str(value_str).encode(charset)
+        else:
+            value_bytes = value_str
+
+        yield f"{_fast_url_quote_plus(key_bytes)}={_fast_url_quote_plus(value_bytes)}"
+
+
+def _url_unquote_legacy(value: str, unsafe: str = "") -> str:
+    try:
+        return url_unquote(value, charset="utf-8", errors="strict", unsafe=unsafe)
+    except UnicodeError:
+        return url_unquote(value, charset="latin1", unsafe=unsafe)
+
+
+def url_parse(
+    url: str, scheme: t.Optional[str] = None, allow_fragments: bool = True
+) -> BaseURL:
+    """Parses a URL from a string into a :class:`URL` tuple.  If the URL
+    is lacking a scheme it can be provided as second argument. Otherwise,
+    it is ignored.  Optionally fragments can be stripped from the URL
+    by setting `allow_fragments` to `False`.
+
+    The inverse of this function is :func:`url_unparse`.
+
+    :param url: the URL to parse.
+    :param scheme: the default schema to use if the URL is schemaless.
+    :param allow_fragments: if set to `False` a fragment will be removed
+                            from the URL.
+    """
+    s = _make_encode_wrapper(url)
+    is_text_based = isinstance(url, str)
+
+    if scheme is None:
+        scheme = s("")
+    netloc = query = fragment = s("")
+    i = url.find(s(":"))
+    if i > 0 and _scheme_re.match(_to_str(url[:i], errors="replace")):
+        # make sure "iri" is not actually a port number (in which case
+        # "scheme" is really part of the path)
+        rest = url[i + 1 :]
+        if not rest or any(c not in s("0123456789") for c in rest):
+            # not a port number
+            scheme, url = url[:i].lower(), rest
+
+    if url[:2] == s("//"):
+        delim = len(url)
+        for c in s("/?#"):
+            wdelim = url.find(c, 2)
+            if wdelim >= 0:
+                delim = min(delim, wdelim)
+        netloc, url = url[2:delim], url[delim:]
+        if (s("[") in netloc and s("]") not in netloc) or (
+            s("]") in netloc and s("[") not in netloc
+        ):
+            raise ValueError("Invalid IPv6 URL")
+
+    if allow_fragments and s("#") in url:
+        url, fragment = url.split(s("#"), 1)
+    if s("?") in url:
+        url, query = url.split(s("?"), 1)
+
+    result_type = URL if is_text_based else BytesURL
+    return result_type(scheme, netloc, url, query, fragment)
+
+
+def _make_fast_url_quote(
+    charset: str = "utf-8",
+    errors: str = "strict",
+    safe: t.Union[str, bytes] = "/:",
+    unsafe: t.Union[str, bytes] = "",
+) -> t.Callable[[bytes], str]:
+    """Precompile the translation table for a URL encoding function.
+
+    Unlike :func:`url_quote`, the generated function only takes the
+    string to quote.
+
+    :param charset: The charset to encode the result with.
+    :param errors: How to handle encoding errors.
+    :param safe: An optional sequence of safe characters to never encode.
+    :param unsafe: An optional sequence of unsafe characters to always encode.
+    """
+    if isinstance(safe, str):
+        safe = safe.encode(charset, errors)
+
+    if isinstance(unsafe, str):
+        unsafe = unsafe.encode(charset, errors)
+
+    safe = (frozenset(bytearray(safe)) | _always_safe) - frozenset(bytearray(unsafe))
+    table = [chr(c) if c in safe else f"%{c:02X}" for c in range(256)]
+
+    def quote(string: bytes) -> str:
+        return "".join([table[c] for c in string])
+
+    return quote
+
+
+_fast_url_quote = _make_fast_url_quote()
+_fast_quote_plus = _make_fast_url_quote(safe=" ", unsafe="+")
+
+
+def _fast_url_quote_plus(string: bytes) -> str:
+    return _fast_quote_plus(string).replace(" ", "+")
+
+
+def url_quote(
+    string: t.Union[str, bytes],
+    charset: str = "utf-8",
+    errors: str = "strict",
+    safe: t.Union[str, bytes] = "/:",
+    unsafe: t.Union[str, bytes] = "",
+) -> str:
+    """URL encode a single string with a given encoding.
+
+    :param s: the string to quote.
+    :param charset: the charset to be used.
+    :param safe: an optional sequence of safe characters.
+    :param unsafe: an optional sequence of unsafe characters.
+
+    .. versionadded:: 0.9.2
+       The `unsafe` parameter was added.
+    """
+    if not isinstance(string, (str, bytes, bytearray)):
+        string = str(string)
+    if isinstance(string, str):
+        string = string.encode(charset, errors)
+    if isinstance(safe, str):
+        safe = safe.encode(charset, errors)
+    if isinstance(unsafe, str):
+        unsafe = unsafe.encode(charset, errors)
+    safe = (frozenset(bytearray(safe)) | _always_safe) - frozenset(bytearray(unsafe))
+    rv = bytearray()
+    for char in bytearray(string):
+        if char in safe:
+            rv.append(char)
+        else:
+            rv.extend(_bytetohex[char])
+    return bytes(rv).decode(charset)
+
+
+def url_quote_plus(
+    string: str, charset: str = "utf-8", errors: str = "strict", safe: str = ""
+) -> str:
+    """URL encode a single string with the given encoding and convert
+    whitespace to "+".
+
+    :param s: The string to quote.
+    :param charset: The charset to be used.
+    :param safe: An optional sequence of safe characters.
+    """
+    return url_quote(string, charset, errors, safe + " ", "+").replace(" ", "+")
+
+
+def url_unparse(components: t.Tuple[str, str, str, str, str]) -> str:
+    """The reverse operation to :meth:`url_parse`.  This accepts arbitrary
+    as well as :class:`URL` tuples and returns a URL as a string.
+
+    :param components: the parsed URL as tuple which should be converted
+                       into a URL string.
+    """
+    _check_str_tuple(components)
+    scheme, netloc, path, query, fragment = components
+    s = _make_encode_wrapper(scheme)
+    url = s("")
+
+    # We generally treat file:///x and file:/x the same which is also
+    # what browsers seem to do.  This also allows us to ignore a schema
+    # register for netloc utilization or having to differentiate between
+    # empty and missing netloc.
+    if netloc or (scheme and path.startswith(s("/"))):
+        if path and path[:1] != s("/"):
+            path = s("/") + path
+        url = s("//") + (netloc or s("")) + path
+    elif path:
+        url += path
+    if scheme:
+        url = scheme + s(":") + url
+    if query:
+        url = url + s("?") + query
+    if fragment:
+        url = url + s("#") + fragment
+    return url
+
+
+def url_unquote(
+    s: t.Union[str, bytes],
+    charset: str = "utf-8",
+    errors: str = "replace",
+    unsafe: str = "",
+) -> str:
+    """URL decode a single string with a given encoding.  If the charset
+    is set to `None` no decoding is performed and raw bytes are
+    returned.
+
+    :param s: the string to unquote.
+    :param charset: the charset of the query string.  If set to `None`
+        no decoding will take place.
+    :param errors: the error handling for the charset decoding.
+    """
+    rv = _unquote_to_bytes(s, unsafe)
+    if charset is None:
+        return rv
+    return rv.decode(charset, errors)
+
+
+def url_unquote_plus(
+    s: t.Union[str, bytes], charset: str = "utf-8", errors: str = "replace"
+) -> str:
+    """URL decode a single string with the given `charset` and decode "+" to
+    whitespace.
+
+    Per default encoding errors are ignored.  If you want a different behavior
+    you can set `errors` to ``'replace'`` or ``'strict'``.
+
+    :param s: The string to unquote.
+    :param charset: the charset of the query string.  If set to `None`
+        no decoding will take place.
+    :param errors: The error handling for the `charset` decoding.
+    """
+    if isinstance(s, str):
+        s = s.replace("+", " ")
+    else:
+        s = s.replace(b"+", b" ")
+    return url_unquote(s, charset, errors)
+
+
+def url_fix(s: str, charset: str = "utf-8") -> str:
+    r"""Sometimes you get an URL by a user that just isn't a real URL because
+    it contains unsafe characters like ' ' and so on. This function can fix
+    some of the problems in a similar way browsers handle data entered by the
+    user:
+
+    >>> url_fix('http://de.wikipedia.org/wiki/Elf (Begriffskl\xe4rung)')
+    'http://de.wikipedia.org/wiki/Elf%20(Begriffskl%C3%A4rung)'
+
+    :param s: the string with the URL to fix.
+    :param charset: The target charset for the URL if the url was given
+        as a string.
+    """
+    # First step is to switch to text processing and to convert
+    # backslashes (which are invalid in URLs anyways) to slashes.  This is
+    # consistent with what Chrome does.
+    s = _to_str(s, charset, "replace").replace("\\", "/")
+
+    # For the specific case that we look like a malformed windows URL
+    # we want to fix this up manually:
+    if s.startswith("file://") and s[7:8].isalpha() and s[8:10] in (":/", "|/"):
+        s = f"file:///{s[7:]}"
+
+    url = url_parse(s)
+    path = url_quote(url.path, charset, safe="/%+$!*'(),")
+    qs = url_quote_plus(url.query, charset, safe=":&%=+$!*'(),")
+    anchor = url_quote_plus(url.fragment, charset, safe=":&%=+$!*'(),")
+    return url_unparse((url.scheme, url.encode_netloc(), path, qs, anchor))
+
+
+# not-unreserved characters remain quoted when unquoting to IRI
+_to_iri_unsafe = "".join([chr(c) for c in range(128) if c not in _always_safe])
+
+
+def _codec_error_url_quote(e: UnicodeError) -> t.Tuple[str, int]:
+    """Used in :func:`uri_to_iri` after unquoting to re-quote any
+    invalid bytes.
+    """
+    # the docs state that UnicodeError does have these attributes,
+    # but mypy isn't picking them up
+    out = _fast_url_quote(e.object[e.start : e.end])  # type: ignore
+    return out, e.end  # type: ignore
+
+
+codecs.register_error("werkzeug.url_quote", _codec_error_url_quote)
+
+
+def uri_to_iri(
+    uri: t.Union[str, t.Tuple[str, str, str, str, str]],
+    charset: str = "utf-8",
+    errors: str = "werkzeug.url_quote",
+) -> str:
+    """Convert a URI to an IRI. All valid UTF-8 characters are unquoted,
+    leaving all reserved and invalid characters quoted. If the URL has
+    a domain, it is decoded from Punycode.
+
+    >>> uri_to_iri("http://xn--n3h.net/p%C3%A5th?q=%C3%A8ry%DF")
+    'http://\\u2603.net/p\\xe5th?q=\\xe8ry%DF'
+
+    :param uri: The URI to convert.
+    :param charset: The encoding to encode unquoted bytes with.
+    :param errors: Error handler to use during ``bytes.encode``. By
+        default, invalid bytes are left quoted.
+
+    .. versionchanged:: 0.15
+        All reserved and invalid characters remain quoted. Previously,
+        only some reserved characters were preserved, and invalid bytes
+        were replaced instead of left quoted.
+
+    .. versionadded:: 0.6
+    """
+    if isinstance(uri, tuple):
+        uri = url_unparse(uri)
+
+    uri = url_parse(_to_str(uri, charset))
+    path = url_unquote(uri.path, charset, errors, _to_iri_unsafe)
+    query = url_unquote(uri.query, charset, errors, _to_iri_unsafe)
+    fragment = url_unquote(uri.fragment, charset, errors, _to_iri_unsafe)
+    return url_unparse((uri.scheme, uri.decode_netloc(), path, query, fragment))
+
+
+# reserved characters remain unquoted when quoting to URI
+_to_uri_safe = ":/?#[]@!$&'()*+,;=%"
+
+
+def iri_to_uri(
+    iri: t.Union[str, t.Tuple[str, str, str, str, str]],
+    charset: str = "utf-8",
+    errors: str = "strict",
+    safe_conversion: bool = False,
+) -> str:
+    """Convert an IRI to a URI. All non-ASCII and unsafe characters are
+    quoted. If the URL has a domain, it is encoded to Punycode.
+
+    >>> iri_to_uri('http://\\u2603.net/p\\xe5th?q=\\xe8ry%DF')
+    'http://xn--n3h.net/p%C3%A5th?q=%C3%A8ry%DF'
+
+    :param iri: The IRI to convert.
+    :param charset: The encoding of the IRI.
+    :param errors: Error handler to use during ``bytes.encode``.
+    :param safe_conversion: Return the URL unchanged if it only contains
+        ASCII characters and no whitespace. See the explanation below.
+
+    There is a general problem with IRI conversion with some protocols
+    that are in violation of the URI specification. Consider the
+    following two IRIs::
+
+        magnet:?xt=uri:whatever
+        itms-services://?action=download-manifest
+
+    After parsing, we don't know if the scheme requires the ``//``,
+    which is dropped if empty, but conveys different meanings in the
+    final URL if it's present or not. In this case, you can use
+    ``safe_conversion``, which will return the URL unchanged if it only
+    contains ASCII characters and no whitespace. This can result in a
+    URI with unquoted characters if it was not already quoted correctly,
+    but preserves the URL's semantics. Werkzeug uses this for the
+    ``Location`` header for redirects.
+
+    .. versionchanged:: 0.15
+        All reserved characters remain unquoted. Previously, only some
+        reserved characters were left unquoted.
+
+    .. versionchanged:: 0.9.6
+       The ``safe_conversion`` parameter was added.
+
+    .. versionadded:: 0.6
+    """
+    if isinstance(iri, tuple):
+        iri = url_unparse(iri)
+
+    if safe_conversion:
+        # If we're not sure if it's safe to convert the URL, and it only
+        # contains ASCII characters, return it unconverted.
+        try:
+            native_iri = _to_str(iri)
+            ascii_iri = native_iri.encode("ascii")
+
+            # Only return if it doesn't have whitespace. (Why?)
+            if len(ascii_iri.split()) == 1:
+                return native_iri
+        except UnicodeError:
+            pass
+
+    iri = url_parse(_to_str(iri, charset, errors))
+    path = url_quote(iri.path, charset, errors, _to_uri_safe)
+    query = url_quote(iri.query, charset, errors, _to_uri_safe)
+    fragment = url_quote(iri.fragment, charset, errors, _to_uri_safe)
+    return url_unparse((iri.scheme, iri.encode_netloc(), path, query, fragment))
+
+
+def url_decode(
+    s: t.AnyStr,
+    charset: str = "utf-8",
+    decode_keys: None = None,
+    include_empty: bool = True,
+    errors: str = "replace",
+    separator: str = "&",
+    cls: t.Optional[t.Type["ds.MultiDict"]] = None,
+) -> "ds.MultiDict[str, str]":
+    """Parse a query string and return it as a :class:`MultiDict`.
+
+    :param s: The query string to parse.
+    :param charset: Decode bytes to string with this charset. If not
+        given, bytes are returned as-is.
+    :param include_empty: Include keys with empty values in the dict.
+    :param errors: Error handling behavior when decoding bytes.
+    :param separator: Separator character between pairs.
+    :param cls: Container to hold result instead of :class:`MultiDict`.
+
+    .. versionchanged:: 2.0
+        The ``decode_keys`` parameter is deprecated and will be removed
+        in Werkzeug 2.1.
+
+    .. versionchanged:: 0.5
+        In previous versions ";" and "&" could be used for url decoding.
+        Now only "&" is supported. If you want to use ";", a different
+        ``separator`` can be provided.
+
+    .. versionchanged:: 0.5
+        The ``cls`` parameter was added.
+    """
+    if decode_keys is not None:
+        warnings.warn(
+            "'decode_keys' is deprecated and will be removed in Werkzeug 2.1.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+    if cls is None:
+        from .datastructures import MultiDict  # noqa: F811
+
+        cls = MultiDict
+    if isinstance(s, str) and not isinstance(separator, str):
+        separator = separator.decode(charset or "ascii")
+    elif isinstance(s, bytes) and not isinstance(separator, bytes):
+        separator = separator.encode(charset or "ascii")  # type: ignore
+    return cls(
+        _url_decode_impl(
+            s.split(separator), charset, include_empty, errors  # type: ignore
+        )
+    )
+
+
+def url_decode_stream(
+    stream: t.IO[bytes],
+    charset: str = "utf-8",
+    decode_keys: None = None,
+    include_empty: bool = True,
+    errors: str = "replace",
+    separator: bytes = b"&",
+    cls: t.Optional[t.Type["ds.MultiDict"]] = None,
+    limit: t.Optional[int] = None,
+    return_iterator: bool = False,
+) -> "ds.MultiDict[str, str]":
+    """Works like :func:`url_decode` but decodes a stream.  The behavior
+    of stream and limit follows functions like
+    :func:`~werkzeug.wsgi.make_line_iter`.  The generator of pairs is
+    directly fed to the `cls` so you can consume the data while it's
+    parsed.
+
+    :param stream: a stream with the encoded querystring
+    :param charset: the charset of the query string.  If set to `None`
+        no decoding will take place.
+    :param include_empty: Set to `False` if you don't want empty values to
+                          appear in the dict.
+    :param errors: the decoding error behavior.
+    :param separator: the pair separator to be used, defaults to ``&``
+    :param cls: an optional dict class to use.  If this is not specified
+                       or `None` the default :class:`MultiDict` is used.
+    :param limit: the content length of the URL data.  Not necessary if
+                  a limited stream is provided.
+
+    .. versionchanged:: 2.0
+        The ``decode_keys`` and ``return_iterator`` parameters are
+        deprecated and will be removed in Werkzeug 2.1.
+
+    .. versionadded:: 0.8
+    """
+    from .wsgi import make_chunk_iter
+
+    if decode_keys is not None:
+        warnings.warn(
+            "'decode_keys' is deprecated and will be removed in Werkzeug 2.1.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+
+    pair_iter = make_chunk_iter(stream, separator, limit)
+    decoder = _url_decode_impl(pair_iter, charset, include_empty, errors)
+
+    if return_iterator:
+        warnings.warn(
+            "'return_iterator' is deprecated and will be removed in Werkzeug 2.1.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return decoder  # type: ignore
+
+    if cls is None:
+        from .datastructures import MultiDict  # noqa: F811
+
+        cls = MultiDict
+
+    return cls(decoder)
+
+
+def _url_decode_impl(
+    pair_iter: t.Iterable[t.AnyStr], charset: str, include_empty: bool, errors: str
+) -> t.Iterator[t.Tuple[str, str]]:
+    for pair in pair_iter:
+        if not pair:
+            continue
+        s = _make_encode_wrapper(pair)
+        equal = s("=")
+        if equal in pair:
+            key, value = pair.split(equal, 1)
+        else:
+            if not include_empty:
+                continue
+            key = pair
+            value = s("")
+        yield (
+            url_unquote_plus(key, charset, errors),
+            url_unquote_plus(value, charset, errors),
+        )
+
+
+def url_encode(
+    obj: t.Union[t.Mapping[str, str], t.Iterable[t.Tuple[str, str]]],
+    charset: str = "utf-8",
+    encode_keys: None = None,
+    sort: bool = False,
+    key: t.Optional[t.Callable[[t.Tuple[str, str]], t.Any]] = None,
+    separator: str = "&",
+) -> str:
+    """URL encode a dict/`MultiDict`.  If a value is `None` it will not appear
+    in the result string.  Per default only values are encoded into the target
+    charset strings.
+
+    :param obj: the object to encode into a query string.
+    :param charset: the charset of the query string.
+    :param sort: set to `True` if you want parameters to be sorted by `key`.
+    :param separator: the separator to be used for the pairs.
+    :param key: an optional function to be used for sorting.  For more details
+                check out the :func:`sorted` documentation.
+
+    .. versionchanged:: 2.0
+        The ``encode_keys`` parameter is deprecated and will be removed
+        in Werkzeug 2.1.
+
+    .. versionchanged:: 0.5
+        Added the ``sort``, ``key``, and ``separator`` parameters.
+    """
+    if encode_keys is not None:
+        warnings.warn(
+            "'encode_keys' is deprecated and will be removed in Werkzeug 2.1.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+    separator = _to_str(separator, "ascii")
+    return separator.join(_url_encode_impl(obj, charset, sort, key))
+
+
+def url_encode_stream(
+    obj: t.Union[t.Mapping[str, str], t.Iterable[t.Tuple[str, str]]],
+    stream: t.Optional[t.IO[str]] = None,
+    charset: str = "utf-8",
+    encode_keys: None = None,
+    sort: bool = False,
+    key: t.Optional[t.Callable[[t.Tuple[str, str]], t.Any]] = None,
+    separator: str = "&",
+) -> None:
+    """Like :meth:`url_encode` but writes the results to a stream
+    object.  If the stream is `None` a generator over all encoded
+    pairs is returned.
+
+    :param obj: the object to encode into a query string.
+    :param stream: a stream to write the encoded object into or `None` if
+                   an iterator over the encoded pairs should be returned.  In
+                   that case the separator argument is ignored.
+    :param charset: the charset of the query string.
+    :param sort: set to `True` if you want parameters to be sorted by `key`.
+    :param separator: the separator to be used for the pairs.
+    :param key: an optional function to be used for sorting.  For more details
+                check out the :func:`sorted` documentation.
+
+    .. versionchanged:: 2.0
+        The ``encode_keys`` parameter is deprecated and will be removed
+        in Werkzeug 2.1.
+
+    .. versionadded:: 0.8
+    """
+    if encode_keys is not None:
+        warnings.warn(
+            "'encode_keys' is deprecated and will be removed in Werkzeug 2.1.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+    separator = _to_str(separator, "ascii")
+    gen = _url_encode_impl(obj, charset, sort, key)
+    if stream is None:
+        return gen  # type: ignore
+    for idx, chunk in enumerate(gen):
+        if idx:
+            stream.write(separator)
+        stream.write(chunk)
+    return None
+
+
+def url_join(
+    base: t.Union[str, t.Tuple[str, str, str, str, str]],
+    url: t.Union[str, t.Tuple[str, str, str, str, str]],
+    allow_fragments: bool = True,
+) -> str:
+    """Join a base URL and a possibly relative URL to form an absolute
+    interpretation of the latter.
+
+    :param base: the base URL for the join operation.
+    :param url: the URL to join.
+    :param allow_fragments: indicates whether fragments should be allowed.
+    """
+    if isinstance(base, tuple):
+        base = url_unparse(base)
+    if isinstance(url, tuple):
+        url = url_unparse(url)
+
+    _check_str_tuple((base, url))
+    s = _make_encode_wrapper(base)
+
+    if not base:
+        return url
+    if not url:
+        return base
+
+    bscheme, bnetloc, bpath, bquery, bfragment = url_parse(
+        base, allow_fragments=allow_fragments
+    )
+    scheme, netloc, path, query, fragment = url_parse(url, bscheme, allow_fragments)
+    if scheme != bscheme:
+        return url
+    if netloc:
+        return url_unparse((scheme, netloc, path, query, fragment))
+    netloc = bnetloc
+
+    if path[:1] == s("/"):
+        segments = path.split(s("/"))
+    elif not path:
+        segments = bpath.split(s("/"))
+        if not query:
+            query = bquery
+    else:
+        segments = bpath.split(s("/"))[:-1] + path.split(s("/"))
+
+    # If the rightmost part is "./" we want to keep the slash but
+    # remove the dot.
+    if segments[-1] == s("."):
+        segments[-1] = s("")
+
+    # Resolve ".." and "."
+    segments = [segment for segment in segments if segment != s(".")]
+    while True:
+        i = 1
+        n = len(segments) - 1
+        while i < n:
+            if segments[i] == s("..") and segments[i - 1] not in (s(""), s("..")):
+                del segments[i - 1 : i + 1]
+                break
+            i += 1
+        else:
+            break
+
+    # Remove trailing ".." if the URL is absolute
+    unwanted_marker = [s(""), s("..")]
+    while segments[:2] == unwanted_marker:
+        del segments[1]
+
+    path = s("/").join(segments)
+    return url_unparse((scheme, netloc, path, query, fragment))
+
+
+class Href:
+    """Implements a callable that constructs URLs with the given base. The
+    function can be called with any number of positional and keyword
+    arguments which than are used to assemble the URL.  Works with URLs
+    and posix paths.
+
+    Positional arguments are appended as individual segments to
+    the path of the URL:
+
+    >>> href = Href('/foo')
+    >>> href('bar', 23)
+    '/foo/bar/23'
+    >>> href('foo', bar=23)
+    '/foo/foo?bar=23'
+
+    If any of the arguments (positional or keyword) evaluates to `None` it
+    will be skipped.  If no keyword arguments are given the last argument
+    can be a :class:`dict` or :class:`MultiDict` (or any other dict subclass),
+    otherwise the keyword arguments are used for the query parameters, cutting
+    off the first trailing underscore of the parameter name:
+
+    >>> href(is_=42)
+    '/foo?is=42'
+    >>> href({'foo': 'bar'})
+    '/foo?foo=bar'
+
+    Combining of both methods is not allowed:
+
+    >>> href({'foo': 'bar'}, bar=42)
+    Traceback (most recent call last):
+      ...
+    TypeError: keyword arguments and query-dicts can't be combined
+
+    Accessing attributes on the href object creates a new href object with
+    the attribute name as prefix:
+
+    >>> bar_href = href.bar
+    >>> bar_href("blub")
+    '/foo/bar/blub'
+
+    If `sort` is set to `True` the items are sorted by `key` or the default
+    sorting algorithm:
+
+    >>> href = Href("/", sort=True)
+    >>> href(a=1, b=2, c=3)
+    '/?a=1&b=2&c=3'
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Use :mod:`werkzeug.routing`
+        instead.
+
+    .. versionadded:: 0.5
+        `sort` and `key` were added.
+    """
+
+    def __init__(  # type: ignore
+        self, base="./", charset="utf-8", sort=False, key=None
+    ):
+        warnings.warn(
+            "'Href' is deprecated and will be removed in Werkzeug 2.1."
+            " Use 'werkzeug.routing' instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+
+        if not base:
+            base = "./"
+        self.base = base
+        self.charset = charset
+        self.sort = sort
+        self.key = key
+
+    def __getattr__(self, name):  # type: ignore
+        if name[:2] == "__":
+            raise AttributeError(name)
+        base = self.base
+        if base[-1:] != "/":
+            base += "/"
+        return Href(url_join(base, name), self.charset, self.sort, self.key)
+
+    def __call__(self, *path, **query):  # type: ignore
+        if path and isinstance(path[-1], dict):
+            if query:
+                raise TypeError("keyword arguments and query-dicts can't be combined")
+            query, path = path[-1], path[:-1]
+        elif query:
+            query = {k[:-1] if k.endswith("_") else k: v for k, v in query.items()}
+        path = "/".join(
+            [
+                _to_str(url_quote(x, self.charset), "ascii")
+                for x in path
+                if x is not None
+            ]
+        ).lstrip("/")
+        rv = self.base
+        if path:
+            if not rv.endswith("/"):
+                rv += "/"
+            rv = url_join(rv, f"./{path}")
+        if query:
+            rv += "?" + _to_str(
+                url_encode(query, self.charset, sort=self.sort, key=self.key), "ascii"
+            )
+        return rv
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/user_agent.py b/.venv/lib/python3.6/site-packages/werkzeug/user_agent.py
new file mode 100644
index 0000000..66ffcbe
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/user_agent.py
@@ -0,0 +1,47 @@
+import typing as t
+
+
+class UserAgent:
+    """Represents a parsed user agent header value.
+
+    The default implementation does no parsing, only the :attr:`string`
+    attribute is set. A subclass may parse the string to set the
+    common attributes or expose other information. Set
+    :attr:`werkzeug.wrappers.Request.user_agent_class` to use a
+    subclass.
+
+    :param string: The header value to parse.
+
+    .. versionadded:: 2.0
+        This replaces the previous ``useragents`` module, but does not
+        provide a built-in parser.
+    """
+
+    platform: t.Optional[str] = None
+    """The OS name, if it could be parsed from the string."""
+
+    browser: t.Optional[str] = None
+    """The browser name, if it could be parsed from the string."""
+
+    version: t.Optional[str] = None
+    """The browser version, if it could be parsed from the string."""
+
+    language: t.Optional[str] = None
+    """The browser language, if it could be parsed from the string."""
+
+    def __init__(self, string: str) -> None:
+        self.string: str = string
+        """The original header value."""
+
+    def __repr__(self) -> str:
+        return f"<{type(self).__name__} {self.browser}/{self.version}>"
+
+    def __str__(self) -> str:
+        return self.string
+
+    def __bool__(self) -> bool:
+        return bool(self.browser)
+
+    def to_header(self) -> str:
+        """Convert to a header value."""
+        return self.string
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/useragents.py b/.venv/lib/python3.6/site-packages/werkzeug/useragents.py
new file mode 100644
index 0000000..4deed8f
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/useragents.py
@@ -0,0 +1,215 @@
+import re
+import typing as t
+import warnings
+
+from .user_agent import UserAgent as _BaseUserAgent
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import WSGIEnvironment
+
+
+class _UserAgentParser:
+    platform_rules: t.ClassVar[t.Iterable[t.Tuple[str, str]]] = (
+        (" cros ", "chromeos"),
+        ("iphone|ios", "iphone"),
+        ("ipad", "ipad"),
+        (r"darwin\b|mac\b|os\s*x", "macos"),
+        ("win", "windows"),
+        (r"android", "android"),
+        ("netbsd", "netbsd"),
+        ("openbsd", "openbsd"),
+        ("freebsd", "freebsd"),
+        ("dragonfly", "dragonflybsd"),
+        ("(sun|i86)os", "solaris"),
+        (r"x11\b|lin(\b|ux)?", "linux"),
+        (r"nintendo\s+wii", "wii"),
+        ("irix", "irix"),
+        ("hp-?ux", "hpux"),
+        ("aix", "aix"),
+        ("sco|unix_sv", "sco"),
+        ("bsd", "bsd"),
+        ("amiga", "amiga"),
+        ("blackberry|playbook", "blackberry"),
+        ("symbian", "symbian"),
+    )
+    browser_rules: t.ClassVar[t.Iterable[t.Tuple[str, str]]] = (
+        ("googlebot", "google"),
+        ("msnbot", "msn"),
+        ("yahoo", "yahoo"),
+        ("ask jeeves", "ask"),
+        (r"aol|america\s+online\s+browser", "aol"),
+        (r"opera|opr", "opera"),
+        ("edge|edg", "edge"),
+        ("chrome|crios", "chrome"),
+        ("seamonkey", "seamonkey"),
+        ("firefox|firebird|phoenix|iceweasel", "firefox"),
+        ("galeon", "galeon"),
+        ("safari|version", "safari"),
+        ("webkit", "webkit"),
+        ("camino", "camino"),
+        ("konqueror", "konqueror"),
+        ("k-meleon", "kmeleon"),
+        ("netscape", "netscape"),
+        (r"msie|microsoft\s+internet\s+explorer|trident/.+? rv:", "msie"),
+        ("lynx", "lynx"),
+        ("links", "links"),
+        ("Baiduspider", "baidu"),
+        ("bingbot", "bing"),
+        ("mozilla", "mozilla"),
+    )
+
+    _browser_version_re = r"(?:{pattern})[/\sa-z(]*(\d+[.\da-z]+)?"
+    _language_re = re.compile(
+        r"(?:;\s*|\s+)(\b\w{2}\b(?:-\b\w{2}\b)?)\s*;|"
+        r"(?:\(|\[|;)\s*(\b\w{2}\b(?:-\b\w{2}\b)?)\s*(?:\]|\)|;)"
+    )
+
+    def __init__(self) -> None:
+        self.platforms = [(b, re.compile(a, re.I)) for a, b in self.platform_rules]
+        self.browsers = [
+            (b, re.compile(self._browser_version_re.format(pattern=a), re.I))
+            for a, b in self.browser_rules
+        ]
+
+    def __call__(
+        self, user_agent: str
+    ) -> t.Tuple[t.Optional[str], t.Optional[str], t.Optional[str], t.Optional[str]]:
+        platform: t.Optional[str]
+        browser: t.Optional[str]
+        version: t.Optional[str]
+        language: t.Optional[str]
+
+        for platform, regex in self.platforms:  # noqa: B007
+            match = regex.search(user_agent)
+            if match is not None:
+                break
+        else:
+            platform = None
+
+        # Except for Trident, all browser key words come after the last ')'
+        last_closing_paren = 0
+        if (
+            not re.compile(r"trident/.+? rv:", re.I).search(user_agent)
+            and ")" in user_agent
+            and user_agent[-1] != ")"
+        ):
+            last_closing_paren = user_agent.rindex(")")
+
+        for browser, regex in self.browsers:  # noqa: B007
+            match = regex.search(user_agent[last_closing_paren:])
+            if match is not None:
+                version = match.group(1)
+                break
+        else:
+            browser = version = None
+        match = self._language_re.search(user_agent)
+        if match is not None:
+            language = match.group(1) or match.group(2)
+        else:
+            language = None
+        return platform, browser, version, language
+
+
+# It wasn't public, but users might have imported it anyway, show a
+# warning if a user created an instance.
+class UserAgentParser(_UserAgentParser):
+    """A simple user agent parser.  Used by the `UserAgent`.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Use a dedicated parser library
+        instead.
+    """
+
+    def __init__(self) -> None:
+        warnings.warn(
+            "'UserAgentParser' is deprecated and will be removed in"
+            " Werkzeug 2.1. Use a dedicated parser library instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__()
+
+
+class _deprecated_property(property):
+    def __init__(self, fget: t.Callable[["_UserAgent"], t.Any]) -> None:
+        super().__init__(fget)
+        self.message = (
+            "The built-in user agent parser is deprecated and will be"
+            f" removed in Werkzeug 2.1. The {fget.__name__!r} property"
+            " will be 'None'. Subclass 'werkzeug.user_agent.UserAgent'"
+            " and set 'Request.user_agent_class' to use a different"
+            " parser."
+        )
+
+    def __get__(self, *args: t.Any, **kwargs: t.Any) -> t.Any:
+        warnings.warn(self.message, DeprecationWarning, stacklevel=3)
+        return super().__get__(*args, **kwargs)
+
+
+# This is what Request.user_agent returns for now, only show warnings on
+# attribute access, not creation.
+class _UserAgent(_BaseUserAgent):
+    _parser = _UserAgentParser()
+
+    def __init__(self, string: str) -> None:
+        super().__init__(string)
+        info = self._parser(string)
+        self._platform, self._browser, self._version, self._language = info
+
+    @_deprecated_property
+    def platform(self) -> t.Optional[str]:  # type: ignore
+        return self._platform
+
+    @_deprecated_property
+    def browser(self) -> t.Optional[str]:  # type: ignore
+        return self._browser
+
+    @_deprecated_property
+    def version(self) -> t.Optional[str]:  # type: ignore
+        return self._version
+
+    @_deprecated_property
+    def language(self) -> t.Optional[str]:  # type: ignore
+        return self._language
+
+
+# This is what users might be importing, show warnings on create.
+class UserAgent(_UserAgent):
+    """Represents a parsed user agent header value.
+
+    This uses a basic parser to try to extract some information from the
+    header.
+
+    :param environ_or_string: The header value to parse, or a WSGI
+        environ containing the header.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Subclass
+        :class:`werkzeug.user_agent.UserAgent` (note the new module
+        name) to use a dedicated parser instead.
+
+    .. versionchanged:: 2.0
+        Passing a WSGI environ is deprecated and will be removed in 2.1.
+    """
+
+    def __init__(self, environ_or_string: "t.Union[str, WSGIEnvironment]") -> None:
+        if isinstance(environ_or_string, dict):
+            warnings.warn(
+                "Passing an environ to 'UserAgent' is deprecated and"
+                " will be removed in Werkzeug 2.1. Pass the header"
+                " value string instead.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+            string = environ_or_string.get("HTTP_USER_AGENT", "")
+        else:
+            string = environ_or_string
+
+        warnings.warn(
+            "The 'werkzeug.useragents' module is deprecated and will be"
+            " removed in Werkzeug 2.1. The new base API is"
+            " 'werkzeug.user_agent.UserAgent'.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(string)
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/utils.py b/.venv/lib/python3.6/site-packages/werkzeug/utils.py
new file mode 100644
index 0000000..9007231
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/utils.py
@@ -0,0 +1,1099 @@
+import codecs
+import io
+import mimetypes
+import os
+import pkgutil
+import re
+import sys
+import typing as t
+import unicodedata
+import warnings
+from datetime import datetime
+from html.entities import name2codepoint
+from time import time
+from zlib import adler32
+
+from ._internal import _DictAccessorProperty
+from ._internal import _missing
+from ._internal import _parse_signature
+from ._internal import _TAccessorValue
+from .datastructures import Headers
+from .exceptions import NotFound
+from .exceptions import RequestedRangeNotSatisfiable
+from .security import safe_join
+from .urls import url_quote
+from .wsgi import wrap_file
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import WSGIEnvironment
+    from .wrappers.request import Request
+    from .wrappers.response import Response
+
+_T = t.TypeVar("_T")
+
+_entity_re = re.compile(r"&([^;]+);")
+_filename_ascii_strip_re = re.compile(r"[^A-Za-z0-9_.-]")
+_windows_device_files = (
+    "CON",
+    "AUX",
+    "COM1",
+    "COM2",
+    "COM3",
+    "COM4",
+    "LPT1",
+    "LPT2",
+    "LPT3",
+    "PRN",
+    "NUL",
+)
+
+
+class cached_property(property, t.Generic[_T]):
+    """A :func:`property` that is only evaluated once. Subsequent access
+    returns the cached value. Setting the property sets the cached
+    value. Deleting the property clears the cached value, accessing it
+    again will evaluate it again.
+
+    .. code-block:: python
+
+        class Example:
+            @cached_property
+            def value(self):
+                # calculate something important here
+                return 42
+
+        e = Example()
+        e.value  # evaluates
+        e.value  # uses cache
+        e.value = 16  # sets cache
+        del e.value  # clears cache
+
+    The class must have a ``__dict__`` for this to work.
+
+    .. versionchanged:: 2.0
+        ``del obj.name`` clears the cached value.
+    """
+
+    def __init__(
+        self,
+        fget: t.Callable[[t.Any], _T],
+        name: t.Optional[str] = None,
+        doc: t.Optional[str] = None,
+    ) -> None:
+        super().__init__(fget, doc=doc)
+        self.__name__ = name or fget.__name__
+        self.__module__ = fget.__module__
+
+    def __set__(self, obj: object, value: _T) -> None:
+        obj.__dict__[self.__name__] = value
+
+    def __get__(self, obj: object, type: type = None) -> _T:  # type: ignore
+        if obj is None:
+            return self  # type: ignore
+
+        value: _T = obj.__dict__.get(self.__name__, _missing)
+
+        if value is _missing:
+            value = self.fget(obj)  # type: ignore
+            obj.__dict__[self.__name__] = value
+
+        return value
+
+    def __delete__(self, obj: object) -> None:
+        del obj.__dict__[self.__name__]
+
+
+def invalidate_cached_property(obj: object, name: str) -> None:
+    """Invalidates the cache for a :class:`cached_property`:
+
+    >>> class Test(object):
+    ...     @cached_property
+    ...     def magic_number(self):
+    ...         print("recalculating...")
+    ...         return 42
+    ...
+    >>> var = Test()
+    >>> var.magic_number
+    recalculating...
+    42
+    >>> var.magic_number
+    42
+    >>> invalidate_cached_property(var, "magic_number")
+    >>> var.magic_number
+    recalculating...
+    42
+
+    You must pass the name of the cached property as the second argument.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Use ``del obj.name`` instead.
+    """
+    warnings.warn(
+        "'invalidate_cached_property' is deprecated and will be removed"
+        " in Werkzeug 2.1. Use 'del obj.name' instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    delattr(obj, name)
+
+
+class environ_property(_DictAccessorProperty[_TAccessorValue]):
+    """Maps request attributes to environment variables. This works not only
+    for the Werkzeug request object, but also any other class with an
+    environ attribute:
+
+    >>> class Test(object):
+    ...     environ = {'key': 'value'}
+    ...     test = environ_property('key')
+    >>> var = Test()
+    >>> var.test
+    'value'
+
+    If you pass it a second value it's used as default if the key does not
+    exist, the third one can be a converter that takes a value and converts
+    it.  If it raises :exc:`ValueError` or :exc:`TypeError` the default value
+    is used. If no default value is provided `None` is used.
+
+    Per default the property is read only.  You have to explicitly enable it
+    by passing ``read_only=False`` to the constructor.
+    """
+
+    read_only = True
+
+    def lookup(self, obj: "Request") -> "WSGIEnvironment":
+        return obj.environ
+
+
+class header_property(_DictAccessorProperty[_TAccessorValue]):
+    """Like `environ_property` but for headers."""
+
+    def lookup(self, obj: t.Union["Request", "Response"]) -> Headers:
+        return obj.headers
+
+
+class HTMLBuilder:
+    """Helper object for HTML generation.
+
+    Per default there are two instances of that class.  The `html` one, and
+    the `xhtml` one for those two dialects.  The class uses keyword parameters
+    and positional parameters to generate small snippets of HTML.
+
+    Keyword parameters are converted to XML/SGML attributes, positional
+    arguments are used as children.  Because Python accepts positional
+    arguments before keyword arguments it's a good idea to use a list with the
+    star-syntax for some children:
+
+    >>> html.p(class_='foo', *[html.a('foo', href='foo.html'), ' ',
+    ...                        html.a('bar', href='bar.html')])
+    '
    foo bar
    '
+
+    This class works around some browser limitations and can not be used for
+    arbitrary SGML/XML generation.  For that purpose lxml and similar
+    libraries exist.
+
+    Calling the builder escapes the string passed:
+
+    >>> html.p(html(""))
+    '
    <foo>
    '
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1.
+    """
+
+    _entity_re = re.compile(r"&([^;]+);")
+    _entities = name2codepoint.copy()
+    _entities["apos"] = 39
+    _empty_elements = {
+        "area",
+        "base",
+        "basefont",
+        "br",
+        "col",
+        "command",
+        "embed",
+        "frame",
+        "hr",
+        "img",
+        "input",
+        "keygen",
+        "isindex",
+        "link",
+        "meta",
+        "param",
+        "source",
+        "wbr",
+    }
+    _boolean_attributes = {
+        "selected",
+        "checked",
+        "compact",
+        "declare",
+        "defer",
+        "disabled",
+        "ismap",
+        "multiple",
+        "nohref",
+        "noresize",
+        "noshade",
+        "nowrap",
+    }
+    _plaintext_elements = {"textarea"}
+    _c_like_cdata = {"script", "style"}
+
+    def __init__(self, dialect):  # type: ignore
+        self._dialect = dialect
+
+    def __call__(self, s):  # type: ignore
+        import html
+
+        warnings.warn(
+            "'utils.HTMLBuilder' is deprecated and will be removed in Werkzeug 2.1.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return html.escape(s)
+
+    def __getattr__(self, tag):  # type: ignore
+        import html
+
+        warnings.warn(
+            "'utils.HTMLBuilder' is deprecated and will be removed in Werkzeug 2.1.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        if tag[:2] == "__":
+            raise AttributeError(tag)
+
+        def proxy(*children, **arguments):  # type: ignore
+            buffer = f"<{tag}"
+            for key, value in arguments.items():
+                if value is None:
+                    continue
+                if key[-1] == "_":
+                    key = key[:-1]
+                if key in self._boolean_attributes:
+                    if not value:
+                        continue
+                    if self._dialect == "xhtml":
+                        value = f'="{key}"'
+                    else:
+                        value = ""
+                else:
+                    value = f'="{html.escape(value)}"'
+                buffer += f" {key}{value}"
+            if not children and tag in self._empty_elements:
+                if self._dialect == "xhtml":
+                    buffer += " />"
+                else:
+                    buffer += ">"
+                return buffer
+            buffer += ">"
+
+            children_as_string = "".join([str(x) for x in children if x is not None])
+
+            if children_as_string:
+                if tag in self._plaintext_elements:
+                    children_as_string = html.escape(children_as_string)
+                elif tag in self._c_like_cdata and self._dialect == "xhtml":
+                    children_as_string = f"/**/"
+            buffer += children_as_string + f""
+            return buffer
+
+        return proxy
+
+    def __repr__(self) -> str:
+        return f"<{type(self).__name__} for {self._dialect!r}>"
+
+
+html = HTMLBuilder("html")
+xhtml = HTMLBuilder("xhtml")
+
+# https://cgit.freedesktop.org/xdg/shared-mime-info/tree/freedesktop.org.xml.in
+# https://www.iana.org/assignments/media-types/media-types.xhtml
+# Types listed in the XDG mime info that have a charset in the IANA registration.
+_charset_mimetypes = {
+    "application/ecmascript",
+    "application/javascript",
+    "application/sql",
+    "application/xml",
+    "application/xml-dtd",
+    "application/xml-external-parsed-entity",
+}
+
+
+def get_content_type(mimetype: str, charset: str) -> str:
+    """Returns the full content type string with charset for a mimetype.
+
+    If the mimetype represents text, the charset parameter will be
+    appended, otherwise the mimetype is returned unchanged.
+
+    :param mimetype: The mimetype to be used as content type.
+    :param charset: The charset to be appended for text mimetypes.
+    :return: The content type.
+
+    .. versionchanged:: 0.15
+        Any type that ends with ``+xml`` gets a charset, not just those
+        that start with ``application/``. Known text types such as
+        ``application/javascript`` are also given charsets.
+    """
+    if (
+        mimetype.startswith("text/")
+        or mimetype in _charset_mimetypes
+        or mimetype.endswith("+xml")
+    ):
+        mimetype += f"; charset={charset}"
+
+    return mimetype
+
+
+def detect_utf_encoding(data: bytes) -> str:
+    """Detect which UTF encoding was used to encode the given bytes.
+
+    The latest JSON standard (:rfc:`8259`) suggests that only UTF-8 is
+    accepted. Older documents allowed 8, 16, or 32. 16 and 32 can be big
+    or little endian. Some editors or libraries may prepend a BOM.
+
+    :internal:
+
+    :param data: Bytes in unknown UTF encoding.
+    :return: UTF encoding name
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. This is built in to
+        :func:`json.loads`.
+
+    .. versionadded:: 0.15
+    """
+    warnings.warn(
+        "'detect_utf_encoding' is deprecated and will be removed in"
+        " Werkzeug 2.1. This is built in to 'json.loads'.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    head = data[:4]
+
+    if head[:3] == codecs.BOM_UTF8:
+        return "utf-8-sig"
+
+    if b"\x00" not in head:
+        return "utf-8"
+
+    if head in (codecs.BOM_UTF32_BE, codecs.BOM_UTF32_LE):
+        return "utf-32"
+
+    if head[:2] in (codecs.BOM_UTF16_BE, codecs.BOM_UTF16_LE):
+        return "utf-16"
+
+    if len(head) == 4:
+        if head[:3] == b"\x00\x00\x00":
+            return "utf-32-be"
+
+        if head[::2] == b"\x00\x00":
+            return "utf-16-be"
+
+        if head[1:] == b"\x00\x00\x00":
+            return "utf-32-le"
+
+        if head[1::2] == b"\x00\x00":
+            return "utf-16-le"
+
+    if len(head) == 2:
+        return "utf-16-be" if head.startswith(b"\x00") else "utf-16-le"
+
+    return "utf-8"
+
+
+def format_string(string: str, context: t.Mapping[str, t.Any]) -> str:
+    """String-template format a string:
+
+    >>> format_string('$foo and ${foo}s', dict(foo=42))
+    '42 and 42s'
+
+    This does not do any attribute lookup.
+
+    :param string: the format string.
+    :param context: a dict with the variables to insert.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Use :class:`string.Template`
+        instead.
+    """
+    from string import Template
+
+    warnings.warn(
+        "'utils.format_string' is deprecated and will be removed in"
+        " Werkzeug 2.1. Use 'string.Template' instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return Template(string).substitute(context)
+
+
+def secure_filename(filename: str) -> str:
+    r"""Pass it a filename and it will return a secure version of it.  This
+    filename can then safely be stored on a regular file system and passed
+    to :func:`os.path.join`.  The filename returned is an ASCII only string
+    for maximum portability.
+
+    On windows systems the function also makes sure that the file is not
+    named after one of the special device files.
+
+    >>> secure_filename("My cool movie.mov")
+    'My_cool_movie.mov'
+    >>> secure_filename("../../../etc/passwd")
+    'etc_passwd'
+    >>> secure_filename('i contain cool \xfcml\xe4uts.txt')
+    'i_contain_cool_umlauts.txt'
+
+    The function might return an empty filename.  It's your responsibility
+    to ensure that the filename is unique and that you abort or
+    generate a random filename if the function returned an empty one.
+
+    .. versionadded:: 0.5
+
+    :param filename: the filename to secure
+    """
+    filename = unicodedata.normalize("NFKD", filename)
+    filename = filename.encode("ascii", "ignore").decode("ascii")
+
+    for sep in os.path.sep, os.path.altsep:
+        if sep:
+            filename = filename.replace(sep, " ")
+    filename = str(_filename_ascii_strip_re.sub("", "_".join(filename.split()))).strip(
+        "._"
+    )
+
+    # on nt a couple of special files are present in each folder.  We
+    # have to ensure that the target file is not such a filename.  In
+    # this case we prepend an underline
+    if (
+        os.name == "nt"
+        and filename
+        and filename.split(".")[0].upper() in _windows_device_files
+    ):
+        filename = f"_{filename}"
+
+    return filename
+
+
+def escape(s: t.Any) -> str:
+    """Replace ``&``, ``<``, ``>``, ``"``, and ``'`` with HTML-safe
+    sequences.
+
+    ``None`` is escaped to an empty string.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Use MarkupSafe instead.
+    """
+    import html
+
+    warnings.warn(
+        "'utils.escape' is deprecated and will be removed in Werkzeug"
+        " 2.1. Use MarkupSafe instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+
+    if s is None:
+        return ""
+
+    if hasattr(s, "__html__"):
+        return s.__html__()  # type: ignore
+
+    if not isinstance(s, str):
+        s = str(s)
+
+    return html.escape(s, quote=True)  # type: ignore
+
+
+def unescape(s: str) -> str:
+    """The reverse of :func:`escape`. This unescapes all the HTML
+    entities, not only those inserted by ``escape``.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Use MarkupSafe instead.
+    """
+    import html
+
+    warnings.warn(
+        "'utils.unescape' is deprecated and will be removed in Werkzueg"
+        " 2.1. Use MarkupSafe instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return html.unescape(s)
+
+
+def redirect(
+    location: str, code: int = 302, Response: t.Optional[t.Type["Response"]] = None
+) -> "Response":
+    """Returns a response object (a WSGI application) that, if called,
+    redirects the client to the target location. Supported codes are
+    301, 302, 303, 305, 307, and 308. 300 is not supported because
+    it's not a real redirect and 304 because it's the answer for a
+    request with a request with defined If-Modified-Since headers.
+
+    .. versionadded:: 0.6
+       The location can now be a unicode string that is encoded using
+       the :func:`iri_to_uri` function.
+
+    .. versionadded:: 0.10
+        The class used for the Response object can now be passed in.
+
+    :param location: the location the response should redirect to.
+    :param code: the redirect status code. defaults to 302.
+    :param class Response: a Response class to use when instantiating a
+        response. The default is :class:`werkzeug.wrappers.Response` if
+        unspecified.
+    """
+    import html
+
+    if Response is None:
+        from .wrappers import Response  # type: ignore
+
+    display_location = html.escape(location)
+    if isinstance(location, str):
+        # Safe conversion is necessary here as we might redirect
+        # to a broken URI scheme (for instance itms-services).
+        from .urls import iri_to_uri
+
+        location = iri_to_uri(location, safe_conversion=True)
+    response = Response(  # type: ignore
+        '\n'
+        "Redirecting...\n"
+        "
    Redirecting...
    \n"
+        "
    You should be redirected automatically to target URL: "
+        f'{display_location}. If'
+        " not click the link.",
+        code,
+        mimetype="text/html",
+    )
+    response.headers["Location"] = location
+    return response
+
+
+def append_slash_redirect(environ: "WSGIEnvironment", code: int = 301) -> "Response":
+    """Redirects to the same URL but with a slash appended.  The behavior
+    of this function is undefined if the path ends with a slash already.
+
+    :param environ: the WSGI environment for the request that triggers
+                    the redirect.
+    :param code: the status code for the redirect.
+    """
+    new_path = environ["PATH_INFO"].strip("/") + "/"
+    query_string = environ.get("QUERY_STRING")
+    if query_string:
+        new_path += f"?{query_string}"
+    return redirect(new_path, code)
+
+
+def send_file(
+    path_or_file: t.Union[os.PathLike, str, t.IO[bytes]],
+    environ: "WSGIEnvironment",
+    mimetype: t.Optional[str] = None,
+    as_attachment: bool = False,
+    download_name: t.Optional[str] = None,
+    conditional: bool = True,
+    etag: t.Union[bool, str] = True,
+    last_modified: t.Optional[t.Union[datetime, int, float]] = None,
+    max_age: t.Optional[
+        t.Union[int, t.Callable[[t.Optional[str]], t.Optional[int]]]
+    ] = None,
+    use_x_sendfile: bool = False,
+    response_class: t.Optional[t.Type["Response"]] = None,
+    _root_path: t.Optional[t.Union[os.PathLike, str]] = None,
+) -> "Response":
+    """Send the contents of a file to the client.
+
+    The first argument can be a file path or a file-like object. Paths
+    are preferred in most cases because Werkzeug can manage the file and
+    get extra information from the path. Passing a file-like object
+    requires that the file is opened in binary mode, and is mostly
+    useful when building a file in memory with :class:`io.BytesIO`.
+
+    Never pass file paths provided by a user. The path is assumed to be
+    trusted, so a user could craft a path to access a file you didn't
+    intend.
+
+    If the WSGI server sets a ``file_wrapper`` in ``environ``, it is
+    used, otherwise Werkzeug's built-in wrapper is used. Alternatively,
+    if the HTTP server supports ``X-Sendfile``, ``use_x_sendfile=True``
+    will tell the server to send the given path, which is much more
+    efficient than reading it in Python.
+
+    :param path_or_file: The path to the file to send, relative to the
+        current working directory if a relative path is given.
+        Alternatively, a file-like object opened in binary mode. Make
+        sure the file pointer is seeked to the start of the data.
+    :param environ: The WSGI environ for the current request.
+    :param mimetype: The MIME type to send for the file. If not
+        provided, it will try to detect it from the file name.
+    :param as_attachment: Indicate to a browser that it should offer to
+        save the file instead of displaying it.
+    :param download_name: The default name browsers will use when saving
+        the file. Defaults to the passed file name.
+    :param conditional: Enable conditional and range responses based on
+        request headers. Requires passing a file path and ``environ``.
+    :param etag: Calculate an ETag for the file, which requires passing
+        a file path. Can also be a string to use instead.
+    :param last_modified: The last modified time to send for the file,
+        in seconds. If not provided, it will try to detect it from the
+        file path.
+    :param max_age: How long the client should cache the file, in
+        seconds. If set, ``Cache-Control`` will be ``public``, otherwise
+        it will be ``no-cache`` to prefer conditional caching.
+    :param use_x_sendfile: Set the ``X-Sendfile`` header to let the
+        server to efficiently send the file. Requires support from the
+        HTTP server. Requires passing a file path.
+    :param response_class: Build the response using this class. Defaults
+        to :class:`~werkzeug.wrappers.Response`.
+    :param _root_path: Do not use. For internal use only. Use
+        :func:`send_from_directory` to safely send files under a path.
+
+    .. versionchanged:: 2.0.2
+        ``send_file`` only sets a detected ``Content-Encoding`` if
+        ``as_attachment`` is disabled.
+
+    .. versionadded:: 2.0
+        Adapted from Flask's implementation.
+
+    .. versionchanged:: 2.0
+        ``download_name`` replaces Flask's ``attachment_filename``
+         parameter. If ``as_attachment=False``, it is passed with
+         ``Content-Disposition: inline`` instead.
+
+    .. versionchanged:: 2.0
+        ``max_age`` replaces Flask's ``cache_timeout`` parameter.
+        ``conditional`` is enabled and ``max_age`` is not set by
+        default.
+
+    .. versionchanged:: 2.0
+        ``etag`` replaces Flask's ``add_etags`` parameter. It can be a
+        string to use instead of generating one.
+
+    .. versionchanged:: 2.0
+        If an encoding is returned when guessing ``mimetype`` from
+        ``download_name``, set the ``Content-Encoding`` header.
+    """
+    if response_class is None:
+        from .wrappers import Response
+
+        response_class = Response
+
+    path: t.Optional[str] = None
+    file: t.Optional[t.IO[bytes]] = None
+    size: t.Optional[int] = None
+    mtime: t.Optional[float] = None
+    headers = Headers()
+
+    if isinstance(path_or_file, (os.PathLike, str)) or hasattr(
+        path_or_file, "__fspath__"
+    ):
+        path_or_file = t.cast(t.Union[os.PathLike, str], path_or_file)
+
+        # Flask will pass app.root_path, allowing its send_file wrapper
+        # to not have to deal with paths.
+        if _root_path is not None:
+            path = os.path.join(_root_path, path_or_file)
+        else:
+            path = os.path.abspath(path_or_file)
+
+        stat = os.stat(path)
+        size = stat.st_size
+        mtime = stat.st_mtime
+    else:
+        file = path_or_file
+
+    if download_name is None and path is not None:
+        download_name = os.path.basename(path)
+
+    if mimetype is None:
+        if download_name is None:
+            raise TypeError(
+                "Unable to detect the MIME type because a file name is"
+                " not available. Either set 'download_name', pass a"
+                " path instead of a file, or set 'mimetype'."
+            )
+
+        mimetype, encoding = mimetypes.guess_type(download_name)
+
+        if mimetype is None:
+            mimetype = "application/octet-stream"
+
+        # Don't send encoding for attachments, it causes browsers to
+        # save decompress tar.gz files.
+        if encoding is not None and not as_attachment:
+            headers.set("Content-Encoding", encoding)
+
+    if download_name is not None:
+        try:
+            download_name.encode("ascii")
+        except UnicodeEncodeError:
+            simple = unicodedata.normalize("NFKD", download_name)
+            simple = simple.encode("ascii", "ignore").decode("ascii")
+            quoted = url_quote(download_name, safe="")
+            names = {"filename": simple, "filename*": f"UTF-8''{quoted}"}
+        else:
+            names = {"filename": download_name}
+
+        value = "attachment" if as_attachment else "inline"
+        headers.set("Content-Disposition", value, **names)
+    elif as_attachment:
+        raise TypeError(
+            "No name provided for attachment. Either set"
+            " 'download_name' or pass a path instead of a file."
+        )
+
+    if use_x_sendfile and path is not None:
+        headers["X-Sendfile"] = path
+        data = None
+    else:
+        if file is None:
+            file = open(path, "rb")  # type: ignore
+        elif isinstance(file, io.BytesIO):
+            size = file.getbuffer().nbytes
+        elif isinstance(file, io.TextIOBase):
+            raise ValueError("Files must be opened in binary mode or use BytesIO.")
+
+        data = wrap_file(environ, file)
+
+    rv = response_class(
+        data, mimetype=mimetype, headers=headers, direct_passthrough=True
+    )
+
+    if size is not None:
+        rv.content_length = size
+
+    if last_modified is not None:
+        rv.last_modified = last_modified  # type: ignore
+    elif mtime is not None:
+        rv.last_modified = mtime  # type: ignore
+
+    rv.cache_control.no_cache = True
+
+    # Flask will pass app.get_send_file_max_age, allowing its send_file
+    # wrapper to not have to deal with paths.
+    if callable(max_age):
+        max_age = max_age(path)
+
+    if max_age is not None:
+        if max_age > 0:
+            rv.cache_control.no_cache = None
+            rv.cache_control.public = True
+
+        rv.cache_control.max_age = max_age
+        rv.expires = int(time() + max_age)  # type: ignore
+
+    if isinstance(etag, str):
+        rv.set_etag(etag)
+    elif etag and path is not None:
+        check = adler32(path.encode("utf-8")) & 0xFFFFFFFF
+        rv.set_etag(f"{mtime}-{size}-{check}")
+
+    if conditional:
+        try:
+            rv = rv.make_conditional(environ, accept_ranges=True, complete_length=size)
+        except RequestedRangeNotSatisfiable:
+            if file is not None:
+                file.close()
+
+            raise
+
+        # Some x-sendfile implementations incorrectly ignore the 304
+        # status code and send the file anyway.
+        if rv.status_code == 304:
+            rv.headers.pop("x-sendfile", None)
+
+    return rv
+
+
+def send_from_directory(
+    directory: t.Union[os.PathLike, str],
+    path: t.Union[os.PathLike, str],
+    environ: "WSGIEnvironment",
+    **kwargs: t.Any,
+) -> "Response":
+    """Send a file from within a directory using :func:`send_file`.
+
+    This is a secure way to serve files from a folder, such as static
+    files or uploads. Uses :func:`~werkzeug.security.safe_join` to
+    ensure the path coming from the client is not maliciously crafted to
+    point outside the specified directory.
+
+    If the final path does not point to an existing regular file,
+    returns a 404 :exc:`~werkzeug.exceptions.NotFound` error.
+
+    :param directory: The directory that ``path`` must be located under.
+    :param path: The path to the file to send, relative to
+        ``directory``.
+    :param environ: The WSGI environ for the current request.
+    :param kwargs: Arguments to pass to :func:`send_file`.
+
+    .. versionadded:: 2.0
+        Adapted from Flask's implementation.
+    """
+    path = safe_join(os.fspath(directory), os.fspath(path))
+
+    if path is None:
+        raise NotFound()
+
+    # Flask will pass app.root_path, allowing its send_from_directory
+    # wrapper to not have to deal with paths.
+    if "_root_path" in kwargs:
+        path = os.path.join(kwargs["_root_path"], path)
+
+    try:
+        if not os.path.isfile(path):
+            raise NotFound()
+    except ValueError:
+        # path contains null byte on Python < 3.8
+        raise NotFound() from None
+
+    return send_file(path, environ, **kwargs)
+
+
+def import_string(import_name: str, silent: bool = False) -> t.Any:
+    """Imports an object based on a string.  This is useful if you want to
+    use import paths as endpoints or something similar.  An import path can
+    be specified either in dotted notation (``xml.sax.saxutils.escape``)
+    or with a colon as object delimiter (``xml.sax.saxutils:escape``).
+
+    If `silent` is True the return value will be `None` if the import fails.
+
+    :param import_name: the dotted name for the object to import.
+    :param silent: if set to `True` import errors are ignored and
+                   `None` is returned instead.
+    :return: imported object
+    """
+    import_name = import_name.replace(":", ".")
+    try:
+        try:
+            __import__(import_name)
+        except ImportError:
+            if "." not in import_name:
+                raise
+        else:
+            return sys.modules[import_name]
+
+        module_name, obj_name = import_name.rsplit(".", 1)
+        module = __import__(module_name, globals(), locals(), [obj_name])
+        try:
+            return getattr(module, obj_name)
+        except AttributeError as e:
+            raise ImportError(e) from None
+
+    except ImportError as e:
+        if not silent:
+            raise ImportStringError(import_name, e).with_traceback(
+                sys.exc_info()[2]
+            ) from None
+
+    return None
+
+
+def find_modules(
+    import_path: str, include_packages: bool = False, recursive: bool = False
+) -> t.Iterator[str]:
+    """Finds all the modules below a package.  This can be useful to
+    automatically import all views / controllers so that their metaclasses /
+    function decorators have a chance to register themselves on the
+    application.
+
+    Packages are not returned unless `include_packages` is `True`.  This can
+    also recursively list modules but in that case it will import all the
+    packages to get the correct load path of that module.
+
+    :param import_path: the dotted name for the package to find child modules.
+    :param include_packages: set to `True` if packages should be returned, too.
+    :param recursive: set to `True` if recursion should happen.
+    :return: generator
+    """
+    module = import_string(import_path)
+    path = getattr(module, "__path__", None)
+    if path is None:
+        raise ValueError(f"{import_path!r} is not a package")
+    basename = f"{module.__name__}."
+    for _importer, modname, ispkg in pkgutil.iter_modules(path):
+        modname = basename + modname
+        if ispkg:
+            if include_packages:
+                yield modname
+            if recursive:
+                yield from find_modules(modname, include_packages, True)
+        else:
+            yield modname
+
+
+def validate_arguments(func, args, kwargs, drop_extra=True):  # type: ignore
+    """Checks if the function accepts the arguments and keyword arguments.
+    Returns a new ``(args, kwargs)`` tuple that can safely be passed to
+    the function without causing a `TypeError` because the function signature
+    is incompatible.  If `drop_extra` is set to `True` (which is the default)
+    any extra positional or keyword arguments are dropped automatically.
+
+    The exception raised provides three attributes:
+
+    `missing`
+        A set of argument names that the function expected but where
+        missing.
+
+    `extra`
+        A dict of keyword arguments that the function can not handle but
+        where provided.
+
+    `extra_positional`
+        A list of values that where given by positional argument but the
+        function cannot accept.
+
+    This can be useful for decorators that forward user submitted data to
+    a view function::
+
+        from werkzeug.utils import ArgumentValidationError, validate_arguments
+
+        def sanitize(f):
+            def proxy(request):
+                data = request.values.to_dict()
+                try:
+                    args, kwargs = validate_arguments(f, (request,), data)
+                except ArgumentValidationError:
+                    raise BadRequest('The browser failed to transmit all '
+                                     'the data expected.')
+                return f(*args, **kwargs)
+            return proxy
+
+    :param func: the function the validation is performed against.
+    :param args: a tuple of positional arguments.
+    :param kwargs: a dict of keyword arguments.
+    :param drop_extra: set to `False` if you don't want extra arguments
+                       to be silently dropped.
+    :return: tuple in the form ``(args, kwargs)``.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Use :func:`inspect.signature`
+        instead.
+    """
+    warnings.warn(
+        "'utils.validate_arguments' is deprecated and will be removed"
+        " in Werkzeug 2.1. Use 'inspect.signature' instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    parser = _parse_signature(func)
+    args, kwargs, missing, extra, extra_positional = parser(args, kwargs)[:5]
+    if missing:
+        raise ArgumentValidationError(tuple(missing))
+    elif (extra or extra_positional) and not drop_extra:
+        raise ArgumentValidationError(None, extra, extra_positional)
+    return tuple(args), kwargs
+
+
+def bind_arguments(func, args, kwargs):  # type: ignore
+    """Bind the arguments provided into a dict.  When passed a function,
+    a tuple of arguments and a dict of keyword arguments `bind_arguments`
+    returns a dict of names as the function would see it.  This can be useful
+    to implement a cache decorator that uses the function arguments to build
+    the cache key based on the values of the arguments.
+
+    :param func: the function the arguments should be bound for.
+    :param args: tuple of positional arguments.
+    :param kwargs: a dict of keyword arguments.
+    :return: a :class:`dict` of bound keyword arguments.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Use :meth:`Signature.bind`
+        instead.
+    """
+    warnings.warn(
+        "'utils.bind_arguments' is deprecated and will be removed in"
+        " Werkzeug 2.1. Use 'Signature.bind' instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    (
+        args,
+        kwargs,
+        missing,
+        extra,
+        extra_positional,
+        arg_spec,
+        vararg_var,
+        kwarg_var,
+    ) = _parse_signature(func)(args, kwargs)
+    values = {}
+    for (name, _has_default, _default), value in zip(arg_spec, args):
+        values[name] = value
+    if vararg_var is not None:
+        values[vararg_var] = tuple(extra_positional)
+    elif extra_positional:
+        raise TypeError("too many positional arguments")
+    if kwarg_var is not None:
+        multikw = set(extra) & {x[0] for x in arg_spec}
+        if multikw:
+            raise TypeError(
+                f"got multiple values for keyword argument {next(iter(multikw))!r}"
+            )
+        values[kwarg_var] = extra
+    elif extra:
+        raise TypeError(f"got unexpected keyword argument {next(iter(extra))!r}")
+    return values
+
+
+class ArgumentValidationError(ValueError):
+    """Raised if :func:`validate_arguments` fails to validate
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1 along with ``utils.bind`` and
+        ``validate_arguments``.
+    """
+
+    def __init__(self, missing=None, extra=None, extra_positional=None):  # type: ignore
+        self.missing = set(missing or ())
+        self.extra = extra or {}
+        self.extra_positional = extra_positional or []
+        super().__init__(
+            "function arguments invalid."
+            f" ({len(self.missing)} missing,"
+            f" {len(self.extra) + len(self.extra_positional)} additional)"
+        )
+
+
+class ImportStringError(ImportError):
+    """Provides information about a failed :func:`import_string` attempt."""
+
+    #: String in dotted notation that failed to be imported.
+    import_name: str
+    #: Wrapped exception.
+    exception: BaseException
+
+    def __init__(self, import_name: str, exception: BaseException) -> None:
+        self.import_name = import_name
+        self.exception = exception
+        msg = import_name
+        name = ""
+        tracked = []
+        for part in import_name.replace(":", ".").split("."):
+            name = f"{name}.{part}" if name else part
+            imported = import_string(name, silent=True)
+            if imported:
+                tracked.append((name, getattr(imported, "__file__", None)))
+            else:
+                track = [f"- {n!r} found in {i!r}." for n, i in tracked]
+                track.append(f"- {name!r} not found.")
+                track_str = "\n".join(track)
+                msg = (
+                    f"import_string() failed for {import_name!r}. Possible reasons"
+                    f" are:\n\n"
+                    "- missing __init__.py in a package;\n"
+                    "- package or module path not included in sys.path;\n"
+                    "- duplicated package or module name taking precedence in"
+                    " sys.path;\n"
+                    "- missing module, class, function or variable;\n\n"
+                    f"Debugged import:\n\n{track_str}\n\n"
+                    f"Original exception:\n\n{type(exception).__name__}: {exception}"
+                )
+                break
+
+        super().__init__(msg)
+
+    def __repr__(self) -> str:
+        return f"<{type(self).__name__}({self.import_name!r}, {self.exception!r})>"
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wrappers/__init__.py b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/__init__.py
new file mode 100644
index 0000000..eb69a99
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/__init__.py
@@ -0,0 +1,16 @@
+from .accept import AcceptMixin
+from .auth import AuthorizationMixin
+from .auth import WWWAuthenticateMixin
+from .base_request import BaseRequest
+from .base_response import BaseResponse
+from .common_descriptors import CommonRequestDescriptorsMixin
+from .common_descriptors import CommonResponseDescriptorsMixin
+from .etag import ETagRequestMixin
+from .etag import ETagResponseMixin
+from .request import PlainRequest
+from .request import Request as Request
+from .request import StreamOnlyMixin
+from .response import Response as Response
+from .response import ResponseStream
+from .response import ResponseStreamMixin
+from .user_agent import UserAgentMixin
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diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wrappers/__pycache__/response.cpython-36.pyc b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/__pycache__/response.cpython-36.pyc
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diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wrappers/accept.py b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/accept.py
new file mode 100644
index 0000000..9605e63
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/accept.py
@@ -0,0 +1,14 @@
+import typing as t
+import warnings
+
+
+class AcceptMixin:
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'AcceptMixin' is deprecated and will be removed in"
+            " Werkzeug 2.1. 'Request' now includes the functionality"
+            " directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)  # type: ignore
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wrappers/auth.py b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/auth.py
new file mode 100644
index 0000000..da31b7c
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/auth.py
@@ -0,0 +1,26 @@
+import typing as t
+import warnings
+
+
+class AuthorizationMixin:
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'AuthorizationMixin' is deprecated and will be removed in"
+            " Werkzeug 2.1. 'Request' now includes the functionality"
+            " directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)  # type: ignore
+
+
+class WWWAuthenticateMixin:
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'WWWAuthenticateMixin' is deprecated and will be removed"
+            " in Werkzeug 2.1. 'Response' now includes the"
+            " functionality directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)  # type: ignore
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wrappers/base_request.py b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/base_request.py
new file mode 100644
index 0000000..451989f
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/base_request.py
@@ -0,0 +1,36 @@
+import typing as t
+import warnings
+
+from .request import Request
+
+
+class _FakeSubclassCheck(type):
+    def __subclasscheck__(cls, subclass: t.Type) -> bool:
+        warnings.warn(
+            "'BaseRequest' is deprecated and will be removed in"
+            " Werkzeug 2.1. Use 'issubclass(cls, Request)' instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return issubclass(subclass, Request)
+
+    def __instancecheck__(cls, instance: t.Any) -> bool:
+        warnings.warn(
+            "'BaseRequest' is deprecated and will be removed in"
+            " Werkzeug 2.1. Use 'isinstance(obj, Request)' instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return isinstance(instance, Request)
+
+
+class BaseRequest(Request, metaclass=_FakeSubclassCheck):
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'BaseRequest' is deprecated and will be removed in"
+            " Werkzeug 2.1. 'Request' now includes the functionality"
+            " directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wrappers/base_response.py b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/base_response.py
new file mode 100644
index 0000000..3e0dc67
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/base_response.py
@@ -0,0 +1,36 @@
+import typing as t
+import warnings
+
+from .response import Response
+
+
+class _FakeSubclassCheck(type):
+    def __subclasscheck__(cls, subclass: t.Type) -> bool:
+        warnings.warn(
+            "'BaseResponse' is deprecated and will be removed in"
+            " Werkzeug 2.1. Use 'issubclass(cls, Response)' instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return issubclass(subclass, Response)
+
+    def __instancecheck__(cls, instance: t.Any) -> bool:
+        warnings.warn(
+            "'BaseResponse' is deprecated and will be removed in"
+            " Werkzeug 2.1. Use 'isinstance(obj, Response)' instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        return isinstance(instance, Response)
+
+
+class BaseResponse(Response, metaclass=_FakeSubclassCheck):
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'BaseResponse' is deprecated and will be removed in"
+            " Werkzeug 2.1. 'Response' now includes the functionality"
+            " directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wrappers/common_descriptors.py b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/common_descriptors.py
new file mode 100644
index 0000000..db87ea5
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/common_descriptors.py
@@ -0,0 +1,26 @@
+import typing as t
+import warnings
+
+
+class CommonRequestDescriptorsMixin:
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'CommonRequestDescriptorsMixin' is deprecated and will be"
+            " removed in Werkzeug 2.1. 'Request' now includes the"
+            " functionality directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)  # type: ignore
+
+
+class CommonResponseDescriptorsMixin:
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'CommonResponseDescriptorsMixin' is deprecated and will be"
+            " removed in Werkzeug 2.1. 'Response' now includes the"
+            " functionality directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)  # type: ignore
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wrappers/cors.py b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/cors.py
new file mode 100644
index 0000000..89cf83e
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/cors.py
@@ -0,0 +1,26 @@
+import typing as t
+import warnings
+
+
+class CORSRequestMixin:
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'CORSRequestMixin' is deprecated and will be removed in"
+            " Werkzeug 2.1. 'Request' now includes the functionality"
+            " directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)  # type: ignore
+
+
+class CORSResponseMixin:
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'CORSResponseMixin' is deprecated and will be removed in"
+            " Werkzeug 2.1. 'Response' now includes the functionality"
+            " directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)  # type: ignore
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wrappers/etag.py b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/etag.py
new file mode 100644
index 0000000..2e9015a
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/etag.py
@@ -0,0 +1,26 @@
+import typing as t
+import warnings
+
+
+class ETagRequestMixin:
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'ETagRequestMixin' is deprecated and will be removed in"
+            " Werkzeug 2.1. 'Request' now includes the functionality"
+            " directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)  # type: ignore
+
+
+class ETagResponseMixin:
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'ETagResponseMixin' is deprecated and will be removed in"
+            " Werkzeug 2.1. 'Response' now includes the functionality"
+            " directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)  # type: ignore
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wrappers/json.py b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/json.py
new file mode 100644
index 0000000..ab6ed7b
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/json.py
@@ -0,0 +1,13 @@
+import typing as t
+import warnings
+
+
+class JSONMixin:
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'JSONMixin' is deprecated and will be removed in Werkzeug"
+            " 2.1. 'Request' now includes the functionality directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)  # type: ignore
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wrappers/request.py b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/request.py
new file mode 100644
index 0000000..700cda0
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/request.py
@@ -0,0 +1,660 @@
+import functools
+import json
+import typing
+import typing as t
+import warnings
+from io import BytesIO
+
+from .._internal import _wsgi_decoding_dance
+from ..datastructures import CombinedMultiDict
+from ..datastructures import EnvironHeaders
+from ..datastructures import FileStorage
+from ..datastructures import ImmutableMultiDict
+from ..datastructures import iter_multi_items
+from ..datastructures import MultiDict
+from ..formparser import default_stream_factory
+from ..formparser import FormDataParser
+from ..sansio.request import Request as _SansIORequest
+from ..utils import cached_property
+from ..utils import environ_property
+from ..wsgi import _get_server
+from ..wsgi import get_input_stream
+from werkzeug.exceptions import BadRequest
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+
+
+class Request(_SansIORequest):
+    """Represents an incoming WSGI HTTP request, with headers and body
+    taken from the WSGI environment. Has properties and methods for
+    using the functionality defined by various HTTP specs. The data in
+    requests object is read-only.
+
+    Text data is assumed to use UTF-8 encoding, which should be true for
+    the vast majority of modern clients. Using an encoding set by the
+    client is unsafe in Python due to extra encodings it provides, such
+    as ``zip``. To change the assumed encoding, subclass and replace
+    :attr:`charset`.
+
+    :param environ: The WSGI environ is generated by the WSGI server and
+        contains information about the server configuration and client
+        request.
+    :param populate_request: Add this request object to the WSGI environ
+        as ``environ['werkzeug.request']``. Can be useful when
+        debugging.
+    :param shallow: Makes reading from :attr:`stream` (and any method
+        that would read from it) raise a :exc:`RuntimeError`. Useful to
+        prevent consuming the form data in middleware, which would make
+        it unavailable to the final application.
+
+    .. versionchanged:: 2.0
+        Combine ``BaseRequest`` and mixins into a single ``Request``
+        class. Using the old classes is deprecated and will be removed
+        in Werkzeug 2.1.
+
+    .. versionchanged:: 0.5
+        Read-only mode is enforced with immutable classes for all data.
+    """
+
+    #: the maximum content length.  This is forwarded to the form data
+    #: parsing function (:func:`parse_form_data`).  When set and the
+    #: :attr:`form` or :attr:`files` attribute is accessed and the
+    #: parsing fails because more than the specified value is transmitted
+    #: a :exc:`~werkzeug.exceptions.RequestEntityTooLarge` exception is raised.
+    #:
+    #: Have a look at :doc:`/request_data` for more details.
+    #:
+    #: .. versionadded:: 0.5
+    max_content_length: t.Optional[int] = None
+
+    #: the maximum form field size.  This is forwarded to the form data
+    #: parsing function (:func:`parse_form_data`).  When set and the
+    #: :attr:`form` or :attr:`files` attribute is accessed and the
+    #: data in memory for post data is longer than the specified value a
+    #: :exc:`~werkzeug.exceptions.RequestEntityTooLarge` exception is raised.
+    #:
+    #: Have a look at :doc:`/request_data` for more details.
+    #:
+    #: .. versionadded:: 0.5
+    max_form_memory_size: t.Optional[int] = None
+
+    #: The form data parser that shoud be used.  Can be replaced to customize
+    #: the form date parsing.
+    form_data_parser_class: t.Type[FormDataParser] = FormDataParser
+
+    #: Disable the :attr:`data` property to avoid reading from the input
+    #: stream.
+    #:
+    #: .. deprecated:: 2.0
+    #:     Will be removed in Werkzeug 2.1. Create the request with
+    #:     ``shallow=True`` instead.
+    #:
+    #: .. versionadded:: 0.9
+    disable_data_descriptor: t.Optional[bool] = None
+
+    #: The WSGI environment containing HTTP headers and information from
+    #: the WSGI server.
+    environ: "WSGIEnvironment"
+
+    #: Set when creating the request object. If ``True``, reading from
+    #: the request body will cause a ``RuntimeException``. Useful to
+    #: prevent modifying the stream from middleware.
+    shallow: bool
+
+    def __init__(
+        self,
+        environ: "WSGIEnvironment",
+        populate_request: bool = True,
+        shallow: bool = False,
+    ) -> None:
+        super().__init__(
+            method=environ.get("REQUEST_METHOD", "GET"),
+            scheme=environ.get("wsgi.url_scheme", "http"),
+            server=_get_server(environ),
+            root_path=_wsgi_decoding_dance(
+                environ.get("SCRIPT_NAME") or "", self.charset, self.encoding_errors
+            ),
+            path=_wsgi_decoding_dance(
+                environ.get("PATH_INFO") or "", self.charset, self.encoding_errors
+            ),
+            query_string=environ.get("QUERY_STRING", "").encode("latin1"),
+            headers=EnvironHeaders(environ),
+            remote_addr=environ.get("REMOTE_ADDR"),
+        )
+        self.environ = environ
+
+        if self.disable_data_descriptor is not None:
+            warnings.warn(
+                "'disable_data_descriptor' is deprecated and will be"
+                " removed in Werkzeug 2.1. Create the request with"
+                " 'shallow=True' instead.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+            shallow = shallow or self.disable_data_descriptor
+
+        self.shallow = shallow
+
+        if populate_request and not shallow:
+            self.environ["werkzeug.request"] = self
+
+    @classmethod
+    def from_values(cls, *args: t.Any, **kwargs: t.Any) -> "Request":
+        """Create a new request object based on the values provided.  If
+        environ is given missing values are filled from there.  This method is
+        useful for small scripts when you need to simulate a request from an URL.
+        Do not use this method for unittesting, there is a full featured client
+        object (:class:`Client`) that allows to create multipart requests,
+        support for cookies etc.
+
+        This accepts the same options as the
+        :class:`~werkzeug.test.EnvironBuilder`.
+
+        .. versionchanged:: 0.5
+           This method now accepts the same arguments as
+           :class:`~werkzeug.test.EnvironBuilder`.  Because of this the
+           `environ` parameter is now called `environ_overrides`.
+
+        :return: request object
+        """
+        from ..test import EnvironBuilder
+
+        charset = kwargs.pop("charset", cls.charset)
+        kwargs["charset"] = charset
+        builder = EnvironBuilder(*args, **kwargs)
+        try:
+            return builder.get_request(cls)
+        finally:
+            builder.close()
+
+    @classmethod
+    def application(
+        cls, f: t.Callable[["Request"], "WSGIApplication"]
+    ) -> "WSGIApplication":
+        """Decorate a function as responder that accepts the request as
+        the last argument.  This works like the :func:`responder`
+        decorator but the function is passed the request object as the
+        last argument and the request object will be closed
+        automatically::
+
+            @Request.application
+            def my_wsgi_app(request):
+                return Response('Hello World!')
+
+        As of Werkzeug 0.14 HTTP exceptions are automatically caught and
+        converted to responses instead of failing.
+
+        :param f: the WSGI callable to decorate
+        :return: a new WSGI callable
+        """
+        #: return a callable that wraps the -2nd argument with the request
+        #: and calls the function with all the arguments up to that one and
+        #: the request.  The return value is then called with the latest
+        #: two arguments.  This makes it possible to use this decorator for
+        #: both standalone WSGI functions as well as bound methods and
+        #: partially applied functions.
+        from ..exceptions import HTTPException
+
+        @functools.wraps(f)
+        def application(*args):  # type: ignore
+            request = cls(args[-2])
+            with request:
+                try:
+                    resp = f(*args[:-2] + (request,))
+                except HTTPException as e:
+                    resp = e.get_response(args[-2])
+                return resp(*args[-2:])
+
+        return t.cast("WSGIApplication", application)
+
+    def _get_file_stream(
+        self,
+        total_content_length: t.Optional[int],
+        content_type: t.Optional[str],
+        filename: t.Optional[str] = None,
+        content_length: t.Optional[int] = None,
+    ) -> t.IO[bytes]:
+        """Called to get a stream for the file upload.
+
+        This must provide a file-like class with `read()`, `readline()`
+        and `seek()` methods that is both writeable and readable.
+
+        The default implementation returns a temporary file if the total
+        content length is higher than 500KB.  Because many browsers do not
+        provide a content length for the files only the total content
+        length matters.
+
+        :param total_content_length: the total content length of all the
+                                     data in the request combined.  This value
+                                     is guaranteed to be there.
+        :param content_type: the mimetype of the uploaded file.
+        :param filename: the filename of the uploaded file.  May be `None`.
+        :param content_length: the length of this file.  This value is usually
+                               not provided because webbrowsers do not provide
+                               this value.
+        """
+        return default_stream_factory(
+            total_content_length=total_content_length,
+            filename=filename,
+            content_type=content_type,
+            content_length=content_length,
+        )
+
+    @property
+    def want_form_data_parsed(self) -> bool:
+        """``True`` if the request method carries content. By default
+        this is true if a ``Content-Type`` is sent.
+
+        .. versionadded:: 0.8
+        """
+        return bool(self.environ.get("CONTENT_TYPE"))
+
+    def make_form_data_parser(self) -> FormDataParser:
+        """Creates the form data parser. Instantiates the
+        :attr:`form_data_parser_class` with some parameters.
+
+        .. versionadded:: 0.8
+        """
+        return self.form_data_parser_class(
+            self._get_file_stream,
+            self.charset,
+            self.encoding_errors,
+            self.max_form_memory_size,
+            self.max_content_length,
+            self.parameter_storage_class,
+        )
+
+    def _load_form_data(self) -> None:
+        """Method used internally to retrieve submitted data.  After calling
+        this sets `form` and `files` on the request object to multi dicts
+        filled with the incoming form data.  As a matter of fact the input
+        stream will be empty afterwards.  You can also call this method to
+        force the parsing of the form data.
+
+        .. versionadded:: 0.8
+        """
+        # abort early if we have already consumed the stream
+        if "form" in self.__dict__:
+            return
+
+        if self.want_form_data_parsed:
+            parser = self.make_form_data_parser()
+            data = parser.parse(
+                self._get_stream_for_parsing(),
+                self.mimetype,
+                self.content_length,
+                self.mimetype_params,
+            )
+        else:
+            data = (
+                self.stream,
+                self.parameter_storage_class(),
+                self.parameter_storage_class(),
+            )
+
+        # inject the values into the instance dict so that we bypass
+        # our cached_property non-data descriptor.
+        d = self.__dict__
+        d["stream"], d["form"], d["files"] = data
+
+    def _get_stream_for_parsing(self) -> t.IO[bytes]:
+        """This is the same as accessing :attr:`stream` with the difference
+        that if it finds cached data from calling :meth:`get_data` first it
+        will create a new stream out of the cached data.
+
+        .. versionadded:: 0.9.3
+        """
+        cached_data = getattr(self, "_cached_data", None)
+        if cached_data is not None:
+            return BytesIO(cached_data)
+        return self.stream
+
+    def close(self) -> None:
+        """Closes associated resources of this request object.  This
+        closes all file handles explicitly.  You can also use the request
+        object in a with statement which will automatically close it.
+
+        .. versionadded:: 0.9
+        """
+        files = self.__dict__.get("files")
+        for _key, value in iter_multi_items(files or ()):
+            value.close()
+
+    def __enter__(self) -> "Request":
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb) -> None:  # type: ignore
+        self.close()
+
+    @cached_property
+    def stream(self) -> t.IO[bytes]:
+        """
+        If the incoming form data was not encoded with a known mimetype
+        the data is stored unmodified in this stream for consumption.  Most
+        of the time it is a better idea to use :attr:`data` which will give
+        you that data as a string.  The stream only returns the data once.
+
+        Unlike :attr:`input_stream` this stream is properly guarded that you
+        can't accidentally read past the length of the input.  Werkzeug will
+        internally always refer to this stream to read data which makes it
+        possible to wrap this object with a stream that does filtering.
+
+        .. versionchanged:: 0.9
+           This stream is now always available but might be consumed by the
+           form parser later on.  Previously the stream was only set if no
+           parsing happened.
+        """
+        if self.shallow:
+            raise RuntimeError(
+                "This request was created with 'shallow=True', reading"
+                " from the input stream is disabled."
+            )
+
+        return get_input_stream(self.environ)
+
+    input_stream = environ_property[t.IO[bytes]](
+        "wsgi.input",
+        doc="""The WSGI input stream.
+
+        In general it's a bad idea to use this one because you can
+        easily read past the boundary.  Use the :attr:`stream`
+        instead.""",
+    )
+
+    @cached_property
+    def data(self) -> bytes:
+        """
+        Contains the incoming request data as string in case it came with
+        a mimetype Werkzeug does not handle.
+        """
+        return self.get_data(parse_form_data=True)
+
+    @typing.overload
+    def get_data(  # type: ignore
+        self,
+        cache: bool = True,
+        as_text: "te.Literal[False]" = False,
+        parse_form_data: bool = False,
+    ) -> bytes:
+        ...
+
+    @typing.overload
+    def get_data(
+        self,
+        cache: bool = True,
+        as_text: "te.Literal[True]" = ...,
+        parse_form_data: bool = False,
+    ) -> str:
+        ...
+
+    def get_data(
+        self, cache: bool = True, as_text: bool = False, parse_form_data: bool = False
+    ) -> t.Union[bytes, str]:
+        """This reads the buffered incoming data from the client into one
+        bytes object.  By default this is cached but that behavior can be
+        changed by setting `cache` to `False`.
+
+        Usually it's a bad idea to call this method without checking the
+        content length first as a client could send dozens of megabytes or more
+        to cause memory problems on the server.
+
+        Note that if the form data was already parsed this method will not
+        return anything as form data parsing does not cache the data like
+        this method does.  To implicitly invoke form data parsing function
+        set `parse_form_data` to `True`.  When this is done the return value
+        of this method will be an empty string if the form parser handles
+        the data.  This generally is not necessary as if the whole data is
+        cached (which is the default) the form parser will used the cached
+        data to parse the form data.  Please be generally aware of checking
+        the content length first in any case before calling this method
+        to avoid exhausting server memory.
+
+        If `as_text` is set to `True` the return value will be a decoded
+        string.
+
+        .. versionadded:: 0.9
+        """
+        rv = getattr(self, "_cached_data", None)
+        if rv is None:
+            if parse_form_data:
+                self._load_form_data()
+            rv = self.stream.read()
+            if cache:
+                self._cached_data = rv
+        if as_text:
+            rv = rv.decode(self.charset, self.encoding_errors)
+        return rv  # type: ignore
+
+    @cached_property
+    def form(self) -> "ImmutableMultiDict[str, str]":
+        """The form parameters.  By default an
+        :class:`~werkzeug.datastructures.ImmutableMultiDict`
+        is returned from this function.  This can be changed by setting
+        :attr:`parameter_storage_class` to a different type.  This might
+        be necessary if the order of the form data is important.
+
+        Please keep in mind that file uploads will not end up here, but instead
+        in the :attr:`files` attribute.
+
+        .. versionchanged:: 0.9
+
+            Previous to Werkzeug 0.9 this would only contain form data for POST
+            and PUT requests.
+        """
+        self._load_form_data()
+        return self.form
+
+    @cached_property
+    def values(self) -> "CombinedMultiDict[str, str]":
+        """A :class:`werkzeug.datastructures.CombinedMultiDict` that
+        combines :attr:`args` and :attr:`form`.
+
+        For GET requests, only ``args`` are present, not ``form``.
+
+        .. versionchanged:: 2.0
+            For GET requests, only ``args`` are present, not ``form``.
+        """
+        sources = [self.args]
+
+        if self.method != "GET":
+            # GET requests can have a body, and some caching proxies
+            # might not treat that differently than a normal GET
+            # request, allowing form data to "invisibly" affect the
+            # cache without indication in the query string / URL.
+            sources.append(self.form)
+
+        args = []
+
+        for d in sources:
+            if not isinstance(d, MultiDict):
+                d = MultiDict(d)
+
+            args.append(d)
+
+        return CombinedMultiDict(args)
+
+    @cached_property
+    def files(self) -> "ImmutableMultiDict[str, FileStorage]":
+        """:class:`~werkzeug.datastructures.MultiDict` object containing
+        all uploaded files.  Each key in :attr:`files` is the name from the
+        ````.  Each value in :attr:`files` is a
+        Werkzeug :class:`~werkzeug.datastructures.FileStorage` object.
+
+        It basically behaves like a standard file object you know from Python,
+        with the difference that it also has a
+        :meth:`~werkzeug.datastructures.FileStorage.save` function that can
+        store the file on the filesystem.
+
+        Note that :attr:`files` will only contain data if the request method was
+        POST, PUT or PATCH and the ``
    `` that posted to the request had
+        ``enctype="multipart/form-data"``.  It will be empty otherwise.
+
+        See the :class:`~werkzeug.datastructures.MultiDict` /
+        :class:`~werkzeug.datastructures.FileStorage` documentation for
+        more details about the used data structure.
+        """
+        self._load_form_data()
+        return self.files
+
+    @property
+    def script_root(self) -> str:
+        """Alias for :attr:`self.root_path`. ``environ["SCRIPT_ROOT"]``
+        without a trailing slash.
+        """
+        return self.root_path
+
+    @cached_property
+    def url_root(self) -> str:
+        """Alias for :attr:`root_url`. The URL with scheme, host, and
+        root path. For example, ``https://example.com/app/``.
+        """
+        return self.root_url
+
+    remote_user = environ_property[str](
+        "REMOTE_USER",
+        doc="""If the server supports user authentication, and the
+        script is protected, this attribute contains the username the
+        user has authenticated as.""",
+    )
+    is_multithread = environ_property[bool](
+        "wsgi.multithread",
+        doc="""boolean that is `True` if the application is served by a
+        multithreaded WSGI server.""",
+    )
+    is_multiprocess = environ_property[bool](
+        "wsgi.multiprocess",
+        doc="""boolean that is `True` if the application is served by a
+        WSGI server that spawns multiple processes.""",
+    )
+    is_run_once = environ_property[bool](
+        "wsgi.run_once",
+        doc="""boolean that is `True` if the application will be
+        executed only once in a process lifetime.  This is the case for
+        CGI for example, but it's not guaranteed that the execution only
+        happens one time.""",
+    )
+
+    # JSON
+
+    #: A module or other object that has ``dumps`` and ``loads``
+    #: functions that match the API of the built-in :mod:`json` module.
+    json_module = json
+
+    @property
+    def json(self) -> t.Optional[t.Any]:
+        """The parsed JSON data if :attr:`mimetype` indicates JSON
+        (:mimetype:`application/json`, see :attr:`is_json`).
+
+        Calls :meth:`get_json` with default arguments.
+        """
+        return self.get_json()
+
+    # Cached values for ``(silent=False, silent=True)``. Initialized
+    # with sentinel values.
+    _cached_json: t.Tuple[t.Any, t.Any] = (Ellipsis, Ellipsis)
+
+    def get_json(
+        self, force: bool = False, silent: bool = False, cache: bool = True
+    ) -> t.Optional[t.Any]:
+        """Parse :attr:`data` as JSON.
+
+        If the mimetype does not indicate JSON
+        (:mimetype:`application/json`, see :attr:`is_json`), this
+        returns ``None``.
+
+        If parsing fails, :meth:`on_json_loading_failed` is called and
+        its return value is used as the return value.
+
+        :param force: Ignore the mimetype and always try to parse JSON.
+        :param silent: Silence parsing errors and return ``None``
+            instead.
+        :param cache: Store the parsed JSON to return for subsequent
+            calls.
+        """
+        if cache and self._cached_json[silent] is not Ellipsis:
+            return self._cached_json[silent]
+
+        if not (force or self.is_json):
+            return None
+
+        data = self.get_data(cache=cache)
+
+        try:
+            rv = self.json_module.loads(data)
+        except ValueError as e:
+            if silent:
+                rv = None
+
+                if cache:
+                    normal_rv, _ = self._cached_json
+                    self._cached_json = (normal_rv, rv)
+            else:
+                rv = self.on_json_loading_failed(e)
+
+                if cache:
+                    _, silent_rv = self._cached_json
+                    self._cached_json = (rv, silent_rv)
+        else:
+            if cache:
+                self._cached_json = (rv, rv)
+
+        return rv
+
+    def on_json_loading_failed(self, e: ValueError) -> t.Any:
+        """Called if :meth:`get_json` parsing fails and isn't silenced.
+        If this method returns a value, it is used as the return value
+        for :meth:`get_json`. The default implementation raises
+        :exc:`~werkzeug.exceptions.BadRequest`.
+        """
+        raise BadRequest(f"Failed to decode JSON object: {e}")
+
+
+class StreamOnlyMixin:
+    """Mixin to create a ``Request`` that disables the ``data``,
+    ``form``, and ``files`` properties. Only ``stream`` is available.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Create the request with
+        ``shallow=True`` instead.
+
+    .. versionadded:: 0.9
+    """
+
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'StreamOnlyMixin' is deprecated and will be removed in"
+            " Werkzeug 2.1. Create the request with 'shallow=True'"
+            " instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        kwargs["shallow"] = True
+        super().__init__(*args, **kwargs)  # type: ignore
+
+
+class PlainRequest(StreamOnlyMixin, Request):
+    """A request object without ``data``, ``form``, and ``files``.
+
+    .. deprecated:: 2.0
+        Will be removed in Werkzeug 2.1. Create the request with
+        ``shallow=True`` instead.
+
+    .. versionadded:: 0.9
+    """
+
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'PlainRequest' is deprecated and will be removed in"
+            " Werkzeug 2.1. Create the request with 'shallow=True'"
+            " instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+
+        # Don't show the DeprecationWarning for StreamOnlyMixin.
+        with warnings.catch_warnings():
+            warnings.simplefilter("ignore", DeprecationWarning)
+            super().__init__(*args, **kwargs)
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wrappers/response.py b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/response.py
new file mode 100644
index 0000000..d365c4e
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/response.py
@@ -0,0 +1,890 @@
+import json
+import typing
+import typing as t
+import warnings
+from http import HTTPStatus
+
+from .._internal import _to_bytes
+from ..datastructures import Headers
+from ..http import remove_entity_headers
+from ..sansio.response import Response as _SansIOResponse
+from ..urls import iri_to_uri
+from ..urls import url_join
+from ..utils import cached_property
+from ..wsgi import ClosingIterator
+from ..wsgi import get_current_url
+from werkzeug._internal import _get_environ
+from werkzeug.http import generate_etag
+from werkzeug.http import http_date
+from werkzeug.http import is_resource_modified
+from werkzeug.http import parse_etags
+from werkzeug.http import parse_range_header
+from werkzeug.wsgi import _RangeWrapper
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from _typeshed.wsgi import StartResponse
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+
+
+def _warn_if_string(iterable: t.Iterable) -> None:
+    """Helper for the response objects to check if the iterable returned
+    to the WSGI server is not a string.
+    """
+    if isinstance(iterable, str):
+        warnings.warn(
+            "Response iterable was set to a string. This will appear to"
+            " work but means that the server will send the data to the"
+            " client one character at a time. This is almost never"
+            " intended behavior, use 'response.data' to assign strings"
+            " to the response object.",
+            stacklevel=2,
+        )
+
+
+def _iter_encoded(
+    iterable: t.Iterable[t.Union[str, bytes]], charset: str
+) -> t.Iterator[bytes]:
+    for item in iterable:
+        if isinstance(item, str):
+            yield item.encode(charset)
+        else:
+            yield item
+
+
+def _clean_accept_ranges(accept_ranges: t.Union[bool, str]) -> str:
+    if accept_ranges is True:
+        return "bytes"
+    elif accept_ranges is False:
+        return "none"
+    elif isinstance(accept_ranges, str):
+        return accept_ranges
+    raise ValueError("Invalid accept_ranges value")
+
+
+class Response(_SansIOResponse):
+    """Represents an outgoing WSGI HTTP response with body, status, and
+    headers. Has properties and methods for using the functionality
+    defined by various HTTP specs.
+
+    The response body is flexible to support different use cases. The
+    simple form is passing bytes, or a string which will be encoded as
+    UTF-8. Passing an iterable of bytes or strings makes this a
+    streaming response. A generator is particularly useful for building
+    a CSV file in memory or using SSE (Server Sent Events). A file-like
+    object is also iterable, although the
+    :func:`~werkzeug.utils.send_file` helper should be used in that
+    case.
+
+    The response object is itself a WSGI application callable. When
+    called (:meth:`__call__`) with ``environ`` and ``start_response``,
+    it will pass its status and headers to ``start_response`` then
+    return its body as an iterable.
+
+    .. code-block:: python
+
+        from werkzeug.wrappers.response import Response
+
+        def index():
+            return Response("Hello, World!")
+
+        def application(environ, start_response):
+            path = environ.get("PATH_INFO") or "/"
+
+            if path == "/":
+                response = index()
+            else:
+                response = Response("Not Found", status=404)
+
+            return response(environ, start_response)
+
+    :param response: The data for the body of the response. A string or
+        bytes, or tuple or list of strings or bytes, for a fixed-length
+        response, or any other iterable of strings or bytes for a
+        streaming response. Defaults to an empty body.
+    :param status: The status code for the response. Either an int, in
+        which case the default status message is added, or a string in
+        the form ``{code} {message}``, like ``404 Not Found``. Defaults
+        to 200.
+    :param headers: A :class:`~werkzeug.datastructures.Headers` object,
+        or a list of ``(key, value)`` tuples that will be converted to a
+        ``Headers`` object.
+    :param mimetype: The mime type (content type without charset or
+        other parameters) of the response. If the value starts with
+        ``text/`` (or matches some other special cases), the charset
+        will be added to create the ``content_type``.
+    :param content_type: The full content type of the response.
+        Overrides building the value from ``mimetype``.
+    :param direct_passthrough: Pass the response body directly through
+        as the WSGI iterable. This can be used when the body is a binary
+        file or other iterator of bytes, to skip some unnecessary
+        checks. Use :func:`~werkzeug.utils.send_file` instead of setting
+        this manually.
+
+    .. versionchanged:: 2.0
+        Combine ``BaseResponse`` and mixins into a single ``Response``
+        class. Using the old classes is deprecated and will be removed
+        in Werkzeug 2.1.
+
+    .. versionchanged:: 0.5
+        The ``direct_passthrough`` parameter was added.
+    """
+
+    #: if set to `False` accessing properties on the response object will
+    #: not try to consume the response iterator and convert it into a list.
+    #:
+    #: .. versionadded:: 0.6.2
+    #:
+    #:    That attribute was previously called `implicit_seqence_conversion`.
+    #:    (Notice the typo).  If you did use this feature, you have to adapt
+    #:    your code to the name change.
+    implicit_sequence_conversion = True
+
+    #: Should this response object correct the location header to be RFC
+    #: conformant?  This is true by default.
+    #:
+    #: .. versionadded:: 0.8
+    autocorrect_location_header = True
+
+    #: Should this response object automatically set the content-length
+    #: header if possible?  This is true by default.
+    #:
+    #: .. versionadded:: 0.8
+    automatically_set_content_length = True
+
+    #: The response body to send as the WSGI iterable. A list of strings
+    #: or bytes represents a fixed-length response, any other iterable
+    #: is a streaming response. Strings are encoded to bytes as UTF-8.
+    #:
+    #: Do not set to a plain string or bytes, that will cause sending
+    #: the response to be very inefficient as it will iterate one byte
+    #: at a time.
+    response: t.Union[t.Iterable[str], t.Iterable[bytes]]
+
+    def __init__(
+        self,
+        response: t.Optional[
+            t.Union[t.Iterable[bytes], bytes, t.Iterable[str], str]
+        ] = None,
+        status: t.Optional[t.Union[int, str, HTTPStatus]] = None,
+        headers: t.Optional[
+            t.Union[
+                t.Mapping[str, t.Union[str, int, t.Iterable[t.Union[str, int]]]],
+                t.Iterable[t.Tuple[str, t.Union[str, int]]],
+            ]
+        ] = None,
+        mimetype: t.Optional[str] = None,
+        content_type: t.Optional[str] = None,
+        direct_passthrough: bool = False,
+    ) -> None:
+        super().__init__(
+            status=status,
+            headers=headers,
+            mimetype=mimetype,
+            content_type=content_type,
+        )
+
+        #: Pass the response body directly through as the WSGI iterable.
+        #: This can be used when the body is a binary file or other
+        #: iterator of bytes, to skip some unnecessary checks. Use
+        #: :func:`~werkzeug.utils.send_file` instead of setting this
+        #: manually.
+        self.direct_passthrough = direct_passthrough
+        self._on_close: t.List[t.Callable[[], t.Any]] = []
+
+        # we set the response after the headers so that if a class changes
+        # the charset attribute, the data is set in the correct charset.
+        if response is None:
+            self.response = []
+        elif isinstance(response, (str, bytes, bytearray)):
+            self.set_data(response)
+        else:
+            self.response = response
+
+    def call_on_close(self, func: t.Callable[[], t.Any]) -> t.Callable[[], t.Any]:
+        """Adds a function to the internal list of functions that should
+        be called as part of closing down the response.  Since 0.7 this
+        function also returns the function that was passed so that this
+        can be used as a decorator.
+
+        .. versionadded:: 0.6
+        """
+        self._on_close.append(func)
+        return func
+
+    def __repr__(self) -> str:
+        if self.is_sequence:
+            body_info = f"{sum(map(len, self.iter_encoded()))} bytes"
+        else:
+            body_info = "streamed" if self.is_streamed else "likely-streamed"
+        return f"<{type(self).__name__} {body_info} [{self.status}]>"
+
+    @classmethod
+    def force_type(
+        cls, response: "Response", environ: t.Optional["WSGIEnvironment"] = None
+    ) -> "Response":
+        """Enforce that the WSGI response is a response object of the current
+        type.  Werkzeug will use the :class:`Response` internally in many
+        situations like the exceptions.  If you call :meth:`get_response` on an
+        exception you will get back a regular :class:`Response` object, even
+        if you are using a custom subclass.
+
+        This method can enforce a given response type, and it will also
+        convert arbitrary WSGI callables into response objects if an environ
+        is provided::
+
+            # convert a Werkzeug response object into an instance of the
+            # MyResponseClass subclass.
+            response = MyResponseClass.force_type(response)
+
+            # convert any WSGI application into a response object
+            response = MyResponseClass.force_type(response, environ)
+
+        This is especially useful if you want to post-process responses in
+        the main dispatcher and use functionality provided by your subclass.
+
+        Keep in mind that this will modify response objects in place if
+        possible!
+
+        :param response: a response object or wsgi application.
+        :param environ: a WSGI environment object.
+        :return: a response object.
+        """
+        if not isinstance(response, Response):
+            if environ is None:
+                raise TypeError(
+                    "cannot convert WSGI application into response"
+                    " objects without an environ"
+                )
+
+            from ..test import run_wsgi_app
+
+            response = Response(*run_wsgi_app(response, environ))
+
+        response.__class__ = cls
+        return response
+
+    @classmethod
+    def from_app(
+        cls, app: "WSGIApplication", environ: "WSGIEnvironment", buffered: bool = False
+    ) -> "Response":
+        """Create a new response object from an application output.  This
+        works best if you pass it an application that returns a generator all
+        the time.  Sometimes applications may use the `write()` callable
+        returned by the `start_response` function.  This tries to resolve such
+        edge cases automatically.  But if you don't get the expected output
+        you should set `buffered` to `True` which enforces buffering.
+
+        :param app: the WSGI application to execute.
+        :param environ: the WSGI environment to execute against.
+        :param buffered: set to `True` to enforce buffering.
+        :return: a response object.
+        """
+        from ..test import run_wsgi_app
+
+        return cls(*run_wsgi_app(app, environ, buffered))
+
+    @typing.overload
+    def get_data(self, as_text: "te.Literal[False]" = False) -> bytes:
+        ...
+
+    @typing.overload
+    def get_data(self, as_text: "te.Literal[True]") -> str:
+        ...
+
+    def get_data(self, as_text: bool = False) -> t.Union[bytes, str]:
+        """The string representation of the response body.  Whenever you call
+        this property the response iterable is encoded and flattened.  This
+        can lead to unwanted behavior if you stream big data.
+
+        This behavior can be disabled by setting
+        :attr:`implicit_sequence_conversion` to `False`.
+
+        If `as_text` is set to `True` the return value will be a decoded
+        string.
+
+        .. versionadded:: 0.9
+        """
+        self._ensure_sequence()
+        rv = b"".join(self.iter_encoded())
+
+        if as_text:
+            return rv.decode(self.charset)
+
+        return rv
+
+    def set_data(self, value: t.Union[bytes, str]) -> None:
+        """Sets a new string as response.  The value must be a string or
+        bytes. If a string is set it's encoded to the charset of the
+        response (utf-8 by default).
+
+        .. versionadded:: 0.9
+        """
+        # if a string is set, it's encoded directly so that we
+        # can set the content length
+        if isinstance(value, str):
+            value = value.encode(self.charset)
+        else:
+            value = bytes(value)
+        self.response = [value]
+        if self.automatically_set_content_length:
+            self.headers["Content-Length"] = str(len(value))
+
+    data = property(
+        get_data,
+        set_data,
+        doc="A descriptor that calls :meth:`get_data` and :meth:`set_data`.",
+    )
+
+    def calculate_content_length(self) -> t.Optional[int]:
+        """Returns the content length if available or `None` otherwise."""
+        try:
+            self._ensure_sequence()
+        except RuntimeError:
+            return None
+        return sum(len(x) for x in self.iter_encoded())
+
+    def _ensure_sequence(self, mutable: bool = False) -> None:
+        """This method can be called by methods that need a sequence.  If
+        `mutable` is true, it will also ensure that the response sequence
+        is a standard Python list.
+
+        .. versionadded:: 0.6
+        """
+        if self.is_sequence:
+            # if we need a mutable object, we ensure it's a list.
+            if mutable and not isinstance(self.response, list):
+                self.response = list(self.response)  # type: ignore
+            return
+        if self.direct_passthrough:
+            raise RuntimeError(
+                "Attempted implicit sequence conversion but the"
+                " response object is in direct passthrough mode."
+            )
+        if not self.implicit_sequence_conversion:
+            raise RuntimeError(
+                "The response object required the iterable to be a"
+                " sequence, but the implicit conversion was disabled."
+                " Call make_sequence() yourself."
+            )
+        self.make_sequence()
+
+    def make_sequence(self) -> None:
+        """Converts the response iterator in a list.  By default this happens
+        automatically if required.  If `implicit_sequence_conversion` is
+        disabled, this method is not automatically called and some properties
+        might raise exceptions.  This also encodes all the items.
+
+        .. versionadded:: 0.6
+        """
+        if not self.is_sequence:
+            # if we consume an iterable we have to ensure that the close
+            # method of the iterable is called if available when we tear
+            # down the response
+            close = getattr(self.response, "close", None)
+            self.response = list(self.iter_encoded())
+            if close is not None:
+                self.call_on_close(close)
+
+    def iter_encoded(self) -> t.Iterator[bytes]:
+        """Iter the response encoded with the encoding of the response.
+        If the response object is invoked as WSGI application the return
+        value of this method is used as application iterator unless
+        :attr:`direct_passthrough` was activated.
+        """
+        if __debug__:
+            _warn_if_string(self.response)
+        # Encode in a separate function so that self.response is fetched
+        # early.  This allows us to wrap the response with the return
+        # value from get_app_iter or iter_encoded.
+        return _iter_encoded(self.response, self.charset)
+
+    @property
+    def is_streamed(self) -> bool:
+        """If the response is streamed (the response is not an iterable with
+        a length information) this property is `True`.  In this case streamed
+        means that there is no information about the number of iterations.
+        This is usually `True` if a generator is passed to the response object.
+
+        This is useful for checking before applying some sort of post
+        filtering that should not take place for streamed responses.
+        """
+        try:
+            len(self.response)  # type: ignore
+        except (TypeError, AttributeError):
+            return True
+        return False
+
+    @property
+    def is_sequence(self) -> bool:
+        """If the iterator is buffered, this property will be `True`.  A
+        response object will consider an iterator to be buffered if the
+        response attribute is a list or tuple.
+
+        .. versionadded:: 0.6
+        """
+        return isinstance(self.response, (tuple, list))
+
+    def close(self) -> None:
+        """Close the wrapped response if possible.  You can also use the object
+        in a with statement which will automatically close it.
+
+        .. versionadded:: 0.9
+           Can now be used in a with statement.
+        """
+        if hasattr(self.response, "close"):
+            self.response.close()  # type: ignore
+        for func in self._on_close:
+            func()
+
+    def __enter__(self) -> "Response":
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):  # type: ignore
+        self.close()
+
+    def freeze(self, no_etag: None = None) -> None:
+        """Make the response object ready to be pickled. Does the
+        following:
+
+        *   Buffer the response into a list, ignoring
+            :attr:`implicity_sequence_conversion` and
+            :attr:`direct_passthrough`.
+        *   Set the ``Content-Length`` header.
+        *   Generate an ``ETag`` header if one is not already set.
+
+        .. versionchanged:: 2.0
+            An ``ETag`` header is added, the ``no_etag`` parameter is
+            deprecated and will be removed in Werkzeug 2.1.
+
+        .. versionchanged:: 0.6
+            The ``Content-Length`` header is set.
+        """
+        # Always freeze the encoded response body, ignore
+        # implicit_sequence_conversion and direct_passthrough.
+        self.response = list(self.iter_encoded())
+        self.headers["Content-Length"] = str(sum(map(len, self.response)))
+
+        if no_etag is not None:
+            warnings.warn(
+                "The 'no_etag' parameter is deprecated and will be"
+                " removed in Werkzeug 2.1.",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+
+        self.add_etag()
+
+    def get_wsgi_headers(self, environ: "WSGIEnvironment") -> Headers:
+        """This is automatically called right before the response is started
+        and returns headers modified for the given environment.  It returns a
+        copy of the headers from the response with some modifications applied
+        if necessary.
+
+        For example the location header (if present) is joined with the root
+        URL of the environment.  Also the content length is automatically set
+        to zero here for certain status codes.
+
+        .. versionchanged:: 0.6
+           Previously that function was called `fix_headers` and modified
+           the response object in place.  Also since 0.6, IRIs in location
+           and content-location headers are handled properly.
+
+           Also starting with 0.6, Werkzeug will attempt to set the content
+           length if it is able to figure it out on its own.  This is the
+           case if all the strings in the response iterable are already
+           encoded and the iterable is buffered.
+
+        :param environ: the WSGI environment of the request.
+        :return: returns a new :class:`~werkzeug.datastructures.Headers`
+                 object.
+        """
+        headers = Headers(self.headers)
+        location: t.Optional[str] = None
+        content_location: t.Optional[str] = None
+        content_length: t.Optional[t.Union[str, int]] = None
+        status = self.status_code
+
+        # iterate over the headers to find all values in one go.  Because
+        # get_wsgi_headers is used each response that gives us a tiny
+        # speedup.
+        for key, value in headers:
+            ikey = key.lower()
+            if ikey == "location":
+                location = value
+            elif ikey == "content-location":
+                content_location = value
+            elif ikey == "content-length":
+                content_length = value
+
+        # make sure the location header is an absolute URL
+        if location is not None:
+            old_location = location
+            if isinstance(location, str):
+                # Safe conversion is necessary here as we might redirect
+                # to a broken URI scheme (for instance itms-services).
+                location = iri_to_uri(location, safe_conversion=True)
+
+            if self.autocorrect_location_header:
+                current_url = get_current_url(environ, strip_querystring=True)
+                if isinstance(current_url, str):
+                    current_url = iri_to_uri(current_url)
+                location = url_join(current_url, location)
+            if location != old_location:
+                headers["Location"] = location
+
+        # make sure the content location is a URL
+        if content_location is not None and isinstance(content_location, str):
+            headers["Content-Location"] = iri_to_uri(content_location)
+
+        if 100 <= status < 200 or status == 204:
+            # Per section 3.3.2 of RFC 7230, "a server MUST NOT send a
+            # Content-Length header field in any response with a status
+            # code of 1xx (Informational) or 204 (No Content)."
+            headers.remove("Content-Length")
+        elif status == 304:
+            remove_entity_headers(headers)
+
+        # if we can determine the content length automatically, we
+        # should try to do that.  But only if this does not involve
+        # flattening the iterator or encoding of strings in the
+        # response. We however should not do that if we have a 304
+        # response.
+        if (
+            self.automatically_set_content_length
+            and self.is_sequence
+            and content_length is None
+            and status not in (204, 304)
+            and not (100 <= status < 200)
+        ):
+            try:
+                content_length = sum(len(_to_bytes(x, "ascii")) for x in self.response)
+            except UnicodeError:
+                # Something other than bytes, can't safely figure out
+                # the length of the response.
+                pass
+            else:
+                headers["Content-Length"] = str(content_length)
+
+        return headers
+
+    def get_app_iter(self, environ: "WSGIEnvironment") -> t.Iterable[bytes]:
+        """Returns the application iterator for the given environ.  Depending
+        on the request method and the current status code the return value
+        might be an empty response rather than the one from the response.
+
+        If the request method is `HEAD` or the status code is in a range
+        where the HTTP specification requires an empty response, an empty
+        iterable is returned.
+
+        .. versionadded:: 0.6
+
+        :param environ: the WSGI environment of the request.
+        :return: a response iterable.
+        """
+        status = self.status_code
+        if (
+            environ["REQUEST_METHOD"] == "HEAD"
+            or 100 <= status < 200
+            or status in (204, 304)
+        ):
+            iterable: t.Iterable[bytes] = ()
+        elif self.direct_passthrough:
+            if __debug__:
+                _warn_if_string(self.response)
+            return self.response  # type: ignore
+        else:
+            iterable = self.iter_encoded()
+        return ClosingIterator(iterable, self.close)
+
+    def get_wsgi_response(
+        self, environ: "WSGIEnvironment"
+    ) -> t.Tuple[t.Iterable[bytes], str, t.List[t.Tuple[str, str]]]:
+        """Returns the final WSGI response as tuple.  The first item in
+        the tuple is the application iterator, the second the status and
+        the third the list of headers.  The response returned is created
+        specially for the given environment.  For example if the request
+        method in the WSGI environment is ``'HEAD'`` the response will
+        be empty and only the headers and status code will be present.
+
+        .. versionadded:: 0.6
+
+        :param environ: the WSGI environment of the request.
+        :return: an ``(app_iter, status, headers)`` tuple.
+        """
+        headers = self.get_wsgi_headers(environ)
+        app_iter = self.get_app_iter(environ)
+        return app_iter, self.status, headers.to_wsgi_list()
+
+    def __call__(
+        self, environ: "WSGIEnvironment", start_response: "StartResponse"
+    ) -> t.Iterable[bytes]:
+        """Process this response as WSGI application.
+
+        :param environ: the WSGI environment.
+        :param start_response: the response callable provided by the WSGI
+                               server.
+        :return: an application iterator
+        """
+        app_iter, status, headers = self.get_wsgi_response(environ)
+        start_response(status, headers)
+        return app_iter
+
+    # JSON
+
+    #: A module or other object that has ``dumps`` and ``loads``
+    #: functions that match the API of the built-in :mod:`json` module.
+    json_module = json
+
+    @property
+    def json(self) -> t.Optional[t.Any]:
+        """The parsed JSON data if :attr:`mimetype` indicates JSON
+        (:mimetype:`application/json`, see :attr:`is_json`).
+
+        Calls :meth:`get_json` with default arguments.
+        """
+        return self.get_json()
+
+    def get_json(self, force: bool = False, silent: bool = False) -> t.Optional[t.Any]:
+        """Parse :attr:`data` as JSON. Useful during testing.
+
+        If the mimetype does not indicate JSON
+        (:mimetype:`application/json`, see :attr:`is_json`), this
+        returns ``None``.
+
+        Unlike :meth:`Request.get_json`, the result is not cached.
+
+        :param force: Ignore the mimetype and always try to parse JSON.
+        :param silent: Silence parsing errors and return ``None``
+            instead.
+        """
+        if not (force or self.is_json):
+            return None
+
+        data = self.get_data()
+
+        try:
+            return self.json_module.loads(data)
+        except ValueError:
+            if not silent:
+                raise
+
+            return None
+
+    # Stream
+
+    @cached_property
+    def stream(self) -> "ResponseStream":
+        """The response iterable as write-only stream."""
+        return ResponseStream(self)
+
+    def _wrap_range_response(self, start: int, length: int) -> None:
+        """Wrap existing Response in case of Range Request context."""
+        if self.status_code == 206:
+            self.response = _RangeWrapper(self.response, start, length)  # type: ignore
+
+    def _is_range_request_processable(self, environ: "WSGIEnvironment") -> bool:
+        """Return ``True`` if `Range` header is present and if underlying
+        resource is considered unchanged when compared with `If-Range` header.
+        """
+        return (
+            "HTTP_IF_RANGE" not in environ
+            or not is_resource_modified(
+                environ,
+                self.headers.get("etag"),
+                None,
+                self.headers.get("last-modified"),
+                ignore_if_range=False,
+            )
+        ) and "HTTP_RANGE" in environ
+
+    def _process_range_request(
+        self,
+        environ: "WSGIEnvironment",
+        complete_length: t.Optional[int] = None,
+        accept_ranges: t.Optional[t.Union[bool, str]] = None,
+    ) -> bool:
+        """Handle Range Request related headers (RFC7233).  If `Accept-Ranges`
+        header is valid, and Range Request is processable, we set the headers
+        as described by the RFC, and wrap the underlying response in a
+        RangeWrapper.
+
+        Returns ``True`` if Range Request can be fulfilled, ``False`` otherwise.
+
+        :raises: :class:`~werkzeug.exceptions.RequestedRangeNotSatisfiable`
+                 if `Range` header could not be parsed or satisfied.
+
+        .. versionchanged:: 2.0
+            Returns ``False`` if the length is 0.
+        """
+        from ..exceptions import RequestedRangeNotSatisfiable
+
+        if (
+            accept_ranges is None
+            or complete_length is None
+            or complete_length == 0
+            or not self._is_range_request_processable(environ)
+        ):
+            return False
+
+        parsed_range = parse_range_header(environ.get("HTTP_RANGE"))
+
+        if parsed_range is None:
+            raise RequestedRangeNotSatisfiable(complete_length)
+
+        range_tuple = parsed_range.range_for_length(complete_length)
+        content_range_header = parsed_range.to_content_range_header(complete_length)
+
+        if range_tuple is None or content_range_header is None:
+            raise RequestedRangeNotSatisfiable(complete_length)
+
+        content_length = range_tuple[1] - range_tuple[0]
+        self.headers["Content-Length"] = content_length
+        self.headers["Accept-Ranges"] = accept_ranges
+        self.content_range = content_range_header  # type: ignore
+        self.status_code = 206
+        self._wrap_range_response(range_tuple[0], content_length)
+        return True
+
+    def make_conditional(
+        self,
+        request_or_environ: "WSGIEnvironment",
+        accept_ranges: t.Union[bool, str] = False,
+        complete_length: t.Optional[int] = None,
+    ) -> "Response":
+        """Make the response conditional to the request.  This method works
+        best if an etag was defined for the response already.  The `add_etag`
+        method can be used to do that.  If called without etag just the date
+        header is set.
+
+        This does nothing if the request method in the request or environ is
+        anything but GET or HEAD.
+
+        For optimal performance when handling range requests, it's recommended
+        that your response data object implements `seekable`, `seek` and `tell`
+        methods as described by :py:class:`io.IOBase`.  Objects returned by
+        :meth:`~werkzeug.wsgi.wrap_file` automatically implement those methods.
+
+        It does not remove the body of the response because that's something
+        the :meth:`__call__` function does for us automatically.
+
+        Returns self so that you can do ``return resp.make_conditional(req)``
+        but modifies the object in-place.
+
+        :param request_or_environ: a request object or WSGI environment to be
+                                   used to make the response conditional
+                                   against.
+        :param accept_ranges: This parameter dictates the value of
+                              `Accept-Ranges` header. If ``False`` (default),
+                              the header is not set. If ``True``, it will be set
+                              to ``"bytes"``. If ``None``, it will be set to
+                              ``"none"``. If it's a string, it will use this
+                              value.
+        :param complete_length: Will be used only in valid Range Requests.
+                                It will set `Content-Range` complete length
+                                value and compute `Content-Length` real value.
+                                This parameter is mandatory for successful
+                                Range Requests completion.
+        :raises: :class:`~werkzeug.exceptions.RequestedRangeNotSatisfiable`
+                 if `Range` header could not be parsed or satisfied.
+
+        .. versionchanged:: 2.0
+            Range processing is skipped if length is 0 instead of
+            raising a 416 Range Not Satisfiable error.
+        """
+        environ = _get_environ(request_or_environ)
+        if environ["REQUEST_METHOD"] in ("GET", "HEAD"):
+            # if the date is not in the headers, add it now.  We however
+            # will not override an already existing header.  Unfortunately
+            # this header will be overriden by many WSGI servers including
+            # wsgiref.
+            if "date" not in self.headers:
+                self.headers["Date"] = http_date()
+            accept_ranges = _clean_accept_ranges(accept_ranges)
+            is206 = self._process_range_request(environ, complete_length, accept_ranges)
+            if not is206 and not is_resource_modified(
+                environ,
+                self.headers.get("etag"),
+                None,
+                self.headers.get("last-modified"),
+            ):
+                if parse_etags(environ.get("HTTP_IF_MATCH")):
+                    self.status_code = 412
+                else:
+                    self.status_code = 304
+            if (
+                self.automatically_set_content_length
+                and "content-length" not in self.headers
+            ):
+                length = self.calculate_content_length()
+                if length is not None:
+                    self.headers["Content-Length"] = length
+        return self
+
+    def add_etag(self, overwrite: bool = False, weak: bool = False) -> None:
+        """Add an etag for the current response if there is none yet.
+
+        .. versionchanged:: 2.0
+            SHA-1 is used to generate the value. MD5 may not be
+            available in some environments.
+        """
+        if overwrite or "etag" not in self.headers:
+            self.set_etag(generate_etag(self.get_data()), weak)
+
+
+class ResponseStream:
+    """A file descriptor like object used by the :class:`ResponseStreamMixin` to
+    represent the body of the stream.  It directly pushes into the response
+    iterable of the response object.
+    """
+
+    mode = "wb+"
+
+    def __init__(self, response: Response):
+        self.response = response
+        self.closed = False
+
+    def write(self, value: bytes) -> int:
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+        self.response._ensure_sequence(mutable=True)
+        self.response.response.append(value)  # type: ignore
+        self.response.headers.pop("Content-Length", None)
+        return len(value)
+
+    def writelines(self, seq: t.Iterable[bytes]) -> None:
+        for item in seq:
+            self.write(item)
+
+    def close(self) -> None:
+        self.closed = True
+
+    def flush(self) -> None:
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+
+    def isatty(self) -> bool:
+        if self.closed:
+            raise ValueError("I/O operation on closed file")
+        return False
+
+    def tell(self) -> int:
+        self.response._ensure_sequence()
+        return sum(map(len, self.response.response))
+
+    @property
+    def encoding(self) -> str:
+        return self.response.charset
+
+
+class ResponseStreamMixin:
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'ResponseStreamMixin' is deprecated and will be removed in"
+            " Werkzeug 2.1. 'Response' now includes the functionality"
+            " directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)  # type: ignore
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wrappers/user_agent.py b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/user_agent.py
new file mode 100644
index 0000000..184ffd0
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/wrappers/user_agent.py
@@ -0,0 +1,14 @@
+import typing as t
+import warnings
+
+
+class UserAgentMixin:
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        warnings.warn(
+            "'UserAgentMixin' is deprecated and will be removed in"
+            " Werkzeug 2.1. 'Request' now includes the functionality"
+            " directly.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+        super().__init__(*args, **kwargs)  # type: ignore
diff --git a/.venv/lib/python3.6/site-packages/werkzeug/wsgi.py b/.venv/lib/python3.6/site-packages/werkzeug/wsgi.py
new file mode 100644
index 0000000..9cfa74d
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/werkzeug/wsgi.py
@@ -0,0 +1,982 @@
+import io
+import re
+import typing as t
+from functools import partial
+from functools import update_wrapper
+from itertools import chain
+
+from ._internal import _make_encode_wrapper
+from ._internal import _to_bytes
+from ._internal import _to_str
+from .sansio import utils as _sansio_utils
+from .sansio.utils import host_is_trusted  # noqa: F401 # Imported as part of API
+from .urls import _URLTuple
+from .urls import uri_to_iri
+from .urls import url_join
+from .urls import url_parse
+from .urls import url_quote
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+
+
+def responder(f: t.Callable[..., "WSGIApplication"]) -> "WSGIApplication":
+    """Marks a function as responder.  Decorate a function with it and it
+    will automatically call the return value as WSGI application.
+
+    Example::
+
+        @responder
+        def application(environ, start_response):
+            return Response('Hello World!')
+    """
+    return update_wrapper(lambda *a: f(*a)(*a[-2:]), f)
+
+
+def get_current_url(
+    environ: "WSGIEnvironment",
+    root_only: bool = False,
+    strip_querystring: bool = False,
+    host_only: bool = False,
+    trusted_hosts: t.Optional[t.Iterable[str]] = None,
+) -> str:
+    """Recreate the URL for a request from the parts in a WSGI
+    environment.
+
+    The URL is an IRI, not a URI, so it may contain Unicode characters.
+    Use :func:`~werkzeug.urls.iri_to_uri` to convert it to ASCII.
+
+    :param environ: The WSGI environment to get the URL parts from.
+    :param root_only: Only build the root path, don't include the
+        remaining path or query string.
+    :param strip_querystring: Don't include the query string.
+    :param host_only: Only build the scheme and host.
+    :param trusted_hosts: A list of trusted host names to validate the
+        host against.
+    """
+    parts = {
+        "scheme": environ["wsgi.url_scheme"],
+        "host": get_host(environ, trusted_hosts),
+    }
+
+    if not host_only:
+        parts["root_path"] = environ.get("SCRIPT_NAME", "")
+
+        if not root_only:
+            parts["path"] = environ.get("PATH_INFO", "")
+
+            if not strip_querystring:
+                parts["query_string"] = environ.get("QUERY_STRING", "").encode("latin1")
+
+    return _sansio_utils.get_current_url(**parts)
+
+
+def _get_server(
+    environ: "WSGIEnvironment",
+) -> t.Optional[t.Tuple[str, t.Optional[int]]]:
+    name = environ.get("SERVER_NAME")
+
+    if name is None:
+        return None
+
+    try:
+        port: t.Optional[int] = int(environ.get("SERVER_PORT", None))
+    except (TypeError, ValueError):
+        # unix socket
+        port = None
+
+    return name, port
+
+
+def get_host(
+    environ: "WSGIEnvironment", trusted_hosts: t.Optional[t.Iterable[str]] = None
+) -> str:
+    """Return the host for the given WSGI environment.
+
+    The ``Host`` header is preferred, then ``SERVER_NAME`` if it's not
+    set. The returned host will only contain the port if it is different
+    than the standard port for the protocol.
+
+    Optionally, verify that the host is trusted using
+    :func:`host_is_trusted` and raise a
+    :exc:`~werkzeug.exceptions.SecurityError` if it is not.
+
+    :param environ: A WSGI environment dict.
+    :param trusted_hosts: A list of trusted host names.
+
+    :return: Host, with port if necessary.
+    :raise ~werkzeug.exceptions.SecurityError: If the host is not
+        trusted.
+    """
+    return _sansio_utils.get_host(
+        environ["wsgi.url_scheme"],
+        environ.get("HTTP_HOST"),
+        _get_server(environ),
+        trusted_hosts,
+    )
+
+
+def get_content_length(environ: "WSGIEnvironment") -> t.Optional[int]:
+    """Returns the content length from the WSGI environment as
+    integer. If it's not available or chunked transfer encoding is used,
+    ``None`` is returned.
+
+    .. versionadded:: 0.9
+
+    :param environ: the WSGI environ to fetch the content length from.
+    """
+    if environ.get("HTTP_TRANSFER_ENCODING", "") == "chunked":
+        return None
+
+    content_length = environ.get("CONTENT_LENGTH")
+    if content_length is not None:
+        try:
+            return max(0, int(content_length))
+        except (ValueError, TypeError):
+            pass
+    return None
+
+
+def get_input_stream(
+    environ: "WSGIEnvironment", safe_fallback: bool = True
+) -> t.IO[bytes]:
+    """Returns the input stream from the WSGI environment and wraps it
+    in the most sensible way possible. The stream returned is not the
+    raw WSGI stream in most cases but one that is safe to read from
+    without taking into account the content length.
+
+    If content length is not set, the stream will be empty for safety reasons.
+    If the WSGI server supports chunked or infinite streams, it should set
+    the ``wsgi.input_terminated`` value in the WSGI environ to indicate that.
+
+    .. versionadded:: 0.9
+
+    :param environ: the WSGI environ to fetch the stream from.
+    :param safe_fallback: use an empty stream as a safe fallback when the
+        content length is not set. Disabling this allows infinite streams,
+        which can be a denial-of-service risk.
+    """
+    stream = t.cast(t.IO[bytes], environ["wsgi.input"])
+    content_length = get_content_length(environ)
+
+    # A wsgi extension that tells us if the input is terminated.  In
+    # that case we return the stream unchanged as we know we can safely
+    # read it until the end.
+    if environ.get("wsgi.input_terminated"):
+        return stream
+
+    # If the request doesn't specify a content length, returning the stream is
+    # potentially dangerous because it could be infinite, malicious or not. If
+    # safe_fallback is true, return an empty stream instead for safety.
+    if content_length is None:
+        return io.BytesIO() if safe_fallback else stream
+
+    # Otherwise limit the stream to the content length
+    return t.cast(t.IO[bytes], LimitedStream(stream, content_length))
+
+
+def get_query_string(environ: "WSGIEnvironment") -> str:
+    """Returns the ``QUERY_STRING`` from the WSGI environment. This also
+    takes care of the WSGI decoding dance. The string returned will be
+    restricted to ASCII characters.
+
+    :param environ: WSGI environment to get the query string from.
+
+    .. versionadded:: 0.9
+    """
+    qs = environ.get("QUERY_STRING", "").encode("latin1")
+    # QUERY_STRING really should be ascii safe but some browsers
+    # will send us some unicode stuff (I am looking at you IE).
+    # In that case we want to urllib quote it badly.
+    return url_quote(qs, safe=":&%=+$!*'(),")
+
+
+def get_path_info(
+    environ: "WSGIEnvironment", charset: str = "utf-8", errors: str = "replace"
+) -> str:
+    """Return the ``PATH_INFO`` from the WSGI environment and decode it
+    unless ``charset`` is ``None``.
+
+    :param environ: WSGI environment to get the path from.
+    :param charset: The charset for the path info, or ``None`` if no
+        decoding should be performed.
+    :param errors: The decoding error handling.
+
+    .. versionadded:: 0.9
+    """
+    path = environ.get("PATH_INFO", "").encode("latin1")
+    return _to_str(path, charset, errors, allow_none_charset=True)  # type: ignore
+
+
+def get_script_name(
+    environ: "WSGIEnvironment", charset: str = "utf-8", errors: str = "replace"
+) -> str:
+    """Return the ``SCRIPT_NAME`` from the WSGI environment and decode
+    it unless `charset` is set to ``None``.
+
+    :param environ: WSGI environment to get the path from.
+    :param charset: The charset for the path, or ``None`` if no decoding
+        should be performed.
+    :param errors: The decoding error handling.
+
+    .. versionadded:: 0.9
+    """
+    path = environ.get("SCRIPT_NAME", "").encode("latin1")
+    return _to_str(path, charset, errors, allow_none_charset=True)  # type: ignore
+
+
+def pop_path_info(
+    environ: "WSGIEnvironment", charset: str = "utf-8", errors: str = "replace"
+) -> t.Optional[str]:
+    """Removes and returns the next segment of `PATH_INFO`, pushing it onto
+    `SCRIPT_NAME`.  Returns `None` if there is nothing left on `PATH_INFO`.
+
+    If the `charset` is set to `None` bytes are returned.
+
+    If there are empty segments (``'/foo//bar``) these are ignored but
+    properly pushed to the `SCRIPT_NAME`:
+
+    >>> env = {'SCRIPT_NAME': '/foo', 'PATH_INFO': '/a/b'}
+    >>> pop_path_info(env)
+    'a'
+    >>> env['SCRIPT_NAME']
+    '/foo/a'
+    >>> pop_path_info(env)
+    'b'
+    >>> env['SCRIPT_NAME']
+    '/foo/a/b'
+
+    .. versionadded:: 0.5
+
+    .. versionchanged:: 0.9
+       The path is now decoded and a charset and encoding
+       parameter can be provided.
+
+    :param environ: the WSGI environment that is modified.
+    :param charset: The ``encoding`` parameter passed to
+        :func:`bytes.decode`.
+    :param errors: The ``errors`` paramater passed to
+        :func:`bytes.decode`.
+    """
+    path = environ.get("PATH_INFO")
+    if not path:
+        return None
+
+    script_name = environ.get("SCRIPT_NAME", "")
+
+    # shift multiple leading slashes over
+    old_path = path
+    path = path.lstrip("/")
+    if path != old_path:
+        script_name += "/" * (len(old_path) - len(path))
+
+    if "/" not in path:
+        environ["PATH_INFO"] = ""
+        environ["SCRIPT_NAME"] = script_name + path
+        rv = path.encode("latin1")
+    else:
+        segment, path = path.split("/", 1)
+        environ["PATH_INFO"] = f"/{path}"
+        environ["SCRIPT_NAME"] = script_name + segment
+        rv = segment.encode("latin1")
+
+    return _to_str(rv, charset, errors, allow_none_charset=True)  # type: ignore
+
+
+def peek_path_info(
+    environ: "WSGIEnvironment", charset: str = "utf-8", errors: str = "replace"
+) -> t.Optional[str]:
+    """Returns the next segment on the `PATH_INFO` or `None` if there
+    is none.  Works like :func:`pop_path_info` without modifying the
+    environment:
+
+    >>> env = {'SCRIPT_NAME': '/foo', 'PATH_INFO': '/a/b'}
+    >>> peek_path_info(env)
+    'a'
+    >>> peek_path_info(env)
+    'a'
+
+    If the `charset` is set to `None` bytes are returned.
+
+    .. versionadded:: 0.5
+
+    .. versionchanged:: 0.9
+       The path is now decoded and a charset and encoding
+       parameter can be provided.
+
+    :param environ: the WSGI environment that is checked.
+    """
+    segments = environ.get("PATH_INFO", "").lstrip("/").split("/", 1)
+    if segments:
+        return _to_str(  # type: ignore
+            segments[0].encode("latin1"), charset, errors, allow_none_charset=True
+        )
+    return None
+
+
+def extract_path_info(
+    environ_or_baseurl: t.Union[str, "WSGIEnvironment"],
+    path_or_url: t.Union[str, _URLTuple],
+    charset: str = "utf-8",
+    errors: str = "werkzeug.url_quote",
+    collapse_http_schemes: bool = True,
+) -> t.Optional[str]:
+    """Extracts the path info from the given URL (or WSGI environment) and
+    path. The path info returned is a string. The URLs might also be IRIs.
+
+    If the path info could not be determined, `None` is returned.
+
+    Some examples:
+
+    >>> extract_path_info('http://example.com/app', '/app/hello')
+    '/hello'
+    >>> extract_path_info('http://example.com/app',
+    ...                   'https://example.com/app/hello')
+    '/hello'
+    >>> extract_path_info('http://example.com/app',
+    ...                   'https://example.com/app/hello',
+    ...                   collapse_http_schemes=False) is None
+    True
+
+    Instead of providing a base URL you can also pass a WSGI environment.
+
+    :param environ_or_baseurl: a WSGI environment dict, a base URL or
+                               base IRI.  This is the root of the
+                               application.
+    :param path_or_url: an absolute path from the server root, a
+                        relative path (in which case it's the path info)
+                        or a full URL.
+    :param charset: the charset for byte data in URLs
+    :param errors: the error handling on decode
+    :param collapse_http_schemes: if set to `False` the algorithm does
+                                  not assume that http and https on the
+                                  same server point to the same
+                                  resource.
+
+    .. versionchanged:: 0.15
+        The ``errors`` parameter defaults to leaving invalid bytes
+        quoted instead of replacing them.
+
+    .. versionadded:: 0.6
+    """
+
+    def _normalize_netloc(scheme: str, netloc: str) -> str:
+        parts = netloc.split("@", 1)[-1].split(":", 1)
+        port: t.Optional[str]
+
+        if len(parts) == 2:
+            netloc, port = parts
+            if (scheme == "http" and port == "80") or (
+                scheme == "https" and port == "443"
+            ):
+                port = None
+        else:
+            netloc = parts[0]
+            port = None
+
+        if port is not None:
+            netloc += f":{port}"
+
+        return netloc
+
+    # make sure whatever we are working on is a IRI and parse it
+    path = uri_to_iri(path_or_url, charset, errors)
+    if isinstance(environ_or_baseurl, dict):
+        environ_or_baseurl = get_current_url(environ_or_baseurl, root_only=True)
+    base_iri = uri_to_iri(environ_or_baseurl, charset, errors)
+    base_scheme, base_netloc, base_path = url_parse(base_iri)[:3]
+    cur_scheme, cur_netloc, cur_path = url_parse(url_join(base_iri, path))[:3]
+
+    # normalize the network location
+    base_netloc = _normalize_netloc(base_scheme, base_netloc)
+    cur_netloc = _normalize_netloc(cur_scheme, cur_netloc)
+
+    # is that IRI even on a known HTTP scheme?
+    if collapse_http_schemes:
+        for scheme in base_scheme, cur_scheme:
+            if scheme not in ("http", "https"):
+                return None
+    else:
+        if not (base_scheme in ("http", "https") and base_scheme == cur_scheme):
+            return None
+
+    # are the netlocs compatible?
+    if base_netloc != cur_netloc:
+        return None
+
+    # are we below the application path?
+    base_path = base_path.rstrip("/")
+    if not cur_path.startswith(base_path):
+        return None
+
+    return f"/{cur_path[len(base_path) :].lstrip('/')}"
+
+
+class ClosingIterator:
+    """The WSGI specification requires that all middlewares and gateways
+    respect the `close` callback of the iterable returned by the application.
+    Because it is useful to add another close action to a returned iterable
+    and adding a custom iterable is a boring task this class can be used for
+    that::
+
+        return ClosingIterator(app(environ, start_response), [cleanup_session,
+                                                              cleanup_locals])
+
+    If there is just one close function it can be passed instead of the list.
+
+    A closing iterator is not needed if the application uses response objects
+    and finishes the processing if the response is started::
+
+        try:
+            return response(environ, start_response)
+        finally:
+            cleanup_session()
+            cleanup_locals()
+    """
+
+    def __init__(
+        self,
+        iterable: t.Iterable[bytes],
+        callbacks: t.Optional[
+            t.Union[t.Callable[[], None], t.Iterable[t.Callable[[], None]]]
+        ] = None,
+    ) -> None:
+        iterator = iter(iterable)
+        self._next = t.cast(t.Callable[[], bytes], partial(next, iterator))
+        if callbacks is None:
+            callbacks = []
+        elif callable(callbacks):
+            callbacks = [callbacks]
+        else:
+            callbacks = list(callbacks)
+        iterable_close = getattr(iterable, "close", None)
+        if iterable_close:
+            callbacks.insert(0, iterable_close)
+        self._callbacks = callbacks
+
+    def __iter__(self) -> "ClosingIterator":
+        return self
+
+    def __next__(self) -> bytes:
+        return self._next()
+
+    def close(self) -> None:
+        for callback in self._callbacks:
+            callback()
+
+
+def wrap_file(
+    environ: "WSGIEnvironment", file: t.IO[bytes], buffer_size: int = 8192
+) -> t.Iterable[bytes]:
+    """Wraps a file.  This uses the WSGI server's file wrapper if available
+    or otherwise the generic :class:`FileWrapper`.
+
+    .. versionadded:: 0.5
+
+    If the file wrapper from the WSGI server is used it's important to not
+    iterate over it from inside the application but to pass it through
+    unchanged.  If you want to pass out a file wrapper inside a response
+    object you have to set :attr:`Response.direct_passthrough` to `True`.
+
+    More information about file wrappers are available in :pep:`333`.
+
+    :param file: a :class:`file`-like object with a :meth:`~file.read` method.
+    :param buffer_size: number of bytes for one iteration.
+    """
+    return environ.get("wsgi.file_wrapper", FileWrapper)(  # type: ignore
+        file, buffer_size
+    )
+
+
+class FileWrapper:
+    """This class can be used to convert a :class:`file`-like object into
+    an iterable.  It yields `buffer_size` blocks until the file is fully
+    read.
+
+    You should not use this class directly but rather use the
+    :func:`wrap_file` function that uses the WSGI server's file wrapper
+    support if it's available.
+
+    .. versionadded:: 0.5
+
+    If you're using this object together with a :class:`Response` you have
+    to use the `direct_passthrough` mode.
+
+    :param file: a :class:`file`-like object with a :meth:`~file.read` method.
+    :param buffer_size: number of bytes for one iteration.
+    """
+
+    def __init__(self, file: t.IO[bytes], buffer_size: int = 8192) -> None:
+        self.file = file
+        self.buffer_size = buffer_size
+
+    def close(self) -> None:
+        if hasattr(self.file, "close"):
+            self.file.close()
+
+    def seekable(self) -> bool:
+        if hasattr(self.file, "seekable"):
+            return self.file.seekable()
+        if hasattr(self.file, "seek"):
+            return True
+        return False
+
+    def seek(self, *args: t.Any) -> None:
+        if hasattr(self.file, "seek"):
+            self.file.seek(*args)
+
+    def tell(self) -> t.Optional[int]:
+        if hasattr(self.file, "tell"):
+            return self.file.tell()
+        return None
+
+    def __iter__(self) -> "FileWrapper":
+        return self
+
+    def __next__(self) -> bytes:
+        data = self.file.read(self.buffer_size)
+        if data:
+            return data
+        raise StopIteration()
+
+
+class _RangeWrapper:
+    # private for now, but should we make it public in the future ?
+
+    """This class can be used to convert an iterable object into
+    an iterable that will only yield a piece of the underlying content.
+    It yields blocks until the underlying stream range is fully read.
+    The yielded blocks will have a size that can't exceed the original
+    iterator defined block size, but that can be smaller.
+
+    If you're using this object together with a :class:`Response` you have
+    to use the `direct_passthrough` mode.
+
+    :param iterable: an iterable object with a :meth:`__next__` method.
+    :param start_byte: byte from which read will start.
+    :param byte_range: how many bytes to read.
+    """
+
+    def __init__(
+        self,
+        iterable: t.Union[t.Iterable[bytes], t.IO[bytes]],
+        start_byte: int = 0,
+        byte_range: t.Optional[int] = None,
+    ):
+        self.iterable = iter(iterable)
+        self.byte_range = byte_range
+        self.start_byte = start_byte
+        self.end_byte = None
+
+        if byte_range is not None:
+            self.end_byte = start_byte + byte_range
+
+        self.read_length = 0
+        self.seekable = (
+            hasattr(iterable, "seekable") and iterable.seekable()  # type: ignore
+        )
+        self.end_reached = False
+
+    def __iter__(self) -> "_RangeWrapper":
+        return self
+
+    def _next_chunk(self) -> bytes:
+        try:
+            chunk = next(self.iterable)
+            self.read_length += len(chunk)
+            return chunk
+        except StopIteration:
+            self.end_reached = True
+            raise
+
+    def _first_iteration(self) -> t.Tuple[t.Optional[bytes], int]:
+        chunk = None
+        if self.seekable:
+            self.iterable.seek(self.start_byte)  # type: ignore
+            self.read_length = self.iterable.tell()  # type: ignore
+            contextual_read_length = self.read_length
+        else:
+            while self.read_length <= self.start_byte:
+                chunk = self._next_chunk()
+            if chunk is not None:
+                chunk = chunk[self.start_byte - self.read_length :]
+            contextual_read_length = self.start_byte
+        return chunk, contextual_read_length
+
+    def _next(self) -> bytes:
+        if self.end_reached:
+            raise StopIteration()
+        chunk = None
+        contextual_read_length = self.read_length
+        if self.read_length == 0:
+            chunk, contextual_read_length = self._first_iteration()
+        if chunk is None:
+            chunk = self._next_chunk()
+        if self.end_byte is not None and self.read_length >= self.end_byte:
+            self.end_reached = True
+            return chunk[: self.end_byte - contextual_read_length]
+        return chunk
+
+    def __next__(self) -> bytes:
+        chunk = self._next()
+        if chunk:
+            return chunk
+        self.end_reached = True
+        raise StopIteration()
+
+    def close(self) -> None:
+        if hasattr(self.iterable, "close"):
+            self.iterable.close()  # type: ignore
+
+
+def _make_chunk_iter(
+    stream: t.Union[t.Iterable[bytes], t.IO[bytes]],
+    limit: t.Optional[int],
+    buffer_size: int,
+) -> t.Iterator[bytes]:
+    """Helper for the line and chunk iter functions."""
+    if isinstance(stream, (bytes, bytearray, str)):
+        raise TypeError(
+            "Passed a string or byte object instead of true iterator or stream."
+        )
+    if not hasattr(stream, "read"):
+        for item in stream:
+            if item:
+                yield item
+        return
+    stream = t.cast(t.IO[bytes], stream)
+    if not isinstance(stream, LimitedStream) and limit is not None:
+        stream = t.cast(t.IO[bytes], LimitedStream(stream, limit))
+    _read = stream.read
+    while True:
+        item = _read(buffer_size)
+        if not item:
+            break
+        yield item
+
+
+def make_line_iter(
+    stream: t.Union[t.Iterable[bytes], t.IO[bytes]],
+    limit: t.Optional[int] = None,
+    buffer_size: int = 10 * 1024,
+    cap_at_buffer: bool = False,
+) -> t.Iterator[bytes]:
+    """Safely iterates line-based over an input stream.  If the input stream
+    is not a :class:`LimitedStream` the `limit` parameter is mandatory.
+
+    This uses the stream's :meth:`~file.read` method internally as opposite
+    to the :meth:`~file.readline` method that is unsafe and can only be used
+    in violation of the WSGI specification.  The same problem applies to the
+    `__iter__` function of the input stream which calls :meth:`~file.readline`
+    without arguments.
+
+    If you need line-by-line processing it's strongly recommended to iterate
+    over the input stream using this helper function.
+
+    .. versionchanged:: 0.8
+       This function now ensures that the limit was reached.
+
+    .. versionadded:: 0.9
+       added support for iterators as input stream.
+
+    .. versionadded:: 0.11.10
+       added support for the `cap_at_buffer` parameter.
+
+    :param stream: the stream or iterate to iterate over.
+    :param limit: the limit in bytes for the stream.  (Usually
+                  content length.  Not necessary if the `stream`
+                  is a :class:`LimitedStream`.
+    :param buffer_size: The optional buffer size.
+    :param cap_at_buffer: if this is set chunks are split if they are longer
+                          than the buffer size.  Internally this is implemented
+                          that the buffer size might be exhausted by a factor
+                          of two however.
+    """
+    _iter = _make_chunk_iter(stream, limit, buffer_size)
+
+    first_item = next(_iter, "")
+    if not first_item:
+        return
+
+    s = _make_encode_wrapper(first_item)
+    empty = t.cast(bytes, s(""))
+    cr = t.cast(bytes, s("\r"))
+    lf = t.cast(bytes, s("\n"))
+    crlf = t.cast(bytes, s("\r\n"))
+
+    _iter = t.cast(t.Iterator[bytes], chain((first_item,), _iter))
+
+    def _iter_basic_lines() -> t.Iterator[bytes]:
+        _join = empty.join
+        buffer: t.List[bytes] = []
+        while True:
+            new_data = next(_iter, "")
+            if not new_data:
+                break
+            new_buf: t.List[bytes] = []
+            buf_size = 0
+            for item in t.cast(
+                t.Iterator[bytes], chain(buffer, new_data.splitlines(True))
+            ):
+                new_buf.append(item)
+                buf_size += len(item)
+                if item and item[-1:] in crlf:
+                    yield _join(new_buf)
+                    new_buf = []
+                elif cap_at_buffer and buf_size >= buffer_size:
+                    rv = _join(new_buf)
+                    while len(rv) >= buffer_size:
+                        yield rv[:buffer_size]
+                        rv = rv[buffer_size:]
+                    new_buf = [rv]
+            buffer = new_buf
+        if buffer:
+            yield _join(buffer)
+
+    # This hackery is necessary to merge 'foo\r' and '\n' into one item
+    # of 'foo\r\n' if we were unlucky and we hit a chunk boundary.
+    previous = empty
+    for item in _iter_basic_lines():
+        if item == lf and previous[-1:] == cr:
+            previous += item
+            item = empty
+        if previous:
+            yield previous
+        previous = item
+    if previous:
+        yield previous
+
+
+def make_chunk_iter(
+    stream: t.Union[t.Iterable[bytes], t.IO[bytes]],
+    separator: bytes,
+    limit: t.Optional[int] = None,
+    buffer_size: int = 10 * 1024,
+    cap_at_buffer: bool = False,
+) -> t.Iterator[bytes]:
+    """Works like :func:`make_line_iter` but accepts a separator
+    which divides chunks.  If you want newline based processing
+    you should use :func:`make_line_iter` instead as it
+    supports arbitrary newline markers.
+
+    .. versionadded:: 0.8
+
+    .. versionadded:: 0.9
+       added support for iterators as input stream.
+
+    .. versionadded:: 0.11.10
+       added support for the `cap_at_buffer` parameter.
+
+    :param stream: the stream or iterate to iterate over.
+    :param separator: the separator that divides chunks.
+    :param limit: the limit in bytes for the stream.  (Usually
+                  content length.  Not necessary if the `stream`
+                  is otherwise already limited).
+    :param buffer_size: The optional buffer size.
+    :param cap_at_buffer: if this is set chunks are split if they are longer
+                          than the buffer size.  Internally this is implemented
+                          that the buffer size might be exhausted by a factor
+                          of two however.
+    """
+    _iter = _make_chunk_iter(stream, limit, buffer_size)
+
+    first_item = next(_iter, b"")
+    if not first_item:
+        return
+
+    _iter = t.cast(t.Iterator[bytes], chain((first_item,), _iter))
+    if isinstance(first_item, str):
+        separator = _to_str(separator)
+        _split = re.compile(f"({re.escape(separator)})").split
+        _join = "".join
+    else:
+        separator = _to_bytes(separator)
+        _split = re.compile(b"(" + re.escape(separator) + b")").split
+        _join = b"".join
+
+    buffer: t.List[bytes] = []
+    while True:
+        new_data = next(_iter, b"")
+        if not new_data:
+            break
+        chunks = _split(new_data)
+        new_buf: t.List[bytes] = []
+        buf_size = 0
+        for item in chain(buffer, chunks):
+            if item == separator:
+                yield _join(new_buf)
+                new_buf = []
+                buf_size = 0
+            else:
+                buf_size += len(item)
+                new_buf.append(item)
+
+                if cap_at_buffer and buf_size >= buffer_size:
+                    rv = _join(new_buf)
+                    while len(rv) >= buffer_size:
+                        yield rv[:buffer_size]
+                        rv = rv[buffer_size:]
+                    new_buf = [rv]
+                    buf_size = len(rv)
+
+        buffer = new_buf
+    if buffer:
+        yield _join(buffer)
+
+
+class LimitedStream(io.IOBase):
+    """Wraps a stream so that it doesn't read more than n bytes.  If the
+    stream is exhausted and the caller tries to get more bytes from it
+    :func:`on_exhausted` is called which by default returns an empty
+    string.  The return value of that function is forwarded
+    to the reader function.  So if it returns an empty string
+    :meth:`read` will return an empty string as well.
+
+    The limit however must never be higher than what the stream can
+    output.  Otherwise :meth:`readlines` will try to read past the
+    limit.
+
+    .. admonition:: Note on WSGI compliance
+
+       calls to :meth:`readline` and :meth:`readlines` are not
+       WSGI compliant because it passes a size argument to the
+       readline methods.  Unfortunately the WSGI PEP is not safely
+       implementable without a size argument to :meth:`readline`
+       because there is no EOF marker in the stream.  As a result
+       of that the use of :meth:`readline` is discouraged.
+
+       For the same reason iterating over the :class:`LimitedStream`
+       is not portable.  It internally calls :meth:`readline`.
+
+       We strongly suggest using :meth:`read` only or using the
+       :func:`make_line_iter` which safely iterates line-based
+       over a WSGI input stream.
+
+    :param stream: the stream to wrap.
+    :param limit: the limit for the stream, must not be longer than
+                  what the string can provide if the stream does not
+                  end with `EOF` (like `wsgi.input`)
+    """
+
+    def __init__(self, stream: t.IO[bytes], limit: int) -> None:
+        self._read = stream.read
+        self._readline = stream.readline
+        self._pos = 0
+        self.limit = limit
+
+    def __iter__(self) -> "LimitedStream":
+        return self
+
+    @property
+    def is_exhausted(self) -> bool:
+        """If the stream is exhausted this attribute is `True`."""
+        return self._pos >= self.limit
+
+    def on_exhausted(self) -> bytes:
+        """This is called when the stream tries to read past the limit.
+        The return value of this function is returned from the reading
+        function.
+        """
+        # Read null bytes from the stream so that we get the
+        # correct end of stream marker.
+        return self._read(0)
+
+    def on_disconnect(self) -> bytes:
+        """What should happen if a disconnect is detected?  The return
+        value of this function is returned from read functions in case
+        the client went away.  By default a
+        :exc:`~werkzeug.exceptions.ClientDisconnected` exception is raised.
+        """
+        from .exceptions import ClientDisconnected
+
+        raise ClientDisconnected()
+
+    def exhaust(self, chunk_size: int = 1024 * 64) -> None:
+        """Exhaust the stream.  This consumes all the data left until the
+        limit is reached.
+
+        :param chunk_size: the size for a chunk.  It will read the chunk
+                           until the stream is exhausted and throw away
+                           the results.
+        """
+        to_read = self.limit - self._pos
+        chunk = chunk_size
+        while to_read > 0:
+            chunk = min(to_read, chunk)
+            self.read(chunk)
+            to_read -= chunk
+
+    def read(self, size: t.Optional[int] = None) -> bytes:
+        """Read `size` bytes or if size is not provided everything is read.
+
+        :param size: the number of bytes read.
+        """
+        if self._pos >= self.limit:
+            return self.on_exhausted()
+        if size is None or size == -1:  # -1 is for consistence with file
+            size = self.limit
+        to_read = min(self.limit - self._pos, size)
+        try:
+            read = self._read(to_read)
+        except (OSError, ValueError):
+            return self.on_disconnect()
+        if to_read and len(read) != to_read:
+            return self.on_disconnect()
+        self._pos += len(read)
+        return read
+
+    def readline(self, size: t.Optional[int] = None) -> bytes:
+        """Reads one line from the stream."""
+        if self._pos >= self.limit:
+            return self.on_exhausted()
+        if size is None:
+            size = self.limit - self._pos
+        else:
+            size = min(size, self.limit - self._pos)
+        try:
+            line = self._readline(size)
+        except (ValueError, OSError):
+            return self.on_disconnect()
+        if size and not line:
+            return self.on_disconnect()
+        self._pos += len(line)
+        return line
+
+    def readlines(self, size: t.Optional[int] = None) -> t.List[bytes]:
+        """Reads a file into a list of strings.  It calls :meth:`readline`
+        until the file is read to the end.  It does support the optional
+        `size` argument if the underlying stream supports it for
+        `readline`.
+        """
+        last_pos = self._pos
+        result = []
+        if size is not None:
+            end = min(self.limit, last_pos + size)
+        else:
+            end = self.limit
+        while True:
+            if size is not None:
+                size -= last_pos - self._pos
+            if self._pos >= end:
+                break
+            result.append(self.readline(size))
+            if size is not None:
+                last_pos = self._pos
+        return result
+
+    def tell(self) -> int:
+        """Returns the position of the stream.
+
+        .. versionadded:: 0.9
+        """
+        return self._pos
+
+    def __next__(self) -> bytes:
+        line = self.readline()
+        if not line:
+            raise StopIteration()
+        return line
+
+    def readable(self) -> bool:
+        return True
diff --git a/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/INSTALLER b/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/LICENSE b/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/LICENSE
new file mode 100644
index 0000000..353924b
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/LICENSE
@@ -0,0 +1,19 @@
+Copyright Jason R. Coombs
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
diff --git a/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/METADATA b/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/METADATA
new file mode 100644
index 0000000..23f844d
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/METADATA
@@ -0,0 +1,58 @@
+Metadata-Version: 2.1
+Name: zipp
+Version: 3.6.0
+Summary: Backport of pathlib-compatible object wrapper for zip files
+Home-page: https://github.com/jaraco/zipp
+Author: Jason R. Coombs
+Author-email: jaraco@jaraco.com
+License: UNKNOWN
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3 :: Only
+Requires-Python: >=3.6
+License-File: LICENSE
+Provides-Extra: docs
+Requires-Dist: sphinx ; extra == 'docs'
+Requires-Dist: jaraco.packaging (>=8.2) ; extra == 'docs'
+Requires-Dist: rst.linker (>=1.9) ; extra == 'docs'
+Provides-Extra: testing
+Requires-Dist: pytest (>=4.6) ; extra == 'testing'
+Requires-Dist: pytest-checkdocs (>=2.4) ; extra == 'testing'
+Requires-Dist: pytest-flake8 ; extra == 'testing'
+Requires-Dist: pytest-cov ; extra == 'testing'
+Requires-Dist: pytest-enabler (>=1.0.1) ; extra == 'testing'
+Requires-Dist: jaraco.itertools ; extra == 'testing'
+Requires-Dist: func-timeout ; extra == 'testing'
+Requires-Dist: pytest-black (>=0.3.7) ; (platform_python_implementation != "PyPy") and extra == 'testing'
+Requires-Dist: pytest-mypy ; (platform_python_implementation != "PyPy") and extra == 'testing'
+
+.. image:: https://img.shields.io/pypi/v/zipp.svg
+   :target: `PyPI link`_
+
+.. image:: https://img.shields.io/pypi/pyversions/zipp.svg
+   :target: `PyPI link`_
+
+.. _PyPI link: https://pypi.org/project/zipp
+
+.. image:: https://github.com/jaraco/zipp/workflows/tests/badge.svg
+   :target: https://github.com/jaraco/zipp/actions?query=workflow%3A%22tests%22
+   :alt: tests
+
+.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
+   :target: https://github.com/psf/black
+   :alt: Code style: Black
+
+.. .. image:: https://readthedocs.org/projects/skeleton/badge/?version=latest
+..    :target: https://skeleton.readthedocs.io/en/latest/?badge=latest
+
+.. image:: https://img.shields.io/badge/skeleton-2021-informational
+   :target: https://blog.jaraco.com/skeleton
+
+
+A pathlib-compatible Zipfile object wrapper. Official backport of the standard library
+`Path object `_.
+
+
diff --git a/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/RECORD b/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/RECORD
new file mode 100644
index 0000000..7f82176
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/RECORD
@@ -0,0 +1,8 @@
+__pycache__/zipp.cpython-36.pyc,,
+zipp-3.6.0.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+zipp-3.6.0.dist-info/LICENSE,sha256=2z8CRrH5J48VhFuZ_sR4uLUG63ZIeZNyL4xuJUKF-vg,1050
+zipp-3.6.0.dist-info/METADATA,sha256=qZcCKAkx7YTb17tMj97MF7A930rB-LWXw_5SwbGPefs,2263
+zipp-3.6.0.dist-info/RECORD,,
+zipp-3.6.0.dist-info/WHEEL,sha256=ewwEueio1C2XeHTvT17n8dZUJgOvyCWCt0WVNLClP9o,92
+zipp-3.6.0.dist-info/top_level.txt,sha256=iAbdoSHfaGqBfVb2XuR9JqSQHCoOsOtG6y9C_LSpqFw,5
+zipp.py,sha256=ajztOH-9I7KA_4wqDYygtHa6xUBVZgFpmZ8FE74HHHI,8425
diff --git a/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/WHEEL b/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/WHEEL
new file mode 100644
index 0000000..5bad85f
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.37.0)
+Root-Is-Purelib: true
+Tag: py3-none-any
+
diff --git a/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/top_level.txt b/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/top_level.txt
new file mode 100644
index 0000000..e82f676
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/zipp-3.6.0.dist-info/top_level.txt
@@ -0,0 +1 @@
+zipp
diff --git a/.venv/lib/python3.6/site-packages/zipp.py b/.venv/lib/python3.6/site-packages/zipp.py
new file mode 100644
index 0000000..26b723c
--- /dev/null
+++ b/.venv/lib/python3.6/site-packages/zipp.py
@@ -0,0 +1,329 @@
+import io
+import posixpath
+import zipfile
+import itertools
+import contextlib
+import sys
+import pathlib
+
+if sys.version_info < (3, 7):
+    from collections import OrderedDict
+else:
+    OrderedDict = dict
+
+
+__all__ = ['Path']
+
+
+def _parents(path):
+    """
+    Given a path with elements separated by
+    posixpath.sep, generate all parents of that path.
+
+    >>> list(_parents('b/d'))
+    ['b']
+    >>> list(_parents('/b/d/'))
+    ['/b']
+    >>> list(_parents('b/d/f/'))
+    ['b/d', 'b']
+    >>> list(_parents('b'))
+    []
+    >>> list(_parents(''))
+    []
+    """
+    return itertools.islice(_ancestry(path), 1, None)
+
+
+def _ancestry(path):
+    """
+    Given a path with elements separated by
+    posixpath.sep, generate all elements of that path
+
+    >>> list(_ancestry('b/d'))
+    ['b/d', 'b']
+    >>> list(_ancestry('/b/d/'))
+    ['/b/d', '/b']
+    >>> list(_ancestry('b/d/f/'))
+    ['b/d/f', 'b/d', 'b']
+    >>> list(_ancestry('b'))
+    ['b']
+    >>> list(_ancestry(''))
+    []
+    """
+    path = path.rstrip(posixpath.sep)
+    while path and path != posixpath.sep:
+        yield path
+        path, tail = posixpath.split(path)
+
+
+_dedupe = OrderedDict.fromkeys
+"""Deduplicate an iterable in original order"""
+
+
+def _difference(minuend, subtrahend):
+    """
+    Return items in minuend not in subtrahend, retaining order
+    with O(1) lookup.
+    """
+    return itertools.filterfalse(set(subtrahend).__contains__, minuend)
+
+
+class CompleteDirs(zipfile.ZipFile):
+    """
+    A ZipFile subclass that ensures that implied directories
+    are always included in the namelist.
+    """
+
+    @staticmethod
+    def _implied_dirs(names):
+        parents = itertools.chain.from_iterable(map(_parents, names))
+        as_dirs = (p + posixpath.sep for p in parents)
+        return _dedupe(_difference(as_dirs, names))
+
+    def namelist(self):
+        names = super(CompleteDirs, self).namelist()
+        return names + list(self._implied_dirs(names))
+
+    def _name_set(self):
+        return set(self.namelist())
+
+    def resolve_dir(self, name):
+        """
+        If the name represents a directory, return that name
+        as a directory (with the trailing slash).
+        """
+        names = self._name_set()
+        dirname = name + '/'
+        dir_match = name not in names and dirname in names
+        return dirname if dir_match else name
+
+    @classmethod
+    def make(cls, source):
+        """
+        Given a source (filename or zipfile), return an
+        appropriate CompleteDirs subclass.
+        """
+        if isinstance(source, CompleteDirs):
+            return source
+
+        if not isinstance(source, zipfile.ZipFile):
+            return cls(_pathlib_compat(source))
+
+        # Only allow for FastLookup when supplied zipfile is read-only
+        if 'r' not in source.mode:
+            cls = CompleteDirs
+
+        source.__class__ = cls
+        return source
+
+
+class FastLookup(CompleteDirs):
+    """
+    ZipFile subclass to ensure implicit
+    dirs exist and are resolved rapidly.
+    """
+
+    def namelist(self):
+        with contextlib.suppress(AttributeError):
+            return self.__names
+        self.__names = super(FastLookup, self).namelist()
+        return self.__names
+
+    def _name_set(self):
+        with contextlib.suppress(AttributeError):
+            return self.__lookup
+        self.__lookup = super(FastLookup, self)._name_set()
+        return self.__lookup
+
+
+def _pathlib_compat(path):
+    """
+    For path-like objects, convert to a filename for compatibility
+    on Python 3.6.1 and earlier.
+    """
+    try:
+        return path.__fspath__()
+    except AttributeError:
+        return str(path)
+
+
+class Path:
+    """
+    A pathlib-compatible interface for zip files.
+
+    Consider a zip file with this structure::
+
+        .
+        ├── a.txt
+        └── b
+            ├── c.txt
+            └── d
+                └── e.txt
+
+    >>> data = io.BytesIO()
+    >>> zf = zipfile.ZipFile(data, 'w')
+    >>> zf.writestr('a.txt', 'content of a')
+    >>> zf.writestr('b/c.txt', 'content of c')
+    >>> zf.writestr('b/d/e.txt', 'content of e')
+    >>> zf.filename = 'mem/abcde.zip'
+
+    Path accepts the zipfile object itself or a filename
+
+    >>> root = Path(zf)
+
+    From there, several path operations are available.
+
+    Directory iteration (including the zip file itself):
+
+    >>> a, b = root.iterdir()
+    >>> a
+    Path('mem/abcde.zip', 'a.txt')
+    >>> b
+    Path('mem/abcde.zip', 'b/')
+
+    name property:
+
+    >>> b.name
+    'b'
+
+    join with divide operator:
+
+    >>> c = b / 'c.txt'
+    >>> c
+    Path('mem/abcde.zip', 'b/c.txt')
+    >>> c.name
+    'c.txt'
+
+    Read text:
+
+    >>> c.read_text()
+    'content of c'
+
+    existence:
+
+    >>> c.exists()
+    True
+    >>> (b / 'missing.txt').exists()
+    False
+
+    Coercion to string:
+
+    >>> import os
+    >>> str(c).replace(os.sep, posixpath.sep)
+    'mem/abcde.zip/b/c.txt'
+
+    At the root, ``name``, ``filename``, and ``parent``
+    resolve to the zipfile. Note these attributes are not
+    valid and will raise a ``ValueError`` if the zipfile
+    has no filename.
+
+    >>> root.name
+    'abcde.zip'
+    >>> str(root.filename).replace(os.sep, posixpath.sep)
+    'mem/abcde.zip'
+    >>> str(root.parent)
+    'mem'
+    """
+
+    __repr = "{self.__class__.__name__}({self.root.filename!r}, {self.at!r})"
+
+    def __init__(self, root, at=""):
+        """
+        Construct a Path from a ZipFile or filename.
+
+        Note: When the source is an existing ZipFile object,
+        its type (__class__) will be mutated to a
+        specialized type. If the caller wishes to retain the
+        original type, the caller should either create a
+        separate ZipFile object or pass a filename.
+        """
+        self.root = FastLookup.make(root)
+        self.at = at
+
+    def open(self, mode='r', *args, pwd=None, **kwargs):
+        """
+        Open this entry as text or binary following the semantics
+        of ``pathlib.Path.open()`` by passing arguments through
+        to io.TextIOWrapper().
+        """
+        if self.is_dir():
+            raise IsADirectoryError(self)
+        zip_mode = mode[0]
+        if not self.exists() and zip_mode == 'r':
+            raise FileNotFoundError(self)
+        stream = self.root.open(self.at, zip_mode, pwd=pwd)
+        if 'b' in mode:
+            if args or kwargs:
+                raise ValueError("encoding args invalid for binary operation")
+            return stream
+        return io.TextIOWrapper(stream, *args, **kwargs)
+
+    @property
+    def name(self):
+        return pathlib.Path(self.at).name or self.filename.name
+
+    @property
+    def suffix(self):
+        return pathlib.Path(self.at).suffix or self.filename.suffix
+
+    @property
+    def suffixes(self):
+        return pathlib.Path(self.at).suffixes or self.filename.suffixes
+
+    @property
+    def stem(self):
+        return pathlib.Path(self.at).stem or self.filename.stem
+
+    @property
+    def filename(self):
+        return pathlib.Path(self.root.filename).joinpath(self.at)
+
+    def read_text(self, *args, **kwargs):
+        with self.open('r', *args, **kwargs) as strm:
+            return strm.read()
+
+    def read_bytes(self):
+        with self.open('rb') as strm:
+            return strm.read()
+
+    def _is_child(self, path):
+        return posixpath.dirname(path.at.rstrip("/")) == self.at.rstrip("/")
+
+    def _next(self, at):
+        return self.__class__(self.root, at)
+
+    def is_dir(self):
+        return not self.at or self.at.endswith("/")
+
+    def is_file(self):
+        return self.exists() and not self.is_dir()
+
+    def exists(self):
+        return self.at in self.root._name_set()
+
+    def iterdir(self):
+        if not self.is_dir():
+            raise ValueError("Can't listdir a file")
+        subs = map(self._next, self.root.namelist())
+        return filter(self._is_child, subs)
+
+    def __str__(self):
+        return posixpath.join(self.root.filename, self.at)
+
+    def __repr__(self):
+        return self.__repr.format(self=self)
+
+    def joinpath(self, *other):
+        next = posixpath.join(self.at, *map(_pathlib_compat, other))
+        return self._next(self.root.resolve_dir(next))
+
+    __truediv__ = joinpath
+
+    @property
+    def parent(self):
+        if not self.at:
+            return self.filename.parent
+        parent_at = posixpath.dirname(self.at.rstrip('/'))
+        if parent_at:
+            parent_at += '/'
+        return self._next(parent_at)
diff --git a/.venv/lib64 b/.venv/lib64
new file mode 120000
index 0000000..7951405
--- /dev/null
+++ b/.venv/lib64
@@ -0,0 +1 @@
+lib
\ No newline at end of file
diff --git a/.venv/pip-selfcheck.json b/.venv/pip-selfcheck.json
new file mode 100644
index 0000000..7585cca
--- /dev/null
+++ b/.venv/pip-selfcheck.json
@@ -0,0 +1 @@
+{"last_check":"2021-12-12T13:18:21Z","pypi_version":"21.3.1"}
\ No newline at end of file
diff --git a/.venv/pyvenv.cfg b/.venv/pyvenv.cfg
new file mode 100644
index 0000000..7f0d9af
--- /dev/null
+++ b/.venv/pyvenv.cfg
@@ -0,0 +1,3 @@
+home = /usr/bin
+include-system-site-packages = false
+version = 3.6.8
diff --git a/app.py b/app.py
index cad286e..1b09a85 100644
--- a/app.py
+++ b/app.py
@@ -1,11 +1,20 @@
 from flask import Flask
 from waitress import serve
+import socket
 
 app = Flask(__name__)
 
 @app.route('/')
 def hello():
-    return "Hello World!"
+    # return "Hello World!"
+    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    s.connect(("8.8.8.8", 80))
+    myip = s.getsockname()[0]
+    myname = socket.gethostbyaddr(socket.gethostname())[0]
+    s.close()
+    greeting = 'Hello World from {}.\n'.format(myname) # 1.1
+    return greeting
+
 
 if __name__ == '__main__':
     serve(app, host='0.0.0.0', port=8080)