classHttpRequestParser: def__init__(self, protocol): """HttpRequestParser protocol -- a Python object with the following methods (all optional): - on_message_begin() - on_url(url: bytes) - on_header(name: bytes, value: bytes) - on_headers_complete() - on_body(body: bytes) - on_message_complete() - on_chunk_header() - on_chunk_complete() - on_status(status: bytes) """defget_http_version(self) ->str: """Return an HTTP protocol version."""defshould_keep_alive(self) ->bool: """Return ``True`` if keep-alive mode is preferred."""defshould_upgrade(self) ->bool: """Return ``True`` if the parsed request is a valid Upgrade request. The method exposes a flag set just before on_headers_complete. Calling this method earlier will only yield `False`. """deffeed_data(self, data: bytes): """Feed data to the parser. Will eventually trigger callbacks on the ``protocol`` object. On HTTP upgrade, this method will raise an ``HttpParserUpgrade`` exception, with its sole argument set to the offset of the non-HTTP data in ``data``. """defget_method(self) ->bytes: """Return HTTP request method (GET, HEAD, etc)"""classHttpResponseParser: """Has all methods except ``get_method()`` that HttpRequestParser has."""defget_status_code(self) ->int: """Return the status code of the HTTP response"""defparse_url(url: bytes): """Parse URL strings into a structured Python object. Returns an instance of ``httptools.URL`` class with the following attributes: - schema: bytes - host: bytes - port: int - path: bytes - query: bytes - fragment: bytes - userinfo: bytes """