bpo-30681: Support invalid date format or value#2254
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In
email.utils.parsedate_to_datetime(), check failure to parse date, or invalid date components (such as hour outside 0..23), and return None rather than raising an exception.Add tests to test_email/test_utils.py to confirm this behaviour.
In
email.headerregistry.DateHeader.parse(), check whenparsedate_to_datetime()returnsNoneand add a defect; preserve the invalid value as the string value of the header, but set thedatetimeattribute toNone.Add tests to test_email/test_headerregistry.py to confirm this behaviour; also added test to test_email/test_inversion.py to confirm emails with such defective date headers round trip successfully.
This pull request incorporates feedback gratefully received from @bitdancer, @brettcannon and @Mariatta.
https://bugs.python.org/issue30681