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RanKKI a62ba52f14
gh-98188: Fix EmailMessage.get_payload to decode data when CTE value has extra text (#127547) 
Up to this point message handling has been very strict with regards to content encoding values: mixed case was accepted, but trailing blanks or other text would cause decoding failure, even if the first token was a valid encoding.  By Postel's Rule we should go ahead and decode as long as we can recognize that first token.  We have not thought of any security or backward compatibility concerns with this fix.

This fix does introduce a new technique/pattern to the Message code: we look to see if the header has a 'cte' attribute, and if so we use that.  This effectively promotes the header API exposed by HeaderRegistry to an API that any header parser "should" support.  This seems like a reasonable thing to do.  It is not, however, a requirement, as the string value of the header is still used if there is no cte attribute.

The full fix (ignore any trailing blanks or blank-separated trailing text) applies only to the non-compat32 API.  compat32 is only fixed to the extent that it now ignores trailing spaces.  Note that the HeaderRegistry parsing still records a HeaderDefect if there is extra text.

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
 		2025-01-05 20:32:16 -05:00
..
mime gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
__init__.py gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
_encoded_words.py bpo-43323: Fix UnicodeEncodeError in the email module (GH-32137) 2022-04-30 13:17:23 +03:00
_header_value_parser.py gh-121650: Encode newlines in headers, and verify headers are sound (GH-122233) 2024-07-31 00:19:48 +02:00
_parseaddr.py gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
_policybase.py gh-124452: Fix header mismatches when folding/unfolding with email message (#125919) 2024-11-16 18:01:52 -05:00
architecture.rst Fix typos in multiple `.rst` files (#1668) 2017-05-19 23:37:57 +03:00
base64mime.py gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
charset.py gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
contentmanager.py bpo-46565: `del` loop vars that are leaking into module namespaces (GH-30993) 2022-02-03 11:20:08 +02:00
encoders.py gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
errors.py gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
feedparser.py gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
generator.py gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
header.py gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
headerregistry.py bpo-26579: Add object.__getstate__(). (GH-2821) 2022-04-06 20:00:14 +03:00
iterators.py gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
message.py gh-98188: Fix EmailMessage.get_payload to decode data when CTE value has extra text (#127547) 2025-01-05 20:32:16 -05:00
parser.py gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
policy.py gh-124452: Fix header mismatches when folding/unfolding with email message (#125919) 2024-11-16 18:01:52 -05:00
quoprimime.py gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00
utils.py gh-126133: Only use start year in PSF copyright, remove end years (#126236) 2024-11-12 15:59:19 +02:00