cpython/Lib/email
Petr Viktorin 0976339818
gh-121650: Encode newlines in headers, and verify headers are sound (GH-122233)
## Encode header parts that contain newlines

Per RFC 2047:

> [...] these encoding schemes allow the
> encoding of arbitrary octet values, mail readers that implement this
> decoding should also ensure that display of the decoded data on the
> recipient's terminal will not cause unwanted side-effects

It seems that the "quoted-word" scheme is a valid way to include
a newline character in a header value, just like we already allow
undecodable bytes or control characters.
They do need to be properly quoted when serialized to text, though.


## Verify that email headers are well-formed

This should fail for custom fold() implementations that aren't careful
about newlines.


Co-authored-by: Bas Bloemsaat <bas@bloemsaat.org>
Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
2024-07-31 00:19:48 +02:00
..
mime Remove almost all unpaired backticks in docstrings (#119231) 2024-05-22 12:35:18 -04:00
__init__.py gh-102507 Remove invisible pagebreak characters (#102531) 2023-03-08 13:58:14 +00:00
_encoded_words.py
_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 Remove almost all unpaired backticks in docstrings (#119231) 2024-05-22 12:35:18 -04:00
_policybase.py gh-121650: Encode newlines in headers, and verify headers are sound (GH-122233) 2024-07-31 00:19:48 +02:00
architecture.rst
base64mime.py Remove almost all unpaired backticks in docstrings (#119231) 2024-05-22 12:35:18 -04:00
charset.py Remove almost all unpaired backticks in docstrings (#119231) 2024-05-22 12:35:18 -04:00
contentmanager.py
encoders.py gh-102507 Remove invisible pagebreak characters (#102531) 2023-03-08 13:58:14 +00:00
errors.py gh-121650: Encode newlines in headers, and verify headers are sound (GH-122233) 2024-07-31 00:19:48 +02:00
feedparser.py gh-106186: Don't report MultipartInvariantViolationDefect for valid multipart emails when parsing header only (#107016) 2023-07-23 12:25:18 +02:00
generator.py gh-121650: Encode newlines in headers, and verify headers are sound (GH-122233) 2024-07-31 00:19:48 +02:00
header.py Remove almost all unpaired backticks in docstrings (#119231) 2024-05-22 12:35:18 -04:00
headerregistry.py
iterators.py Remove almost all unpaired backticks in docstrings (#119231) 2024-05-22 12:35:18 -04:00
message.py Remove almost all unpaired backticks in docstrings (#119231) 2024-05-22 12:35:18 -04:00
parser.py Remove almost all unpaired backticks in docstrings (#119231) 2024-05-22 12:35:18 -04:00
policy.py gh-117313: Fix re-folding email messages containing non-standard line separators (GH-117369) 2024-04-17 13:00:25 +03:00
quoprimime.py Remove almost all unpaired backticks in docstrings (#119231) 2024-05-22 12:35:18 -04:00
utils.py gh-121905: Consistently use "floating-point" instead of "floating point" (GH-121907) 2024-07-19 08:06:02 +00:00