8000 gh-121650: Encode newlines in headers, and verify headers are sound by encukou · Pull Request #122233 · python/cpython · GitHub
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gh-121650: Encode newlines in headers, and verify headers are sound #122233

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Merged
merged 12 commits into from
Jul 30, 2024
Merged

gh-121650: Encode newlines in headers, and verify headers are sound #122233

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921cbfd
Verify that email headers are well-formed
encukou Jul 24, 2024
bd7f922
Encode header parts that contain newlines
encukou Jul 24, 2024
59c06c3
Add tests and documentation
encukou Jul 27, 2024
8e7d6f1
Add a blurb
encukou Jul 27, 2024
ef65562
Add the news to 3.13; there's still hope for backporting
encukou Jul 27, 2024
64dcb44
Don't mark up ``True``
encukou Jul 27, 2024
af41733
Document HeaderWriteError
encukou Jul 29, 2024
596a25b
Apply suggestions from code review
encukou Jul 30, 2024
d7f5fc6
Add missing colon
encukou Jul 30, 2024
a768a81
Only set want_encoding to True; don't reset it to False
encukou Jul 30, 2024
eb43fe4
Merge branch 'main' into gh-121650-email-newlines-in-headers
encukou Jul 30, 2024
f793b96
Update Lib/email/_header_value_parser.py
serhiy-storchaka Jul 30, 2024
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Update Lib/email/_header_value_parser.py
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@serhiy-storchaka
serhiy-storchaka authored Jul 30, 2024
commit f793b966f801605e56ff06f6b85eac0b8dd4aeea
14 changes: 7 additions & 7 deletions Lib/email/_header_value_parser.py
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Expand Up @@ -2804,13 +2804,13 @@ def _refold_parse_tree(parse_tree, *, policy):
wrap_as_ew_blocked -= 1
continue
tstr = str(part)
if part.token_type == 'ptext':
# Encode if tstr contains special characters.
if not SPECIALSNL.isdisjoint(tstr):
want_encoding = True
elif not NLSET.isdisjoint(tstr):
# Encode if tstr contains newlines.
want_encoding = True
if not want_encoding:
if part.token_type == 'ptext':
# Encode if tstr contains special characters.
want_encoding = not SPECIALSNL.isdisjoint(tstr)
else:
# Encode if tstr contains newlines.
want_encoding = not NLSET.isdisjoint(tstr)
try:
tstr.encode(encoding)
charset = encoding
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