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[3.12] gh-100884: email/_header_value_parser: don't encode list separators (GH-100885) (GH-115592)

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ListSeparator should not be encoded. This could happen when a long line
pushes its separator to the next line, which would have been encoded.
(cherry picked from commit 09fab93c3d)

Co-authored-by: Thomas Weißschuh <thomas@t-8ch.de>
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Miss Islington (bot) 2024-02-17 14:00:39 +01:00 • committed by GitHub
parent 068e2190de
commit 9148b77e0a
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3 changed files with 9 additions and 1 deletions
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Lib/email/_header_value_parser.py
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@ -949,6 +949,7 @@ class _InvalidEwError(errors.HeaderParseError):
# up other parse trees. Maybe should have tests for that, too.
DOT = ValueTerminal('.', 'dot')
ListSeparator = ValueTerminal(',', 'list-separator')
ListSeparator.as_ew_allowed = False
RouteComponentMarker = ValueTerminal('@', 'route-component-marker')
#
@ -2022,7 +2023,7 @@ def get_address_list(value):
address_list.defects.append(errors.InvalidHeaderDefect(
"invalid address in address-list"))
if value: # Must be a , at this point.
address_list.append(ValueTerminal(',', 'list-separator'))
address_list.append(ListSeparator)
value = value[1:]
return address_list, value