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bpo-35805: Add parser for Message-ID email header. (GH-13397)

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* bpo-35805: Add parser for Message-ID header.

This parser is based on the definition of Identification Fields from RFC 5322
Sec 3.6.4.

This should also prevent folding of Message-ID header using RFC 2047 encoded
words and hence fix bpo-35805.

* Prevent folding of non-ascii message-id headers.
* Add fold method to MsgID token to prevent folding.
This commit is contained in:
Abhilash Raj 2019-06-04 13:41:34 -04:00 • committed by Barry Warsaw
parent bc6469f79c
commit 46d88a1131
6 changed files with 257 additions and 28 deletions
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72
Lib/test/test_email/test__header_value_parser.py
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@ -2494,6 +2494,78 @@ class TestParser(TestParserMixin, TestEmailBase):
";foo", ";foo", ";foo", [errors.InvalidHeaderDefect]*3
)
# get_msg_id
def test_get_msg_id_valid(self):
msg_id = self._test_get_x(
parser.get_msg_id,
"<simeple.local@example.something.com>",
"<simeple.local@example.something.com>",
"<simeple.local@example.something.com>",
[],
'',
)
self.assertEqual(msg_id.token_type, 'msg-id')
def test_get_msg_id_obsolete_local(self):
msg_id = self._test_get_x(
parser.get_msg_id,
'<"simeple.local"@example.com>',
'<"simeple.local"@example.com>',
'<simeple.local@example.com>',
[errors.ObsoleteHeaderDefect],
'',
)
self.assertEqual(msg_id.token_type, 'msg-id')
def test_get_msg_id_non_folding_literal_domain(self):
msg_id = self._test_get_x(
parser.get_msg_id,
"<simple.local@[someexamplecom.domain]>",
"<simple.local@[someexamplecom.domain]>",
"<simple.local@[someexamplecom.domain]>",
[],
"",
)
self.assertEqual(msg_id.token_type, 'msg-id')
def test_get_msg_id_obsolete_domain_part(self):
msg_id = self._test_get_x(
parser.get_msg_id,
"<simplelocal@(old)example.com>",
"<simplelocal@(old)example.com>",
"<simplelocal@ example.com>",
[errors.ObsoleteHeaderDefect],
""
)
def test_get_msg_id_no_id_right_part(self):
msg_id = self._test_get_x(
parser.get_msg_id,
"<simplelocal>",
"<simplelocal>",
"<simplelocal>",
[errors.InvalidHeaderDefect],
""
)
self.assertEqual(msg_id.token_type, 'msg-id')
def test_get_msg_id_no_angle_start(self):
with self.assertRaises(errors.HeaderParseError):
parser.get_msg_id("msgwithnoankle")
def test_get_msg_id_no_angle_end(self):
msg_id = self._test_get_x(
parser.get_msg_id,
"<simplelocal@domain",
"<simplelocal@domain>",
"<simplelocal@domain>",
[errors.InvalidHeaderDefect],
""
)
self.assertEqual(msg_id.token_type, 'msg-id')
@parameterize
class Test_parse_mime_parameters(TestParserMixin, TestEmailBase):