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bpo-33972: Fix EmailMessage.iter_attachments raising AttributeError. (GH-14119)

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* bpo-33972: Fix EmailMessage.iter_attachments raising AttributeError.

When certain malformed messages have content-type set to 'mulitpart/*' but
still have a single part body, iter_attachments can raise AttributeError. This
patch fixes it by returning a None value instead when the body is single part.
This commit is contained in:
Abhilash Raj 2019-06-25 10:03:19 -07:00 • committed by Barry Warsaw
parent d7c87d982d
commit 02257012f6
3 changed files with 21 additions and 1 deletions
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9
Lib/test/test_email/test_message.py
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@ -929,6 +929,15 @@ class TestMIMEPart(TestEmailMessageBase, TestEmailBase):
m.set_content(content_manager=cm)
self.assertNotIn('MIME-Version', m)
def test_string_payload_with_multipart_content_type(self):
msg = message_from_string(textwrap.dedent("""\
Content-Type: multipart/mixed; charset="utf-8"
sample text
"""), policy=policy.default)
attachments = msg.iter_attachments()
self.assertEqual(list(attachments), [])
if __name__ == '__main__':
unittest.main()