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Fix message/rfc822 attachment processing

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This commit is contained in:
Miłosz Jerkiewicz 2020-05-29 15:22:01 +02:00
parent c8751f0c9a
commit 5bd961fae6
3 changed files with 99 additions and 2 deletions
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22
django_mailbox/models.py
View file

@ -246,7 +246,10 @@ class Mailbox(models.Model):
settings = utils.get_settings()
new = EmailMessage()
if msg.is_multipart():
if (
msg.is_multipart()
and not 'attachment' in msg.get('Content-Disposition', '')
):
for header, value in msg.items():
new[header] = value
for part in msg.get_payload():
@ -287,11 +290,21 @@ class Mailbox(models.Model):
attachment = MessageAttachment()
if msg.get_content_type() == 'message/rfc822':
attachment_payloads = msg.get_payload()
if len(attachment_payloads) != 1:
raise AssertionError(
"Attachment of type 'message/rfc822' "
'must have exactly 1 payload.'
)
attachment_payload = attachment_payloads[0].as_bytes()
else:
attachment_payload = msg.get_payload(decode=True)
attachment.document.save(
uuid.uuid4().hex + extension,
ContentFile(
BytesIO(
msg.get_payload(decode=True)
attachment_payload
).getvalue()
)
)
@ -767,6 +780,11 @@ class MessageAttachment(models.Model):
return email.message_from_string(headers)
def _set_dehydrated_headers(self, email_object):
if email_object._payload is None:
# otherwise it breaks in
# lib/python3.x/email/generator.py:_handle_message,
# line: "self._fp.write(payload)"
email_object._payload = ""
self.headers = email_object.as_string()
def __delitem__(self, name):

62
django_mailbox/tests/messages/message_with_rfc822_attachment.eml Normal file
View file

@ -0,0 +1,62 @@
From: Adam Coddington <test@adamcoddington.net>
To: Adam Coddington <test@adamcoddington.net>
Subject: Email with RFC 822 attachment
Date: Fri, 15 May 2020 11:15:00 +0000
Message-ID: <ce1f843c1a2d4de7a0c7c78c84a50f8d@adamcoddington.net>
Content-Type: multipart/mixed;
boundary="_004_ce1f843c1a2d4de7a0c7c78c84a50f8dadamcoddington.net_"
Return-Path: test@adamcoddington.net
MIME-Version: 1.0
--_004_ce1f843c1a2d4de7a0c7c78c84a50f8dadamcoddington.net_
Content-Type: multipart/alternative;
boundary="_000_ce1f843c1a2d4de7a0c7c78c84a50f8dadamcoddington.net_"
--_000_ce1f843c1a2d4de7a0c7c78c84a50f8dadamcoddington.net_
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Dear Sir or Madam,
I am sending you an email message as an attachment.
--_000_ce1f843c1a2d4de7a0c7c78c84a50f8dadamcoddington.net_
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<html xmlns=3D"http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-=
1">
</head>
<body>
<div>
<p>Dear Sir or Madam,</p>
<p>I am sending you an email message as an attachment.</p>
</div>
</body>
</html>
--_000_ce1f843c1a2d4de7a0c7c78c84a50f8dadamcoddington.net_--
--_004_ce1f843c1a2d4de7a0c7c78c84a50f8dadamcoddington.net_
Content-Type: message/rfc822
Content-Disposition: attachment;
creation-date="Fri, 15 May 2020 11:10:00 GMT";
modification-date="Fri, 15 May 2020 11:10:00 GMT"
From: Adam Coddington <test@adamcoddington.net>
To: Adam Coddington <test@adamcoddington.net>
Subject: Attached email
Date: Fri, 15 May 2020 09:00:00 +0000
Message-ID: <ujURpHHC.xh4Qpg28.RLQSSkBK.cQSyhEG5.PmxCEEdV@127.0.0.1>
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Hello!
This is the attached email.
--_004_ce1f843c1a2d4de7a0c7c78c84a50f8dadamcoddington.net_--

17
django_mailbox/tests/test_process_email.py
View file

@ -88,6 +88,23 @@ class TestProcessEmail(EmailMessageTestCase):
'heart.png',
)
def test_message_with_rfc822_attachment(self):
message = self._get_email_object('message_with_rfc822_attachment.eml')
mailbox = Mailbox.objects.create()
msg = mailbox.process_incoming_message(message)
expected_count = 1
actual_count = msg.attachments.count()
self.assertEqual(
expected_count,
actual_count,
)
attachment = msg.attachments.all()[0]
self.assertIsNone(attachment.get_filename())
def test_message_with_utf8_attachment_header(self):
""" Ensure that we properly handle UTF-8 encoded attachment