Merge pull request #1080 from django-helpdesk/support_for_email_with_attached_multipart

Support for email with attached multipart

helpdesk/email.py

@@ -687,8 +687,8 @@ def extract_part_data(
             name = f"part-{counter}{ext}"
         else:
             name = f"part-{counter}_{name}"
-
-        files.append(SimpleUploadedFile(name, part.get_payload(decode=True), mimetypes.guess_type(name)[0]))
+        payload = part.as_string() if part.is_multipart() else part.get_payload(decode=True)
+        files.append(SimpleUploadedFile(name, payload, mimetypes.guess_type(name)[0]))
         logger.debug("Found MIME attachment %s", name)
     return part_body, part_full_body
 

helpdesk/tests/test_get_email.py

@@ -12,7 +12,7 @@ import helpdesk.email
 from helpdesk.email import extract_part_data, object_from_message
 from helpdesk.exceptions import DeleteIgnoredTicketException, IgnoreTicketException
 from helpdesk.management.commands.get_email import Command
-from helpdesk.models import FollowUp, FollowUpAttachment, IgnoreEmail, Queue, Ticket, TicketCC
+from helpdesk.models import Attachment, FollowUp, FollowUpAttachment, IgnoreEmail, Queue, Ticket, TicketCC
 from helpdesk.tests import utils
 import itertools
 import logging
@@ -231,6 +231,29 @@ class GetEmailCommonTests(TestCase):
         followup = ticket.followup_set.get()
         self.assertEqual(1, followup.followupattachment_set.count())
 
+    def test_email_with_multipart_as_attachment(self):
+        """
+        Is a multipart attachment to an email correctly saved as an attachment
+        """
+        att_filename = 'email_attachment.eml'
+        message, _, _ = utils.generate_multipart_email(type_list=['plain', 'html'])
+        email_attachment, _, _ = utils.generate_multipart_email(type_list=['plain', 'html'])
+        att_content = email_attachment.as_string()
+        message.attach(utils.generate_file_mime_part(filename=att_filename, content=att_content))
+
+        object_from_message(message.as_string(), self.queue_public, self.logger)
+
+        self.assertEqual(len(mail.outbox), 1)
+        self.assertEqual(f'[test-1] {message.get("subject")} (Opened)', mail.outbox[0].subject)
+
+        ticket = Ticket.objects.get()
+        followup = ticket.followup_set.get()
+        att_retrieved: Attachment = followup.followupattachment_set.get()
+        self.assertTrue(att_retrieved.filename.endswith(att_filename), "Filename of attached multipart not detected: %s" % (att_retrieved.filename))
+        with att_retrieved.file.open('r') as f:
+            retrieved_content = f.read()
+            self.assertEquals(att_content, retrieved_content, "Retrieved attachment content different to original :\n\n%s\n\n%s" % (att_content, retrieved_content))
+
         
 class GetEmailParametricTemplate(object):
     """TestCase that checks basic email functionality across methods and socks configs."""

helpdesk/tests/utils.py

@@ -141,14 +141,15 @@ def generate_email_address(
     # format email address for RFC 2822 and return
     return email.utils.formataddr((real_name, email_address)), email_address, first_name, last_name
 
-def generate_file_mime_part(locale: str="en_US",filename: str = None) -> Message:
+def generate_file_mime_part(locale: str="en_US",filename: str = None, content: str = None) -> Message:
     """
     
     :param locale: change this to generate locale specific file name and attachment content
     :param filename: pass a file name if you want to specify a specific name otherwise a random name will be generated
+    :param content: pass a string value if you want have specific content otherwise a random string will be generated
     """
     part = MIMEBase('application', 'octet-stream')
-    part.set_payload(get_fake("text", locale=locale, min_length=1024))
+    part.set_payload(get_fake("text", locale=locale, min_length=1024) if content is None else content)
     encoders.encode_base64(part)
     if not filename:
         filename = get_fake("word", locale=locale, min_length=8) + ".txt"
@@ -227,7 +228,7 @@ def generate_mime_part(locale: str="en_US",
     return msg
 
 def generate_multipart_email(locale: str="en_US",
-        type_list: typing.List[str]=["plain", "html", "attachment"],
+        type_list: typing.List[str]=["plain", "html", "image"],
         use_short_email: bool=False
         ) -> typing.Tuple[Message, typing.Tuple[str, str], typing.Tuple[str, str]]:
     """

helpdesk/views/staff.py

@@ -10,7 +10,7 @@ from ..lib import format_time_spent
 from ..templated_email import send_templated_mail
 from collections import defaultdict
 from copy import deepcopy
-from datetime import date, datetime, timedelta
+from datetime import datetime, timedelta
 from django.conf import settings
 from django.contrib.auth import get_user_model
 from django.contrib.auth.decorators import user_passes_test