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fix(email): Add ability to attach full first email text to avoid losing forwards, and to save .eml files for any incoming mesages, plus fix tests and some minor bugs

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Arkadiy Korotaev 2021-04-13 14:04:08 +02:00
parent 012ba4f42d
commit 2b4c82fd1b
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8 changed files with 128 additions and 30 deletions
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4
docs/settings.rst
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@ -223,3 +223,7 @@ The following settings were defined in previous versions and are no longer suppo
- **HELPDESK_FOOTER_SHOW_CHANGE_LANGUAGE_LINK** Is never shown. Use your own template if required.
- **HELPDESK_ENABLE_PER_QUEUE_MEMBERSHIP** Discontinued in favor of HELPDESK_ENABLE_PER_QUEUE_STAFF_PERMISSION.
- **HELPDESK_FULL_FIRST_MESSAGE_FROM_EMAIL** Do not ignore fowarded and replied text from the email messages which create a new ticket; useful for cases when customer forwards some email (error from service or something) and wants support to see that
- **HELPDESK_ALWAYS_SAVE_INCOMING_EMAIL_MESSAGE** Any incoming .eml message is saved and available, helps when customer spent some time doing fancy markup which has been corrupted during the email-to-ticket-comment translate process

3
helpdesk/.flake8 Normal file
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@ -0,0 +1,3 @@
[flake8]
max-line-length = 120
import-order-style = pep8

89
helpdesk/email.py
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@ -21,6 +21,7 @@ from os.path import isfile, join
from time import ctime
from bs4 import BeautifulSoup
from django.conf import settings as django_settings
from django.contrib.auth import get_user_model
from django.core.exceptions import ValidationError
from django.core.files.uploadedfile import SimpleUploadedFile
@ -394,7 +395,7 @@ def create_object_from_email_message(message, ticket_id, payload, files, logger)
title=_('E-Mail Received from %(sender_email)s' % {'sender_email': sender_email}),
date=now,
public=True,
comment=payload['body'],
comment=payload.get('full_body', payload['body']) or "",
message_id=message_id
)
@ -505,6 +506,7 @@ def object_from_message(message, queue, logger):
ticket = None
body = None
full_body = None
counter = 0
files = []
@ -523,7 +525,19 @@ def object_from_message(message, queue, logger):
if part['Content-Transfer-Encoding'] == '8bit' and part.get_content_charset() == 'utf-8':
body = body.decode('unicode_escape')
body = decodeUnknown(part.get_content_charset(), body)
body = EmailReplyParser.parse_reply(body)
# have to use django_settings here so overwritting it works in tests
# the default value is False anyway
if ticket is None and getattr(django_settings, 'HELPDESK_FULL_FIRST_MESSAGE_FROM_EMAIL', False):
# first message in thread, we save full body to avoid losing forwards and things like that
body_parts = []
for f in EmailReplyParser.read(body).fragments:
body_parts.append(f.content)
full_body = '\n\n'.join(body_parts)
body = EmailReplyParser.parse_reply(body)
else:
# second and other reply, save only first part of the message
body = EmailReplyParser.parse_reply(body)
full_body = body
# workaround to get unicode text out rather than escaped text
try:
body = body.encode('ascii').decode('unicode_escape')
@ -536,13 +550,23 @@ def object_from_message(message, queue, logger):
except UnicodeDecodeError:
email_body = encoding.smart_text(part.get_payload(decode=False))
payload = """
<html>
<head>
<meta charset="utf-8"/>
</head>
%s
</html>""" % email_body
if not body and not full_body:
# no text has been parsed so far - try such deep parsing for some messages
altered_body = email_body.replace("</p>", "</p>\n").replace("<br", "\n<br")
mail = BeautifulSoup(str(altered_body), "html.parser")
full_body = mail.get_text()
if "<body" not in email_body:
email_body = f"<body>{email_body}</body>"
payload = (
'<html>'
'<head>'
'<meta charset="utf-8" />'
'</head>'
'%s'
'</html>'
) % email_body
files.append(
SimpleUploadedFile(_("email_html_body.html"), payload.encode("utf-8"), 'text/html')
)
@ -554,22 +578,22 @@ def object_from_message(message, queue, logger):
else:
name = ("part-%i_" % counter) + name
# FIXME: this code gets the paylods, then does something with it and then completely ignores it
# writing the part.get_payload(decode=True) instead; and then the payload variable is
# replaced by some dict later.
# the `payloadToWrite` has been also ignored so was commented
payload = part.get_payload()
if isinstance(payload, list):
payload = payload.pop().as_string()
# payloadToWrite = payload
# check version of python to ensure use of only the correct error type
non_b64_err = TypeError
try:
logger.debug("Try to base64 decode the attachment payload")
# payloadToWrite = base64.decodebytes(payload)
except non_b64_err:
logger.debug("Payload was not base64 encoded, using raw bytes")
# payloadToWrite = payload
# # FIXME: this code gets the paylods, then does something with it and then completely ignores it
# # writing the part.get_payload(decode=True) instead; and then the payload variable is
# # replaced by some dict later.
# # the `payloadToWrite` has been also ignored so was commented
# payload = part.get_payload()
# if isinstance(payload, list):
# payload = payload.pop().as_string()
# # payloadToWrite = payload
# # check version of python to ensure use of only the correct error type
# non_b64_err = TypeError
# try:
# logger.debug("Try to base64 decode the attachment payload")
# # payloadToWrite = base64.decodebytes(payload)
# except non_b64_err:
# logger.debug("Payload was not base64 encoded, using raw bytes")
# # payloadToWrite = payload
files.append(SimpleUploadedFile(name, part.get_payload(decode=True), mimetypes.guess_type(name)[0]))
logger.debug("Found MIME attachment %s" % name)
@ -581,11 +605,25 @@ def object_from_message(message, queue, logger):
if beautiful_body:
try:
body = beautiful_body.text
full_body = body
except AttributeError:
pass
if not body:
body = ""
if getattr(django_settings, 'HELPDESK_ALWAYS_SAVE_INCOMING_EMAIL_MESSAGE', False):
# save message as attachment in case of some complex markup renders wrong
files.append(
SimpleUploadedFile(
_("original_message.eml").replace(
".eml",
timezone.localtime().strftime("_%d-%m-%Y_%H:%M") + ".eml"
),
str(message).encode("utf-8"),
'text/plain'
)
)
smtp_priority = message.get('priority', '')
smtp_importance = message.get('importance', '')
high_priority_types = {'high', 'important', '1', 'urgent'}
@ -593,6 +631,7 @@ def object_from_message(message, queue, logger):
payload = {
'body': body,
'full_body': full_body or body,
'subject': subject,
'queue': queue,
'sender_email': sender_email,

9
helpdesk/settings.py
View File

@ -162,3 +162,12 @@ HELPDESK_ENABLE_PER_QUEUE_STAFF_PERMISSION = getattr(
# use https in the email links
HELPDESK_USE_HTTPS_IN_EMAIL_LINK = getattr(settings, 'HELPDESK_USE_HTTPS_IN_EMAIL_LINK', False)
# Include all signatures and forwards in the first ticket message if set
# Useful if you get forwards dropped from them while they are useful part of request
HELPDESK_FULL_FIRST_MESSAGE_FROM_EMAIL = getattr(settings, 'HELPDESK_FULL_FIRST_MESSAGE_FROM_EMAIL', False)
# If set then we always save incoming emails as .eml attachments
# which is quite noisy but very helpful for complicated markup, forwards and so on
# (which gets stripped/corrupted otherwise)
HELPDESK_ALWAYS_SAVE_INCOMING_EMAIL_MESSAGE = getattr(settings, "HELPDESK_ALWAYS_SAVE_INCOMING_EMAIL_MESSAGE", False)

2
helpdesk/templates/helpdesk/ticket.html
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@ -50,7 +50,7 @@
</div>
<p class="mb-1">
{% if followup.comment %}
<p>{{ followup.get_markdown|urlizetrunc:50|num_to_link|linebreaksbr }}</p>
<p>{{ followup.get_markdown|urlizetrunc:50|num_to_link }}</p>
{% endif %}
{% for change in followup.ticketchange_set.all %}
{% if forloop.first %}<div class='changes'><ul>{% endif %}

4
helpdesk/templates/helpdesk/ticket_desc_table.html
View File

@ -56,7 +56,7 @@
<td class="{% if ticket.priority < 3 %}table-warning{% endif %}">{{ ticket.get_priority_display }}
</td>
<th class="table-active">{% trans "Copies To" %}</th>
<td>{{ ticketcc_string }} <a data-toggle='tooltip' href='{% url 'helpdesk:ticket_cc' ticket.id %}' title='{% trans "Click here to add / remove people who should receive an e-mail whenever this ticket is updated." %}'><strong><button type="button" class="btn btn-warning btn-sm float-right"><i class="fa fa-share"></i></button></strong></a>{% if SHOW_SUBSCRIBE %}, <strong><a data-toggle='tooltip' href='?subscribe' title='{% trans "Click here to subscribe yourself to this ticket, if you want to receive an e-mail whenever this ticket is updated." %}'><button type="button" class="btn btn-warning btn-sm float-right"><i class="fas fa-rss-square"></i></button></a></strong>{% endif %}</td>
<td>{{ ticketcc_string }} <a data-toggle='tooltip' href='{% url 'helpdesk:ticket_cc' ticket.id %}' title='{% trans "Click here to add / remove people who should receive an e-mail whenever this ticket is updated." %}'><strong><button type="button" class="btn btn-warning btn-sm float-right"><i class="fa fa-share"></i></button></strong></a>{% if SHOW_SUBSCRIBE %} <strong><a data-toggle='tooltip' href='?subscribe' title='{% trans "Click here to subscribe yourself to this ticket, if you want to receive an e-mail whenever this ticket is updated." %}'><button type="button" class="btn btn-warning btn-sm float-right"><i class="fas fa-rss-square"></i></button></a></strong>{% endif %}</td>
</tr>
<tr>
@ -99,7 +99,7 @@
<tr>
<td id="ticket-description" colspan='4'>
<h4>{% trans "Description" %}</h4>
{{ ticket.get_markdown|urlizetrunc:50|num_to_link|linebreaksbr }}</td>
{{ ticket.get_markdown|urlizetrunc:50|num_to_link }}</td>
</tr>
{% if ticket.resolution %}<tr>

27
helpdesk/tests/test_files/forwarded-message.eml Normal file
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@ -0,0 +1,27 @@
Return-Path: sender@domain.tld
To: recipient@domain.tld
From: The Sender <sender@domain.tld>
Subject: Test with original message from GitHub
Message-ID: <0d3a17d5-7136-75c0-c8ba-a7698c57ac42@gmail.com>
Date: Tue, 13 Apr 2021 12:56:39 +0200
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101
Thunderbird/78.8.1
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
Content-Language: en-US
This is email body
-----Original Message-----
From: GitHub <noreply@github.com>
Sent: Tuesday, 6 April 2021 9:09 AM
Subject: [GitHub API] Update notice for access token [SEC=UNOFFICIAL]
Hello there!
We noticed that, at April 5th, 2021 at 23:09 (UTC) your application accessed the GitHub API with a token that has an outdated format.
Thanks,
The GitHub Team

20
helpdesk/tests/test_get_email.py
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@ -1,5 +1,5 @@
# -*- coding: utf-8 -*-
from django.test import TestCase
from django.test import TestCase, override_settings
from django.core.management import call_command
from django.shortcuts import get_object_or_404
from django.contrib.auth.models import User
@ -84,9 +84,11 @@ class GetEmailCommonTests(TestCase):
self.assertEqual(ticket.title, "Testovácí email")
self.assertEqual(ticket.description, "íářčšáíéřášč")
@override_settings(HELPDESK_FULL_FIRST_MESSAGE_FROM_EMAIL=True)
def test_email_with_utf_8_non_decodable_sequences(self):
"""
Tests that emails with utf-8 non-decodable sequences are parsed correctly
The message is fowarded as well
"""
with open(os.path.join(THIS_DIR, "test_files/utf-nondecodable.eml")) as fd:
test_email = fd.read()
@ -99,6 +101,20 @@ class GetEmailCommonTests(TestCase):
attachment = attachments[0]
self.assertIn('prosazuje lepší', attachment.file.read().decode("utf-8"))
@override_settings(HELPDESK_FULL_FIRST_MESSAGE_FROM_EMAIL=True)
def test_email_with_forwarded_message(self):
"""
Forwarded message of that format must be still attached correctly
"""
with open(os.path.join(THIS_DIR, "test_files/forwarded-message.eml")) as fd:
test_email = fd.read()
ticket = helpdesk.email.object_from_message(test_email, self.queue_public, self.logger)
self.assertEqual(ticket.title, "Test with original message from GitHub")
self.assertIn("This is email body", ticket.description)
assert "Hello there!" not in ticket.description, ticket.description
assert FollowUp.objects.filter(ticket=ticket).count() == 1
assert "Hello there!" in FollowUp.objects.filter(ticket=ticket).first().comment
class GetEmailParametricTemplate(object):
"""TestCase that checks basic email functionality across methods and socks configs."""
@ -555,7 +571,7 @@ class GetEmailParametricTemplate(object):
self.assertEqual(followup1.ticket.id, 1)
attach1 = get_object_or_404(FollowUpAttachment, pk=1)
self.assertEqual(attach1.followup.id, 1)
self.assertEqual(attach1.filename, 'signature.asc')
self.assertEqual(attach1.filename, 'part-1_signature.asc')
self.assertEqual(attach1.file.read(), b"""-----BEGIN PGP SIGNATURE-----
iQIcBAEBCAAGBQJaA3dnAAoJELBLc7QPITnLN54P/3Zsu7+AIQWDFTvziJfCqswG