Fix UnicecodeDecodeError parsing email

imbox/parser.py

@@ -123,7 +123,7 @@ def decode_content(message):
 
 def parse_email(raw_email, policy=None):
     if isinstance(raw_email, binary_type):
-        raw_email = str_encode(raw_email, 'utf-8')
+        raw_email = str_encode(raw_email, 'utf-8', errors='ignore')
     if policy is not None:
         email_parse_kwargs = dict(policy=policy)
     else:

tests/8422.msg

@@ -0,0 +1,22 @@
+Delivered-To: receiver@example.com
+Return-Path: <sender@example.com>
+Date: Thu, 20 Jul 2017 07:34:22 -0500
+Message-ID: <59705CFE.A95F.0016.0@journeys.com>
+Subject: Following up Re: Looking to connect, let's schedule a call!
+From: sender@example.com
+To: "Receiver" <receiver@example.com>
+Mime-Version: 1.0
+Content-Type: multipart/mixed; boundary="=__PartBD85995F.0__="
+
+This is a MIME message. If you are reading this text, you may want to 
+consider changing to a mail reader or gateway that understands how to 
+properly handle MIME multipart messages.
+
+--=__PartBD85995F.0__=
+Content-Type: multipart/alternative; boundary="=__PartBD85995F.1__="
+
+--=__PartBD85995F.1__=
+Content-Type: text/plain; charset=Windows-1252
+Content-Transfer-Encoding: 8bit
+
+Following up on my previous message. I’d love to connect you with

tests/parser_tests.py

@@ -3,6 +3,7 @@ from __future__ import unicode_literals
 import unittest
 from imbox.parser import *
 
+import os
 import sys
 if sys.version_info.major < 3 or sys.version_info.minor < 3:
     SMTP = False
@@ -10,6 +11,9 @@ else:
     from email.policy import SMTP
 
 
+TEST_DIR = os.path.dirname(os.path.abspath(__file__))
+
+
 raw_email = """Delivered-To: johndoe@gmail.com
 X-Originating-Email: [martin@amon.cx]
 Message-ID: <test0@example.com>
@@ -98,6 +102,10 @@ class TestParser(unittest.TestCase):
         self.assertEqual('Выписка по карте', parsed_email.subject)
         self.assertEqual('Выписка по карте 1234', parsed_email.body['html'][0])
 
+    def test_parse_email_invalid_unicode(self):
+        parsed_email = parse_email(open(os.path.join(TEST_DIR, '8422.msg'), 'rb').read())
+        self.assertEqual("Following up Re: Looking to connect, let's schedule a call!", parsed_email.subject)
+
     def test_parse_email_ignores_header_casing(self):
         self.assertEqual('one', parse_email('Message-ID: one').message_id)
         self.assertEqual('one', parse_email('Message-Id: one').message_id)