MailSender.send: allow passing a charset.

Resolves Issue #348

scrapy/mail.py

@@ -43,7 +43,7 @@ class MailSender(object):
             settings['MAIL_PASS'], settings.getint('MAIL_PORT'),
             settings.getbool('MAIL_TLS'), settings.getbool('MAIL_SSL'))
 
-    def send(self, to, subject, body, cc=None, attachs=(), mimetype='text/plain', _callback=None):
+    def send(self, to, subject, body, cc=None, attachs=(), mimetype='text/plain', charset=None, _callback=None):
         if attachs:
             msg = MIMEMultipart()
         else:
@@ -57,8 +57,11 @@ class MailSender(object):
             rcpts.extend(cc)
             msg['Cc'] = COMMASPACE.join(cc)
 
+        if charset:
+            msg.set_charset(charset)
+
         if attachs:
-            msg.attach(MIMEText(body))
+            msg.attach(MIMEText(body, 'plain', charset or 'us-ascii'))
             for attach_name, mimetype, f in attachs:
                 part = MIMEBase(*mimetype.split('/'))
                 part.set_payload(f.read())

tests/test_mail.py

+# coding=utf-8
+
 import unittest
 from io import BytesIO
+from email.charset import Charset
 
 from scrapy.mail import MailSender
 
@@ -54,11 +57,58 @@ class MailSenderTest(unittest.TestCase):
 
         text, attach = payload
         self.assertEqual(text.get_payload(decode=True), b'body')
+        self.assertEqual(text.get_charset(), Charset('us-ascii'))
         self.assertEqual(attach.get_payload(decode=True), b'content')
 
     def _catch_mail_sent(self, **kwargs):
         self.catched_msg = dict(**kwargs)
 
+    def test_send_utf8(self):
+        subject = u'sübjèçt'
+        body = u'bödÿ-àéïöñß'
+        mailsender = MailSender(debug=True)
+        mailsender.send(to=['test@scrapy.org'], subject=subject, body=body,
+                        charset='utf-8', _callback=self._catch_mail_sent)
+
+        assert self.catched_msg
+        self.assertEqual(self.catched_msg['subject'], subject)
+        self.assertEqual(self.catched_msg['body'], body)
+
+        msg = self.catched_msg['msg']
+        self.assertEqual(msg['subject'], subject)
+        self.assertEqual(msg.get_payload(), body)
+        self.assertEqual(msg.get_charset(), Charset('utf-8'))
+        self.assertEqual(msg.get('Content-Type'), 'text/plain; charset="utf-8"')
+
+    def test_send_attach_utf8(self):
+        subject = u'sübjèçt'
+        body = u'bödÿ-àéïöñß'
+        attach = BytesIO()
+        attach.write(body.encode('utf-8'))
+        attach.seek(0)
+        attachs = [('attachment', 'text/plain', attach)]
+
+        mailsender = MailSender(debug=True)
+        mailsender.send(to=['test@scrapy.org'], subject=subject, body=body,
+                        attachs=attachs, charset='utf-8', _callback=self._catch_mail_sent)
+
+        assert self.catched_msg
+        self.assertEqual(self.catched_msg['subject'], subject)
+        self.assertEqual(self.catched_msg['body'], body)
+
+        msg = self.catched_msg['msg']
+        self.assertEqual(msg['subject'], subject)
+        self.assertEqual(msg.get_charset(), Charset('utf-8'))
+        self.assertEqual(msg.get('Content-Type'), 'multipart/mixed; charset="utf-8"')
+
+        payload = msg.get_payload()
+        assert isinstance(payload, list)
+        self.assertEqual(len(payload), 2)
+
+        text, attach = payload
+        self.assertEqual(text.get_payload(decode=True).decode('utf-8'), body)
+        self.assertEqual(text.get_charset(), Charset('utf-8'))
+        self.assertEqual(attach.get_payload(decode=True).decode('utf-8'), body)
 
 if __name__ == "__main__":
     unittest.main()