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[osqa.git] / forum / utils / mail.py
1 import email
2 import socket
3 import os
4 import logging
5
6 try:
7     from email.mime.multipart import MIMEMultipart
8     from email.mime.text import MIMEText
9     from email.mime.image import MIMEImage
10     from email.header import Header
11 except:
12     from email.MIMEMultipart import MIMEMultipart
13     from email.MIMEText import MIMEText
14     from email.MIMEImage import MIMEImage
15     from email.Header import Header
16
17 from django.core.mail import DNS_NAME
18 from smtplib import SMTP
19 from smtplib import SMTPRecipientsRefused
20 from forum import settings
21 from django.template import loader, Context, Template
22 from forum.utils.html import sanitize_html
23 from forum.context import application_settings
24 from forum.utils.html2text import HTML2Text
25 from threading import Thread
26
27 def send_template_email(recipients, template, context):
28     t = loader.get_template(template)
29     context.update(dict(recipients=recipients, settings=settings))
30     t.render(Context(context))
31
32 def create_connection():
33     connection = SMTP(str(settings.EMAIL_HOST), str(settings.EMAIL_PORT),
34                           local_hostname=DNS_NAME.get_fqdn())
35
36     if (bool(settings.EMAIL_USE_TLS)):
37         connection.ehlo()
38         connection.starttls()
39         connection.ehlo()
40
41     if settings.EMAIL_HOST_USER and settings.EMAIL_HOST_PASSWORD:
42         connection.login(str(settings.EMAIL_HOST_USER), str(settings.EMAIL_HOST_PASSWORD))
43
44     return connection
45
46
47 def create_and_send_mail_messages(messages):
48     if not settings.EMAIL_HOST:
49         return
50
51     sender = Header(unicode(settings.APP_SHORT_NAME), 'utf-8')
52     sender.append('<%s>' % unicode(settings.DEFAULT_FROM_EMAIL))
53     sender = u'%s <%s>' % (unicode(settings.APP_SHORT_NAME), unicode(settings.DEFAULT_FROM_EMAIL))
54
55     try:
56         connection = None
57
58         if sender is None:
59             sender = str(settings.DEFAULT_FROM_EMAIL)
60
61         for recipient, subject, html, text, media in messages:
62             if connection is None:
63                 connection = create_connection()
64
65             msgRoot = MIMEMultipart('related')
66
67             msgRoot['Subject'] = Header(subject, 'utf-8')
68             msgRoot['From'] = sender
69
70             to = Header(recipient.username, 'utf-8')
71             to.append('<%s>' % recipient.email)
72             msgRoot['To'] = to
73
74             msgRoot.preamble = 'This is a multi-part message from %s.' % unicode(settings.APP_SHORT_NAME).encode('utf8')
75
76             msgAlternative = MIMEMultipart('alternative')
77             msgRoot.attach(msgAlternative)
78
79             msgAlternative.attach(MIMEText(text.encode('utf-8'), _charset='utf-8'))
80             msgAlternative.attach(MIMEText(html.encode('utf-8'), 'html', _charset='utf-8'))
81
82             for alias, location in media.items():
83                 fp = open(location, 'rb')
84                 msgImage = MIMEImage(fp.read())
85                 fp.close()
86                 msgImage.add_header('Content-ID', '<'+alias+'>')
87                 msgRoot.attach(msgImage)
88
89             try:
90                 connection.sendmail(sender, [recipient.email], msgRoot.as_string())
91             except SMTPRecipientsRefused, e:
92                 logging.error("Email address not accepted.  Exception: %s" % e)
93             except Exception, e:
94                 logging.error("Couldn't send mail using the sendmail method: %s" % e)
95                 try:
96                     connection.quit()
97                     connection = None
98                 except Exception:
99                     connection = None
100
101         try:
102             connection.quit()
103         except socket.sslerror:
104             connection.close()
105     except Exception, e:
106         logging.error('Email sending has failed: %s' % e)