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     reply_to = unicode(settings.DEFAULT_REPLY_TO_EMAIL)
  56
  57     try:
  58         connection = None
  59
  60         if sender is None:
  61             sender = str(settings.DEFAULT_FROM_EMAIL)
  62
  63         for recipient, subject, html, text, media in messages:
  64             if connection is None:
  65                 connection = create_connection()
  66
  67             msgRoot = MIMEMultipart('related')
  68
  69             msgRoot['Subject'] = Header(subject, 'utf-8')
  70             msgRoot['From'] = sender
  71
  72             to = Header(recipient.username, 'utf-8')
  73             to.append('<%s>' % recipient.email)
  74             msgRoot['To'] = to
  75
  76             if reply_to:
  77                 msgRoot['Reply-To'] = reply_to
  78
  79             msgRoot.preamble = 'This is a multi-part message from %s.' % unicode(settings.APP_SHORT_NAME).encode('utf8')
  80
  81             msgAlternative = MIMEMultipart('alternative')
  82             msgRoot.attach(msgAlternative)
  83
  84             msgAlternative.attach(MIMEText(text.encode('utf-8'), _charset='utf-8'))
  85             msgAlternative.attach(MIMEText(html.encode('utf-8'), 'html', _charset='utf-8'))
  86
  87             for alias, location in media.items():
  88                 fp = open(location, 'rb')
  89                 msgImage = MIMEImage(fp.read())
  90                 fp.close()
  91                 msgImage.add_header('Content-ID', '<'+alias+'>')
  92                 msgRoot.attach(msgImage)
  93
  94             try:
  95                 connection.sendmail(sender, [recipient.email], msgRoot.as_string())
  96             except SMTPRecipientsRefused, e:
  97                 logging.error("Email address not accepted.  Exception: %s" % e)
  98             except Exception, e:
  99                 logging.error("Couldn't send mail using the sendmail method: %s" % e)
 100                 try:
 101                     connection.quit()
 102                 except Exception, e:
 103                     logging.error(e)
 104                 finally:
 105                     connection = None
 106
 107         try:
 108             connection.quit()
 109         except AttributeError:
 110             pass
 111         except socket.sslerror:
 112             connection.close()
 113     except Exception, e:
 114         logging.error('Email sending has failed: %s' % e)