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, sender=None):
  28     t = loader.get_template(template)
  29     context.update(dict(recipients=recipients, settings=settings, sender=sender))
  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, sender_data=None):
  48     if not settings.EMAIL_HOST:
  49         return
  50
  51     sender = Header(unicode(settings.APP_SHORT_NAME), 'utf-8')
  52
  53     if sender_data == None:
  54         sender.append('<%s>' % unicode(settings.DEFAULT_FROM_EMAIL))
  55         sender = u'%s <%s>' % (unicode(settings.APP_SHORT_NAME), unicode(settings.DEFAULT_FROM_EMAIL))
  56     else:
  57         sender.append('<%s>' % unicode(sender_data['email']))
  58         sender = u'%s <%s>' % (unicode(sender_data['name']), unicode(sender_data['email']))
  59
  60
  61     reply_to = unicode(settings.DEFAULT_REPLY_TO_EMAIL)
  62
  63     try:
  64         connection = None
  65
  66         if sender is None:
  67             sender = str(settings.DEFAULT_FROM_EMAIL)
  68
  69         for recipient, subject, html, text, media in messages:
  70             if connection is None:
  71                 connection = create_connection()
  72
  73             msgRoot = MIMEMultipart('related')
  74
  75             msgRoot['Subject'] = Header(subject, 'utf-8')
  76             msgRoot['From'] = sender
  77
  78             to = Header(u"%s <%s>" % (recipient.username, recipient.email), 'utf-8')
  79             msgRoot['To'] = to
  80
  81             if reply_to:
  82                 msgRoot['Reply-To'] = reply_to
  83
  84             msgRoot.preamble = 'This is a multi-part message from %s.' % unicode(settings.APP_SHORT_NAME).encode('utf8')
  85
  86             msgAlternative = MIMEMultipart('alternative')
  87             msgRoot.attach(msgAlternative)
  88
  89             msgAlternative.attach(MIMEText(text.encode('utf-8'), _charset='utf-8'))
  90             msgAlternative.attach(MIMEText(html.encode('utf-8'), 'html', _charset='utf-8'))
  91
  92             for alias, location in media.items():
  93                 fp = open(location, 'rb')
  94                 msgImage = MIMEImage(fp.read())
  95                 fp.close()
  96                 msgImage.add_header('Content-ID', '<'+alias+'>')
  97                 msgRoot.attach(msgImage)
  98
  99             try:
 100                 connection.sendmail(sender, [recipient.email], msgRoot.as_string())
 101             except SMTPRecipientsRefused, e:
 102                 logging.error("Email address not accepted.  Exception: %s" % e)
 103             except Exception, e:
 104                 logging.error("Couldn't send mail using the sendmail method: %s" % e)
 105                 try:
 106                     connection.quit()
 107                 except Exception, e:
 108                     logging.error(e)
 109                 finally:
 110                     connection = None
 111
 112         try:
 113             connection.quit()
 114         except AttributeError:
 115             pass
 116         except socket.sslerror:
 117             connection.close()
 118     except Exception, e:
 119         logging.error('Email sending has failed: %s' % e)