Add mail-sending module. It uses the django settings file for several

bits of configuration (e.g., mail server, any authentication required,
etc.)  It has different behavior based on the setting of the
SERVER_MODE setting:

 - 'development' or 'test': the message will be sent as an attachment
   to ietf.tracker.archive+SERVER_MODE@gmail.com; the actual destination
   supplied won't be used.

 - 'production': the message will be sent to the addressees and a
   copy sent to ietf.tracker.archive+production@gmail.com .

There are several functions to call, depending on what you want
to pass:

 - send_mail_text() takes a request, "To:" list, From header (or None
   to default), Subject text, Body text, an optional Cc: list, and
   an optional dict with extra headers.

 - send_mail() takes a template and a context instead of the body text,
   and renders the template with the given context.

 - send_mail_subj() takes a template for the subject as well as for the
   body.  It uses the same context to render both templates.
 - Legacy-Id: 159

Author: fenner

ietf/settings.py

@@ -14,8 +14,10 @@
 TEMPLATE_DEBUG = DEBUG
 
 ADMINS = (
-    ('Bill Fenner', 'fenner@research.att.com'),
+    ('IETF Django Developers', 'django-project@ietf.org'),
+    ('GMail Tracker Archive', 'ietf.tracker.archive+errors@gmail.com'),
 )
+DEFAULT_FROM_EMAIL = 'IETF Secretariat <ietf-secretariat-reply@ietf.org>'
 
 MANAGERS = ADMINS
 
@@ -121,6 +123,11 @@
         '2001:16d8:ff54::1',
 )
 
+# Valid values:
+# 'production', 'test', 'development'
+# Override this in settings_local.py if it's not true
+SERVER_MODE = 'development'
+
 # Put SECRET_KEY in here, or any other sensitive or site-specific
 # changes.  DO NOT commit settings_local.py to svn.
 from settings_local import *

ietf/utils/mail.py

@@ -0,0 +1,98 @@
+from email.Utils import *
+from email.MIMEText import MIMEText
+from email.MIMEMessage import MIMEMessage
+from email.MIMEMultipart import MIMEMultipart
+import smtplib
+from django.conf import settings
+from django.template.loader import render_to_string
+from django.template import RequestContext
+
+def add_headers(msg):
+    if not(msg.has_key('Message-ID')):
+	msg['Message-ID'] = make_msgid('idtracker')
+    if not(msg.has_key('Date')):
+	msg['Date'] = formatdate(time.time(), True)
+    if not(msg.has_key('From')):
+	msg['From'] = settings.DEFAULT_FROM_EMAIL
+    return msg
+
+def send_smtp(msg):
+    '''
+    Send a Message via SMTP, based on the django email server settings.
+    The destination list will be taken from the To:/Cc: headers in the
+    Message.  The From address will be used if present or will default
+    to the django setting DEFAULT_FROM_EMAIL
+    '''
+    add_headers(msg)
+    (fname, frm) = parseaddr(msg.get('From'))
+    to = [addr for name, addr in getaddresses(msg.get_all('To') + msg.get_all('Cc', []))]
+    # todo: exception handling
+    server = smtplib.SMTP(settings.EMAIL_HOST, settings.EMAIL_PORT)
+    if settings.DEBUG:
+	server.set_debuglevel(1)
+    if settings.EMAIL_HOST_USER and settings.EMAIL_HOST_PASSWORD:
+	server.login(settings.EMAIL_HOST_USER, settings.EMAIL_HOST_PASSWORD)
+    server.sendmail(frm, to, msg.as_string())
+    server.quit()
+
+def copy_email(msg, to):
+    '''
+    Send a copy of the given email message to the given recipient.
+    '''
+    add_headers(msg)
+    new = MIMEMultipart()
+    # get info for first part.
+    # Mode: if it's production, then "copy of a message", otherwise
+    #  "this is a message that would have been sent from"
+    # hostname?
+    # django settings if debugging?
+    # Should this be a template?
+    if settings.SERVER_MODE == 'production':
+	new.attach(MIMEText("This is a copy of a message sent from the I-D tracker."))
+    else:
+	new.attach(MIMEText("The attached message would have been sent, but the tracker is in %s mode.\nIt was not sent to anybody.\n" % settings.SERVER_MODE))
+    new.attach(MIMEMessage(msg))
+    new['From'] = msg['From']
+    new['Subject'] = '[Django %s] %s' % (settings.SERVER_MODE, msg.get('Subject', '[no subject]'))
+    new['To'] = to
+    send_smtp(new)
+
+def send_mail_subj(request, to, frm, stemplate, template, context, cc=None, extra=None):
+    '''
+    Send an email message, exactly as send_mail(), but the
+    subject field is a template.
+    '''
+    subject = render_to_string(template, context, context_instance=RequestContext(request))
+    return send_mail(request, to, frm, subject, template, context, cc, extra)
+
+def send_mail(request, to, frm, subject, template, context, cc=None, extra=None):
+    '''
+    Send an email to the destination [list], with the given return
+    address (or "None" to use the default in settings.py).
+    The body is a text/plain rendering of the template with the context.
+    extra is a dict of extra headers to add.
+    '''
+    txt = render_to_string(template, context, context_instance=RequestContext(request))
+    return send_mail_text(request, to, frm, subject, txt, cc, extra)
+
+def send_mail_text(request, to, frm,subject, txt, cc=None, extra=None):
+    msg = MIMEText(txt)
+    if isinstance(frm, tuple):
+	frm = formataddr(frm)
+    if isinstance(to, list) or isinstance(to, tuple):
+        to = ", ".join([isinstance(addr, tuple) and formataddr(addr) or addr for addr in to])
+    if isinstance(cc, list) or isinstance(cc, tuple):
+        cc = ", ".join([isinstance(addr, tuple) and formataddr(addr) or addr for addr in cc])
+    if frm:
+	msg['From'] = frm
+    msg['To'] = to
+    if cc:
+	msg['Cc'] = cc
+    msg['Subject'] = subject
+    msg['X-Test-IDTracker'] = (settings.SERVER_MODE == 'production') and 'no' or 'yes'
+    if extra:
+	for k, v in extra.iteritems():
+	    msg[k] = v
+    if settings.SERVER_MODE == 'production':
+	send_smtp(msg)
+    copy_email(msg, "ietf.tracker.archive+%s@gmail.com" % settings.SERVER_MODE)