1 """Sending Roundup-specific mail over SMTP.
2 """
3 __docformat__ = 'restructuredtext'
4 # $Id: mailer.py,v 1.22 2008-07-21 01:44:58 richard Exp $
6 import time, quopri, os, socket, smtplib, re, sys, traceback, email
8 from cStringIO import StringIO
10 from roundup import __version__
11 from roundup.date import get_timezone
13 from email.Utils import formatdate, formataddr
14 from email.Message import Message
15 from email.Header import Header
16 from email.MIMEText import MIMEText
17 from email.MIMEMultipart import MIMEMultipart
19 class MessageSendError(RuntimeError):
20 pass
22 def encode_quopri(msg):
23 orig = msg.get_payload()
24 encdata = quopri.encodestring(orig)
25 msg.set_payload(encdata)
26 del msg['Content-Transfer-Encoding']
27 msg['Content-Transfer-Encoding'] = 'quoted-printable'
29 class Mailer:
30 """Roundup-specific mail sending."""
31 def __init__(self, config):
32 self.config = config
34 # set to indicate to roundup not to actually _send_ email
35 # this var must contain a file to write the mail to
36 self.debug = os.environ.get('SENDMAILDEBUG', '') \
37 or config["MAIL_DEBUG"]
39 # set timezone so that things like formatdate(localtime=True)
40 # use the configured timezone
41 # apparently tzset doesn't exist in python under Windows, my bad.
42 # my pathetic attempts at googling a Windows-solution failed
43 # so if you're on Windows your mail won't use your configured
44 # timezone.
45 if hasattr(time, 'tzset'):
46 os.environ['TZ'] = get_timezone(self.config.TIMEZONE).tzname(None)
47 time.tzset()
49 def get_standard_message(self, to, subject, author=None, multipart=False):
50 '''Form a standard email message from Roundup.
52 "to" - recipients list
53 "subject" - Subject
54 "author" - (name, address) tuple or None for admin email
56 Subject and author are encoded using the EMAIL_CHARSET from the
57 config (default UTF-8).
59 Returns a Message object.
60 '''
61 # encode header values if they need to be
62 charset = getattr(self.config, 'EMAIL_CHARSET', 'utf-8')
63 tracker_name = unicode(self.config.TRACKER_NAME, 'utf-8')
64 if not author:
65 author = formataddr((tracker_name, self.config.ADMIN_EMAIL))
66 else:
67 name = unicode(author[0], 'utf-8')
68 author = formataddr((name, author[1]))
70 if multipart:
71 message = MIMEMultipart()
72 else:
73 message = Message()
74 message.set_type('text/plain')
75 message.set_charset(charset)
77 try:
78 message['Subject'] = subject.encode('ascii')
79 except UnicodeError:
80 message['Subject'] = Header(subject, charset)
81 message['To'] = ', '.join(to)
82 try:
83 message['From'] = author.encode('ascii')
84 except UnicodeError:
85 message['From'] = Header(author, charset)
86 message['Date'] = formatdate(localtime=True)
88 # add a Precedence header so autoresponders ignore us
89 message['Precedence'] = 'bulk'
91 # Add a unique Roundup header to help filtering
92 try:
93 message['X-Roundup-Name'] = tracker_name.encode('ascii')
94 except UnicodeError:
95 message['X-Roundup-Name'] = Header(tracker_name, charset)
97 # and another one to avoid loops
98 message['X-Roundup-Loop'] = 'hello'
99 # finally, an aid to debugging problems
100 message['X-Roundup-Version'] = __version__
102 message['MIME-Version'] = '1.0'
104 return message
106 def standard_message(self, to, subject, content, author=None):
107 """Send a standard message.
109 Arguments:
110 - to: a list of addresses usable by rfc822.parseaddr().
111 - subject: the subject as a string.
112 - content: the body of the message as a string.
113 - author: the sender as a (name, address) tuple
115 All strings are assumed to be UTF-8 encoded.
116 """
117 message = self.get_standard_message(to, subject, author)
118 message.set_payload(content)
119 encode_quopri(message)
120 self.smtp_send(to, str(message))
122 def bounce_message(self, bounced_message, to, error,
123 subject='Failed issue tracker submission'):
124 """Bounce a message, attaching the failed submission.
126 Arguments:
127 - bounced_message: an RFC822 Message object.
128 - to: a list of addresses usable by rfc822.parseaddr(). Might be
129 extended or overridden according to the config
130 ERROR_MESSAGES_TO setting.
131 - error: the reason of failure as a string.
132 - subject: the subject as a string.
134 """
135 # see whether we should send to the dispatcher or not
136 dispatcher_email = getattr(self.config, "DISPATCHER_EMAIL",
137 getattr(self.config, "ADMIN_EMAIL"))
138 error_messages_to = getattr(self.config, "ERROR_MESSAGES_TO", "user")
139 if error_messages_to == "dispatcher":
140 to = [dispatcher_email]
141 elif error_messages_to == "both":
142 to.append(dispatcher_email)
144 message = self.get_standard_message(to, subject)
146 # add the error text
147 part = MIMEText(error)
148 message.attach(part)
150 # attach the original message to the returned message
151 try:
152 bounced_message.rewindbody()
153 except IOError, message:
154 body.write("*** couldn't include message body: %s ***"
155 % bounced_message)
156 else:
157 body.write(bounced_message.fp.read())
158 part = MIMEText(bounced_message.fp.read())
159 part['Content-Disposition'] = 'attachment'
160 for header in bounced_message.headers:
161 part.write(header)
162 message.attach(part)
164 # send
165 try:
166 self.smtp_send(to, str(message))
167 except MessageSendError:
168 # squash mail sending errors when bouncing mail
169 # TODO this *could* be better, as we could notify admin of the
170 # problem (even though the vast majority of bounce errors are
171 # because of spam)
172 pass
174 def exception_message(self):
175 '''Send a message to the admins with information about the latest
176 traceback.
177 '''
178 subject = '%s: %s'%(self.config.TRACKER_NAME, sys.exc_info()[1])
179 to = [self.config.ADMIN_EMAIL]
180 content = '\n'.join(traceback.format_exception(*sys.exc_info()))
181 self.standard_message(to, subject, content)
183 def smtp_send(self, to, message):
184 """Send a message over SMTP, using roundup's config.
186 Arguments:
187 - to: a list of addresses usable by rfc822.parseaddr().
188 - message: a StringIO instance with a full message.
189 """
190 if self.debug:
191 # don't send - just write to a file
192 open(self.debug, 'a').write('FROM: %s\nTO: %s\n%s\n' %
193 (self.config.ADMIN_EMAIL,
194 ', '.join(to), message))
195 else:
196 # now try to send the message
197 try:
198 # send the message as admin so bounces are sent there
199 # instead of to roundup
200 smtp = SMTPConnection(self.config)
201 smtp.sendmail(self.config.ADMIN_EMAIL, to, message)
202 except socket.error, value:
203 raise MessageSendError("Error: couldn't send email: "
204 "mailhost %s"%value)
205 except smtplib.SMTPException, msg:
206 raise MessageSendError("Error: couldn't send email: %s"%msg)
208 class SMTPConnection(smtplib.SMTP):
209 ''' Open an SMTP connection to the mailhost specified in the config
210 '''
211 def __init__(self, config):
212 smtplib.SMTP.__init__(self, config.MAILHOST, port=config['MAIL_PORT'],
213 local_hostname=config['MAIL_LOCAL_HOSTNAME'])
215 # start the TLS if requested
216 if config["MAIL_TLS"]:
217 self.ehlo()
218 self.starttls(config["MAIL_TLS_KEYFILE"],
219 config["MAIL_TLS_CERTFILE"])
221 # ok, now do we also need to log in?
222 mailuser = config["MAIL_USERNAME"]
223 if mailuser:
224 self.login(mailuser, config["MAIL_PASSWORD"])
226 # vim: set et sts=4 sw=4 :