1
# Copyright (C) 2007 Canonical Ltd
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
from __future__ import absolute_import
19
"""A convenience class around smtplib."""
21
from email import Utils
30
from bzrlib.errors import (
33
DefaultSMTPConnectionRefused,
34
SMTPConnectionRefused,
38
class SMTPConnection(object):
39
"""Connect to an SMTP server and send an email.
41
This is a gateway between bzrlib.config.Config and smtplib.SMTP. It
42
understands the basic bzr SMTP configuration information: smtp_server,
43
smtp_username, and smtp_password.
46
_default_smtp_server = 'localhost'
48
def __init__(self, config, _smtp_factory=None):
49
self._smtp_factory = _smtp_factory
50
if self._smtp_factory is None:
51
self._smtp_factory = smtplib.SMTP
53
self._config_smtp_server = config.get_user_option('smtp_server')
54
self._smtp_server = self._config_smtp_server
55
if self._smtp_server is None:
56
self._smtp_server = self._default_smtp_server
58
self._smtp_username = config.get_user_option('smtp_username')
59
self._smtp_password = config.get_user_option('smtp_password')
61
self._connection = None
64
"""If we haven't connected, connect and authenticate."""
65
if self._connection is not None:
68
self._create_connection()
69
# FIXME: _authenticate() should only be called when the server has
70
# refused unauthenticated access, so it can safely try to authenticate
71
# with the default username. JRV20090407
74
def _create_connection(self):
75
"""Create an SMTP connection."""
76
self._connection = self._smtp_factory()
78
self._connection.connect(self._smtp_server)
79
except socket.error, e:
80
if e.args[0] == errno.ECONNREFUSED:
81
if self._config_smtp_server is None:
82
raise DefaultSMTPConnectionRefused(socket.error,
85
raise SMTPConnectionRefused(socket.error,
90
# Say EHLO (falling back to HELO) to query the server's features.
91
code, resp = self._connection.ehlo()
92
if not (200 <= code <= 299):
93
code, resp = self._connection.helo()
94
if not (200 <= code <= 299):
95
raise SMTPError("server refused HELO: %d %s" % (code, resp))
97
# Use TLS if the server advertised it:
98
if self._connection.has_extn("starttls"):
99
code, resp = self._connection.starttls()
100
if not (200 <= code <= 299):
101
raise SMTPError("server refused STARTTLS: %d %s" % (code, resp))
102
# Say EHLO again, to check for newly revealed features
103
code, resp = self._connection.ehlo()
104
if not (200 <= code <= 299):
105
raise SMTPError("server refused EHLO: %d %s" % (code, resp))
107
def _authenticate(self):
108
"""If necessary authenticate yourself to the server."""
109
auth = config.AuthenticationConfig()
110
if self._smtp_username is None:
111
# FIXME: Since _authenticate gets called even when no authentication
112
# is necessary, it's not possible to use the default username
114
self._smtp_username = auth.get_user('smtp', self._smtp_server)
115
if self._smtp_username is None:
118
if self._smtp_password is None:
119
self._smtp_password = auth.get_password(
120
'smtp', self._smtp_server, self._smtp_username)
122
# smtplib requires that the username and password be byte
123
# strings. The CRAM-MD5 spec doesn't give any guidance on
124
# encodings, but the SASL PLAIN spec says UTF-8, so that's
126
username = osutils.safe_utf8(self._smtp_username)
127
password = osutils.safe_utf8(self._smtp_password)
129
self._connection.login(username, password)
132
def get_message_addresses(message):
133
"""Get the origin and destination addresses of a message.
135
:param message: A message object supporting get() to access its
136
headers, like email.Message or bzrlib.email_message.EmailMessage.
137
:return: A pair (from_email, to_emails), where from_email is the email
138
address in the From header, and to_emails a list of all the
139
addresses in the To, Cc, and Bcc headers.
141
from_email = Utils.parseaddr(message.get('From', None))[1]
142
to_full_addresses = []
143
for header in ['To', 'Cc', 'Bcc']:
144
value = message.get(header, None)
146
to_full_addresses.append(value)
147
to_emails = [ pair[1] for pair in
148
Utils.getaddresses(to_full_addresses) ]
150
return from_email, to_emails
152
def send_email(self, message):
153
"""Send an email message.
155
The message will be sent to all addresses in the To, Cc and Bcc
158
:param message: An email.Message or email.MIMEMultipart object.
161
from_email, to_emails = self.get_message_addresses(message)
164
raise NoDestinationAddress
168
self._connection.sendmail(from_email, to_emails,
170
except smtplib.SMTPRecipientsRefused, e:
171
raise SMTPError('server refused recipient: %d %s' %
172
e.recipients.values()[0])
173
except smtplib.SMTPResponseException, e:
174
raise SMTPError('%d %s' % (e.smtp_code, e.smtp_error))
175
except smtplib.SMTPException, e:
176
raise SMTPError(str(e))