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
"""A convenience class around smtplib."""
19
from __future__ import absolute_import
21
from email.utils import getaddresses, parseaddr
37
smtp_password = config.Option('smtp_password', default=None,
39
Password to use for authentication to SMTP server.
41
smtp_server = config.Option('smtp_server', default=None,
43
Hostname of the SMTP server to use for sending email.
45
smtp_username = config.Option('smtp_username', default=None,
47
Username to use for authentication to SMTP server.
51
class SMTPError(BzrError):
53
_fmt = "SMTP error: %(error)s"
55
def __init__(self, error):
59
class SMTPConnectionRefused(SMTPError):
61
_fmt = "SMTP connection to %(host)s refused"
63
def __init__(self, error, host):
68
class DefaultSMTPConnectionRefused(SMTPConnectionRefused):
70
_fmt = "Please specify smtp_server. No server at default %(host)s."
73
class NoDestinationAddress(InternalBzrError):
75
_fmt = "Message does not have a destination address."
78
class SMTPConnection(object):
79
"""Connect to an SMTP server and send an email.
81
This is a gateway between breezy.config.Config and smtplib.SMTP. It
82
understands the basic bzr SMTP configuration information: smtp_server,
83
smtp_username, and smtp_password.
86
_default_smtp_server = 'localhost'
88
def __init__(self, config, _smtp_factory=None):
89
self._smtp_factory = _smtp_factory
90
if self._smtp_factory is None:
91
self._smtp_factory = smtplib.SMTP
93
self._config_smtp_server = config.get('smtp_server')
94
self._smtp_server = self._config_smtp_server
95
if self._smtp_server is None:
96
self._smtp_server = self._default_smtp_server
98
self._smtp_username = config.get('smtp_username')
99
self._smtp_password = config.get('smtp_password')
101
self._connection = None
104
"""If we haven't connected, connect and authenticate."""
105
if self._connection is not None:
108
self._create_connection()
109
# FIXME: _authenticate() should only be called when the server has
110
# refused unauthenticated access, so it can safely try to authenticate
111
# with the default username. JRV20090407
114
def _create_connection(self):
115
"""Create an SMTP connection."""
116
self._connection = self._smtp_factory()
118
self._connection.connect(self._smtp_server)
119
except socket.error as e:
120
if e.args[0] == errno.ECONNREFUSED:
121
if self._config_smtp_server is None:
122
raise DefaultSMTPConnectionRefused(socket.error,
125
raise SMTPConnectionRefused(socket.error,
130
# Say EHLO (falling back to HELO) to query the server's features.
131
code, resp = self._connection.ehlo()
132
if not (200 <= code <= 299):
133
code, resp = self._connection.helo()
134
if not (200 <= code <= 299):
135
raise SMTPError("server refused HELO: %d %s" % (code, resp))
137
# Use TLS if the server advertised it:
138
if self._connection.has_extn("starttls"):
139
code, resp = self._connection.starttls()
140
if not (200 <= code <= 299):
141
raise SMTPError("server refused STARTTLS: %d %s" %
143
# Say EHLO again, to check for newly revealed features
144
code, resp = self._connection.ehlo()
145
if not (200 <= code <= 299):
146
raise SMTPError("server refused EHLO: %d %s" % (code, resp))
148
def _authenticate(self):
149
"""If necessary authenticate yourself to the server."""
150
auth = config.AuthenticationConfig()
151
if self._smtp_username is None:
152
# FIXME: Since _authenticate gets called even when no authentication
153
# is necessary, it's not possible to use the default username
155
self._smtp_username = auth.get_user('smtp', self._smtp_server)
156
if self._smtp_username is None:
159
if self._smtp_password is None:
160
self._smtp_password = auth.get_password(
161
'smtp', self._smtp_server, self._smtp_username)
163
# smtplib requires that the username and password be byte
164
# strings. The CRAM-MD5 spec doesn't give any guidance on
165
# encodings, but the SASL PLAIN spec says UTF-8, so that's
167
username = osutils.safe_utf8(self._smtp_username)
168
password = osutils.safe_utf8(self._smtp_password)
170
self._connection.login(username, password)
173
def get_message_addresses(message):
174
"""Get the origin and destination addresses of a message.
176
:param message: A message object supporting get() to access its
177
headers, like email.message.Message or
178
breezy.email_message.EmailMessage.
179
:return: A pair (from_email, to_emails), where from_email is the email
180
address in the From header, and to_emails a list of all the
181
addresses in the To, Cc, and Bcc headers.
183
from_email = parseaddr(message.get('From', None))[1]
184
to_full_addresses = []
185
for header in ['To', 'Cc', 'Bcc']:
186
value = message.get(header, None)
188
to_full_addresses.append(value)
189
to_emails = [pair[1] for pair in
190
getaddresses(to_full_addresses)]
192
return from_email, to_emails
194
def send_email(self, message):
195
"""Send an email message.
197
The message will be sent to all addresses in the To, Cc and Bcc
200
:param message: An email.message.Message or
201
email.mime.multipart.MIMEMultipart object.
204
from_email, to_emails = self.get_message_addresses(message)
207
raise NoDestinationAddress
211
self._connection.sendmail(from_email, to_emails,
213
except smtplib.SMTPRecipientsRefused as e:
214
raise SMTPError('server refused recipient: %d %s' %
215
next(iter(e.recipients.values())))
216
except smtplib.SMTPResponseException as e:
217
raise SMTPError('%d %s' % (e.smtp_code, e.smtp_error))
218
except smtplib.SMTPException as e:
219
raise SMTPError(str(e))