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 email.utils import getaddresses, parseaddr
35
smtp_password = config.Option('smtp_password', default=None,
37
Password to use for authentication to SMTP server.
39
smtp_server = config.Option('smtp_server', default=None,
41
Hostname of the SMTP server to use for sending email.
43
smtp_username = config.Option('smtp_username', default=None,
45
Username to use for authentication to SMTP server.
49
class SMTPError(BzrError):
51
_fmt = "SMTP error: %(error)s"
53
def __init__(self, error):
57
class SMTPConnectionRefused(SMTPError):
59
_fmt = "SMTP connection to %(host)s refused"
61
def __init__(self, error, host):
66
class DefaultSMTPConnectionRefused(SMTPConnectionRefused):
68
_fmt = "Please specify smtp_server. No server at default %(host)s."
71
class NoDestinationAddress(InternalBzrError):
73
_fmt = "Message does not have a destination address."
76
class SMTPConnection(object):
77
"""Connect to an SMTP server and send an email.
79
This is a gateway between breezy.config.Config and smtplib.SMTP. It
80
understands the basic bzr SMTP configuration information: smtp_server,
81
smtp_username, and smtp_password.
84
_default_smtp_server = 'localhost'
86
def __init__(self, config, _smtp_factory=None):
87
self._smtp_factory = _smtp_factory
88
if self._smtp_factory is None:
89
self._smtp_factory = smtplib.SMTP
91
self._config_smtp_server = config.get('smtp_server')
92
self._smtp_server = self._config_smtp_server
93
if self._smtp_server is None:
94
self._smtp_server = self._default_smtp_server
96
self._smtp_username = config.get('smtp_username')
97
self._smtp_password = config.get('smtp_password')
99
self._connection = None
102
"""If we haven't connected, connect and authenticate."""
103
if self._connection is not None:
106
self._create_connection()
107
# FIXME: _authenticate() should only be called when the server has
108
# refused unauthenticated access, so it can safely try to authenticate
109
# with the default username. JRV20090407
112
def _create_connection(self):
113
"""Create an SMTP connection."""
114
self._connection = self._smtp_factory()
116
self._connection.connect(self._smtp_server)
117
except socket.error as e:
118
if e.args[0] == errno.ECONNREFUSED:
119
if self._config_smtp_server is None:
120
raise DefaultSMTPConnectionRefused(socket.error,
123
raise SMTPConnectionRefused(socket.error,
128
# Say EHLO (falling back to HELO) to query the server's features.
129
code, resp = self._connection.ehlo()
130
if not (200 <= code <= 299):
131
code, resp = self._connection.helo()
132
if not (200 <= code <= 299):
133
raise SMTPError("server refused HELO: %d %s" % (code, resp))
135
# Use TLS if the server advertised it:
136
if self._connection.has_extn("starttls"):
137
code, resp = self._connection.starttls()
138
if not (200 <= code <= 299):
139
raise SMTPError("server refused STARTTLS: %d %s" %
141
# Say EHLO again, to check for newly revealed features
142
code, resp = self._connection.ehlo()
143
if not (200 <= code <= 299):
144
raise SMTPError("server refused EHLO: %d %s" % (code, resp))
146
def _authenticate(self):
147
"""If necessary authenticate yourself to the server."""
148
auth = config.AuthenticationConfig()
149
if self._smtp_username is None:
150
# FIXME: Since _authenticate gets called even when no authentication
151
# is necessary, it's not possible to use the default username
153
self._smtp_username = auth.get_user('smtp', self._smtp_server)
154
if self._smtp_username is None:
157
if self._smtp_password is None:
158
self._smtp_password = auth.get_password(
159
'smtp', self._smtp_server, self._smtp_username)
161
# smtplib requires that the username and password be byte
162
# strings. The CRAM-MD5 spec doesn't give any guidance on
163
# encodings, but the SASL PLAIN spec says UTF-8, so that's
165
username = osutils.safe_utf8(self._smtp_username)
166
password = osutils.safe_utf8(self._smtp_password)
168
self._connection.login(username, password)
171
def get_message_addresses(message):
172
"""Get the origin and destination addresses of a message.
174
:param message: A message object supporting get() to access its
175
headers, like email.message.Message or
176
breezy.email_message.EmailMessage.
177
:return: A pair (from_email, to_emails), where from_email is the email
178
address in the From header, and to_emails a list of all the
179
addresses in the To, Cc, and Bcc headers.
181
from_email = parseaddr(message.get('From', None))[1]
182
to_full_addresses = []
183
for header in ['To', 'Cc', 'Bcc']:
184
value = message.get(header, None)
186
to_full_addresses.append(value)
187
to_emails = [pair[1] for pair in
188
getaddresses(to_full_addresses)]
190
return from_email, to_emails
192
def send_email(self, message):
193
"""Send an email message.
195
The message will be sent to all addresses in the To, Cc and Bcc
198
:param message: An email.message.Message or
199
email.mime.multipart.MIMEMultipart object.
202
from_email, to_emails = self.get_message_addresses(message)
205
raise NoDestinationAddress
209
self._connection.sendmail(from_email, to_emails,
211
except smtplib.SMTPRecipientsRefused as e:
212
raise SMTPError('server refused recipient: %d %s' %
213
next(iter(e.recipients.values())))
214
except smtplib.SMTPResponseException as e:
215
raise SMTPError('%d %s' % (e.smtp_code, e.smtp_error))
216
except smtplib.SMTPException as e:
217
raise SMTPError(str(e))