/usr/lib/python2.7/dist-packages/bzrlib/email_message.py is in python-bzrlib 2.7.0-2ubuntu3.1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 | # Copyright (C) 2007 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""A convenience class around email.Message and email.MIMEMultipart."""
from __future__ import absolute_import
from email import (
Header,
Message,
MIMEMultipart,
MIMEText,
Utils,
)
from bzrlib import __version__ as _bzrlib_version
from bzrlib.osutils import safe_unicode
from bzrlib.smtp_connection import SMTPConnection
class EmailMessage(object):
"""An email message.
The constructor needs an origin address, a destination address or addresses
and a subject, and accepts a body as well. Add additional parts to the
message with add_inline_attachment(). Retrieve the entire formatted message
with as_string().
Headers can be accessed with get() and msg[], and modified with msg[] =.
"""
def __init__(self, from_address, to_address, subject, body=None):
"""Create an email message.
:param from_address: The origin address, to be put on the From header.
:param to_address: The destination address of the message, to be put in
the To header. Can also be a list of addresses.
:param subject: The subject of the message.
:param body: If given, the body of the message.
All four parameters can be unicode strings or byte strings, but for the
addresses and subject byte strings must be encoded in UTF-8. For the
body any byte string will be accepted; if it's not ASCII or UTF-8,
it'll be sent with charset=8-bit.
"""
self._headers = {}
self._body = body
self._parts = []
if isinstance(to_address, basestring):
to_address = [ to_address ]
to_addresses = []
for addr in to_address:
to_addresses.append(self.address_to_encoded_header(addr))
self._headers['To'] = ', '.join(to_addresses)
self._headers['From'] = self.address_to_encoded_header(from_address)
self._headers['Subject'] = Header.Header(safe_unicode(subject))
self._headers['User-Agent'] = 'Bazaar (%s)' % _bzrlib_version
def add_inline_attachment(self, body, filename=None, mime_subtype='plain'):
"""Add an inline attachment to the message.
:param body: A text to attach. Can be an unicode string or a byte
string, and it'll be sent as ascii, utf-8, or 8-bit, in that
preferred order.
:param filename: The name for the attachment. This will give a default
name for email programs to save the attachment.
:param mime_subtype: MIME subtype of the attachment (eg. 'plain' for
text/plain [default]).
The attachment body will be displayed inline, so do not use this
function to attach binary attachments.
"""
# add_inline_attachment() has been called, so the message will be a
# MIMEMultipart; add the provided body, if any, as the first attachment
if self._body is not None:
self._parts.append((self._body, None, 'plain'))
self._body = None
self._parts.append((body, filename, mime_subtype))
def as_string(self, boundary=None):
"""Return the entire formatted message as a string.
:param boundary: The boundary to use between MIME parts, if applicable.
Used for tests.
"""
if not self._parts:
msgobj = Message.Message()
if self._body is not None:
body, encoding = self.string_with_encoding(self._body)
msgobj.set_payload(body, encoding)
else:
msgobj = MIMEMultipart.MIMEMultipart()
if boundary is not None:
msgobj.set_boundary(boundary)
for body, filename, mime_subtype in self._parts:
body, encoding = self.string_with_encoding(body)
payload = MIMEText.MIMEText(body, mime_subtype, encoding)
if filename is not None:
content_type = payload['Content-Type']
content_type += '; name="%s"' % filename
payload.replace_header('Content-Type', content_type)
payload['Content-Disposition'] = 'inline'
msgobj.attach(payload)
# sort headers here to ease testing
for header, value in sorted(self._headers.items()):
msgobj[header] = value
return msgobj.as_string()
__str__ = as_string
def get(self, header, failobj=None):
"""Get a header from the message, returning failobj if not present."""
return self._headers.get(header, failobj)
def __getitem__(self, header):
"""Get a header from the message, returning None if not present.
This method intentionally does not raise KeyError to mimic the behavior
of __getitem__ in email.Message.
"""
return self._headers.get(header, None)
def __setitem__(self, header, value):
return self._headers.__setitem__(header, value)
@staticmethod
def send(config, from_address, to_address, subject, body, attachment=None,
attachment_filename=None, attachment_mime_subtype='plain'):
"""Create an email message and send it with SMTPConnection.
:param config: config object to pass to SMTPConnection constructor.
See EmailMessage.__init__() and EmailMessage.add_inline_attachment()
for an explanation of the rest of parameters.
"""
msg = EmailMessage(from_address, to_address, subject, body)
if attachment is not None:
msg.add_inline_attachment(attachment, attachment_filename,
attachment_mime_subtype)
SMTPConnection(config).send_email(msg)
@staticmethod
def address_to_encoded_header(address):
"""RFC2047-encode an address if necessary.
:param address: An unicode string, or UTF-8 byte string.
:return: A possibly RFC2047-encoded string.
"""
# Can't call Header over all the address, because that encodes both the
# name and the email address, which is not permitted by RFCs.
user, email = Utils.parseaddr(address)
if not user:
return email
else:
return Utils.formataddr((str(Header.Header(safe_unicode(user))),
email))
@staticmethod
def string_with_encoding(string_):
"""Return a str object together with an encoding.
:param string\\_: A str or unicode object.
:return: A tuple (str, encoding), where encoding is one of 'ascii',
'utf-8', or '8-bit', in that preferred order.
"""
# Python's email module base64-encodes the body whenever the charset is
# not explicitly set to ascii. Because of this, and because we want to
# avoid base64 when it's not necessary in order to be most compatible
# with the capabilities of the receiving side, we check with encode()
# and decode() whether the body is actually ascii-only.
if isinstance(string_, unicode):
try:
return (string_.encode('ascii'), 'ascii')
except UnicodeEncodeError:
return (string_.encode('utf-8'), 'utf-8')
else:
try:
string_.decode('ascii')
return (string_, 'ascii')
except UnicodeDecodeError:
try:
string_.decode('utf-8')
return (string_, 'utf-8')
except UnicodeDecodeError:
return (string_, '8-bit')
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