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# Copyright (C) 2013-2018 by the Free Software Foundation, Inc.
#
# 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.
"""Wrap the message in an outer message/rfc822 part and transfer/add
some headers from the original.
Also, in the case of Munge From, replace the From:, Reply-To: and Cc: in the
original message.
"""
import copy
from email.MIMEMessage import MIMEMessage
from email.MIMEText import MIMEText
from Mailman import Utils
# Headers from the original that we want to keep in the wrapper.
KEEPERS = ('to',
'in-reply-to',
'references',
'x-mailman-approved-at',
'date',
)
def process(mlist, msg, msgdata):
# This is the negation of we're wrapping because dmarc_moderation_action
# is wrap this message or from_is_list applies and is wrap.
if not (msgdata.get('from_is_list') == 2 or
(mlist.from_is_list == 2 and msgdata.get('from_is_list') == 0)):
# Now see if we need to add a From:, Reply-To: or Cc: without wrapping.
# See comments in CookHeaders.change_header for why we do this here.
a_h = msgdata.get('add_header')
if a_h:
if a_h.get('From'):
del msg['from']
msg['From'] = a_h.get('From')
if a_h.get('Reply-To'):
del msg['reply-to']
msg['Reply-To'] = a_h.get('Reply-To')
if a_h.get('Cc'):
del msg['cc']
msg['Cc'] = a_h.get('Cc')
return
# There are various headers in msg that we don't want, so we basically
# make a copy of the msg, then delete almost everything and set/copy
# what we want.
omsg = copy.deepcopy(msg)
# If CookHeaders didn't change the Subject: we need to keep it too.
# Get a fresh list.
keepers = list(KEEPERS)
if 'subject' not in [key.lower() for key in
msgdata.get('add_header', {}).keys()]:
keepers.append('subject')
for key in msg.keys():
if key.lower() not in keepers:
del msg[key]
msg['MIME-Version'] = '1.0'
msg['Message-ID'] = Utils.unique_message_id(mlist)
# Add the headers from CookHeaders.
for k, v in msgdata.get('add_header', {}).items():
msg[k] = v
# Are we including dmarc_wrapped_message_text? I.e., do we have text and
# are we wrapping because of dmarc_moderation_action?
if mlist.dmarc_wrapped_message_text and msgdata.get('from_is_list') == 2:
part1 = MIMEText(Utils.wrap(mlist.dmarc_wrapped_message_text),
'plain',
Utils.GetCharSet(mlist.preferred_language))
part1['Content-Disposition'] = 'inline'
part2 = MIMEMessage(omsg)
part2['Content-Disposition'] = 'inline'
msg['Content-Type'] = 'multipart/mixed'
msg.set_payload([part1, part2])
else:
msg['Content-Type'] = 'message/rfc822'
msg['Content-Disposition'] = 'inline'
msg.set_payload([omsg])
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