# Copyright (C) 2001-2018 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.
"""Recognizes simple heuristically delimited warnings."""
import email
from Mailman.Bouncers.BouncerAPI import Stop
from Mailman.Bouncers.SimpleMatch import _c
# This is a list of tuples of the form
#
# (start cre, end cre, address cre)
#
# where `cre' means compiled regular expression, start is the line just before
# the bouncing address block, end is the line just after the bouncing address
# block, and address cre is the regexp that will recognize the addresses. It
# must have a group called `addr' which will contain exactly and only the
# address that bounced.
patterns = [
# pop3.pta.lia.net
(_c('The address to which the message has not yet been delivered is'),
_c('No action is required on your part'),
_c(r'\s*(?P<addr>\S+@\S+)\s*')),
# This is from MessageSwitch. It is a kludge because the text that
# identifies it as a warning only comes after the address. We can't
# use ecre, because it really isn't significant, so we fake it. Once
# we see the start, we know it's a warning, and we're going to return
# Stop anyway, so we match anything for the address and end.
(_c('This is just a warning, you do not need to take any action'),
_c('.+'),
_c('(?P<addr>.+)')),
# Symantec_AntiVirus_for_SMTP_Gateways - see comments for MessageSwitch
(_c('Delivery attempts will continue to be made'),
_c('.+'),
_c('(?P<addr>.+)')),
# Googlemail
(_c('THIS IS A WARNING MESSAGE ONLY'),
_c('Message will be retried'),
_c(r'\s*(?P<addr>\S+@\S+)\s*')),
# RS ver 1.0.95vs ? - see comments for MessageSwitch
(_c('We will continue to try to deliver'),
_c('.+'),
_c('(?P<addr>.+)')),
# kundenserver.de
(_c('not yet been delivered'),
_c('No action is required on your part'),
_c(r'\s*<?(?P<addr>\S+@[^>\s]+)>?\s*')),
# Next one goes here...
]
def process(msg):
# We used to just import process from SimpleMatch, but with the change in
# SimpleMatch to return only vaild addresses, that doesn't work any more.
# So, we copy most of the process from SimpleMatch here.
addrs = {}
for scre, ecre, acre in patterns:
state = 0
for line in email.Iterators.body_line_iterator(msg, decode=True):
if state == 0:
if scre.search(line):
state = 1
if state == 1:
mo = acre.search(line)
if mo:
addr = mo.group('addr')
if addr:
addrs[addr.strip('<>')] = 1
elif ecre.search(line):
break
if addrs:
# It's a recognized warning so stop now
return Stop
return []
