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# Copyright (C) 1998,1999,2000 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
"""Parse bounce messages generated by qmail.
Qmail actually has a standard, called QSBMF (qmail-send bounce message
format), as described in
http://cr.yp.to/proto/qsbmf.txt
This module should be conformant.
"""
import string
import re
introtag = 'Hi. This is the'
acre = re.compile(r'<(?P<addr>[^>]*)>:')
def process(msg):
msg.rewindbody()
# simple state machine
# 0 = nothing seen yet
# 1 = intro paragraph seen
# 2 = recip paragraphs seen
state = 0
addrs = []
while 1:
line = msg.fp.readline()
if not line:
break
line = string.strip(line)
if state == 0 and line[:len(introtag)] == introtag:
state = 1
elif state == 1 and not line:
state = 2
elif state == 2:
if line and line[0] == '-':
# we're looking at the break paragraph, so we're done
break
# At this point we know we must be looking at a recipient
# paragraph
mo = acre.match(line)
if mo:
addrs.append(mo.group('addr'))
# otherwise, it must be a continuation line, so just ignore it
# not looking at anything in particular
#
# we've parse everything we need to
return addrs or None
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