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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.
"""Inject the message to Usenet."""
import sys
import os
import string
import re
import socket
from Mailman.Logging.Syslog import syslog
from Mailman.pythonlib.StringIO import StringIO
def process(mlist, msg, msgdata):
# short circuits
if not mlist.gateway_to_news or \
msgdata.get('isdigest') or \
msgdata.get('fromusenet'):
return
# sanity checks
error = []
if not mlist.linked_newsgroup:
error.append('no newsgroup')
if not mlist.nntp_host:
error.append('no NNTP host')
if error:
syslog('NNTP gateway improperly configured: ' +
string.join(error, ', '))
return
# Fork in case the nntp connection hangs.
pid = os.fork()
if pid:
# In the parent. This is a bit of a kludge to keep a list of the
# children that need to be waited on. We want to be sure to do the
# waiting while the list is unlocked!
kids = msgdata.get('kids', {})
kids[pid] = pid
msgdata['kids'] = kids
else:
do_child(mlist, msg)
def do_child(mlist, msg):
# The version we have is from Python 1.5.2+ and fixes the "mode reader"
# problem.
from Mailman.pythonlib import nntplib
# Ok, munge headers, etc.
subj = msg.getheader('subject')
subjpref = mlist.subject_prefix
if subj:
if not re.match('(re:? *)?' + re.escape(subjpref), subj, re.I):
msg['Subject'] = subjpref + subj
else:
msg['Subject'] = subjpref + '(no subject)'
if mlist.reply_goes_to_list:
del msg['reply-to']
msg.headers.append('Reply-To: %s\n' % mlist.GetListEmail())
# if we already have a sender header, don't add another one; use
# the header that's already there.
if not msg.getheader('sender'):
msg.headers.append('Sender: %s\n' % mlist.GetAdminEmail())
msg.headers.append('Errors-To: %s\n' % mlist.GetAdminEmail())
msg.headers.append('X-BeenThere: %s\n' % mlist.GetListEmail())
ngheader = msg.getheader('newsgroups')
if ngheader is not None:
# see if the Newsgroups: header already contains our
# linked_newsgroup. If so, don't add it again. If not,
# append our linked_newsgroup to the end of the header list
ngroups = map(string.strip, string.split(ngheader, ','))
if mlist.linked_newsgroup not in ngroups:
ngroups.append(mlist.linked_newsgroup)
ngheader = string.join(ngroups, ',')
# subtitute our new header for the old one. XXX Message
# class should have a __setitem__()
del msg['newsgroups']
msg.headers.append('Newsgroups: %s\n' % ngroups)
else:
# Newsgroups: isn't in the message
msg.headers.append('Newsgroups: %s\n' % mlist.linked_newsgroup)
# Note: Need to be sure 2 messages aren't ever sent to the same
# list in the same process, since message ID's need to be unique.
# Could make the ID be mm.listname.postnum instead if that happens
if msg.getheader('Message-ID') is None:
msg.headers.append('Message-ID: <mm.%s.%s@%s>\n' %
(time.time(), os.getpid(), mlist.host_name))
if msg.getheader('Lines') is None:
msg.headers.append('Lines: %s\n' %
len(string.split(msg.body,"\n")))
del msg['received']
# TBD: Gross hack to ensure that we have only one
# content-transfer-encoding header. More than one barfs NNTP. I
# don't know why we sometimes have more than one such header, and it
# probably isn't correct to take the value of just the first one.
# What if there are conflicting headers???
#
# This relies on the new interface for getaddrlist() returning values
# for all present headers, and the fact that the legal values are
# usually not parseable as addresses. Yes this is another bogosity.
cteheaders = msg.getaddrlist('content-transfer-encoding')
if cteheaders:
ctetuple = cteheaders[0]
ctevalue = ctetuple[1]
del msg['content-transfer-encoding']
msg['content-transfer-encoding'] = ctevalue
# NNTP is strict about spaces after the colon in headers.
for n in range(len(msg.headers)):
line = msg.headers[n]
i = string.find(line,":")
if i <> -1 and line[i+1] <> ' ':
msg.headers[n] = line[:i+1] + ' ' + line[i+1:]
# flatten the message object, stick it in a StringIO object and post
# that resulting thing to the newsgroup
fp = StringIO(str(msg))
conn = None
try:
try:
conn = nntplib.NNTP(mlist.nntp_host, readermode=1)
conn.post(fp)
except nntplib.error_temp, e:
syslog('error', '(ToUsenet) NNTP error for list "%s": %s' %
(mlist.internal_name(), e))
except socket.error, e:
syslog('error', '(ToUsenet) socket error for list "%s": %s'
% (mlist.internal_name(), e))
finally:
if conn:
conn.quit()
os._exit(0)
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