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# Copyright (C) 2000,2001 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.
"""NNTP queue runner."""
import os
import time
import re
import socket
import nntplib
from mimelib.MsgReader import MsgReader
from mimelib.address import getaddresses
COMMASPACE = ', '
from Mailman import mm_cfg
from Mailman.Queue.Runner import Runner
from Mailman.pythonlib.StringIO import StringIO
# Matches our Mailman crafted Message-IDs
mcre = re.compile(r'<mailman.\d+.\d+.(?P<listname>[^@]+)@(?P<hostname>[^>]+)>')
class NewsRunner(Runner):
def __init__(self, slice=None, numslices=1, cachelists=1):
Runner.__init__(self, mm_cfg.NEWSQUEUE_DIR,
slice, numslices, cachelists)
def _dispose(self, mlist, msg, msgdata):
if not msgdata.get('prepped'):
prepare_message(mlist, msg, msgdata)
try:
# Flatten the message object, sticking it in a StringIO object
fp = StringIO(str(msg))
conn = None
try:
try:
conn = nntplib.NNTP(mlist.nntp_host, readermode=1,
user=mm_cfg.NNTP_USERNAME,
password=mm_cfg.NNTP_PASSWORD)
conn.post(fp)
except nntplib.error_temp, e:
syslog('error',
'(NNTPDirect) NNTP error for list "%s": %s' %
(mlist.internal_name(), e))
except socket.error, e:
syslog('error',
'(NNTPDirect) socket error for list "%s": %s' %
(mlist.internal_name(), e))
finally:
if conn:
conn.quit()
except Exception, e:
# Some other exception occurred, which we definitely did not
# expect, so set this message up for requeuing.
self._log(e)
return 1
return 0
def prepare_message(mlist, msg, msgdata):
# Add the appropriate Newsgroups: header
ngheader = msg['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 = [s.strip() for s in ngheader.split(',')]
if mlist.linked_newsgroup not in ngroups:
ngroups.append(mlist.linked_newsgroup)
# Subtitute our new header for the old one.
del msg['newsgroups']
msg['Newsgroups'] = COMMA.join(ngroups)
else:
# Newsgroups: isn't in the message
msg['Newsgroups'] = mlist.linked_newsgroup
#
# Note: We need to be sure two messages aren't ever sent to the same list
# in the same process, since message ids need to be unique. Further, if
# messages are crossposted to two Usenet-gated mailing lists, they each
# need to have unique message ids or the nntpd will only accept one of
# them. The solution here is to substitute any existing message-id that
# isn't ours with one of ours, so we need to parse it to be sure we're not
# looping.
#
# Our Message-ID format is <mailman.secs.pid.listname@hostname>
msgid = msg['message-id']
hackmsgid = 1
if msgid:
mo = mcre.search(msgid)
if mo:
lname, hname = mo.group('listname', 'hostname')
if lname == mlist.internal_name() and hname == mlist.host_name:
hackmsgid = 0
if hackmsgid:
del msg['message-id']
msg['Message-ID'] = '<mailman.%d.%d.%s@%s>' % (
time.time(), os.getpid(), mlist.internal_name(), mlist.host_name)
#
# Lines: is useful
if msg['Lines'] is None:
# BAW: is there a better way?
reader = MsgReader(msg)
count = 0
while 1:
line = reader.readline()
if not line:
break
count += 1
msg['Lines'] = str(count)
#
# Get rid of these lines
del msg['received']
#
# BAW: 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 fact that the legal values are usually not parseable
# as addresses. Yes this is another bogosity.
cteheaders = getaddresses(msg.getall('content-transfer-encoding'))
if cteheaders:
ctetuple = cteheaders[0]
ctevalue = ctetuple[1]
del msg['content-transfer-encoding']
msg['content-transfer-encoding'] = ctevalue
# Mark this message as prepared in case it has to be requeued
msgdata['prepped'] = 1
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