# Copyright (C) 2002 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. """Maildir pre-queue runner. Most MTAs can be configured to deliver messages to a `Maildir'[1]. This runner will read messages from a maildir's new/ directory and inject them into Mailman's qfiles/in directory for processing in the normal pipeline. This delivery mechanism contrasts with mail program delivery, where incoming messages end up in qfiles/in via the MTA executing the scripts/post script (and likewise for the other -aliases for each mailing list). The advantage to Maildir delivery is that it is more efficient; there's no need to fork an intervening program just to take the message from the MTA's standard output, to the qfiles/in directory. [1] http://cr.yp.to/proto/maildir.html We're going to use the :info flag == 1, experimental status flag for our own purposes. The :1 can be followed by one of these letters: - P means that MaildirRunner's in the process of parsing and enqueuing the message. If successful, it will delete the file. - X means something failed during the parse/enqueue phase. An error message will be logged to log/error and the file will be renamed :1,X. MaildirRunner will never automatically return to this file, but once the problem is fixed, you can manually move the file back to the new/ directory and MaildirRunner will attempt to re-process it. At some point we may do this automatically. See the variable USE_MAILDIR in Defaults.py.in for enabling this delivery mechanism. """ # NOTE: Maildir delivery is experimental in Mailman 2.1. import os import re import errno from email.Parser import Parser from email.Utils import parseaddr from Mailman import mm_cfg from Mailman import Utils from Mailman.Message import Message from Mailman.Queue.Runner import Runner from Mailman.Queue.sbcache import get_switchboard from Mailman.Logging.Syslog import syslog # We only care about the listname and the subq as in listname@ or # listname-request@ lre = re.compile(r""" ^ # start of string (?P[^-@]+) # listname@ or listname-subq@ (?: # non-grouping - # dash separator (?P[^-+@]+) # everything up to + or - or @ )? # if it exists """, re.VERBOSE | re.IGNORECASE) class MaildirRunner(Runner): # This class is much different than most runners because it pulls files # of a different format than what scripts/post and friends leaves. The # files this runner reads are just single message files as dropped into # the directory by the MTA. This runner will read the file, and enqueue # it in the expected qfiles directory for normal processing. def __init__(self, slice=None, numslices=1): # Don't call the base class constructor, but build enough of the # underlying attributes to use the base class's implementation. self._stop = 0 self._dir = os.path.join(mm_cfg.MAILDIR_DIR, 'new') self._cur = os.path.join(mm_cfg.MAILDIR_DIR, 'cur') self._parser = Parser(Message) def _oneloop(self): # Refresh this each time through the list. BAW: could be too # expensive. listnames = Utils.list_names() # Cruise through all the files currently in the new/ directory try: files = os.listdir(self._dir) except OSError, e: if e.errno <> errno.ENOENT: raise # Nothing's been delivered yet return 0 for file in files: srcname = os.path.join(self._dir, file) dstname = os.path.join(self._cur, file + ':1,P') xdstname = os.path.join(self._cur, file + ':1,X') try: os.rename(srcname, dstname) except OSError, e: if e.errno == errno.ENOENT: # Some other MaildirRunner beat us to it continue syslog('error', 'Could not rename maildir file: %s', srcname) raise # Now open, read, parse, and enqueue this message try: fp = open(dstname) try: msg = self._parser.parse(fp) finally: fp.close() # Now we need to figure out which queue of which list this # message was destined for. See verp_bounce() in # BounceRunner.py for why we do things this way. vals = [] for header in ('delivered-to', 'envelope-to', 'apparently-to'): vals.extend(msg.get_all(header, [])) for field in vals: to = parseaddr(field)[1] if not to: continue mo = lre.match(to) if not mo: # This isn't an address we care about continue listname, subq = mo.group('listname', 'subq') if listname in listnames: break else: # As far as we can tell, this message isn't destined for # any list on the system. What to do? syslog('error', 'Message apparently not for any list: %s', xdstname) os.rename(dstname, xdstname) continue # BAW: blech, hardcoded msgdata = {'listname': listname} # -admin is deprecated if subq in ('bounces', 'admin'): queue = get_switchboard(mm_cfg.BOUNCEQUEUE_DIR) elif subq == 'confirm': msgdata['toconfirm'] = 1 queue = get_switchboard(mm_cfg.CMDQUEUE_DIR) elif subq in ('join', 'subscribe'): msgdata['tojoin'] = 1 queue = get_switchboard(mm_cfg.CMDQUEUE_DIR) elif subq in ('leave', 'unsubscribe'): msgdata['toleave'] = 1 queue = get_switchboard(mm_cfg.CMDQUEUE_DIR) elif subq == 'owner': msgdata.update({ 'toowner': 1, 'envsender': Utils.get_site_email(extra='bounces'), 'pipeline': mm_cfg.OWNER_PIPELINE, }) queue = get_switchboard(mm_cfg.INQUEUE_DIR) elif subq is None: msgdata['tolist'] = 1 queue = get_switchboard(mm_cfg.INQUEUE_DIR) elif subq == 'request': msgdata['torequest'] = 1 queue = get_switchboard(mm_cfg.CMDQUEUE_DIR) else: syslog('error', 'Unknown sub-queue: %s', subq) os.rename(dstname, xdstname) continue queue.enqueue(msg, msgdata) os.unlink(dstname) except Exception, e: os.rename(dstname, xdstname) syslog('error', str(e)) def _cleanup(self): pass