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# Copyright (C) 2001-2015 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.
"""Posting moderation filter.
"""
import re
from email.MIMEMessage import MIMEMessage
from email.MIMEText import MIMEText
from email.Utils import parseaddr
from Mailman import mm_cfg
from Mailman import Utils
from Mailman import Message
from Mailman import Errors
from Mailman.i18n import _
from Mailman.Handlers import Hold
from Mailman.Logging.Syslog import syslog
from Mailman.MailList import MailList
class ModeratedMemberPost(Hold.ModeratedPost):
# BAW: I wanted to use the reason below to differentiate between this
# situation and normal ModeratedPost reasons. Greg Ward and Stonewall
# Ballard thought the language was too harsh and mentioned offense taken
# by some list members. I'd still like this class's reason to be
# different than the base class's reason, but we'll use this until someone
# can come up with something more clever but inoffensive.
#
# reason = _('Posts by member are currently quarantined for moderation')
pass
def process(mlist, msg, msgdata):
if msgdata.get('approved'):
return
# Is the poster a member or not?
for sender in msg.get_senders():
if mlist.isMember(sender):
break
else:
sender = None
if sender:
# If the member's moderation flag is on, then perform the moderation
# action.
if mlist.getMemberOption(sender, mm_cfg.Moderate):
# Note that for member_moderation_action, 0==Hold, 1=Reject,
# 2==Discard
if mlist.member_moderation_action == 0:
# Hold. BAW: WIBNI we could add the member_moderation_notice
# to the notice sent back to the sender?
msgdata['sender'] = sender
Hold.hold_for_approval(mlist, msg, msgdata,
ModeratedMemberPost)
elif mlist.member_moderation_action == 1:
# Reject
text = mlist.member_moderation_notice
if text:
text = Utils.wrap(text)
else:
# Use the default RejectMessage notice string
text = None
raise Errors.RejectMessage, text
elif mlist.member_moderation_action == 2:
# Discard. BAW: Again, it would be nice if we could send a
# discard notice to the sender
raise Errors.DiscardMessage
else:
assert 0, 'bad member_moderation_action'
# Should we do anything explict to mark this message as getting past
# this point? No, because further pipeline handlers will need to do
# their own thing.
return
else:
sender = msg.get_sender()
# From here on out, we're dealing with non-members.
listname = mlist.internal_name()
if matches_p(sender, mlist.accept_these_nonmembers, listname):
return
if matches_p(sender, mlist.hold_these_nonmembers, listname):
Hold.hold_for_approval(mlist, msg, msgdata, Hold.NonMemberPost)
# No return
if matches_p(sender, mlist.reject_these_nonmembers, listname):
do_reject(mlist)
# No return
if matches_p(sender, mlist.discard_these_nonmembers, listname):
do_discard(mlist, msg)
# No return
# Okay, so the sender wasn't specified explicitly by any of the non-member
# moderation configuration variables. Handle by way of generic non-member
# action.
assert 0 <= mlist.generic_nonmember_action <= 4
if mlist.generic_nonmember_action == 0 or msgdata.get('fromusenet'):
# Accept
return
elif mlist.generic_nonmember_action == 1:
Hold.hold_for_approval(mlist, msg, msgdata, Hold.NonMemberPost)
elif mlist.generic_nonmember_action == 2:
do_reject(mlist)
elif mlist.generic_nonmember_action == 3:
do_discard(mlist, msg)
def matches_p(sender, nonmembers, listname):
# First strip out all the regular expressions and listnames
plainaddrs = [addr for addr in nonmembers if not (addr.startswith('^')
or addr.startswith('@'))]
addrdict = Utils.List2Dict(plainaddrs, foldcase=1)
if addrdict.has_key(sender):
return 1
# Now do the regular expression matches
for are in nonmembers:
if are.startswith('^'):
try:
cre = re.compile(are, re.IGNORECASE)
except re.error:
continue
if cre.search(sender):
return 1
elif are.startswith('@'):
# XXX Needs to be reviewed for list@domain names.
try:
mname = are[1:].lower().strip()
if mname == listname:
# don't reference your own list
syslog('error',
'*_these_nonmembers in %s references own list',
listname)
else:
mother = MailList(mname, lock=0)
if mother.isMember(sender):
return 1
except Errors.MMUnknownListError:
syslog('error',
'*_these_nonmembers in %s references non-existent list %s',
listname, mname)
return 0
def do_reject(mlist):
listowner = mlist.GetOwnerEmail()
if mlist.nonmember_rejection_notice:
raise Errors.RejectMessage, \
Utils.wrap(_(mlist.nonmember_rejection_notice))
else:
raise Errors.RejectMessage, Utils.wrap(_("""\
Your message has been rejected, probably because you are not subscribed to the
mailing list and the list's policy is to prohibit non-members from posting to
it. If you think that your messages are being rejected in error, contact the
mailing list owner at %(listowner)s."""))
def do_discard(mlist, msg):
sender = msg.get_sender()
# Do we forward auto-discards to the list owners?
if mlist.forward_auto_discards:
lang = mlist.preferred_language
varhelp = '%s/?VARHELP=privacy/sender/discard_these_nonmembers' % \
mlist.GetScriptURL('admin', absolute=1)
nmsg = Message.UserNotification(mlist.GetOwnerEmail(),
mlist.GetBouncesEmail(),
_('Auto-discard notification'),
lang=lang)
nmsg.set_type('multipart/mixed')
text = MIMEText(Utils.wrap(_(
'The attached message has been automatically discarded.')),
_charset=Utils.GetCharSet(lang))
nmsg.attach(text)
nmsg.attach(MIMEMessage(msg))
nmsg.send(mlist)
# Discard this sucker
raise Errors.DiscardMessage
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