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# Copyright (C) 2007-2009 by the Free Software Foundation, Inc.
#
# This file is part of GNU Mailman.
#
# GNU Mailman 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 3 of the License, or (at your option)
# any later version.
#
# GNU Mailman 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
# GNU Mailman. If not, see <http://www.gnu.org/licenses/>.
"""Application level auto-reply code."""
# XXX This should undergo a rewrite to move this functionality off of the
# mailing list. The reply governor should really apply site-wide per
# recipient (I think).
from __future__ import unicode_literals
__metaclass__ = type
__all__ = [
'autorespond_to_sender',
'can_acknowledge',
]
import logging
import datetime
from mailman import Utils
from mailman import i18n
from mailman.config import config
log = logging.getLogger('mailman.vette')
_ = i18n._
def autorespond_to_sender(mlist, sender, lang=None):
"""Return True if Mailman should auto-respond to this sender.
This is only consulted for messages sent to the -request address, or
for posting hold notifications, and serves only as a safety value for
mail loops with email 'bots.
"""
if lang is None:
lang = mlist.preferred_language
max_autoresponses_per_day = int(config.mta.max_autoresponses_per_day)
if max_autoresponses_per_day == 0:
# Unlimited.
return True
today = datetime.date.today()
info = mlist.hold_and_cmd_autoresponses.get(sender)
if info is None or info[0] <> today:
# This is the first time we've seen a -request/post-hold for this
# sender today.
mlist.hold_and_cmd_autoresponses[sender] = (today, 1)
return True
date, count = info
if count < 0:
# They've already hit the limit for today, and we've already notified
# them of this fact, so there's nothing more to do.
log.info('-request/hold autoresponse discarded for: %s', sender)
return False
if count >= max_autoresponses_per_day:
log.info('-request/hold autoresponse limit hit for: %s', sender)
mlist.hold_and_cmd_autoresponses[sender] = (today, -1)
# Send this notification message instead.
text = Utils.maketext(
'nomoretoday.txt',
{'sender' : sender,
'listname': mlist.fqdn_listname,
'num' : count,
'owneremail': mlist.owner_address,
},
lang=lang)
with i18n.using_language(lang):
msg = Message.UserNotification(
sender, mlist.owner_address,
_('Last autoresponse notification for today'),
text, lang=lang)
msg.send(mlist)
return False
mlist.hold_and_cmd_autoresponses[sender] = (today, count + 1)
return True
def can_acknowledge(msg):
"""A boolean specifying whether this message can be acknowledged.
There are several reasons why a message should not be acknowledged, mostly
related to competing standards or common practices. These include:
* The message has a X-No-Ack header with any value
* The message has an X-Ack header with a 'no' value
* The message has a Precedence header
* The message has an Auto-Submitted header and that header does not have a
value of 'no'
* The message has an empty Return-Path header, e.g. <>
* The message has any RFC 2369 headers (i.e. List-* headers)
:param msg: a Message object.
:return: Boolean specifying whether the message can be acknowledged or not
(which is different from whether it will be acknowledged).
"""
# I wrote it this way for clarity and consistency with the docstring.
for header in msg.keys():
if header in ('x-no-ack', 'precedence'):
return False
if header.lower().startswith('list-'):
return False
if msg.get('x-ack', '').lower() == 'no':
return False
if msg.get('auto-submitted', 'no').lower() <> 'no':
return False
if msg.get('return-path') == '<>':
return False
return True
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