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# -*- coding: utf-8 -*-
#
# Copyright (C) 2006 Edgewall Software
# All rights reserved.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at http://trac.edgewall.com/license.html.
#
# This software consists of voluntary contributions made by many
# individuals. For the exact contribution history, see the revision
# history and logs, available at http://projects.edgewall.com/trac/.
from datetime import datetime, timedelta
from trac.config import IntOption
from trac.core import *
from tracspamfilter.api import IFilterStrategy
from tracspamfilter.model import LogEntry
class IPThrottleFilterStrategy(Component):
"""Spam filter strategy that throttles multiple subsequent submissions from
the same IP address.
"""
implements(IFilterStrategy)
karma_points = IntOption('spam-filter', 'ip_throttle_karma', '3',
"""By how many points exceeding the configured maximum number of posts
per hour impacts the overall score.""")
max_posts = IntOption('spam-filter', 'max_posts_by_ip', '10',
"""The maximum allowed number of submissions per hour form a single IP
address. If this limit is exceeded, subsequent permissions get negative
karma.""")
# IFilterStrategy implementation
def test(self, req, author, content):
threshold = datetime.now() - timedelta(hours=1)
num_posts = 0
for entry in LogEntry.select(self.env, ipnr=req.remote_addr):
if datetime.fromtimestamp(entry.time) < threshold:
break
num_posts += 1
if num_posts > self.max_posts:
return -abs(self.karma_points) * num_posts / self.max_posts, \
'Maximum number of posts per hour for this IP exceeded'
def train(self, req, author, content, spam=True):
pass
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