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+
+# Copyright (c) 2011, 2012 Free Software Foundation
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+# Copyright (c) 2011, 2012 Free Software Foundation
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+# This project incorporates work covered by the following copyright and permission notice:
+
+# Copyright (c) 2009, Julien Fache
+# All rights reserved.
+
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+# * Neither the name of the author nor the names of other
+# contributors may be used to endorse or promote products derived
+# from this software without specific prior written permission.
+
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+# OF THE POSSIBILITY OF SUCH DAMAGE.
+"""Akismet spam checker backend for Objectapp"""
+from django.conf import settings
+from django.utils.encoding import smart_str
+from django.contrib.sites.models import Site
+from django.core.exceptions import ImproperlyConfigured
+
+from objectapp.settings import PROTOCOL
+
+try:
+ from akismet import Akismet
+ from akismet import APIKeyError
+except ImportError:
+ raise ImproperlyConfigured('akismet module is not available')
+
+if not getattr(settings, 'AKISMET_SECRET_API_KEY', ''):
+ raise ImproperlyConfigured('You have to set AKISMET_SECRET_API_KEY')
+
+AKISMET_API_KEY = settings.AKISMET_SECRET_API_KEY
+
+
+def backend(comment, content_object, request):
+ """Akismet spam checker backend for Objectapp"""
+ blog_url = '%s://%s/' % (PROTOCOL, Site.objects.get_current().domain)
+
+ akismet = Akismet(key=AKISMET_API_KEY, blog_url=blog_url)
+
+ if not akismet.verify_key():
+ raise APIKeyError('Your Akismet API key is invalid.')
+
+ akismet_data = {
+ 'user_ip': request.META.get('REMOTE_ADDR', ''),
+ 'user_agent': request.META.get('HTTP_USER_AGENT', ''),
+ 'referrer': request.META.get('HTTP_REFERER', 'unknown'),
+ 'permalink': content_object.get_absolute_url(),
+ 'comment_type': 'comment',
+ 'comment_author': smart_str(comment.userinfo.get('name', '')),
+ 'comment_author_email': smart_str(comment.userinfo.get('email', '')),
+ 'comment_author_url': smart_str(comment.userinfo.get('url', '')),
+ }
+ is_spam = akismet.comment_check(smart_str(comment.comment),
+ data=akismet_data, build_data=True)
+ return is_spam