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Resolves issue #62 - adds spam filtering via akismet.py using either

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Akismet or TypePad AntiSpam.

See the README for configuration instructions.
This commit is contained in:
Ross Poulton 2009-06-25 11:22:53 +00:00
parent 353407d251
commit 762f48a59e
6 changed files with 510 additions and 14 deletions
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41
LICENSE.3RDPARTY
View File

@ -3,6 +3,7 @@ distributed with Jutda Helpdesk.
1. License for jQuery & jQuery UI
2. License for jQuery UI 'Smoothness' theme
3. License for akismet.py
----------------------------------------------------------------------
@ -31,7 +32,7 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
----------------------------------------------------------------------
3. License for jQuery UI 'Smoothness' theme
2. License for jQuery UI 'Smoothness' theme
/*
* jQuery UI screen structure and presentation
@ -39,3 +40,41 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
* Author: Scott Jehl, scott@filamentgroup.com, http://www.filamentgroup.com
* Visit ThemeRoller.com
*/
----------------------------------------------------------------------
3. License for akismet.py
Copyright (c) 2003-2009, Michael Foord
All rights reserved.
E-mail : fuzzyman AT voidspace DOT org DOT uk
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 Michael Foord nor the name of Voidspace
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.

37
README
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@ -11,8 +11,9 @@ Jutda Helpdesk - A Django powered ticket tracker for small enterprise.
3. Upgrading from previous versions
4. Installation
5. Initial Configuration
6. API Usage
7. Thank You
6. Spam filtering
7. API Usage
8. Thank You
#########################
1. Licensing
@ -175,7 +176,35 @@ the current version of Jutda Helpdesk working.
You're now up and running!
#########################
6. API Usage
7. Spam filtering
#########################
Jutda Helpdesk includes a copy of `akismet.py' by Michael Foord, which lets
incoming ticket submissions be automatically checked against either the
Akismet or TypePad Anti-Spam services.
To enable this functionality, sign up for an API key with one of the following
serviceS:
Akismet: http://akismet.com/
Save your API key in settings.py as AKISMET_API_KEY
Note: Akismet is only free for personal use. Paid commercial accounts are
available.
TypePad AntiSpam: http://antispam.typepad.com/
Save your API key in settings.py as TYPEPAD_ANTISPAM_API_KEY
This service is free to use, within their terms and conditions.
If you have either of these settings enabled, the spam filtering will be
done automatically. If you have *both* settings configured, TypePad will
be used instead of Akismet.
Example configuration in settings.py:
TYPEPAD_ANTISPAM_API_KEY = 'abc123'
#########################
7. API Usage
#########################
Jutda Helpdesk includes an API accessible via HTTP POST requests, allowing
@ -185,7 +214,7 @@ For usage instructions and command syntax, see the file
templates/helpdesk/api_help.html, or visit http://helpdesk/api/help/.
#########################
7. Thank You
8. Thank You
#########################
While this started as a project to suit my own needs, since publishing the

372
akismet.py Normal file
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@ -0,0 +1,372 @@
# Version 0.2.0
# 2009/06/18
# Copyright Michael Foord 2005-2009
# akismet.py
# Python interface to the akismet API
# E-mail fuzzyman@voidspace.org.uk
# http://www.voidspace.org.uk/python/modules.shtml
# http://akismet.com
# Released subject to the BSD License
# See http://www.voidspace.org.uk/python/license.shtml
"""
A python interface to the `Akismet <http://akismet.com>`_ API.
This is a web service for blocking SPAM comments to blogs - or other online
services.
You will need a Wordpress API key, from `wordpress.com <http://wordpress.com>`_.
You should pass in the keyword argument 'agent' to the name of your program,
when you create an Akismet instance. This sets the ``user-agent`` to a useful
value.
The default is : ::
Python Interface by Fuzzyman | akismet.py/0.2.0
Whatever you pass in, will replace the *Python Interface by Fuzzyman* part.
**0.2.0** will change with the version of this interface.
Usage example::
from akismet import Akismet
api = Akismet(agent='Test Script')
# if apikey.txt is in place,
# the key will automatically be set
# or you can call api.setAPIKey()
#
if api.key is None:
print "No 'apikey.txt' file."
elif not api.verify_key():
print "The API key is invalid."
else:
# data should be a dictionary of values
# They can all be filled in with defaults
# from a CGI environment
if api.comment_check(comment, data):
print 'This comment is spam.'
else:
print 'This comment is ham.'
"""
import os, sys
from urllib import urlencode
import socket
if hasattr(socket, 'setdefaulttimeout'):
# Set the default timeout on sockets to 5 seconds
socket.setdefaulttimeout(5)
__version__ = '0.2.0'
__all__ = (
'__version__',
'Akismet',
'AkismetError',
'APIKeyError',
)
__author__ = 'Michael Foord <fuzzyman AT voidspace DOT org DOT uk>'
__docformat__ = "restructuredtext en"
user_agent = "%s | akismet.py/%s"
DEFAULTAGENT = 'Python Interface by Fuzzyman/%s'
isfile = os.path.isfile
urllib2 = None
try:
from google.appengine.api import urlfetch
except ImportError:
import urllib2
if urllib2 is None:
def _fetch_url(url, data, headers):
req = urlfetch.fetch(url=url, payload=data, method=urlfetch.POST, headers=headers)
if req.status_code == 200:
return req.content
raise Exception('Could not fetch Akismet URL: %s Response code: %s' %
(url, req.status_code))
else:
def _fetch_url(url, data, headers):
req = urllib2.Request(url, data, headers)
h = urllib2.urlopen(req)
resp = h.read()
return resp
class AkismetError(Exception):
"""Base class for all akismet exceptions."""
class APIKeyError(AkismetError):
"""Invalid API key."""
class Akismet(object):
"""A class for working with the akismet API"""
baseurl = 'rest.akismet.com/1.1/'
def __init__(self, key=None, blog_url=None, agent=None):
"""Automatically calls ``setAPIKey``."""
if agent is None:
agent = DEFAULTAGENT % __version__
self.user_agent = user_agent % (agent, __version__)
self.setAPIKey(key, blog_url)
def _getURL(self):
"""
Fetch the url to make requests to.
This comprises of api key plus the baseurl.
"""
return 'http://%s.%s' % (self.key, self.baseurl)
def _safeRequest(self, url, data, headers):
try:
resp = _fetch_url(url, data, headers)
except Exception, e:
raise AkismetError(str(e))
return resp
def setAPIKey(self, key=None, blog_url=None):
"""
Set the wordpress API key for all transactions.
If you don't specify an explicit API ``key`` and ``blog_url`` it will
attempt to load them from a file called ``apikey.txt`` in the current
directory.
This method is *usually* called automatically when you create a new
``Akismet`` instance.
"""
if key is None and isfile('apikey.txt'):
the_file = [l.strip() for l in open('apikey.txt').readlines()
if l.strip() and not l.strip().startswith('#')]
try:
self.key = the_file[0]
self.blog_url = the_file[1]
except IndexError:
raise APIKeyError("Your 'apikey.txt' is invalid.")
else:
self.key = key
self.blog_url = blog_url
def verify_key(self):
"""
This equates to the ``verify-key`` call against the akismet API.
It returns ``True`` if the key is valid.
The docs state that you *ought* to call this at the start of the
transaction.
It raises ``APIKeyError`` if you have not yet set an API key.
If the connection to akismet fails, it allows the normal ``HTTPError``
or ``URLError`` to be raised.
(*akismet.py* uses `urllib2 <http://docs.python.org/lib/module-urllib2.html>`_)
"""
if self.key is None:
raise APIKeyError("Your have not set an API key.")
data = { 'key': self.key, 'blog': self.blog_url }
# this function *doesn't* use the key as part of the URL
url = 'http://%sverify-key' % self.baseurl
# we *don't* trap the error here
# so if akismet is down it will raise an HTTPError or URLError
headers = {'User-Agent' : self.user_agent}
resp = self._safeRequest(url, urlencode(data), headers)
if resp.lower() == 'valid':
return True
else:
return False
def _build_data(self, comment, data):
"""
This function builds the data structure required by ``comment_check``,
``submit_spam``, and ``submit_ham``.
It modifies the ``data`` dictionary you give it in place. (and so
doesn't return anything)
It raises an ``AkismetError`` if the user IP or user-agent can't be
worked out.
"""
data['comment_content'] = comment
if not 'user_ip' in data:
try:
val = os.environ['REMOTE_ADDR']
except KeyError:
raise AkismetError("No 'user_ip' supplied")
data['user_ip'] = val
if not 'user_agent' in data:
try:
val = os.environ['HTTP_USER_AGENT']
except KeyError:
raise AkismetError("No 'user_agent' supplied")
data['user_agent'] = val
#
data.setdefault('referrer', os.environ.get('HTTP_REFERER', 'unknown'))
data.setdefault('permalink', '')
data.setdefault('comment_type', 'comment')
data.setdefault('comment_author', '')
data.setdefault('comment_author_email', '')
data.setdefault('comment_author_url', '')
data.setdefault('SERVER_ADDR', os.environ.get('SERVER_ADDR', ''))
data.setdefault('SERVER_ADMIN', os.environ.get('SERVER_ADMIN', ''))
data.setdefault('SERVER_NAME', os.environ.get('SERVER_NAME', ''))
data.setdefault('SERVER_PORT', os.environ.get('SERVER_PORT', ''))
data.setdefault('SERVER_SIGNATURE', os.environ.get('SERVER_SIGNATURE',
''))
data.setdefault('SERVER_SOFTWARE', os.environ.get('SERVER_SOFTWARE',
''))
data.setdefault('HTTP_ACCEPT', os.environ.get('HTTP_ACCEPT', ''))
data.setdefault('blog', self.blog_url)
def comment_check(self, comment, data=None, build_data=True, DEBUG=False):
"""
This is the function that checks comments.
It returns ``True`` for spam and ``False`` for ham.
If you set ``DEBUG=True`` then it will return the text of the response,
instead of the ``True`` or ``False`` object.
It raises ``APIKeyError`` if you have not yet set an API key.
If the connection to Akismet fails then the ``HTTPError`` or
``URLError`` will be propogated.
As a minimum it requires the body of the comment. This is the
``comment`` argument.
Akismet requires some other arguments, and allows some optional ones.
The more information you give it, the more likely it is to be able to
make an accurate diagnosise.
You supply these values using a mapping object (dictionary) as the
``data`` argument.
If ``build_data`` is ``True`` (the default), then *akismet.py* will
attempt to fill in as much information as possible, using default
values where necessary. This is particularly useful for programs
running in a {acro;CGI} environment. A lot of useful information
can be supplied from evironment variables (``os.environ``). See below.
You *only* need supply values for which you don't want defaults filled
in for. All values must be strings.
There are a few required values. If they are not supplied, and
defaults can't be worked out, then an ``AkismetError`` is raised.
If you set ``build_data=False`` and a required value is missing an
``AkismetError`` will also be raised.
The normal values (and defaults) are as follows : ::
'user_ip': os.environ['REMOTE_ADDR'] (*)
'user_agent': os.environ['HTTP_USER_AGENT'] (*)
'referrer': os.environ.get('HTTP_REFERER', 'unknown') [#]_
'permalink': ''
'comment_type': 'comment' [#]_
'comment_author': ''
'comment_author_email': ''
'comment_author_url': ''
'SERVER_ADDR': os.environ.get('SERVER_ADDR', '')
'SERVER_ADMIN': os.environ.get('SERVER_ADMIN', '')
'SERVER_NAME': os.environ.get('SERVER_NAME', '')
'SERVER_PORT': os.environ.get('SERVER_PORT', '')
'SERVER_SIGNATURE': os.environ.get('SERVER_SIGNATURE', '')
'SERVER_SOFTWARE': os.environ.get('SERVER_SOFTWARE', '')
'HTTP_ACCEPT': os.environ.get('HTTP_ACCEPT', '')
(*) Required values
You may supply as many additional 'HTTP_*' type values as you wish.
These should correspond to the http headers sent with the request.
.. [#] Note the spelling "referrer". This is a required value by the
akismet api - however, referrer information is not always
supplied by the browser or server. In fact the HTTP protocol
forbids relying on referrer information for functionality in
programs.
.. [#] The `API docs <http://akismet.com/development/api/>`_ state that this value
can be " *blank, comment, trackback, pingback, or a made up value*
*like 'registration'* ".
"""
if self.key is None:
raise APIKeyError("Your have not set an API key.")
if data is None:
data = {}
if build_data:
self._build_data(comment, data)
if 'blog' not in data:
data['blog'] = self.blog_url
url = '%scomment-check' % self._getURL()
# we *don't* trap the error here
# so if akismet is down it will raise an HTTPError or URLError
headers = {'User-Agent' : self.user_agent}
resp = self._safeRequest(url, urlencode(data), headers)
if DEBUG:
return resp
resp = resp.lower()
if resp == 'true':
return True
elif resp == 'false':
return False
else:
# NOTE: Happens when you get a 'howdy wilbur' response !
raise AkismetError('missing required argument.')
def submit_spam(self, comment, data=None, build_data=True):
"""
This function is used to tell akismet that a comment it marked as ham,
is really spam.
It takes all the same arguments as ``comment_check``, except for
*DEBUG*.
"""
if self.key is None:
raise APIKeyError("Your have not set an API key.")
if data is None:
data = {}
if build_data:
self._build_data(comment, data)
url = '%ssubmit-spam' % self._getURL()
# we *don't* trap the error here
# so if akismet is down it will raise an HTTPError or URLError
headers = {'User-Agent' : self.user_agent}
self._safeRequest(url, urlencode(data), headers)
def submit_ham(self, comment, data=None, build_data=True):
"""
This function is used to tell akismet that a comment it marked as spam,
is really ham.
It takes all the same arguments as ``comment_check``, except for
*DEBUG*.
"""
if self.key is None:
raise APIKeyError("Your have not set an API key.")
if data is None:
data = {}
if build_data:
self._build_data(comment, data)
url = '%ssubmit-ham' % self._getURL()
# we *don't* trap the error here
# so if akismet is down it will raise an HTTPError or URLError
headers = {'User-Agent' : self.user_agent}
self._safeRequest(url, urlencode(data), headers)

39
lib.py
View File

@ -302,3 +302,42 @@ def safe_template_context(ticket):
return context
def text_is_spam(text, request):
# Based on a blog post by 'sciyoshi':
# http://sciyoshi.com/blog/2008/aug/27/using-akismet-djangos-new-comments-framework/
# This will return 'True' is the given text is deemed to be spam, or
# False if it is not spam. If it cannot be checked for some reason, we
# assume it isn't spam.
from django.contrib.sites.models import Site
from django.conf import settings
try:
from helpdesk.akismet import Akismet
except:
return False
ak = Akismet(
blog_url='http://%s/' % Site.objects.get(pk=settings.SITE_ID).domain,
agent='Jutda Helpdesk',
)
if hasattr(settings, 'TYPEPAD_ANTISPAM_API_KEY'):
ak.setAPIKey(key = settings.TYPEPAD_ANTISPAM_API_KEY)
ak.baseurl = 'api.antispam.typepad.com/1.1/'
elif hasattr(settings, 'AKISMET_API_KEY'):
ak.setAPIKey(key = settings.AKISMET_API_KEY)
else:
return False
if ak.verify_key():
ak_data = {
'user_ip': request.META.get('REMOTE_ADDR', '127.0.0.1'),
'user_agent': request.META.get('HTTP_USER_AGENT', ''),
'referrer': request.META.get('HTTP_REFERER', ''),
'comment_type': 'comment',
'comment_author': '',
}
return ak.comment_check(text, data=ak_data)
return False

13
templates/helpdesk/public_spam.html Normal file
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@ -0,0 +1,13 @@
{% extends "helpdesk/public_base.html" %}{% load i18n %}
{% block helpdesk_body %}
<h2>{% trans "Unable To Open Ticket" %}</h2>
{% blocktrans %}<p>Sorry, but there has been an error trying to submit your ticket.</p>
<p>Our system has marked your submission as <strong>spam</strong>, so we are unable to save it. If this is not spam, please press back and re-type your message. Be careful to avoid sounding 'spammy', and if you have heaps of links please try removing them if possible.</p>
<p>We are sorry for any inconvenience, however this check is required to avoid our helpdesk resources being overloaded by spammers.</p>
{% endblocktrans %}
{% endblock %}

6
views/public.py
View File

@ -16,7 +16,7 @@ from django.template import loader, Context, RequestContext
from django.utils.translation import ugettext as _
from helpdesk.forms import PublicTicketForm
from helpdesk.lib import send_templated_mail
from helpdesk.lib import send_templated_mail, text_is_spam
from helpdesk.models import Ticket, Queue
@ -31,6 +31,10 @@ def homepage(request):
form = PublicTicketForm(request.POST, request.FILES)
form.fields['queue'].choices = [('', '--------')] + [[q.id, q.title] for q in Queue.objects.filter(allow_public_submission=True)]
if form.is_valid():
if text_is_spam(form.cleaned_data['body'], request):
# This submission is spam. Let's not save it.
return render_to_response('helpdesk/public_spam.html', RequestContext(request, {}))
else:
ticket = form.save()
return HttpResponseRedirect('%s?ticket=%s&email=%s'% (
reverse('helpdesk_public_view'),