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annotate gpp/antispam/utils.py @ 215:8c1832b9d815

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Implement #84; additional checks on spammers; implement stranger status.
author Brian Neal <bgneal@gmail.com>
date Sat, 29 May 2010 04:51:28 +0000
parents 28988cce138b
children 767cedc7d12a
rev   line source
bgneal@214 1 """Antispam utility functions other apps can use."""
bgneal@215 2 import datetime
bgneal@215 3 import logging
bgneal@215 4 import textwrap
bgneal@215 5
bgneal@214 6 from django.core.cache import cache
bgneal@214 7
bgneal@214 8 from antispam import SPAM_PHRASE_KEY
bgneal@214 9 from antispam.models import SpamPhrase
bgneal@215 10 from core.functions import email_admins
bgneal@215 11 from bio.models import STA_SUSPENDED
bgneal@214 12
bgneal@214 13
bgneal@214 14 def contains_spam(s):
bgneal@214 15 """This function returns True if the supplied string s contains any spam
bgneal@214 16 phrases and False otherwise.
bgneal@214 17 """
bgneal@214 18 phrases = _get_spam_phrases()
bgneal@215 19 s = s.lower()
bgneal@214 20 for spam in phrases:
bgneal@214 21 if spam in s:
bgneal@214 22 return True
bgneal@214 23
bgneal@214 24 return False
bgneal@214 25
bgneal@214 26
bgneal@215 27 def spam_check(request, content):
bgneal@215 28 """This function checks the supplied content for spam if the user from the
bgneal@215 29 supplied request is a stranger (new to the site). If spam is found, the
bgneal@215 30 function makes a log entry, emails the admins, suspends the user's account
bgneal@215 31 and returns True. If spam is not found, False is returned.
bgneal@215 32 It is assumed that request.user is an authenticated user and thus has a
bgneal@215 33 user profile.
bgneal@215 34 """
bgneal@215 35 user = request.user
bgneal@215 36 if user.get_profile().is_stranger() and contains_spam(content):
bgneal@215 37
bgneal@215 38 ip = request.META.get('REMOTE_ADDR', "unknown")
bgneal@215 39
bgneal@215 40 msg = textwrap.dedent("""\
bgneal@215 41 SPAM FILTER TRIPPED by %s
bgneal@215 42 PATH: %s
bgneal@215 43 IP: %s
bgneal@215 44 Message:
bgneal@215 45 %s
bgneal@215 46 """ % (user.username, request.path, ip, content))
bgneal@215 47
bgneal@215 48 logging.info(msg)
bgneal@215 49 email_admins("SPAM FILTER TRIPPED BY %s" % user.username, msg)
bgneal@215 50 suspend_user(user)
bgneal@215 51 return True
bgneal@215 52
bgneal@215 53 return False
bgneal@215 54
bgneal@215 55
bgneal@215 56 def suspend_user(user):
bgneal@215 57 """This function marks the user as suspended."""
bgneal@215 58 user.is_active = False
bgneal@215 59 user.save()
bgneal@215 60 profile = user.get_profile()
bgneal@215 61 profile.status = STA_SUSPENDED
bgneal@215 62 profile.status_date = datetime.datetime.now()
bgneal@215 63 profile.save()
bgneal@215 64
bgneal@215 65
bgneal@214 66 def _get_spam_phrases():
bgneal@214 67 """This function returns the current list of spam phrase strings.
bgneal@214 68 The strings are cached to avoid hitting the database.
bgneal@214 69 """
bgneal@214 70 phrases = cache.get(SPAM_PHRASE_KEY)
bgneal@214 71 if phrases:
bgneal@214 72 return phrases
bgneal@214 73
bgneal@214 74 phrases = SpamPhrase.objects.values_list('phrase', flat=True)
bgneal@214 75 cache.set(SPAM_PHRASE_KEY, phrases)
bgneal@214 76 return phrases