From 6afe84d34afa76071f45b0eb9ca4d1f5cd0417c1 Mon Sep 17 00:00:00 2001
From: jaseg <code@jaseg.net>
Date: Sun, 24 Jan 2016 18:34:03 +0100
Subject: README: Add crate layout guide
---
host/secret_sauce.py | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 50 insertions(+), 1 deletion(-)
(limited to 'host')
diff --git a/host/secret_sauce.py b/host/secret_sauce.py
index bf183ac..3682b0e 100644
--- a/host/secret_sauce.py
+++ b/host/secret_sauce.py
@@ -1,7 +1,56 @@
+from collections import defaultdict
+import signal
+
+
+RATELIMIT_THRESHOLD = 20
+GRAYLIST_LENGTH = 8
+
class SpamError(ValueError):
def __str__(self):
return ' '.join(self.args)
+
+def loadlist(fn):
+ try:
+ with open(fn) as f:
+ return [ l for l in ( l.strip() for l in f.readlines() if not l.startswith('#')) if l ]
+ except:
+ return []
+
+greenlist = set()
+
+graylist = []
+def do_graylist(msg):
+ global graylist
+ graylist = [msg] + graylist[:GRAYLIST_LENGTH-1]
+
+blacklist = loadlist('blacklist')
+badwords = loadlist('badwords')
+def signal_handler(_signum, _frame):
+ global blacklist, badwords
+ blacklist = load_blacklist()
+ badwords = load_badwords()
+signal.signal(signal.SIGHUP, signal_handler)
+
+ratelimitdict = defaultdict(lambda: 0)
+def empty_ratelimit(_signum, _frame):
+ global ratelimitdict
+ ratelimitdict = defaultdict(lambda: 0)
+signal.signal(signal.SIGALRM, empty_ratelimit)
+signal.setitimer(signal.ITIMER_REAL, 60)
+
def check_spam(addr, data):
- pass
+ ratelimitdict[addr] += 1
+ try:
+ if ratelimitdict[addr] > RATELIMIT_THRESHOLD:
+ raise SpamError('rate-limit')
+ if any(word in data.lower() for word in badwords):
+ raise SpamError('badwords filter')
+ if addr not in greenlist and data in graylist:
+ raise SpamError('graylist')
+ except SpamError as err:
+ do_graylist(data)
+ blacklist.append(addr)
+ raise err
+ greenlist.add(addr)
--
cgit