block ad servers from pgl.yoyo.org

privbloxy.py

@@ -0,0 +1,96 @@
+#!/usr/bin/env python
+# -----------------------------------------------------------
+# grabs list of ad servers from pgl.yoyo.org and 
+# sets up privoxy to block the enumerated domains
+# *note*: be sure to update variables down there ;]
+#
+# usage: python privbloxy.py
+# -----------------------------------------------------------
+
+import urllib2 
+
+# -----------------------------------------------------------
+# re-write privoxy config, but add in the ads actionfile
+# -----------------------------------------------------------
+def add_ads_action(dir, lines, user_line):
+    line_num = 0
+    config = open(dir + "/config.txt", "w")
+    for line in lines:
+        config.write(line)        
+        if line_num == user_line:
+            config.write("actionsfile ads.action       # Blocking ad servers enumerated on pgl.yoyo.org\n")
+        line_num += 1
+    config.close()
+
+
+# -----------------------------------------------------------
+# determine whether ads actionfile entry exists or update
+# -----------------------------------------------------------
+def check_config(dir):
+    ads_entry = False
+    curr_line = 0
+    user_line = 0
+
+    config_lines = open(privoxy_dir + "/config.txt", "r").readlines()
+    for line in config_lines:    
+        # -----------------------------------------------------------
+        # check for ads action file; bail if present
+        # -----------------------------------------------------------
+        if line.startswith("actionsfile ads.action"):
+            ads_entry = True
+            break
+        # -----------------------------------------------------------
+        # line after user actions was not ads actions
+        # -----------------------------------------------------------
+        if user_line > 0:
+            add_ads_action(privoxy_dir, config_lines, user_line)
+            break
+        # -----------------------------------------------------------
+        # note location of user actions
+        # -----------------------------------------------------------
+        if line.startswith("actionsfile user.action"):
+            user_line = curr_line
+        curr_line += 1
+
+
+# -----------------------------------------------------------
+# parse and set actionfile contents
+# -----------------------------------------------------------
+def parse_adfile(adfile):
+    adlist = "{+block{Ad domains from pgl.yoyo.org} +handle-as-empty-document}\n"
+    lines = adfile.readlines()
+    for line in lines:
+        # -----------------------------------------------------------
+        # skip comment lines starting with '#' and blank lines
+        # -----------------------------------------------------------
+        if line.startswith("#") or not line.strip():
+            continue        
+        # -----------------------------------------------------------
+        # domains are separated by commas
+        # -----------------------------------------------------------        
+        adlist = adlist + line.replace(",", "\n")
+
+    return adlist
+
+
+# -----------------------------------------------------------
+# download latest ads list, parse, and write to file
+# -----------------------------------------------------------
+def set_adlist(dir, url):
+    adfile = urllib2.urlopen(url)
+    adlist = parse_adfile(adfile)
+    actionfile = open(dir + "/ads.action", "w")
+    actionfile.write(adlist)
+    actionfile.close()
+
+
+
+
+# -----------------------------------------------------------
+# configuration stuffs, adjust accordingly
+# -----------------------------------------------------------
+privoxy_dir = "C:/Program Files/Privoxy"
+adlist_url = "http://pgl.yoyo.org/adservers/serverlist.php?hostformat=one-line&showintro=0&mimetype=plaintext"
+
+check_config(privoxy_dir)
+set_adlist(privoxy_dir, adlist_url)