Ad Blocking script for dnsmasq. This uses Steven Black's Ad Blocking /etc/hosts file but converts it to dnsmasq format. For use with either an AdBlocking Raspberry PI project (PiHole) or on a Unify EdgeRouter

filter_unicode.py

import sys

for buffer in sys.stdin.read():
  for ch in buffer:
    if (ord(ch) < 128):
      sys.stdout.write(ch)

update-adblock-dnsmasq.sh

#!/bin/bash

ad_hosts_url="https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts"

# The IP address below should point to the IP where blocked traffic should go
# or to a non routable address such as 0.0.0.0

# OpenDNS block page
# pixelserv_ip="146.112.61.104"
# not routable address
pixelserv_ip="0.0.0.0"

ad_file="/etc/dnsmasq.d/dnsmasq.adlist.conf"
temp_ad_file="/tmp/dnsmasq.adlist.conf.tmp"

#cat hosts | \
curl -sk ${ad_hosts_url} | \
	python filter_unicode.py | \
	sed "/^\s*\#/d" - | \
	sed "/^\s*\$/d" - > ${temp_ad_file}

if [ -f "$temp_ad_file" ]
then
    # blacklist sites
    cat << EOF >> ${temp_ad_file}
0.0.0.0 dclk-match.dotomi.com
0.0.0.0 cdn.spotxcdn.com
0.0.0.0 login-ds.dotomi.com
EOF

    # convert to dnsmasq
    cat ${temp_ad_file} | \
        sed '/whitelist-domain-here\.com/d' - | \
    	awk '$1 == "0.0.0.0" { print "address=/" $2 "/" $1 "/" }' - | \
            sort | uniq > ${ad_file}
        
    rm -f ${temp_ad_file}
else
    echo "Error building the ad list, please try again."
    exit
fi

/etc/init.d/dnsmasq force-reload