Full DoH recursive resolver implemented on Cloudflare Workers
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#!/bin/bash
function import_hosts() {
local url=$1
# Trim lines, remove comments, convert tabs to spaces, collapse multiple spaces, and
# take the second column of the output
curl "$url"| sed -E 's/^[ \t]+//g' | sed '/^#/d' | sed 's/\t/ /g' | sed -E 's/[ ]+/ /g' | cut -d ' ' -f 2 | grep '\S'
}
# In blocklist_config, put a list of URLs to shared ad-blocking hosts files
# e.g.
# URL=(
# "https://some-domain/hosts"
#)
. ./blocklist_config.sh
echo "" > blocklist.txt
for url in ${URLS[@]}; do
echo "Importing $url"
import_hosts $url >> blocklist.txt
done