ad/tracker blocker that works at a system level

ad-tracker-block.js

'use strict'

const blacklist = [
	/analytics/,
	/fullstory/,
	/amplitude/,
	/crashlytics\.com/,
	/doubleclick\.net/,
	/chartbeat\.(net|com)/,
	/deepintent\.com/,
	/amazon-adsystem\.com/,
	/b\.scorecardresearch\.com/,
	/px\.dynamicyield\.com/,
	/js-agent\.newrelic\.com/,
	/mobile-collector\.newrelic\.com/,
	/urbanairship\.com/,
	/moatads\.com/,
	/engine\.mobileapptracking\.com/,
	/m\.quantcount\.com/,
	/ingest\.crittercism\.com/,
	/demdex\.(net|com)/,
	/flurry\.com/,
	/tubemogel\.com/,
	/localytics\.com/,
	/adroll\.com/,
	/ensighten\.com/,
	/appsflyer\.com/,
	/outbrain\.com/,
	/gigya\.com/,
	/krxd\.net/,
	/advertising\.com/,
	/(metrics)\.cnn\.com/,
	/postrelease\.com/,
	/nativo\.net/,
	/liverail\.com/,
	/btrll\.com/,
	/clicktale\.net/,
	/adsrvr\.org/,
	/adjust\.com/,
	/mixpanel\.com/,
	/quantserve\.com/,
	/skimresources\.com/,
	/exelator\.com/,
	/rubiconproject\.com/
]

var passive = false

process.stdin.on('data', data => {
	var s = data.toString('utf8').trim()
	if (s === 'passive') {
		console.log(chalk.blue('passive mode: on'))
		passive = true
	} else if (s === 'block') {
		console.log(chalk.yellow('passive mode: off'))
		passive = false
	}
})

const socks = require('socksv5')
const chalk = require('chalk')
const srv = socks.createServer((info, accept, deny) => {
	for (let r of blacklist) {
		if (r.test(info.dstAddr)) {
			if (!passive) {
				console.log(chalk.red(`TRACKER: ${info.dstAddr}`))
				deny()
				return
			} else {
				console.log(chalk.yellow(`TRACKER: ${info.dstAddr}`))
				break
			}
		}
	}
	console.log(chalk.green(`${info.cmd}: ${info.dstAddr}:${info.dstPort}`))
	accept()
})
srv.listen(8089, '0.0.0.0', () => {
	console.log(chalk.blue('SOCKS server listening on port 8089'))
})
srv.useAuth(socks.auth.None())

// to configure an iOS device
const pac = `function FindProxyForURL(url, host)
{ 
	return "SOCKS ${require('os').hostname()}:8089";
}
`
require('http').createServer((req, res) => {
	res.end(pac)
}).listen(8090)