advanced PAC

Advanced proxy auto-config (PAC) script

var proxy_addr = ["SOCKS5 127.0.0.1:9050"]

/* or you can select from an array randomly */

/*
var proxy_addr = [
    "SOCKS5 127.0.0.1:9050",
    "SOCKS5 127.0.0.2:9050",
    "SOCKS5 127.0.0.3:9050",
    "SOCKS5 127.0.0.4:9050"
]
*/


var count = 0 /* keeps the number of requests */
var hostCounter = {} /* keeps the number of requests to each host */

var ignore_assistant = '127.0.0.1'

/* list of URLs which we don't have to proxy*/
var urlsToIgnore = ['https://example.com/path/to?a=1']


/* list of hosts which we don't have to proxy */
var hostsToIgnore = [
    'localhost', '127.0.0.1',

    '*.example.com', 'example.com'
]

function FindProxyForURL(url, host) {

    /* You can see alert message on browser console. */
    alert(`requesting -> ${url}`)

    /* Adds a host to ignore list on the fly
     * Call the following URL on your browser to add a host to your ignore list:
     *      http://127.0.0.1/?host_to_ignore=*.example.com
     */
    if(host === ignore_assistant) {
        let m = url.match(/\?host_to_ignore=(.*?)$/)

        if(m.length == 2) {
            let _host = m[1]

            hostsToIgnore.push(_host)
            alert(`Added "${_host}" to ignore list!`)
        }
    }

    if(hostCounter[host] !== undefined)
        hostCounter[host]++
    else
        hostCounter[host] = 0

    if(hostCounter[host] < 16) {
        let _count = hostCounter[host]
        alert(`\n${count} ->\n${dnsResolve(host)}\t\t${host} (${_count})\n\n${url}\n`)
    }

    count++

    for (var u of urlsToIgnore)
        /* or you can say if (url.startsWith(u)) or validate using regex */
        if (url == u) {
          alert(`DIRECT REQUEST TO URL: ${url} (${u})`)
          return "DIRECT"
        }

    for (var h of hostsToIgnore)
        if (shExpMatch(host, h)) {
            alert(`DIRECT REQUEST TO HOST: ${host} (${h})`)
            return "DIRECT"
        }

    return proxy_addr[~~(Math.random() * proxy_addr.length)]

}

/* Welcome message that prints ignore assistant hostname on browser console */
alert(`Proxy Auto-Config is loaded. Ignore assistant hostname is ${ignore_assistant}`)

You can also add this bookmark to your browser to ease ignore process:

javascript:(function(){var host = prompt('Ignore proxy for this host?', location.hostname);window.open(`https://127.0.0.1/?host_to_ignore=${host}`, '_blank')})()