http-proxy.pac file

http-proxy.pac

function FindProxyForURL(url, host) {
  var PROXY_LIST_FILE = 'https://raw.githubusercontent.com/TheSpeedX/PROXY-List/master/http.txt';
  var TEST_TARGET_URL = 'https://google.com';
  var TEST_TIMEOUT = 5000;
  var proxyList = [];

  function addProxy(proxy) {
    if (proxyList.indexOf(proxy) === -1) {
      proxyList.push(proxy);
    }
  }

  function testProxy(proxy) {
    function isHostReachable() {
      try {
        return shExpMatch(host, proxy);
      } catch (err) {
        return false;
      }
    }

    function testHttpProxy(proxy) {
      try {
        var proxyUrl = 'http://' + proxy;
        var proxyConfig = {
          proxy: { http: proxyUrl },
        };

        var res = $http.get(TEST_TARGET_URL, {
          sys: proxyConfig,
          timeout: TEST_TIMEOUT,
        });

        return res.status === 200;
      } catch (err) {
        return false;
      }
    }

    function testSocksProxy(proxy) {
      try {
        var proxyUrl = 'socks://' + proxy;
        var proxyConfig = {
          proxy: { socks: proxyUrl },
        };

        var res = $http.get(TEST_TARGET_URL, {
          sys: proxyConfig,
          timeout: TEST_TIMEOUT,
        });

        return res.status === 200;
      } catch (err) {
        return false;
      }
    }

    if (isHostReachable()) {
      if (testHttpProxy(proxy)) {
        addProxy(proxy);
        return 'PROXY ' + proxy;
      }
      if (testSocksProxy(proxy)) {
        addProxy(proxy);
        return 'SOCKS ' + proxy;
      }
    }

    return 'DIRECT';
  }

  var proxyContent = $http.get(PROXY_LIST_FILE).body;
  var proxies = proxyContent.split('\n');
  for (var i = 0; i < proxies.length; i++) {
    var proxy = proxies[i].trim();
    if (proxy.length > 0) {
      testProxy(proxy);
    }
  }

  if (proxyList.length > 0) {
    return proxyList.join(';') + '; DIRECT';
  }

  return 'DIRECT';
}