unblocker/examples/blacklist/blacklist.js

Web proxy for evading internet censorship & general-purpose library for rewriting remote websites.

'use strict';

const URL = require('url');

module.exports = function({ blockedDomains, message }) {

  function isRequestBlocked(data) {
    const { hostname } = URL.parse(data.url);
    return blockedDomains.some(blockedDomain => hostname === blockedDomain || hostname.endsWith(`.${blockedDomain}`));
  }

  function checkBlacklist(data) {
    if (isRequestBlocked(data)) {
      data.clientResponse.status(400).send(message)
    }
  }

  return checkBlacklist;
};