text: // Listen on a specific host via the HOST environment variable
  var host = process.env.HOST || '0.0.0.0';
  // Listen on a specific port via the PORT environment variable
  var port = process.env.PORT || 8080;
  
  // Grab the blacklist from the command-line so that we can update the blacklist without deploying
  // again. CORS Anywhere is open by design, and this blacklist is not used, except for countering
  // immediate abuse (e.g. denial of service). If you want to block all origins except for some,
  // use originWhitelist instead.
  var originBlacklist = parseEnvList(process.env.CORSANYWHERE_BLACKLIST);
  var originWhitelist = parseEnvList(process.env.CORSANYWHERE_WHITELIST);
  function parseEnvList(env) {
    if (!env) {
      return [];
    }
    return env.split(',');
  }
  
  // Set up rate-limiting to avoid abuse of the public CORS Anywhere server.
  var checkRateLimit = require('./lib/rate-limit')(process.env.CORSANYWHERE_RATELIMIT);
  
  var cors_proxy = require('./lib/cors-anywhere');
  cors_proxy.createServer({
    originBlacklist: originBlacklist,
    originWhitelist: originWhitelist,
    checkRateLimit: checkRateLimit,
    removeHeaders: [
      'cookie',
      'cookie2',
      // Strip Heroku-specific headers
      'x-heroku-queue-wait-time',
      'x-heroku-queue-depth',
      'x-heroku-dynos-in-use',
      'x-request-start',
    ],
    redirectSameOrigin: true,
    httpProxyOptions: {
      // Do not add X-Forwarded-For, etc. headers, because Heroku already adds it.
      xfwd: false,
    },
  }).listen(port, host, function() {
    console.log('Running CORS Anywhere on ' + host + ':' + port);
  });
  