// server.js
const host = process.env.HOST || '127.0.0.1';
const port = process.env.PORT || 4444;
const originBlacklist = parseEnvList(process.env.CORSANYWHERE_BLACKLIST);
const originWhitelist = parseEnvList(process.env.CORSANYWHERE_WHITELIST);

function parseEnvList(env) {
  if (!env) {
    return [];
  }
  return env.split(',');
}

const corsAnywhere = require('cors-anywhere');
corsAnywhere.createServer({
  originBlacklist,
  originWhitelist,
  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: {
    xfwd: false,
  },
}).listen(port, host, function() {
  console.log('Running CORS proxy on ' + host + ':' + port);
});