Simple node.js proxy with dynamic route lookups via Redis

server.js

const http = require('http');
const httpProxy = require('http-proxy');
const redis = require('redis');

// listen port
const port = 5050;

// redis client
const client = redis.createClient();

// create proxy server
const proxy = httpProxy.createProxyServer({});

// create the server
const server = http.createServer((req, res) => {
  const fqdn = req.headers.host.split(':')[0];
  const hostname = fqdn.split('.')[0];

  // redis lookup
  client.hget('routes', fqdn, (err, data) => {
    if (data) {
      const route = data.split(':');
      const target = { host: route[0], port: route[1] };

      // proxy the request upstream
      proxy.web(req, res, {
        target: target
      });
      console.log(`DEBUG: routing ${hostname} to ${target.host}:${target.port}`);
    } else {
      // send a 404 and close the connection if no route was found
      res.writeHead(404);
      res.end();
      console.log(`DEBUG: no route found for ${hostname}`);
    }
  });
});

server.listen(port);
console.log(`DEBUG: listening on port ${port}`);