Port farwarding in nodejs

server-port-farwarding.js

const http = require('http');

http.createServer((req,res)=>{
  let route = req.url;
  if(route == '/'){
    res.end('root route.')
  }else if(route == '/hello'){
    res.end('hello')
  }
}).listen(3000,()=>{console.log('listening on a domain')})


/**
 * @link https://gist.github.com/extronics/2043518
 * run command :- node server.js 80 127.0.0.1 3000
 * go to browser and http://localhost/
 */
const net = require('net');

domainPort = process.argv[2];
targetHost = process.argv[3];
targetPort = process.argv[4];

net.createServer((connIn)=>{
  let connOut = net.createConnection(targetPort,targetHost);
  connIn.pipe(connOut);
  connOut.pipe(connIn);

  connOut.on("end",connIn.end.bind(connIn));
  connIn.on('end',connOut.end.bind(connOut))
}).listen(domainPort)