disposed request stream data

request-stream-pipe-demo.js

'use strict';

const http = require('http');
const url = require('url');
const request = require('request');

const server = http.createServer((req, res) => {
  const destUrl = req.url.slice(1);

  if (!destUrl) {
    res.writeHead(400);
    return res.end('Please supply destination url');
  }

  const parsedDest = url.parse(destUrl);

  if (!(parsedDest && parsedDest.protocol)) {
    res.writeHead(400);
    return res.end('Unsupported or missing protocol');
  }


  request({
    method: 'GET',
    url: destUrl,
    encoding: null
  }).on('response', (_res) => {
    if (_res.statusCode.toString().slice(0, 1) !== '2') {
      res.writeHead(502);
      return res.end();
    }
    
       
    setTimeout(() => {
      _res.pipe(res);
    }, 100);
  });
});


server.listen(9000, () => {
  console.log('Server listening on port 9000...');
});