reuse nodejs socket for HTTP request

sock_http_reuse.js

const net = require('net');
const http = require('http');

let client = new net.Socket();
let httpAgent = new http.Agent({keepAlive: true});

let sock = httpAgent.createConnection({port: 80, host:'localhost'}, (err, sock) => {
    if(err) {
        console.error(err);
    }
});

sock.on('connect', () => {
    console.log('socket connected');

    let options = {
        host: 'localhost',
        port: 80,
        path: '/',
        method: 'GET',
        createConnection: function() {
            return sock;
        }
    };
    console.log(options);

    let req = http.request(options, (res) => {
        res.on('data', (data) => {
            console.log('And here is the result');
            console.log(data.toString('utf8'));
        });

        res.on('error', (err) => {
            console.error(err);
        });
    });

    setTimeout(function () {
        console.log('Just slept for 3 seconds');
        console.log('Now lets send the request');
        req.end();
    }, 3000);
});