client.js

/**
 * This simulates a browser aborting XHR requests
 * 
 * needs: npm install request
 */

var request = require('request');

var batch = 20;
var abortTime = 50 // timed so that many requests are aborted

function get(i) {
  var req = request('http://localhost:9001', function (error, response, body) {
    if (!error) {
        console.log('successful', i);
    } else {
        console.log('error', i);
    }
  });

  setTimeout( () => req.abort(), abortTime);
}

setInterval(() => {
    console.log(`Do ${batch} requests and abort each after ${abortTime}`);
    for(var i=0; i<batch; i++) {
        get(i);
    }
}, 100);

server.js

/**
 * This listens for a request from the client then does
 * a GET request on another server and pipes the result back.
 * 
 * I do a
 *      watch -n 0.5 cat /proc/net/sockstat
 * to monitor the tcp mem stats.
 */
var http = require('http');

http.createServer(function (req, res) {
  var connector = http.get('http://jsonplaceholder.typicode.com/photos', received => received.pipe(res));
  req.pipe(connector);
}).listen(9001);