var request = require('superagent');

var INTERVAL = 1500;

function rangeRequest (start, end) {
    request
      .get(//TODO your server here)
      .set('Range:', 'bytes=' + start + '-' + end)
      .set('Accept', '*/*')
      .set ('Cache-Control:','no-cache')
      .end(function(error, res){
        console.log (res);
      });
}

var when = Math.round(Math.random() * 10 * 1000);

setInterval (function () {
    setTimeout (function () {
        var start = Math.round(Math.random() * 5000);
        var end = start + Math.round(Math.random() * 5000000);

        console.log ("send a random request. start, end: " + start + ", " + end);

        rangeRequest (start, end);
    }, when);

}, INTERVAL);