check_spa.js

// Check loading of Single Page Application
//
// It checks the count of requests equals the count of response
// of loading of SPA

var page = require('webpage').create();
var system = require('system');

var lastReceived = new Date().getTime();
var requestCount = 0;
var responseCount = 0;
var requestIds = [];
var status = 'OK'

page.onResourceReceived = function (response) {
    if (response.status >= 400) {
      status = 'KO'
    }

    if(requestIds.indexOf(response.id) !== -1) {
        lastReceived = new Date().getTime();
        responseCount++;
        requestIds[requestIds.indexOf(response.id)] = null;
    }
};
page.onResourceRequested = function (request) {
    if(requestIds.indexOf(request.id) === -1) {
        requestIds.push(request.id);
        requestCount++;
    }
};

if (system.args.length < 2) {
  console.log("Usage : phantomjs " +system.args[0] + " url [timeout]")
  console.log("  url : http://www.google.fr")
  console.log("  timeout : wait x ms after the last request")
  phantom.exit()
}

var url = system.args[1];
var timeout = system.args.length > 2 ? system.args[2] : 1000; // Default value 1s

// Open the page
page.open(url, function () {});

var checkComplete = function () {
  if(status == 'KO') {
    console.log('[' + date.toISOString() + '] - Fail to load application : Bad status code');
    phantom.exit(1);
  }

  if(new Date().getTime() - lastReceived > timeout)  {
    clearInterval(checkCompleteInterval);
    date = new Date()
    if(requestCount !== responseCount) {
      console.log('[' + date.toISOString() + '] - Fail to load application : Timeout');
      phantom.exit(1);
    } else {
      console.log('[' + date.toISOString() + '] - Success');
      phantom.exit();
    }
  }
}

// Let us check to see if the page is finished rendering
var checkCompleteInterval = setInterval(checkComplete, 1);

if ( !Date.prototype.toISOString ) {
  ( function() {

    function pad(number) {
      var r = String(number);
      if ( r.length === 1 ) {
        r = '0' + r;
      }
      return r;
    }

    Date.prototype.toISOString = function() {
      return this.getUTCFullYear()
        + '-' + pad( this.getUTCMonth() + 1 )
        + '-' + pad( this.getUTCDate() )
        + 'T' + pad( this.getUTCHours() )
        + ':' + pad( this.getUTCMinutes() )
        + ':' + pad( this.getUTCSeconds() )
        + '.' + String( (this.getUTCMilliseconds()/1000).toFixed(3) ).slice( 2, 5 )
        + 'Z';
    };

  }() );
}

usage

#!/bin/bash

phantomjs check_spa.js http://www.google.fr
phantomjs check_spa.js http://www.google.fr 5000 # Wait 5 seconds after the last response

while true
do
  phantomjs check_spa.js http://www.google.fr 5000
  sleep 60
done