title: Non blocking Ajax request to PHP
body: <p>I'm using PHP to download a (big) file from a remote server and this download is triggered by clicking on a download button on a web page.</p>
  
  <p>So when i click the <code>download</code> button on the web page, then an <code>Ajax</code> request (with angulars <code>$http</code>) is made to a PHP function. That function triggers a download using <code>cURL</code>.</p>
  
  <p>In the mean time I'd like to make other requests to my PHP site with Ajax. But all other Ajax requests show the status <code>Pending</code> as long as the download is in progress.</p>
  
  <p>So basically the download is blocking every other request to PHP. Is there any way I can avoid this blockage?</p>