title: 403 Sling Post servlet
body: <p>I'm following this blog <a href="http://blogs.adobe.com/experiencedelivers/experience-management/how_to_upload_animageviaslingpostservlet/" rel="nofollow">post</a>. But I'm getting 403 error in AEM 6.1. 
  I do not want to change in 'Apache Sling Referrer Filter'. 
  I think this error is coming because of CSRF token which I can get by calling /libs/granite/csrf/token.json</p>
  
  <p>But how can I add this CSRF token in this form header? Or is there any other way to make it work?</p>