Unable to upload file when using JQuery file upload, Spring MVC and Spring Security. -

i implementing simple website image upload. frameworks in use jquery file upload spring mvc spring security

i've implemented form , controller file upload when trying read files, files seems unavailable. i've struggled security _csrf while i've figured out. when try read files no files can read when reaching controller. here source code https://gist.github.com/adelinghanaem/f67b311cda7aa9efe83c

after lot of debugging , checking spring security/mvc architecture i've came with:

@requestmapping(value = "/upload", method = requestmethod.post) public responseentity<uploadpictureresult> pictureupload(firewalledrequest initialrequest) {      defaultmultiparthttpservletrequest request = (defaultmultiparthttpservletrequest) initialrequest.getrequest();      try {         multipartfile multipartfile  = request.getfile("files[]");         list<multipartfile> multipartfilelist = request.getfiles("files[]");          iterator<string> iterator = request.getfilenames();          while (iterator.hasnext()) {             multipartfile file = request.getfile(iterator.next());             service.save(toimage(file));         }     } catch (exception e) {         return new responseentity<uploadpictureresult>(new uploadpictureresult(),                 httpstatus.internal_server_error);     }      return new responseentity<uploadpictureresult>(new uploadpictureresult(), httpstatus.ok); } 

notice firewallrequest !!!