code: protected void handleUpload(HttpServletRequest request, HttpServletResponse response) {
  
          String sessionIdStr = request.getParameter(CmsUgcConstants.PARAM_SESSION_ID);
          CmsUUID sessionId = new CmsUUID(sessionIdStr);
          CmsUgcSession session = CmsUgcSessionFactory.getInstance().getSession(request, sessionId);
          session.getFormUploadHelper().processFormSubmitRequest(request);
      }
docs: Handles all multipart requests.<p>
  
  @param request the request
  @param response the response