Revize f25c5f14

fixed LoadGraphData servlet not to delete JSON from session which caused failure on page reload

sources/src/main/java/cz/zcu/kiv/offscreen/servlets/api/LoadGraphData.java

@@ -54 +54 @@
      * Return json of file which was uploaded and is stored in session.
      */
     private String getDiagramFromSession(HttpServletRequest request) throws IOException {
-
-        String jsonToDisplay = (String)request.getSession().getAttribute("json_graph");
-        request.getSession().removeAttribute("json_graph");
+        String jsonToDisplay = (String) request.getSession().getAttribute("json_graph");
 
         if (!Strings.isNullOrEmpty(jsonToDisplay)) {
             GraphManager graphManager = new GraphJSONDataLoader(jsonToDisplay).LoadData();