ueditor粘贴抓取远程图片时，本地请求可以成功，云上服务器就会出现400状态错误，无法访问到后台，这个是什么问题？前台iview,后台spring MVC。
后台代码：

    @RequestMapping(value="/uploadUEImg", method={RequestMethod.GET, RequestMethod.POST, RequestMethod.OPTIONS})
    @ResponseBody
    public void editorUpload(HttpServletRequest request, HttpServletResponse response, String action) {
            if("catchimage".equals(action)){
                String exec = new ActionEnter(request, rootPath, realPath).exec();
                PrintWriter writer = response.getWriter();
                writer.write(exec);
                writer.flush();
                writer.close();
            }
     }