code: @RequestMapping("/proxy.action")
      public @ResponseBody
      ResponseEntity<?> doProxy(HttpServletRequest request, @RequestParam String baseUrl, @RequestParam(required = false) Map<String, String> params) {
          return proxyService.doProxy(request, baseUrl, params);
      }
docs: Web controller mapping <i>proxy.action</i> to doProxy method. Provided parameters are passed to {@link HttpProxyService}
  
  @param request {@link HttpServletRequest} to use in proxy (e.g. to obtain headers from)
  @param baseUrl The base url of request
  @param params  Request params
  @return ResponseEntity