fix #284

router.go

@@ -461,6 +461,8 @@ func (p *ControllerRegistor) ServeHTTP(rw http.ResponseWriter, r *http.Request)
 			file := staticDir + r.URL.Path[len(prefix):]
 			finfo, err := os.Stat(file)
 			if err != nil {
+				Warn(err)
+				http.NotFound(w, r)
 				return
 			}
 			//if the request is dir and DirectoryIndex is false then