fix bug for static file like /static /static_js /static_css

@@ -548,11 +548,16 @@ func (p *ControllerRegistor) ServeHTTP(rw http.ResponseWriter, r *http.Request)
 	for prefix, staticDir := range StaticDir {
 		if r.URL.Path == "/favicon.ico" {
 			file := path.Join(staticDir, r.URL.Path)
-			http.ServeFile(w, r, file)
-			w.started = true
-			goto Admin
+			if utils.FileExists(file) {
+				http.ServeFile(w, r, file)
+				w.started = true
+				goto Admin
+			}
 		}
 		if strings.HasPrefix(r.URL.Path, prefix) {
+			if len(r.URL.Path) > len(prefix) && r.URL.Path[len(prefix)+1] != '/' {
+				continue
+			}
 			file := path.Join(staticDir, r.URL.Path[len(prefix):])
 			finfo, err := os.Stat(file)
 			if err != nil {