fix when one route mulit path

@@ -21,6 +21,11 @@ module.exports = () => {
         function onRender() {
             let route = req.route ? req.route.path : '';
             let appPath = req.app.mountpath;
+
+            if (_.isArray(route) && route.length > 0) {
+                route = route[0];
+            }
+
             let key = urlJoin(appPath, route.toString()); // route may be a regexp
 
             req.app.set('etag', false);