fix issue

@@ -84,8 +84,9 @@ const handlerError = (err = {}, req, res, next) => {
 };
 
 const getCacheKey = (req, cacheKey = '') => {
+  const isYohoProtocol = _.get(req.app.locals.wap, `webapp.${config.appName}-yoho-protocol`, false);
   const urlObj = url.parse(req.url);
-  const yohoProtocol = req.get('User-Agent').indexOf('yoho-protocol') >= 0 ? 'yoho-protocol' : '';
+  const yohoProtocol = (req.get('User-Agent').indexOf('yoho-protocol') >= 0 && isYohoProtocol) ? 'yoho-protocol' : '';
 
   return md5(cacheKey
     .replace('$url', urlObj.pathname)