cache ios and android

@@ -85,12 +85,13 @@ 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 isIos = req.yoho.isiOS;
   const yohoProtocol = (req.get('User-Agent').indexOf('yoho-protocol') >= 0 && isYohoProtocol) ? 'yoho-protocol' : '';
 
   return md5(cacheKey
     .replace('$url', urlObj.pathname)
     .replace('$params', urlObj.query || '')
-    .replace('$yoho-protocol', yohoProtocol));
+    .replace('$yoho-protocol', yohoProtocol) + (isIos ? 'ios' : 'android'));
 };
 
 const render = (route) => {