add isApp

@@ -21,7 +21,7 @@ module.exports = () => {
         yoho.channel = channel;
 
         // 判断请求是否来自app
-        yoho.isApp = req.query.app_version || req.query.appVersion;
+        yoho.isApp = /yh_blk/i.test(req.get('Referer'));
 
         Object.assign(res.locals, yoho);
         Object.assign(req.yoho, yoho);