redis session 有误时提示

@@ -66,8 +66,13 @@ app.use(session({
     secret: config.sessionSecret
     secret: config.sessionSecret
 }));
 }));
 
 
-// app 访问校验参数是否合法
+// 前置中间件
 app.use(function(req, res, next) {
 app.use(function(req, res, next) {
+    if (!req.session) {
+        console.error('redis-session 配置有误');
+    }
+
+    // app 访问校验参数是否合法
     if (req.query.app_version || (req.query.openrefer === 'app' && req.query.uid)) {
     if (req.query.app_version || (req.query.openrefer === 'app' && req.query.uid)) {
         if (sign.checkSign(req.query) || sign.webSign(req.query)) {
         if (sign.checkSign(req.query) || sign.webSign(req.query)) {
             req.isApp = true;
             req.isApp = true;