app.get()调用next出现Can't set headers after they are sent.

Question

具体代码:

checkLogin设置权限，功能能够实现但是一只报错Can't set headers after they are sent.通过打印知道了还是进入到第二哥app.get()里面，求解

Answer 1

express@4中并没有重现该问题，
相同的路由最好合并，如下

app.get('/admin', checkLogin, function (req, res) {
}