如何知道用户是否使用passport.js登录? [英] How to know if user is logged in with passport.js?
问题描述
我一直在阅读 passport.js
信息和样本两天,但我不知道之后,我做了所有的认证过程。
I've been reading passport.js
info and samples for two days, but I'm not sure after that I did all the process of authenticating.
我如何知道我是否登录,例如,我将有一个带有登录或注销按钮的导航栏,是否有一些变量,如下面的代码?
How do I know if I'm logged in, for example, I'll have a navigation bar with a login or logout button, is there some variable like code below?
if (login)
<button>logout</button>
else
<button>login</button>
推荐答案
如果用户登录, passport.js
将为<$ c中的每个请求创建 req
中的用户
对象$ c> express.js ,您可以检查任何中间件的存在:
If user is logged in, passport.js
will create user
object in req
for every request in express.js
, which you can check for existence in any middleware:
if (req.user) {
// logged in
} else {
// not logged in
}
您可以为此创建简单的 express.js
中间件,这将检查用户是否登录,如果没有,将重定向到 / login
页面:
You can create simple express.js
middleware for that, that will check if user is logged in, and if not - will redirect to /login
page:
function loggedIn(req, res, next) {
if (req.user) {
next();
} else {
res.redirect('/login');
}
}
并使用它:
app.get('/orders', loggedIn, function(req, res, next) {
// req.user - will exist
// load user orders and render them
});
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