每个请求都表示更改会话 [英] Express change session every request

问题描述

我有一个登录功能

app.post('/doLogin', function(req,res){
        db.users.findOne({username: req.body.username}, function(err, user) {
            if( err ) {
                console.log("Login fail");
            } 
            else if (user != null) {
                if (req.body.password == user.password) {
                    req.session.user_role = "user";
                    req.session.save();
            } else {
                req.session.user_role = "null";
                console.log("Wrong login");
            }
        }
        res.send({redirect: "/"});
    });

});

该函数用于将变量保存到会话中 req.session.user_role = "user";但是当新的请求检查用户是否登录时

This function is used to save a variable into session req.session.user_role = "user"; But when the new request to check user logged in or not

app.get('/', function(req,res){
    redis.get('sess:' + req.session.id, function(err, result){
        console.log("Get session: " + util.inspect(JSON.parse(result),{ showHidden: true, depth: null }));
    });
    if ((req.session.user_role == "user")) {
          console.log("Logged in");
    } else {
        console.log("Logged out");
    }
});

然后返回始终是已注销"，因为会话已更改.我使用Redis存储会话，我认为是Redis的故障，因为当我停止使用Redis时，就可以了请帮帮我！

Then return always is "Logged out", because the session is changed. I use Redis to store session, I think it is Redis fault because when I stop using Redis, it's OK Please help me!

推荐答案

做事最好的方式是始终让 Express 处理它，如果可以的话.

The best way to do things is to always let Express deal with it, if it can.

https://flaviocopes.com/express-sessions/(更新会话教程虽然链接不应被视为答案)

https://flaviocopes.com/express-sessions/ ( Updated Session tutorial although links should not be considered answers )

有一个链接可以向您展示如何在 Express 中为会话设置 redis.在处理会话时，您甚至不必自己查询 redis，这是 node 中的中间件的工作.

There's a link that can show you how to set up redis for sessions in Express. You shouldn't have to even query redis yourself when dealing with sessions, that's a job for middleware in node.

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