node.js - express 跨页面session为空

问题描述

问 题

1. 导入cookieParser()、session中间件

router.use(cookieParser()); 
router.use(session({
    saveUninitialized: false, // don't create session until something stored
    resave: false, // don't save session if unmodified
    cookie: { maxAge: 36288000 },
    secret: 'RHjk2017'
}));

1. 登录操作

 router.post('/login.html', function(req, res, next){
    var password = req.body.password; 
    var username = req.body.username;
    password = md5.update(password).digest('hex');
    var users = new Users();
    users.checklogin(username, password, function(err, result){
        if (err) {
            res.setHeader('Content-Type', 'text/html;charset=UTf-8');
            res.end('登录错误，请重试！');
        } else {
            req.session.username = result[0].name;
            req.session.save();
            // console.log(req.session.username); // **这里打印session是有的**
            res.redirect('/admin/');
        }
    });
});

1. 网站首页

router.use(cookieParser()); 
router.use(session({
    resave: false, // don't save session if unmodified
    cookie: { maxAge: 60*60*24*7 }, 
    saveUninitialized: false, // don't create session until something stored
    secret: 'RHjk2017'
}));
router.use(function(req, res, next){
    console.log(req.session.username); // session为空
});

登陆后记录session，跳转后session为空，求解决方案

解决方案

router.use(cookieParser()); 
router.use(session({
    resave: false, // don't save session if unmodified
    cookie: { maxAge: 60*60*24*7 }, 
    saveUninitialized: false, // don't create session until something stored
    secret: 'RHjk2017'
}));

网站首页就不再需要上面的代码了。

现在等于又重新定义了，导致 req.session.username 为空了。

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