nodeJs sessionログイン情報を記憶する

var connect = require('connect'),
    users = require('./users');//      require json                       module.exports         JSON         

var server = connect(
    connect.logger('dev'),
    connect.bodyParser(),
    connect.cookieParser(),
    connect.session({secret: 'my app secret'}),//                req.session.logged_in
    function (req, res, next) {
        console.log("1");

        if ('/' == req.url && req.session.logged_in) {
            res.writeHead(200, {'Content-TYpe': 'text/html'});
            res.end('Welcome back,<b>' + req.session.name + '</b>.' + '<a href="/logout">Logout</a> ');
        }
        else {
            next();
        }
    },

    function (req, res, next) {

        console.log("2");
        if (req.url == '/' && 'GET' == req.method) {
            res.writeHead(200, {'Content-TYpe': 'text/html'});
            res.end([ '<form action="/login" method="POST">', '<fieldset>', '<legend>Please Log In</legend>', '<p>User:<input type="text" name="user"></p>', '<p> Password:<input type="password" name="password"></p>', '<button>Submit</button>', '</fieldset>', '<form>' ].join(''));


        }
        else
            next();
    },

    //               
    function (req, res, next) {
        console.log("3");

        if ('/login' == req.url && 'POST' == req.method) {
            res.writeHead(200);
            if (!users[req.body.user] || req.body.password != users[req.body.user].password) {
                res.end('Bad username/password');
            } else {
                req.session.logged_in = true;
                req.session.name = users[req.body.user].name;
                res.end('Authenticated');
            }
        } else {
            next();
        }
    },

    //        
    function (req, res, next) {
        console.log("4");

        if ('/logout' == req.url) {
            req.session.logged_in = false;
            res.writeHead(200);
            res.end('Logged out!');
        } else {
            next();
        }
    }
);

server.listen(3000);

users擬似データは次のとおりです.

{
  "fangchao":{ "password":123456, "name":"fangchao's name" } }