如何使用nodejs和mongodb创建会话ID？

Question

使用nodejs和mongodb。

我正在尝试为每个用户登录时创建会话ID。我在app.js文件上有一个会话，但我想在其他地方创建它或者使用db做一些事情？这是我的app.js文件的代码。另外，我也想访问它，我该怎么做呢？我想要做的一种方法是创建一个sessionid并将其保存在一段时间后过期的数据库中，但这可能会浪费空间和服务器时间。

var express = require('express')


, app = express()
  , db = require('./models/user')
  , pass = require('./config/passport')
  , passport = require('passport')
  , routes = require('./routes')
  , user = require('./routes/user')
  , path = require('path')
  , http = require('http')
  , connect = require('connect')
  //, io = require('socket.io') download "socket.io": "0.9.11"
  , mongoose = require('mongoose');
var mongoConnect = mongoose.connect('mongodb://localhost/test5');
var Session = require('connect-mongo')(connect);
// all environments
app.configure(function(){
    app.set('port', process.env.PORT || 3000);
    app.set('views', __dirname + '/views');
    app.set('view engine', 'jade');
    app.use(express.cookieParser());
    app.use(express.favicon());
    app.use(express.logger('dev'));
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(express.session({ 
        secret: 'settings.cookie_secret',
        store: new Session({
            url: 'mongodb://localhost/test5',
            maxAge: 300000
        })
    }));
    console.log(Session);
    app.use(passport.initialize());
    app.use(passport.session());
    app.use(app.router);
    app.use(express.static(path.join(__dirname, 'public')));    
});

/*var server = require('http').createServer(app)
  , io = io.listen(server);

io.on('connection', function(socket) {
  // sends a message  socket.emit('news', { hello: 'world' });
  socket.on('set nickname', function (name) {
    socket.set('nickname', name, function() {socket.emit('ready');});
    console.log(name);
  });
socket.on('msg', function () {
    socket.get('nickname', function (err, name) {
      console.log('Chat message by ', name);
    });
  });
});

*/
app.get('/', routes.index);
app.get('/register', user.register);
app.post('/register', user.registerPost);
app.get('/registerError', user.registerError);
app.get('/registerThanks', user.registerThanks);
app.get('/login', user.login);
app.post('/login', user.loginPost);
app.get('/loginError', user.loginError);
app.get('/userProfile', user.userProfile);


http.createServer(app).listen(app.get('port'), function(){
  console.log('Express server listening on port ' + app.get('port'));
});