Express.js req.session在路由中是未定义的

我从头开始创buildExpress应用程序，并添加cookieParser，session和csrf中间件

/** * Module dependencies. */ var express = require('express'); var routes = require('./routes'); var user = require('./routes/user'); var http = require('http'); var path = require('path'); var app = express(); // all environments app.use(express.cookieParser()); app.use(express.session({secret: "lalala" })); app.use(express.csrf()); app.set('port', process.env.PORT || 3000); app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'jade'); app.use(express.favicon()); app.use(express.logger('dev')); app.use(express.json()); app.use(express.urlencoded()); app.use(express.methodOverride()); app.use(app.router); app.use(express.static(path.join(__dirname, 'public'))); // development only if ('development' == app.get('env')) { app.use(express.errorHandler()); } app.get('/', routes.index); app.get('/users', user.list); http.createServer(app).listen(80, function(){ console.log('Express server listening on port ' + app.get('port')); }); 

然后在索引路由器中，我尝试访问会话

 exports.index = function(req, res){ res.cookie('u','1'); console.log(res.session); res.render('index', { title: 'Express' }); }; 

但不幸的是它总是不确定的！ 为什么？

Answer 1

您正在寻找响应（ res ）而不是请求（ req ）。 console.log(req.session)应该可以工作。 容易犯错。