Express中间件中的访问会话对象 [英] Access session object in Express middleware

问题描述

这是我的Express中间件堆栈:

This is my Express middleware stack:

var server = express()
    .use(express.cookieParser())
    .use(express.session({secret: 'Secret'}))
    .use(express.bodyParser())
    .use(function printSession(req, res, next) {
        console.log(req.session.user);
        next();
    })
    .use(express.static('./../'));

这是两条路线:

server.post('/setSession', function (req, res) {
    req.session.user = 'admin';
}

server.post('/getSession', function (req, res) {
    console.log(req.session.user);
}

现在，在路由处理程序中找到会话管理工作.我可以设置session.user，它将保留在同一会话中的后续请求中，这已得到getSession的确认.但是，中间件功能printSession总是打印undefined.

Now the session management in the route handlers work find. I can set session.user and it will persist for the subsequent requests in the same session, as confirmed by getSession. However, the middleware function printSession always prints undefined.

如何访问中间件中填充的session对象?

How can I access the populated session object in the middleware?

推荐答案

该程序运行正常.在我访问/setSession之前，中间件将打印after session: undefined.一旦我获得/setSession，它就会打印after session: admin.只要您要测试的浏览器(而不是curl)存储并发送会话cookie，它就会按预期运行.

This program works fine. Before I access /setSession, the middleware prints after session: undefined. Once I GET /setSession, it prints after session: admin. As long as the browser you are testing with (not curl) stores and sends the session cookies, this will work as expected.

var express = require('express');
var server = express();
server.use(express.cookieParser());
server.use(express.session({secret: 'SEKRET'}));
server.use(function (q,r,n) {console.log('after session:', q.session.user);n();});
server.get('/', function (q,r,n) {r.send("you got slashed");});
server.get('/setSession', function (req, res) {
  console.log("logging admin in via /setSession");
  req.session.user = 'admin';
  res.send("admin logged in");
});
server.listen(3000);

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