session中使用session.user提示Cannot read property 'user' of undefined

Question

var express = require('express');
var users = require('../models/users');
var cookieParser = require('cookie-parser');
var session = require('express-session');
var router = express.Router();
var app = express();

app.use(cookieParser());
app.use(session({
  secret: '123AppShop456', // 建议使用 128 个字符的随机字符串
  cookie: {
    maxAge: 60 * 1000
  },
  resave: false,
  saveUninitialized: true
}));

app.use(router)

router.get('/', function (req, res, next) {
  res.send('respond with a resource');
});

router.get('/test', function (req, res, next) {
  res.send('test');
});

router.get('/user', function (req, res, next) {
  console.log(req.session)
  if (req.session.user !== null) {
    res.json({
      status: '0',
      msg: '',
      result: {
        userName: req.session.user
      },
    })
  } else {
    res.json({
      status: '1'
    })
  }
});

router.post("/", function (req, res, next) {
  var param = {
    userName: req.body.userName,
    pwd: req.body.password
  }
  users.findOne(param, function (err, doc) {
    if (!err && !doc) {
      res.json({
        status: '1'
      })
    } else {
      if (doc) {
        req.session.user = doc.userName,
        console.log(doc.userName, req.session.user)
        res.json({
          status: '0',
          msg: '',
          result: {
            userName: doc.userName
          }
        })
      }
    }
  })
});

module.exports = router;

想使用session用作登陆，但是始终提示Cannot read property 'user' of undefined。
目前google到的方法无效，router放后面都不行
不用session的代码正常无报错

Answer 1

下面用的是router，所以session注册点应该是router.use里