http://localhost:9000/api/user/login 已经在这个路由设置了cookie

1.路由

    //1. 这是登录接口 
    if (method === 'GET' && req.path === '/api/user/login') {
      
        const { username, password } = req.query
        const result = login(username, password)

        return result.then(data => {
            if (data.username) {
                
                // 登录成功设置session
                req.session.username = data.username
                req.session.realname = data.realname

                console.log('show session:', req.session);

                return new SuccessModel()
            } else {
                return new ErrorModel('账号密码错误')
            }
        })
    }
    // 登录测试
    if (method === 'GET' && req.path === '/api/user/login-test') {
        console.log("test req.session", req.session);
        if (req.session.username) {
            return Promise.resolve( new SuccessModel({
                session:req.session
            }))
        } 
        return Promise.resolve(new ErrorModel('尚未登录'))
    } 

2.app.js

    let needSetCookie = false
    let userId = req.cookie.userid
    if (userId) {
        if (!SESSION_DATA[userId]) {
            SESSION_DATA[userId] = {}
        }
    } else {
        needSetCookie = true
        userId = `${Date.now()}_${Math.random()}`
        SESSION_DATA[userId] = {}
    }
    req.session = SESSION_DATA[userId]