const express = require('express')

const app = express()

const mw = function(req, resp, next) {

    console.log("test");

    next()

}

// 注册全局有效的中间件

app.use(mw)

app.get('/', function(req, resp) {

    resp.send("test")

})

app.listen(80, () => {

    console.log('express server running at http://12700.0.1');

})

const express = require('express')

const app = express()

const mw = function(req, resp, next) {

    req.startTime = Date.now()

    next()

}

// 注册全局有效的中间件

app.use(mw)

app.get('/', function(req, resp) {

    resp.send(req.startTime)

})

app.listen(80, () => {

    console.log('express server running at http://12700.0.1');

})

const express = require('express')

const app = express()

// 执行顺序和函数定义顺序无关，和use的先后顺序有关

const myS = function(req, resp, next) {

    console.log("第二个");

    next()

}

const myF = function(req, resp, next) {

    console.log("第一个");

    next()

}

// const myS = function(req, resp, next) {

//     console.log("第二个");

//     next()

// }

// app.use(myS)

app.use(myF)

app.use(myS)

app.get('/', function(req, resp) {

    resp.send("test")

})

app.listen(80, () => {

    console.log('express server running at http://12700.0.1');

})