ajax 第三节 post请求与post服务器响应
====================post.html======================
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>AJAX POST 请求</title>
<style>
#result {
width: 200px;
height: 100px;
border: solid 1px red;
}
</style>
</head>
<body>
<div id="result"></div>
</body>
<script>
const result = document.getElementById("result");
result.addEventListener("mouseover", function () {
const xhr = new XMLHttpRequest();
xhr.open('POST', 'http://127.0.0.1:8000/servers');
xhr.send();
xhr.onreadystatechange = function () {
if (xhr.readyState == 4) {
if (xhr.status >= 200 && xhr.status < 300) {
result.innerText = xhr.response;
}
}
}
})
</script>
</html>
================================== post 服务器响应 ============================================
//引用 express
const { request, response } = require('express');
const express = require('express');
//创建应用对象
const app = express();
//创建路由规则，
// request 是对请求报文的封装
// response 是对响应报文的封装
app.post('/servers', (request, response) => {
response.setHeader('Access-Control-Allow-Origin', '*')
response.send('hello express 0000000')
})
// 监听端口启动服务
app.listen(8000, () => {
console.log('服务已经启动,8000端口监听中.......')
})
=============================================================
