Nodejs web服务器之GET、POST请求初次体验

news2025/1/17 4:04:06

一、认识http请求

步骤

1.DNS解析域名，找到ip地址，建立TCP连接，发起http请求
2.服务器接收到http请求，进行处理，返回数据
3.客户端接收到返回的数据，处理数据（比如渲染页面）

二、nodejs处理GET请求

const http = require('http');
const server = http.createServer((req, res) => {
    res.end("Hello node");
});
server.listen(5005, () => {
    console.log('server running at port 5005');
});

浏览器上访问 http://localhost:5005/ 在这里插入图片描述
那么如何看到URL的传参呢？

const http = require('http');
const querystring = require('querystring'); //导入querystring模块
const server = http.createServer((req, res) => {
    const method = req.method; //请求方式
    const url = req.url; //url
     const path = url.split('?')[0] //路径
    console.log('mothod = ', method,',url = ',url);
    req.query = querystring.parse(url.split('?')[1]); //参数
    console.log('query = ', req.query);
    res.end(
        JSON.stringify(req.query) //显示传的参数以json串的形式
    );
});
server.listen(5005, () => {
    console.log('server running at port 5005');
});

运行node，并在浏览器上访问 http://localhost:5005/index.js?name=zs&age=25
在这里插入图片描述

三、处理POST请求

const http = require('http');
const querystring = require('querystring'); //导入querystring模块
const server = http.createServer((req, res) => {
    if (req.method === "POST") {
        let postData = '';
        //流string的方式
        req.on('data', chunk => {
            postData += chunk.toString();
         })
        req.on('end', () => { 
            console.log('postData = ', postData);
            res.end("收到，over");
        })
        console.log("post data header", req.headers);
    }
});
server.listen(5005, () => {
    console.log('server running at port 5005');
});