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webSocket前后端交互pc端版

news 2025/8/8 2:59:32

前端代码

<!--* @Author: 第一好帅@宝* @Date: 2023-08-29 16:12:26* @LastEditTime: 2023-08-29 16:54:50* @FilePath: \websocket\ceshi.html
-->
<!DOCTYPE html>
<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Document</title>
</head><body><div class="msg"></div><input type="text"><button>发送</button><button class="bu">关闭连接</button><div class="box"></div><script>let inp = document.querySelector('input')let but = document.querySelector('button')let bu = document.querySelector('.bu')let ws = new WebSocket('ws://localhost:8001')console.log(ws);//初始化连接ws.onopen = function () {document.querySelector('.msg').innerHTML = '<h1>连接成功!</h1>'console.log('连接成功触发函数');ws.send('第一次连接')}//服务器关闭ws.onclose = function (e) {document.querySelector('.msg').innerHTML = '<h1>服务器关闭!</h1>'console.log('服务器关闭');}//连接出错ws.onerror = function (e) {document.querySelector('.msg').innerHTML = '<h1>连接出错了!</h1>'console.log('连接出错了');}//服务器返回数据触发函数ws.onmessage = function (e) {console.log(e.data);document.querySelector('.box').innerHTML = e.data}//向后端发送消息but.addEventListener('click', function () {if (inp.value.trim() != '') {ws.send(inp.value)}})//断开连接bu.addEventListener('click', function () {ws.close()})</script>
</body></html>

后端代码，使用nodejs

npm i nodejs-websocket

/** @Author: 第一好帅@宝* @Date: 2023-08-29 15:52:49* @LastEditTime: 2023-08-29 16:48:17* @FilePath: \node\node.js*/
var ws = require('nodejs-websocket');console.log("开始建立连接...");var server = ws.createServer(function (conn) {conn.on("connect", function (code) {console.log("开启连接" + code);});conn.on("text", function (result) {console.log("收到的信息为:" + result); //由Webtest.html中传来data let a=resultif (result == 1) {a="飞哥" //发送"success"至Webtest.html} else if (result == 2) {a="帆姐" //发送"success"至Webtest.html} else if (result == 3) {a='东哥'}else if(result==4){a="阳哥"}//向前端发送消息conn.sendText('服务器返回数据：'+a);});conn.on("close", function (code) {console.log("关闭连接")});conn.on("error", function (code) {console.log("异常关闭")});
}).listen(8001);console.log("WebSocket连接建立完毕");

运行 node xx.js

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