1. 安裝node.js
官網: https://nodejs.org/en/
2.開啟cmd輸入
6.打開網頁檔 html,開兩份(一左一右)
7.測試檔案在textbox輸入資料(123)
8.在下方console輸入 ws.send("hi")
9.畫面回應
npm install express npm install ws npm install mysql3.創建server.js
//import express 和 ws 套件 const express = require('express') const SocketServer = require('ws').Server //指定開啟的 port const PORT = 3000 //創建 express 的物件,並綁定及監聽 3000 port ,且設定開啟後在 console 中提示 const server = express() .listen(PORT, () => console.log(`Listening on ${PORT}`)) //將 express 交給 SocketServer 開啟 WebSocket 的服務 const wss = new SocketServer({ server }) //當 WebSocket 從外部連結時執行 wss.on('connection', ws => { console.log('Client connected') ws.on('message', data => { //取得所有連接中的 client let clients = wss.clients //做迴圈,發送訊息至每個 client clients.forEach(client => { client.send(data) }) }) ws.on('close', () => { console.log('Close connected') }) })4.創建連線網頁檔(text.html)
<html> <body> <script src="https://code.jquery.com/jquery-3.5.1.min.js"></script> <script> $(document).ready(function(){ $('#txtInput').keypress(function(e) { var key = window.event ? e.keyCode : e.which; if (key == 13) $('#btnSend').click(); }); $("#btnSend").on("click",function(){ let txt = $("#txtInput").val(); $("#txtInput").val(""); ws.send(txt); }) }) //使用 WebSocket 的網址向 Server 開啟連結 var ws = new WebSocket('ws://localhost:3000') ws.onopen = () => { console.log('open connection') } ws.onclose = () => { console.log('close connection'); } //接收 Server 發送的訊息 ws.onmessage = event => { console.log(event); if(!$("#txtShow").val()) $("#txtShow").val(event.data); else $("#txtShow").val($("#txtShow").val()+"n"+event.data); } </script> <textarea id="txtShow" style="height:60vmin;width:80vmin" disabled></textarea></br> <input id="txtInput" style="width:80vmin" type="text"><input type="button" id="btnSend" value="送出"> </body> </html>5.開啟cmd到資料夾目錄輸入
Node server.js
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Course Features
- Lectures 0
- Quizzes 0
- Duration 50 hours
- Skill level All levels
- Language English
- Students 0
- Assessments Yes