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websocket服务端与客户端代码示例
source link: https://blog.p2hp.com/archives/10922
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websocket服务端与客户端代码示例. ( json socket )
用到了ws库.
步骤:1安装ws
npm install ws
步骤2:服务端代码:
创建websocket.mjs文件,写入以下代码:
import { WebSocketServer } from "ws";
const server = new WebSocketServer({ port: 3000 });
server.on("connection", (socket) => {
// send a message to the client
socket.send(JSON.stringify({
type: "hello from server",
content: [ 1, "2" ]
// receive a message from the client
socket.on("message", (data) => {
const packet = JSON.parse(data);
switch (packet.type) {
case "hello from client":
console.log(packet.content)
// ...
break;
import { WebSocketServer } from "ws"; const server = new WebSocketServer({ port: 3000 }); server.on("connection", (socket) => { // send a message to the client socket.send(JSON.stringify({ type: "hello from server", content: [ 1, "2" ] })); // receive a message from the client socket.on("message", (data) => { const packet = JSON.parse(data); switch (packet.type) { case "hello from client": console.log(packet.content) // ... break; } }); });
运行服务端代码:
步骤3:编写客户端代码:
在目录中创建index.html
写入以下代码:
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>HTML文档</title>
<meta name="keywords" content="">
<meta name="description" content="">
</head>
<body>
<script>
const socket = new WebSocket("ws://localhost:3000");
socket.addEventListener("open", () => {
// send a message to the server
socket.send(JSON.stringify({
type: "hello from client",
content: [ 3, "4" ]
// receive a message from the server
socket.addEventListener("message", ({ data }) => {
const packet = JSON.parse(data);
switch (packet.type) {
case "hello from server":
console.log(packet.content)
// ...
break;
</script>
</body>
</html>
<!doctype html> <html> <head> <meta charset="utf-8"> <title>HTML文档</title> <meta name="keywords" content=""> <meta name="description" content=""> </head> <body> <script> const socket = new WebSocket("ws://localhost:3000"); socket.addEventListener("open", () => { // send a message to the server socket.send(JSON.stringify({ type: "hello from client", content: [ 3, "4" ] })); }); // receive a message from the server socket.addEventListener("message", ({ data }) => { const packet = JSON.parse(data); switch (packet.type) { case "hello from server": console.log(packet.content) // ... break; } }); </script> </body> </html>
用浏览器打开index.html
按f12查看console输出即可.
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