服务器代码 ( 依赖于 koa2, koa-websocket )
/* 实例化外部依赖 */
let Koa = require("koa2");
let WebSocket = require("koa-websocket");
/* 实例化 WebSocket, 实例化储存所有上线文数组 并分配监听的端口 */
let app = WebSocket(new Koa());
let ctxs = [];
app.listen(80);
/* 实现简单的接发消息 */
app.ws.use((ctx, next) => {
ctxs.push(ctx);
ctx.websocket.on("message", (message) => {
console.log(message);
for(let i = 0; i < ctxs.length; i++) {
if (ctx == ctxs[i]) continue;
ctxs[i].websocket.send(message);
}
});
});
前端代码 ( 该页面可同时打开多个进行聊天 )
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<input type="text" id="content" />
<input type="button" value="发送" id="send" />
</body>
<script type="text/javascript">
/* 封装 WebSocket 实例化的方法 */
var CreateWebSocket = (function () {
return function (urlValue) {
if(window.WebSocket) return new WebSocket(urlValue);
if(window.MozWebSocket) return new MozWebSocket(urlValue);
return false;
}
})();
/* 实例化 WebSocket 连接对象, 地址为 ws 协议 */
var webSocket = CreateWebSocket("ws://localhost");
/* 接收到服务端的消息时 */
webSocket.onmessage = function (msg) {
console.log("服务端说:" + msg.data);
};
/* 关闭时 */
webSocket.onclose = function () {
console.log("关闭连接");
};
/* 发送消息 */
document.getElementById("send").onclick = function () {
var str = document.getElementById("content").value;
webSocket.send(str);
}
</script>
</html>
时间： 2024-10-23 16:22:49