网站做优化有用吗/seo管理系统培训

websocket作为不同于http的数据传输方式，是开发一些实时系统的不二选择。

最近在研究开发websocket方面的小程序。小程序客户端直接对websocket做了封装。自己只要写后端就可以了。我拿来测试的后端代码如下，本地环境下小程序可以成功运行。

let websocket = require("websocket");
let http = require("http");
const WebSocketServer = websocket.server;// 创建一个http Server
let httpServer = http.createServer((request, response) => {console.log("received a request");response.writeHead(404);response.end();
});// 创建一个websocket Server，websocket Server需要建立在http server之上
let wsServer = new WebSocketServer({httpServer: httpServer,autoAcceptConnections: true
});/*** 广播所有客户端消息* @param  {String} type     广播方式(admin为系统消息，user为用户消息)* @param  {String} message  消息* @param  {String} nickname 用户昵称，广播方式为admin时可以不存在*/
function broadcastSend(type, message, nickname) {clients.forEach(function(v, i) {if (v.ws.readyState === ws.OPEN) {v.ws.send(JSON.stringify({"type": type,"nickname": nickname,"message": message}));}})
}
// 事件监听
wsServer.on("connect", (connection) => {let clients = [];clients.push({ws: connection,name: 1})console.log(">>>come from: " + connection.remoteAddress); // 显示连接客户端的ip地址connection.on("message", (message) => {console.log(message.type);console.log(">>>message: ", message); // 接收到信息的类型和内容，注意都是utf8编码connection.sendUTF(message.utf8Data + '我是websocket'); // 把接收到的信息发回去clients.forEach((v, i) => {if (v.ws.readyState === connection.OPEN) {v.ws.send(JSON.stringify({"type": 1,"nickname": 2,"message": 3}));}})});connection.on("close", (reasonCode, description) => {console.log(connection.remoteAddress + " has disconnected.");});
});// 启动服务器
httpServer.listen(8082, () => {console.log(">>>Http Server is listening on port 8082!");
});