鸿蒙 WebSocket 的使用竟如此简单

import { webSocket } from '@kit.NetworkKit';import { BusinessError } from '@kit.BasicServicesKit';
let defaultIpAddress = "ws://";let ws = webSocket.createWebSocket();ws.on('open', (err: BusinessError, value: Object) => {  console.log("on open, status:" + JSON.stringify(value));  // 当收到on('open')事件时，可以通过send()方法与服务器进行通信  ws.send("Hello, server!", (err: BusinessError, value: boolean) => {    if (!err) {      console.log("Message send successfully");    } else {      console.log("Failed to send the message. Err:" + JSON.stringify(err));    }  });});ws.on('message', (err: BusinessError, value: string | ArrayBuffer) => {  console.log("on message, message:" + value);  // 当收到服务器的`bye`消息时（此消息字段仅为示意，具体字段需要与服务器协商），主动断开连接  if (value === 'bye') {    ws.close((err: BusinessError, value: boolean) => {      if (!err) {        console.log("Connection closed successfully");      } else {        console.log("Failed to close the connection. Err: " + JSON.stringify(err));      }    });  }});ws.on('close', (err: BusinessError, value: webSocket.CloseResult) => {  console.log("on close, code is " + value.code + ", reason is " + value.reason);});ws.on('error', (err: BusinessError) => {  console.log("on error, error:" + JSON.stringify(err));});ws.connect(defaultIpAddress, (err: BusinessError, value: boolean) => {  if (!err) {    console.log("Connected successfully");  } else {    console.log("Connection failed. Err:" + JSON.stringify(err));  }});