---

一、安装

npm

npm install websocket --save-dev

pnpm

pnpm install websocket --save-dev

---

二、封装

在 /src/utils 文件夹下创建 websocket.ts 文件，并放入如下代码

import { onUnmounted } from 'vue'

//设置
interface SocketOptions {
  //心跳间隔
  heartbeatInterval?: number
  //超时重传
  reconnectInterval?: number
  //最大重传次数
  maxReconnectAttempts?: number
}

class Socket {
  //路径
  url: string
  ws: WebSocket | null = null
  opts: SocketOptions
  //重传次数
  reconnectAttempts: number = 0
  listeners: { [key: string]: Function[] } = {}
  //心跳间隔
  heartbeatInterval: number | null = null
  //构造函数
  constructor(url: string, opts: SocketOptions = {}) {
    this.url = url
    this.opts = {
      //心跳间隔
      heartbeatInterval: 30000,
      //超时重传
      reconnectInterval: 5000,
      //最大重传次数
      maxReconnectAttempts: 5,
      ...opts
    }

    this.init()
  }
  //初始化
  init() {
    this.ws = new WebSocket(this.url)
    this.ws.onopen = this.onOpen.bind(this)
    this.ws.onmessage = this.onMessage.bind(this)
    this.ws.onerror = this.onError.bind(this)
    this.ws.onclose = this.onClose.bind(this)
  }
  //打开
  onOpen(event: Event) {
    console.log('WebSocket opened:', event)
    this.reconnectAttempts = 0
    this.startHeartbeat()
    this.emit('open', event)
  }
  //收到的WebSocket消息
  onMessage(event: MessageEvent) {
    // console.log('WebSocket message received:', event.data);
    this.emit('message', event.data)
  }
  //错误
  onError(event: Event) {
    console.error('WebSocket error:', event)
    this.emit('error', event)
  }
  //重连逻辑中，在连接失败后自动重新连接
  onClose(event: CloseEvent) {
    console.log('WebSocket closed:', event)
    this.stopHeartbeat()
    this.emit('close', event)
    //重连逻辑中，在连接失败后自动重新连接，但会限制重连的次数和每次重连之间的间隔时间
    if (this.opts.maxReconnectAttempts !== 0 && this.reconnectAttempts < this.opts.maxReconnectAttempts!) {
      setTimeout(() => {
        // console.log("我有错误了1111111111111111111111111111111111111");
        this.reconnectAttempts++
        this.init()
      }, this.opts.reconnectInterval)
    }
  }
  //开始心跳检测
  startHeartbeat() {
    if (!this.opts.heartbeatInterval) return

    this.heartbeatInterval = window.setInterval(() => {
      if (this.ws?.readyState === WebSocket.OPEN) {
        this.ws.send('ping')
      }
    }, this.opts.heartbeatInterval)
  }
  //停止心跳检测
  stopHeartbeat() {
    if (this.heartbeatInterval) {
      clearInterval(this.heartbeatInterval)
      this.heartbeatInterval = null
    }
  }
  //发送消息
  send(data: string) {
    if (this.ws?.readyState === WebSocket.OPEN) {
      this.ws.send(data)
    } else {
      console.error('WebSocket is not open. Cannot send:', data)
    }
  }
  //事件监听器注册功能的实现
  on(event: string, callback: Function) {
    if (!this.listeners[event]) {
      this.listeners[event] = []
    }
    this.listeners[event].push(callback)
  }
  //从事件监听器中移除
  off(event: string) {
    if (this.listeners[event]) {
      delete this.listeners[event]
    }
  }
  //在事件监听器中触发一个指定的事件
  emit(event: string, data: any) {
    this.listeners[event]?.forEach(callback => callback(data))
  }
}

export function useSocket(url: string, opts?: SocketOptions) {
  const socket = new Socket(url, opts)

  onUnmounted(() => {
    socket.off('open')
    socket.off('message')
    socket.off('error')
    socket.off('close')
    socket.ws?.close() // 关闭WebSocket连接
  })

  return {
    socket,
    send: socket.send.bind(socket),
    on: socket.on.bind(socket),
    off: socket.off.bind(socket)
  }
}

---

三、请求地址配置

3.1 将接口地址放到 public

3.2 引入 ipconfig.js 文件

3.3 全局类型声明

declare global {
  /**
   * Window 的类型提示
   */
  interface Window {
    __APP_INFO__: __APP_INFO__
    global_config: { wsURL: string }
  }
}

---

四、页面使用

4.1 引用

import { useSocket } from '@/utils/websocket'

4.2 注册

// 注意：此处 useSocket() 中用的就是我们配置的全局地址
// 开发结束，打包给后端，后端同时可以自行修改 ipconfig.js 文件中 websokect 地址，这样部署上线之后 websokect 也能正常运行
const { socket, on } = useSocket((window as any).global_config.wsURL)

on('close', () => console.log('Socket closed!'))
//webSocket连接上服务器时
on('open', (event: any) => {
  console.log('webSocket连接上服务器时', event)
})
socket.on('message', (data: any) => {
  if (data) {
   // TODO: 此处拿到后端推送过来的数据，进行你后续的数据渲染逻辑
   console.log(JSON.parse(data))
  }
})

---

五、说明