js实现websocket

import {UserManager} from "@/utils/userManager.js";

class webSocketClass {
  constructor(url="ws://127.0.0.1:8088/",time=3) {
    this.url = url
    this.filterMessagesList =  [""];  //服务端返回的内容 message事件不监听的内容,不会再message返回
    this.data = null
    this.heartbeatCheckData = {}  //心跳发送的内容
    this.isCreate = false // WebSocket 是否创建成功
    this.isConnect = false // 是否已经连接
    this.isInitiative = false // 是否主动断开
    this.timeoutNumber = time // 心跳检测间隔
    this.heartbeatTimer = null // 心跳检测定时器
    this.reconnectTimer = null // 断线重连定时器
    this.socketExamples = null // websocket实例
    this.againTime = 3 // 重连等待时间(单位秒)
  }

  // 初始化websocket连接
  initSocket(gameId) {
    const _this = this
    this.socketExamples = uni.connectSocket({
      url: `${_this.url}?gameId=${gameId}&$userId=${UserManager.shared().userInfo.userId}`,
      header: {
        'content-type': 'application/json',
         token: UserManager.shared().userInfo ? UserManager.shared().userInfo.token : ''
      },
      success: (res) => {
        _this.isCreate = true
        console.log(res)
      },
      fail: (rej) => {
        console.error(rej)
        _this.isCreate = false
      }
    })
    this.createSocket()
  }

  // 创建websocket连接
  createSocket() {
    var _this = this
    if (this.isCreate) {
      console.log('WebSocket 开始初始化')
      // 监听 WebSocket 连接打开事件
      try {
        this.socketExamples.onOpen(() => {
          console.log('WebSocket 连接成功')
          this.isConnect = true
          clearInterval(this.heartbeatTimer)
          clearTimeout(this.reconnectTimer)
          // 打开心跳检测
          this.heartbeatCheck()
        })
        // 监听 WebSocket 接受到服务器的消息事件
        this.socketExamples.onMessage((res) => {
          console.log('收到消息---',res.data)
          if (_this.filterMessagesList.includes(res.data)) {
                     console.log(`信息:${res.data}--在过滤列表中不进行推送`)
          }else{
                     uni.$emit('message', res)
          }
        })
        // 监听 WebSocket 连接关闭事件
        this.socketExamples.onClose(() => {
          console.log('WebSocket 关闭了')
          this.isConnect = false
          this.reconnect()
        })
        // 监听 WebSocket 错误事件
        this.socketExamples.onError((res) => {
          console.log('WebSocket 出错了')
          console.log(res)
          this.isInitiative = false
        })
      } catch (error) {
        console.warn(error)
      }
    } else {
      console.warn('WebSocket 初始化失败!')
    }
  }

  //判断是否为{}
  isEmptyObject(value) {
  return typeof value === 'object' && Object.keys(value).length === 0;
}

  // 发送消息
  sendMsg(value) {
    if (!this.isEmptyObject(value)){
          value["userId"] =  UserManager.shared().userInfo ? UserManager.shared().userInfo.userId : ''
    }
     const param = JSON.stringify(value)
    return new Promise((resolve, reject) => {
      this.socketExamples.send({
        data: param,
        success() {
          console.log('消息发送成功')
          resolve(true)
        },
        fail(error) {
          console.log('消息发送失败')
          reject(error)
        }
      })
    })
  }

  // 开启心跳检测
  heartbeatCheck() {
    var _this = this
    console.log('开启心跳')
    this.heartbeatTimer = setInterval(() => {
      _this.sendMsg(_this.heartbeatCheckData)
    }, _this.timeoutNumber * 1000)
  }

  // 重新连接
  reconnect() {
    // 停止发送心跳
    clearTimeout(this.reconnectTimer)
    clearInterval(this.heartbeatTimer)
    // 如果不是人为关闭的话，进行重连
    if (!this.isInitiative) {
      this.reconnectTimer = setTimeout(() => {
        this.initSocket()
      }, this.againTime * 1000)
    }
  }

  // 关闭 WebSocket 连接
  closeSocket(reason = '关闭') {
    const _this = this
    this.socketExamples.close({
      reason,
      success() {
        _this.data = null
        _this.isCreate = false
        _this.isConnect = false
        _this.isInitiative = true
        _this.socketExamples = null
        clearInterval(_this.heartbeatTimer)
        clearTimeout(_this.reconnectTimer)
        console.log('关闭 WebSocket 成功')
      },
      fail(error) {
        console.log('关闭 WebSocket 失败',error)
      }
    })
  }
}
export {webSocketClass}