import { message } from 'ant-design-vue'
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import ReconnectingWebSocket from 'reconnecting-websocket'
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import { ELocalStorageKey } from '../types'
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interface WebSocketOptions {
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data: any
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cache?: boolean | string
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destroyCache?: string
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}
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export interface MessageHandler {
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(data : {[key: string]: any}): void
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}
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/**
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* ConnectWebSocket 类
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* TODO: 优化messageHandler: EventEmitter。暂时传入回调函数
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*/
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class ConnectWebSocket {
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_url: string
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_socket: ReconnectingWebSocket | null
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_hasInit: boolean
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_messageHandler: MessageHandler | null
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constructor (url: string) {
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this._url = url
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this._socket = null
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this._hasInit = false
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this._messageHandler = null
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}
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initSocket () {
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if (this._hasInit) {
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return
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}
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if (!this._url) {
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return
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}
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// 会自动重连，无需处理重连逻辑
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this._socket = new ReconnectingWebSocket(this._url, [], {
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maxReconnectionDelay: 20000, // 断开后最大的重连时间： 20s，每多一次重连，会增加 1.3 倍，5 * 1.3 * 1.3 * 1.3...
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minReconnectionDelay: 5000, // 断开后最短的重连时间： 5s
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maxRetries: 5,
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})
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this._hasInit = true
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this._socket.addEventListener('open', this._onOpen.bind(this))
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this._socket.addEventListener('close', this._onClose.bind(this))
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this._socket.addEventListener('error', this._onError.bind(this))
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this._socket.addEventListener('message', this._onMessage.bind(this))
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}
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_onOpen () {
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console.log('连接成功')
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}
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_onClose () {
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console.log('连接已断开')
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}
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_onError () {
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console.log('连接 error')
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}
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registerMessageHandler (messageHandler: MessageHandler) {
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this._messageHandler = messageHandler
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}
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_onMessage (msg: MessageEvent) {
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const data = JSON.parse(msg.data)
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this._messageHandler && this._messageHandler(data)
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console.log('接受消息', msg)
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}
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sendMessage = (message: WebSocketOptions): void => {
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this._socket?.send(JSON.stringify(message.data))
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}
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close () {
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this._socket?.close()
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}
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}
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export default ConnectWebSocket
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