2024-08-07 10:31:42 +08:00
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import { onBeforeUnmount, reactive, ref } from 'vue';
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import { baseUrl, websocketPath } from '@/sheep/config';
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import { copyValueToTarget } from '@/sheep/util';
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/**
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* WebSocket 创建 hook
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* @param opt 连接配置
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* @return {{options: *}}
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*/
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export function useWebSocket(opt) {
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const getAccessToken = () => {
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return uni.getStorageSync('token');
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};
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const options = reactive({
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url: (baseUrl + websocketPath).replace('http', 'ws') + '?token=' + getAccessToken(), // ws 地址
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isReconnecting: false, // 正在重新连接
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reconnectInterval: 3000, // 重连间隔,单位毫秒
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heartBeatInterval: 5000, // 心跳间隔,单位毫秒
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pingTimeoutDuration: 1000, // 超过这个时间,后端没有返回pong,则判定后端断线了。
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heartBeatTimer: null, // 心跳计时器
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destroy: false, // 是否销毁
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pingTimeout: null, // 心跳检测定时器
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reconnectTimeout: null, // 重连定时器ID的属性
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2024-08-07 21:40:27 +08:00
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onConnected: () => {}, // 连接成功时触发
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onClosed: () => {}, // 连接关闭时触发
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onMessage: (data) => {}, // 收到消息
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2024-08-07 10:31:42 +08:00
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});
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const SocketTask = ref(null); // SocketTask 由 uni.connectSocket() 接口创建
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const initEventListeners = () => {
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// 监听 WebSocket 连接打开事件
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SocketTask.value.onOpen(() => {
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console.log('WebSocket 连接成功');
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// 连接成功时触发
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options.onConnected();
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// 开启心跳检查
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startHeartBeat();
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});
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// 监听 WebSocket 接受到服务器的消息事件
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SocketTask.value.onMessage((res) => {
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try {
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if (res.data === 'pong') {
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// 收到心跳重置心跳超时检查
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resetPingTimeout();
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} else {
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options.onMessage(JSON.parse(res.data));
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}
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} catch (error) {
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console.error(error);
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}
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});
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// 监听 WebSocket 连接关闭事件
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SocketTask.value.onClose((event) => {
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// 情况一:实例销毁
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if (options.destroy) {
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options.onClosed();
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2024-08-07 21:40:27 +08:00
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} else {
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// 情况二:连接失败重连
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2024-08-07 10:31:42 +08:00
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// 停止心跳检查
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stopHeartBeat();
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// 重连
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reconnect();
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}
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});
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};
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// 发送消息
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const sendMessage = (message) => {
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if (SocketTask.value && !options.destroy) {
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SocketTask.value.send({ data: message });
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}
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};
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// 开始心跳检查
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const startHeartBeat = () => {
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options.heartBeatTimer = setInterval(() => {
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sendMessage('ping');
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options.pingTimeout = setTimeout(() => {
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// 如果在超时时间内没有收到 pong,则认为连接断开
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reconnect();
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}, options.pingTimeoutDuration);
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}, options.heartBeatInterval);
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};
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// 停止心跳检查
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const stopHeartBeat = () => {
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clearInterval(options.heartBeatTimer);
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resetPingTimeout();
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};
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// WebSocket 重连
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const reconnect = () => {
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if (options.destroy || !SocketTask.value) {
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// 如果WebSocket已被销毁或尚未完全关闭,不进行重连
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return;
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}
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// 重连中
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options.isReconnecting = true;
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// 清除现有的重连标志,以避免多次重连
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if (options.reconnectTimeout) {
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clearTimeout(options.reconnectTimeout);
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}
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// 设置重连延迟
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options.reconnectTimeout = setTimeout(() => {
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// 检查组件是否仍在运行和WebSocket是否关闭
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if (!options.destroy) {
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// 重置重连标志
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options.isReconnecting = false;
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// 初始化新的WebSocket连接
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initSocket();
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}
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}, options.reconnectInterval);
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};
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const resetPingTimeout = () => {
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if (options.pingTimeout) {
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clearTimeout(options.pingTimeout);
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options.pingTimeout = null; // 清除超时ID
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}
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};
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const close = () => {
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options.destroy = true;
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stopHeartBeat();
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if (options.reconnectTimeout) {
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clearTimeout(options.reconnectTimeout);
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}
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if (SocketTask.value) {
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SocketTask.value.close();
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SocketTask.value = null;
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}
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};
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const initSocket = () => {
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options.destroy = false;
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copyValueToTarget(options, opt);
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SocketTask.value = uni.connectSocket({
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url: options.url,
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2024-08-07 21:40:27 +08:00
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complete: () => {},
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success: () => {},
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2024-08-07 10:31:42 +08:00
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});
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initEventListeners();
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};
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initSocket();
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onBeforeUnmount(() => {
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close();
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});
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return { options };
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}
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