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							150 lines
						
					
					
						
							4.2 KiB
						
					
					
				
			
		
		
		
			
			
			
				
					
				
				
					
				
			
		
		
	
	
							150 lines
						
					
					
						
							4.2 KiB
						
					
					
				
								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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								import { getRefreshToken } from '@/sheep/request';
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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 options = reactive({
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								    url: (baseUrl + websocketPath).replace('http', 'ws') + '?token=' + getRefreshToken(), // 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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								    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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								  });
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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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								      } else {
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								        // 情况二:连接失败重连
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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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								      complete: () => {},
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								      success: () => {},
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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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