zyejMAll-mobile/sheep/hooks/useWebSocket.js
2024-08-07 21:40:27 +08:00

154 lines
4.3 KiB
JavaScript
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

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