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<template>
<div></div>
</template>
<script setup lang="ts" name="global-websocket">
import { reactive, ref, computed, onMounted, onUnmounted } from 'vue';
import { useUserStore } from '@/store/modules/user';
const emit = defineEmits(['rollback']);
/**
* 定义接收的参数
*/
const props = defineProps({
uri: {
type: String,
},
});
/**
* 定义Socket状态
*/
const state = reactive({
webSocket: ref(), // webSocket实例
lockReconnect: false, // 重连锁,避免多次重连
maxReconnect: 6, // 最大重连次数, -1 标识无限重连
reconnectTime: 0, // 重连尝试次数
heartbeat: {
interval: 30 * 1000, // 心跳间隔时间
timeout: 10 * 1000, // 响应超时时间
pingTimeoutObj: ref(), // 延时发送心跳的定时器
pongTimeoutObj: ref(), // 接收心跳响应的定时器
pingMessage: JSON.stringify({ type: 'ping' }), // 心跳请求信息
},
});
/**
* 获取Token令牌
*/
const token = computed(() => {
return useUserStore().getToken;
});
const tenant = computed(() => {
return Session.getTenant();
});
/**
* 钩子函数
*/
onMounted(() => {
initWebSocket();
});
onUnmounted(() => {
state.webSocket.close();
clearTimeoutObj(state.heartbeat);
});
/**
* 初始化WebSocket对象
*/
const initWebSocket = () => {
// ws地址
let host = window.location.host;
let wsUri = `${location.protocol === 'https:' ? 'wss' : 'ws'}://${host}${props.uri}`;
// 建立连接
state.webSocket = new WebSocket(wsUri);
// 连接成功
state.webSocket.onopen = onOpen;
// 连接错误
state.webSocket.onerror = onError;
// 接收信息
state.webSocket.onmessage = onMessage;
// 连接关闭
state.webSocket.onclose = onClose;
};
/**
* 重连机制
*/
const reconnect = () => {
if (!token.value) {
return;
}
if (
state.lockReconnect ||
(state.maxReconnect !== -1 && state.reconnectTime > state.maxReconnect)
) {
return;
}
state.lockReconnect = true;
setTimeout(() => {
state.reconnectTime++;
// 建立新连接
initWebSocket();
state.lockReconnect = false;
}, 5000);
};
/**
* 清空定时器
*/
const clearTimeoutObj = (heartbeat: any) => {
heartbeat.pingTimeoutObj && clearTimeout(heartbeat.pingTimeoutObj);
heartbeat.pongTimeoutObj && clearTimeout(heartbeat.pongTimeoutObj);
};
/**
* 开启心跳
*/
const startHeartbeat = () => {
const webSocket = state.webSocket;
const heartbeat = state.heartbeat;
// 清空定时器
clearTimeoutObj(heartbeat);
// 延时发送下一次心跳
heartbeat.pingTimeoutObj = setTimeout(() => {
// 如果连接正常
if (webSocket.readyState === 1) {
//这里发送一个心跳,后端收到后,返回一个心跳消息,
webSocket.send(heartbeat.pingMessage);
// 心跳发送后,如果服务器超时未响应则断开,如果响应了会被重置心跳定时器
heartbeat.pongTimeoutObj = setTimeout(() => {
webSocket.close();
}, heartbeat.timeout);
} else {
// 否则重连
reconnect();
}
}, heartbeat.interval);
};
/**
* 连接成功事件
*/
const onOpen = () => {
//开启心跳
startHeartbeat();
state.reconnectTime = 0;
};
/**
* 连接失败事件
* @param e
*/
const onError = () => {
//重连
reconnect();
};
/**
* 连接关闭事件
* @param e
*/
const onClose = () => {
//重连
reconnect();
};
/**
* 接收服务器推送的信息
* @param msgEvent 消息事件
*/
const onMessage = (msgEvent: any) => {
//收到服务器信息,心跳重置并发送
startHeartbeat();
// if (msgEvent.data.indexOf('pong') > 0) {
// return;
// }
// let text =''
// try{
// text = JSON.parse(msgEvent.data);
// }catch(e){
// return
// }
emit('rollback', msgEvent.data);
};
</script>