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import { Notification } from "element-ui";
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let hasShownNotification = false;
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// WebSocket连接实例
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let socket = null;
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// 是否正在尝试重连
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let lockReconnect = false;
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// 心跳间隔，20秒
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const timeout = 20 * 1000;
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// 心跳定时器
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let timeoutObj = null;
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// 服务器无响应超时定时器
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let serverTimeoutObj = null;
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// 重连定时器
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let reconnectTimeout = null;
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// 初始化WebSocket连接
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const initWebSocket = () => {
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if ("WebSocket" in window) {
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const protocol = window.location.protocol === "https:" ? "wss://" : "ws://";
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const wsPath = "/cac-api/websocket";
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const wshost =
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window.location.hostname === "localhost"
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? "192.168.1.190:88"
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: window.location.host;
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const wsUrl = protocol + wshost + wsPath;
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socket = new WebSocket(wsUrl);
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socket.onerror = webSocketOnError;
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socket.onmessage = webSocketOnMessage;
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socket.onclose = closeWebsocket;
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socket.onopen = openWebsocket;
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} else {
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// 浏览器不支持WebSocket
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console.error("您的浏览器不支持WebSocket");
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// 这里可以添加更友好的提示方式，如使用Element UI的Notification
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}
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};
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// 打开WebSocket连接时执行
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const openWebsocket = () => {
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console.log("WebSocket链接成功");
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startHeartbeat();
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};
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// 启动心跳
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const startHeartbeat = () => {
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timeoutObj = setTimeout(() => {
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if (socket.readyState === WebSocket.OPEN) {
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socket.send("1"); // 发送心跳消息
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console.log("发送心跳消息以保持WebSocket连接活跃");
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// 如果需要，可以在这里添加检测服务器响应的逻辑
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// 例如，设置一个服务器响应超时检测
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// 递归调用以继续发送心跳
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startHeartbeat();
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} else {
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// 如果WebSocket已经关闭，则不再发送心跳
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console.log("WebSocket连接已关闭，停止发送心跳");
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clearTimeout(timeoutObj); // 清除定时器
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}
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}, timeout);
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};
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// WebSocket错误处理
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const webSocketOnError = (e) => {
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console.error("WebSocket发生错误:", e);
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// 这里通常不需要立即重连，因为onclose会处理重连逻辑
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};
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// 处理接收到的消息
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const webSocketOnMessage = (e) => {
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// 自定义事件，将接收到的数据派发给其他监听器
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window.dispatchEvent(
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new CustomEvent("onmessageWS", { detail: { data: e.data } })
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);
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// 收到消息后重置心跳定时器
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resetHeartbeat();
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};
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// WebSocket关闭处理
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const closeWebsocket = (e) => {
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console.log("WebSocket连接已关闭:", e);
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if (!hasShownNotification) {
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Notification({
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title: "告警",
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message: "WebSocket连接已关闭",
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position: "bottom-right",
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type: "warning",
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duration: 2000,
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});
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hasShownNotification = true; // 更新状态，防止再次显示
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}
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// 清除所有定时器
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clearTimeout(timeoutObj);
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clearTimeout(serverTimeoutObj);
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// 设置重连定时器
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reconnectTimeout = setTimeout(() => {
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initWebSocket();
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}, 60 * 1000); // 60秒后重连
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};
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// 重置心跳定时器
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const resetHeartbeat = () => {
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clearTimeout(timeoutObj);
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clearTimeout(serverTimeoutObj);
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startHeartbeat();
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};
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// 发送消息到WebSocket服务器
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const sendWebsocket = (data) => {
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if (socket && socket.readyState === WebSocket.OPEN) {
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socket.send(data);
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} else {
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console.error("WebSocket未连接，无法发送消息");
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}
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};
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// 关闭WebSocket连接（通常不需要在前端主动调用，除非有特定需求）
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const close = () => {
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if (socket) {
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socket.close();
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}
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};
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// 导出相关函数，以便在其他地方使用
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export default { initWebSocket, sendWebsocket, close };
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// 注意：关于离开页面不断开WebSocket连接的需求，这通常取决于浏览器的行为。
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// 在一些情况下，浏览器会在页面卸载时自动关闭WebSocket连接。
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fanluyan
12 months ago