实时在线用户功能

Yi.Vue3.X.RuoYi/src/utils/signalR.js

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+// 官方文档：https://docs.microsoft.com/zh-cn/aspnet/core/signalr/javascript-client?view=aspnetcore-6.0&viewFallbackFrom=aspnetcore-2.2&tabs=visual-studio
+import * as signalR from '@microsoft/signalr'
+import useSocketStore from '@/store/modules/socket'
+import { getToken } from '@/utils/auth'
+
+
+export default {
+  // signalR对象
+  SR: {},
+  // 失败连接重试次数
+  failNum: 4,
+  baseUrl: '',
+  init(url) {
+    const connection = new signalR.HubConnectionBuilder()
+      .withUrl(url, { accessTokenFactory: () => getToken() })
+      .withAutomaticReconnect()//自动重新连接
+      .configureLogging(signalR.LogLevel.Information)
+      .build();
+    this.SR = connection;
+    // 断线重连
+    connection.onclose(async () => {
+      console.log('断开连接了')
+      console.assert(connection.state === signalR.HubConnectionState.Disconnected);
+      // 建议用户重新刷新浏览器
+      await this.start();
+    })
+
+    connection.onreconnected(() => {
+      console.log('断线重新连接成功')
+    })
+    this.receiveMsg(connection);
+    // 启动
+    // this.start();
+  },
+  /**
+   * 调用 this.signalR.start().then(async () => { await this.SR.invoke("method")})
+   * @returns 
+   */
+  async start() {
+    var that = this;
+
+    try {
+      //使用async和await 或 promise的then 和catch 处理来自服务端的异常
+      await this.SR.start();
+      //console.assert(this.SR.state === signalR.HubConnectionState.Connected);
+      console.log('signalR 连接成功了', this.SR.state);
+      return true;
+    } catch (error) {
+      that.failNum--;
+      console.log(`失败重试剩余次数${that.failNum}`, error)
+      if (that.failNum > 0) {
+        setTimeout(async () => {
+          await this.SR.start()
+        }, 5000);
+      }
+      return false;
+    }
+  },
+  // 接收消息处理
+  receiveMsg(connection) {
+    connection.on("onlineNum", (data) => {
+      const socketStore = useSocketStore();
+      socketStore.setOnlineNum(data)
+    });
+    // connection.on("onlineNum", (data) => {
+    //   store.dispatch("socket/changeOnlineNum", data);
+    // });
+    // // 接收欢迎语
+    // connection.on("welcome", (data) => {
+    //   console.log('welcome', data)
+    //   Notification.info(data)
+    // });
+    // // 接收后台手动推送消息
+    // connection.on("receiveNotice", (title, data) => {
+    //   Notification({
+    //     type: 'info',
+    //     title: title,
+    //     message: data,
+    //     dangerouslyUseHTMLString: true,
+    //     duration: 0
+    //   })
+    // })
+    // // 接收系统通知/公告
+    // connection.on("moreNotice", (data) => {
+    //   if (data.code == 200) {
+    //     store.dispatch("socket/getNoticeList", data.data);
+    //   }
+    // })
+  }
+}