network status monitoring

2024-09-18 22:26:45 +08:00
parent cdcb3868c0
commit 3af3174c51
1 changed files with 51 additions and 0 deletions
@@ -0,0 +1,51 @@
+import dns from 'dns';
+import { EventEmitter } from 'events';
+
+class NetworkMonitor extends EventEmitter {
+    constructor() {
+        super();
+        this.isBlocked = false;
+        this.checkInterval = null;
+    }
+
+    async checkConnection() {
+        return new Promise((resolve) => {
+            dns.lookup('you.com', (err) => {
+                if (err && err.code === 'ENOTFOUND') {
+                    resolve(false);
+                } else {
+                    resolve(true);
+                }
+            });
+        });
+    }
+
+    async startMonitoring() {
+        console.log("开始网络监控...");
+        this.checkInterval = setInterval(async () => {
+            const isConnected = await this.checkConnection();
+            if (!isConnected && !this.isBlocked) {
+                this.isBlocked = true;
+                this.emit('networkDown');
+                console.log("检测到网络异常");
+            } else if (isConnected && this.isBlocked) {
+                this.isBlocked = false;
+                this.emit('networkUp');
+                console.log("网络恢复正常");
+            }
+        }, 5000);
+    }
+
+    stopMonitoring() {
+        if (this.checkInterval) {
+            clearInterval(this.checkInterval);
+            this.checkInterval = null;
+        }
+    }
+
+    isNetworkBlocked() {
+        return this.isBlocked;
+    }
+}
+
+export default NetworkMonitor;