fix: WS-Client Ping-Loop (30s) — Verbindung bricht nicht mehr nach 70s ab

agent-windows/ws/client.go

@@ -95,6 +95,26 @@ func (c *Client) connect(stop <-chan struct{}) error {
 	})
 
 	done := make(chan struct{})
+
+	// Ping-Loop: alle 30s einen Ping senden um Verbindung am Leben zu halten
+	go func() {
+		ticker := time.NewTicker(30 * time.Second)
+		defer ticker.Stop()
+		for {
+			select {
+			case <-ticker.C:
+				conn.SetWriteDeadline(time.Now().Add(10 * time.Second))
+				if err := conn.WriteMessage(websocket.PingMessage, nil); err != nil {
+					return
+				}
+			case <-done:
+				return
+			case <-stop:
+				return
+			}
+		}
+	}()
+
 	go func() {
 		defer close(done)
 		for {
@@ -106,6 +126,7 @@ func (c *Client) connect(stop <-chan struct{}) error {
 				return
 			}
 			if resp := c.handler.Handle(msg); resp != nil {
+				conn.SetWriteDeadline(time.Now().Add(10 * time.Second))
 				conn.WriteMessage(websocket.TextMessage, resp)
 			}
 		}