with the previous fix connection loss was not detected anymore, now using the ping method based on writing data which is more robust but may take a bit longer for connection loss to be detected.

pkg/server/converge/websessions.go

@@ -71,6 +71,8 @@ func GetUserLocation(r *http.Request) (*time.Location, error) {
 }
 
 func (session *WebSession) WriteNotifications(location *time.Location) {
+	timer := time.NewTicker(10 * time.Second)
+	defer timer.Stop()
 	for {
 		select {
 		case notification, ok := <-session.notifications:
@@ -83,6 +85,12 @@ func (session *WebSession) WriteNotifications(location *time.Location) {
 				log.Printf("WS connection closed: %v", err)
 				return
 			}
+		case <-timer.C:
+			_, err := session.conn.Write(make([]byte, 0, 0))
+			if err != nil {
+				log.Printf("WS connection closed: %v", err)
+				return
+			}
 		}
 	}
 }