send pings

raspberry/roberto/camera/camera_gstreamer_webrtc.py

@@ -413,7 +413,7 @@ class WebRTCCamera(Thread):
         else:
             print("Unknown message \"%s\", ignoring" % data['data'])
 
-    @sio.event
+    @sio.on('connect')
     def connected():
         print("I'm connected!")
 
@@ -421,7 +421,7 @@ class WebRTCCamera(Thread):
     def connect_error():
         print("The connection failed!")
 
-    @sio.event
+    @sio.on('disconnect')
     def disconnected():
         print("I'm disconnected!")
 

raspberry/roberto/views/frontend/templates/index.html

@@ -225,6 +225,12 @@ function getConnectionStats() {
 
 var statsInterval = window.setInterval(getConnectionStats, 1000);
 
+setInterval(function(){
+    if (socket.connected) {
+        socket.emit('ping');
+    }
+}, 5000);
+
     </script>
 
     <script src="{{ url_for('frontend.gamepad_js') }}"></script>

raspberry/roberto/views/websocket/routes.py

@@ -111,6 +111,11 @@ def connect():
     if sid != webrtccamera.sid:
         serial.add_callback('B', display_battery)
 
+@socketio.on('ping', namespace='/webrtc')
+def ping():
+    sid = request.sid
+    print("Received ping from %s" % sid)
+
 @socketio.on_error_default
 def default_error_handler(e):
     print(request.event["message"]) # "my error event"