Keep websocket connection alive

tfw/components/terminal/terminado_mini_server.py

@@ -17,7 +17,7 @@ class TerminadoMiniServer:
             url,
             TerminadoMiniServer.ResetterTermSocket,
             {'term_manager': self._term_manager}
-        )])
+        )], websocket_ping_interval=30)
 
     @property
     def term_manager(self):

tfw/internals/networking/serialization.py

@@ -42,7 +42,8 @@ def deserialize_tfw_msg(*args):
     """
     Return message from TFW multipart data
     """
-    return _deserialize_all(*args)[1]
+    envelope = _deserialize_all(*args)
+    return _repair_if_needed(envelope)
 
 
 def _serialize_all(*args):
@@ -84,6 +85,18 @@ def _deserialize_single(data):
         return _decode_if_needed(data)
 
 
+def _repair_if_needed(envelope):
+    """
+    Quick fix for broken messages received from separate processes.
+    """
+    if len(envelope) == 2:
+        return envelope[1]
+    for part in envelope:
+        if isinstance(part, dict):
+            return part
+    return {}
+
+
 def _encode_if_needed(value):
     """
     Return input as bytes

tfw/main/tfw_server.py

@@ -28,7 +28,7 @@ class TFWServer:
             r'/ws', ZMQWebSocketRouter, {
                 'listener': self._listener,
             }
-        )])
+        )], websocket_ping_interval=30)
 
     def listen(self):
         self.application.listen(TFWENV.WEB_PORT)