Log when gevent is used but WebSocket is missing (#1140)

miguelgrinberg · Dec 30, 2019 · 15ad45a · 15ad45a
1 parent a05ff51
commit 15ad45a
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/flask_socketio/__init__.py b/flask_socketio/__init__.py
@@ -582,6 +582,9 @@ def run_server():
                 from geventwebsocket.handler import WebSocketHandler
                 websocket = True
             except ImportError:
+                app.logger.warning(
+                    'WebSocket transport not available. Install '
+                    'gevent-websocket for improved performance.')
                 websocket = False
 
             log = 'default'