allow extra

homeassistant/components/websocket_api/connection.py

@@ -221,12 +221,7 @@ class ActiveConnection:
         handler, schema = handler_schema
 
         try:
-            if schema is False:
-                if len(msg) > 2:
-                    raise vol.Invalid("Message has unexpected keys")
-                handler(self.hass, self, msg)
-            else:
-                handler(self.hass, self, schema(msg))
+            handler(self.hass, self, msg if schema is False else schema(msg))
         except Exception as err:  # pylint: disable=broad-except
             self.async_handle_exception(msg, err)
 

tests/components/websocket_api/test_decorators.py

@@ -130,14 +130,12 @@ async def test_async_response_request_context(
         }
     )
 
+    # Extra keys in message are allowed and ignored
+    # to match the default of ALLOW_EXTRA
     msg = await websocket_client.receive_json()
     assert msg["id"] == 10
-    assert not msg["success"]
-    assert msg["error"]["code"] == "invalid_format"
-    assert msg["error"]["message"] == (
-        "Message has unexpected keys. "
-        "Got {'id': 10, 'type': 'test-get-request', 'not_valid': 'dog'}"
-    )
+    assert msg["success"]
+    assert msg["result"] == "/api/websocket"
 
 
 async def test_supervisor_only(hass: HomeAssistant, websocket_client) -> None: