Update docs

docs/source/tour.rst

@@ -235,12 +235,19 @@ Using ``before_request``
 
 If you'd like a view to be executed before every request, simply do the following::
 
-    @api.route(before_request=True)
+    @api.before_request()
     def prepare_response(req, resp):
         resp.headers["X-Pizza"] = "42"
 
 Now all requests to your HTTP Service will include an ``X-Pizza`` header.
 
+For ``websockets``::
+
+    @api.before_request(websocket=True)
+    def prepare_response(ws):
+        await ws.accept()
+
+
 WebSocket Support
 -----------------