fix: browser_context.route for service worker requests (#2345)

LironHaroni · web-flow · commit dd85f0d681cc · 2024-03-08T00:01:44.000+01:00
diff --git a/playwright/_impl/_network.py b/playwright/_impl/_network.py
@@ -262,7 +262,10 @@ def _target_closed_future(self) -> asyncio.Future:
         return page._closed_or_crashed_future
 
     def _safe_page(self) -> "Optional[Page]":
-        return cast("Frame", from_channel(self._initializer["frame"]))._page
+        frame = from_nullable_channel(self._initializer.get("frame"))
+        if not frame:
+            return None
+        return cast("Frame", frame)._page
 
 
 class Route(ChannelOwner):
