[Bug]: page.route_web_socket doesn't intercept the ws connection

[nishirken]

Version

1.49.1

Steps to reproduce

The test code uses a custom chromium path. TEST_BROWSER_PATH.

1. Clone https://github.com/nishirken/websocket-test
2. Install uv pip install uv
3. Install deps uv sync && npm i
4. Launch the client python -m http.server 8000
5. Launch the server uv run server.py
6. Launch the python test uv run test_websocket.py
7. Launch the ts test npx ts-node test_websocket.ts

Expected behavior

The python and ts versions should behave the same.
The python version prints a message when the WebSocket route is established and sends a fake message to the client. (The ts version does it as expected)

Actual behavior

No logs and no messages in the python version.

Additional context

No response

Environment

- Operating System: Linux 6.11 NixOS 24.05 (Uakari) 24.05 (Uakari)
- CPU: (8) x64 11th Gen Intel(R) Core(TM) i7-1185G7 @ 3.00GHz
- Browser: Chromium
- Python Version: [3.11.10]
- Other info:

[mxschmitt]

Thank you for the great bug report! Looks like this is about the URL matching - I created a PR with a fix in #2687. As a workaround could you try this?

await page.route_web_socket("ws://localhost:8080/", route_handler)

[nishirken]

I've installed the version from github. It works with a string URL.
But a regex url doesn't work.
I've updated the example with a get param in the url.

await page.route_web_socket(r"^ws://.*", route_handler)

doesn't intercept the connection URL

"ws://localhost:8080?a=1"

[mxschmitt]

r"^ws://.*" is just a str in Python - if you want to use a regex, you need to use:

    await page.route_web_socket(re.compile(r"^ws://.*"), route_handler)

[nishirken]

It does work. Thanks.