Broken Tornado Intrumentation for Websocket

[shikanime]

Describe your environment

OS: Ubuntu 22.04
Python version: 3.10.12
Package version: 0.47b0

What happened?

The WebSocketHandler.finish method, called after the WebSocket upgrade, results in lost context at https://github.com/tornadoweb/tornado/blob/1f8b2d78fee5e5a15e686815e0285d4a3c831a2c/tornado/websocket.py#L929

Steps to Reproduce

from tornado import websocket, web, ioloop

class WebsocketHandler(websocket.WebSocketHandler):
    def open(self):
        print("WebSocket opened")

    def on_message(self, message):
        self.write_message(u"You said: " + message)

    def on_close(self):
        print("WebSocket closed")


app = web.Application([
    (r'/ws', WebsocketHandler),
])

if __name__ == '__main__':
    app.listen(8888)
    ioloop.IOLoop.instance().start()

opentelemetry-instrument \
    --traces_exporter console \
    --metrics_exporter console \
    --logs_exporter console \
    --service_name cmc-front-end \
    python \
    main.py

const ws = new WebSocket("ws://localhost:8888/ws");
ws.onopen = function() {
   ws.send("Hello, world");
};
ws.onmessage = function (evt) {
    console.log(evt)
};

deno run main.js

Expected Result

Context to flow from the protocol upgrade to the message handling.

Actual Result

Context is lost after the initial phase is finished.

Additional context

No response

Would you like to implement a fix?

Yes