Support EventListener on web sockets and SSE

[sawakonotsadako]

Hi, we are seeing that the RealEventSource.kt class always sets the eventListener to NONE.


So no matter how the customized event listener was implemented and configured, it will never get called.

[yschimke]

EventListener is deliberately disabled for both SSE and WebSockets.

[sawakonotsadako]

@yschimke Wonder why...

[yschimke]

They don't really make sense with those features. We haven't added specific methods for them. In the case of websockets, it's a listener anyway.

[sawakonotsadako]

They don't really make sense with those features. We haven't added specific methods for them. In the case of websockets, it's a listener anyway.

Is there any other way to monitor the behaviours like the event listener?

[swankjesse]

I’m gonna make this into an enhancement request for events on these.

[amadrian]

We use EventListener to log DNS resolution and TLS Handshake durations of our HTTPS calls.
Since websocket connections are also initially made with HTTP which then gets upgraded to WS with status 101, at least having a subset of EventListener's capabilities that allows us to track these durations would be really great!

[WZQ1993]

@yschimke May I ask if this feature has been launched?

[yschimke]

No