Hi, I just started to use ktor websockets and I have a little comment about it. I want to broadcast ...

# ktor

[Andrey Z.]

Hi, I just started to use ktor websockets and I have a little comment about it.
I want to broadcast a frame to all connected clients, but I didn't find a convenient way to do it with the current API. For now I have to make a class that tracks all active sessions and send frames via that class.
I just want to say it would be a good feature (if I didn't miss anything)

[Deactivated User]

To all connected clients without filtering?

[Andrey Z.]

yes

[Deactivated User]

have you considered using a broadcast channel? Like here: https://github.com/ktorio/ktor-samples/blob/master/other/sse/src/SseApplication.kt

It is for SSE but could be adapted to websockets too

[Deactivated User]

But your problem is having to maintain a list of clients yourself, or to have to construct a frame per client?

[cy]

Well, for sure it's quite expensive to do by default, perhaps we can have a feature or option for that

[Deactivated User]

Do you miss something like:
fun Iterable<WebSocketSession>.send(frame: Frame)?

[Andrey Z.]

having to maintain a list of clients yourself

This one

[Andrey Z.]

I rather miss something like this:
fun WebSocketSession.getActiveSessions(): Iterable<WebSocketSession> or fun ApplicationEngineEnvironment.getActiveSessions(): Iterable<WebSocketSession>

[Deactivated User]

Not sure if it possible to intercept only websocket calls, so a feature could do this.