How get the current state of the WebSocket connection?

[A-kirami]

Hi, I need to confirm the current state of the WebSocket connection.

What should I do? Thanks!

[daniel-abramov]

Sorry, I did not get the question. What do you mean by the state of the WebSocket connection?

[A-kirami]

Like WebSocket.readyState in JavaScript.

https://developer.mozilla.org/en-US/docs/Web/API/WebSocket/readyState

[daniel-abramov]

Once you get a WebSocket object (e.g. after awaiting on a connect), it's guaranteed to be in an already connected state (unlike JavaScript, Rust supports ADTs, so we don't need an enum to describe a state, a state is explicit in our case). And you can assume that it's connected up until the stream of messages closes or returns an error. Once the error is returned, the WebSocket will continue to be closed (an attempt to write to such a connection or read from it would return an error).

But if you prefer a short enum to describe the connection state, you could always introduce an additional variable for that or wrap the WebSocket, i.e. something like:

enum WebSocketState {
    Connecting(<your future here>),
    Connected(WebSocketStream),
    Closed,
}

Or use something similar.