WebSockets support

[daetojemax]

I’m trying to connect to a WebSocket using URLSessionWebSocketTask in native mode with SKIP. On iOS everything works perfectly. Android compiles, but at runtime I get the error: NSLocalizedDescription=WebSockets not supported by libcurl. What’s the recommended way to work with WebSockets in SKIP? Any guidance or example code for a SKIP‑friendly approach would be greatly appreciated.

[marcprux]

WebSockets ought to work, but they aren't enabled in libcurl for the Swift SDK for Android. This is reported at #559. Hopefully it will be a simple matter of turning on the flag (see swift-android-sdk/swift-docker#17), but we'll need to get it into the next version's SDK build, so it might be a little while.

In the interim, you might look into using swift-nio's WebSockets support (https://github.com/apple/swift-nio?tab=readme-ov-file#low-level-protocol-implementations), which may work.

Also, if you are using any transpiled Skip Lite libraries alongside Skip Fuse, note that our transpiled URLSessionWebSocketTask does work there (see #106 (comment)), and bridges to Android's native websockets implementation. So that could be an option if you want to mix Skip Fuse and Skip Lite libraries.

[marcprux]

We've filed a PR against the Android SDK build at swiftlang/swift-docker#522 that will enable websocket support in the future.

[daetojemax]

Big thanks for the detailed answer and the provided references!