private async ValueTask CancelationHelper(Task jsTask, CancellationToken cancellationToken, WebSocketState previousState)
{
if (jsTask.IsCompletedSuccessfully)
{
return;
}
try
{
using (var receiveRegistration = cancellationToken.Register(() =>
{
CancelablePromise.CancelPromise(jsTask);
}))
{
await jsTask.ConfigureAwait(true);
return;
}
}
catch (JSException ex)
{
if (State == WebSocketState.Aborted)
{
throw new OperationCanceledException(nameof(WebSocketState.Aborted), ex);
}
if (cancellationToken.IsCancellationRequested)
{
_state = WebSocketState.Aborted;
throw new OperationCanceledException(cancellationToken);
}
if (ex.Message == "OperationCanceledException")
{
_state = WebSocketState.Aborted;
throw new OperationCanceledException("The operation was cancelled.", ex, cancellationToken);
}
if (previousState == WebSocketState.Connecting)
{
throw new WebSocketException(WebSocketError.Faulted, SR.net_webstatus_ConnectFailure, ex);
}
throw new WebSocketException(WebSocketError.NativeError, ex);
}
}
public static async ValueTask <T> CancelationHelper <T>(Task <T> promise, CancellationToken cancellationToken, JSObject?abortController = null, JSObject?fetchResponse = null)
{
if (promise.IsCompletedSuccessfully)
{
return(promise.Result);
}
try
{
using (var operationRegistration = cancellationToken.Register(() =>
{
CancelablePromise.CancelPromise(promise);
if (abortController != null)
{
AbortRequest(abortController);
}
if (fetchResponse != null)
{
AbortResponse(fetchResponse);
}
}))
{
return(await promise.ConfigureAwait(true));
}
}
catch (OperationCanceledException oce) when(cancellationToken.IsCancellationRequested)
{
throw CancellationHelper.CreateOperationCanceledException(oce, cancellationToken);
}
catch (JSException jse)
{
if (jse.Message.StartsWith("AbortError", StringComparison.Ordinal))
{
throw CancellationHelper.CreateOperationCanceledException(jse, CancellationToken.None);
}
if (cancellationToken.IsCancellationRequested)
{
throw CancellationHelper.CreateOperationCanceledException(jse, cancellationToken);
}
throw new HttpRequestException(jse.Message, jse);
}
}
