private async Task <bool> MoveNextCore(CancellationToken cancellationToken)
{
CancellationTokenSource cts = null;
try
{
// Linking tokens is expensive. Only create a linked token if the token passed in requires it
if (cancellationToken.CanBeCanceled)
{
cts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, _call.CancellationToken);
cancellationToken = cts.Token;
}
else
{
cancellationToken = _call.CancellationToken;
}
cancellationToken.ThrowIfCancellationRequested();
if (_httpResponse == null)
{
await _call.SendTask.ConfigureAwait(false);
_httpResponse = _call.HttpResponse;
}
if (_responseStream == null)
{
_responseStream = await _httpResponse.Content.ReadAsStreamAsync().ConfigureAwait(false);
}
Current = await _responseStream.ReadStreamedMessageAsync(_call.Method.ResponseMarshaller.Deserializer, cancellationToken).ConfigureAwait(false);
if (Current == null)
{
// No more content in response so mark as finished
_call.FinishResponse();
return(false);
}
return(true);
}
catch (OperationCanceledException)
{
throw _call.CreateCanceledStatusException();
}
finally
{
cts?.Dispose();
}
}
