/// <summary>
/// Realiza a leitura de forma assincrona.
/// </summary>
/// <param name="buffer"></param>
/// <param name="offset"></param>
/// <param name="count"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
public override async Task <int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
{
if (_chunkLength == null)
{
string rawLength = _stream.ReadLine();
int length = Int32.Parse(rawLength, NumberStyles.HexNumber, CultureInfo.InvariantCulture);
if (length == 0)
{
return(0);
}
_chunkLength = length;
}
int maxRead = Math.Min(count - offset, _chunkLength.Value - _consumed);
int read = await _stream.ReadAsync(buffer, offset, maxRead, cancellationToken);
_consumed += read;
if (_consumed >= _chunkLength)
{
_stream.ReadLine();
_chunkLength = null;
_consumed = 0;
}
return(read);
}
