public override async ValueTask <ReadResult> ReadAsync(CancellationToken cancellationToken)
{
if (_bufferHasUnexaminedData == false &&
IsCompleted == false)
{
try
{
// memory based on default page size for MemoryPool being used
var memory = _buffer.GetTrailingMemory();
_logger.LogTrace("TODO: ReadStarting");
var bytes = await _socket.ReceiveAsync(memory, cancellationToken);
_logger.LogTrace("TODO: ReadComplete {bytes}", bytes);
if (bytes != 0)
{
// advance rolling memory based on number of bytes received
_buffer.TrailingMemoryFilled(bytes);
// the new bytes have not been examined yet. this flag
// is true until the parser calls AdvanceTo with
// an examined SequencePosition corresponding to the tail
_bufferHasUnexaminedData = true;
}
else
{
// reading 0 bytes means the remote client has
// sent FIN and no more bytes will be received
_isCompleted = true;
_connection.FireConnectionClosed();
}
}
catch (TaskCanceledException)
{
_logger.LogTrace("TODO: ReadCanceled");
_isCanceled = true;
_connection.FireConnectionClosed();
}
catch (Exception ex)
{
_logger.LogTrace(ex, "TODO: ReadFailed");
// Return ReadResult.IsCompleted == true from now on
// because we assume any read exceptions are not temporary
_isCompleted = true;
_connection.FireConnectionClosed();
#if NETSTANDARD2_0
FireWriterCompleted(ex);
#endif
}
}
return(new ReadResult(
_buffer.GetOccupiedMemory(),
isCanceled: IsCanceled,
isCompleted: IsCompleted));
}
public override async ValueTask <ReadResult> ReadAsync(CancellationToken cancellationToken)
{
if (_bufferHasUnexaminedData == false &&
IsCompleted == false)
{
try
{
// memory based on default page size for MemoryPool being used
var memory = _buffer.GetTrailingMemory();
if (_options.HighVolumeLogging)
{
_logger.ReadStarting(_connection.ConnectionId, memory.Length);
}
var bytes = await _socket.ReceiveAsync(memory, cancellationToken);
if (_options.HighVolumeLogging)
{
_logger.ReadSucceeded(_connection.ConnectionId, bytes);
}
if (bytes != 0)
{
// advance rolling memory based on number of bytes received
_buffer.TrailingMemoryFilled(bytes);
// the new bytes have not been examined yet. this flag
// is true until the parser calls AdvanceTo with
// an examined SequencePosition corresponding to the tail
_bufferHasUnexaminedData = true;
}
else
{
// reading 0 bytes means the remote client has
// sent FIN and no more bytes will be received
_isCompleted = true;
}
}
catch (TaskCanceledException)
{
_logger.ReadCanceled(_connection.ConnectionId);
_isCanceled = true;
}
catch (Exception error)
{
_logger.ReadFailed(_connection.ConnectionId, error);
// Return ReadResult.IsCompleted == true from now on
// because we assume any read exceptions are not temporary
_isCompleted = true;
// inform the protocol layer the remote client is abnormally unreadable
_connection.FireConnectionClosed();
}
}
return(new ReadResult(
_buffer.GetOccupiedMemory(),
isCanceled: IsCanceled,
isCompleted: IsCompleted));
}
