public async Task <int> SendAsync(FrameStream frames, CancellationToken token)
{
var bytesSent = 0;
foreach (var frame in frames.GetBuffers())
{
var frameBytes = new byte[4];
MessageFramingUtil.EncodeLength((int)frame.Length, frameBytes, 0);
await _stream.WriteAsync(frameBytes, 0, 4, token);
bytesSent += 4;
await _stream.WriteAsync(frame.GetBuffer(), 0, (int)frame.Length, token);
bytesSent += (int)frame.Length;
}
return(bytesSent);
}
public async Task <FrameStream> ReceiveAsync(CancellationToken token)
{
var result = new FrameStream();
var frameSizeBytes = new byte[4];
await ReadBytesAsync(_stream, frameSizeBytes, 0, 4, token);
var frameSize = MessageFramingUtil.DecodeLength(frameSizeBytes, 0);
if (frameSize == 0)
{
return(FrameStream.EMPTY);
}
var frame = new MemoryStream(new byte[frameSize], 0, frameSize, true, true);
await ReadBytesAsync(_stream, frame.GetBuffer(), 0, frameSize, token);
frame.SetLength(frameSize);
result.AppendFrame(frame);
return(result);
}