private async Task ProcessReceives()
{
while (true)
{
// Ensure we have some reasonable amount of buffer space
var buffer = _application.Output.GetMemory();
var bytesReceived = await _receiver.ReceiveAsync(buffer);
if (bytesReceived == 0)
{
// FIN
break;
}
_application.Output.Advance(bytesReceived);
var flushTask = _application.Output.FlushAsync();
if (!flushTask.IsCompleted)
{
await flushTask;
}
var result = flushTask.GetAwaiter().GetResult();
if (result.IsCompleted)
{
// Pipe consumer is shut down, do we stop writing
break;
}
}
}
private async Task ProcessReceives()
{
while (true)
{
var buffer = _application.Output.GetMemory();
var bytesReceived = await _receiver.ReceiveAsync(buffer);
if (bytesReceived == 0)
{
break;
}
_application.Output.Advance(bytesReceived);
var flushTask = _application.Output.FlushAsync();
if (!flushTask.IsCompleted)
{
await flushTask.ConfigureAwait(false);
}
var result = flushTask.Result;
if (result.IsCompleted)
{
break;
}
}
}
private async ValueTask <bool> WaitForDisconnect(Socket socket, CancellationToken cancellationToken)
{
var receiveBufferBytes = m_arrayPool.Rent(1);
try
{
var socketReceiver = new SocketReceiver(socket);
var receiveCount = await socketReceiver.ReceiveAsync(receiveBufferBytes, cancellationToken).ConfigureAwait(false);
return(receiveCount <= 0);
}
catch (SocketException socketException) when(socketException.SocketErrorCode == SocketError.ConnectionReset)
{
return(true);
}
catch (SocketException)
{
return(false);
}
finally
{
m_arrayPool.Return(receiveBufferBytes);
}
}
private async Task DoReceive()
{
Exception?error = null;
try
{
while (true)
{
if (_waitForData)
{
// Wait for data before allocating a buffer.
await _receiver.WaitForDataAsync(_socket);
}
// Ensure we have some reasonable amount of buffer space
var buffer = Input.GetMemory(MinAllocBufferSize);
var bytesReceived = await _receiver.ReceiveAsync(_socket, buffer);
if (bytesReceived == 0)
{
// FIN
SocketsLog.ConnectionReadFin(_logger, this);
break;
}
Input.Advance(bytesReceived);
var flushTask = Input.FlushAsync();
var paused = !flushTask.IsCompleted;
if (paused)
{
SocketsLog.ConnectionPause(_logger, this);
}
var result = await flushTask;
if (paused)
{
SocketsLog.ConnectionResume(_logger, this);
}
if (result.IsCompleted || result.IsCanceled)
{
// Pipe consumer is shut down, do we stop writing
break;
}
}
}
catch (SocketException ex) when(IsConnectionResetError(ex.SocketErrorCode))
{
// This could be ignored if _shutdownReason is already set.
error = new ConnectionResetException(ex.Message, ex);
// There's still a small chance that both DoReceive() and DoSend() can log the same connection reset.
// Both logs will have the same ConnectionId. I don't think it's worthwhile to lock just to avoid this.
if (!_socketDisposed)
{
SocketsLog.ConnectionReset(_logger, this);
}
}
catch (Exception ex)
when((ex is SocketException socketEx && IsConnectionAbortError(socketEx.SocketErrorCode)) ||
ex is ObjectDisposedException)
{
// This exception should always be ignored because _shutdownReason should be set.
error = ex;
if (!_socketDisposed)
{
// This is unexpected if the socket hasn't been disposed yet.
SocketsLog.ConnectionError(_logger, this, error);
}
}
catch (Exception ex)
{
// This is unexpected.
error = ex;
SocketsLog.ConnectionError(_logger, this, error);
}
finally
{
// If Shutdown() has already bee called, assume that was the reason ProcessReceives() exited.
Input.Complete(_shutdownReason ?? error);
FireConnectionClosed();
await _waitForConnectionClosedTcs.Task;
}
}
