protected override async Task <IDuplexPipe> ConnectPipelineAsync(int sendMaxMessageSize, int receiveMaxMessageSize, CancellationToken cancellationToken)
{
// TODO: The URL should be parsed in RpConnectionInfo constructor .
// If invalid an ArgumentException should be thrown there.
if (this.ConnectionInfo.HostUrl is Uri url)
{
#pragma warning disable CA2000 // Dispose objects before losing scope
string pipeName = PipeUri.LookupPipeName(url);
if (string.IsNullOrEmpty(pipeName))
{
throw new RpcCommunicationException(RpcCommunicationStatus.Unavailable, $"Failed to connect to named pipe at '{url}'");
}
NamedPipeClientStream?pipeClientStream = new NamedPipeClientStream(".", pipeName, PipeDirection.InOut, System.IO.Pipes.PipeOptions.Asynchronous);
try
{
await pipeClientStream.ConnectAsync(cancellationToken).ContextFree();
var sendOptions = new System.IO.Pipelines.PipeOptions(
pauseWriterThreshold: sendMaxMessageSize * 2, resumeWriterThreshold: sendMaxMessageSize,
readerScheduler: System.IO.Pipelines.PipeScheduler.Inline,
useSynchronizationContext: false);
var receiveOptions = new System.IO.Pipelines.PipeOptions(
pauseWriterThreshold: receiveMaxMessageSize * 2, resumeWriterThreshold: receiveMaxMessageSize,
readerScheduler: System.IO.Pipelines.PipeScheduler.Inline,
useSynchronizationContext: false);
var connection = new StreamDuplexPipe(pipeClientStream); //, sendOptions, receiveOptions);
pipeClientStream = null; // Prevent disposal
return(connection);
}
finally
{
pipeClientStream?.Dispose();
}
#pragma warning restore CA2000 // Dispose objects before losing scope
}
else
{
throw new InvalidOperationException("Missing connection URL.");
}
}
public PipeTransport(PipeStream pipeStream, ILogger <PipeTransport> logger)
{
ConnectionClosed = _connectionClosedTokenSource.Token;
_stream = pipeStream;
_logger = logger;
var pipeOptions = new System.IO.Pipelines.PipeOptions(
readerScheduler: PipeScheduler.ThreadPool,
writerScheduler: PipeScheduler.ThreadPool,
useSynchronizationContext: false
);
// these pipes operate as pairs
// Transport is the pipes Kestrel will use to send and receive data
// Application is how this class will read data to send and buffer data that's read from the remote
var pipes = DuplexPipe.CreateConnectionPair(pipeOptions, pipeOptions);
Transport = pipes.Transport;
_application = pipes.Application;
}
public static (IDuplexPipe Transport, IDuplexPipe Application) CreateConnectionPair(PipeOptions inputOptions, PipeOptions outputOptions)
{
var input = new Pipe(inputOptions);
var output = new Pipe(outputOptions);
var transportToApplication = new PipeConnection(output.Reader, input.Writer);
var applicationToTransport = new PipeConnection(input.Reader, output.Writer);
return(applicationToTransport, transportToApplication);
}
public StreamPipeline(PipeOptions options)
{
this.pipe = new Pipe(options);
this.reader = new StreamPipelineReader(this.pipe.Reader);
this.writer = new StreamPipelineWriter(this.pipe.Writer);
}
public IPipe Create(PipeOptions options)
{
return(new Pipe(_pool, options));
}
public StreamPipeConnection(PipeOptions options, Stream stream)
{
Input = CreateReader(options, stream);
Output = CreateWriter(options, stream);
}