public override ValueTask <ConnectionContext> ConnectAsync(IFeatureCollection?features = null, CancellationToken cancellationToken = default)
{
QuicStream quicStream;
var streamDirectionFeature = features?.Get <IStreamDirectionFeature>();
if (streamDirectionFeature != null)
{
if (streamDirectionFeature.CanRead)
{
quicStream = _connection.OpenBidirectionalStream();
}
else
{
quicStream = _connection.OpenUnidirectionalStream();
}
}
else
{
quicStream = _connection.OpenBidirectionalStream();
}
// Only a handful of control streams are created by the server and they last for the
// lifetime of the connection. No value in pooling them.
QuicStreamContext?context = new QuicStreamContext(this, _context);
context.Initialize(quicStream);
context.Start();
QuicLog.ConnectedStream(_log, context);
return(new ValueTask <ConnectionContext>(context));
}
public static void StreamPause(ILogger logger, QuicStreamContext streamContext)
{
if (logger.IsEnabled(LogLevel.Debug))
{
StreamPauseCore(logger, streamContext.ConnectionId);
}
}
public static void ConnectedStream(ILogger logger, QuicStreamContext streamContext)
{
if (logger.IsEnabled(LogLevel.Debug))
{
ConnectedStreamCore(logger, streamContext.ConnectionId, GetStreamType(streamContext));
}
}
public static void StreamError(ILogger logger, QuicStreamContext streamContext, Exception ex)
{
if (logger.IsEnabled(LogLevel.Debug))
{
StreamErrorCore(logger, streamContext.ConnectionId, ex);
}
}
public static void StreamAbortWrite(ILogger logger, QuicStreamContext streamContext, long errorCode, string reason)
{
if (logger.IsEnabled(LogLevel.Debug))
{
StreamAbortWriteCore(logger, streamContext.ConnectionId, errorCode, reason);
}
}
public static void StreamAbortedRead(ILogger logger, QuicStreamContext streamContext, long errorCode)
{
if (logger.IsEnabled(LogLevel.Debug))
{
StreamAbortedReadCore(logger, streamContext.ConnectionId, errorCode);
}
}
public static void StreamShutdownWrite(ILogger logger, QuicStreamContext streamContext, string reason)
{
if (logger.IsEnabled(LogLevel.Debug))
{
StreamShutdownWriteCore(logger, streamContext.ConnectionId, reason);
}
}
public static void StreamReused(ILogger logger, QuicStreamContext streamContext)
{
if (logger.IsEnabled(LogLevel.Trace))
{
StreamReusedCore(logger, streamContext.ConnectionId);
}
}
public QuicStream(QuicConnection connection, StreamId streamId)
{
StreamId = streamId;
Type = streamId.Type;
_connection = connection;
Context = new QuicStreamContext(this, _connection.Context);
}
static void Main(string[] args)
{
QuicClient client = new QuicClient();
QuicContext context = client.Connect("127.0.0.1", 11000); // Connect to peer (Server)
QuicStreamContext sc = client.CreateStream(); // Create a data stream
sc.Send(Encoding.UTF8.GetBytes("Hello from Client!")); // Send Data
sc.Close(); // Close the stream after processing
}
//private static void Listener_OnClientConnected(QuicContext obj)
//{
// System.Console.WriteLine("Client connected.");
// obj.OnDataReceived += Obj_OnDataReceived;
//}
private static void Obj_OnDataReceived(QuicStreamContext obj)
{
System.Console.WriteLine("Data received");
foreach (byte b in obj.Data)
{
System.Console.Write(string.Format("{0},", b));
}
// Echo back to the client
obj.Send(Encoding.UTF8.GetBytes("Echo!"));
}
internal bool TryReturnStream(QuicStreamContext stream)
{
lock (_poolLock)
{
if (!_streamPoolHeartbeatInitialized)
{
// Heartbeat feature is added to connection features by Kestrel.
// No event is on the context is raised between feature being added and serving
// connections so initialize heartbeat the first time a stream is added to
// the connection's stream pool.
var heartbeatFeature = Features.Get <IConnectionHeartbeatFeature>();
if (heartbeatFeature == null)
{
throw new InvalidOperationException($"Required {nameof(IConnectionHeartbeatFeature)} not found in connection features.");
}
heartbeatFeature.OnHeartbeat(static state => ((QuicConnectionContext)state).RemoveExpiredStreams(), this);
public override async ValueTask <ConnectionContext?> AcceptAsync(CancellationToken cancellationToken = default)
{
try
{
var stream = await _connection.AcceptStreamAsync(cancellationToken);
QuicStreamContext?context = null;
// Only use pool for bidirectional streams. Just a handful of unidirecitonal
// streams are created for a connection and they live for the lifetime of the connection.
if (stream.CanRead && stream.CanWrite)
{
lock (_poolLock)
{
StreamPool.TryPop(out context);
}
}
if (context == null)
{
context = new QuicStreamContext(this, _context);
}
else
{
context.ResetFeatureCollection();
context.ResetItems();
}
context.Initialize(stream);
context.Start();
QuicLog.AcceptedStream(_log, context);
return(context);
}
catch (QuicConnectionAbortedException ex)
{
// Shutdown initiated by peer, abortive.
_error = ex.ErrorCode;
QuicLog.ConnectionAborted(_log, this, ex.ErrorCode, ex);
ThreadPool.UnsafeQueueUserWorkItem(state =>
{
state.CancelConnectionClosedToken();
},
this,
preferLocal: false);
// Throw error so consumer sees the connection is aborted by peer.
throw new ConnectionResetException(ex.Message, ex);
}
catch (QuicOperationAbortedException ex)
{
lock (_shutdownLock)
{
// This error should only happen when shutdown has been initiated by the server.
// If there is no abort reason and we have this error then the connection is in an
// unexpected state. Abort connection and throw reason error.
if (_abortReason == null)
{
Abort(new ConnectionAbortedException("Unexpected error when accepting stream.", ex));
}
_abortReason !.Throw();
}
}
catch (OperationCanceledException)
{
Debug.Assert(cancellationToken.IsCancellationRequested, "Error requires cancellation is requested.");
lock (_shutdownLock)
{
// Connection has been aborted. Throw reason exception.
_abortReason?.Throw();
}
}
catch (Exception ex)
{
Debug.Fail($"Unexpected exception in {nameof(QuicConnectionContext)}.{nameof(AcceptAsync)}: {ex}");
throw;
}
// Return null for graceful closure or cancellation.
return(null);
}
public async Task StreamPool_Heartbeat_ExpiredStreamRemoved()
{
// Arrange
var now = new DateTimeOffset(2021, 7, 6, 12, 0, 0, TimeSpan.Zero);
var testSystemClock = new TestSystemClock {
UtcNow = now
};
await using var connectionListener = await QuicTestHelpers.CreateConnectionListenerFactory(LoggerFactory, testSystemClock);
var options = QuicTestHelpers.CreateClientConnectionOptions(connectionListener.EndPoint);
using var clientConnection = new QuicConnection(QuicImplementationProviders.MsQuic, options);
await clientConnection.ConnectAsync().DefaultTimeout();
await using var serverConnection = await connectionListener.AcceptAndAddFeatureAsync().DefaultTimeout();
var testHeartbeatFeature = new TestHeartbeatFeature();
serverConnection.Features.Set <IConnectionHeartbeatFeature>(testHeartbeatFeature);
// Act & Assert
var quicConnectionContext = Assert.IsType <QuicConnectionContext>(serverConnection);
Assert.Equal(0, quicConnectionContext.StreamPool.Count);
var stream1 = await QuicTestHelpers.CreateAndCompleteBidirectionalStreamGracefully(clientConnection, serverConnection);
Assert.Equal(1, quicConnectionContext.StreamPool.Count);
QuicStreamContext pooledStream = quicConnectionContext.StreamPool._array[0];
Assert.Same(stream1, pooledStream);
Assert.Equal(now.Ticks + QuicConnectionContext.StreamPoolExpiryTicks, pooledStream.PoolExpirationTicks);
now = now.AddMilliseconds(100);
testSystemClock.UtcNow = now;
testHeartbeatFeature.RaiseHeartbeat();
// Not removed.
Assert.Equal(1, quicConnectionContext.StreamPool.Count);
var stream2 = await QuicTestHelpers.CreateAndCompleteBidirectionalStreamGracefully(clientConnection, serverConnection);
Assert.Equal(1, quicConnectionContext.StreamPool.Count);
pooledStream = quicConnectionContext.StreamPool._array[0];
Assert.Same(stream1, pooledStream);
Assert.Equal(now.Ticks + QuicConnectionContext.StreamPoolExpiryTicks, pooledStream.PoolExpirationTicks);
Assert.Same(stream1, stream2);
now = now.AddTicks(QuicConnectionContext.StreamPoolExpiryTicks);
testSystemClock.UtcNow = now;
testHeartbeatFeature.RaiseHeartbeat();
// Not removed.
Assert.Equal(1, quicConnectionContext.StreamPool.Count);
now = now.AddTicks(1);
testSystemClock.UtcNow = now;
testHeartbeatFeature.RaiseHeartbeat();
// Removed.
Assert.Equal(0, quicConnectionContext.StreamPool.Count);
}
private static StreamType GetStreamType(QuicStreamContext streamContext) =>
streamContext.CanRead && streamContext.CanWrite
? StreamType.Bidirectional
: StreamType.Unidirectional;