public Http2Session(Stream stream, ConnectionEnd end,
bool usePriorities, bool useFlowControl, bool isSecure,
CancellationToken cancel,
int initialWindowSize = Constants.InitialFlowControlWindowSize,
int maxConcurrentStreams = Constants.DefaultMaxConcurrentStreams)
{
if (stream == null)
throw new ArgumentNullException("stream is null");
if (cancel == null)
throw new ArgumentNullException("cancellation token is null");
if (maxConcurrentStreams <= 0)
throw new ArgumentOutOfRangeException("maxConcurrentStreams cant be less or equal then 0");
if (initialWindowSize <= 0 && useFlowControl)
throw new ArgumentOutOfRangeException("initialWindowSize cant be less or equal then 0");
_ourEnd = end;
_usePriorities = usePriorities;
_useFlowControl = useFlowControl;
_isSecure = isSecure;
_cancelSessionToken = cancel;
if (_ourEnd == ConnectionEnd.Client)
{
_remoteEnd = ConnectionEnd.Server;
_lastId = -1; // Streams opened by client are odd
//if we got unsecure connection then server will respond with id == 1. We cant initiate
//new stream with id == 1.
if (!(stream is SslStream))
{
_lastId = 3;
}
}
else
{
_remoteEnd = ConnectionEnd.Client;
_lastId = 0; // Streams opened by server are even
}
_goAwayReceived = false;
_comprProc = new CompressionProcessor(_ourEnd);
_ioStream = stream;
_frameReader = new FrameReader(_ioStream);
ActiveStreams = new ActiveStreams();
_writeQueue = new WriteQueue(_ioStream, ActiveStreams, _comprProc, _usePriorities);
OurMaxConcurrentStreams = maxConcurrentStreams;
RemoteMaxConcurrentStreams = maxConcurrentStreams;
InitialWindowSize = initialWindowSize;
_flowControlManager = new FlowControlManager(this);
if (!_useFlowControl)
{
_flowControlManager.Options = (byte) FlowControlOptions.DontUseFlowControl;
}
SessionWindowSize = 0;
_headersSequences = new HeadersSequenceList();
_promisedResources = new Dictionary<int, string>();
}
private void Close(ResetStatusCode status)
{
if (_disposed)
return;
Http2Logger.LogDebug("Session closing");
_disposed = true;
// Dispose of all streams
foreach (var stream in ActiveStreams.Values)
{
//Cancel all opened streams
stream.Dispose(ResetStatusCode.Cancel);
}
if (!_goAwayReceived)
WriteGoAway(status);
OnSettingsSent = null;
OnFrameReceived = null;
//Missing GoAway means connection was forcibly closed by the remote ep. This means that we can
//send nothing into this connection. No need trying to send GoAway.
//Hence we may not check for !_goAwayReceived
if (_writeQueue != null)
{
_writeQueue.Flush();
_writeQueue.Dispose();
}
if (_frameReader != null)
{
_frameReader.Dispose();
_frameReader = null;
}
if (_comprProc != null)
{
_comprProc.Dispose();
_comprProc = null;
}
if (_ioStream != null)
{
_ioStream.Close();
_ioStream = null;
}
if (_pingReceived != null)
{
_pingReceived.Dispose();
_pingReceived = null;
}
if (_settingsAckReceived != null)
{
_settingsAckReceived.Dispose();
_settingsAckReceived = null;
}
if (OnSessionDisposed != null)
{
OnSessionDisposed(this, null);
}
OnSessionDisposed = null;
Http2Logger.LogDebug("Session closed");
}
private void Close(ResetStatusCode status)
{
if (_disposed)
return;
Http2Logger.LogDebug("Session closing");
_disposed = true;
// Dispose of all streams
foreach (var stream in StreamDictionary.Values)
{
//Cancel all opened streams
stream.Close(ResetStatusCode.None);
}
if (!_goAwayReceived)
{
WriteGoAway(status);
//TODO fix delay. wait for goAway send and then dispose WriteQueue
//Wait for GoAway send
using (var goAwayDelay = new ManualResetEvent(false))
{
goAwayDelay.WaitOne(500);
}
}
OnSettingsSent = null;
OnFrameReceived = null;
if (_frameReader != null)
{
_frameReader.Dispose();
_frameReader = null;
}
if (_writeQueue != null)
{
_writeQueue.Flush();
_writeQueue.Dispose();
}
if (_comprProc != null)
{
_comprProc.Dispose();
_comprProc = null;
}
if (_ioStream != null)
{
_ioStream.Close();
_ioStream = null;
}
if (_pingReceived != null)
{
_pingReceived.Dispose();
_pingReceived = null;
}
if (_settingsAckReceived != null)
{
_settingsAckReceived.Dispose();
_settingsAckReceived = null;
}
if (OnSessionDisposed != null)
{
OnSessionDisposed(this, null);
}
OnSessionDisposed = null;
Http2Logger.LogDebug("Session closed");
}
