void write()
{
foreach (var frame in queue.GetConsumingEnumerable())
{
if (frame == null)
{
Log.Info("Null frame dequeued");
continue;
}
Log.Debug("-> {0}", frame);
var data = AltLinq.ToArray(frame.ToBytes());
lockWrite.WaitOne();
try {
clientStream.Write(data, 0, data.Length);
clientStream.Flush();
var stream = streamManager.Get(frame.StreamIdentifier);
stream.ProcessSentFrame(frame);
} catch (Exception ex) {
Log.Warn("Error writing frame: {0}, {1}", frame.StreamIdentifier, ex);
} finally {
lockWrite.Release();
}
}
}
public IEnumerable <byte> ToBytes()
{
var data = new List <byte> ();
// Copy Frame Length
var frameLength = To24BitInt(Length);
data.AddRange(ByteArrayExtensions.EnsureBigEndian(frameLength));
// Copy Type
data.Add((byte)Type);
// Copy Flags
data.Add(Flags);
// 1 Bit reserved as unset (0) so let's take the first bit of the next 32 bits and unset it
var streamId = Util.ConvertToUInt31(StreamIdentifier);
data.AddRange(ByteArrayExtensions.EnsureBigEndian(streamId));
var payloadData = AltLinq.ToArray(Payload);
// Now the payload
data.AddRange(payloadData);
return(data);
}
public bool Ping(byte[] opaqueData)
{
if (opaqueData == null || opaqueData.Length <= 0)
{
throw new ArgumentNullException("opaqueData");
}
connection.Connect();
var connectionStream = streamManager.Get(0);
var semaphoreWait = new Semaphore(0, 100);
var opaqueDataMatch = false;
Http2Stream.FrameReceivedDelegate frameRxAction;
frameRxAction = new Http2Stream.FrameReceivedDelegate(frame => {
var pf = frame as PingFrame;
if (pf != null)
{
opaqueDataMatch = pf.Ack && pf.OpaqueData != null && AltLinq.SequenceEqual(pf.OpaqueData, opaqueData);
semaphoreWait.Release();
}
});
// Wire up the event to listen for ping response
connectionStream.OnFrameReceived += frameRxAction;
// Construct ping request
var pingFrame = new PingFrame();
pingFrame.OpaqueData = new byte[opaqueData.Length];
opaqueData.CopyTo(pingFrame.OpaqueData, 0);
// Send ping
connection.QueueFrame(pingFrame);
// Wait for either a ping response or timeout
semaphoreWait.WaitOne();
// Cleanup the event
connectionStream.OnFrameReceived -= frameRxAction;
return(opaqueDataMatch);
}
