public async Task <bool> Ping(byte[] opaqueData, CancellationToken cancelToken)
{
if (opaqueData == null || opaqueData.Length <= 0)
{
throw new ArgumentNullException("opaqueData");
}
await connection.Connect();
var semaphoreWait = new SemaphoreSlim(0);
var opaqueDataMatch = false;
var connectionStream = await streamManager.Get(0);
Http2Stream.FrameReceivedDelegate frameRxAction;
frameRxAction = new Http2Stream.FrameReceivedDelegate(frame => {
var pf = frame as PingFrame;
if (pf != null)
{
opaqueDataMatch = pf.Ack && pf.OpaqueData != null && pf.OpaqueData.SequenceEqual(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
await connection.QueueFrame(pingFrame);
// Wait for either a ping response or timeout
await semaphoreWait.WaitAsync(cancelToken);
// Cleanup the event
connectionStream.OnFrameReceived -= frameRxAction;
return(opaqueDataMatch);
}
public async Task<bool> Ping (byte[] opaqueData, CancellationToken cancelToken)
{
if (opaqueData == null || opaqueData.Length <= 0)
throw new ArgumentNullException ("opaqueData");
await connection.Connect ();
var semaphoreWait = new SemaphoreSlim (0);
var opaqueDataMatch = false;
var connectionStream = await streamManager.Get (0);
Http2Stream.FrameReceivedDelegate frameRxAction;
frameRxAction = new Http2Stream.FrameReceivedDelegate (frame => {
var pf = frame as PingFrame;
if (pf != null) {
opaqueDataMatch = pf.Ack && pf.OpaqueData != null && pf.OpaqueData.SequenceEqual (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
await connection.QueueFrame (pingFrame);
// Wait for either a ping response or timeout
await semaphoreWait.WaitAsync (cancelToken);
// Cleanup the event
connectionStream.OnFrameReceived -= frameRxAction;
return opaqueDataMatch;
}
