private void OnKeepAlive()
{
if (_keepAliveLocker.WaitOne(0))
{
try
{
if (State != WebSocketState.Open)
{
return;
}
if (_keepAliveTracker.ShouldSendKeepAlive())
{
var keepAliveFrame = new PingFrame().ToArray(_frameBuilder);
SendFrame(keepAliveFrame);
StartKeepAliveTimeoutTimer();
_keepAliveTracker.ResetTimer();
}
}
catch (Exception ex)
{
_log(ex.Message);
Close(WebSocketCloseCode.EndpointUnavailable);
}
finally
{
_keepAliveLocker.Release();
}
}
}
private async void OnKeepAlive()
{
if (await _keepAliveLocker.WaitAsync(0))
{
try
{
if (State != WebSocketState.Open)
{
return;
}
if (_keepAliveTracker.ShouldSendKeepAlive())
{
var keepAliveFrame = new PingFrame(false).ToArray(_frameBuilder);
await SendFrame(keepAliveFrame);
StartKeepAliveTimeoutTimer();
#if DEBUG
_log.DebugFormat("Session [{0}] sends server side ping frame [{1}].", this, string.Empty);
#endif
_keepAliveTracker.ResetTimer();
}
}
catch (Exception ex)
{
_log.Error(string.Format("Session [{0}] exception occurred, [{1}].", this, ex.Message), ex);
await Close(WebSocketCloseCode.EndpointUnavailable);
}
finally
{
_keepAliveLocker.Release();
}
}
}