|
private WriteInternalAsync ( ArraySegment |
||
| buffer | ArraySegment |
|
| count | ||
| isCompleted | System.Boolean | |
| headerSent | System.Boolean | |
| option | WebSocketFrameOption | |
| extensionFlags | WebSocketExtensionFlags | |
| cancellation | ||
| return | Task | |
internal override async Task StartPing()
{
_lastActivity = DateTime.Now.Add(_pingTimeout);
var pingInterval = TimeSpan.FromMilliseconds(Math.Max(500, _pingTimeout.TotalMilliseconds / 3));
var skipInterval = TimeSpan.FromMilliseconds(Math.Max(250, _pingTimeout.TotalMilliseconds / 2));
while (_connection.IsConnected)
{
await Task.Delay(pingInterval).ConfigureAwait(false);
try
{
var now = DateTime.Now;
if (_lastActivity < now.Subtract(_pingTimeout))
{
_connection.Close(WebSocketCloseReasons.GoingAway);
}
else if (_lastActivity < now.Subtract(skipInterval))
{
await _connection.WriteInternalAsync(_pingBuffer, 0, true, false, WebSocketFrameOption.Ping, WebSocketExtensionFlags.None, CancellationToken.None).ConfigureAwait(false);
}
}
catch (Exception ex)
{
Debug.Fail("BandwidthSavingPing.StartPing " + ex.Message);
_connection.Close(WebSocketCloseReasons.ProtocolError);
}
}
}
internal override async Task StartPing()
{
_lastPong = _lastActivity = DateTime.Now.Add(_pingTimeout);
_pingInterval = TimeSpan.FromMilliseconds(Math.Max(500, _pingTimeout.TotalMilliseconds / 2));
while (_connection.IsConnected)
{
await Task.Delay(_pingInterval).ConfigureAwait(false);
try
{
var now = DateTime.Now;
if (_lastActivity.Add(_pingTimeout) < now)
{
_connection.Close(WebSocketCloseReasons.GoingAway);
}
else
{
((UInt64)now.Ticks).ToBytes(_pingBuffer.Array, _pingBuffer.Offset);
await _connection.WriteInternalAsync(_pingBuffer, 8, true, false, WebSocketFrameOption.Ping, WebSocketExtensionFlags.None, CancellationToken.None).ConfigureAwait(false);
}
}
catch (Exception ex)
{
Debug.Fail("LatencyControlPing.StartPing " + ex.Message);
_connection.Close(WebSocketCloseReasons.ProtocolError);
}
}
}
public override async Task WriteAsync(byte[] buffer, int offset, int count, CancellationToken cancel)
{
if (_isFinished)
{
throw new WebSocketException("The write stream has been already flushed or disposed.");
}
RemoveUTF8BOM(buffer, ref offset, ref count);
while (count > 0)
{
BufferData(buffer, ref offset, ref count);
if (_internalUsedBufferLength == _webSocket.SendBuffer.Count && count > 0)
{
await _webSocket.WriteInternalAsync(_webSocket.SendBuffer, _internalUsedBufferLength, false, _isHeaderSent, _messageType, ExtensionFlags, cancel).ConfigureAwait(false);
_internalUsedBufferLength = 0;
_isHeaderSent = true;
}
}
}