/// <summary>
/// callback from WebSocket after socket is closed
/// clean up and error reporting
/// </summary>
/// <param name="sender">The sender object.</param>
/// <param name="e">Event arguments.</param>
private void OnSocketClose(object sender, WebSocketProtocolEventArgs e)
{
// if WebSocket initiated close by itself, SMProtocol is not aware yet
// In this case this.opened will be true and SMProtocol is forced to close
if (this.webSocket.LastError != null)
{
if (this.OnError != null)
{
// General error state, do not attempt to communicate
this.OnError(this, new SMProtocolErrorEventArgs(this.webSocket.LastError));
}
else
{
// fallback to notify user anyhow
Console.WriteLine("ERROR: WebSocket error {0}", this.webSocket.LastError);
}
}
else
{
try
{
if (e.BinaryData != null)
{
// We received WS close frame from server with extension data.
// Attempt to unpack the data
CloseFrameExt closeData = this.serializer.DeserializeCloseFrameExt(e.BinaryData);
if (this.OnClose != null)
{
// Send unpacked extension data to event listener
this.OnClose(this, new CloseFrameEventArgs(closeData));
}
}
else
{
// We received WS close frame without extension data. If may be
// response to our frame. Or it may be server initiated by server.
if (this.OnClose != null)
{
this.OnClose(this, null);
}
}
// this object is now closed
this.opened = false;
}
catch (Exception protocolError)
{
if (this.OnError != null)
{
this.OnError(this, new SMProtocolErrorEventArgs(protocolError));
}
}
finally
{
// in any case, close WS socket
this.CloseInternal();
}
}
}
/// <summary>
/// Deserializes the Http2 Close Extension Data.
/// </summary>
/// <param name="data">The data.</param>
/// <returns>Deserialized Extension Data.</returns>
public CloseFrameExt DeserializeCloseFrameExt(byte[] data)
{
var extData = new CloseFrameExt();
extData.StatusCode = BinaryHelper.Int16FromBytes(data[0], data[1], 0);
extData.LastGoodSessionId = BinaryHelper.Int32FromBytes(new ArraySegment <byte>(data, 2, 4));
return(extData);
}
/// <summary>
/// Initializes a new instance of the <see cref="CloseFrameEventArgs"/> class.
/// </summary>
/// <param name="frameExt">The Http Close frame extension data.</param>
public CloseFrameEventArgs(CloseFrameExt frameExt)
{
this.FrameExt = frameExt;
}
