/// <summary>
/// 消息到达
/// </summary>
/// <param name="sender"></param>
/// <param name="connId"></param>
/// <param name="final"></param>
/// <param name="opCode"></param>
/// <param name="mask"></param>
/// <param name="data"></param>
/// <returns></returns>
public HandleResult OnMessage(IWebSocketServer sender, IntPtr connId, bool final, OpCode opCode, byte[] mask, byte[] data)
{
Console.WriteLine($"OnMessage({connId}), final: {final}, op code: {opCode}, data length: {data.Length}");
var ok = sender.Text(connId, $"这里只是一个欢迎页面, 只是欢迎您, 您可以连接到 {(sender.IsSecure ? "wss" : "ws")}://{sender.Uri.Host}:{sender.Uri.Port}/echo");
return(ok ? HandleResult.Ok : HandleResult.Error);
}