protected override void Dispose(bool disposing)
{
try
{
if (!_disposed)
{
_disposed = true;
if (_currentUser != null)
{
if (_currentUser.IsAnonymous)
{
_performanceCounter.DecrementAnonymousUsers();
}
else
{
_performanceCounter.DecrementNonAnonymousUsers();
}
}
if (_connected)
{
_performanceCounter.DecrementCurrentConnections();
}
if (disposing)
{
if (_dataClient != null)
{
_dataClient.Close();
_dataClient = null;
}
if (_sslStream != null)
{
_sslStream.Dispose();
_sslStream = null;
}
}
}
}
finally
{
FtpLogEntry logEntry = new FtpLogEntry()
{
Date = DateTime.Now,
Info = LogInfo.ConnectionTerminated.ToString()
};
OnLog(logEntry);
var serverConnInfos = ((FtpServer)CurrentServer).ConnectionInfos;
if (serverConnInfos.Contains(ConnectionInfo))
{
serverConnInfos.Remove(ConnectionInfo);
}
serverConnInfos.RemoveAll(t => t.ID == this.ID);
base.Dispose(disposing);
}
}
protected override void OnCommandComplete(Command cmd)
{
if (cmd.Code == "AUTH")
{
try
{
//Write(GetResponse(FtpResponses.ENABLING_TLS));
//MARK:建立TLS连接
_cert = ((FtpServer)CurrentServer).ServerCertificate;
_sslStream = new GnuSslStream(ControlStream);
_sslStream.ReadTimeout = 5000;
_sslStream.WriteTimeout = 5000;
_sslStream.AuthenticateAsServer(_cert, false, SslProtocols.Tls, true);
_sslEnabled = true;
}
catch (AuthenticationException exception)
{
_sslEnabled = false;
//throw;
}
catch (ArgumentNullException exception)
{
_sslEnabled = false;
}
}
_performanceCounter.IncrementCommandsExecuted();
}
private void DoDataConnectionOperation(IAsyncResult result)
{
_performanceCounter.IncrementTotalConnectionAttempts();
_performanceCounter.IncrementCurrentConnections();
//由BeginConnect异步调用，因此需要EndConnect，EndConnect需要使用【对应的】IAsyncResult作为参数
HandleAsyncResult(result);
//取出我们传入的真正需要的DataConnectionOperation结构，内含本次要执行的方法与参数
DataConnectionOperation op = result.AsyncState as DataConnectionOperation;
Response response;
try
{
if (_dataClient == null)
{
throw new SocketException();
}
//通过上述异步过程，此时的_dataClient已经连接
if (_protected)
{
using (GnuSslStream dataStream = new GnuSslStream(_dataClient.GetStream(), false))
{
try
{
dataStream.AuthenticateAsServer(_cert, false, SslProtocols.Tls, true);
response = op.Operation(dataStream, op.Arguments);
}
catch (Exception)
{
response = GetResponse(FtpResponses.UNABLE_TO_OPEN_DATA_CONNECTION);
//throw;
}
dataStream.Close();
//response = op.Operation(dataStream, op.Arguments);
}
}
else
{
using (NetworkStream dataStream = _dataClient.GetStream())
{
response = op.Operation(dataStream, op.Arguments);
}
}
}
catch (Exception ex)
{
_log.Error(ex);
response = GetResponse(FtpResponses.TRANSFER_ABORTED);
}
if (_dataClient != null)
{
_dataClient.Close();
_dataClient = null;
}
_performanceCounter.DecrementCurrentConnections();
if (_dataConnectionType == DataConnectionType.Passive)
{
PassiveListenerPool.FreeListener(_passiveListener);
}
Write(response.ToString());
}