FtpClient.Disconnect does not return

Aspose.Email Product Family
1

Hi Forum,

I use Aspose.Network for uploading files to a FTP Server. This works fine but sometimes the Disconnect methods seems not to return.
I tried setting Command and Data timeouts but without any effect. Also i tried assigning TransferBroken and Complete Eventhanlder to check if there is a problem but the upload always fnishes but the Disconnect method is the last heartbeat I can see in the logs.

Aspose.Network 5.8.0.0
Windows XP SP3 running my console application.

Ftp Client Init

Aspose.Network.Ftp.FtpClient lClient = new Aspose.Network.Ftp.FtpClient(ConfigurationManager.AppSettings.Get(“FtpServer”), ConfigurationManager.AppSettings.Get(“FtpUserName”), ConfigurationManager.AppSettings.Get(“FtpPassword”));

lClient.DataReceiveTimeout = 5000;
lClient.DataSendTimeout = 5000;
lClient.CommandReceiveTimeout = 5000;
lClient.CommandSendTimeout = 5000;
lClient.DataConnectionMode = DataConnectionMode.Passive;

lClient.TransferBroken += TransferBrokenEvent;
lClient.TransferCompleted += TransferCompleteEvent;
lClient.TransferProgress += TransferProgressEvent;

lClient.Connect(true);

log.Debug(“UploadMonitor.NewExportFolderListAvailable(): FTP Logged in. Transfer starting…”);
lClient.TransferType = Aspose.Network.Ftp.TransferType.Binary;
lClient.UploadMultiFiles(current.FullName, “.”, true);
log.Debug(“UploadMonitor.NewExportFolderListAvailable(): FTP Transfer complete.”);
if (lClient.Connected)
{
log.Debug(“UploadMonitor.NewExportFolderListAvailable(): Invoke disconnect.”);
lClient.Disconnect();
log.Debug(“UploadMonitor.NewExportFolderListAvailable(): Done.”);
}
else
{
log.Debug(“UploadMonitor.NewExportFolderListAvailable(): Already disconnected.”);
}
log.Debug(“UploadMonitor.NewExportFolderListAvailable(): FTP Connection closed.”);

All this happens inside a try/catch but no exception is thrown.
All this happens inside a foreach loop, could it be that i have to null the instance of the ftp client?

2

Update, tried this with the latest Aspose.Network version 6.4.0.0 but this did not change behavior.

3

The target FTP Server is vsFTPd 2.0.7. running under Debian

4

Hi,

Thank you for inquiry.

Could you please try to move the Disconnect() call to the finally block and see if it works this way?

FtpClient lClient = null;

try
{
// initialize, connect, upload, download etc
}
catch(Exception ex)
{
// handle exception
}
finally
{
lClient.Disconnect();
lClient.Dispose(); // try adding this too
}

5

Hi,

thanks for your reply. Disposing the Client did the trick. So far the error did not reoccur.

Thanks
Karl