Xceed FTP for .NET

Very small files downloaded "successfully", but empty

Leonard — Tue, 13 May 2008 22:10:52 GMT

Hello,

While evaluating the latest version of the FTP libary for .NET I came accross the following behaviour that can be simulated by following the steps down below. Please let me know if there's a fix available for this issue -

Problem: Very small files (1 - 2 charactes, or 4 bytes - for instance) are randomly downloaded empty, w/o errors being generated. The higher the connection speed to the FTP server, the higher the occurence rate. For an FTP server part of the LAN - we get about 15% of the files empty

How to reproduce the behaviour: (1) use a source FTP server with a high connection speed [I used FileZilla on a LAN server because I wanted to test implicit SSL]; (2) Have available on the FTP server several very small files, say 4 bytes each - we'll attempt to download them in a single session [I used 100 text files, each having just 2 characters as the body of the file] (3) download all these files locally, one at a time, by name - as part of the same session. You'll end up with about 15% of the files which are empty (size=0), and no errors raised on either end (server, or client).

Here's the code that I used to simulate the behaviour. Thanks for your help --

class TestConsole

{

static void Main(string[] args)

{

FtpClient ftpSession = new FtpClient();

ftpSession.TraceWriter = Console.Out;

ftpSession.CertificateReceived += new CertificateReceivedEventHandler(ftpSession_CertificateReceived);

int hostport = 990;

ftpSession.Connect("your FTPS Server IP address", hostport, AuthenticationMethod.Tls, VerificationFlags.None, null);

ftpSession.SendCustomCommand("PROT P");

ftpSession.Login("your user name", "your password");

ftpSession.ChangeCurrentFolder("upload");

ftpSession.ListingParsers.Clear();

ftpSession.ListingParsers.Add(new FtpUnixListingParser());

FtpItemInfoList items = ftpSession.GetFolderContents();

foreach (FtpItemInfo item in items)

{

if (item.Type == FtpItemType.File)

{

string dnloadRemoteName = item.Name + ".dload";

string dnloadLocalName = "c:\\temp\\" + dnloadRemoteName;

ftpSession.RenameFile(item.Name, dnloadRemoteName);

ftpSession.ReceiveFile(dnloadRemoteName, dnloadLocalName);

AbstractFile localFile = new DiskFile(dnloadLocalName);

if (localFile.Size > 0)

{

localFile.Name = localFile.Name + ".txt";

ftpSession.DeleteFile(dnloadRemoteName);

}

ftpSession.Disconnect();

ftpSession.CertificateReceived -= new CertificateReceivedEventHandler(ftpSession_CertificateReceived);

}

static void ftpSession_CertificateReceived(object sender, CertificateReceivedEventArgs e)

{

e.Action = VerificationAction.Accept;

}

READ ME: Latest notes and beta releases for Xceed FTP for .NET

Jb [Xceed] — Fri, 21 May 2010 13:14:47 GMT

Beta builds

From time to time, we will post beta builds of an upcoming service release here. We will do so if we feel the included bug fixes will affect and interest a significant number of clients.

You can be automatically notified of new beta builds by clicking the 'Enable Email Subscription' button above.

The beta builds are removed once they become the general release.

Although these builds are tested and fully functional, use them at your own risk. They are not full releases and only contain the component assemblies.

Below is a list of changes included in this beta build. If you're affected by one of the issues below, download the beta version to see if it resolves your issue:

Fixed a bug where the timeout value used was 30s when performing some commands e.g. Authenticate() even when the Timeout property was set to a different value. [154410]

No service release is scheduled at this time.

You can get the beta build for version 4.5, which targets the .NET framework 2.0/3.5 here: Xceed.Ftp.NET.4.5.13174.0.zip
You can get the beta build for version 5.3, which targets the .NET framework 4.0 here: Xceed.Ftp.NET.5.3.13174.0.zip

You can always get the official full release on the main website. But that release does not contain the fixes described here.

Known issues being worked on

None at this time.

Explanation of version numbers

Ftp.NET 4.5 Stable. For .NET Framework v2.0 to v3.5.
Ftp.NET 5.3 Exact same code as v4.5 but compiled for .NET Framework 4.0. Any bug in v4.5 is present is v5.3. Any bug fix in v4.5 will also fix v5.3.

Update history of this post

March 24th 2013: Posted build 13174.0 for 4.5 and 5.3 for issue [154410].
November 29th 2012: Posted build 12579.0 for 4.4 and 5.2 for issue [152957].
May 25th 2011: Posted build Xceed.Ftp.4.3.11275.0 and Xceed.Ftp.5.1.11275.0 for issue [143969].
June 10th 2010: Service release 4.0.10304.10260 posted on the main website on June 7th. Removed beta builds.
June 4th 2010: Posted build Xceed.Ftp.5.0.10304.0.
June 3rd 2010: Posted build Xceed.Ftp.4.2.10303.0 for issue 134310.
May 21th 2010: Posted build Xceed.Ftp.4.2.10270.0 for issue 133777.

Increase the "timeout" for FtpClient.GetFolderContents()

ganders — Thu, 28 Feb 2013 20:48:46 GMT

The directory that I'm executing this method on contains over 100K (100,000) files. It times-out while iterating over all of these files. I've updated my FtpClient.Timeout setting to 2 hours, but my job is still failing after ~900 seconds. Is there a different timeout property that I need to set, or do I need to set a KeepAliveInterval or something like that in order for this to continue iterating over the files in my directory?

Here's my stack trace information:

Xceed.Ftp.FtpTimeoutException: The FTP command execution timed-out.
   at Xceed.Ftp.Engine.FtpCommandSequence.EndExecute(IAsyncResult asyncResult)
   at Xceed.Ftp.FtpClient.DoExecuteCommand(FtpCommandChannel commandChannel, BaseFtpCommand command)
   at Xceed.Ftp.FtpClient.DoGetFolderContents(FtpCommandChannel commandChannel, ListFtpCommand listCommand)
   at Xceed.Ftp.FtpClient.GetFolderContents()
   at MVST.FTPArchiveUtility.Program.ProcessWatchLocation(FtpClient ftpClient, FTPWatchLocation wl) in C:\Vault\StandAloneApplications\MaintenanceApplications\MVST.FTPArchiveUtility\Program.cs:line 193
   at MVST.FTPArchiveUtility.Program.ProcessWatchLocation(FtpClient ftpClient, FTPWatchLocation wl) in C:\Vault\StandAloneApplications\MaintenanceApplications\MVST.FTPArchiveUtility\Program.cs:line 205
   at MVST.FTPArchiveUtility.Program.ProcessWatchLocation(FtpClient ftpClient, FTPWatchLocation wl) in C:\Vault\StandAloneApplications\MaintenanceApplications\MVST.FTPArchiveUtility\Program.cs:line 205
   at MVST.FTPArchiveUtility.Program.ProcessWatchLocations(FTPWatchLocation[] watchLocations) in C:\Vault\StandAloneApplications\MaintenanceApplications\MVST.FTPArchiveUtility\Program.cs:line 162

QuickFtp broken?

Richard — Thu, 21 Feb 2013 17:16:30 GMT

I'm trying to use the QuickFtp class to upload a number of files to a particular folder.

If I use the Send(string, int, string, string, string, string[]) overload, the files are uploaded, but they are not uploaded to the specified folder. Instead, the component creates a directory structure within the specified folder which mirrors the entire local path of the files.

If I use the Send(string, int, string, string, AuthenticationMethod, VerificationFlags, Certificate, DataChannelProtection, bool, string, bool, bool, bool, ISynchronizeInvoke, CertificateReceivedCallback, CertificateRequiredCallback, ByteProgressionCallback, ItemProgressionCallback, object, string[]) overload (the simplest overload which provides the "preservePaths" parameter!), I get an exception:

Xceed.Ftp.QuickFtpException: An error occurred while transfering file. 
---> Xceed.FileSystem.FileSystemInternalException: An unexpected internal failure occurred in the FileSystem component, or one of its descendants.
Type: Xceed.FileSystem.MultipleItemListFolder
FullName:  
---> System.NullReferenceException: Object reference not set to an instance of an object.
   at Xceed.Ftp.FtpFile..ctor(FtpConnection connection, String fullName)
   at Xceed.Ftp.FtpFolder.DoGetFile(FileSystemEventsSession session, String fileName)
   at Xceed.FileSystem.AbstractFolder.GetFileFromRelativeName(FileSystemEventsSession session, String relativeName)
   at Xceed.FileSystem.AbstractFolder.GetFile(FileSystemEvents events, Object userData, String relativeName)
   --- End of inner exception stack trace ---
   at Xceed.FileSystem.FileSystemEventsSession.OnPathException(Exception exception, String& path)
   at Xceed.FileSystem.AbstractFolder.GetFile(FileSystemEvents events, Object userData, String relativeName)
   at Xceed.FileSystem.AbstractFolder.GetFile(String relativeName)
   at Xceed.FileSystem.MultipleItemListFolder.BuildList(FileSystemEventsSession session, FileSystemItem destination, Boolean forward, Boolean recursive, Boolean includeFolders, Filter[] filters)
   at Xceed.FileSystem.AbstractFolder.CopyItemsTo(FileSystemEvents events, Object userData, AbstractFolder destinationFolder, Boolean recursive, Boolean includeFolders, Boolean replaceExistingFiles, Object[] filters)
   at Xceed.FileSystem.AbstractFolder.CopyFilesTo(FileSystemEvents events, Object userData, AbstractFolder destinationFolder, Boolean recursive, Boolean replaceExistingFiles, Object[] filters)
   at Xceed.Ftp.QuickFtp.DoSend(FtpConnection ftpConnection, String remoteDestinationFolder, Boolean replaceExistingFiles, Boolean recursive, Boolean preservePaths, CertificateReceivedCallback certificateReceivedCallback, CertificateRequiredCallback certificateRequiredCallback, ByteProgressionCallback byteProgressionCallback, ItemProgressionCallback itemProgressionCallback, Object userParams, String[] filesToSend)
   --- End of inner exception stack trace ---
   at Xceed.Ftp.QuickFtp.DoSend(FtpConnection ftpConnection, String remoteDestinationFolder, Boolean replaceExistingFiles, Boolean recursive, Boolean preservePaths, CertificateReceivedCallback certificateReceivedCallback, CertificateRequiredCallback certificateRequiredCallback, ByteProgressionCallback byteProgressionCallback, ItemProgressionCallback itemProgressionCallback, Object userParams, String[] filesToSend)
   at Xceed.Ftp.QuickFtp.Send(String hostname, Int32 port, String username, String password, AuthenticationMethod authenticationMethod, VerificationFlags verificationFlags, Certificate clientCertificate, DataChannelProtection dataChannelProtection, Boolean implicitAuthentication, String remoteDestinationFolder, Boolean replaceExistingFiles, Boolean recursive, Boolean preservePaths, ProxyClient proxy, Int32 timeout, Boolean passiveTransfer, RepresentationType defaultRepresentationType, TextWriter traceWriter, ISynchronizeInvoke synchronizingObject, CertificateReceivedCallback certificateReceivedCallback, CertificateRequiredCallback certificateRequiredCallback, ByteProgressionCallback byteProgressionCallback, ItemProgressionCallback itemProgressionCallback, Object userParams, TransferMode transferMode, String[] filesToSend)
   at Xceed.Ftp.QuickFtp.Send(String hostname, Int32 port, String username, String password, AuthenticationMethod authenticationMethod, VerificationFlags verificationFlags, Certificate clientCertificate, DataChannelProtection dataChannelProtection, Boolean implicitAuthentication, String remoteDestinationFolder, Boolean replaceExistingFiles, Boolean recursive, Boolean preservePaths, ProxyClient proxy, Int32 timeout, Boolean passiveTransfer, RepresentationType defaultRepresentationType, TextWriter traceWriter, ISynchronizeInvoke synchronizingObject, CertificateReceivedCallback certificateReceivedCallback, CertificateRequiredCallback certificateRequiredCallback, ByteProgressionCallback byteProgressionCallback, ItemProgressionCallback itemProgressionCallback, Object userParams, String[] filesToSend)
   at Xceed.Ftp.QuickFtp.Send(String hostname, Int32 port, String username, String password, AuthenticationMethod authenticationMethod, VerificationFlags verificationFlags, Certificate clientCertificate, DataChannelProtection dataChannelProtection, Boolean implicitAuthentication, String remoteDestinationFolder, Boolean replaceExistingFiles, Boolean recursive, Boolean preservePaths, ISynchronizeInvoke synchronizingObject, CertificateReceivedCallback certificateReceivedCallback, CertificateRequiredCallback certificateRequiredCallback, ByteProgressionCallback byteProgressionCallback, ItemProgressionCallback itemProgressionCallback, Object userParams, String[] filesToSend)

Ignoring the fact that I have to call a horrendous overload just to satisfy the most basic requirement, this exception would appear to be a serious bug in the FTP component.

Has anyone actually got the QuickFtp component to work properly?

.NET FTP Documentation

Randall — Fri, 08 Feb 2013 16:15:03 GMT

Hi,

Downloaded a trial copy of this product and installed it. Not able to find the help files for it ... there are some available for the ZIP components that came with it ... but I haven't had any luck adding those in Visual Studio help either. Any help would be appreciated.

Thx

On transferring a big file over an http proxy, FtpClient throws System.NullReferenceException or Xceed.Ftp.FtpTimeoutException

Noriyuki — Tue, 22 Jan 2013 03:16:59 GMT

Hi,

Our http proxy closes an ftp control port connection because no data is passing in the control port while a big file is being transferred on an ftp data port.

Even though the data port completes the data transporting successfully, FtpClient throws System.NullReferenceException or Xceed.Ftp.FtpTimeoutException.

The exception type is depends on the http proxy timeout setting value.

In that case above, No exception is preferable and FTPClient trying to recover the control port connection. (Rebex.Ftp library also throws an exception)

I struggled against the issue by making sure that the big file was 100% transferred in the FileTransferStatusEventHandler and when the exception was thrown and 100% transferred, ignored it and reconnected to the ftp server.

Any ideas?

Core FTP LE over our http proxy make it successful without no problem.

[Xceed.Ftp 4.5.13060.10140 FtpClient Setting]

FtpClient#SendFile method

Timeout = 600

KeepAliveInterval = 0

PassiveTransfer = true

RepresentationType = RepresentationType.Binary

[PC Environment]

Xceed .Ftp 4.5.13060.10140

VS2005 C#

.NET Framework 2.0.50727 SP2

Windows XP Pro SP3 x86

Here is the output log [http proxy timeout value is 180 seconds]

------------------------------------------------------------

2013-01-22 09:28:19,781 [INFO ] <--: 220 (vsFTPd 2.2.2)

2013-01-22 09:28:19,796 [INFO ] -->: USER ********

2013-01-22 09:28:19,812 [INFO ] <--: 331 Please specify the password.

2013-01-22 09:28:19,812 [INFO ] -->: PASS ********

2013-01-22 09:28:19,906 [INFO ] <--: 230 Login successful.

2013-01-22 09:28:19,921 [INFO ] -->: CWD /

2013-01-22 09:28:19,937 [INFO ] <--: 250 Directory successfully changed.

2013-01-22 09:28:19,937 [INFO ] -->: TYPE A

2013-01-22 09:28:19,953 [INFO ] <--: 200 Switching to ASCII mode.

2013-01-22 09:28:19,953 [INFO ] -->: PASV

2013-01-22 09:28:19,968 [INFO ] <--: 227 Entering Passive Mode (*,*,*,*,180,95).

2013-01-22 09:28:19,968 [INFO ] -->: LIST 0001*

2013-01-22 09:28:20,000 [INFO ] <--: 150 Here comes the directory listing.

2013-01-22 09:28:20,171 [INFO ] <--: 226 Directory send OK.

2013-01-22 09:28:20,250 [INFO ] <--: 0001 4,096 2013/01/11 17:50:00

2013-01-22 09:28:20,250 [INFO ] -->: CWD 0001

2013-01-22 09:28:20,265 [INFO ] <--: 250 Directory successfully changed.

2013-01-22 09:28:20,281 [INFO ] -->: TYPE A

2013-01-22 09:28:20,281 [INFO ] <--: 200 Switching to ASCII mode.

2013-01-22 09:28:20,281 [INFO ] -->: PASV

2013-01-22 09:28:20,296 [INFO ] <--: 227 Entering Passive Mode (*,*,*,*,207,93).

2013-01-22 09:28:20,296 [INFO ] -->: LIST Send*

2013-01-22 09:28:20,312 [INFO ] <--: 150 Here comes the directory listing.

2013-01-22 09:28:20,500 [INFO ] <--: 226 Directory send OK.

2013-01-22 09:28:20,500 [INFO ] <--: Send 4,096 2013/01/22 9:15:00

2013-01-22 09:28:20,500 [INFO ] -->: CWD Send

2013-01-22 09:28:20,515 [INFO ] <--: 250 Directory successfully changed.

2013-01-22 09:28:20,515 [INFO ] -->: TYPE I

2013-01-22 09:28:20,531 [INFO ] <--: 200 Switching to Binary mode.

2013-01-22 09:28:20,531 [INFO ] -->: PASV

2013-01-22 09:28:20,546 [INFO ] <--: 227 Entering Passive Mode (*,*,*,*,194,207).

2013-01-22 09:28:20,562 [INFO ] -->: STOR ftp4j-1.7.2.zip

2013-01-22 09:28:20,593 [INFO ] <--: 150 Ok to send data.

2013-01-22 09:28:20,593 [INFO ] 8,192/475,090,051 bytes, 0%, elapsed:00:00:00.0781250

2013-01-22 09:28:20,593 [INFO ] 16,384/475,090,051 bytes, 0%, elapsed:00:00:00.0781250

.....

2013-01-22 09:30:53,921 [INFO ] 475,090,051/475,090,051 bytes, 99%, elapsed:00:02:33.4062500

2013-01-22 09:30:53,937 [INFO ] 475,090,051/475,090,051 bytes, 100%, elapsed:00:02:33.4218750

2013-01-22 09:31:20,953 [WARN ] NullReferenceException has caught.

2013-01-22 09:31:20,968 [WARN ] Transferred: True

2013-01-22 09:31:20,968 [ERROR] Object reference not set to an instance of an object.

2013-01-22 09:31:20,968 [ERROR] System.NullReferenceException: Object reference not set to an instance of an object.

at Xceed.Ftp.Engine.FtpCommandSequence.EndExecute(IAsyncResult asyncResult)

at Xceed.Ftp.FtpClient.DoExecuteCommand(FtpCommandChannel commandChannel, BaseFtpCommand command)

at Xceed.Ftp.FtpClient.DoSendFile(FtpCommandChannel commandChannel, SendFileFtpCommandSequence sequence)

at Xceed.Ftp.FtpClient.SendFile(String localFilename, String remoteFilename, Boolean append)

at .....

2013-01-22 09:31:20,968 [WARN ] Connected: False

2013-01-22 09:31:20,968 [WARN ] Trying to reconnect...

2013-01-22 09:31:21,156 [INFO ] <--: 220 (vsFTPd 2.2.2)

2013-01-22 09:31:21,156 [INFO ] -->: USER ********

2013-01-22 09:31:21,171 [INFO ] <--: 331 Please specify the password.

2013-01-22 09:31:21,187 [INFO ] -->: PASS ********

2013-01-22 09:31:21,265 [INFO ] <--: 230 Login successful.

2013-01-22 09:31:21,281 [INFO ] -->: RNFR /0001/Send/ftp4j-1.7.2.zip

2013-01-22 09:31:21,296 [INFO ] <--: 350 Ready for RNTO.

2013-01-22 09:31:21,296 [INFO ] -->: RNTO /0001/Receive/ftp4j-1.7.2.zip

2013-01-22 09:31:21,328 [INFO ] <--: 250 Rename successful.

2013-01-22 09:31:21,359 [INFO ] -->: QUIT

2013-01-22 09:31:21,375 [INFO ] <--: 221 Goodbye.

------------------------------------------------------------

Here is the output log [http proxy timeout value is 600 seconds]

In the case on Xceed.Ftp.FtpTimeoutException, FtpClient#Connected is true.

So I tried to disconnect first.

------------------------------------------------------------

2013-01-22 12:09:50,625 [INFO ] 475,090,051/475,090,051 bytes, 99%, elapsed:00:02:36.3437500

2013-01-22 12:09:50,625 [INFO ] 475,090,051/475,090,051 bytes, 100%, elapsed:00:02:36.3437500

2013-01-22 12:10:20,515 [WARN ] FtpTimeoutException has caught.

2013-01-22 12:10:20,531 [WARN ] Transferred: True

2013-01-22 12:10:20,531 [ERROR] The FTP command execution timed-out.

2013-01-22 12:10:20,531 [ERROR] Xceed.Ftp.FtpTimeoutException: The FTP command execution timed-out.

at Xceed.Ftp.Engine.FtpCommandSequence.EndExecute(IAsyncResult asyncResult)

at Xceed.Ftp.FtpClient.DoExecuteCommand(FtpCommandChannel commandChannel, BaseFtpCommand command)

at Xceed.Ftp.FtpClient.DoSendFile(FtpCommandChannel commandChannel, SendFileFtpCommandSequence sequence)

at Xceed.Ftp.FtpClient.SendFile(String localFilename, String remoteFilename, Boolean append)

at .....

2013-01-22 12:10:20,531 [WARN ] Connected: True

2013-01-22 12:10:20,531 [INFO ] -->: QUIT

2013-01-22 12:10:50,546 [WARN ] Trying to reconnect...

2013-01-22 12:10:50,671 [INFO ] <--: 220 (vsFTPd 2.2.2)

2013-01-22 12:10:50,687 [INFO ] -->: USER ********

2013-01-22 12:10:50,703 [INFO ] <--: 331 Please specify the password.

2013-01-22 12:10:50,718 [INFO ] -->: PASS ********

2013-01-22 12:10:50,796 [INFO ] <--: 230 Login successful.

2013-01-22 12:10:50,812 [INFO ] -->: RNFR /0001/Send/ftp4j-1.7.2.zip

2013-01-22 12:10:50,828 [INFO ] <--: 350 Ready for RNTO.

2013-01-22 12:10:50,828 [INFO ] -->: RNTO /0001/Receive/ftp4j-1.7.2.zip

2013-01-22 12:10:50,984 [INFO ] <--: 250 Rename successful.

2013-01-22 12:10:51,125 [INFO ] -->: QUIT

2013-01-22 12:10:51,140 [INFO ] <--: 221 Goodbye.

------------------------------------------------------------

Using AbstractFolder to retrieve list of files

Ray — Sat, 26 Jan 2013 07:43:53 GMT

How do I modify the following code to retrieve all the files in a folder?

For example, to retrieve all xml files in the folder 'foo' and its sub-folders.

Dim instance As AbstractFolder
Dim recursive as Boolean = true
Dim filters() as object = "*.xml"
Dim value() as AbstractFile

value = instance.GetFiles(recursive, filters)

Get Files

Ray — Fri, 25 Jan 2013 01:28:13 GMT

How do you recursively get files on the server in all subfolders? Please provide an example written in vb.net.

Thanks

vsftpd NOOP command execution timed-out over http proxy

Noriyuki — Tue, 22 Jan 2013 02:01:47 GMT

Hi,

To vsftpd over http proxy, NOOP command is timed out and Xceed.Ftp.FtpTimeoutException is thrown

before "200 NOOP ok" reply comes.

To proftpd over http proxy, NOOP command ends successfully and no Exception is thrown.

[Xceed.Ftp 4.5.13060.10140 FtpClient Setting]

FtpClient#SendFile method

Timeout = 600

KeepAliveInterval = 20(in Http Proxy Setting Case1), 30(in Http Proxy Setting Case2)

PassiveTransfer = true

RepresentationType = RepresentationType.Binary

[Http Proxy Setting Case1]

Timeout = 180

Client-Proxy Keep-Alive = 10 seconds

Proxy-Internet Keep-Alive = 60 seconds

[Http Proxy Setting Case2]

Timeout = 600

Client-Proxy Keep-Alive = 30 seconds

Proxy-Internet Keep-Alive = 60 seconds

[vsftpd 2.2.2 Setting]

idle_session_timeout=600

data_connection_timeout=120

[PC Environment]

Xceed .Ftp 4.5.13060.10140

VS2005 C#

.NET Framework 2.0.50727 SP2

Windows XP Pro SP3 x86

Here is an output Log in Http Proxy Setting Case1

------------------------------------------------------------

2013-01-22 09:18:57,265 [INFO ] <--: 220 (vsFTPd 2.2.2)

2013-01-22 09:18:57,281 [INFO ] -->: USER ********

2013-01-22 09:18:57,296 [INFO ] <--: 331 Please specify the password.

2013-01-22 09:18:57,296 [INFO ] -->: PASS ********

2013-01-22 09:18:57,343 [INFO ] <--: 230 Login successful.

2013-01-22 09:18:57,343 [INFO ] -->: CWD /

2013-01-22 09:18:57,359 [INFO ] <--: 250 Directory successfully changed.

2013-01-22 09:18:57,359 [INFO ] -->: TYPE A

2013-01-22 09:18:57,375 [INFO ] <--: 200 Switching to ASCII mode.

2013-01-22 09:18:57,375 [INFO ] -->: PASV

2013-01-22 09:18:57,390 [INFO ] <--: 227 Entering Passive Mode (*,*,*,*,187,191).

2013-01-22 09:18:57,390 [INFO ] -->: LIST 0001*

2013-01-22 09:18:57,421 [INFO ] <--: 150 Here comes the directory listing.

2013-01-22 09:18:57,593 [INFO ] <--: 226 Directory send OK.

2013-01-22 09:18:57,671 [INFO ] <--: 0001 4,096 2013/01/11 17:50:00

2013-01-22 09:18:57,671 [INFO ] -->: CWD 0001

2013-01-22 09:18:57,687 [INFO ] <--: 250 Directory successfully changed.

2013-01-22 09:18:57,687 [INFO ] -->: TYPE A

2013-01-22 09:18:57,703 [INFO ] <--: 200 Switching to ASCII mode.

2013-01-22 09:18:57,703 [INFO ] -->: PASV

2013-01-22 09:18:57,718 [INFO ] <--: 227 Entering Passive Mode (*,*,*,*,205,124).

2013-01-22 09:18:57,718 [INFO ] -->: LIST Send*

2013-01-22 09:18:57,750 [INFO ] <--: 150 Here comes the directory listing.

2013-01-22 09:18:57,921 [INFO ] <--: 226 Directory send OK.

2013-01-22 09:18:57,921 [INFO ] <--: Send 4,096 2013/01/22 9:15:00

2013-01-22 09:18:57,921 [INFO ] -->: CWD Send

2013-01-22 09:18:57,937 [INFO ] <--: 250 Directory successfully changed.

2013-01-22 09:18:57,937 [INFO ] -->: TYPE I

2013-01-22 09:18:57,953 [INFO ] <--: 200 Switching to Binary mode.

2013-01-22 09:18:57,953 [INFO ] -->: PASV

2013-01-22 09:18:57,968 [INFO ] <--: 227 Entering Passive Mode (*,*,*,*,196,253).

2013-01-22 09:18:57,968 [INFO ] -->: STOR ftp4j-1.7.2.zip

2013-01-22 09:18:58,000 [INFO ] <--: 150 Ok to send data.

2013-01-22 09:18:58,015 [INFO ] 8,192/475,090,051 bytes, 0%, elapsed:00:00:00.0781250

2013-01-22 09:18:58,015 [INFO ] 16,384/475,090,051 bytes, 0%, elapsed:00:00:00.0781250

.....

2013-01-22 09:19:17,921 [INFO ] 62,390,272/475,090,051 bytes, 13%, elapsed:00:00:19.9843750

2013-01-22 09:19:17,921 [INFO ] 62,398,464/475,090,051 bytes, 13%, elapsed:00:00:19.9843750

2013-01-22 09:19:17,937 [INFO ] -->: NOOP

2013-01-22 09:19:47,015 [WARN ] FtpTimeoutException has caught.

2013-01-22 09:19:47,015 [WARN ] Transferred: False

2013-01-22 09:19:47,015 [ERROR] The FTP command execution timed-out.

2013-01-22 09:19:47,015 [ERROR] Xceed.Ftp.FtpTimeoutException: The FTP command execution timed-out.

at Xceed.Ftp.Engine.FtpCommandSequence.EndExecute(IAsyncResult asyncResult)

at Xceed.Ftp.FtpClient.DoExecuteCommand(FtpCommandChannel commandChannel, BaseFtpCommand command)

at Xceed.Ftp.FtpClient.DoSendFile(FtpCommandChannel commandChannel, SendFileFtpCommandSequence sequence)

at Xceed.Ftp.FtpClient.SendFile(String localFilename, String remoteFilename, Boolean append)

at .....

2013-01-22 09:19:47,031 [INFO ] <--: 226 Transfer complete.

2013-01-22 09:19:47,234 [INFO ] <--: 200 NOOP ok.

2013-01-22 09:19:55,343 [INFO ] -->: QUIT

2013-01-22 09:19:55,359 [INFO ] <--: 221 Goodbye.

------------------------------------------------------------

Parallel.ForEach with XCEED FTP

Wim — Thu, 13 Dec 2012 20:45:31 GMT

I want to execute parallel ftp jobs with parallel.ForEach task however when I run my program I get

Unhandled Exception: System.AggregateException: One or more errors occurred. ---> Xceed.Ftp.FtpInvalidStateException: Ca
nnot perform the requested operation because the FTP client is already connected to an FTP server.
   at Xceed.Ftp.FtpClient.SetState(FtpClientState newState)
   at Xceed.Ftp.AsyncFtpClient.BeginConnect(String hostName, Int32 port, AsyncCallback callback, Object state)
   at ParallelTest.Module1.DoIt(vwCompanyDivisionDevice data) in F:\PureAutomation\Projects\FixSus\Development\Samples\P

For each task I create a new ftpclient object

How to specify the port for the data transfer over FTPS

ganders — Thu, 03 Jan 2013 17:14:53 GMT

I'm trying to transfer a file to a customer's FTPS server, but it's trying to send the file via the data connection on a port that is outside the range that they will accept. How do I specify the range, or specific port to use for the data transfer?

I have a support license.

Is there a "SendCustomCommand" method for the FtpConnection class?

ganders — Thu, 27 Dec 2012 19:42:15 GMT

I see it's there for FtpClient, and want to do the same thing. I'm using FtpConnection because I need to do FTP over SSL (if FtpClient does FTP over SSL, that would be great, and please let me know)

Knowledge Base/Documentation center pages are getting 404 error

ganders — Fri, 04 Jan 2013 19:12:46 GMT

Here's one example:

http://doc.xceedsoft.com/products/XceedFileSystem/Xceed.FileSystem.v5.1~Xceed.FileSystem.FileSystemItem~CopyTo.html

To throw FTP connection exception

Arun — Thu, 04 Oct 2012 09:13:00 GMT

Hi,

We use Xceed FTP to connect to FTP.
While connecting to our client's FTP we sometimes never get response for a while from the server. so we decided to terminate the connection process after few second(eg:20 seconds).which is the best place to throw an exception after waiting for connection response for few seconds , in our code?

We have a method called Connect() in this class which we call from the App to connect.

Public

Function Connect() As Boolean

Try

_oAsyncFtpClient =

Nothing

_oAsyncFtpClient =

New AsyncFtpClient()

_oAsyncFtpClient.SynchronizingObject =

CType(_oSychronizingObject, System.ComponentModel.ISynchronizeInvoke)

_bAllFilesSent =

False

_bAllFilesReceived =

False

_sLog =

_bWasError =

False

If _sProxyAddress.Length = 0 Then

_oAsyncFtpClient.Proxy =

Nothing

Else

_oAsyncFtpClient.Proxy =

New HttpProxyClient(_sProxyAddress, _iProxyPort, _sProxyUserName, _sProxyPassword)

End If

If _bOptionSecureImplicit Then

_oAsyncFtpClient.BeginConnect(_sHostAddress, _iHostPort, AuthenticationMethod.Tls, VerificationFlags.None,

Nothing, _

New AsyncCallback(AddressOf Me.ConnectCompleted), Nothing)

Else

_oAsyncFtpClient.BeginConnect(_sHostAddress, _iHostPort,

New AsyncCallback(AddressOf Me.ConnectCompleted), Nothing)

End If

Catch x As Exception

HandleExceptions(

"An error occured while trying to connect to host. " & "Function:Connect", x, False)

End Try

End Function

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Private Sub ConnectCompleted(ByVal asyncResult As IAsyncResult)

Try

_oAsyncFtpClient.EndConnect(asyncResult)

if _bOptionSecureImplicit Then

Authenticate()

Else

End If

Catch x As Exception

HandleExceptions(

"An error occured while trying to connect to host. " & "Function:ConnectCompleted", x, False)

End Try

End Sub

Your help is much appreciated

Melbin

FTP(s) large files greater than 1GB: Error data channel timed out due to not meeting the minimum bandwidth requirement

ganders — Wed, 12 Sep 2012 18:01:27 GMT

I'm getting this error trying to FTPS a file that is approximately 1.5GB. I've cranked up the FTPClient timeout period to 14 hours, and set the KeepAliveInterval to 30 seconds. What else can I do to make this transfer go through?

Safe handle has been closed

Jocelyn — Thu, 22 Nov 2012 13:52:27 GMT

Hi,

I receive this error occasionally, but it doesn't give me the line number, so it's not easy to find where to fix the problem when tranferring files:

System.ObjectDisposedException: Safe handle has been closed at
Microsoft.Win32.Win32Native.SetEvent(SafeWaitHandle handle) at
System.Threading.EventWaitHandle.Set() at
Xceed.Utils.Threading.EventAsyncOperation.OperationCompleted() at
Xceed.Ftp.Engine.FtpDataConsumerCommand.<>c__DisplayClass1.<BeginProcessData>b__0(Object state) at
System.Threading._ThreadPoolWaitCallback.WaitCallback_Context(Object state) at
System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at
System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack) at
System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)

More verbose logging

ganders — Fri, 12 Oct 2012 15:57:40 GMT

Is there a way to get more verbose logging out of the FtpClient or FtpConnection objects? I'm setting the TraceWriter property, but was wondering if there's another setting to get more information.

Thanks

An SSL error occurred while sending a command

ganders — Fri, 05 Oct 2012 14:14:23 GMT

This is the error that I'm receiving, in the CertificateReceived event I am accepting the certificate no matter what, so why does this error come up on my Authenticate method call?

try

{

Console.Write("Attempting to authenticate the SSL certificate...");

xClient.Authenticate(Xceed.Ftp.AuthenticationMethod.Ssl, Xceed.Ftp.VerificationFlags.None, clientCert, Xceed.Ftp.DataChannelProtection.Private);

Console.WriteLine(" Certificate authentication succeeded.");

}

catch (Exception ex)

{

Console.WriteLine();

Console.WriteLine("Authentication failed: " + ex);

throw new Exception("An error occurred authenticating with the secure FTP server. " + ex.Message, ex);

}

// The Status argument property tells you if the server certificate was accepted based on the VerificationFlags you provided.

if (e.Status != Xceed.Ftp.VerificationStatus.ValidCertificate)

{

Console.WriteLine("The server certificate is invalid: {0}", e.Status.ToString());

Console.WriteLine(e.ServerCertificate.ToString());

// Even though this certificate is not valid, we are going to accept it because we at least received one.

// In the future, if we want to get more technical about the certificates, this is the place to check the

// details about the invalid cert.

e.Action = Xceed.Ftp.VerificationAction.Accept;

}

else

Console.WriteLine("Valid certificate received from server.");

Stack Trace:

Authentication failed: Xceed.Ftp.FtpSslException: An SSL error occurred while sending a command. ---> Xceed.Utils.Security.SecurityException: An error occured while communicating with the remote host. ---> Xceed.Utils.Security.Ssl.Shared.SslException: The other side has sent a failure alert.
   at Xceed.Utils.Security.Ssl.Shared.HandshakeLayer.ProcessAlert(RecordMessage message)
   at Xceed.Utils.Security.Ssl.Shared.HandshakeLayer.ProcessMessages(RecordMessage message)
   at Xceed.Utils.Security.Ssl.Shared.RecordLayer.ProcessBytes(Byte[] buffer, Int32 offset, Int32 size)
   at Xceed.Utils.Security.Ssl.Shared.SocketController.OnReceive(IAsyncResult ar)
   --- End of inner exception stack trace ---
   at Xceed.Utils.Security.Ssl.SecureSocket.EndSend(IAsyncResult asyncResult)
   at Xceed.Utils.Security.Ssl.SecureSocket.Send(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
   at Xceed.Ftp.Engine.FtpCommandChannel.SendString(String command)
   --- End of inner exception stack trace ---
   at Xceed.Ftp.Engine.FtpCommandSequence.EndExecute(IAsyncResult asyncResult)
   at Xceed.Ftp.FtpClient.Authenticate(FtpCommandChannel commandChannel, AuthenticationFtpCommand authCommand, DataChannelProtectionFtpCommand protCommand)
   at Xceed.Ftp.FtpClient.Authenticate(AuthenticationMethod authenticationMethod, VerificationFlags verificationFlags, Certificate clientCertificate, DataChannelProtection dataProtection)
   at

Does the .net FTP library support EPSV (extended passive mode)?

walkaboutsd — Wed, 31 Oct 2012 17:15:31 GMT

We currently use the library but we are going to be connecting with a new partner that will require FTP EPSV. I cannot find anything in the documentation that references this type of connection mode. And we are not currently able to simply test against their servers.

XCeed FTP ver 2.0 with .NET 3.5 App

Kermit — Thu, 08 Nov 2012 17:38:29 GMT

Will version 2.0 of XCeed FTP work with a .NET 3.5 application? We have an old .NET 1.1 application that utilizes the XCeed FTP 2.0 component, and I need to upgrade that application to a newer .NET Framework version that is supported under Windows 8.

I've converted the app, and when I run the FTP-related portion of it, from the FileTransferStatus() subroutine there is generated the error message "Cross-thread operation not valid; Control 'lblInProgress' accessed from a thread other than the thread it was created on."

Thanks for any help anyone can provide.

Xceed.Ftp.FtpIOException error even though the inner exception says it succeeded.

ganders — Tue, 20 Nov 2012 19:41:00 GMT

This appears to be a bug in the Xceed.Ftp code:

Upload failed: Xceed.Ftp.FtpIOException: An error occurred while reading from or writing to the data channel. ---> System.IO.IOException: An I/O exception occurred. ---> System.Net.Sockets.SocketException: The operation completed successfully
   at Xceed.Utils.Security.Ssl.SecureSocket.BeginSend(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags, AsyncCallback callback, Object state)
   at Xceed.Utils.Security.Ssl.SecureSocket.Send(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
   at Xceed.Utils.Security.Ssl.SecureNetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size)
   --- End of inner exception stack trace ---
   at Xceed.Utils.Security.Ssl.SecureNetworkStream.Write(Byte[] buffer, Int32 offset, Int32 size)
   at Xceed.Ftp.Engine.FtpDataConsumerCommand.QueuedCopyStream(Object state)
   --- End of inner exception stack trace ---
   at Xceed.Ftp.Engine.FtpCommandSequence.EndExecute(IAsyncResult asyncResult)
   at Xceed.Ftp.FtpClient.SendFile(FtpCommandChannel commandChannel, SendFileFtpCommandSequence sendSequence)
   at Xceed.Ftp.FtpClient.SendFile(String localFilename)

Problem connecting to SFTP Server

Joerg — Tue, 13 Mar 2007 22:20:11 GMT

Hi,

Given the following code:

FtpClient ftpClient = new FtpClient();

ftpClient.PassiveTransfer = false;
ftpClient.Connect(
"HOSTNAME", 22,
AuthenticationMethod.Ssl,
VerificationFlags.None,
null);

I always get the exception "The command socket was disconnected from the FTP server." The connection to the systems works fine using another SFTP client.
Using PassiveTransfer = true makes no difference.

Thanks for any help!

Sincerely

Joerg Fischer

Visual Studio 2012 Not Supported

Daniel — Sat, 29 Sep 2012 10:07:52 GMT

Warning 67 The primary reference "Xceed.Ftp.v5.1" could not be resolved because it has an indirect dependency on the .NET Framework assembly "System.Runtime.Serialization.Formatters.Soap, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" which has a higher version "4.0.0.0" than the version "2.0.0.0" in the current target framework.

Suddenly getting error during ssl connection

Chad — Tue, 18 Sep 2012 14:40:36 GMT

We have a program that has been working for almost two year and sudddenly it has stopped and we are getting a message that "Certificate does not have a subject relative distinguished name."

Anyone have any idea why this is happening.

Example of connecting to FTP server over SSL

ganders — Tue, 21 Aug 2012 20:14:52 GMT

I'm using Xceed FTP for .NET v3.6

I've read throught the documentation and found out that in order to connect to FTP server via SSL, just use one of the overloads in the Connect() method. But the last parameter says it needs the Xceed.Ftp.Certificate object. I then try and create one and it says the object has no constructor.

How do I go about getting my cert object created? My cert is in the format of:

xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx

FTPS and SFTP

José — Fri, 20 Jul 2012 09:25:35 GMT

from your documentation ( http://doc.xceedsoft.com/products/XceedFileSystem/) we go this:

As of version 2.0, Xceed FTP for .NET supports both SSL 3.0 and TLS (SSL 3.1). SSL and TLS are protocols layered above connection protocols (such as TCP /IP ) but beneath application protocols (such as FTP) that provide encrypted, authenticated communications between a client and a server. Note: Secure FTP is not supported by Xceed FTP for .NET Compact Framework.

on first setence is said what xceed ftp suports (ssl3 and ssl3.1) - which lead me to supose that this excludes SFTP - but then in last line it's written that does not suport Secure FTP to .net compact edition.
Does xceed suports SFTP (over ssh) for .net but not for compact framework version? Or when Secure FTP (refering to the bold setence) is in fact refering to FTPS protocol?

Secure Connection FtpSslException

Rajkumar — Wed, 30 May 2012 15:15:11 GMT

Hi,

We are using Xceed FTP for long time. It was working fine until the last week. We updated our XCeed FTP to latest Xceed FTP.v5.1 version after that it does not connect to secure ftp's. Even on CertificateReceived handler we accept the e.Action = VerificationAction.Accept; if it is invalid certificate.

Is there any changed on newer version? i don't see any changes on documentation also.

here the sample code for you..

fc = new Xceed.Ftp.FtpClient();

fc.CertificateReceived += new CertificateReceivedEventHandler(fc_CertificateReceived);

fc.CommandSent += new CommandSentEventHandler(fc_CommandSent);

fc.ReplyReceived += new ReplyReceivedEventHandler(fc_ReplyReceived);

fc.StateChanged += new EventHandler(fc_StateChanged);

fc.FileTransferStatus += new FileTransferStatusEventHandler(fc_FileTransferStatus);

fc.ParsingListingLine += new ParsingListingLineEventHandler(fc_ParsingListingLine);

fc.RepresentationType = RepresentationType.Ascii;

int ftpPortNo = string.IsNullOrEmpty(portno.Trim()) ? 0 : int.Parse(portno.Trim());

//implicit secure ftp default port no #990

if (IsSecured && ftpPortNo == 0) ftpPortNo = 990;

//implicit ftp default port no #21

if (!IsSecured && ftpPortNo == 0) ftpPortNo = 21;

FTPLog(string.Format("Trying to connect with ftpaddress:{0}, portno#{1}...",ftpaddr,ftpPortNo));

if (IsSecured)

fc.Connect(ftpaddr, ftpPortNo,AuthenticationMethod.Tls,VerificationFlags.None,null);

else

fc.Connect(ftpaddr, ftpPortNo);

and the certificatereceived handler

private void fc_CertificateReceived(object sender, CertificateReceivedEventArgs e)

{

if (e.Status != VerificationStatus.ValidCertificate)

{

e.Action = VerificationAction.Accept;

}

After the latest version of Xceed FTP it broken live now. Need a thought to fix it.

here is the error..

Message: FTP State Changed: Connecting

Message: FTP State Changed: NotConnected

Message: Xceed.Ftp.FtpException: A Xceed.Ftp.FtpSslException occurred while receiving a reply. Please see and report the value of the InnerException property, which contains the actual exception and stack trace. ---> Xceed.Ftp.FtpSslException: SslStream authentication failed. Possible causes: 1) The server requires a certificate in order to connect and none was provided. 2) The certificate provided was rejected by the .NET framework/Windows (usually because it doesn't contain a private key). 3) The certificate provided was rejected by the server. ---> System.ArgumentException: The verification status is invalid.

Parameter name: status

at Xceed.Ftp.CertificateReceivedEventArgs..ctor(Certificate certificate, VerificationFlags flags, VerificationStatus status)

at Xceed.Ftp.Engine.FtpCommandChannel.OnServerCertificateValidationCallback(Object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors sslPolicyErrors)

at System.Net.Security.SecureChannel.VerifyRemoteCertificate(RemoteCertValidationCallback remoteCertValidationCallback)

at System.Net.Security.SslState.CompleteHandshake()

at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)