Cyberduck
Mountain Duck
CLIOpened on Oct 29, 2013 at 2:10:35 PM
Closed on Oct 31, 2013 at 1:21:33 PM
Last modified on Nov 18, 2013 at 4:50:56 PM
#7522 closed defect (fixed)
Interoperability with WinSSHD. "Unknown File not found" error.
| Reported by: | chris nolan | Owned by: | dkocher |
|---|---|---|---|
| Priority: | normal | Milestone: | 4.4.1 |
| Component: | sftp | Version: | 4.4 |
| Severity: | major | Keywords: | |
| Cc: | Architecture: | Intel | |
| Platform: | Windows 7 |
Description
Since updating to version 4.4, I have not been able to upload a file to my SFTP server. Downloads work properly.
Whenever I attempt to upload a file, I get an Error box that just says "Unknown File not found." It provides a try again button, but this repeats the failure. Looking at the SFTP server, I just see the successful connection, but no attempted transfer. This happens whether I upload by clicking the Upload button or by dragging and dropping the file onto the window.
The Log Drawer doesn't seem to have anything helpful, but here it is:
SSH_FXP_OPENDIR SSH_FXP_HANDLE SSH_FXP_READDIR SSH_FXP_NAME drwxrwx--- 1 no-user no-group 0 Jan 1 1970 .. -rwxrwx--- 1 no-user no-group 12292 Sep 26 2011 .DS_Store drwxrwx--- 1 no-user no-group 0 Dec 1 2009 .Spotlight-V100 drwxrwx--- 1 no-user no-group 0 Dec 1 2009 .Trash drwxrwx--- 1 no-user no-group 0 Oct 28 18:43 Dropbox -rwxrwx--- 1 no-user no-group 202518 Oct 29 13:55 ORIGreport.csv drwxrwx--- 1 no-user no-group 0 Sep 23 23:13 WINDOWS SSH_FXP_READDIR SSH_FXP_STATUS SSH_FXP_CLOSE SSH_FXP_STATUS
After the download fails, the Transfer window displays "Upload Complete 0 B of 0 B" and a green circle.
It appears that replacing an existing file works properly, but uploading a new file causes this problem.
I can provide other logs or diagnostic help if needed. The SFTP server is WinSSHD v 5.26. Uploads worked prior to the update to 4.4 and other SFTP clients are still uploading successfully.
After several retries, I was able to get one file to successfully upload, but I have not been able to reproduce this success.
Attachments (3)
Change History (17)
comment:1 Changed on Oct 29, 2013 at 2:23:41 PM by chris nolan
- Component changed from core to sftp
- Owner set to dkocher
comment:2 Changed on Oct 29, 2013 at 3:55:35 PM by dkocher
- Milestone set to 4.4.1
- Owner changed from dkocher to yla
comment:3 Changed on Oct 29, 2013 at 8:24:31 PM by dkocher
comment:4 Changed on Oct 29, 2013 at 8:25:33 PM by dkocher
- Summary changed from "Unknown File not found" error when uploading via SFTP to "Unknown File not found" error
Changed on Oct 29, 2013 at 8:40:16 PM by chris nolan
comment:5 Changed on Oct 29, 2013 at 8:42:48 PM by chris nolan
Log uploaded. In the interest of a clean log, here is the process I used: I renamed my original log, then opened Cyberduck 4.3, successfully uploaded a file, upgraded to 4.4, then tried to upload a new file and failed.
I will also upload the original log which has many more examples of failures, but also some successes due to downgrading to to 4.3 for testing.
Changed on Oct 29, 2013 at 8:43:11 PM by chris nolan
comment:6 Changed on Oct 29, 2013 at 9:26:24 PM by dkocher
Thanks for providing the logs. Would it be possible for you to enable debug logging which will reveal the cause of this exception.
Changed on Oct 29, 2013 at 10:15:44 PM by chris nolan
comment:7 Changed on Oct 30, 2013 at 1:46:51 PM by dkocher
Thanks for the debug log.
comment:8 Changed on Oct 30, 2013 at 6:07:28 PM by dkocher
- Owner changed from yla to dkocher
- Status changed from new to assigned
- Summary changed from "Unknown File not found" error to Interoperability with WinSSHD. "Unknown File not found" error.
856 2013-10-29 17:28:01,957 [background-1] INFO ch.cyberduck.core.Session - /U/attach_1.pdf 857 2013-10-29 17:28:01,957 [background-1] INFO ch.cyberduck.core.Session - SSH_FXP_OPENDIR 858 2013-10-29 17:28:01,973 [Thread-0] DEBUG Ch.Cyberduck.Core.Local.LocalImpl - File C:\Users\Chris\Desktop\attach_1.pdf exists 859 2013-10-29 17:28:01,993 [Thread-0] DEBUG Ch.Cyberduck.Core.Local.LocalImpl - File C:\Users\Chris\Desktop\attach_1.pdf exists 860 2013-10-29 17:28:02,006 [background-1] INFO ch.cyberduck.core.Session - SSH_FXP_HANDLE 861 2013-10-29 17:28:02,006 [background-1] INFO ch.cyberduck.core.Session - SSH_FXP_READDIR 862 2013-10-29 17:28:02,008 [Thread-0] DEBUG Ch.Cyberduck.Core.Local.LocalImpl - File C:\Users\Chris\Desktop\attach_1.pdf exists 863 2013-10-29 17:28:02,036 [Thread-0] DEBUG Ch.Cyberduck.Core.Local.LocalImpl - File C:\Users\Chris\Desktop\attach_1.pdf exists 864 2013-10-29 17:28:02,058 [background-1] INFO ch.cyberduck.core.Session - SSH_FXP_NAME 865 2013-10-29 17:28:02,058 [background-1] INFO ch.cyberduck.core.Session - drwxrwx--- 1 no-user no-group 0 Jan 1 1970 .. 866 2013-10-29 17:28:02,058 [background-1] INFO ch.cyberduck.core.Session - -rwxrwx--- 1 no-user no-group 12292 Sep 26 2011 .DS_Store 867 2013-10-29 17:28:02,058 [background-1] INFO ch.cyberduck.core.Session - drwxrwx--- 1 no-user no-group 0 Dec 1 2009 .Spotlight-V100 868 2013-10-29 17:28:02,058 [background-1] INFO ch.cyberduck.core.Session - drwxrwx--- 1 no-user no-group 0 Dec 1 2009 .Trash 869 2013-10-29 17:28:02,058 [background-1] INFO ch.cyberduck.core.Session - -rwxrwx--- 1 no-user no-group 35097 Oct 29 20:36 barrie.png 870 2013-10-29 17:28:02,058 [background-1] INFO ch.cyberduck.core.Session - drwxrwx--- 1 no-user no-group 0 Oct 29 21:16 Dropbox 871 2013-10-29 17:28:02,058 [background-1] INFO ch.cyberduck.core.Session - drwxrwx--- 1 no-user no-group 0 Sep 23 23:13 WINDOWS 872 2013-10-29 17:28:02,058 [background-1] INFO ch.cyberduck.core.Session - SSH_FXP_READDIR 873 2013-10-29 17:28:02,098 [Thread-0] DEBUG Ch.Cyberduck.Core.Local.LocalImpl - File C:\Users\Chris\Desktop\attach_1.pdf exists 874 2013-10-29 17:28:02,118 [background-1] INFO ch.cyberduck.core.Session - SSH_FXP_STATUS 875 2013-10-29 17:28:02,118 [background-1] INFO ch.cyberduck.core.Session - SSH_FXP_CLOSE 876 2013-10-29 17:28:02,161 [Thread-0] DEBUG Ch.Cyberduck.Core.Local.LocalImpl - File C:\Users\Chris\Desktop\attach_1.pdf exists 877 2013-10-29 17:28:02,174 [background-1] INFO ch.cyberduck.core.Session - SSH_FXP_STATUS 878 2013-10-29 17:28:02,174 [background-1] INFO ch.cyberduck.core.Cache - Caching 2-/U 879 2013-10-29 17:28:02,175 [background-1] DEBUG Ch.Cyberduck.Core.I18n.LocaleImpl - Caching bundle Error 880 2013-10-29 17:28:02,177 [background-1] WARN ch.cyberduck.core.threading.SessionBackgroundAction - Failure executing background action: null File not found
The issue is that we our check if the remote file exists gives a false positive. We are requeseting the canonical path from the SFTP server for a path which is expected to fail if the file does not exist but it succeeds instead. This is an interoperability issue with WinSSHD then.
comment:9 Changed on Oct 31, 2013 at 12:47:51 PM by dkocher
In more detail we expect a SSH_FXP_STATUS response for a canonicalize request for a given path with SSH_FXP_REALPATH that does not exist. If it does not return a failure status code we make the false assumption there is a file already on the server to override.
comment:10 Changed on Oct 31, 2013 at 12:55:47 PM by dkocher
From SSH File Transfer Protocol
The SSH_FXP_REALPATH request can be used to have the server canonicalize any given path name to an absolute path. This is useful for converting path names containing ".." components or relative pathnames without a leading slash into absolute paths. The format of the request is as follows:
byte SSH_FXP_REALPATH uint32 request-id string original-path [UTF-8] byte control-byte [optional] string compose-path[0..n] [optional]
original-path
The first component of the path which the client wishes resolved into a absolute canonical path. This may be the entire path.
control-byte
SSH_FXP_REALPATH_NO_CHECK 0x00000001 SSH_FXP_REALPATH_STAT_IF 0x00000002 SSH_FXP_REALPATH_STAT_ALWAYS 0x00000003
This field is optional, and if it is not present in the packet, it is assumed to be SSH_FXP_REALPATH_NO_CHECK.
If SSH_FXP_REALPATH_NO_CHECK is specified, the server MUST NOT fail the request if the path does not exist, is hidden, or the user does not have access to the path or some component thereof. In addition, the path MUST NOT resolve symbolic links. This allows paths to be composed for the SSH_FXP_REMOVE command to remove symbolic links.
As we fail to provide the optional SSH_FXP_REALPATH_NO_CHECK, the default is not fail which indicates WinSSHD works according to the specs but OpenSSH (against we test) is not.
comment:11 Changed on Oct 31, 2013 at 1:21:33 PM by dkocher
- Resolution set to fixed
- Status changed from assigned to closed
Switched to use SSH_FXP_STAT. In r13690.
comment:12 Changed on Nov 18, 2013 at 4:50:18 PM by dkocher
#7517 closed as duplicate.
comment:13 Changed on Nov 18, 2013 at 4:50:30 PM by dkocher
#7617 closed as duplicate.
comment:14 Changed on Nov 18, 2013 at 4:50:56 PM by dkocher
#7620 closed as duplicate.
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