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https://issues.apache.org/jira/browse/SSHD-963?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17004038#comment-17004038
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Lyor Goldstein edited comment on SSHD-963 at 12/27/19 9:35 AM:
---------------------------------------------------------------
[~barry-gq]
{quote}but in fact they are separated
{quote}
- please examine the code *carefully* - they are separated, but each checks the
existence of the *other* one - in other words, the code is making sure that
*both* are set, and only then adds the relevant mask. According to [SFTP
v3|https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-5] if the
{{SSH_FILEXFER_ATTR_ACMODTIME}} is set then *both* times are available - and
this is what the code ensures.
{quote}look forward to your updates in subsequent versions
{quote}
I don't foresee updates on this issue on subsequent releases since it feels
like what you are asking is to violate the standard - which I am reluctant to
do since it may break compatibility with existing clients.
{quote}I will try to modify it myself to temporarily fix this problem
{quote}
What I can suggest is the following: upgrade to the latest version and see if
the problem persists - especially with +other clients+ such as WinSCP and
OpenSSH. Perhaps FileZilla is trying to do something non-standard - it isn't
the first time we've had issues open that turned out to be violations of the
standard by various clients that were assuming that they were talking with a
proprietary server of their own who was tolerating the non-standard behavior.
If the problem persists (even if it does only for FileZilla), try to debug the
code sequence and try to figure out what *exactly* is causing problems - making
sure especially that it is not something that only FileZilla does or some
peculiar behavior of the O/S or the Java version you are using that somehow
does not report both flags are existing. Once that is done, please update the
issue and describe it. If indeed it is a mis-interpretation on our part we will
gladly fix it. If not, I am willing to entertain adding a +special+
configuration property that can tell our client to "mis-behave" (default of
course will be _false_).
was (Author: lgoldstein):
[~barry-gq] {quote}but in fact they are separated{quote} - please examine the
code *carefully* - they are separated, but each checks the existence of the
*other* one - in other words, the code is making sure that *both* are set, and
only then adds the relevant mask. According to [SFTP
v3|https://tools.ietf.org/html/draft-ietf-secsh-filexfer-02#section-5] if the
{{SSH_FILEXFER_ATTR_ACMODTIME}} is set then *both* times are available - and
this is what the code ensures.
{quote}look forward to your updates in subsequent versions{quote} I don't
foresee updates on this issue on subsequent releases since it feels like what
you are asking is to violate the standard - which I am reluctant to do since it
may break compatibility with existing clients.
{quote}I will try to modify it myself to temporarily fix this problem{quote}
What I can suggest is the following: upgrade to the latest version and see if
the problem persists - especially with +other clients+ such as WinSCP and
OpenSSH. Perhaps FileZilla is trying to do something non-standard - it isn't
the first time we've had issues open that turned out to be violations of the
standard by various clients that were assuming that they were talking with a
proprietary server of their own who was tolerating the non-standard behavior.
If the problem persists (even if it does only for FileZilla), try to debug the
code sequence and try to figure out what *exactly* is causing problems - making
sure especially that it is not something that only FileZilla does. Once that is
done, please update the issue and describe it. If indeed it is a
mis-interpretation on our part we will gladly fix it. If not, I am willing to
entertain adding a +special+ configuration property that can tell our client to
"mis-behave" (default of course will be _false_).
> Uploading a file with filezilla,preserve timestamps of transferred files， but
> setting fileAttributes failed
> -----------------------------------------------------------------------------------------------------------
>
> Key: SSHD-963
> URL: https://issues.apache.org/jira/browse/SSHD-963
> Project: MINA SSHD
> Issue Type: Bug
> Affects Versions: 1.7.0
> Reporter: barry-gq
> Assignee: Lyor Goldstein
> Priority: Blocker
> Attachments: 1.png, 2.png
>
>
> *background:*
> I have a project to process some data with apache sshd-sftp
>
> *Operation ：*
> I use filezilla to upload a file and turn on the option to preserve the
> timestamp of the transferred file，but modifytime is not set correctly
>
> *java code description：*
> After uploading a file, the server code can receive the accesstime and
> modifytime normally, but when the client processes version V3, there is only
> one flags parameter, which makes it impossible to set modifytime
> correctly.The two codes of the picture are: pciture
> 1:AbstractSftpSubsystemHelper :: setFileAttributes, pciture
> 2:AbstractSftpClient :: writeAttributes
>
>
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