Re: commons-vfs-2.4.1 - Question re. usage of VFS.getManager() - SOLVED
Hi Bernd,
Thanks for your reply. When I tried this again today
VFS.getManager().getSchemes()
returns the following (impressive) list of schemes:
[zip, par, ftps, res, ftp, sar, war, file, gz, tmp, http4s, ear, ejb3,
jar, sftp, http4, ram]
and
VFS.getManager().resolveFile("ftp://ftp.gnu.org/README;, opts);
works as expected. So I don’t know what happened but it looks like I spent a
lot of time chasing a ghost. Oh well, at least I learned a thing or two.
Thanks for your help anyway.
Erwin
>
> I think the problem in your case is that the default filesystem manager does
> not know about the ftp: scheme. The error message is a bit missleading (since
> a fix done, probably we should file a bug for this).
>
> The default manager does try to load the FtpProvider and tries to register it
> with ftp: so I assume loading of the provider failed. Maybe you are missing
> dependencies like commons-net (see the website for the dependencies per
> provider).
>
> For debugging you can print manager.getSchemes() to see the available schemes
> (providers).
> Gruss
> Bernd
>
>
> --
> http://bernd.eckenfels.net
>
>
> Von: Erwin Hogeweg
> Gesendet: Mittwoch, Oktober 30, 2019 3:29 AM
> An: Commons Users List
> Betreff: commons-vfs-2.4.1 - Question re. usage of VFS.getManager()
>
> All -
>
> I am trying to set up a VFS but I struggled a while to get past a
> FileSystemException. After looking at the VFS source code I understood what
> was going on, and I was able to create a work-around. However, I am not sure
> that what I hacked together is the right approach so I am looking for some
> guidance from the experts here…
>
> This is what I was trying to do:
>
> FileObject path = VFS.getManager().resolveFile("ftp://ftp.gnu.org/README;,
> new FileSystemOptions());
>
> The issue is, or at least appears to be, that the FileSystemManager doesn’t
> have a baseFile so the resolveFile blows up with this exception:
>
> org.apache.commons.vfs2.FileSystemException: Could not find file with URI
> "ftp://ftp.gnu.org/README; because it is a relative path, and no base URI was
> provided.
> at
> org.apache.commons.vfs2.FileSystemException.requireNonNull(FileSystemException.java:87)
>
> I could not find how/where to define that baseFile so I eventually settled on
> this work-around:
>
> StandardFileSystemManager fsManager = (StandardFileSystemManager)
> VFS.getManager(); // YUCK!
> fsManager.setBaseFile(new File("")); // Another YUCK.
> FileObject path = fsManager.resolveFile("ftp://ftp.gnu.org/README;, opts);
>
> That works, and now I end up with the correct (expected) path. It doesn’t
> feel right though so any advice would be greatly appreciated.
>
>
> Cheers,
>
> Erwin
>
>
Re: commons-vfs-2.4.1 - Question re. usage of VFS.getManager()
Hello
I think the problem in your case is that the default filesystem manager does
not know about the ftp: scheme. The error message is a bit missleading (since a
fix done, probably we should file a bug for this).
The default manager does try to load the FtpProvider and tries to register it
with ftp: so I assume loading of the provider failed. Maybe you are missing
dependencies like commons-net (see the website for the dependencies per
provider).
For debugging you can print manager.getSchemes() to see the available schemes
(providers).
Gruss
Bernd
--
http://bernd.eckenfels.net
Von: Erwin Hogeweg
Gesendet: Mittwoch, Oktober 30, 2019 3:29 AM
An: Commons Users List
Betreff: commons-vfs-2.4.1 - Question re. usage of VFS.getManager()
All -
I am trying to set up a VFS but I struggled a while to get past a
FileSystemException. After looking at the VFS source code I understood what was
going on, and I was able to create a work-around. However, I am not sure that
what I hacked together is the right approach so I am looking for some guidance
from the experts here…
This is what I was trying to do:
FileObject path = VFS.getManager().resolveFile("ftp://ftp.gnu.org/README;, new
FileSystemOptions());
The issue is, or at least appears to be, that the FileSystemManager doesn’t
have a baseFile so the resolveFile blows up with this exception:
org.apache.commons.vfs2.FileSystemException: Could not find file with URI
"ftp://ftp.gnu.org/README; because it is a relative path, and no base URI was
provided.
at
org.apache.commons.vfs2.FileSystemException.requireNonNull(FileSystemException.java:87)
I could not find how/where to define that baseFile so I eventually settled on
this work-around:
StandardFileSystemManager fsManager = (StandardFileSystemManager)
VFS.getManager(); // YUCK!
fsManager.setBaseFile(new File("")); // Another YUCK.
FileObject path = fsManager.resolveFile("ftp://ftp.gnu.org/README;, opts);
That works, and now I end up with the correct (expected) path. It doesn’t feel
right though so any advice would be greatly appreciated.
Cheers,
Erwin
commons-vfs-2.4.1 - Question re. usage of VFS.getManager()
All -
I am trying to set up a VFS but I struggled a while to get past a
FileSystemException. After looking at the VFS source code I understood what was
going on, and I was able to create a work-around. However, I am not sure that
what I hacked together is the right approach so I am looking for some guidance
from the experts here…
This is what I was trying to do:
FileObject path = VFS.getManager().resolveFile("ftp://ftp.gnu.org/README;,
new FileSystemOptions());
The issue is, or at least appears to be, that the FileSystemManager doesn’t
have a baseFile so the resolveFile blows up with this exception:
org.apache.commons.vfs2.FileSystemException: Could not find file with URI
"ftp://ftp.gnu.org/README; because it is a relative path, and no base URI was
provided.
at
org.apache.commons.vfs2.FileSystemException.requireNonNull(FileSystemException.java:87)
I could not find how/where to define that baseFile so I eventually settled on
this work-around:
StandardFileSystemManager fsManager = (StandardFileSystemManager)
VFS.getManager(); // YUCK!
fsManager.setBaseFile(new File("")); // Another YUCK.
FileObject path = fsManager.resolveFile("ftp://ftp.gnu.org/README;, opts);
That works, and now I end up with the correct (expected) path. It doesn’t feel
right though so any advice would be greatly appreciated.
Cheers,
Erwin
