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
