[VFS-310] FTP: improved 'LIST' command may work incorrectly with certain servers

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: Nightly Builds
• Assignee: Unassigned
• Reporter: Kirill Safonov
• Created: 05/Jun/10 15:01
• Updated: 05/Jun/10 15:01

Description

FTP LIST command was enhanced recently to improve the performance: instead of stepping into the target directory, 'LIST <relpath>' is executed.
Still, it may cause problems with certain FTP server software that returns child file names in relative form:

> LIST test 
150 Opening BINARY mode data connection for file list. 
total 56 
drwxrwx---   2 user     4096 May 17 14:07 test/css 
drwxrwx---   2 user     4096 May 17 14:08 test/images 
-rw-rw----   1 user     6397 May 17 14:07 test/index.html

instead of

drwxrwx---   2 user     4096 May 17 14:07 css 
drwxrwx---   2 user     4096 May 17 14:08 images

This results in an immediate error, such as:
org.apache.commons.vfs.FileSystemException: Invalid descendent file name "test/css".
at org.apache.commons.vfs.impl.DefaultFileSystemManager.resolveName(DefaultFileSystemManager.java:790)
at org.apache.commons.vfs.provider.AbstractFileObject.getChildren(AbstractFileObject.java:689)
at org.apache.commons.vfs.provider.ftp.FtpFileObject.getChildren(FtpFileObject.java:453)

The desired solution is Commons VFS expects such behaviour and strips the leading part of files names (if possible?)
At least, FtpFileSystemConfigBuilder should provide an option to fallback to previous (slower) way of listing children.