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

["Kirill Safonov (JIRA)" <ji...@apache.org>]

FTP: improved 'LIST' command may work incorrectly with certain servers
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                 Key: VFS-310
                 URL: https://issues.apache.org/jira/browse/VFS-310
             Project: Commons VFS
          Issue Type: Bug
    Affects Versions: Nightly Builds
            Reporter: Kirill Safonov


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:

{noformat}> 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{noformat}

instead of 

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

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.

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