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From "Andrew Franklin (JIRA)" <j...@apache.org>
Subject [jira] Created: (VFS-257) FTP: Add support for MDTM to get more accurate last modified times
Date Mon, 18 May 2009 06:44:46 GMT
FTP: Add support for MDTM to get more accurate last modified times
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                 Key: VFS-257
                 URL: https://issues.apache.org/jira/browse/VFS-257
             Project: Commons VFS
          Issue Type: Improvement
    Affects Versions: 1.1
            Reporter: Andrew Franklin


The current FTPFileObject implementation delegates to the commons-net FtpFile to get the last
modified date. Unfortunately this value is parsed from the result of the LIST command, which
suffers from a few issues:
* NET-212 - LMDs aren't persistable beyond a year as commons-net has to guess the year in
many cases, based on the current year.
* Most FTP parser formats are only accurate to the minute, and sometimes only the nearest
day
* Sometimes the FTP server will change the time format for a single file over time, changing
the resulting lmd.

By using the MDTM command you're able to get a last modified date that's accurate to the second
(and sometimes even millisecond) and doesn't suffer from the above issues. As I understand
it, the command is implemented in commons-net 2.1?

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