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From "Rory Winston (JIRA)" <j...@apache.org>
Subject [jira] Commented: (NET-188) FTPClient#listFiles returns null element when file's timestamp is "02/29"
Date Mon, 25 Feb 2008 18:22:51 GMT

    [ https://issues.apache.org/jira/browse/NET-188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12572149#action_12572149
] 

Rory Winston commented on NET-188:
----------------------------------

Hmmm. This is a tough one. With no year information in the date string, SimpleDateFormat clears
the internal Calendar and sets the YEAR field to 1970, the epoch  (the default). Normally,
this will have no impact on date parsing, *except* when the year in question is a leap year,
as 1970 wasn't one. Thus, SDF thinks that Feb 29th should be riolled over to March 1st in
lenient mode, and in strict mode (the default for Net parsing), it simply returns null.  Of
course, the real culprit is the horrible Java date/time package implementation. Using something
like Joda-time for this works as expected.

> FTPClient#listFiles returns null element when file's timestamp is "02/29"
> -------------------------------------------------------------------------
>
>                 Key: NET-188
>                 URL: https://issues.apache.org/jira/browse/NET-188
>             Project: Commons Net
>          Issue Type: Bug
>    Affects Versions: 1.4
>            Reporter: HONMA Hirotaka
>
> This issue has same cause as VALIDATOR-221.
> org.apache.commons.net.ftp.parser.FTPTimestampParserImpl#parseTimestamp throws ParseException
with timestampStr = "Feb 29 11:22".
> FTP Server status:
> {code}
> [root@localhost test-commonsnet]# pwd
> /tmp/test-commonsnet
> [root@localhost test-commonsnet]# ls -l
> total 0
> -rw-r--r--  1 root root 0 Dec 19  2006 aaa.txt
> -rw-r--r--  1 root root 0 Feb 29 11:22 bbb.txt
> {code}
> test code:
> {code}
> public void testCommonsNetLeapDay() throws Exception {
>     final FTPClient ftp = new FTPClient();
>     ftp.connect(host);
>     ftp.login(user, password);
>     final FTPFile[] listFiles = ftp.listFiles("/tmp/test-commonsnet");
>     for (int i = 0; i < listFiles.length; i++) {
>         System.out.println("[" + i + "] " + listFiles[i]);
>     }
>     ftp.disconnect();
> }
> {code}
> results bellow.
> {code}
> [0] -rw-r--r--    1 0        0               0 Dec 18  2006 aaa.txt
> [1] null
> {code}
> Second element(bbb.txt) should not be null.

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