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Posted to issues@commons.apache.org by "Sebb (JIRA)" <ji...@apache.org> on 2017/02/07 15:06:41 UTC
[jira] [Reopened] (NET-610) FTPClient.mlistFile incorrectly handles
MLST reply
[ https://issues.apache.org/jira/browse/NET-610?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sebb reopened NET-610:
----------------------
Sorry, I misunderstood the problem.
(I think I can see why they may have omitted the space: RFC 959 says that a space must precede a number for multi-line responses. However RFC 3659, which defines the MLST command, says that there must be a space before non-numerics as well.)
> FTPClient.mlistFile incorrectly handles MLST reply
> --------------------------------------------------
>
> Key: NET-610
> URL: https://issues.apache.org/jira/browse/NET-610
> Project: Commons Net
> Issue Type: Bug
> Components: FTP
> Affects Versions: 3.5
> Environment: using some FTP-server incorrectly releasing RFC 3659. For example xlight ftp server (https://www.xlightftpd.com/)
> Reporter: Sergey Yanzin
> Labels: easyfix, patch
> Original Estimate: 24h
> Remaining Estimate: 24h
>
> By RFC 3659 server must start fact with space character. But some inaccurate realisations reply without starting space.
> But org.apache.commons.net.ftp.FTPClient.mlistFile() skips leading character even it is not a space:
> public FTPFile mlistFile(String pathname) throws IOException
> {
> boolean success = FTPReply.isPositiveCompletion(sendCommand(FTPCmd.MLST, pathname));
> if (success){
> String entry = getReplyStrings()[1].substring(1); // skip leading space for parser
> return MLSxEntryParser.parseEntry(entry);
> } else {
> return null;
> }
> }
> I think it is wrong. The method should throw exception, if first character is not a space. Or does not remove starting char (and should be some option responsible for that behaviour) if it is not a space.
> my workaround in overriden method:
> public FTPFile mlistFile(String pathname) throws IOException {
> final boolean success = FTPReply.isPositiveCompletion(sendCommand(FTPCmd.MLST, pathname));
> if (success) {
> final String reply = getReplyStrings()[1];
> final String entry = reply.charAt(0) == ' ' ? reply.substring(1) : reply;
> return MLSxEntryParser.parseEntry(entry);
> } else {
> return null;
> }
> }
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