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https://issues.apache.org/jira/browse/NET-449?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13222468#comment-13222468
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Sebb edited comment on NET-449 at 3/5/12 5:51 PM:
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Not sure there's anything Net can do about this.
The parameter to the LIST command is supposed to be a pathname, and it is up to
the server to determine if it is a file or a directory.
However, the "-" prefix is used by some servers for supporting qualifiers, e.g.
-a, -l
This obviously has the potential to be confused with a valid pathname.
If the server fails to recognise "-data" as a pathname, then it seems to me
that this is a bug in the server.
It ought to behave according to the RFCs.
was (Author: s...@apache.org):
Not sure there's anything Net can do about this.
The parameter to the LIST command is supposed to be a pathname, and it is up to
the server to determine if it is a file or a directory.
The "-" prefix is used by some servers for supporting qualifiers, e.g. -a.
I don't think there is any way to "escape" the leading "-", at least not one
that would work on all servers.
The parameter "./-data" would probably work on most FTP servers, but AFAIK
servers don't have to support that, and some may not do so.
> listFiles bug with folder that begins with "-"
> ----------------------------------------------
>
> Key: NET-449
> URL: https://issues.apache.org/jira/browse/NET-449
> Project: Commons Net
> Issue Type: Bug
> Components: FTP
> Affects Versions: 3.1
> Reporter: Stéphane Verger
>
> FTP Server status:
> {code}
> root@xxx-srv:/data/Library# tree -A
> .
> ├── -dash
> │ ├── -dash.txt
> │ ├── file1.txt
> │ └── file2.txt
> └── test
> ├── file2.txt
> └── file.txt
> {code}
> Test code:
> {code}
> final org.apache.commons.net.ftp.FTPClient ftp = new
> org.apache.commons.net.ftp.FTPClient();
> ftp.connect(host, port);
> ftp.login(login, pwd);
>
> System.out.println("PWD: " + ftp.printWorkingDirectory());
> final FTPFile[] listFiles = ftp.listFiles();
> for (int i = 0; i < listFiles.length; i++) {
> System.out.println("[" + i + "] " + listFiles[i]);
> }
>
> System.out.println("Files in /-dash");
> final FTPFile[] listFiles2 = ftp.listFiles("/-dash");
> for (int i = 0; i < listFiles2.length; i++) {
> System.out.println("[" + i + "] " + listFiles2[i]);
> }
>
> System.out.println("Files in -dash");
> final FTPFile[] listFiles3 = ftp.listFiles("-dash");
> for (int i = 0; i < listFiles3.length; i++) {
> System.out.println("[" + i + "] " + listFiles3[i]);
> }
> {code}
> results:
> {code}
> PWD: /
> [0] -dash
> [1] test
> Files in /-dash
> [0] -dash.txt
> [1] file1.txt
> [2] file2.txt
> Files in -dash
> [0] -dash
> [1] .
> [2] ..
> [3] test
> {code}
> When listing "-dash", it list the current directory instead of the
> destination one.
> If I do the same test with the folder test, this time it works as expected.
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