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https://issues.apache.org/jira/browse/NET-475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13414247#comment-13414247
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Sebb commented on NET-475:
--------------------------
The obvious fix is to only set the restart offset immediately before a file
transfer.
On further reflection, does it make sense to change NET to delay the sending of
REST until the next file transfer?
It seems more natural to me to set the offset immediately before starting the
transfer.
So the only change required is to clarify that setRestartOffset() should only
be called immediately before a file transfer.
> FtpClient sends REST when calling listFiles
> -------------------------------------------
>
> Key: NET-475
> URL: https://issues.apache.org/jira/browse/NET-475
> Project: Commons Net
> Issue Type: Bug
> Components: FTP
> Affects Versions: 3.0.1, 3.1
> Environment: Windows Vista Enterprise SP2
> Java SE 1.6
> Reporter: Thomas Axelsson
> Labels: LIST, REST, listFiles, offset, restart, setRestartOffset
>
> First setting a restart offset and then requesting a directory listing makes
> FtpClient send REST, LIST. The correct behavior should be to send only LIST
> and send REST on the first file transfer operation.
> Versions 3.1 and 3.0.1 of commons-net have shown this behavior in our
> software.
> Following is a minimal sample, tested with version 3.1:
> {code}
> package test;
> import java.io.PrintWriter;
> import org.apache.commons.net.PrintCommandListener;
> import org.apache.commons.net.ftp.FTPClient;
> public class Test {
> public static void main(String[] args) throws Exception {
> FTPClient client = new FTPClient();
> client.addProtocolCommandListener(new PrintCommandListener(
> new PrintWriter(System.out), true));
>
> client.connect(Server.ip);
> client.login(Server.username, Server.password);
>
> client.setRestartOffset(10);
>
> client.listFiles("");
> }
>
> }
> {code}
> Output:
> {code}
> 220 Welcome to FTP service.
> USER *******
> 331 Please specify the password.
> PASS *******
> 230 Login successful.
> SYST
> 215 UNIX Type: L8
> PORT 10,43,92,50,230,56
> 200 PORT command successful. Consider using PASV.
> REST 10
> 350 Restart position accepted (10).
> LIST
> 150 Here comes the directory listing.
> 226 Directory send OK.
> {code}
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