sftp - How to Set Root Directory in Apache Mina Sshd Server in Java

Question

I use Apache Mina Sshd API to start up a local SFTP server in java.In SFTP client i use Jcraft jsch API to create my SFTP client.I successfully start up a server.The problem is that i want to write some unit test cases to check whether client can put some files into server's root directory. Currently my SFTP server doesn't have any root directory.So i would like to know that is there is any approach to set server's root directory.

Eg: C:sftp How can i set this path as my server root directory.so then client can read and write files to it every time connect with the server.Thank you.

public class SftpServerStarter {

    private SshServer sshd;
    private final static Logger logger = 
        LoggerFactory.getLogger(SftpServerStarter.class);

    public void start(){
        sshd = SshServer.setUpDefaultServer();
        sshd.setPort(22);
        sshd.setHost("localhost");
        sshd.setPasswordAuthenticator(new MyPasswordAuthenticator());
        sshd.setPublickeyAuthenticator(new MyPublickeyAuthenticator());
        sshd.setKeyPairProvider(new SimpleGeneratorHostKeyProvider());
        sshd.setSubsystemFactories(
            Arrays.<NamedFactory<Command>>asList(new SftpSubsystem.Factory()));
        sshd.setCommandFactory(new ScpCommandFactory());

        try {
            logger.info("Starting ...");
            sshd.start();
            logger.info("Started");
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            logger.info("Can not Start Server");
        }
    }
}

Answer 1

In more recent sshd versions you can use org.apache.sshd.common.file.virtualfs.VirtualFileSystemFactory and supply it to the SshServer instance via method setFileSystemFactory.

Snippet:

VirtualFileSystemFactory fileSystemFactory = new VirtualFileSystemFactory();
fileSystemFactory.setDefaultHomeDir("home.directory");
sshd.setFileSystemFactory(fileSystemFactory)