On Tue, Jan 11, 2011 at 07:06, Joerg Schmidbauer <[email protected]> wrote:
>
> I'm currently investigating the possibilities of implementing
> SSH/SCP/SFTP for VSE. My favorite scenario would be some kind of
> a "proxy SSHD" running on Unix/Linux/Windows, forwarding commands
> via IP to VSE, where an already existing server executes cmds
> and sends the output back.
...
> My question is basically: what's the simplest way of using the MINA SSHD
> as a proxy with the VSE operating system? The most elegant way of course
> would be just adding my code optionally without changing your code.
Create your own SshServer instance. A good place to start is to use
the setUpDefaultServer() method:
SshServer sshd = SshServer.setUpDefaultServer();
Now replace the CommandFactory with your own. This will handle any
commands that come in from the command line and would forward them:
sshd.setCommandFactory(new CommandFactory() {
public Command createCommand(String commandLine) {
return new VseCommand(commandLine);
}
});
class VseCommand implements Command {
public void start(Environment env) {
... create a new thread
... within the thread, forward command to VSE
... also do copying of InputStream, OutputStream, ErrorStream as necessary
... note you may need 3 threads (one for each stream)
}
}
Likewise you can also replace the ShellFactory to support interactive
shells, and FileSystemFactory to support the SFTP server's access to
files.
scp is a bit more difficult. Your CommandFactory would need to create
and return the ScpCommand, but its file system interface hasn't been
abstracted to use the FileSystemFactory. So right now ScpCommand
modifies the SshServer's host filesystem as the SshServer's JVM user.
Not exactly what you want. If you really need it, you should refactor
ScpCommand to use the FileSystemFactory and try to submit the patch
back to the project for inclusion in a future release.
