SshServlet.java
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/*
* Copyright Codecrew Ry
*
* All rights reserved.
*
* This license applies to any software containing a notice placed by the
* copyright holder. Such software is herein referred to as the Software.
* This license covers modification, distribution and use of the Software.
*
* Any distribution and use in source and binary forms, with or without
* modification is not permitted without explicit written permission from the
* copyright owner.
*
* A non-exclusive royalty-free right is granted to the copyright owner of the
* Software to use, modify and distribute all modifications to the Software in
* future versions of the Software.
*
*/
package fi.codecrew.moya.servlet;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import javax.ejb.EJB;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.sshd.SshServer;
import org.apache.sshd.common.Factory;
import org.apache.sshd.server.Command;
import org.apache.sshd.server.keyprovider.SimpleGeneratorHostKeyProvider;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import fi.codecrew.moya.beans.EventBeanLocal;
import fi.codecrew.moya.beans.PermissionBeanLocal;
import fi.codecrew.moya.clientutils.BortalLocalContextHolder;
import fi.codecrew.moya.cmdline.Hello;
import fi.codecrew.moya.model.LanEvent;
/**
* Servlet implementation class SshServlet
*/
@WebServlet(urlPatterns = "/ssh", loadOnStartup = 10)
public class SshServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private static final Logger logger = LoggerFactory.getLogger(SshServlet.class);
private Map<Integer, SshServer> servers = new HashMap<Integer, SshServer>();
// Timeout 30 min
private static final String TIMEOUT = Integer.toString(1000 * 60 * 30);
@EJB
private EventBeanLocal eventbean;
@EJB
private PermissionBeanLocal permBean;
/**
* @see HttpServlet#HttpServlet()
*/
public SshServlet() {
super();
// TODO Auto-generated constructor stub
}
private class SshShellFactor implements Factory<Command> {
private BortalLocalContextHolder context;
public SshShellFactor(BortalLocalContextHolder instance) {
context = instance;
}
@Override
public Command create() {
logger.info("creating new bortal command");
BortalCommand bc = new BortalCommand(context);
bc
.addCommandlineCommand("hello", new Hello(permBean))
.addCommandlineCommand("hallo", new Hello(permBean));
return bc;
}
}
/**
* @see Servlet#init(ServletConfig)
*/
public void init(ServletConfig config) throws ServletException {
}
private SshServer initSsh(Integer id) {
logger.info("Initializing ssh servlet");
SshServer sshd = SshServer.setUpDefaultServer();
sshd.setPort(8022);
sshd.getProperties().put(SshServer.IDLE_TIMEOUT, TIMEOUT);
sshd.setShellFactory(new SshShellFactor(BortalLocalContextHolder.getInstance()));
BortalPasswordAuthenticator pswdAuth = new BortalPasswordAuthenticator(BortalLocalContextHolder.getInstance());
sshd.setPasswordAuthenticator(pswdAuth);
sshd.setKeyPairProvider(new SimpleGeneratorHostKeyProvider("hostkey.ser"));
try {
sshd.start();
return sshd;
} catch (IOException e) {
logger.warn("sshd start failed! ", e);
}
return null;
}
/**
* @see Servlet#destroy()
*/
public void destroy() {
logger.info("Destroying ssh servlet");
for (Entry<Integer, SshServer> entry : servers.entrySet())
{
try {
entry.getValue().stop();
} catch (InterruptedException e) {
logger.warn("Error stopping ssh", e);
}
}
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
LanEvent event = eventbean.getCurrentEvent();
if (!servers.containsKey(event.getId())) {
SshServer ssh = initSsh(event.getId());
if (ssh != null) {
servers.put(event.getId(), ssh);
}
}
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
}