/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.services.ftp.command;
import org.exoplatform.services.ftp.FtpConst;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import javax.jcr.NoSuchWorkspaceException;
import javax.jcr.Node;
import javax.jcr.PathNotFoundException;
import javax.jcr.Property;
import javax.jcr.Session;
/**
* Created by The eXo Platform SAS Author : Vitaly Guly gavrik-vetal@ukr.net/mail.ru
*
* @version $Id: $
*/
public class CmdRetr extends FtpCommandImpl
{
private static final Log LOG = ExoLogger.getLogger(FtpConst.FTP_PREFIX + "CmdRetr");
public CmdRetr()
{
commandName = FtpConst.Commands.CMD_RETR;
}
public void run(String[] params) throws IOException
{
if (clientSession().getDataTransiver() == null)
{
reply(FtpConst.Replyes.REPLY_425);
return;
}
if (params.length < 2)
{
reply(String.format(FtpConst.Replyes.REPLY_500_PARAMREQUIRED, FtpConst.Commands.CMD_RETR));
return;
}
String resName = params[1];
boolean isResource = IsResource(resName);
if (!isResource)
{
reply(String.format(FtpConst.Replyes.REPLY_550, resName));
return;
}
try
{
ArrayList<String> newPath = clientSession().getFullPath(resName);
Session curSession = clientSession().getSession(newPath.get(0));
String repoPath = clientSession().getRepoPath(newPath);
Node parentNode = (Node)curSession.getItem(repoPath);
Node dataNode = parentNode.getNode(FtpConst.NodeTypes.JCR_CONTENT);
Property dataProp = dataNode.getProperty(FtpConst.NodeTypes.JCR_DATA);
InputStream inStream = dataProp.getStream();
if (FtpConst.Commands.CMD_REST.equals(clientSession().getPrevCommand()))
{
String prevVal = clientSession().getPrevParams();
int seekPos = new Integer(prevVal);
if (seekPos > inStream.available())
{
reply(FtpConst.Replyes.REPLY_550_RESTORE);
return;
}
for (int i = 0; i < seekPos; i++)
{
inStream.read();
}
}
while (!clientSession().getDataTransiver().isConnected())
{
Thread.sleep(100);
}
reply(FtpConst.Replyes.REPLY_125);
int BUFFER_SIZE = 4096;
try
{
byte[] buffer = new byte[BUFFER_SIZE];
OutputStream outStream = clientSession().getDataTransiver().getOutputStream();
while (true)
{
int readed = inStream.read(buffer, 0, BUFFER_SIZE);
if (readed < 0)
{
break;
}
outStream.write(buffer, 0, readed);
}
}
catch (Exception exc)
{
reply(FtpConst.Replyes.REPLY_451);
return;
}
finally
{
clientSession().closeDataTransiver();
}
reply(FtpConst.Replyes.REPLY_226);
return;
}
catch (Throwable exc) //NOSONAR
{
LOG.info("Unhandled exception. " + exc.getMessage(), exc);
}
clientSession().closeDataTransiver();
reply(String.format(FtpConst.Replyes.REPLY_550, resName));
}
public boolean IsResource(String resName)
{
ArrayList<String> newPath = clientSession().getFullPath(resName);
try
{
if (!newPath.isEmpty())
{
String repoPath = clientSession().getRepoPath(newPath);
Session curSession = clientSession().getSession(newPath.get(0));
Node parentNode = (Node)curSession.getItem(repoPath);
if (parentNode.isNodeType(FtpConst.NodeTypes.NT_FILE))
{
return true;
}
}
else
{
return false;
}
}
catch (PathNotFoundException exc)
{
if (LOG.isTraceEnabled())
{
LOG.trace("An exception occurred: " + exc.getMessage());
}
}
catch (NoSuchWorkspaceException wexc)
{
if (LOG.isTraceEnabled())
{
LOG.trace("An exception occurred: " + wexc.getMessage());
}
}
catch (Throwable exc) //NOSONAR
{
LOG.info("Unhandled exception. " + exc.getMessage(), exc);
}
return false;
}
}