fr.insalyon.creatis.vip.datamanager.server.rpc.FileDownloadServiceImpl.java Source code

Introduction

Here is the source code for fr.insalyon.creatis.vip.datamanager.server.rpc.FileDownloadServiceImpl.java

Source

/*
 * Copyright and authors: see LICENSE.txt in base repository.
 *
 * This software is a web portal for pipeline execution on distributed systems.
 *
 * This software is governed by the CeCILL-B license under French law and
 * abiding by the rules of distribution of free software.  You can  use, 
 * modify and/ or redistribute the software under the terms of the CeCILL-B
 * license as circulated by CEA, CNRS and INRIA at the following URL
 * "http://www.cecill.info". 
 *
 * As a counterpart to the access to the source code and  rights to copy,
 * modify and redistribute granted by the license, users are provided only
 * with a limited warranty  and the software's author,  the holder of the
 * economic rights,  and the successive licensors  have only  limited
 * liability. 
 *
 * In this respect, the user's attention is drawn to the risks associated
 * with loading,  using,  modifying and/or developing or reproducing the
 * software by the user in light of its specific status of free software,
 * that may mean  that it is complicated to manipulate,  and  that  also
 * therefore means  that it is reserved for developers  and  experienced
 * professionals having in-depth computer knowledge. Users are therefore
 * encouraged to load and test the software's suitability as regards their
 * requirements in conditions enabling the security of their systems and/or 
 * data to be ensured and,  more generally, to use and operate it in the 
 * same conditions as regards security. 
 *
 * The fact that you are presently reading this means that you have had
 * knowledge of the CeCILL-B license and that you accept its terms.
 */
package fr.insalyon.creatis.vip.datamanager.server.rpc;

import fr.insalyon.creatis.grida.client.GRIDAClientException;
import fr.insalyon.creatis.grida.client.GRIDAPoolClient;
import fr.insalyon.creatis.grida.common.bean.Operation;
import fr.insalyon.creatis.vip.core.client.bean.User;
import fr.insalyon.creatis.vip.core.client.view.CoreConstants;
import fr.insalyon.creatis.vip.core.server.business.CoreUtil;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.io.FilenameUtils;
import org.apache.log4j.Logger;

/**
 *
 * @author Rafael Silva
 */
public class FileDownloadServiceImpl extends HttpServlet {

    private static Logger logger = Logger.getLogger(FileDownloadServiceImpl.class);

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        User user = (User) req.getSession().getAttribute(CoreConstants.SESSION_USER);
        String operationId = req.getParameter("operationid");

        if (user != null && operationId != null && !operationId.isEmpty()) {

            try {
                GRIDAPoolClient client = CoreUtil.getGRIDAPoolClient();
                Operation operation = client.getOperationById(operationId);

                File file = new File(operation.getDest());
                if (file.isDirectory()) {
                    file = new File(operation.getDest() + "/" + FilenameUtils.getName(operation.getSource()));
                }
                int length = 0;
                ServletOutputStream op = resp.getOutputStream();
                ServletContext context = getServletConfig().getServletContext();
                String mimetype = context.getMimeType(file.getName());

                logger.info("(" + user.getEmail() + ") Downloading '" + file.getAbsolutePath() + "'.");

                resp.setContentType((mimetype != null) ? mimetype : "application/octet-stream");
                resp.setContentLength((int) file.length());
                resp.setHeader("Content-Disposition", "attachment; filename=\"" + file.getName() + "\"");

                byte[] bbuf = new byte[4096];
                DataInputStream in = new DataInputStream(new FileInputStream(file));

                while ((in != null) && ((length = in.read(bbuf)) != -1)) {
                    op.write(bbuf, 0, length);
                }

                in.close();
                op.flush();
                op.close();
            } catch (GRIDAClientException ex) {
                logger.error(ex);
            }
        }
    }
}