org.pentaho.platform.dataaccess.datasource.wizard.service.impl.UploadFileDebugServlet.java Source code

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/*!
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program 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.
*
* Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
*/

package org.pentaho.platform.dataaccess.datasource.wizard.service.impl;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;

import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.pentaho.platform.api.engine.IPentahoSession;
import org.pentaho.platform.dataaccess.datasource.wizard.service.impl.utils.PentahoSystemHelper;
import org.pentaho.platform.dataaccess.datasource.wizard.service.messages.Messages;
import org.pentaho.platform.engine.core.system.PentahoSessionHolder;
import org.pentaho.platform.engine.core.system.PentahoSystem;
import org.pentaho.platform.util.UUIDUtil;
import org.pentaho.reporting.libraries.base.util.StringUtils;

public class UploadFileDebugServlet extends HttpServlet implements Servlet {

    private static final long serialVersionUID = 8305367618713715640L;

    private static final long MAX_FILE_SIZE = 300000;

    private static final long MAX_FOLDER_SIZE = 900000;

    public static final String DEFAULT_RELATIVE_UPLOAD_FILE_PATH = File.separatorChar + "system"
            + File.separatorChar + "metadata" + File.separatorChar + "csvfiles" + File.separatorChar; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$

    public UploadFileDebugServlet() {
        PentahoSystemHelper.init();
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {

            String relativePath = PentahoSystem.getSystemSetting("file-upload-defaults/relative-path",
                    String.valueOf(DEFAULT_RELATIVE_UPLOAD_FILE_PATH)); //$NON-NLS-1$
            String maxFileLimit = PentahoSystem.getSystemSetting("file-upload-defaults/max-file-limit", //$NON-NLS-1$
                    String.valueOf(MAX_FILE_SIZE));
            String maxFolderLimit = PentahoSystem.getSystemSetting("file-upload-defaults/max-folder-limit", //$NON-NLS-1$
                    String.valueOf(MAX_FOLDER_SIZE));
            IPentahoSession session = PentahoSessionHolder.getSession();

            response.setContentType("text/plain"); //$NON-NLS-1$

            FileItem uploadItem = getFileItem(request);
            if (uploadItem == null) {
                String error = Messages.getErrorString("UploadFileDebugServlet.ERROR_0001_NO_FILE_TO_UPLOAD"); //$NON-NLS-1$
                response.getWriter().write(error);
                return;
            }
            if (Long.parseLong(maxFileLimit) < uploadItem.getSize()) {
                String error = Messages.getErrorString("UploadFileDebugServlet.ERROR_0003_FILE_TOO_BIG"); //$NON-NLS-1$
                response.getWriter().write(error);
                return;
            }

            String path = PentahoSystem.getApplicationContext().getSolutionPath(relativePath);
            File pathDir = new File(path);
            // create the path if it doesn't exist yet
            if (!pathDir.exists()) {
                pathDir.mkdirs();
            }

            if (uploadItem.getSize() + getFolderSize(new File(path)) > Long.parseLong(maxFolderLimit)) {
                String error = Messages
                        .getErrorString("UploadFileDebugServlet.ERROR_0004_FOLDER_SIZE_LIMIT_REACHED"); //$NON-NLS-1$
                response.getWriter().write(error);
                return;
            }

            String filename = request.getParameter("file_name"); //$NON-NLS-1$
            if (StringUtils.isEmpty(filename)) {
                filename = UUIDUtil.getUUID().toString();
            }

            String temporary = request.getParameter("mark_temporary"); //$NON-NLS-1$
            boolean isTemporary = false;
            if (temporary != null) {
                isTemporary = Boolean.valueOf(temporary);
            }

            File file;
            if (isTemporary) {
                File tempDir = new File(PentahoSystem.getApplicationContext().getSolutionPath("system/tmp"));
                if (tempDir.exists() == false) {
                    tempDir.mkdir();
                }
                file = PentahoSystem.getApplicationContext().createTempFile(session, filename, ".tmp", true); //$NON-NLS-1$
            } else {
                file = new File(path + File.separatorChar + filename);
            }

            FileOutputStream outputStream = new FileOutputStream(file);
            byte[] fileContents = uploadItem.get();
            outputStream.write(fileContents);
            outputStream.flush();
            outputStream.close();

            response.getWriter().write(file.getName());
        } catch (Exception e) {
            String error = Messages.getErrorString("UploadFileDebugServlet.ERROR_0005_UNKNOWN_ERROR", //$NON-NLS-1$
                    e.getLocalizedMessage());
            response.getWriter().write(error);
        }
    }

    private FileItem getFileItem(HttpServletRequest request) {
        FileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);
        try {
            List items = upload.parseRequest(request);
            Iterator it = items.iterator();
            while (it.hasNext()) {
                FileItem item = (FileItem) it.next();
                if (!item.isFormField() && "uploadFormElement".equals(item.getFieldName())) { //$NON-NLS-1$
                    return item;
                }
            }
        } catch (FileUploadException e) {
            return null;
        }
        return null;
    }

    private long getFolderSize(File folder) {
        long foldersize = 0;
        File[] filelist = folder.listFiles();
        for (int i = 0; i < filelist.length; i++) {
            if (filelist[i].isDirectory()) {
                foldersize += getFolderSize(filelist[i]);
            } else {
                foldersize += filelist[i].length();
            }
        }
        return foldersize;
    }
}