com.esofthead.mycollab.vaadin.resources.file.FileStreamDownloadResource.java Source code

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Here is the source code for com.esofthead.mycollab.vaadin.resources.file.FileStreamDownloadResource.java

Source

/**
 * This file is part of mycollab-ui.
 *
 * mycollab-ui is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * mycollab-ui 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with mycollab-ui.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.esofthead.mycollab.vaadin.resources.file;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.esofthead.mycollab.configuration.FileStorageConfiguration;
import com.vaadin.server.DownloadStream;
import com.vaadin.server.FileResource;

/**
 * 
 * @author MyCollab Ltd.
 * @since 2.0
 */
class FileStreamDownloadResource extends FileResource {
    private static final long serialVersionUID = 1L;

    private static final Logger LOG = LoggerFactory.getLogger(FileStreamDownloadResource.class);

    FileStreamDownloadResource(String documentPath) {
        super(new File(FileStorageConfiguration.baseContentFolder, documentPath));
    }

    @Override
    public DownloadStream getStream() {
        try {
            String fileName = getFilename();
            fileName = fileName.replaceAll(" ", "_").replaceAll("-", "_");
            final DownloadStream ds = new DownloadStream(new FileInputStream(getSourceFile()), getMIMEType(),
                    fileName);
            ds.setParameter("Content-Disposition", "attachment; filename=" + fileName);
            ds.setCacheTime(0);
            return ds;
        } catch (final FileNotFoundException e) {
            LOG.error("Error to create download stream", e);
            return null;
        }
    }

}