/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2009 Jaspersoft Corporation. All rights reserved.
* http://www.jaspersoft.com
*
* Unless you have purchased a commercial license agreement from Jaspersoft,
* the following license terms apply:
*
* This program is part of JasperReports.
*
* JasperReports 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 3 of the License, or
* (at your option) any later version.
*
* JasperReports 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 JasperReports. If not, see <http://www.gnu.org/licenses/>.
*/
package net.sf.jasperreports.j2ee.servlets;
import java.awt.Dimension;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.jasperreports.engine.JRConstants;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRImageRenderer;
import net.sf.jasperreports.engine.JRPrintImage;
import net.sf.jasperreports.engine.JRRenderable;
import net.sf.jasperreports.engine.JRWrappingSvgRenderer;
import net.sf.jasperreports.engine.export.JRHtmlExporter;
import net.sf.jasperreports.engine.type.ModeEnum;
import net.sf.jasperreports.engine.util.JRTypeSniffer;
/**
* @author Teodor Danciu (teodord@users.sourceforge.net)
* @version $Id: ImageServlet.java 3420 2010-02-18 09:17:47Z teodord $
*/
public class ImageServlet extends BaseHttpServlet
{
private static final long serialVersionUID = JRConstants.SERIAL_VERSION_UID;
/**
*
*/
public static final String IMAGE_NAME_REQUEST_PARAMETER = "image";
/**
*
*/
public void service(
HttpServletRequest request,
HttpServletResponse response
) throws IOException, ServletException
{
byte[] imageData = null;
String imageMimeType = null;
String imageName = request.getParameter(IMAGE_NAME_REQUEST_PARAMETER);
if ("px".equals(imageName))
{
try
{
JRRenderable pxRenderer =
JRImageRenderer.getInstance("net/sf/jasperreports/engine/images/pixel.GIF");
imageData = pxRenderer.getImageData();
imageMimeType = JRRenderable.MIME_TYPE_GIF;
}
catch (JRException e)
{
throw new ServletException(e);
}
}
else
{
List jasperPrintList = BaseHttpServlet.getJasperPrintList(request);
if (jasperPrintList == null)
{
throw new ServletException("No JasperPrint documents found on the HTTP session.");
}
JRPrintImage image = JRHtmlExporter.getImage(jasperPrintList, imageName);
JRRenderable renderer = image.getRenderer();
if (renderer.getType() == JRRenderable.TYPE_SVG)
{
renderer =
new JRWrappingSvgRenderer(
renderer,
new Dimension(image.getWidth(), image.getHeight()),
ModeEnum.OPAQUE == image.getModeValue() ? image.getBackcolor() : null
);
}
imageMimeType = JRTypeSniffer.getImageMimeType(renderer.getImageType());
try
{
imageData = renderer.getImageData();
}
catch (JRException e)
{
throw new ServletException(e);
}
}
if (imageData != null && imageData.length > 0)
{
if (imageMimeType != null)
{
response.setHeader("Content-Type", imageMimeType);
}
response.setContentLength(imageData.length);
ServletOutputStream ouputStream = response.getOutputStream();
ouputStream.write(imageData, 0, imageData.length);
ouputStream.flush();
ouputStream.close();
}
}
}