net.sf.jasperreports.web.util.ImageWebResourceHandler Maven / Gradle / Ivy
/*
* JasperReports - Free Java Reporting Library.
* Copyright (C) 2001 - 2013 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 .
*/
package net.sf.jasperreports.web.util;
import java.awt.Dimension;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRPrintImage;
import net.sf.jasperreports.engine.JRRuntimeException;
import net.sf.jasperreports.engine.JRWrappingSvgRenderer;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReportsContext;
import net.sf.jasperreports.engine.Renderable;
import net.sf.jasperreports.engine.RenderableUtil;
import net.sf.jasperreports.engine.export.HtmlExporter;
import net.sf.jasperreports.engine.type.ImageTypeEnum;
import net.sf.jasperreports.engine.type.ModeEnum;
import net.sf.jasperreports.engine.type.RenderableTypeEnum;
import net.sf.jasperreports.web.WebReportContext;
import net.sf.jasperreports.web.servlets.JasperPrintAccessor;
/**
* @author Teodor Danciu ([email protected])
* @version $Id: ImageServlet.java 5880 2013-01-07 20:40:06Z teodord $
*/
public class ImageWebResourceHandler implements WebResourceHandler
{
/**
*
*/
public static final String REQUEST_PARAMETER_IMAGE_NAME = "image";
/**
*
*/
public boolean handleResource(JasperReportsContext jasperReportsContext, HttpServletRequest request, HttpServletResponse response)
{
String imageName = request.getParameter(REQUEST_PARAMETER_IMAGE_NAME);
if (imageName == null)
{
return false;
}
byte[] imageData = null;
String imageMimeType = null;
if ("px".equals(imageName))
{
try
{
Renderable pxRenderer =
RenderableUtil.getInstance(jasperReportsContext).getRenderable("net/sf/jasperreports/engine/images/pixel.GIF");
imageData = pxRenderer.getImageData(jasperReportsContext);
imageMimeType = ImageTypeEnum.GIF.getMimeType();
}
catch (JRException e)
{
throw new JRRuntimeException(e);
}
}
else
{
WebReportContext webReportContext = WebReportContext.getInstance(request, false);
if (webReportContext == null)
{
throw new JRRuntimeException("No web report context found.");
}
JasperPrintAccessor jasperPrintAccessor = (JasperPrintAccessor) webReportContext.getParameterValue(
WebReportContext.REPORT_CONTEXT_PARAMETER_JASPER_PRINT_ACCESSOR);
if (jasperPrintAccessor == null)
{
throw new JRRuntimeException("No JasperPrint found in report context.");
}
List jasperPrintList = Collections.singletonList(jasperPrintAccessor.getJasperPrint());
JRPrintImage image = HtmlExporter.getImage(jasperPrintList, imageName);
Renderable renderer = image.getRenderable();
if (renderer.getTypeValue() == RenderableTypeEnum.SVG)
{
renderer =
new JRWrappingSvgRenderer(
renderer,
new Dimension(image.getWidth(), image.getHeight()),
ModeEnum.OPAQUE == image.getModeValue() ? image.getBackcolor() : null
);
}
imageMimeType = renderer.getImageTypeValue().getMimeType();
try
{
imageData = renderer.getImageData(jasperReportsContext);
}
catch (JRException e)
{
throw new JRRuntimeException(e);
}
}
if (imageData != null && imageData.length > 0)
{
if (imageMimeType != null)
{
response.setHeader("Content-Type", imageMimeType);
}
response.setContentLength(imageData.length);
ServletOutputStream outputStream = null;
try
{
outputStream = response.getOutputStream();
outputStream.write(imageData, 0, imageData.length);
outputStream.flush();
}
catch (IOException e)
{
throw new JRRuntimeException(e);
}
finally
{
if (outputStream != null)
{
try
{
outputStream.close();
}
catch (IOException e)
{
}
}
}
}
return true;
}
}