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()),
						JRElement.MODE_OPAQUE == image.getMode() ? 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();
		}
}