Please create a Jira issue... > -----Original Message----- > From: Manyuan Jin [mailto:[EMAIL PROTECTED] > Sent: Monday, January 12, 2004 11:19 AM > To: [EMAIL PROTECTED] > Subject: [OS-webwork] A fix for JasperReportViewServlet > > > I am not aware if the issue has been solved by others, but > when I tried to use JasperReportViewServlet for displaying > charts/images in html files, it didn't work. Then I checked > the source code, there is a line marked "// todo fixme... > currently not working...". After exploring more on Jasper > report document, I got the problem solved. Basically we need > to load images from IMAGES_MAP. The following is the modified > code. Anybody can check the code and compile it into the lib? > > Thanks. > Manyuan Jin > > > /* > * Copyright (c) 2002-2003 by OpenSymphony > * All rights reserved. > */ > package com.opensymphony.webwork.views.jasperreports; > > import com.opensymphony.webwork.ServletActionContext; > import com.opensymphony.xwork.util.OgnlValueStack; > import dori.jasper.engine.*; > import dori.jasper.engine.export.*; > import org.apache.commons.logging.Log; > import org.apache.commons.logging.LogFactory; > > import javax.servlet.ServletException; > import javax.servlet.ServletOutputStream; > import javax.servlet.http.HttpServlet; > import javax.servlet.http.HttpServletRequest; > import javax.servlet.http.HttpServletResponse; > import java.io.ByteArrayOutputStream; > import java.io.File; > import java.io.IOException; > import java.util.HashMap; > import java.util.Map; > > > /** > * Provide a view of a webwork action as a jasper report. The > report format will be determined by > * the format parameter passed in the xwork action definition. > * Example action definition: > * > * <action name="jasperTest" > class="com.opensymphony.webwork.views.jasperreports.example.Or > derListAction" > > > * <param name="dataSource">orders</param> > * <param name="format">PDF</param> > * <result name="success" type="dispatcher"> > * <param name="location">orderList.jasper</param> > * </result> > * <interceptor-ref name="defaultStack"/> > * </action> > * > * Valid report format strings are the following: > * <ul> > * <li>PDF</li> > * <li>XML</li> > * <li>HTML</li> > * <li>XLS</li> > * <li>CSV</li> > * </ul> > * It will then look for a compiled report definition of the > form <code><view name>.jasper</code>, > * run it to the appropriate output format and stream the > results as the HTTP response. > * > * Ported to WebWork2: > * > * @author <a href="[EMAIL PROTECTED]">Rainer > Hermanns</a> > * @version $Id: JasperReportViewServlet.java,v 1.1 > 2003/10/03 05:45:27 cameronbraid Exp $ */ public class > JasperReportViewServlet extends HttpServlet implements > JasperReportConstants { > > //~ Static fields/initializers > ///////////////////////////////////////////// > protected static Log log = > LogFactory.getLog(JasperReportViewServlet.class); > > //~ Instance fields > //////////////////////////////////////////////////////// > > protected String IMAGES_URI = "/images/"; > > //~ Methods > //////////////////////////////////////////////////////////////// > > /* (non-Javadoc) > * @see javax.servlet.GenericServlet#init() > */ > public void init() throws ServletException { > super.init(); > > if (getServletConfig().getInitParameter("IMAGES_URI") > != null) { > IMAGES_URI = > getServletConfig().getInitParameter("IMAGES_URI"); > } > } > > > /** > * Service a HTTP request > * @param request the request to service > * @param response the response to send to the client > */ > public void service(HttpServletRequest request, > HttpServletResponse > response) throws ServletException { > String imageName=request.getParameter("image"); > //load image from IMAGES_MAP > if(imageName !=null){ > Map imagesMap = (Map) > request.getSession().getAttribute("IMAGES_MAP"); > if (imagesMap != null){ > byte[] imageData = (byte[]) imagesMap.get(imageName); > try{ > response.setContentLength(imageData.length); > ServletOutputStream ouputStream = response.getOutputStream(); > ouputStream.write(imageData, 0, imageData.length); > ouputStream.flush(); > ouputStream.close(); > } > catch(IOException ioe){ > log.warn(ioe.toString()); > } > } > } > else{ > //construct the data source for the report > OgnlValueStack stack = > ServletActionContext.getContext().getValueStack(); > String dataSource = "" + request.getAttribute("dataSource"); > OgnlValueStackDataSource stackDataSource = new > OgnlValueStackDataSource(stack, dataSource); > > //get the output format > String outputFormat = "" + request.getAttribute("format"); > // (Map) > ActionContext.getContext().getSession().get("IMAGES_MAP"); > if (outputFormat == null) { > outputFormat = FORMAT_PDF; > } > > if (!"contype".equals(request.getHeader("User-Agent"))) { > // Determine the directory that the report file > is in and set the reportDirectory parameter > String systemId = > getServletContext().getRealPath(request.getServletPath()); > Map parameters = new OgnlValueStackShadowMap(stack); > File directory = new File(systemId.substring(0, > systemId.lastIndexOf(File.separator))); > parameters.put("reportDirectory", directory); > > byte[] output = null; > JasperPrint jasperPrint = null; > > // Fill the report and produce a print object > try { > JasperReport jasperReport = > JasperManager.loadReport(systemId); > jasperPrint = > JasperFillManager.fillReport(jasperReport, > parameters, stackDataSource); > } catch (JRException e) { > log.error("Error building report for uri " + > systemId, e); > throw new ServletException(e.getMessage(), e); > } > > // Export the print object to the desired output format > try { > if (outputFormat.equals(FORMAT_PDF)) { > response.setContentType("application/pdf"); > > // > response.setHeader("Content-disposition", "inline; > filename=report.pdf"); > output = > JasperExportManager.exportReportToPdf(jasperPrint); > } else { > JRExporter exporter = null; > > if (outputFormat.equals(FORMAT_CSV)) { > response.setContentType("text/plain"); > exporter = new JRCsvExporter(); > } else if (outputFormat.equals(FORMAT_HTML)) { > response.setContentType("text/html"); > > Map imagesMap = new HashMap(); > > > request.getSession().setAttribute("IMAGES_MAP", > imagesMap); > exporter = new JRHtmlExporter(); > > exporter.setParameter(JRHtmlExporterParameter.IMAGES_MAP, imagesMap); > > exporter.setParameter(JRHtmlExporterParameter.IMAGES_URI, > "*.jasper?image="); > > } else if (outputFormat.equals(FORMAT_XLS)) { > > response.setContentType("application/vnd.ms-excel"); > exporter = new JRXlsExporter(); > } else if (outputFormat.equals(FORMAT_XML)) { > response.setContentType("text/xml"); > exporter = new JRXmlExporter(); > } else { > throw new ServletException("Unknown > report format: " > + outputFormat); > } > > output = exportReportToBytes(jasperPrint, > exporter); > } > } catch (JRException e) { > String message = "Error producing " + > outputFormat + " report for uri " + systemId; > log.error(message, e); > throw new ServletException(e.getMessage(), e); > } > > response.setContentLength(output.length); > > ServletOutputStream ouputStream; > > try { > if (log.isDebugEnabled()) { > //log.debug("Writing " + output.length + > " bytes to output stream"); > } > > ouputStream = response.getOutputStream(); > ouputStream.write(output); > ouputStream.flush(); > ouputStream.close(); > } catch (IOException e) { > log.error("Error writing report output", e); > throw new ServletException(e.getMessage(), e); > } > } else { > // Code to handle "contype" request from IE > try { > ServletOutputStream outputStream; > response.setContentType("application/pdf"); > response.setContentLength(0); > outputStream = response.getOutputStream(); > outputStream.close(); > } catch (IOException e) { > log.error("Error writing report output", e); > throw new ServletException(e.getMessage(), e); > } > } > } > } > > /** > * Run a Jasper report to CSV format and put the results > in a byte array > * @param jasperPrint The Print object to render as CSV > * @param exporter The exporter to use to export the report > * @return A CSV formatted report > * @throws dori.jasper.engine.JRException If there is a > problem running the report > */ > private byte[] exportReportToBytes(JasperPrint > jasperPrint, JRExporter > exporter) throws JRException { > byte[] output; > ByteArrayOutputStream baos = new ByteArrayOutputStream(); > > exporter.setParameter(JRExporterParameter.JASPER_PRINT, > jasperPrint); > > exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, baos); > > exporter.exportReport(); > > output = baos.toByteArray(); > > return output; > } > } > > > > ------------------------------------------------------- > This SF.net email is sponsored by: Perforce Software. > Perforce is the Fast Software Configuration Management System > offering advanced branching capabilities and atomic changes > on 50+ platforms. Free Eval! > http://www.perforce.com/perforce/loadprog.html > > _______________________________________________ > Opensymphony-webwork mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/opensymphony-webwork >
------------------------------------------------------- This SF.net email is sponsored by: Perforce Software. Perforce is the Fast Software Configuration Management System offering advanced branching capabilities and atomic changes on 50+ platforms. Free Eval! http://www.perforce.com/perforce/loadprog.html _______________________________________________ Opensymphony-webwork mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/opensymphony-webwork
