Stream a PDF to response

Question

Hello...
I'm trying to stream a generated pdf file (jasperreports) to the response in an AbstractPortalComponent. The Code looks like follows...
public class HelloWorld extends AbstractPortalComponent
    JasperPrint jprint;
    JasperReport report;
    Map parameters;
    public void doContent(IPortalComponentRequest request, IPortalComponentResponse response)
try
  //input parameters
  parameters = new HashMap();                                                                     
  //path to report
  IResource res = request.getResource(IResource.SCRIPT, "reports/SAPPortalPDF.jasper");
  String path = res.getResourceInformation().getSource();
  //jasper print object
  jprint = JasperFillManager.fillReport(path, parameters, new JREmptyDataSource());
//output data in byte[]-object                                   
byte[] bytes = JasperExportManager.exportReportToPdf(jprint);
Writer w = response.getWriter();
//Content-Type setzen
PortalComponentContentType content = PortalComponentContentType.parse("application/pdf");               
response.setContentType(content);                                                            
response.write(response.getContentType().toString());                         
catch(Exception e)
               response.write(e.toString());
               response.write(e.getLocalizedMessage());
               response.write(e.getCause().toString());
It seems to work fine, but the data is not shown as a pdf file. I get all the characters displayed, which are in the byte array. So there are two possibilities... either the way I stream the data to the response is not correct or there are problemes concerning the mime-type. If I put out the mime-type of the response, it says "application/pdf". So this seems to be correct...
any ideas ????
Greets, Jochen

Answer 1

Hi
Hope the following will help. it's based on some code i writed some times ago.
If i remember, the idea is to write into a response object that is not the one given as a parameter.
regards
Guillaume
//output data in byte[]-object                                   
byte[] bytes = JasperExportManager.exportReportToPdf(jprint);
// write bytes to response stream
HttpServletResponse res = request.getServletResponse(true);
res.setContentType("application/pdf");
ServletOutputStream os = res.getOutputStream();
os.write(bytes);
os.close();