Jasper PDF export printing in Internet Explorer

protected static byte[] exportReportToPdf(JasperPrint jasperPrint) 

                                                      throws JRException {

  JRPdfExporter exporter = new JRPdfExporter();       

  ByteArrayOutputStream baos = new ByteArrayOutputStream();

 

  exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);

  exporter.setParameter(JRExporterParameter.OUTPUT_STREAM, baos);

  exporter.setParameter(JRPdfExporterParameter.PDF_JAVASCRIPT, 

              "this.print({bUI: true,bSilent: false,bShrinkToFit: true});");

 

  exporter.exportReport();        

  return baos.toByteArray();

}

 

We are using code like this to export a pdf from a jasper application.

 

The line

 

exporter.setParameter(JRPdfExporterParameter.PDF_JAVASCRIPT, 

             "this.print({bUI: true,bSilent: false,bShrinkToFit: true});");

 

adds Javacript to send the pdf document directly to the printer.

 

The expected behavior is that a print dialog will come up with a preview of the pdf document.

 

This works fine most of the time - except I am having problems about one out of every 5-6 times in Internet Explorer 8 and Firefox.

 

What happens is - the print preview dialog with the pdf does not appear or it appears with a blank document in the preview window.)

 

-I've tried a number of different javascripts (different params to this.print() via exporter.setParameter -I've tried setting different response headers such as

 

response.setContentType("application/pdf");

response.setHeader("Content-disposition","inline;  filename=\"" 

                   + reportName 

                   + "\"");

response.setContentLength(baos.size());

 

these did not seem to help

 

This seems to be an IE and FF issue. Has anyone ever dealt with this problem? I need to get it to work across all browsers 100% of the time. Perhaps a different approach to accomplish the goal of sending the pdf export directly to the printer? or a third party library that will work across browsers? Thanks for any advice.