File(data) Download problem...

[waheed.murad]

i am using seam-gen. i am trying to dowload a file or data from server as file. my code is

FACELETS CODE:
<h:commandButton value="donwload file" actionListener="#{ERegReportHandlerAction.downloadReportFile}"/>

Sessionbean Function:

public void downloadReportFile(){

ExternalContext exContext=FacesContext.getCurrentInstance().getExternalContext();
javax.servlet.http.HttpServletResponse response = ((javax.servlet.http.HttpServletResponse)exContext.getResponse());

//response.setContentType("application/x-download");
response.setContentType("text/plain");
response.setHeader("Content-Disposition", "attachment; filename=" + "test.csv");


try{
OutputStream out = response.getOutputStream( );

byte[] arr=("This is the file data.").getBytes();
response.setContentLength(arr.length);
out.write(arr);
out.close();
}catch(Exception e){
System.out.println("Error: " + e.getMessage() );
}

}

--------------------------------------------------------------------
file is downloaded but when i open it, i have the contents written by me(i.e This is the file data) plus the whole html page source code from where i pressed the download button.
any help regarding this plz.

[jazir1979]

Hi,

I'm doing something similar to you for exporting jasper reports (JasperPrint) objects to various output formats.

I think perhaps you are missing the call to FacesContext.responseComplete(), but I will show you all of my code, because there are also various flush() and close() calls in there which I found were necessary...

 final HttpServletResponse response =
 (HttpServletResponse) context.getExternalContext().getResponse();
 final OutputStream responseStream = response.getOutputStream();
 response.setContentLength(stream.size());
 response.setContentType(contentTypes.get(outputType));
 if (outputType != ReportOutputType.HTML) {
 response.setHeader("Content-Disposition", "attachment; filename=report." + outputType);
 }
 responseStream.write(stream.toByteArray());
 responseStream.flush();
 responseStream.close();
 response.flushBuffer();
 context.responseComplete();

[newlukai]

Hi jazir,

I tried your code in my application where I get a file out of a database blob and want to send it to the browser.

But I ran into a NullPointerException, since I don't get a HttpServletResponse object from the FacesContext object. Could it be that I inject the wrong context?

@In
private FacesContext context;

Or is it because I use ICEfaces, that I can't get a HttpServletResponse? Has somebody implemented a file download with ICEfaces?

Thanks in advance
Newlukai

[newlukai]

I got it. Almost. I'm stuck on a Seam/ICEfaces integration problem with embedded JavaScript.