RE: FileDownload capability?

[CONNER, BRENDAN \(SBCSI\)]

Thanks.  In your example, does one have to first write out the data to a
file on the server?  I see you set the header with
attachment;filename=..., but then I also see that you have
responseStream.write(selectedContent.getContentDate().getData()).

- Brendan

-----Original Message-----
From: Mike Kienenberger [mailto:[EMAIL PROTECTED] 
Sent: Friday, October 21, 2005 2:41 PM
To: MyFaces Discussion
Subject: Re: FileDownload capability?


Here's one way.

Note that facesContext.getResponseStream() is only valid during the
render-response phase, so you'll have to access the HttpRequest
directly (not sure how it works for portlets).


    public String downloadContentData()
    {
        Content selectedContent =
(Content)this.announcementContentDataList.getRowData();
        FacesContext facesContext = FacesContext.getCurrentInstance();
        // OutputStream responseStream =
facesContext.getResponseStream();

        try
        {
            OutputStream responseStream =
((HttpServletResponse)facesContext.getExternalContext().getResponse()).g
etOutputStream();
            if (null == responseStream)  throw new
AbortProcessingException("responseStream is null");

            HttpServletResponse response =
(HttpServletResponse)facesContext.getExternalContext().getResponse();
            response.setContentType(selectedContent.getContentType());
 
response.setHeader("Content-Disposition","attachment;filename=\""
+ selectedContent.getContentId() + "\"");
 
response.setContentLength(selectedContent.getContentData().getData().len
gth);
 
responseStream.write(selectedContent.getContentData().getData());

            response.flushBuffer();
        }
        catch (IOException exception)
        {
            // TODO Auto-generated catch block
            exception.printStackTrace();
        }

        facesContext.responseComplete();

        return null;
    }



On 10/21/05, CONNER, BRENDAN (SBCSI) <[EMAIL PROTECTED]> wrote:
> We have an application requirement saying that the user needs the
> ability to push a button on our report page to download the report
data
> into a local file on the user's machine suitable for loading into a
> spreadsheet.  How can something like this be done?
>
> - Brendan
>