Filedownload and progressbar

[Michael Heinen <mh...@recommind.com>]

Hi all,

 

One of my backingBeans contains a method that returns a file for
download.

This is working fine and the standard Open/Save/Cancel box pops up. No
problem.

 

In addition I display always a "work on progress message" with a
javascript call when my form is submitted (onSubmit).

The problem is now that I don't know how to disable this message again
when the file is ready for download. 

There is no event on which I can react in the browser. The original page
is not reloaded (and should not be reloaded).

 

Can I use a second jsp which calls the showOriginalDocument action and
does a javascript call in the parent window (or openener)?

Does anybody have an idea?

 

JSP:

<h:commandLink action="#{MyBean.showOriginalDocument}" immediate="true">

   <t:graphicImage url="/images/out.jpg" />

</h:commandLink>

 

 

BackingBean:

public void showOriginalDocument() {

            ..

            NativeDocument nativeDocument =
this.delegate.getOriginalDocument(this.document.getDocumentId());

            HttpServletResponse response =
(HttpServletResponse)facesContext.getExternalContext().getResponse();

            response.setContentType(nativeDocument.getMimeType());

 
response.setHeader("Content-Disposition","attachment;filename=\""+
this.document.getAttribute("docnumber")+nativeDocument.getSuffix() +
"\"");

 
response.setContentLength(nativeDocument.getDocument().length);

            OutputStream responseStream =
((HttpServletResponse)facesContext.getExternalContext().getResponse()).g
etOutputStream();

            responseStream.write(nativeDocument.getDocument());

            response.flushBuffer();

            facesContext.responseComplete();

 

 

Michael

Re: Filedownload and progressbar

[Dave Brondsema <da...@brondsema.net>]

http://today.java.net/pub/a/today/2006/02/09/file-uploads-with-ajax-and-jsf.html
might help.

Michael Heinen wrote:
> Hi all,
> 
>  
> 
> One of my backingBeans contains a method that returns a file for download.
> 
> This is working fine and the standard Open/Save/Cancel box pops up. No
> problem.
> 
>  
> 
> In addition I display always a "work on progress message" with a
> javascript call when my form is submitted (onSubmit).
> 
> The problem is now that I don't know how to disable this message again
> when the file is ready for download.
> 
> There is no event on which I can react in the browser. The original page
> is not reloaded (and should not be reloaded).
> 
>  
> 
> Can I use a second jsp which calls the showOriginalDocument action and
> does a javascript call in the parent window (or openener)?
> 
> Does anybody have an idea?
> 
>  
> 
> JSP:
> 
> <h:commandLink action="#{MyBean.showOriginalDocument}" immediate="true">
> 
>    <t:graphicImage url="/images/out.jpg" />
> 
> </h:commandLink>
> 
>  
> 
>  
> 
> BackingBean:
> 
> public void showOriginalDocument() {
> 
>             ..
> 
>             NativeDocument nativeDocument =
> this.delegate.getOriginalDocument(this.document.getDocumentId());
> 
>             HttpServletResponse response =
> (HttpServletResponse)facesContext.getExternalContext().getResponse();
> 
>             response.setContentType(nativeDocument.getMimeType());
> 
>            
> response.setHeader("Content-Disposition","attachment;filename=\""+ 
> this.document.getAttribute("docnumber")+nativeDocument.getSuffix() + "\"");
> 
>             response.setContentLength(nativeDocument.getDocument().length);
> 
>             OutputStream responseStream =
> ((HttpServletResponse)facesContext.getExternalContext().getResponse()).getOutputStream();
> 
>             responseStream.write(nativeDocument.getDocument());
> 
>             response.flushBuffer();
> 
>             facesContext.responseComplete();
> 
>  
> 
>  
> 
> Michael
> 


-- 
Dave Brondsema
Software Developer
Cornerstone University