Got it - found another hint about DownloadLink that led me to this solution:
@Override
public void onSubmit() {
ReportResource resource = new PdfReportResource(getReportName(),
getParamsModel());
getRequestCycle().scheduleRequestHandlerAfterCurrent(
new ResourceRequestHandler(resource, null));
}
So simple, but it took some digging to find so hope this helps someone else.
-- Jim.
On Fri, Oct 21, 2011 at 2:44 PM, Jim Pinkham <pinkh...@gmail.com> wrote:
> OK, I've almost got it - thanks for the example.
>
> It comes down to either using a ResourceLink<Void> which serves up the pdf
> with no complaints, but despite being attached to a submit button, the form
> doesn't seem to have been submitted; the parameters don't reflect any user
> input
>
> or, I can solve that if I use a Button instead, and copy this code from
> ResourceLink.onResourceRequested into the Button's onSubmit()...
>
>
> Attributes a = new Attributes(RequestCycle.get().getRequest(),
> RequestCycle.get()
> .getResponse(), null);
> resource.respond(a);
>
> But if I do that, it works but then I get "Header was already written to
> response!" as mentioned earlier.
>
> I also tried making my own MyResourceLink (I would rather have extended
> ResourceLink but I had to go all the way back to Link because ResourceLink's
> onResourceRequested is final) and I put a call to
> ParamsForm.this.process(this); then super.onResourceRequested(), and that
> stopped the error but still didn't submit the form.
>
> Has anyone found a way to get the best of both? I found SubmitLink, but I
> guess I need some way to 'mix that in', or decorate the ResourceLink with a
> submit first... not sure how to do that.. (ResourceLink already implements
> IFormSubmittingComponent, but I guess that's not enough)
>
> (I tried calling inputField.getConvertedInput() like I might do from a
> validator but that just returns null, which is what leads me to believe the
> form hasn't been submitted)
>
> Thanks,
> -- Jim.
>
>
> On Wed, Oct 19, 2011 at 11:55 PM, Martin Grigorov <mgrigo...@apache.org>wrote:
>
>> On Wed, Oct 19, 2011 at 11:46 PM, Paul Szulc <paul.sz...@gmail.com>
>> wrote:
>> > Ok, below the code I use to create a link that allows to download pdf
>> file
>> > created by jasper on runtime. Hope it helps. Do not hesitate to ask
>> > questions.
>> >
>> >
>> > public class PdfGenerateLink extends ResourceLink<Void> {
>> >
>> > public PdfGenerateLink(final String id, final IModel<Bid> model,
>> final
>> > PdfBuilderFromBidCreator creator) {
>> >
>> > super(id, new WebResource() {
>> > @Override
>> > public IResourceStream getResourceStream() {
>> > IResourceStream resourceStream = new
>> > AbstractResourceStreamWriter() {
>> >
>> > public void write(OutputStream output) {
>> > try {
>> > generate(output, model.getObject());
>> > } catch (Exception e) {
>> > throw new RuntimeException(e);
>> > }
>> > }
>> >
>> > private void generate(OutputStream output, Bid bid)
>> > throws Exception {
>> > PdfOfertaDocumentBuilder pdf =
>> creator.create(bid);
>> Oferta ?!
>> This sounds like Bulgarians are involved here :-)
>> > InputStream generate = pdf.generate();
>> > byte[] buffer = new byte[1024];
>> > while (generate.read(buffer) != -1) {
>> > output.write(buffer);
>> > }
>> > generate.close();
>> > }
>> >
>> > public String getContentType() {
>> > return "application/pdf";
>> > }
>> > };
>> >
>> > return resourceStream;
>> > }
>> >
>> > @Override
>> > protected void setHeaders(WebResponse response) {
>> > super.setHeaders(response);
>> > response.setCharacterEncoding("UFT-8");
>> > response.setHeader("Expires", "0");
>> > response.setHeader("Cache-Control", "no-cache");
>> > response.setHeader("Cache-Control", "must-revalidate,
>> > post-check=0, pre-check=0");
>> > response.setHeader("Pragma", "public");
>> >
>> >
>> response.setAttachmentHeader(model.getObject().getPublicTask().getName().replace("
>> > ", "_") + ".pdf");
>> > }
>> > });
>> > add(createImage("icon", "pdficon16.png"));
>> > }
>> > }
>> >
>> > On Tue, Oct 18, 2011 at 8:43 PM, Jim Pinkham <pinkh...@gmail.com>
>> wrote:
>> >
>> >> Paul,
>> >>
>> >> I am doing something very similar - I'd be interested to know more
>> about
>> >> how you got this working - here is what I've got that works for now,
>> but I'm
>> >> not real happy with it:
>> >>
>> >> In my report forms, I have buttons like this: (details about params
>> >> omitted - nothing fancy there)
>> >>
>> >> add(new MyReportResourceButton("pdf", new
>> >> ReportResource("MyReport", new PdfResourceHandler()), paramsModel));
>> >> add(new MyReportResourceButton("xls", new
>> >> ReportResource("MyReport", new XlsResourceHandler()), paramsModel));
>> >>
>> >> (So it will load MyReport.jasper that was compiled and put into
>> resources
>> >> folder by maven plugin during build)
>> >>
>> >> MyReportResourceButton has this:
>> >> @Override
>> >> public final void onResourceRequested() {
>> >> Map<String,Object> params = paramsModel.getObject();
>> >> resource.setReportParameters(params);
>> >> super.onResourceRequested();
>> >> }
>> >>
>> >> and it's superclass MyResourceButton has this:
>> >> @Override
>> >> public void onSubmit() {
>> >> onResourceRequested();
>> >> }
>> >>
>> >> /**
>> >> * @see org.apache.wicket.IResourceListener#onResourceRequested()
>> >> */
>> >> public void onResourceRequested()
>> >> {
>> >> Attributes a = new Attributes(RequestCycle.get().getRequest(),
>> >> RequestCycle.get()
>> >> .getResponse(), null);
>> >> resource.respond(a);
>> >> }
>> >>
>> >>
>> >> At runtime, it basically works, however, it gives me this annoying
>> message
>> >> in my logs multiple times per report request after the report has been
>> >> served and it appears to be trying to just stay on the same page:
>> >>
>> >> 2011-10-13 15:22:42,381 [http-80-12] ERROR
>> >> org.apache.wicket.DefaultExceptionMapper - Unexpected error occurred
>> >> java.lang.IllegalStateException: Header was already written to
>> response!
>> >> at
>> >>
>> org.apache.wicket.protocol.http.HeaderBufferingWebResponse.checkHeader(HeaderBufferingWebResponse.java:64)
>> >> at
>> >>
>> org.apache.wicket.protocol.http.HeaderBufferingWebResponse.sendRedirect(HeaderBufferingWebResponse.java:112)
>> >> at
>> >>
>> org.apache.wicket.request.handler.render.WebPageRenderer.redirectTo(WebPageRenderer.java:136)
>> >> at
>> >>
>> org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:261)
>> >> at
>> >>
>> org.apache.wicket.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:139)
>> >> at
>> >>
>> org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:717)
>> >> at
>> >>
>> org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:63)
>> >> at
>> >>
>> org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:96)
>> >> at
>> >>
>> org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:212)
>> >> at
>> >>
>> org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:253)
>> >> at
>> >>
>> org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:160)
>> >> at
>> >>
>> org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:216)
>> >>
>> >> Could you tell me if there is some way this differs from how you (or
>> your
>> >> contractor) are doing it?
>> >>
>> >> Thanks,
>> >> -- Jim.
>> >>
>> >> On Tue, Oct 18, 2011 at 3:58 AM, Paul Szulc <paul.sz...@gmail.com>
>> wrote:
>> >>
>> >>> yeah, ok, my bad
>> >>>
>> >>> resources where under src/main/resource not src/main/resource*s*
>> >>> *
>> >>> *
>> >>> thx Tor
>> >>>
>> >>
>> >>
>> >
>> >
>> > --
>> > Best regards,
>> > Paul Szulc
>> >
>> > http://www.paulszulc.com
>> >
>>
>>
>>
>> --
>> Martin Grigorov
>> jWeekend
>> Training, Consulting, Development
>> http://jWeekend.com
>>
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>>
>
