Isn't it possible to create a dynamic WEB resource the generates your XML
and then feed this XML to Big Faceless PDF library for creating the PDF? And
them stream back the PDF? I haven't used that library myself but I guess
that would be possible??
Best,
Ernesto
On Tue, Feb 23, 2010 at 8:30 AM, Geir Eilertsen <geir.eilert...@gmail.com>wrote:
> I'm using Big Faceless PDF library to generate a PDF from a dynamic
> Wicket Page which renders XML.
>
> I have tried different approaches, but the only one I get to work is by
> plugging a filter into the app using:
>
> getRequestCycleSettings().addResponseFilter(new
> FacelessResponseFilter());
>
> filter code:
>
> public class FacelessResponseFilter implements IResponseFilter
> {
> static
> {
> ReportParser.setLicenseKey("SOME KEY");
> }
>
> @Override
> public AppendingStringBuffer filter(AppendingStringBuffer
> responseBuffer)
> {
> if (responseBuffer.indexOf("big.faceless.org") == -1)
> {
> return responseBuffer;
> }
> ReportParser parser = null;
> try
> {
> parser = ReportParser.getInstance();
> }
> catch (SAXException e)
> {
> e.printStackTrace();
> }
> WebRequestCycle requestCycle = (WebRequestCycle)
> RequestCycle.get();
> BufferedWebResponse wr = (BufferedWebResponse)
> requestCycle.getWebResponse();
> wr.setAttachmentHeader("pdfFile.pdf");
> wr.setContentType("application/pdf");
> InputSource is = new InputSource(new
> StringReader(responseBuffer.toString()));
> OutputStream out = wr.getOutputStream();
> is.setSystemId("/");
> PDF parse;
>
> try
> {
> parse = parser.parse(is);
> parse.render(out);
> }
> catch (IOException e)
> {
> e.printStackTrace();
> }
> catch (SAXException e)
> {
> e.printStackTrace();
> }
> return new AppendingStringBuffer();
> }
> }
>
> Page code:
>
> public class CountryListXMLPage extends Page
> {
> private boolean stripTagsSettingBeforeThisPageLoad;
>
> public CountryListXMLPage()
> {
> add(new ListView<Country>("countryList", new
> CountryListModel())
> {
> private static final long serialVersionUID = 1L;
>
> @Override
> protected void populateItem(final ListItem<Country>
> listItem)
> {
> listItem.add(new Label("name",
> listItem.getModelObject().getName()));
>
> Region region =
> listItem.getModelObject().getRegion();
> listItem.add(new Label("region.name",
> region == null ? "" :
> region.getName()));
>
> }
> });
> }
>
> @Override
> protected void onBeforeRender() {
> stripTagsSettingBeforeThisPageLoad =
> Application.get().getMarkupSettings().getStripWicketTags();
>
> Application.get().getMarkupSettings().setStripWicketTags(true);
> super.onBeforeRender();
> }
>
>
> @Override
> protected void onAfterRender() {
>
>
> Application.get().getMarkupSettings().setStripWicketTags(stripTagsSettingBeforeThisPageLoad);
> super.onAfterRender();
> }
>
> @Override
> public String getMarkupType()
> {
> return "xml";
> }
>
> class CountryListModel extends
> LoadableDetachableModel<List<Country>>
> {
> private static final long serialVersionUID = 1L;
>
> @Override
> protected List<Country> load()
> {
> SolidApplication app =
> (SolidApplication)SolidApplication.get();
> return app.getDomainService().getCountries();
> }
> }
>
> }
>
> I have a Link loading this page and get the PDF download OK, but since
> the filter hijacks the OutputStream, I get the error:
>
> [ERROR,WebResponse,http-8080-1] Unable to redirect
> to: ?wicket:interface=:2::::, HTTP Response has already been committed.
> [ERROR,WicketFilter,http-8080-1] closing the buffer error
> java.lang.IllegalStateException
> at
>
> org.apache.catalina.connector.ResponseFacade.sendRedirect(ResponseFacade.java:435)
> at
>
> javax.servlet.http.HttpServletResponseWrapper.sendRedirect(HttpServletResponseWrapper.java:136)
> ...
>
>
> Does anyone know about a better way to do what I'm trying here?
>
> Geir
>
