Works like a charm.
I think i've learned something about resource download via ajax.
Thanks for hat.


Mit freundlichen Grüßen
Christian Giambalvo
--
Fachinformatiker für Anwendungsentwicklung

EXCELSIS Informationssysteme GmbH
Wilhelmsplatz 8 - 70182 Stuttgart
Mobile +49 176 196 32 406
Office +49 711 6 20 30 406
christian.giamba...@excelsisnet.com
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Geschäftsführer: Christian Sauter, Dr. Nils Herda, Frank Wolf

-----Ursprüngliche Nachricht-----
Von: Ernesto Reinaldo Barreiro [mailto:reier...@gmail.com] 
Gesendet: Dienstag, 6. Oktober 2009 11:31
An: users@wicket.apache.org
Betreff: Re: Send file to client via Ajax

Just sent it on my last e-mail! Here it is again!
import org.apache.wicket.IResourceListener;
import org.apache.wicket.markup.html.WebMarkupContainer;

/**
 * @author  Ernesto Reinaldo Barreiro (reier...@gmail.com)
 *
 */
public class DocumentResourceListener extends WebMarkupContainer implements
IResourceListener
{
private static final long serialVersionUID = 1L;
 private IResourceListener resourceListener;

/**
 * Constructor receiving an IResourceListener..
 *
 * @param id
 * @param resourceListener
 */
public DocumentResourceListener(final String id, IResourceListener
resourceListener)
{
super(id);
this.resourceListener = resourceListener;
}

/**
 * Gets the url to use for this link.
 *
 * @return The URL that this link links to
 */
protected CharSequence getURL()
{
return urlFor(IResourceListener.INTERFACE);
}


@Override
protected boolean getStatelessHint()
{
return false;
}
 public void onResourceRequested() {
this.resourceListener.onResourceRequested();
}
}

This is just a trick to have component that generates file contents on the
same page! I think you could used mounted resources as well, or just a
dedicated servlet if you want to get file generation out of wicket!

Best,

Ernesto

On Tue, Oct 6, 2009 at 11:24 AM, Giambalvo, Christian <
christian.giamba...@excelsisnet.com> wrote:

> Yes it would be usefull.
> But where does DocumentResourceListener came from?
> I'm using wicket 1.3.6 and DocumentResourceListener is not available.
>
> Thanks
>
> Mit freundlichen Grüßen
> Christian Giambalvo
> --
> Fachinformatiker für Anwendungsentwicklung
>
> EXCELSIS Informationssysteme GmbH
> Wilhelmsplatz 8 - 70182 Stuttgart
> Mobile +49 176 196 32 406
> Office +49 711 6 20 30 406
> christian.giamba...@excelsisnet.com
> www.excelsisnet.com
>
> Sitz Stuttgart
> Amtsgericht Stuttgart, HRB 21104
> Geschäftsführer: Christian Sauter, Dr. Nils Herda, Frank Wolf
>
>
> -----Ursprüngliche Nachricht-----
> Von: Ernesto Reinaldo Barreiro [mailto:reier...@gmail.com]
> Gesendet: Dienstag, 6. Oktober 2009 09:54
> An: users@wicket.apache.org
> Betreff: Re: Send file to client via Ajax
>
> Hi Cristian,
> I've got it working!
>
> Just place all the following files at the same package and you will get a
> working example (I tested them with FF35 and IE7).
>
> import org.apache.wicket.ajax.AjaxRequestTarget;
> import org.apache.wicket.ajax.markup.html.AjaxLink;
> import org.apache.wicket.markup.html.WebPage;
> import org.apache.wicket.markup.html.basic.Label;
> import org.apache.wicket.model.AbstractReadOnlyModel;
>
> /**
>  * @author  Ernesto Reinaldo Barreiro (reier...@gmail.com)
>  *
>  */
> public class TestPage extends WebPage{
>
> private Label text;
>  private String labelText = "Hi!";
>  private DocumentResourceListener documentResourceListener;
>
>  /**
>  *
>  */
> public TestPage() {
>  AjaxLink<Void> link = new AjaxLink<Void>("link") {
>  private static final long serialVersionUID = 1L;
>
> @Override
> public void onClick(AjaxRequestTarget target) {
> TestPage.this.labelText = "Hi! and donwload image!";
> if(target!= null) {
> target.addComponent(TestPage.this.text);
> String url = documentResourceListener.getURL().toString();
> target.appendJavascript(";alert('Hi');window.location.href='"+url+"';");
> }
> }
> };
>  add(link);
> text = new Label("text", new AbstractReadOnlyModel<String>() {
>  private static final long serialVersionUID = 1L;
>
> @Override
> public String getObject() {
> return TestPage.this.labelText;
> }
> });
> text.setOutputMarkupId(true);
> add(text);
>  documentResourceListener = new DocumentResourceListener("listener", new
> MyPdfResource());
>  add(documentResourceListener);
> }
>
> }
>
> ---------------------------
>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
>   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
> <html xmlns:wicket="org.apache.wicket">
> <head>
> </head>
> <body>
> <a wicket:id="link">Click Me</a>
> <span wicket:id="text"></span>
> <div wicket:id="listener"></div>
> </body>
> </html>
>
> ---------------------------------
>
> import java.io.ByteArrayOutputStream;
> import java.io.IOException;
> import java.io.InputStream;
> import java.io.OutputStream;
>
> import org.apache.wicket.markup.html.DynamicWebResource;
> import org.apache.wicket.protocol.http.WebResponse;
>
> /**
>  * @author  Ernesto Reinaldo Barreiro (reier...@gmail.com)
>  *
>  */
> public class MyPdfResource extends DynamicWebResource {
>
> private static final long serialVersionUID = 1L;
>
> static int BUFFER_SIZE = 10*1024;
>  /**
>  *
>  */
> public MyPdfResource() {
> }
>
> /* (non-Javadoc)
>  * @see org.apache.wicket.markup.html.DynamicWebResource#getResourceState()
>  */
> @Override
> protected ResourceState getResourceState() {
> return new ResourceState() {
>  @Override
> public String getContentType() {
> return "application/pdf";
> }
>  @Override
> public byte[] getData() {
> try {
> return bytes(MyPdfResource.class.getResourceAsStream("jta-1_1-spec.pdf"));
> } catch (Exception e) {
> return null;
> }
> }
> };
> }
>  public static  byte[] bytes(InputStream is) throws IOException {
> ByteArrayOutputStream out = new ByteArrayOutputStream();
> copy(is, out);
> return out.toByteArray();
> }
>  @Override
> protected void setHeaders(WebResponse response) {
> super.setHeaders(response);
> response.setAttachmentHeader("jta-1_1-spec.pdf");
> }
>  public static void copy(InputStream is, OutputStream os) throws
> IOException
> {
> byte[] buf = new byte[BUFFER_SIZE];
> while (true) {
> int tam = is.read(buf);
> if (tam == -1) {
> return;
> }
> os.write(buf, 0, tam);
> }
> }
> }
>
> Just replace "jta-1_1-spec.pdf" with your own PDF file on MyPdfResource and
> the exampel should work. An important bit here if
>
> @Override
> protected void setHeaders(WebResponse response) {
> ....
> response.setAttachmentHeader("jta-1_1-spec.pdf");
> }
>
> which makes the file to treated as an attachment instead of replacing the
> current page.
>
> Best,
>
> Ernesto
>
> P.S. Would it useful  to add this to Wicket's wiki?
>
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