OK, I've tried to create an unversioned page to keep the URL stable using
following page code:
> public class DownloadFile extends TemplatePage {
>
> // Constants
> ==============================================================
>
> private static final String FILE_PARAMETER = "file";
>
> // Static
> =================================================================
>
> public static BookmarkablePageLink createLinkToPage(String id, String
> file) {
> final BookmarkablePageLink pageLink = new
> BookmarkablePageLink(id, DownloadFile.class);
> pageLink.setParameter(FILE_PARAMETER, file);
> return pageLink;
> }
>
> // Setup
> ==================================================================
>
> public DownloadFile(PageParameters parameters) {
> final String file = parameters.getString(FILE_PARAMETER);
> if (file == null) {
> throw new
> RestartResponseAtInterceptPageException(Download.class);
> }
>
> if (!getOurSession().isLicenseAgreed()) {
> addContent(createLicenseFragment("contentPanel",
> parameters));
> throw new RestartResponseAtInterceptPageException(this);
> }
>
> addContent(createDownloadFragment("contentPanel", file));
> }
>
> // Utils
> ==================================================================
>
> private Fragment createDownloadFragment(String id, String file) {
> final Fragment fragment = new Fragment(id, "downloadFragment");
> fragment.add(new Label("file", file));
> return fragment;
> }
>
> private Fragment createLicenseFragment(String id, final PageParameters
> parameters) {
> final Fragment fragment = new Fragment(id, "licenseFragment");
> fragment.add(new PageLink("accept", new IPageLink() {
> public Page getPage() {
> getOurSession().setLicenseAgreed(true);
> return new DownloadFile(parameters);
> }
>
> public Class getPageIdentity() {
> return DownloadFile.class;
> }
> }));
> return fragment;
> }
>
> public boolean isVersioned() {
> return false;
> }
> }
Every page is mounted with QueryStringUrlCodingStrategy. On the Download
page a link to this DownloadFile page is created using the above
createLinkToPage() static method call which creates a link to
"http://localhost:8080/smartcvs/download-file.html?file=win32jre";
Curiously, when I click on it, the browser displays
"http://localhost:8080/?wicket:interface=:2::"; as URL. The "accept"-link
occurs pointing to
"http://localhost:8080/?wicket:interface=:2:border:contentPanel:accept::ILinkListener";.
When I click it, the browser displays
"http://localhost:8080/?wicket:interface=:3::"; as URL. Clicking the
back-button shows the "http://localhost:8080/?wicket:interface=:2::"; page
with the "accept"-link, no matter whether I try it with Opera or FireFox.
Tom
Eelco Hillenius wrote:
>> Regarding the back-button: it would be the best if the intermediate license
>> agreement page would not occur when pressing the back-button, but instead
>> the previous page (if any). Is something like that possible?
>
> What you need to achieve is that the URL stays stable. One way to
> achieve this is to use panel replacement. E.g. when you click the
> download page, you replace the main panel on your page with a panel
> that displays the license agreement. If you turn off versioning for
> that page, the URL will stay stable and thus if you push the back
> button later, your browser will return to the first version of the
> page. I think this should work for most browsers (maybe only not with
> Opera). There are alternative ways to do this, including throwing
> RestartResponseExceptions, using custom page factories and custom url
> coding strategies. Or you can trick the browser using JavaScript, of
> which I don't know too many details.
>
> Eelco
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