I wound up using a Restlet instead of a Redirector or Filter, as I
couldn't see how the infrastruture there helped me.
It could be due to some miswiring on my side that I I need to use
application.handle(), but that's what works for me.
public abstract class MyFilter extends Restlet {
private final Application application;
MyFilter(Application application) { this.application = application; }
protected Reference getTargetRef(Request request, Response response);
@Override
public void handle(Request request, Response response) {
Reference targetRef = getTargetRef(request, response);
Reference resourceRef = request.getResourceRef();
request.setResourceRef(targetRef);
application.handle(request, response);
response.setEntity(response.getEntity());
request.setResourceRef(resourceRef);
}
}
Leigh.
On 02/11/2011 11:36 AM, Leigh L. Klotz, Jr. wrote:
>
> I just was about to send a similar message.
>
> I'd like to have a filter which does the following:
>
> 1. Versioned resources
> /path/to/resources/{thing}/a/b/c --> /path/to/resource/a/b/c but with
> {thing} available in a request attribute.
>
> 2. Resource aliases
> /path/to/resources/foo/{thing}/a/b/c -->
> /path/to/resource/foo/otherthing/a/b/c where the filter does the mapping
> of "thing" to "otherthing"
>
> In neither case do I want the headers removed; I want them transparently
> passed through/
>
> Use cases:
>
> 1. {thing} is an API version, a schema version, or some other piece of
> metadata which I can use to encourage clients to cache responses
> forever, but which is optional. Using query strings for this purpose
> fails because it requires you to avoid conflicts with every possible
> resource. Using a URI path component works because you can provide
> /path/to/resources/v123 as the root for clients of a particular vintage
> or time scale.
>
> 2. {thing} is an alias for some other thing. For example "User" could
> be an alias for current user id.
>
> In Restlet 2.0.1, so far failed..
>
> For #1, I see no way to do it and need help.
>
> For #2, I interpose a starts_with template matcher for each resource
> under "/path/to/resources", and it decide dynamically between calling
> the real resource or doing a Redirector.MODE_CLIENT_TEMPORARY to the
> rewritten resource, which of course goes back to the client. The client
> redirect is especially unpleasant.
>
>
> Leigh.
>
> ------------------------------------------------------
> http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2703463
>
> <http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2703463>
>
>
>
------------------------------------------------------
http://restlet.tigris.org/ds/viewMessage.do?dsForumId=4447&dsMessageId=2704679
