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Posted to users@tapestry.apache.org by neo anderson <ja...@yahoo.co.uk> on 2009/09/10 19:06:45 UTC
Re: T5: AccessController Dispatcher asm.exists() not working?
I am trying to do authorization stuff, but how to configure so that
UserPermissions.class can be obtained using
ApplicationStateManger.exists(UserPermissions.class) method?
What I want to do is
user request -> AccessController (Dispatcher) -> News (Page)
User will click the url and then AccessController will check using
ApplicationStateManager.exists() method, in which to check if user has
privilege to access to the Page `News' class.
I check the SessionApplicationStatePersistenceStrategy.java, discovering
that it will lookup http session to see if class exists or not, but I can
not figure out how to get UserPermission created so that when executing
ApplicationStateManager.exists(), it will return true.
public <T> boolean exists(Class<T> ssoClass)
{
String key = buildKey(ssoClass);
Session session = request.getSession(false);
return session != null && session.getAttribute(key) != null;
}
In addition, after reading the chenillenKit source code, I disocover that
seemingly ChenilleKitAccessModule will build the AccessValidator (the same
as UserPermission) first and then directly using that instance in
PageRenderAccessFilter (that implements PageRenderRequestFilter).
ChenilleKitAccessModule.java
public static AccessValidator buildAccessValidator(ComponentSource
componentSource, ...){
...
return new AccessValidatorImpl(componentSource, locator, logger, manager,
webSessionUserClass);
}
PageRenderAccessFilter.java
public void handle(PageRenderRequestParameters parameters,
PageRenderRequestHandler handler) throws IOException{
...
if ( !accessValidator.hasAccess(parameters.getLogicalPageName(),
null, null) ) ...
...
}
Is this the same way as explained in
http://wiki.apache.org/tapestry/Tapestry5HowToCreateADispatcher2? Or what's
difference between this srategy?
Thanks for help.
Howard Lewis Ship wrote:
>
> exists() looks for an instance in the HttpSession ... what is supposed
> to be creating this instance?
>
> On Tue, Mar 31, 2009 at 3:52 AM, Kasper <ka...@nekoconeko.nl> wrote:
>> Hi,
>>
>> I am trying to create a dispatcher to define the access levels for the
>> current user. I have followed the steps from the Wiki pages:
>> http://wiki.apache.org/tapestry/Tapestry5HowToCreateADispatcher
>> http://wiki.apache.org/tapestry/Tapestry5HowToCreateADispatcher2
>>
>> This seems to work. But as I try to do asm.exists(UserPermissions.class)
>> it
>> returns false. I checked the classpath for the class
>> my.project.services.UserPermissions. And there it does exist. I also
>> tried
>> to make it an interface but this didn't work out either.
>>
>> My classes:
>> ----------------------------------------------------------------------------------------------
>> AccessController.java:
>>
>> public class AccessController implements Dispatcher {
>>
>> private ApplicationStateManager asm;
>>
>> public AccessController(ApplicationStateManager asm) {
>> this.asm = asm;
>> }
>>
>> public boolean dispatch(Request request, Response response) throws
>> IOException {
>> boolean canAccess = true; // to avoid the access violation
>> for now
>>
>> if (asm.exists(UserPermissions.class)) {
>> UserPermissions perms =
>> asm.get(UserPermissions.class);
>>
>> canAccess = perms.canAccess(request);
>> }
>>
>> if (!canAccess) {
>> throw new RuntimeException("Access violation!");
>> }
>>
>> return false;
>> }
>> }
>>
>> ----------------------------------------------------------------------------------------------
>> UserPermissions.java:
>>
>> public class UserPermissions {
>>
>> public boolean canAccess(Request request) {
>> return true;
>> }
>>
>> }
>> ----------------------------------------------------------------------------------------------
>> AppModule.java:
>>
>> public class AppModule {
>>
>> public static void bind(ServiceBinder binder) {
>>
>> binder.bind(AccessController.class).withId("AccessController");
>> }
>>
>> public void
>> contributeMasterDispatcher(OrderedConfiguration<Dispatcher>
>> configuration,
>> @InjectService("AccessController") Dispatcher
>> accessController) {
>> configuration.add("AccessController", accessController,
>> "before:PageRender");
>> }
>> }
>> ----------------------------------------------------------------------------------------------
>>
>> Does anyone have a clue what I am doing wrong?
>>
>> Yours,
>> Kasper
>>
>> ----------------------------------------------------------------
>> This message was sent using IMP, the Internet Messaging Program.
>>
>>
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>>
>>
>
>
>
> --
> Howard M. Lewis Ship
>
> Creator Apache Tapestry and Apache HiveMind
>
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>
>
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Re: T5: AccessController Dispatcher asm.exists() not working?
Posted by Massimo Lusetti <ml...@gmail.com>.
On Thu, Sep 10, 2009 at 7:06 PM, neo anderson
<ja...@yahoo.co.uk> wrote:
> Is this the same way as explained in
> http://wiki.apache.org/tapestry/Tapestry5HowToCreateADispatcher2? Or what's
> difference between this srategy?
The chenillekit access module comes from the experience that made up
the wiki doc.
Cheers
--
Massimo
http://meridio.blogspot.com
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