Yep, you're right, this doesn't seem to work. The issue is that security is
enforced at routing time (while the controller is still actually being
discovered). In order to do this sort of thing with the `check_permissions`,
we'd probably need to add a feature to pecan.
On 08/12/14 06:38 PM, Pendergrass, Eric wrote:
> Sure, here's the decorated method from v2.py:
>
> class MetersController(rest.RestController):
> """Works on meters."""
>
> @pecan.expose()
> def _lookup(self, meter_name, *remainder):
> return MeterController(meter_name), remainder
>
> @wsme_pecan.wsexpose([Meter], [Query])
> @secure(RBACController.check_permissions)
> def get_all(self, q=None):
>
> and here's the decorator called by the secure tag:
>
> class RBACController(object):
> global _ENFORCER
> if not _ENFORCER:
> _ENFORCER = policy.Enforcer()
>
>
> @classmethod
> def check_permissions(cls):
> # do some stuff
>
> In check_permissions I'd like to know the class and method with the @secure
> tag that caused check_permissions to be invoked. In this case, that would be
> MetersController.get_all.
>
> Thanks
>
>
> > Can you share some code? What do you mean by, "is there a way for the
> > decorator code to know it was called by MetersController.get_all"
> >
> > On 08/12/14 04:46 PM, Pendergrass, Eric wrote:
> > > Thanks Ryan, but for some reason the controller attribute is None:
> > >
> > > (Pdb) from pecan.core import state
> > > (Pdb) state.__dict__
> > > {'hooks': [<ceilometer.api.hooks.ConfigHook object at 0x31894d0>,
> > > <ceilometer.api.hooks.DBHook object at 0x3189650>,
> > > <ceilometer.api.hooks.PipelineHook object at 0x39871d0>,
> > > <ceilometer.api.hooks.TranslationHook object at 0x3aa5510>], 'app':
> > > <pecan.core.Pecan object at 0x2e76390>, 'request': <Request at
> > > 0x3ed7390 GET http://localhost:8777/v2/meters>, 'controller': None,
> > > 'response': <Response at 0x3ed74d0 200 OK>}
> > >
> > > > -----Original Message-----
> > > > From: Ryan Petrello [mailto:ryan.petre...@dreamhost.com]
> > > > Sent: Tuesday, August 12, 2014 10:34 AM
> > > > To: OpenStack Development Mailing List (not for usage questions)
> > > > Subject: Re: [openstack-dev] [Ceilometer] Way to get wrapped method's
> > > > name/class using Pecan secure decorators?
> > > >
> > > > This should give you what you need:
> > > >
> > > > from pecan.core import state
> > > > state.controller
> > > >
> > > > On 08/12/14 04:08 PM, Pendergrass, Eric wrote:
> > > > > Hi, I'm trying to use the built in secure decorator in Pecan for
> > > > > access control, and I'ld like to get the name of the method that is
> > > > > wrapped from within the decorator.
> > > > >
> > > > > For instance, if I'm wrapping MetersController.get_all with an
> > > > > @secure decorator, is there a way for the decorator code to know it
> > > > > was called by MetersController.get_all?
> > > > >
> > > > > I don't see any global objects that provide this information. I can
> > > > > get the endpoint, v2/meters, with pecan.request.path, but that's not
> > > > > as elegant.
> > > > >
> > > > > Is there a way to derive the caller or otherwise pass this
> > > > > information to the decorator?
> > > > >
> > > > > Thanks
> > > > > Eric Pendergrass
> > > >
> > > > > _______________________________________________
> > > > > OpenStack-dev mailing list
> > > > > OpenStack-dev@lists.openstack.org
> > > > > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
> > > >
> > > >
> > > > --
> > > > Ryan Petrello
> > > > Senior Developer, DreamHost
> > > > ryan.petre...@dreamhost.com
>
> _______________________________________________
> OpenStack-dev mailing list
> OpenStack-dev@lists.openstack.org
> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-dev
--
Ryan Petrello
Senior Developer, DreamHost
ryan.petre...@dreamhost.com
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