Hi Michael. 

I want to make authorization in Yesod application build on ACL principle. 

We have in Yesod "Routes". "Route" is resource.  I have the list :

Resource |  Access 
----------------------------------
RouteA      |   Allow
RouteB      |   Deny

I would like to : 

1.  save, read this list  outward yesod
2.  check, that the concrete  route satisfy or not satisfy the list  
3.  have more flexible way to define resource pattern in list. For example i have RouteX String Int. I wish to define pattern   "RouteX * 666"

If i had this, i would to implement Yesod.isAuthorized  method similar

isAuthorized _ = do
    acl     <- getACL
    route <- getCurrentRoute
    case check acl route of
        True ->  return Authorized
        False -> return Unauthorized


I do not know, may be there is the way to make this now. 
How i can put it into practice ?

Thanks.


--
Best regards,
Cheshkov Anton
Phone: +7 909 005 18 82
Skype: cheshkov_anton