ruby on rails - Doorkeeper authorize also redirect_uri subpath -

i developing oauth 2.0 server using doorkeeper.

what need 'customize' implicit flow authorization in order let sub-path of client redirect_uri authorized well.

example

client ( id: "123", name: "example", redirect_uri: "http://www.foo.com")  request : client_id : "123", scope:"-" redirect_uri:"http://www.foo.com"   => token  request : client_id : "123", scope:"-" redirect_uri:"http://www.foo.com/bar/whatever"   => invalid redirect_uri (i want token) 

any suggestion?