use angular 1.2+ intereptor pattern

h/js/flash.coffee

@@ -39,12 +39,8 @@ class FlashProvider
   ]
 
 
-angular.module('h.flash', ['ngResource'])
-.provider('flash', FlashProvider)
-.config(['$httpProvider', ($httpProvider) ->
-  $httpProvider.responseInterceptors.push ['$q', 'flash', ($q, flash) ->
-    (promise) ->
-      promise.then (response) ->
+flashInterceptor = ['$q', 'flash', ($q, flash) ->
+  response: (response) ->
     data = response.data
     format = response.headers 'content-type'
     if format?.match /^application\/json/
@@ -59,5 +55,12 @@ angular.module('h.flash', ['ngResource'])
         response
     else
       response
-  ]
+]
+
+
+angular.module('h.flash', ['ngResource'])
+.provider('flash', FlashProvider)
+.factory('flashInterceptor', flashInterceptor)
+.config(['$httpProvider', ($httpProvider) ->
+  $httpProvider.interceptors.push 'flashInterceptor'
 ])
\ No newline at end of file