4 files changed, 14 insertions, 7 deletions
diff --git a/actionpack/lib/action_controller/metal.rb b/actionpack/lib/action_controller/metal.rb
index d5f150e7c9..125dbf6bb5 100644
--- a/actionpack/lib/action_controller/metal.rb
+++ b/actionpack/lib/action_controller/metal.rb
@@ -196,15 +196,10 @@ module ActionController
       @_request = request
       @_env = request.env
       @_env['action_controller.instance'] = self
-      @_env['action_dispatch.show_detailed_exceptions'] = show_detailed_exceptions?
       process(name)
       to_a
     end
 
-    def show_detailed_exceptions?
-      defined?(Rails.application) && Rails.application.config.consider_all_requests_local || request.local?
-    end
-
     def to_a #:nodoc:
       response ? response.to_a : [status, headers, response_body]
     end
diff --git a/actionpack/lib/action_controller/metal/rescue.rb b/actionpack/lib/action_controller/metal/rescue.rb
index eb037aa1b0..736ff5b31c 100644
--- a/actionpack/lib/action_controller/metal/rescue.rb
+++ b/actionpack/lib/action_controller/metal/rescue.rb
@@ -3,6 +3,11 @@ module ActionController #:nodoc:
     extend ActiveSupport::Concern
     include ActiveSupport::Rescuable
 
+    included do
+      config_accessor :consider_all_requests_local
+      self.consider_all_requests_local = false if consider_all_requests_local.nil?
+    end
+
     def rescue_with_handler(exception)
       if (exception.respond_to?(:original_exception) &&
           (orig_exception = exception.original_exception) &&
@@ -12,10 +17,15 @@ module ActionController #:nodoc:
       super(exception)
     end
 
+    def show_detailed_exceptions?
+      consider_all_requests_local || request.local?
+    end
+
     private
       def process_action(*args)
         super
       rescue Exception => exception
+        request.env['action_dispatch.show_detailed_exceptions'] = show_detailed_exceptions?
         rescue_with_handler(exception) || raise(exception)
       end
   end
diff --git a/actionpack/lib/action_controller/railtie.rb b/actionpack/lib/action_controller/railtie.rb
index f0c29825ba..de7b837ecc 100644
--- a/actionpack/lib/action_controller/railtie.rb
+++ b/actionpack/lib/action_controller/railtie.rb
@@ -21,6 +21,8 @@ module ActionController
       paths   = app.config.paths
       options = app.config.action_controller
 
+      options.consider_all_requests_local ||= app.config.consider_all_requests_local
+
       options.assets_dir           ||= paths["public"].first
       options.javascripts_dir      ||= paths["public/javascripts"].first
       options.stylesheets_dir      ||= paths["public/stylesheets"].first
diff --git a/actionpack/test/controller/show_exceptions_test.rb b/actionpack/test/controller/show_exceptions_test.rb
index c328a42e89..39245e9574 100644
--- a/actionpack/test/controller/show_exceptions_test.rb
+++ b/actionpack/test/controller/show_exceptions_test.rb
@@ -1,7 +1,7 @@
 require 'abstract_unit'
 
 module ShowExceptions
-  class ShowExceptionsController < ActionController::Metal
+  class ShowExceptionsController < ActionController::Base
     use ActionDispatch::ShowExceptions
 
     def boom
@@ -27,7 +27,7 @@ module ShowExceptions
     end
 
     test 'show diagnostics from a remote ip when consider_all_requests_local is true' do
-      Rails.stubs(:application).returns stub(:config => stub(:consider_all_requests_local => true))
+      ShowExceptionsController.any_instance.stubs(:consider_all_requests_local).returns(true)
       @app = ShowExceptionsController.action(:boom)
       self.remote_addr = '208.77.188.166'
       get '/'