Added :before option to authentication

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@352 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/CHANGELOG

@@ -2,6 +2,8 @@
 
 * Added authentication framework to protect actions behind a condition and redirect on failure. See ActionController::Authentication for more.
 
+* Added Base#render_nothing as a cleaner way of doing render_text "" when you're not interested in returning anything but an empty response.
+
 * Added the possibility of passing nil to UrlHelper#link_to to use the link itself as the name
 
 

actionpack/lib/action_controller/authentication.rb

@@ -34,9 +34,11 @@ module ActionController #:nodoc:
       #
       # Options are:
       # * <tt>:by</tt> - the code fragment that will be evaluated on each request to determine whether the request is authenticated.
+      # * <tt>:before</tt> - a code fragment that's run before the failure redirect happens, such as 
+      #   '@session[:return_to] = @request.request_uri'.
       # * <tt>:failure</tt> - redirection options following the format of Base#url_for.
       def authentication(options)
-        options.assert_valid_keys([:by, :failure])
+        options.assert_valid_keys([:by, :failure, :before])
         class_eval <<-EOV
           protected          
             def actions_excepted_from_authentication
@@ -71,6 +73,7 @@ module ActionController #:nodoc:
               if !action_needs_authentication? || #{options[:by]}
                 return true
               else
+                #{options[:before]}
                 redirect_to(#{options[:failure].inspect})
                 return false
               end

actionpack/test/controller/authentication_test.rb

@@ -2,7 +2,7 @@ require File.dirname(__FILE__) + '/../abstract_unit'
 
 class AuthenticationTest < Test::Unit::TestCase
   class ApplicationController < ActionController::Base
-    authentication :by => '@session[:authenticated]', :failure => { :controller => "login" }
+    authentication :by => '@session[:authenticated]', :before => '@session[:return_to] = "/weblog/"', :failure => { :controller => "login" }
   end
 
   class WeblogController < ApplicationController
@@ -10,7 +10,10 @@ class AuthenticationTest < Test::Unit::TestCase
     def index()  render_text "I indexed something" end
     def edit()   render_text "I edited something"  end
     def update() render_text "I updated something" end
-    def login()  @session[:authenticated] = true; render_nothing end
+    def login
+      @session[:authenticated] = true
+      @session[:return_to] ? redirect_to_path(@session[:return_to]) : render_nothing
+    end
   end
 
   class AuthenticatesWeblogController < WeblogController
@@ -86,4 +89,14 @@ class AuthenticationTest < Test::Unit::TestCase
     get :edit
     assert_success
   end
+  
+  def test_before_condition
+    @controller = AuthenticatesWeblogController.new
+
+    get :edit
+    assert_redirected_to :controller => "login"
+    
+    get :login
+    assert_redirect_url "http://test.host/weblog/"
+  end
 end