Support list of possible domains for cookies

Signed-off-by: José Valim <jose.valim@gmail.com>

actionpack/lib/action_dispatch/middleware/cookies.rb

@@ -136,6 +136,9 @@ def handle_options(options) #:nodoc:
           options[:domain] = if (@host !~ /^[\d.]+$/) && (@host =~ DOMAIN_REGEXP)
             ".#{$1}.#{$2}"
           end
+        elsif options[:domain].is_a? Array
+          # if host matches one of the supplied domains without a dot in front of it
+          options[:domain] = options[:domain].find {|domain| @host.include? domain[/^\.?(.*)$/, 1] }
         end
       end
 

actionpack/test/dispatch/cookies_test.rb

@@ -95,6 +95,16 @@ def delete_cookie_with_domain
       head :ok
     end
 
+    def set_cookie_with_domains
+      cookies[:user_name] = {:value => "rizwanreza", :domain => %w(example1.com example2.com .example3.com)}
+      head :ok
+    end
+
+    def delete_cookie_with_domains
+      cookies.delete(:user_name, :domain => %w(example1.com example2.com .example3.com))
+      head :ok
+    end
+
     def symbol_key
       cookies[:user_name] = "david"
       head :ok
@@ -322,6 +332,41 @@ def test_deleting_cookie_with_all_domain_option
     assert_cookie_header "user_name=; domain=.nextangle.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT"
   end
 
+  def test_cookie_with_several_preset_domains_using_one_of_these_domains
+    @request.host = "example1.com"
+    get :set_cookie_with_domains
+    assert_response :success
+    assert_cookie_header "user_name=rizwanreza; domain=example1.com; path=/"
+  end
+
+  def test_cookie_with_several_preset_domains_using_other_domain
+    @request.host = "other-domain.com"
+    get :set_cookie_with_domains
+    assert_response :success
+    assert_cookie_header "user_name=rizwanreza; path=/"
+  end
+
+  def test_cookie_with_several_preset_domains_using_shared_domain
+    @request.host = "example3.com"
+    get :set_cookie_with_domains
+    assert_response :success
+    assert_cookie_header "user_name=rizwanreza; domain=.example3.com; path=/"
+  end
+
+  def test_deletings_cookie_with_several_preset_domains_using_one_of_these_domains
+    @request.host = "example2.com"
+    get :delete_cookie_with_domains
+    assert_response :success
+    assert_cookie_header "user_name=; domain=example2.com; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT"
+  end
+
+  def test_deletings_cookie_with_several_preset_domains_using_other_domain
+    @request.host = "other-domain.com"
+    get :delete_cookie_with_domains
+    assert_response :success
+    assert_cookie_header "user_name=; path=/; expires=Thu, 01-Jan-1970 00:00:00 GMT"
+  end
+
   def test_cookies_hash_is_indifferent_access
     [:symbol_key, :string_key].each do |cookie_key|
       get cookie_key