custom domain cookie support

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

lib/devise.rb

@@ -47,6 +47,10 @@ module Devise
     :bcrypt => 60
   }
 
+  # Custom domain for cookies. Not set by default
+  mattr_accessor :cookie_domain
+  @@cookie_domain = false
+
   # Used to encrypt password. Please generate one with rake secret.
   mattr_accessor :pepper
   @@pepper = nil

lib/devise/hooks/forgetable.rb

@@ -2,9 +2,10 @@
 # to forget_me! Also clear remember token to ensure the user won't be
 # remembered again. Notice that we forget the user unless the record is frozen.
 # This avoids forgetting deleted users.
-Warden::Manager.before_logout do |record, warden, scope|
+Warden::Manager.before_logout do |record, warden, options|
   if record.respond_to?(:forget_me!)
     record.forget_me! unless record.frozen?
-    warden.cookies.delete "remember_#{scope}_token"
+
+    warden.cookies.delete("remember_#{options[:scope].to_s}_token", :domain => record.cookie_domain, :path => "/")
   end
 end

lib/devise/hooks/rememberable.rb

@@ -11,11 +11,17 @@ module Devise
         if succeeded? && resource.respond_to?(:remember_me!) && remember_me?
           resource.remember_me!
 
-          cookies.signed["remember_#{scope}_token"] = {
+          conf = {
             :value => resource.class.serialize_into_cookie(resource),
             :expires => resource.remember_expires_at,
             :path => "/"
           }
+
+          conf[:domain] = resource.cookie_domain if resource.cookie_domain?  
+
+          Warden::Manager.after_set_user do |record, warden, options|
+            warden.cookies["remember_#{options[:scope]}_token"] = conf
+          end
         end
       end
 
@@ -29,3 +35,4 @@ module Devise
 end
 
 Devise::Strategies::Authenticatable.send :include, Devise::Hooks::Rememberable
+

lib/devise/models/rememberable.rb

@@ -65,6 +65,14 @@ module Devise
         remember_created_at + self.class.remember_for
       end
 
+      def cookie_domain
+        self.class.cookie_domain
+      end
+
+      def cookie_domain?
+        self.class.cookie_domain != false
+      end
+
       module ClassMethods
         # Create the cookie key using the record id and remember_token
         def serialize_into_cookie(record)
@@ -79,6 +87,7 @@ module Devise
         end
 
         Devise::Models.config(self, :remember_for)
+        Devise::Models.config(self, :cookie_domain)
       end
     end
   end