Add a layer of indirection making sanitizers pluggable.

actionview/lib/action_view/helpers/sanitize_helper.rb

@@ -137,6 +137,11 @@ module ClassMethods #:nodoc:
           define_method("#{meth_name}=") { |value| imp.("#{meth_name}=") }
         end
 
+        # A class to vendor out the full, link and white list sanitizers
+        # Can be set to either HTML::Scanner or HTML::Sanitizer
+        mattr_accessor :sanitizer_vendor
+        self.sanitizer_vendor = HTML::Scanner
+
         def sanitized_allowed_tags
           HTML::WhiteListSanitizer.allowed_tags
         end
@@ -153,7 +158,7 @@ def sanitized_allowed_attributes
         #   end
         #
         def full_sanitizer
-          @full_sanitizer ||= Rails::Html::FullSanitizer.new
+          @full_sanitizer ||= sanitizer_vendor.full_sanitizer.new
         end
 
         # Gets the Rails::Html::LinkSanitizer instance used by +strip_links+.
@@ -164,7 +169,7 @@ def full_sanitizer
         #   end
         #
         def link_sanitizer
-          @link_sanitizer ||= Rails::Html::LinkSanitizer.new
+          @link_sanitizer ||= sanitizer_vendor.link_sanitizer.new
         end
 
         # Gets the Rails::Html::WhiteListSanitizer instance used by sanitize and +sanitize_css+.
@@ -175,7 +180,7 @@ def link_sanitizer
         #   end
         #
         def white_list_sanitizer
-          @white_list_sanitizer ||= Rails::Html::WhiteListSanitizer.new
+          @white_list_sanitizer ||= sanitizer_vendor.white_list_sanitizer.new
         end
 
         # Replaces the allowed tags for the +sanitize+ helper.

actionview/lib/action_view/vendor/html-scanner.rb

@@ -7,6 +7,7 @@ module HTML
   extend ActiveSupport::Autoload
 
   eager_autoload do
+    autoload :Scanner, 'html/sanitizer'
     autoload :CDATA, 'html/node'
     autoload :Document, 'html/document'
     autoload :FullSanitizer, 'html/sanitizer'

actionview/lib/action_view/vendor/html-scanner/html/sanitizer.rb

@@ -3,6 +3,20 @@
 require 'active_support/core_ext/module/attribute_accessors'
 
 module HTML
+  module Scanner
+    def full_sanitizer
+      HTML::FullSanitizer
+    end
+
+    def link_sanitizer
+      HTML::LinkSanitizer
+    end
+
+    def white_list_sanitizer
+      HTML::WhiteListSanitizer
+    end
+  end
+
   class Sanitizer
     def sanitize(text, options = {})
       validate_options(options)