Make current_page? compare binary strings

actionview/lib/action_view/helpers/url_helper.rb

@@ -528,17 +528,18 @@ module ActionView
 
         return false unless request.get? || request.head?
 
-        url_string = url_for(options)
+        url_string = URI.unescape(url_for(options)).force_encoding(Encoding::BINARY)
 
         # We ignore any extra parameters in the request_uri if the
         # submitted url doesn't have any either. This lets the function
         # work with things like ?order=asc
         request_uri = url_string.index("?") ? request.fullpath : request.path
+        request_uri = URI.unescape(request_uri).force_encoding(Encoding::BINARY)
 
         if url_string =~ /^\w+:\/\//
-          URI.unescape(url_string) == URI.unescape("#{request.protocol}#{request.host_with_port}#{request_uri}")
+          url_string == "#{request.protocol}#{request.host_with_port}#{request_uri}"
         else
-          URI.unescape(url_string) == URI.unescape(request_uri)
+          url_string == request_uri
         end
       end
 

actionview/test/template/url_helper_test.rb

@@ -408,6 +408,14 @@ class UrlHelperTest < ActiveSupport::TestCase
     assert current_page?(controller: 'foo', action: 'category', category: 'administração')
   end
 
+  def test_current_page_with_escaped_params_with_different_encoding
+    @request = request_for_url("/")
+    @request.stub(:path, "/category/administra%c3%a7%c3%a3o".force_encoding(Encoding::ASCII_8BIT)) do
+      assert current_page?(:controller => 'foo', :action => 'category', category: 'administração')
+      assert current_page?("http://www.example.com/category/administra%c3%a7%c3%a3o")
+    end
+  end
+
   def test_current_page_with_double_escaped_params
     @request = request_for_url("/category/administra%c3%a7%c3%a3o?callback_url=http%3a%2f%2fexample.com%2ffoo")