1 files changed, 14 insertions, 3 deletions
diff --git a/actionpack/lib/abstract_controller/rendering.rb b/actionpack/lib/abstract_controller/rendering.rb
index 887196b3d2..2bb7c2139e 100644
--- a/actionpack/lib/abstract_controller/rendering.rb
+++ b/actionpack/lib/abstract_controller/rendering.rb
@@ -23,7 +23,11 @@ module AbstractController
     def render(*args, &block)
       options = _normalize_render(*args, &block)
       self.response_body = render_to_body(options)
-      _process_format(rendered_format, options) if rendered_format
+      if options[:plain]
+        _set_content_type Mime::TEXT.to_s
+      else
+        _set_content_type _get_content_type(rendered_format)
+      end
       self.response_body
     end
 
@@ -99,7 +103,14 @@ module AbstractController
 
     # Process the rendered format.
     # :api: private
-    def _process_format(format, options = {})
+    def _process_format(format)
+    end
+
+    def _get_content_type(rendered_format) # :nodoc:
+      rendered_format.to_s
+    end
+
+    def _set_content_type(type) # :nodoc:
     end
 
     # Normalize args and options.
@@ -107,7 +118,7 @@ module AbstractController
     def _normalize_render(*args, &block)
       options = _normalize_args(*args, &block)
       #TODO: remove defined? when we restore AP <=> AV dependency
-      if defined?(request) && request && request.variant.present?
+      if defined?(request) && request.variant.present?
         options[:variant] = request.variant
       end
       _normalize_options(options)