move file sending to the response object

Just a slight refactor that delegates file sending to the response
object.  This gives us the advantage that if a webserver (in the future)
provides a response object that knows how to do accelerated file
serving, it can implement this method.

1 files changed, 5 insertions, 1 deletions

diff --git a/actionpack/lib/action_controller/metal.rb b/actionpack/lib/action_controller/metal.rb
index beeaae9d0c..94ec62ec6f 100644
--- a/actionpack/lib/action_controller/metal.rb
+++ b/actionpack/lib/action_controller/metal.rb
@@ -174,7 +174,11 @@ module ActionController
 
     def response_body=(body)
       body = [body] unless body.nil? || body.respond_to?(:each)
-      response.body = body
+      response.reset_body!
+      body.each { |part|
+        next if part.empty?
+        response.write part
+      }
       super
     end