Introduce `render :body` for render raw content

This is an option for sending a raw content back to browser. Note that
this rendering option will unset the default content type and does not
include "Content-Type" header back in the response.

You should only use this option if you are expecting the "Content-Type"
header to not be set. More information on "Content-Type" header can be
found on RFC 2616, section 7.2.1.

Please see #12374 for more detail.

1 files changed, 8 insertions, 0 deletions

diff --git a/actionpack/test/dispatch/response_test.rb b/actionpack/test/dispatch/response_test.rb
index 959a3bc5cd..26b77dfaf7 100644
--- a/actionpack/test/dispatch/response_test.rb
+++ b/actionpack/test/dispatch/response_test.rb
@@ -235,6 +235,14 @@ class ResponseTest < ActiveSupport::TestCase
       assert_equal @response.body, body.each.to_a.join
     end
   end
+
+  test "does not add default content-type if Content-Type is none" do
+    resp = ActionDispatch::Response.new.tap { |response|
+      response.content_type = 'none'
+    }
+
+    assert_not resp.headers.has_key?('Content-Type')
+  end
 end
 
 class ResponseIntegrationTest < ActionDispatch::IntegrationTest