globally refactor Range handling for responses

Rack::Utils::HeaderHash is still very expensive in Rack 1.2,
especially for simple things that we want to run as fast as
possible with minimal interference.  HeaderHash is unnecessary
for most requests that do not send Content-Range in responses.

1 files changed, 3 insertions, 2 deletions

diff --git a/lib/rainbows/ev_core.rb b/lib/rainbows/ev_core.rb
index 60fbdca..471f6a3 100644
--- a/lib/rainbows/ev_core.rb
+++ b/lib/rainbows/ev_core.rb
@@ -36,14 +36,15 @@ module Rainbows::EvCore
   end
 
   # returns whether to enable response chunking for autochunk models
-  def stream_response_headers(status, headers)
+  def stream_response_headers(status, headers, alive)
+    headers = Rack::Utils::HeaderHash.new(headers)
     if headers['Content-Length']
       rv = false
     else
       rv = !!(headers['Transfer-Encoding'] =~ %r{\Achunked\z}i)
       rv = false if headers.delete('X-Rainbows-Autochunk') == 'no'
     end
-    write(response_header(status, headers))
+    write_headers(status, headers, alive)
     rv
   end