Avoid deadlock when not closing: http://johnbintz.github.com/blog/2012/03/05/closing-given-body-in-rack-middleware/

Author: krukow

lib/m2r/rack_handler.rb

@@ -37,6 +37,7 @@ def process(request)
       status, headers, body = @app.call(env)
       buffer = ""
       body.each { |part| buffer << part }
+      body.close if body.respond_to?(:close)
       return Response.new(status, headers, buffer)
     end