mock.rb

      res = nil
      tf = nil
      http.request(req) do |response|
        if raw
          tf = Tempfile.new("chef-rest") 
          # Stolen from http://www.ruby-forum.com/topic/166423
          # Kudos to _why!
          size, total = 0, response.header['Content-Length'].to_i
          response.read_body do |chunk|
            tf.write(chunk) 
            size += chunk.size
            Chef::Log.debug("#{req.path} %d%% done (%d of %d)" % [(size * 100) / total, size, total])
          end
          tf.close 
          tf
        else
          response.read_body
        end
        res = response
      end