new

# File actionpack/lib/action_dispatch/http/response.rb, line 62
    def initialize(status = 200, header = {}, body = [])
      self.body, self.header, self.status = body, header, status

      @sending_file = false
      @blank = false

      if content_type = self["Content-Type"]
        type, charset = content_type.split(/;\s*charset=/)
        @content_type = Mime::Type.lookup(type)
        @charset = charset || "UTF-8"
      end

      prepare_cache_control!

      yield self if block_given?
    end