# File lib/action_controller/response.rb, line 66
    def content_type=(mime_type)
      new_content_type =
        if mime_type =~ /charset/ || (c = charset).nil?
          mime_type.to_s
        else
          "#{mime_type}; charset=#{c}"
        end
      self.headers["Content-Type"] = URI.escape(new_content_type, "\r\n")
    end