# File lib/omniauth/strategy.rb, line 447
    def redirect(uri)
      r = Rack::Response.new

      if options[:iframe]
        r.write("<script type='text/javascript' charset='utf-8'>top.location.href = '#{uri}';</script>")
      else
        r.write("Redirecting to #{uri}...")
        r.redirect(uri)
      end

      r.finish
    end