class ActionDispatch::Routing::Redirect

def serve(req) 

def serve(req)
  uri = URI.parse(path(req.path_parameters, req))
  unless uri.host
    if relative_path?(uri.path)
      uri.path = "#{req.script_name}/#{uri.path}"
    elsif uri.path.empty?
      uri.path = req.script_name.empty? ? "/" : req.script_name
    end
  end
  uri.scheme ||= req.scheme
  uri.host   ||= req.host
  uri.port   ||= req.port unless req.standard_port?
  req.commit_flash
  body = %(<html><body>You are being <a href="#{ERB::Util.unwrapped_html_escape(uri.to_s)}">redirected</a>.</body></html>)
  headers = {
    'Location' => uri.to_s,
    'Content-Type' => 'text/html',
    'Content-Length' => body.length.to_s
  }
  [ status, headers, [body] ]
end