class ActionDispatch::Routing::Redirect

def call(env) 

def call(env)
  req = Request.new(env)
  # If any of the path parameters has a invalid encoding then
  # raise since it's likely to trigger errors further on.
  req.symbolized_path_parameters.each do |key, value|
    unless value.valid_encoding?
      raise ActionController::BadRequest, "Invalid parameter: #{key} => #{value}"
    end
  end
  uri = URI.parse(path(req.symbolized_path_parameters, req))
  uri.scheme ||= req.scheme
  uri.host   ||= req.host
  uri.port   ||= req.port unless req.standard_port?
  if relative_path?(uri.path)
    uri.path = "#{req.script_name}/#{uri.path}"
  end
  body = %(<html><body>You are being <a href="#{ERB::Util.h(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