class Rack::Auth::AbstractHandler

def bad_request
  return [ 400,
    { 'Content-Type' => 'text/plain',
      'Content-Length' => '0' },
    []
  ]
end

def initialize(app, realm=nil, &authenticator)
  @app, @realm, @authenticator = app, realm, authenticator
end

def unauthorized(www_authenticate = challenge)
  return [ 401,
    { 'Content-Type' => 'text/plain',
      'Content-Length' => '0',
      'WWW-Authenticate' => www_authenticate.to_s },
    []
  ]
end