module ActionController::HttpAuthentication::Digest::ControllerMethods

def authenticate_or_request_with_http_digest(realm = "Application", message = nil, &password_procedure)

See ActionController::HttpAuthentication::Digest for example usage.

requesting the client to send a \Digest.
Authenticate using an HTTP \Digest, or otherwise render an HTTP header 
def authenticate_or_request_with_http_digest(realm = "Application", message = nil, &password_procedure)
  authenticate_with_http_digest(realm, &password_procedure) || request_http_digest_authentication(realm, message)
end