RESTful way of getting a resource, but creating it if it doesn't exist yet

Question

For a RESTful API that I\'m creating, I need to have some functionality that get\'s a resource, but if it doesn\'t exist, creates it and then returns it. I don\'t think this

Answer 1

very simple:

1. Request: HEAD, examine response code: either 404 or 200. If you need the body, use GET.
2. It not available, perform a PUT or POST, the server should respond with 204 and the Location header with the URL of the newly created resource.