def METHOD_NAME():
	rev = request.args.get("rev", "HEAD")
	cached = bucket.blob("menu-cache/%s" % rev)
	if cached.exists():
		return Response(cached.download_as_string(), headers={
			"Content-Type": "application/json",
		})
	else:
		return Response("Don't have that version cached", 404)
		# Redirect to old URL?
		pass