import functools


def allow_cross_site_request(f):
    """Allow other sites to access this resource, see
    https://developer.mozilla.org/en/HTTP_access_control."""
    @functools.wraps(f)
    def wrapper(request, *args, **kw):
        response = f(request, *args, **kw)
        """If Access-Control-Allow-Credentials isn't set, the browser won't
        return data required cookies to see.  This is a good thing, let's keep
        it that way."""
        response['Access-Control-Allow-Origin'] = '*'
        response['Access-Control-Allow-Methods'] = 'GET'
        return response
    return wrapper