def get_csrf_token(request):
    """ Return a cross-site request forgery protection token.  It
        will be an ascii-compatible unicode string.  If a token was previously
        set for this user via ``new_csrf_token``, that token will be returned.
        If no CSRF token was previously set, ``new_csrf_token`` will be
        called, which will create and set a token, and this token will be
        returned.

        """
