private URL _getSSLPictureURL(String objectId, PictureSize size) throws FacebookException {
        String url = buildEndpoint(objectId, "picture");
        HttpResponse res;
        HttpParameter[] params = new HttpParameter[]{new HttpParameter("return_ssl_resources", "1")};
        if (size != null) {
            params = HttpParameter.merge(params, new HttpParameter("type", size.toString()));
        }
        res = get(url, params);
        try {
            return new URL(res.getResponseHeader("Location"));
        } catch (MalformedURLException urle) {
            throw new FacebookException(urle.getMessage(), urle);
        }
    }