private function getLinkHeaderAsArray($linkHeaderAsString)
    {
        $urls = array();

        if (preg_match_all('/<(.*?)>\s*;\s*rel="(.*?)"\s*/', $linkHeaderAsString, $matches)) {
            foreach ($matches[2] as $i => $relName) {
                $urls[$relName] = $matches[1][$i];
            }
        }

        return $urls;
    }