protected function downloadMediaFileFromURL($fileUri, $tempFileName)
    {
        $curl = curl_init();
        curl_setopt($curl, CURLOPT_URL, "$fileUri");
        curl_setopt($curl, CURLOPT_USERAGENT,
            "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11");
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_HEADER, false);
        curl_setopt($curl, CURLOPT_NOBODY, false);
        curl_setopt($curl, CURLOPT_BUFFERSIZE, 1024);
        curl_setopt($curl, CURLOPT_FILE, $tempFileName);
        curl_exec($curl);
        curl_close($curl);
    }