public function download($url)
	{
		$getResult = $this->session->get($url);

		if (!$getResult->success) {
			$this->error = array();
			$this->error['file'] = 'Download error (HTTP status: ' . $getResult->status_code . ')';
			$this->error['http'] = $getResult->status_code;
			return null;
		}
		return $getResult->body;
	}