protected function _get_permalink( $content ) {
		preg_match( '/<meta +?property=["\']og:url["\'][^\/>]*? content=["\']([^"\']+?)["\'].*?\/?>/si', $content, $reg );
		if ( ! empty( $reg[1] ) ) {
			return $reg[1];
		}

		return $this->url;
	}