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<?php
namespace WP_Defender\Component;
use Calotes\Base\Component;
use WP_Defender\Model\Setting\Security_Headers;
abstract class Security_Header extends Component {
/**
* @var string
*/
static $rule_slug;
/**
* Use for cache.
*
* @var Security_Headers
*/
public $model;
/**
* @return array
*/
public function get_misc_data() {
return array();
}
/**
* @return mixed
*/
abstract function check();
/**
* @return string
*/
abstract function get_title();
/**
* @return mixed
*/
abstract function add_hooks();
/**
* Safe way to get cached model.
*
* @return Security_Headers
*/
protected function get_model() {
if ( is_object( $this->model ) ) {
return $this->model;
}
return $this->model = new Security_Headers();
}
/**
* Check if the header is out or not.
*
* @param $header
* @param $somewhere
*
* @return bool
*/
protected function maybe_submit_header( $header, $somewhere ) {
if ( false === $somewhere ) {
return true;
}
$list = headers_list();
$match = false;
foreach ( $list as $item ) {
if ( stristr( $item, $header ) ) {
$match = true;
}
}
return $match;
}
/**
* @param $url
* @param $origin
* @param $ttl
*
* @return array|mixed
*/
protected function head_request( $url, $origin, $ttl = null ) {
$model = $this->get_model();
$cached = $model->get_data_values( 'head_requests' );
if ( ! is_array( $cached ) ) {
$cached = array();
}
if ( isset( $cached[ $url ] ) ) {
$cache = $cached[ $url ];
if ( $cache['ttl'] > time() ) {
return $cache['data'];
}
}
// No cache or cache expired.
$request = wp_remote_head(
$url,
array(
'user-agent' => 'WP Defender self ping - ' . $origin,
)
);
if ( ! is_wp_error( $request ) ) {
$headers = wp_remote_retrieve_headers( $request );
$headers = $headers->getAll();
if ( null === $ttl ) {
$ttl = strtotime( '+1 day' );
}
$headers['response_code'] = wp_remote_retrieve_response_code( $request );
$cached[ $url ] = array(
'ttl' => apply_filters( 'wd_head_request_ttl', $ttl ),
'data' => $headers,
);
$model->set_data_values( 'head_requests', $cached );
$this->log( sprintf( 'Fetched header for %s into cache', $url ) );
return $headers;
}
return $request;
}
}