%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
/**
* The class maps settings and options from imageproxy.
*
* @package \Optml\Inc
* @author Optimole <friends@optimole.com>
*/
abstract class Optml_Resource {
use Optml_Validator;
use Optml_Normalizer;
/**
* Signature size.
*/
const SIGNATURE_SIZE = 8;
/**
* Source image url.
*
* @var string Source image.
*/
protected $source_url = '';
/**
* Cache Buster passed from Optimole Service.
*
* @var string Active Cache Buster
*/
protected $cache_buster = '';
/**
* Optml_Resource constructor.
*
* @param string $url Source image url.
* @param string $cache_buster The cache buster.
*
* @throws \InvalidArgumentException In case that the url is not provided.
*/
public function __construct( $url = '', $cache_buster = '' ) {
if ( empty( $url ) ) {
throw new \InvalidArgumentException( 'Optimole resource builder requires the source url to optimize.' ); // @codeCoverageIgnore
}
$this->set_defaults();
$this->source_url = apply_filters( 'optml_processed_url', $url );
$this->cache_buster = $cache_buster;
}
/**
* Set defaults for resource transformations.
*/
abstract protected function set_defaults();
/**
* Return transformed url.
*
* @param array $params Either will be signed or not.
*
* @return string Transformed image url.
*/
abstract public function get_url( $params = [] );
/**
* Method to generate tokens and cache them for further requests.
*
* @param string $source The source string to tokenize.
* @param int $size The size of bites for the generated token.
*
* @return string
*/
private function get_token_from_cache( $source, $size = 8 ) {
$key = crc32( $source );
$cache_token = wp_cache_get( $key, 'optml_cache_tokens' );
if ( $cache_token === false ) {
$cache_token = $this->get_signature( $source, $size );
wp_cache_add( $key, $cache_token, 'optml_cache_tokens', DAY_IN_SECONDS );
}
return $cache_token;
}
/**
* Get the token for the domain.
*
* @return string
*/
public function get_domain_token() {
$parts = parse_url( $this->source_url );
$domain = isset( $parts['host'] ) ? str_replace( 'www.', '', $parts['host'] ) : '';
return $this->get_token_from_cache( $domain, 5 );
}
/**
* Get token for the url.
*
* @return string
*/
private function get_url_token() {
$url = strtok( $this->source_url, '?' );
return $this->get_token_from_cache( $url, 6 );
}
/**
* Return a the cache buster, defaults to the url token used previously.
*
* @return string|bool
*/
public function get_cache_buster() {
if ( $this->cache_buster !== '' ) {
return $this->cache_buster;
}
return false;
}
/**
* Return the url signature.
*
* @param string $string The path from url.
*
* @return bool|string
*/
public function get_signature( $string = '', $size = self::SIGNATURE_SIZE ) {
$binary = hash_hmac( 'sha256', Optml_Config::$secret . $string, Optml_Config::$key, true );
$binary = pack( 'A' . $size, $binary );
$signature = rtrim( strtr( base64_encode( $binary ), '+/', '-_' ), '=' );
return $signature;
}
}
Zerion Mini Shell 1.0