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Linux v11800 5.3.0-1023-aws #25~18.04.1-Ubuntu SMP Fri Jun 5 15:19:18 UTC 2020 aarch64
|
| Current File : /storage/v11800/pilot/public_html/wp-content/mu-plugins/nginx-helper/admin/class-predis-purger.php |
<?php
/**
* The admin-specific functionality of the plugin.
*
* @package nginx-helper
*/
/**
* Description of Predis_Purger
*
* @package nginx-helper
* @subpackage nginx-helper/admin
* @author rtCamp
*/
class Predis_Purger extends Purger {
/**
* Predis api object.
*
* @since 2.0.0
* @access public
* @var string $redis_object Predis api object.
*/
public $redis_object;
/**
* Initialize the class and set its properties.
*
* @since 2.0.0
*/
public function __construct() {
global $nginx_helper_admin;
if ( ! class_exists( 'Predis\Autoloader' ) ) {
require_once NGINX_HELPER_BASEPATH . 'admin/predis.php';
}
Predis\Autoloader::register();
// redis server parameter.
$this->redis_object = new Predis\Client(
array(
'host' => $nginx_helper_admin->options['redis_hostname'],
'port' => $nginx_helper_admin->options['redis_port'],
)
);
try {
$this->redis_object->connect();
} catch ( Exception $e ) {
$this->log( $e->getMessage(), 'ERROR' );
}
}
/**
* Purge all.
*/
public function purge_all() {
global $nginx_helper_admin;
$prefix = trim( $nginx_helper_admin->options['redis_prefix'] );
$this->log( '* * * * *' );
// If Purge Cache link click from network admin then purge all.
if ( is_network_admin() ) {
$this->delete_keys_by_wildcard( $prefix . '*' );
$this->log( '* Purged Everything! * ' );
} else { // Else purge only site specific cache.
$parse = wp_parse_url( get_home_url() );
$parse['path'] = empty( $parse['path'] ) ? '/' : $parse['path'];
$this->delete_keys_by_wildcard( $prefix . $parse['scheme'] . 'GET' . $parse['host'] . $parse['path'] . '*' );
$this->log( '* ' . get_home_url() . ' Purged! * ' );
}
$this->log( '* * * * *' );
/**
* Fire an action after the Redis cache has been purged.
*
* @since 2.1.0
*/
do_action( 'rt_nginx_helper_after_redis_purge_all' );
}
/**
* Purge url.
*
* @param string $url URL.
* @param bool $feed Feed or not.
*/
public function purge_url( $url, $feed = true ) {
global $nginx_helper_admin;
/**
* Filters the URL to be purged.
*
* @since 2.1.0
*
* @param string $url URL to be purged.
*/
$url2 = $url;
$url = apply_filters( 'rt_nginx_helper_purge_url', $url );
$this->log( '- Purging URL | ' . $url );
$parse = wp_parse_url( $url );
if ( ! isset( $parse['path'] ) ) {
$parse['path'] = '';
}
$prefix = $nginx_helper_admin->options['redis_prefix'];
$_url_purge_base = $prefix . $parse['scheme'] . 'GET' . $parse['host'] . $parse['path'];
/**
* To delete device type caches such as `<URL>--mobile`, `<URL>--desktop`, `<URL>--lowend`, etc.
* This would need $url above to be changed with this filter `rt_nginx_helper_purge_url` by cache key that Nginx sets while generating cache.
*
* For example: If page is accessed from desktop, then cache will be generated by appending `--desktop` to current URL.
* Add this filter in separate plugin or simply in theme's function.php file:
* ```
* add_filter( 'rt_nginx_helper_purge_url', function( $url ) {
* $url = $url . '--*';
* return $url;
* });
* ```
*
* Regardless of what key / suffix is being to store `$device_type` cache , it will be deleted.
*
* @since 2.1.0
*/
if ( strpos( $_url_purge_base, '*' ) === false ) {
$status = $this->delete_single_key( $_url_purge_base );
if ( $status ) {
$this->log( '- Purge URL | ' . $url2 . '--'. $_url_purge_base );
} else {
$this->log( '- Cache Not Found | '. $url2 . '--'. $_url_purge_base, 'ERROR' );
}
} else {
$status = $this->delete_keys_by_wildcard( $_url_purge_base );
if ( $status ) {
$this->log( '- Purge Wild Card URL | ' $url2.'--'. $_url_purge_base . ' | ' . $status . ' url purged' );
} else {
$this->log( '- Cache Not Found | ' $url2 . '--'. $_url_purge_base, 'ERROR' );
}
}
}
/**
* Custom purge urls.
*/
public function custom_purge_urls() {
global $nginx_helper_admin;
$parse = wp_parse_url( home_url() );
$prefix = $nginx_helper_admin->options['redis_prefix'];
$_url_purge_base = $prefix . $parse['scheme'] . 'GET' . $parse['host'];
$purge_urls = isset( $nginx_helper_admin->options['purge_url'] ) && ! empty( $nginx_helper_admin->options['purge_url'] ) ?
explode( "\r\n", $nginx_helper_admin->options['purge_url'] ) : array();
/**
* Allow plugins/themes to modify/extend urls.
*
* @param array $purge_urls URLs which needs to be purged.
* @param bool $wildcard If wildcard in url is allowed or not. default true.
*/
$purge_urls = apply_filters( 'rt_nginx_helper_purge_urls', $purge_urls, true );
if ( is_array( $purge_urls ) && ! empty( $purge_urls ) ) {
foreach ( $purge_urls as $purge_url ) {
$purge_url = trim( $purge_url );
if ( strpos( $purge_url, '*' ) === false ) {
$purge_url = $_url_purge_base . $purge_url;
$status = $this->delete_single_key( $purge_url );
if ( $status ) {
$this->log( '- Purge URL | ' . $purge_url );
} else {
$this->log( '- Not Found | ' . $purge_url, 'ERROR' );
}
} else {
$purge_url = $_url_purge_base . $purge_url;
$status = $this->delete_keys_by_wildcard( $purge_url );
if ( $status ) {
$this->log( '- Purge Wild Card URL | ' . $purge_url . ' | ' . $status . ' url purged' );
} else {
$this->log( '- Not Found | ' . $purge_url, 'ERROR' );
}
}
}
}
}
/**
* Single Key Delete Example
* e.g. $key can be nginx-cache:httpGETexample.com/
*
* @param string $key Key to delete cache.
*
* @return mixed
*/
public function delete_single_key( $key ) {
try {
return $this->redis_object->executeRaw( array( 'DEL', $key ) );
} catch ( Exception $e ) {
$this->log( $e->getMessage(), 'ERROR' );
}
}
/**
* Delete Keys by wildcard.
* e.g. $key can be nginx-cache:httpGETexample.com*
*
* Lua Script block to delete multiple keys using wildcard
* Script will return count i.e. number of keys deleted
* if return value is 0, that means no matches were found
*
* Call redis eval and return value from lua script
*
* @param string $pattern Pattern.
*
* @return mixed
*/
public function delete_keys_by_wildcard( $pattern ) {
// Lua Script.
$lua = <<<LUA
local k = 0
for i, name in ipairs(redis.call('KEYS', KEYS[1]))
do
redis.call('DEL', name)
k = k+1
end
return k
LUA;
try {
return $this->redis_object->eval( $lua, 1, $pattern );
} catch ( Exception $e ) {
$this->log( $e->getMessage(), 'ERROR' );
}
}
}