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Add salt to cached HTML file hashes

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This commit is contained in:
Tetrakern 2024-05-19 15:44:20 +02:00
parent bebcff3a5f
commit e8c973ee59
1 changed files with 36 additions and 1 deletions
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37
includes/functions/_service-caching.php
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@ -765,6 +765,38 @@ add_action( 'wp_update_nav_menu', 'fictioneer_purge_nav_menu_transients' );
// PARTIAL CACHING (THEME)
// =============================================================================
/**
* Generate random salt for cache-related hashes
*
* Note: Saves the salt to the option 'fictioneer_cache_salt'.
*
* @since 5.18.3
*
* @return string The generated salt.
*/
function fictioneer_generate_cache_salt() {
$salt = bin2hex( random_bytes( 32 / 2 ) );
update_option( 'fictioneer_cache_salt', $salt );
return $salt;
}
/**
* Get salt for cache-related hashes
*
* Note: Regenerated if no salt exists.
*
* @since 5.18.3
*
* @return string The salt.
*/
function fictioneer_get_cache_salt() {
return get_option( 'fictioneer_cache_salt' ) ?: fictioneer_generate_cache_salt();
}
/**
* Get static HTML of cached template partial
*
@ -815,7 +847,7 @@ function fictioneer_get_cached_partial( $slug, $identifier = '', $expiration = n
}
// Setup
$args_hash = md5( serialize( $args ) . $identifier );
$args_hash = md5( serialize( $args ) . $identifier . fictioneer_get_cache_salt() );
$static_file = $slug . ( $name ? "-{$name}" : '' ) . "-{$args_hash}.html";
$path = get_template_directory() . '/cache/html/' . $static_file;
@ -869,6 +901,9 @@ function fictioneer_clear_all_cached_partials() {
// Setup
$cache_dir = get_template_directory() . '/cache/html/';
// Regenerate cache salt
fictioneer_generate_cache_salt();
// Ensure the directory exists
if ( ! file_exists( $cache_dir ) ) {
return;