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<?php
/**
* The localization class.
*
* @since 3.3
* @package LiteSpeed
*/
namespace LiteSpeed;
defined( 'WPINC' ) || exit();
/**
* Localization - serve external resources locally.
*
* @since 3.3
*/
class Localization extends Base {
const LOG_TAG = '🛍️';
/**
* Init optimizer
*
* @since 3.0
* @access protected
*/
public function init() {
add_filter( 'litespeed_buffer_finalize', [ $this, 'finalize' ], 23 ); // After page optm
}
/**
* Localize Resources
*
* @since 3.3
*
* @param string $uri Base64-encoded URL.
*/
public function serve_static( $uri ) {
$url = base64_decode( $uri ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_decode
if ( ! $this->conf( self::O_OPTM_LOCALIZE ) ) {
exit( 'Not supported' );
}
$match = false;
$domains = $this->conf( self::O_OPTM_LOCALIZE_DOMAINS );
foreach ( $domains as $v ) {
if ( ! $v || 0 === strpos( $v, '#' ) ) {
continue;
}
$type = 'js';
$domain = $v;
// Try to parse space split value
if ( strpos( $v, ' ' ) ) {
$v = explode( ' ', $v );
if ( ! empty( $v[1] ) ) {
$type = strtolower( $v[0] );
$domain = $v[1];
}
}
if ( 0 !== strpos( $domain, 'https://' ) ) {
continue;
}
if ( 'js' !== $type ) {
continue;
}
if ( $url !== $domain ) {
continue;
}
$match = true;
break;
}
if ( ! $match ) {
exit( 'Not supported2' );
}
header( 'Content-Type: application/javascript' );
// Generate
$this->_maybe_mk_cache_folder( 'localres' );
$file = $this->_realpath( $url );
self::debug( 'localize [url] ' . $url );
$response = wp_safe_remote_get( $url, [
'timeout' => 180,
'stream' => true,
'filename' => $file,
] );
// Parse response data
if ( is_wp_error( $response ) ) {
$error_message = $response->get_error_message();
if ( file_exists( $file ) ) {
wp_delete_file( $file );
}
self::debug( 'failed to get: ' . $error_message );
wp_safe_redirect( $url );
exit();
}
$url = $this->_rewrite( $url );
wp_safe_redirect( $url );
exit();
}
/**
* Get the final URL of local avatar
*
* @since 4.5
*
* @param string $url Original external URL.
* @return string Rewritten local URL.
*/
private function _rewrite( $url ) {
return LITESPEED_STATIC_URL . '/localres/' . $this->_filepath( $url );
}
/**
* Generate realpath of the cache file
*
* @since 4.5
* @access private
*
* @param string $url Original external URL.
* @return string Absolute file path.
*/
private function _realpath( $url ) {
return LITESPEED_STATIC_DIR . '/localres/' . $this->_filepath( $url );
}
/**
* Get filepath
*
* @since 4.5
*
* @param string $url Original external URL.
* @return string Relative file path.
*/
private function _filepath( $url ) {
$filename = md5( $url ) . '.js';
if ( is_multisite() ) {
$filename = get_current_blog_id() . '/' . $filename;
}
return $filename;
}
/**
* Localize JS/Fonts
*
* @since 3.3
* @access public
*
* @param string $content Page HTML content.
* @return string Modified content with localized URLs.
*/
public function finalize( $content ) {
if ( is_admin() ) {
return $content;
}
if ( ! $this->conf( self::O_OPTM_LOCALIZE ) ) {
return $content;
}
$domains = $this->conf( self::O_OPTM_LOCALIZE_DOMAINS );
if ( ! $domains ) {
return $content;
}
foreach ( $domains as $v ) {
if ( ! $v || 0 === strpos( $v, '#' ) ) {
continue;
}
$type = 'js';
$domain = $v;
// Try to parse space split value
if ( strpos( $v, ' ' ) ) {
$v = explode( ' ', $v );
if ( ! empty( $v[1] ) ) {
$type = strtolower( $v[0] );
$domain = $v[1];
}
}
if ( 0 !== strpos( $domain, 'https://' ) ) {
continue;
}
if ( 'js' !== $type ) {
continue;
}
$content = str_replace( $domain, LITESPEED_STATIC_URL . '/localres/' . base64_encode( $domain ), $content ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
}
return $content;
}
}