<?php

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/**

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* The htaccess rewrite rule operation class.

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*

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* Responsible for reading, writing, and generating .htaccess rules used by LiteSpeed Cache.

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*

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* @package LiteSpeed

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* @since 1.0.0

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*/

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namespace LiteSpeed;

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defined( 'WPINC' ) || exit();

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/**

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* Class Htaccess

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*

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* Provides utilities to locate, read, backup, and write .htaccess files for both frontend and backend,

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* as well as generate and manage LiteSpeed-specific rule blocks.

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*/

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class Htaccess extends Root {

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/**

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* Absolute path to the frontend `.htaccess`.

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*

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* @var string|null

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*/

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private $frontend_htaccess = null;

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/**

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* Default/auto-detected frontend `.htaccess` path before filters/overrides.

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*

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* @var string|null

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*/

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private $_default_frontend_htaccess = null;

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/**

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* Absolute path to the backend `.htaccess`.

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*

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* @var string|null

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*/

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private $backend_htaccess = null;

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/**

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* Default/auto-detected backend `.htaccess` path before filters/overrides.

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*

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* @var string|null

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*/

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private $_default_backend_htaccess = null;

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/**

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* Whether the frontend `.htaccess` (or its directory) is readable.

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*

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* @var bool

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*/

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private $frontend_htaccess_readable = false;

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/**

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* Whether the frontend `.htaccess` (or its directory) is writable.

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*

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* @var bool

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*/

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private $frontend_htaccess_writable = false;

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/**

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* Whether the backend `.htaccess` (or its directory) is readable.

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*

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* @var bool

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*/

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private $backend_htaccess_readable = false;

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/**

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* Whether the backend `.htaccess` (or its directory) is writable.

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*

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* @var bool

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*/

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private $backend_htaccess_writable = false;

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/**

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* Lines that turn on and guard rewrite/module blocks.

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*

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* @var array<int,string>

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*/

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private $__rewrite_on;

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/**

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* Lines that turn on and guard general rewrite/module blocks.

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*

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* @var array<int,string>

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*/

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private $__rewrite_general;

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const LS_MODULE_START = '<IfModule LiteSpeed>';

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const EXPIRES_MODULE_START = '<IfModule mod_expires.c>';

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const LS_MODULE_END = '</IfModule>';

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const LS_MODULE_REWRITE_START = '<IfModule mod_rewrite.c>';

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const REWRITE_ON = 'RewriteEngine on';

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const LS_MODULE_DONOTEDIT = '## LITESPEED WP CACHE PLUGIN - Do not edit the contents of this block! ##';

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const MARKER = 'LSCACHE';

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const MARKER_NONLS = 'NON_LSCACHE';

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const MARKER_LOGIN_COOKIE = '### marker LOGIN COOKIE';

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const MARKER_ASYNC = '### marker ASYNC';

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const MARKER_CRAWLER = '### marker CRAWLER';

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const MARKER_MOBILE = '### marker MOBILE';

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const MARKER_NOCACHE_COOKIES = '### marker NOCACHE COOKIES';

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const MARKER_NOCACHE_USER_AGENTS = '### marker NOCACHE USER AGENTS';

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const MARKER_CACHE_RESOURCE = '### marker CACHE RESOURCE';

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const MARKER_BROWSER_CACHE = '### marker BROWSER CACHE';

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const MARKER_MINIFY = '### marker MINIFY';

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const MARKER_CORS = '### marker CORS';

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const MARKER_WEBP = '### marker WEBP';

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const MARKER_DROPQS = '### marker DROPQS';

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const MARKER_START = ' start ###';

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const MARKER_END = ' end ###';

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/**

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* Initialize the class and set its properties.

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*

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* @since 1.0.7

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*/

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public function __construct() {

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$this->_path_set();

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$this->_default_frontend_htaccess = $this->frontend_htaccess;

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$this->_default_backend_htaccess = $this->backend_htaccess;

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$frontend_htaccess = defined( 'LITESPEED_CFG_HTACCESS' ) ? constant( 'LITESPEED_CFG_HTACCESS' ) : false;

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if ( $frontend_htaccess && substr( $frontend_htaccess, -10 ) === '/.htaccess' ) {

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$this->frontend_htaccess = $frontend_htaccess;

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}

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$backend_htaccess = defined( 'LITESPEED_CFG_HTACCESS_BACKEND' ) ? constant( 'LITESPEED_CFG_HTACCESS_BACKEND' ) : false;

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if ( $backend_htaccess && substr( $backend_htaccess, -10 ) === '/.htaccess' ) {

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$this->backend_htaccess = $backend_htaccess;

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}

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// Filter for frontend & backend htaccess path.

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$this->frontend_htaccess = apply_filters( 'litespeed_frontend_htaccess', $this->frontend_htaccess );

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$this->backend_htaccess = apply_filters( 'litespeed_backend_htaccess', $this->backend_htaccess );

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clearstatcache();

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// Frontend .htaccess privilege.

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$test_permissions = file_exists( $this->frontend_htaccess ) ? $this->frontend_htaccess : dirname( $this->frontend_htaccess );

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if ( is_readable( $test_permissions ) ) {

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$this->frontend_htaccess_readable = true;

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}

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if ( is_writable( $test_permissions ) ) { // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_is_writable -- Checking permissions, not file operations.

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$this->frontend_htaccess_writable = true;

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}

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// General Rewrite Rules (Files/Logs protection)

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$this->__rewrite_general = [

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self::LS_MODULE_REWRITE_START, // <IfModule mod_rewrite.c>

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self::REWRITE_ON, // RewriteEngine on

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'RewriteRule ' . preg_quote(LITESPEED_DATA_FOLDER) . '/debug/.*\.log$ - [F,L]', // phpcs:ignore WordPress.PHP.PregQuoteDelimiter.Missing

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'RewriteRule ' . preg_quote(self::CONF_FILE) . ' - [F,L]', // phpcs:ignore WordPress.PHP.PregQuoteDelimiter.Missing

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self::LS_MODULE_END, // </IfModule>

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];

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$this->__rewrite_on = [

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'CacheLookup on',

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'RewriteRule .* - [E=Cache-Control:no-autoflush]',

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];

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// Backend .htaccess privilege.

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if ( $this->frontend_htaccess === $this->backend_htaccess ) {

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$this->backend_htaccess_readable = $this->frontend_htaccess_readable;

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$this->backend_htaccess_writable = $this->frontend_htaccess_writable;

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} else {

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$test_permissions = file_exists( $this->backend_htaccess ) ? $this->backend_htaccess : dirname( $this->backend_htaccess );

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if ( is_readable( $test_permissions ) ) {

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$this->backend_htaccess_readable = true;

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}

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if ( is_writable( $test_permissions ) ) { // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_is_writable -- Checking permissions, not file operations.

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$this->backend_htaccess_writable = true;

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}

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}

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}

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/**

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* Get if htaccess file is readable.

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*

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* @since 1.1.0

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*

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* @param string $kind 'frontend' or 'backend'.

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* @return bool

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*/

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private function _readable( $kind = 'frontend' ) {

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if ( 'frontend' === $kind ) {

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return $this->frontend_htaccess_readable;

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}

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if ( 'backend' === $kind ) {

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return $this->backend_htaccess_readable;

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}

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return false;

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}

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/**

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* Get if htaccess file is writable.

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*

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* @since 1.1.0

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*

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* @param string $kind 'frontend' or 'backend'.

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* @return bool

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*/

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public function writable( $kind = 'frontend' ) {

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if ( 'frontend' === $kind ) {

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return $this->frontend_htaccess_writable;

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}

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if ( 'backend' === $kind ) {

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return $this->backend_htaccess_writable;

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}

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return false;

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}

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/**

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* Get frontend htaccess path.

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*

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* @since 1.1.0

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*

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* @param bool $show_default Whether to return the default/auto-detected path.

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* @return string

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*/

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public static function get_frontend_htaccess( $show_default = false ) {

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if ( $show_default ) {

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return self::cls()->_default_frontend_htaccess;

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}

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return self::cls()->frontend_htaccess;

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}

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/**

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* Get backend htaccess path.

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*

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* @since 1.1.0

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*

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* @param bool $show_default Whether to return the default/auto-detected path.

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* @return string

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*/

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public static function get_backend_htaccess( $show_default = false ) {

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if ( $show_default ) {

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return self::cls()->_default_backend_htaccess;

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}

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return self::cls()->backend_htaccess;

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}

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/**

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* Check to see if .htaccess exists starting at $start_path and going up directories until it hits DOCUMENT_ROOT.

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*

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* As dirname() strips the ending '/', paths passed in must exclude the final '/'.

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*

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* @since 1.0.11

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* @access private

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*

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* @param string $start_path Absolute path to begin searching from (without trailing slash).

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* @return string|false The directory containing .htaccess, or false if not found.

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*/

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private function _htaccess_search( $start_path ) {

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while ( ! file_exists( $start_path . '/.htaccess' ) ) {

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if ( '/' === $start_path || ! $start_path ) {

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return false;

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}

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$doc_root = ! empty( $_SERVER['DOCUMENT_ROOT'] ) ? sanitize_text_field( wp_unslash( $_SERVER['DOCUMENT_ROOT'] ) ) : '';

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if ( $doc_root && wp_normalize_path( $start_path ) === wp_normalize_path( $doc_root ) ) {

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return false;

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}

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if ( dirname( $start_path ) === $start_path ) {

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return false;

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}

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$start_path = dirname( $start_path );

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}

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return $start_path;

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}

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/**

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* Set the path class variables.

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*

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* @since 1.0.11

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* @access private

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* @return void

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*/

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private function _path_set() {

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$frontend = Router::frontend_path();

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$frontend_htaccess_search = $this->_htaccess_search( $frontend ); // The existing .htaccess path to be used for frontend .htaccess.

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$this->frontend_htaccess = $frontend;

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if ( $frontend_htaccess_search ) {

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$this->frontend_htaccess = $frontend_htaccess_search;

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}

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$this->frontend_htaccess .= '/.htaccess';

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$backend = realpath( ABSPATH ); // /home/user/public_html/backend/

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if ( $frontend === $backend ) {

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$this->backend_htaccess = $this->frontend_htaccess;

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return;

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}

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// Backend is a different path.

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$backend_htaccess_search = $this->_htaccess_search( $backend );

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// Found affected .htaccess.

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if ( $backend_htaccess_search ) {

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$this->backend_htaccess = $backend_htaccess_search . '/.htaccess';

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return;

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}

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// Frontend path is the parent of backend path.

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if ( 0 === stripos( (string) $backend, $frontend . '/' ) ) {

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// Backend uses frontend htaccess.

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$this->backend_htaccess = $this->frontend_htaccess;

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return;

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}

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$this->backend_htaccess = $backend . '/.htaccess';

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}

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/**

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* Get corresponding htaccess path.

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*

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* @since 1.1.0

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*

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* @param string $kind Frontend or backend.

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* @return string Path.

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*/

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public function htaccess_path( $kind = 'frontend' ) {

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switch ( $kind ) {

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case 'backend':

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$path = $this->backend_htaccess;

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break;

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case 'frontend':

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default:

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$path = $this->frontend_htaccess;

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break;

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}

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return $path;

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}

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/**

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* Get the content of the rules file.

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*

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* NOTE: will throw error if failed.

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*

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* @since 1.0.4

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* @since 2.9 Used exception for failed reading.

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* @access public

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*

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* @param string $kind 'frontend' or 'backend'.

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* @return string The file content.

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* @throws \Exception If the file is not readable or cannot be retrieved.

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*/

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public function htaccess_read( $kind = 'frontend' ) {

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$path = $this->htaccess_path( $kind );

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if ( ! $path || ! file_exists( $path ) ) {

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return "\n";

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}

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if ( ! $this->_readable( $kind ) ) {

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Error::t( 'HTA_R' );

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}

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$content = File::read( $path );

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if ( false === $content ) {

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Error::t( 'HTA_GET' );

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}

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// Remove ^M characters.

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$content = str_ireplace( "\x0D", '', $content );

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return $content;

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}

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/**

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* Try to backup the .htaccess file if we didn't save one before.

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*

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* NOTE: will throw error if failed.

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*

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* @since 1.0.10

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* @access private

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*

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* @param string $kind 'frontend' or 'backend'.

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* @return void

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* @throws \Exception If backup fails.

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*/

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private function _htaccess_backup( $kind = 'frontend' ) {

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$path = $this->htaccess_path( $kind );

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if ( ! file_exists( $path ) ) {

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return;

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}

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if ( file_exists( $path . '.bk' ) ) {

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return;

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}

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$res = copy( $path, $path . '.bk' );

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// Failed to backup, abort.

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if ( ! $res ) {

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Error::t( 'HTA_BK' );

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}

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}

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/**

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* Get mobile view rule from htaccess file.

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*

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* NOTE: will throw error if failed.

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*

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* @since 1.1.0

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*

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* @return string The user agent regex for mobile detection.

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* @throws \Exception If the rule cannot be found.

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*/

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public function current_mobile_agents() {

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$rules = $this->_get_rule_by( self::MARKER_MOBILE );

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if ( ! isset( $rules[0] ) ) {

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Error::t( 'HTA_DNF', self::MARKER_MOBILE );

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}

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$rule = trim( $rules[0] );

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$match = substr( $rule, strlen( 'RewriteCond %{HTTP_USER_AGENT} ' ), -strlen( ' [NC]' ) );

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if ( ! $match ) {

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Error::t( 'HTA_DNF', __( 'Mobile Agent Rules', 'litespeed-cache' ) );

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}

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return $match;

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}

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/**

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* Parse rewrites rule from the .htaccess file.

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*

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* NOTE: will throw error if failed.

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*

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* @since 1.1.0

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* @access public

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*

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* @param string $kind 'frontend' or 'backend'.

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* @return string The parsed login-cookie vary rule.

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* @throws \Exception If the rule cannot be found or is invalid.

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*/

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public function current_login_cookie( $kind = 'frontend' ) {

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$rule = $this->_get_rule_by( self::MARKER_LOGIN_COOKIE, $kind );

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if ( ! $rule ) {

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Error::t( 'HTA_DNF', self::MARKER_LOGIN_COOKIE );

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}

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if ( 0 !== strpos( $rule, 'RewriteRule .? - [E=' ) ) {

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Error::t( 'HTA_LOGIN_COOKIE_INVALID' );

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}

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$rule_cookie = substr( $rule, strlen( 'RewriteRule .? - [E=' ), -1 );

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if ( LITESPEED_SERVER_TYPE === 'LITESPEED_SERVER_OLS' ) {

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$rule_cookie = trim( $rule_cookie, '"' );

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}

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// Drop `Cache-Vary:`.

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$rule_cookie = substr( $rule_cookie, strlen( 'Cache-Vary:' ) );

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return $rule_cookie;

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}

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[464] Fix | Delete

/**

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* Get rewrite rules based on the marker.

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*

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* @since 2.0

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* @access private

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*

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* @param string $cond Marker constant (e.g. self::MARKER_MOBILE).

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* @param string $kind 'frontend' or 'backend'.

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* @return string|array<int,string>|false Rule(s) or false if not found.

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*/

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private function _get_rule_by( $cond, $kind = 'frontend' ) {

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clearstatcache();

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$path = $this->htaccess_path( $kind );

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if ( ! $this->_readable( $kind ) ) {

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return false;

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}

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$rules = File::extract_from_markers( $path, self::MARKER );

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if ( ! in_array( $cond . self::MARKER_START, $rules, true ) || ! in_array( $cond . self::MARKER_END, $rules, true ) ) {

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return false;

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}

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$key_start = array_search( $cond . self::MARKER_START, $rules, true );

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$key_end = array_search( $cond . self::MARKER_END, $rules, true );

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if ( false === $key_start || false === $key_end ) {

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return false;

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}

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$results = array_slice( $rules, $key_start + 1, $key_end - $key_start - 1 );

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if ( ! $results ) {

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return false;

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}

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if ( count( $results ) === 1 ) {

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return trim( $results[0] );

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