381 lines
14 KiB
PHP
381 lines
14 KiB
PHP
<?php
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/**
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* Critical CSS settings AJAX logic.
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*/
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if ( ! defined( 'ABSPATH' ) ) {
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exit;
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}
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class autoptimizeCriticalCSSSettingsAjax {
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public function __construct()
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{
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// fetch all options at once and populate them individually explicitely as globals.
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$all_options = autoptimizeCriticalCSSBase::fetch_options();
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foreach ( $all_options as $_option => $_value ) {
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global ${$_option};
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${$_option} = $_value;
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}
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$this->run();
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}
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public function run() {
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// add filters.
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add_action( 'wp_ajax_fetch_critcss', array( $this, 'critcss_fetch_callback' ) );
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add_action( 'wp_ajax_save_critcss', array( $this, 'critcss_save_callback' ) );
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add_action( 'wp_ajax_rm_critcss', array( $this, 'critcss_rm_callback' ) );
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add_action( 'wp_ajax_rm_critcss_all', array( $this, 'critcss_rm_all_callback' ) );
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add_action( 'wp_ajax_ao_ccss_export', array( $this, 'ao_ccss_export_callback' ) );
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add_action( 'wp_ajax_ao_ccss_import', array( $this, 'ao_ccss_import_callback' ) );
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}
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public function critcss_fetch_callback() {
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// Ajax handler to obtain a critical CSS file from the filesystem.
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// Check referer.
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check_ajax_referer( 'fetch_critcss_nonce', 'critcss_fetch_nonce' );
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// Initialize error flag.
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$error = true;
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// Allow no content for MANUAL rules (as they may not exist just yet).
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if ( current_user_can( 'manage_options' ) && empty( $_POST['critcssfile'] ) ) {
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$content = '';
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$error = false;
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} elseif ( current_user_can( 'manage_options' ) && $this->critcss_check_filename( $_POST['critcssfile'] ) ) {
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// Or check user permissios and filename.
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// Set file path and obtain its content.
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$critcssfile = AO_CCSS_DIR . strip_tags( $_POST['critcssfile'] );
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if ( file_exists( $critcssfile ) ) {
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$content = file_get_contents( $critcssfile );
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$error = false;
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}
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}
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// Prepare response.
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if ( $error ) {
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$response['code'] = '500';
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$response['string'] = 'Error reading file ' . $critcssfile . '.';
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} else {
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$response['code'] = '200';
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$response['string'] = $content;
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}
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// Dispatch respose.
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echo json_encode( $response );
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// Close ajax request.
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wp_die();
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}
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public function critcss_save_callback() {
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$error = false;
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$status = false;
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$response = array();
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// Ajax handler to write a critical CSS to the filesystem
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// Check referer.
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check_ajax_referer( 'save_critcss_nonce', 'critcss_save_nonce' );
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// Allow empty contents for MANUAL rules (as they are fetched later).
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if ( current_user_can( 'manage_options' ) && empty( $_POST['critcssfile'] ) ) {
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$critcssfile = false;
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$status = true;
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} elseif ( current_user_can( 'manage_options' ) && $this->critcss_check_filename( $_POST['critcssfile'] ) ) {
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// Or check user permissios and filename
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// Set critical CSS content.
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$critcsscontents = stripslashes( $_POST['critcsscontents'] );
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// If there is content and it's valid, write the file.
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if ( $critcsscontents && autoptimizeCriticalCSSCore::ao_ccss_check_contents( $critcsscontents ) ) {
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// Set file path and status.
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$critcssfile = AO_CCSS_DIR . strip_tags( $_POST['critcssfile'] );
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$status = file_put_contents( $critcssfile, $critcsscontents, LOCK_EX );
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// Or set as error.
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} else {
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$error = true;
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}
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// Or just set an error.
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} else {
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$error = true;
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}
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// Prepare response.
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if ( ! $status || $error ) {
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$response['code'] = '500';
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$response['string'] = 'Error saving file ' . $critcssfile . '.';
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} else {
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$response['code'] = '200';
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if ( $critcssfile ) {
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$response['string'] = 'File ' . $critcssfile . ' saved.';
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} else {
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$response['string'] = 'Empty content do not need to be saved.';
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}
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}
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// Dispatch respose.
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echo json_encode( $response );
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// Close ajax request.
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wp_die();
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}
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public function critcss_rm_callback() {
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// Ajax handler to delete a critical CSS from the filesystem
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// Check referer.
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check_ajax_referer( 'rm_critcss_nonce', 'critcss_rm_nonce' );
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// Initialize error and status flags.
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$error = true;
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$status = false;
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// Allow no file for MANUAL rules (as they may not exist just yet).
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if ( current_user_can( 'manage_options' ) && empty( $_POST['critcssfile'] ) ) {
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$error = false;
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} elseif ( current_user_can( 'manage_options' ) && $this->critcss_check_filename( $_POST['critcssfile'] ) ) {
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// Or check user permissios and filename
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// Set file path and delete it.
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$critcssfile = AO_CCSS_DIR . strip_tags( $_POST['critcssfile'] );
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if ( file_exists( $critcssfile ) ) {
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$status = unlink( $critcssfile );
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$error = false;
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}
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}
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// Prepare response.
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if ( $error ) {
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$response['code'] = '500';
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$response['string'] = 'Error removing file ' . $critcssfile . '.';
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} else {
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$response['code'] = '200';
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if ( $status ) {
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$response['string'] = 'File ' . $critcssfile . ' removed.';
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} else {
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$response['string'] = 'No file to be removed.';
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}
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}
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// Dispatch respose.
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echo json_encode( $response );
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// Close ajax request.
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wp_die();
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}
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public function critcss_rm_all_callback() {
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// Ajax handler to delete a critical CSS from the filesystem
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// Check referer.
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check_ajax_referer( 'rm_critcss_all_nonce', 'critcss_rm_all_nonce' );
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// Initialize error and status flags.
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$error = true;
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$status = false;
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// Remove all ccss files on filesystem.
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if ( current_user_can( 'manage_options' ) ) {
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if ( file_exists( AO_CCSS_DIR ) && is_dir( AO_CCSS_DIR ) ) {
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array_map( 'unlink', glob( AO_CCSS_DIR . 'ccss_*.css', GLOB_BRACE ) );
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$error = false;
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$status = true;
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}
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}
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// Prepare response.
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if ( $error ) {
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$response['code'] = '500';
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$response['string'] = 'Error removing all critical CSS files.';
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} else {
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$response['code'] = '200';
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if ( $status ) {
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$response['string'] = 'Critical CSS Files removed.';
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} else {
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$response['string'] = 'No file removed.';
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}
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}
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// Dispatch respose.
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echo json_encode( $response );
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// Close ajax request.
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wp_die();
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}
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public function ao_ccss_export_callback() {
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// Ajax handler export settings
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// Check referer.
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check_ajax_referer( 'ao_ccss_export_nonce', 'ao_ccss_export_nonce' );
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if ( ! class_exists( 'ZipArchive' ) ) {
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$response['code'] = '500';
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$response['msg'] = 'PHP ZipArchive not present, cannot create zipfile';
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echo json_encode( $response );
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wp_die();
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}
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// Init array, get options and prepare the raw object.
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$settings = array();
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$settings['rules'] = get_option( 'autoptimize_ccss_rules' );
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$settings['additional'] = get_option( 'autoptimize_ccss_additional' );
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$settings['viewport'] = get_option( 'autoptimize_ccss_viewport' );
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$settings['finclude'] = get_option( 'autoptimize_ccss_finclude' );
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$settings['rtimelimit'] = get_option( 'autoptimize_ccss_rtimelimit' );
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$settings['noptimize'] = get_option( 'autoptimize_ccss_noptimize' );
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$settings['debug'] = get_option( 'autoptimize_ccss_debug' );
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$settings['key'] = get_option( 'autoptimize_ccss_key' );
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// Initialize error flag.
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$error = true;
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// Check user permissions.
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if ( current_user_can( 'manage_options' ) ) {
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// Prepare settings file path and content.
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$exportfile = AO_CCSS_DIR . 'settings.json';
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$contents = json_encode( $settings );
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$status = file_put_contents( $exportfile, $contents, LOCK_EX );
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$error = false;
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}
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// Prepare archive.
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$zipfile = AO_CCSS_DIR . date( 'Ymd-H\hi' ) . '_ao_ccss_settings.zip';
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$file = pathinfo( $zipfile, PATHINFO_BASENAME );
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$zip = new ZipArchive();
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$ret = $zip->open( $zipfile, ZipArchive::CREATE );
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if ( true !== $ret ) {
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$error = true;
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} else {
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$zip->addFile( AO_CCSS_DIR . 'settings.json', 'settings.json' );
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if ( file_exists( AO_CCSS_DIR . 'queue.json' ) ) {
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$zip->addFile( AO_CCSS_DIR . 'queue.json', 'queue.json' );
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}
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$options = array(
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'add_path' => './',
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'remove_all_path' => true,
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);
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$zip->addGlob( AO_CCSS_DIR . '*.css', 0, $options );
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$zip->close();
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}
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// Prepare response.
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if ( ! $status || $error ) {
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$response['code'] = '500';
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$response['msg'] = 'Error saving file ' . $file . ', code: ' . $ret;
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} else {
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$response['code'] = '200';
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$response['msg'] = 'File ' . $file . ' saved.';
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$response['file'] = $file;
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}
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// Dispatch respose.
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echo json_encode( $response );
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// Close ajax request.
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wp_die();
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}
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public function ao_ccss_import_callback() {
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// Ajax handler import settings
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// Check referer.
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check_ajax_referer( 'ao_ccss_import_nonce', 'ao_ccss_import_nonce' );
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// Initialize error flag.
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$error = false;
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// Process an uploaded file with no errors.
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if ( current_user_can( 'manage_options' ) && ! $_FILES['file']['error'] && $_FILES['file']['size'] < 500001 && strpos( $_FILES['file']['name'], '.zip' ) === strlen( $_FILES['file']['name'] ) - 4 ) {
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// create tmp dir with hard guess name in AO_CCSS_DIR.
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$_secret_dir = wp_hash( uniqid( md5( AUTOPTIMIZE_CACHE_URL ), true ) );
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$_import_tmp_dir = trailingslashit( AO_CCSS_DIR . $_secret_dir );
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mkdir( $_import_tmp_dir );
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// Save file to that tmp directory but give it our own name to prevent directory traversal risks when using original name.
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$zipfile = $_import_tmp_dir . uniqid( 'import_settings-', true ) . '.zip';
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move_uploaded_file( $_FILES['file']['tmp_name'], $zipfile );
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// Extract archive in the tmp directory.
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$zip = new ZipArchive;
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if ( $zip->open( $zipfile ) === true ) {
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// loop through all files in the zipfile.
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for ($i = 0; $i < $zip->numFiles; $i++) {
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// but only extract known good files.
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if ( preg_match('/^settings\.json$|^ccss_[a-z0-9]{32}\.css$/', $zip->getNameIndex( $i ) ) > 0 ) {
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$zip->extractTo( AO_CCSS_DIR, $zip->getNameIndex( $i ) );
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}
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}
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$zip->close();
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} else {
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$error = 'could not extract';
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}
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// and remove temp. dir with all contents (the import-zipfile).
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$this->rrmdir( $_import_tmp_dir );
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if ( ! $error ) {
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// Archive extraction ok, continue importing settings from AO_CCSS_DIR.
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// Settings file.
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$importfile = AO_CCSS_DIR . 'settings.json';
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if ( file_exists( $importfile ) ) {
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// Get settings and turn them into an object.
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$settings = json_decode( file_get_contents( $importfile ), true );
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// Update options.
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update_option( 'autoptimize_ccss_rules', $settings['rules'] );
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update_option( 'autoptimize_ccss_additional', $settings['additional'] );
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update_option( 'autoptimize_ccss_viewport', $settings['viewport'] );
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update_option( 'autoptimize_ccss_finclude', $settings['finclude'] );
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update_option( 'autoptimize_ccss_rtimelimit', $settings['rtimelimit'] );
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update_option( 'autoptimize_ccss_noptimize', $settings['noptimize'] );
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update_option( 'autoptimize_ccss_debug', $settings['debug'] );
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update_option( 'autoptimize_ccss_key', $settings['key'] );
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} else {
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// Settings file doesn't exist, update error flag.
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$error = 'settings file does not exist';
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}
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}
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} else {
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$error = 'file could not be saved';
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}
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// Prepare response.
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if ( $error ) {
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$response['code'] = '500';
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$response['msg'] = 'Error importing settings: ' . $error;
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} else {
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$response['code'] = '200';
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$response['msg'] = 'Settings imported successfully';
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}
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// Dispatch respose.
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echo json_encode( $response );
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// Close ajax request.
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wp_die();
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}
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public function critcss_check_filename( $filename ) {
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// Try to avoid directory traversal when reading/writing/deleting critical CSS files.
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if ( strpos( $filename, 'ccss_' ) !== 0 ) {
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return false;
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} elseif ( substr( $filename, -4, 4 ) !== '.css' ) {
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return false;
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} elseif ( sanitize_file_name( $filename ) !== $filename ) {
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// Use WordPress core's sanitize_file_name to see if anything fishy is going on.
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return false;
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} else {
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return true;
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}
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}
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public function rrmdir( $path ) {
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// recursively remove a directory as found on
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// https://andy-carter.com/blog/recursively-remove-a-directory-in-php.
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$files = glob($path . '/*');
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foreach ( $files as $file ) {
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is_dir( $file ) ? $this->rrmdir( $file ) : unlink( $file );
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}
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rmdir( $path );
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return;
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}
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}
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