WordPress/wp-includes/class-wp-recovery-mode.php

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<?php
/**
* Error Protection API: WP_Recovery_Mode class
*
* @package WordPress
* @since 5.2.0
*/
/**
* Core class used to implement Recovery Mode.
*
* @since 5.2.0
*/
Code Modernization: Add `AllowDynamicProperties` attribute to all (parent) classes. Dynamic (non-explicitly declared) properties are deprecated as of PHP 8.2 and are expected to become a fatal error in PHP 9.0. There are a number of ways to mitigate this: * If it is an accidental typo for a declared property: fix the typo. * For known properties: declare them on the class. * For unknown properties: add the magic `__get()`, `__set()`, et al. methods to the class or let the class extend `stdClass` which has highly optimized versions of these magic methods built in. * For unknown ''use'' of dynamic properties, the `#[AllowDynamicProperties]` attribute can be added to the class. The attribute will automatically be inherited by child classes. Trac ticket #56034 is open to investigate and handle the third and fourth type of situations, however it has become clear this will need more time and will not be ready in time for WP 6.1. To reduce “noise” in the meantime, both in the error logs of WP users moving onto PHP 8.2, in the test run logs of WP itself, in test runs of plugins and themes, as well as to prevent duplicate tickets from being opened for the same issue, this commit adds the `#[AllowDynamicProperties]` attribute to all “parent” classes in WP. The logic used for this commit is as follows: * If a class already has the attribute: no action needed. * If a class does not `extend`: add the attribute. * If a class does `extend`: - If it extends `stdClass`: no action needed (as `stdClass` supports dynamic properties). - If it extends a PHP native class: add the attribute. - If it extends a class from one of WP's external dependencies: add the attribute. * In all other cases: no action — the attribute should not be needed as child classes inherit from the parent. Whether or not a class contains magic methods has not been taken into account, as a review of the currently existing magic methods has shown that those are generally not sturdy enough and often even set dynamic properties (which they should not). See the [https://www.youtube.com/watch?v=vDZWepDQQVE live stream from August 16, 2022] for more details. This commit only affects classes in the `src` directory of WordPress core. * Tests should not get this attribute, but should be fixed to not use dynamic properties instead. Patches for this are already being committed under ticket #56033. * While a number bundled themes (2014, 2019, 2020, 2021) contain classes, they are not a part of this commit and may be updated separately. Reference: [https://wiki.php.net/rfc/deprecate_dynamic_properties PHP RFC: Deprecate dynamic properties]. Follow-up to [53922]. Props jrf, hellofromTonya, markjaquith, peterwilsoncc, costdev, knutsp, aristath. See #56513, #56034. Built from https://develop.svn.wordpress.org/trunk@54133 git-svn-id: http://core.svn.wordpress.org/trunk@53692 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2022-09-12 17:47:14 +02:00
#[AllowDynamicProperties]
class WP_Recovery_Mode {
const EXIT_ACTION = 'exit_recovery_mode';
/**
* Service to handle cookies.
*
* @since 5.2.0
* @var WP_Recovery_Mode_Cookie_Service
*/
private $cookie_service;
/**
* Service to generate a recovery mode key.
*
* @since 5.2.0
* @var WP_Recovery_Mode_Key_Service
*/
private $key_service;
/**
* Service to generate and validate recovery mode links.
*
* @since 5.2.0
* @var WP_Recovery_Mode_Link_Service
*/
private $link_service;
/**
* Service to handle sending an email with a recovery mode link.
*
* @since 5.2.0
* @var WP_Recovery_Mode_Email_Service
*/
private $email_service;
/**
* Is recovery mode initialized.
*
* @since 5.2.0
* @var bool
*/
private $is_initialized = false;
/**
* Is recovery mode active in this session.
*
* @since 5.2.0
* @var bool
*/
private $is_active = false;
/**
* Get an ID representing the current recovery mode session.
*
* @since 5.2.0
* @var string
*/
private $session_id = '';
/**
* WP_Recovery_Mode constructor.
*
* @since 5.2.0
*/
public function __construct() {
$this->cookie_service = new WP_Recovery_Mode_Cookie_Service();
$this->key_service = new WP_Recovery_Mode_Key_Service();
$this->link_service = new WP_Recovery_Mode_Link_Service( $this->cookie_service, $this->key_service );
$this->email_service = new WP_Recovery_Mode_Email_Service( $this->link_service );
}
/**
* Initialize recovery mode for the current request.
*
* @since 5.2.0
*/
public function initialize() {
$this->is_initialized = true;
add_action( 'wp_logout', array( $this, 'exit_recovery_mode' ) );
add_action( 'login_form_' . self::EXIT_ACTION, array( $this, 'handle_exit_recovery_mode' ) );
add_action( 'recovery_mode_clean_expired_keys', array( $this, 'clean_expired_keys' ) );
if ( ! wp_next_scheduled( 'recovery_mode_clean_expired_keys' ) && ! wp_installing() ) {
wp_schedule_event( time(), 'daily', 'recovery_mode_clean_expired_keys' );
}
if ( defined( 'WP_RECOVERY_MODE_SESSION_ID' ) ) {
$this->is_active = true;
$this->session_id = WP_RECOVERY_MODE_SESSION_ID;
return;
}
if ( $this->cookie_service->is_cookie_set() ) {
$this->handle_cookie();
return;
}
$this->link_service->handle_begin_link( $this->get_link_ttl() );
}
/**
* Checks whether recovery mode is active.
*
* This will not change after recovery mode has been initialized. {@see WP_Recovery_Mode::run()}.
*
* @since 5.2.0
*
* @return bool True if recovery mode is active, false otherwise.
*/
public function is_active() {
return $this->is_active;
}
/**
* Gets the recovery mode session ID.
*
* @since 5.2.0
*
* @return string The session ID if recovery mode is active, empty string otherwise.
*/
public function get_session_id() {
return $this->session_id;
}
/**
* Checks whether recovery mode has been initialized.
*
* Recovery mode should not be used until this point. Initialization happens immediately before loading plugins.
*
* @since 5.2.0
*
* @return bool
*/
public function is_initialized() {
return $this->is_initialized;
}
/**
* Handles a fatal error occurring.
*
* The calling API should immediately die() after calling this function.
*
* @since 5.2.0
*
* @param array $error Error details from `error_get_last()`.
* @return true|WP_Error True if the error was handled and headers have already been sent.
* Or the request will exit to try and catch multiple errors at once.
* WP_Error if an error occurred preventing it from being handled.
*/
public function handle_error( array $error ) {
$extension = $this->get_extension_for_error( $error );
if ( ! $extension || $this->is_network_plugin( $extension ) ) {
return new WP_Error( 'invalid_source', __( 'Error not caused by a plugin or theme.' ) );
}
if ( ! $this->is_active() ) {
if ( ! is_protected_endpoint() ) {
return new WP_Error( 'non_protected_endpoint', __( 'Error occurred on a non-protected endpoint.' ) );
}
if ( ! function_exists( 'wp_generate_password' ) ) {
require_once ABSPATH . WPINC . '/pluggable.php';
}
return $this->email_service->maybe_send_recovery_mode_email( $this->get_email_rate_limit(), $error, $extension );
}
if ( ! $this->store_error( $error ) ) {
return new WP_Error( 'storage_error', __( 'Failed to store the error.' ) );
}
if ( headers_sent() ) {
return true;
}
$this->redirect_protected();
}
/**
* Ends the current recovery mode session.
*
* @since 5.2.0
*
* @return bool True on success, false on failure.
*/
public function exit_recovery_mode() {
if ( ! $this->is_active() ) {
return false;
}
$this->email_service->clear_rate_limit();
$this->cookie_service->clear_cookie();
wp_paused_plugins()->delete_all();
wp_paused_themes()->delete_all();
return true;
}
/**
* Handles a request to exit Recovery Mode.
*
* @since 5.2.0
*/
public function handle_exit_recovery_mode() {
$redirect_to = wp_get_referer();
// Safety check in case referrer returns false.
if ( ! $redirect_to ) {
$redirect_to = is_user_logged_in() ? admin_url() : home_url();
}
if ( ! $this->is_active() ) {
wp_safe_redirect( $redirect_to );
die;
}
if ( ! isset( $_GET['action'] ) || self::EXIT_ACTION !== $_GET['action'] ) {
return;
}
if ( ! isset( $_GET['_wpnonce'] ) || ! wp_verify_nonce( $_GET['_wpnonce'], self::EXIT_ACTION ) ) {
wp_die( __( 'Exit recovery mode link expired.' ), 403 );
}
if ( ! $this->exit_recovery_mode() ) {
wp_die( __( 'Failed to exit recovery mode. Please try again later.' ) );
}
wp_safe_redirect( $redirect_to );
die;
}
/**
* Cleans any recovery mode keys that have expired according to the link TTL.
*
* Executes on a daily cron schedule.
*
* @since 5.2.0
*/
public function clean_expired_keys() {
$this->key_service->clean_expired_keys( $this->get_link_ttl() );
}
/**
* Handles checking for the recovery mode cookie and validating it.
*
* @since 5.2.0
*/
protected function handle_cookie() {
$validated = $this->cookie_service->validate_cookie();
if ( is_wp_error( $validated ) ) {
$this->cookie_service->clear_cookie();
$validated->add_data( array( 'status' => 403 ) );
wp_die( $validated );
}
$session_id = $this->cookie_service->get_session_id_from_cookie();
if ( is_wp_error( $session_id ) ) {
$this->cookie_service->clear_cookie();
$session_id->add_data( array( 'status' => 403 ) );
wp_die( $session_id );
}
$this->is_active = true;
$this->session_id = $session_id;
}
/**
* Gets the rate limit between sending new recovery mode email links.
*
* @since 5.2.0
*
* @return int Rate limit in seconds.
*/
protected function get_email_rate_limit() {
/**
* Filters the rate limit between sending new recovery mode email links.
*
* @since 5.2.0
*
* @param int $rate_limit Time to wait in seconds. Defaults to 1 day.
*/
return apply_filters( 'recovery_mode_email_rate_limit', DAY_IN_SECONDS );
}
/**
* Gets the number of seconds the recovery mode link is valid for.
*
* @since 5.2.0
*
* @return int Interval in seconds.
*/
protected function get_link_ttl() {
$rate_limit = $this->get_email_rate_limit();
$valid_for = $rate_limit;
/**
* Filters the amount of time the recovery mode email link is valid for.
*
* The ttl must be at least as long as the email rate limit.
*
* @since 5.2.0
*
* @param int $valid_for The number of seconds the link is valid for.
*/
$valid_for = apply_filters( 'recovery_mode_email_link_ttl', $valid_for );
return max( $valid_for, $rate_limit );
}
/**
* Gets the extension that the error occurred in.
*
* @since 5.2.0
*
* @global array $wp_theme_directories
*
* @param array $error Error details from `error_get_last()`.
* @return array|false {
* Extension details.
*
* @type string $slug The extension slug. This is the plugin or theme's directory.
* @type string $type The extension type. Either 'plugin' or 'theme'.
* }
*/
protected function get_extension_for_error( $error ) {
global $wp_theme_directories;
if ( ! isset( $error['file'] ) ) {
return false;
}
if ( ! defined( 'WP_PLUGIN_DIR' ) ) {
return false;
}
$error_file = wp_normalize_path( $error['file'] );
$wp_plugin_dir = wp_normalize_path( WP_PLUGIN_DIR );
if ( 0 === strpos( $error_file, $wp_plugin_dir ) ) {
$path = str_replace( $wp_plugin_dir . '/', '', $error_file );
$parts = explode( '/', $path );
return array(
'type' => 'plugin',
'slug' => $parts[0],
);
}
if ( empty( $wp_theme_directories ) ) {
return false;
}
foreach ( $wp_theme_directories as $theme_directory ) {
$theme_directory = wp_normalize_path( $theme_directory );
if ( 0 === strpos( $error_file, $theme_directory ) ) {
$path = str_replace( $theme_directory . '/', '', $error_file );
$parts = explode( '/', $path );
return array(
'type' => 'theme',
'slug' => $parts[0],
);
}
}
return false;
}
/**
* Checks whether the given extension a network activated plugin.
*
* @since 5.2.0
*
* @param array $extension Extension data.
* @return bool True if network plugin, false otherwise.
*/
protected function is_network_plugin( $extension ) {
if ( 'plugin' !== $extension['type'] ) {
return false;
}
if ( ! is_multisite() ) {
return false;
}
$network_plugins = wp_get_active_network_plugins();
foreach ( $network_plugins as $plugin ) {
if ( 0 === strpos( $plugin, $extension['slug'] . '/' ) ) {
return true;
}
}
return false;
}
/**
* Stores the given error so that the extension causing it is paused.
*
* @since 5.2.0
*
* @param array $error Error details from `error_get_last()`.
* @return bool True if the error was stored successfully, false otherwise.
*/
protected function store_error( $error ) {
$extension = $this->get_extension_for_error( $error );
if ( ! $extension ) {
return false;
}
switch ( $extension['type'] ) {
case 'plugin':
return wp_paused_plugins()->set( $extension['slug'], $error );
case 'theme':
return wp_paused_themes()->set( $extension['slug'], $error );
default:
return false;
}
}
/**
* Redirects the current request to allow recovering multiple errors in one go.
*
* The redirection will only happen when on a protected endpoint.
*
* It must be ensured that this method is only called when an error actually occurred and will not occur on the
* next request again. Otherwise it will create a redirect loop.
*
* @since 5.2.0
*/
protected function redirect_protected() {
// Pluggable is usually loaded after plugins, so we manually include it here for redirection functionality.
if ( ! function_exists( 'wp_safe_redirect' ) ) {
require_once ABSPATH . WPINC . '/pluggable.php';
}
$scheme = is_ssl() ? 'https://' : 'http://';
$url = "{$scheme}{$_SERVER['HTTP_HOST']}{$_SERVER['REQUEST_URI']}";
wp_safe_redirect( $url );
exit;
}
}