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<?php
/**
* The setup for all MediaWiki processes (both web-based and CLI).
*
* The entry point (such as WebStart.php and doMaintenance.php) has these responsibilities:
* - The entry point MUST:
* - define the 'MEDIAWIKI' constant.
* - The entry point SHOULD:
* - define the 'MW_ENTRY_POINT' constant.
* - display an error if MW_CONFIG_CALLBACK is not defined and the
* file specified in MW_CONFIG_FILE (or the LocalSettings.php default location)
* does not exist. The error should either be sent before and instead
* of the Setup.php inclusion, or (if it needs classes and dependencies
* from core) the error can be displayed via a MW_CONFIG_CALLBACK,
* which must then abort the process to prevent the rest of Setup.php
* from executing.
*
* This file does:
* - run-time environment checks,
* - define MW_INSTALL_PATH, $IP, and $wgBaseDirectory,
* - load autoloaders, constants, default settings, and global functions,
* - load the site configuration (e.g. LocalSettings.php),
* - load the enabled extensions (via ExtensionRegistry),
* - trivial expansion of site configuration defaults and shortcuts
* (no calls to MediaWikiServices or other parts of MediaWiki),
* - initialization of:
* - PHP run-time (setlocale, memory limit, default date timezone)
* - the debug logger (MWDebug)
* - the service container (MediaWikiServices)
* - the exception handler (MWExceptionHandler)
* - the session manager (SessionManager)
* - complex expansion of site configuration defaults (those that require
* calling into MediaWikiServices, global functions, or other classes.).
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
// phpcs:disable MediaWiki.Usage.DeprecatedGlobalVariables
use MediaWiki\Config\SiteConfiguration;
use MediaWiki\Context\RequestContext;
use MediaWiki\Debug\MWDebug;
use MediaWiki\Deferred\DeferredUpdates;
use MediaWiki\HookContainer\FauxGlobalHookArray;
use MediaWiki\HookContainer\HookRunner;
use MediaWiki\Language\Language;
use MediaWiki\Logger\LoggerFactory;
use MediaWiki\MainConfigNames;
use MediaWiki\MainConfigSchema;
use MediaWiki\MediaWikiServices;
use MediaWiki\Message\Message;
use MediaWiki\Registration\ExtensionRegistry;
use MediaWiki\Registration\MissingExtensionException;
use MediaWiki\Request\HeaderCallback;
use MediaWiki\Settings\DynamicDefaultValues;
use MediaWiki\Settings\LocalSettingsLoader;
use MediaWiki\Settings\SettingsBuilder;
use MediaWiki\Settings\Source\PhpSettingsSource;
use MediaWiki\Settings\Source\ReflectionSchemaSource;
use MediaWiki\Settings\WikiFarmSettingsLoader;
use MediaWiki\StubObject\StubGlobalUser;
use MediaWiki\StubObject\StubUserLang;
use MediaWiki\Title\Title;
use MediaWiki\User\User;
use Psr\Log\LoggerInterface;
use Wikimedia\RequestTimeout\RequestTimeout;
/**
* Environment checks
*
* These are inline checks done before we include any source files,
* and thus these conditions may be assumed by all source code.
*/
// This file must be included from a valid entry point (e.g. WebStart.php, Maintenance.php)
if ( !defined( 'MEDIAWIKI' ) ) {
exit( 1 );
}
// PHP must not be configured to overload mbstring functions. (T5782, T122807)
// This was deprecated by upstream in PHP 7.2 and was removed in PHP 8.0.
if ( ini_get( 'mbstring.func_overload' ) ) {
die( 'MediaWiki does not support installations where mbstring.func_overload is non-zero.' );
}
// The MW_ENTRY_POINT constant must always exists, to make it safe to access.
// For compat, we do support older and custom MW entrypoints that don't set this,
// in which case we assign a default here.
if ( !defined( 'MW_ENTRY_POINT' ) ) {
/**
* The entry point, which may be either the script filename without the
* file extension, or "cli" for maintenance scripts, or "unknown" for any
* entry point that does not set the constant.
*/
define( 'MW_ENTRY_POINT', 'unknown' );
}
// The $IP variable is defined for use by LocalSettings.php.
// It is made available as a global variable for backwards compatibility.
//
// Source code should instead use the MW_INSTALL_PATH constant, or the
// MainConfigNames::BaseDirectory setting. The BaseDirectory setting is set further
// down in Setup.php to the value of MW_INSTALL_PATH.
global $IP;
$IP = wfDetectInstallPath(); // ensure MW_INSTALL_PATH is defined
/**
* Pre-config setup: Before loading LocalSettings.php
*
* These are changes and additions to runtime that don't vary on site configuration.
*/
require_once MW_INSTALL_PATH . '/includes/AutoLoader.php';
require_once MW_INSTALL_PATH . '/includes/Defines.php';
// Assert that composer dependencies were successfully loaded
if ( !interface_exists( LoggerInterface::class ) ) {
$message = (
'<strong>Error: Missing external libraries.</strong> ' .
'MediaWiki depends on external libraries bundled with most MediaWiki distributions. ' .
"When installing MediaWiki from its Git reposistory, these must be installed separately.\n\n" .
'Please see the <a href="https://www.mediawiki.org/wiki/Download_from_Git' .
'#Fetch_external_libraries">instructions for installing libraries</a> on mediawiki.org ' .
'for help on installing the required libraries.'
);
http_response_code( 500 );
echo $message;
error_log( $message );
exit( 1 );
}
// Deprecated global variable for backwards-compatibility.
// New code should check MW_ENTRY_POINT directly.
$wgCommandLineMode = MW_ENTRY_POINT === 'cli';
/**
* $wgConf hold the site configuration.
* Not used for much in a default install.
* @since 1.5
*/
$wgConf = new SiteConfiguration;
$wgAutoloadClasses ??= [];
$wgSettings = SettingsBuilder::getInstance();
if ( defined( 'MW_USE_CONFIG_SCHEMA_CLASS' ) ) {
// Load config schema from MainConfigSchema. Useful for running scripts that
// generate other representations of the config schema. This is slow, so it
// should not be used for serving web traffic.
$wgSettings->load( new ReflectionSchemaSource( MainConfigSchema::class ) );
} else {
$wgSettings->load( new PhpSettingsSource( MW_INSTALL_PATH . '/includes/config-schema.php' ) );
}
require_once MW_INSTALL_PATH . '/includes/GlobalFunctions.php';
HeaderCallback::register();
// Set the encoding used by PHP for reading HTTP input, and writing output.
// This is also the default for mbstring functions.
mb_internal_encoding( 'UTF-8' );
/**
* Load LocalSettings.php
*/
// Initialize some config settings with dynamic defaults, and
// make default settings available in globals for use in LocalSettings.php.
$wgSettings->putConfigValues( [
MainConfigNames::BaseDirectory => MW_INSTALL_PATH,
MainConfigNames::ExtensionDirectory => MW_INSTALL_PATH . '/extensions',
MainConfigNames::StyleDirectory => MW_INSTALL_PATH . '/skins',
MainConfigNames::ServiceWiringFiles => [ MW_INSTALL_PATH . '/includes/ServiceWiring.php' ],
'Version' => MW_VERSION,
] );
$wgSettings->apply();
// $wgSettings->apply() puts all configuration into global variables.
// If we are not in global scope, make all relevant globals available
// in this file's scope as well.
$wgScopeTest = 'MediaWiki Setup.php scope test';
if ( !isset( $GLOBALS['wgScopeTest'] ) || $GLOBALS['wgScopeTest'] !== $wgScopeTest ) {
foreach ( $wgSettings->getConfigSchema()->getDefinedKeys() as $key ) {
$var = "wg$key";
// phpcs:ignore MediaWiki.NamingConventions.ValidGlobalName.allowedPrefix
global $$var;
}
unset( $key, $var );
}
unset( $wgScopeTest );
try {
if ( defined( 'MW_CONFIG_CALLBACK' ) ) {
call_user_func( MW_CONFIG_CALLBACK, $wgSettings );
} else {
wfDetectLocalSettingsFile( MW_INSTALL_PATH );
if ( getenv( 'MW_USE_LOCAL_SETTINGS_LOADER' ) ) {
// NOTE: This will not work for configuration variables that use a prefix
// other than "wg".
$localSettingsLoader = new LocalSettingsLoader( $wgSettings, MW_INSTALL_PATH );
$localSettingsLoader->loadLocalSettingsFile( MW_CONFIG_FILE );
unset( $localSettingsLoader );
} else {
if ( str_ends_with( MW_CONFIG_FILE, '.php' ) ) {
// make defaults available as globals
$wgSettings->apply();
require_once MW_CONFIG_FILE;
} else {
$wgSettings->loadFile( MW_CONFIG_FILE );
}
}
}
// Make settings loaded by LocalSettings.php available in globals for use here
$wgSettings->apply();
} catch ( MissingExtensionException $e ) {
// Make a common mistake give a friendly error
$e->render();
}
// If in a wiki-farm, load site-specific settings
if ( $wgSettings->getConfig()->get( MainConfigNames::WikiFarmSettingsDirectory ) ) {
$wikiFarmSettingsLoader = new WikiFarmSettingsLoader( $wgSettings );
$wikiFarmSettingsLoader->loadWikiFarmSettings();
unset( $wikiFarmSettingsLoader );
}
// All settings should be loaded now.
$wgSettings->enterRegistrationStage();
/**
* Customization point after most things are loaded (constants, functions, classes,
* LocalSettings.
* Note that this runs before extensions are registered, and before most singletons become
* available, and before MediaWikiServices is initialized.
*/
if ( defined( 'MW_SETUP_CALLBACK' ) ) {
call_user_func( MW_SETUP_CALLBACK, $wgSettings );
// Make any additional settings available in globals for use here
$wgSettings->apply();
}
// Apply dynamic defaults declared in config schema callbacks.
$dynamicDefaults = new DynamicDefaultValues( $wgSettings->getConfigSchema() );
$dynamicDefaults->applyDynamicDefaults( $wgSettings->getConfigBuilder() );
// Make updated config available in global scope.
$wgSettings->apply();
// Apply dynamic defaults implemented in SetupDynamicConfig.php.
// Ideally, all logic in SetupDynamicConfig would be converted to
// callbacks in the config schema.
require __DIR__ . '/SetupDynamicConfig.php';
if ( defined( 'MW_AUTOLOAD_TEST_CLASSES' ) ) {
require_once __DIR__ . '/../tests/common/TestsAutoLoader.php';
}
if ( $wgBaseDirectory !== MW_INSTALL_PATH ) {
throw new FatalError(
'$wgBaseDirectory must not be modified in settings files! ' .
'Use the MW_INSTALL_PATH environment variable to override the installation root directory.'
);
}
// Start time limit
if ( $wgRequestTimeLimit && MW_ENTRY_POINT !== 'cli' ) {
RequestTimeout::singleton()->setWallTimeLimit( $wgRequestTimeLimit );
}
/**
* Load queued extensions
*/
if ( defined( 'MW_AUTOLOAD_TEST_CLASSES' ) ) {
ExtensionRegistry::getInstance()->setLoadTestClassesAndNamespaces( true );
}
ExtensionRegistry::getInstance()->setSettingsBuilder( $wgSettings );
ExtensionRegistry::getInstance()->loadFromQueue();
// Don't let any other extensions load
ExtensionRegistry::getInstance()->finish();
/**
* Customization point after ALL loading (constants, functions, classes,
* LocalSettings, extensions, dynamic defaults).
* Note that this runs before MediaWikiServices is initialized.
*/
if ( defined( 'MW_FINAL_SETUP_CALLBACK' ) ) {
call_user_func( MW_FINAL_SETUP_CALLBACK, $wgSettings );
// Make any additional settings available in globals for use below
$wgSettings->apply();
}
// Config can no longer be changed.
$wgSettings->enterReadOnlyStage();
// Set an appropriate locale (T291234)
// setlocale() will return the locale name actually set.
// The putenv() is meant to propagate the choice of locale to shell commands
// so that they will interpret UTF-8 correctly. If you have a problem with a
// shell command and need to send a special locale, you can override the locale
// with Command::environment().
putenv( "LC_ALL=" . setlocale( LC_ALL, 'C.UTF-8', 'C' ) );
// Set PHP runtime to the desired timezone
date_default_timezone_set( $wgLocaltimezone );
MWDebug::setup();
// Enable the global service locator.
// Trivial expansion of site configuration should go before this point.
// Any non-trivial expansion that requires calling into MediaWikiServices or other parts of MW.
MediaWikiServices::allowGlobalInstance();
// Define a constant that indicates that the bootstrapping of the service locator
// is complete.
define( 'MW_SERVICE_BOOTSTRAP_COMPLETE', 1 );
MWExceptionRenderer::setShowExceptionDetails( $wgShowExceptionDetails );
if ( !defined( 'MW_PHPUNIT_TEST' ) ) {
// Never install the handler in PHPUnit tests, otherwise PHPUnit's own handler will be unset and things
// like convertWarningsToExceptions won't work.
MWExceptionHandler::installHandler( $wgLogExceptionBacktrace, $wgPropagateErrors );
}
Profiler::init( $wgProfiler );
// Non-trivial validation of: $wgServer
// The FatalError page only renders cleanly after MWExceptionHandler is installed.
if ( $wgServer === false ) {
// T30798: $wgServer must be explicitly set
throw new FatalError(
'$wgServer must be set in LocalSettings.php. ' .
'See <a href="https://www.mediawiki.org/wiki/Manual:$wgServer">' .
'https://www.mediawiki.org/wiki/Manual:$wgServer</a>.'
);
}
// Set up a fake $wgHooks array.
// XXX: It would be nice if we could still get the originally configured hook handlers
// using the MainConfigNames::Hooks setting, but it's not really needed,
// since we need the HookContainer to be initialized first anyway.
global $wgHooks;
$wgHooks = new FauxGlobalHookArray(
MediaWikiServices::getInstance()->getHookContainer(),
$wgHooks
);
// Non-trivial expansion of: $wgCanonicalServer, $wgServerName.
// These require calling global functions.
// Also here are other settings that further depend on these two.
if ( $wgCanonicalServer === false ) {
$wgCanonicalServer = MediaWikiServices::getInstance()->getUrlUtils()->getCanonicalServer();
}
$wgVirtualRestConfig['global']['domain'] = $wgCanonicalServer;
if ( $wgServerName !== false ) {
wfWarn( '$wgServerName should be derived from $wgCanonicalServer, '
. 'not customized. Overwriting $wgServerName.' );
}
$wgServerName = parse_url( $wgCanonicalServer, PHP_URL_HOST );
// $wgEmergencyContact and $wgPasswordSender may be false or empty string (T104142)
if ( !$wgEmergencyContact ) {
$wgEmergencyContact = 'wikiadmin@' . $wgServerName;
}
if ( !$wgPasswordSender ) {
$wgPasswordSender = 'apache@' . $wgServerName;
}
if ( !$wgNoReplyAddress ) {
$wgNoReplyAddress = $wgPasswordSender;
}
// Non-trivial expansion of: $wgSecureLogin
// (due to calling wfWarn).
if ( $wgSecureLogin && substr( $wgServer, 0, 2 ) !== '//' ) {
$wgSecureLogin = false;
wfWarn( 'Secure login was enabled on a server that only supports '
. 'HTTP or HTTPS. Disabling secure login.' );
}
// Now that GlobalFunctions is loaded, set defaults that depend on it.
if ( $wgTmpDirectory === false ) {
$wgTmpDirectory = wfTempDir();
}
if ( $wgSharedDB && $wgSharedTables ) {
// Apply $wgSharedDB table aliases for the local LB (all non-foreign DB connections)
MediaWikiServices::getInstance()->getDBLoadBalancer()->setTableAliases(
array_fill_keys(
$wgSharedTables,
[
'dbname' => $wgSharedDB,
'schema' => $wgSharedSchema,
'prefix' => $wgSharedPrefix
]
)
);
}
// Raise the memory limit if it's too low
// NOTE: This use wfDebug, and must remain after the MWDebug::setup() call.
wfMemoryLimit( $wgMemoryLimit );
// Explicit globals, so this works with bootstrap.php
global $wgRequest, $wgInitialSessionId;
// Initialize the request object in $wgRequest
$wgRequest = RequestContext::getMain()->getRequest(); // BackCompat
// Make sure that object caching does not undermine the ChronologyProtector improvements
if ( $wgRequest->getCookie( 'UseDC', '' ) === 'master' ) {
// The user is pinned to the primary DC, meaning that they made recent changes which should
// be reflected in their subsequent web requests. Avoid the use of interim cache keys because
// they use a blind TTL and could be stale if an object changes twice in a short time span.
MediaWikiServices::getInstance()->getMainWANObjectCache()->useInterimHoldOffCaching( false );
}
// Useful debug output
( static function () {
global $wgRequest;
$logger = LoggerFactory::getInstance( 'wfDebug' );
if ( MW_ENTRY_POINT === 'cli' ) {
$self = $_SERVER['PHP_SELF'] ?? '';
$logger->debug( "\n\nStart command line script $self" );
} else {
$debug = "\n\nStart request {$wgRequest->getMethod()} {$wgRequest->getRequestURL()}\n";
$debug .= "IP: " . $wgRequest->getIP() . "\n";
$debug .= "HTTP HEADERS:\n";
foreach ( $wgRequest->getAllHeaders() as $name => $value ) {
$debug .= "$name: $value\n";
}
$debug .= "(end headers)";
$logger->debug( $debug );
}
} )();
// Most of the config is out, some might want to run hooks here.
( new HookRunner( MediaWikiServices::getInstance()->getHookContainer() ) )->onSetupAfterCache();
// Now that variant lists may be available, parse any action paths and article paths
// as query parameters.
//
// Skip title interpolation on API queries where it is useless and sometimes harmful (T18019).
//
// Optimization: Skip on load.php and all other entrypoints besides index.php to save time.
//
// TODO: Figure out if this can be safely done after everything else in Setup.php (e.g. any
// hooks or other state that would miss this?). If so, move to wfIndexMain or MediaWiki::run.
if ( MW_ENTRY_POINT === 'index' ) {
$wgRequest->interpolateTitle();
}
/**
* @var MediaWiki\Session\SessionId|null $wgInitialSessionId The persistent session ID (if any) loaded at startup
*/
$wgInitialSessionId = null;
if ( !defined( 'MW_NO_SESSION' ) && MW_ENTRY_POINT !== 'cli' ) {
// If session.auto_start is there, we can't touch session name
if ( $wgPHPSessionHandling !== 'disable' && !wfIniGetBool( 'session.auto_start' ) ) {
HeaderCallback::warnIfHeadersSent();
session_name( $wgSessionName ?: $wgCookiePrefix . '_session' );
}
// Create the SessionManager singleton and set up our session handler,
// unless we're specifically asked not to.
if ( !defined( 'MW_NO_SESSION_HANDLER' ) ) {
MediaWiki\Session\PHPSessionHandler::install(
MediaWiki\Session\SessionManager::singleton()
);
}
$contLang = MediaWikiServices::getInstance()->getContentLanguage();
// Initialize the session
try {
$session = MediaWiki\Session\SessionManager::getGlobalSession();
} catch ( MediaWiki\Session\SessionOverflowException $ex ) {
// The exception is because the request had multiple possible
// sessions tied for top priority. Report this to the user.
$list = [];
foreach ( $ex->getSessionInfos() as $info ) {
$list[] = $info->getProvider()->describe( $contLang );
}
$list = $contLang->listToText( $list );
throw new HttpError( 400,
Message::newFromKey( 'sessionmanager-tie', $list )->inLanguage( $contLang )
);
}
unset( $contLang );
if ( $session->isPersistent() ) {
$wgInitialSessionId = $session->getSessionId();
}
$session->renew();
if ( MediaWiki\Session\PHPSessionHandler::isEnabled() &&
( $session->isPersistent() || $session->shouldRememberUser() ) &&
session_id() !== $session->getId()
) {
// Start the PHP-session for backwards compatibility
if ( session_id() !== '' ) {
wfDebugLog( 'session', 'PHP session {old_id} was already started, changing to {new_id}', 'all', [
'old_id' => session_id(),
'new_id' => $session->getId(),
] );
session_write_close();
}
session_id( $session->getId() );
session_start();
}
unset( $session );
} else {
// Even if we didn't set up a global Session, still install our session
// handler unless specifically requested not to.
if ( !defined( 'MW_NO_SESSION_HANDLER' ) ) {
MediaWiki\Session\PHPSessionHandler::install(
MediaWiki\Session\SessionManager::singleton()
);
}
}
// Explicit globals, so this works with bootstrap.php
global $wgUser, $wgLang, $wgOut, $wgTitle;
/**
* @var User $wgUser
* @deprecated since 1.35, use an available context source when possible, or, as a backup,
* RequestContext::getMain()
*/
$wgUser = new StubGlobalUser( RequestContext::getMain()->getUser() ); // BackCompat
register_shutdown_function( static function () {
StubGlobalUser::$destructorDeprecationDisarmed = true;
} );
/**
* @var Language|StubUserLang $wgLang
*/
$wgLang = new StubUserLang;
/**
* @var MediaWiki\Output\OutputPage $wgOut
*/
$wgOut = RequestContext::getMain()->getOutput(); // BackCompat
/**
* @var Title|null $wgTitle
*/
$wgTitle = null;
// Explicit globals, so this works with bootstrap.php
global $wgFullyInitialised, $wgExtensionFunctions;
// Extension setup functions
// Entries should be added to this variable during the inclusion
// of the extension file. This allows the extension to perform
// any necessary initialisation in the fully initialised environment
foreach ( $wgExtensionFunctions as $func ) {
call_user_func( $func );
}
unset( $func ); // no global pollution; destroy reference
// If the session user has a 0 id but a valid name, that means we need to
// autocreate it.
if ( !defined( 'MW_NO_SESSION' ) && MW_ENTRY_POINT !== 'cli' ) {
$sessionUser = MediaWiki\Session\SessionManager::getGlobalSession()->getUser();
if ( $sessionUser->getId() === 0 &&
MediaWikiServices::getInstance()->getUserNameUtils()->isValid( $sessionUser->getName() )
) {
$res = MediaWikiServices::getInstance()->getAuthManager()->autoCreateUser(
$sessionUser,
MediaWiki\Auth\AuthManager::AUTOCREATE_SOURCE_SESSION,
true,
true,
$sessionUser
);
$firstMessage = $res->getMessages( 'error' )[0] ?? $res->getMessages( 'warning' )[0] ?? null;
\MediaWiki\Logger\LoggerFactory::getInstance( 'authevents' )->info( 'Autocreation attempt', [
'event' => 'autocreate',
'successful' => $res->isGood(),
'status' => $firstMessage ? $firstMessage->getKey() : '-',
] );
unset( $res );
unset( $firstMessage );
}
unset( $sessionUser );
}
// Optimization: Avoid overhead from DeferredUpdates and Pingback deps when turned off.
if ( MW_ENTRY_POINT !== 'cli' && $wgPingback ) {
// NOTE: Do not refactor to inject Config or otherwise make unconditional service call.
//
// On a plain install of MediaWiki, Pingback is likely the *only* feature
// involving DeferredUpdates or DB_PRIMARY on a regular page view.
// To allow for error recovery and fault isolation, let admins turn this
// off completely. (T269516)
DeferredUpdates::addCallableUpdate( static function () {
MediaWikiServices::getInstance()->getPingback()->run();
} );
}
$settingsWarnings = $wgSettings->getWarnings();
if ( $settingsWarnings ) {
$logger = LoggerFactory::getInstance( 'Settings' );
foreach ( $settingsWarnings as $msg ) {
$logger->warning( $msg );
}
unset( $logger );
}
unset( $settingsWarnings );
// Explicit globals, so this works with bootstrap.php
global $wgFullyInitialised;
$wgFullyInitialised = true;
// T264370
if ( !defined( 'MW_NO_SESSION' ) && MW_ENTRY_POINT !== 'cli' ) {
MediaWiki\Session\SessionManager::singleton()->logPotentialSessionLeakage();
}
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