3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or
6 * (at your option) any later version.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
16 * http://www.gnu.org/copyleft/gpl.html
19 * @author Roan Kattouw
20 * @author Trevor Parscal
23 use MediaWiki\MediaWikiServices
;
24 use Psr\Log\LoggerAwareInterface
;
25 use Psr\Log\LoggerInterface
;
26 use Psr\Log\NullLogger
;
27 use Wikimedia\Rdbms\DBConnectionError
;
28 use Wikimedia\WrappedString
;
31 * @defgroup ResourceLoader ResourceLoader
33 * For higher level documentation, see <https://www.mediawiki.org/wiki/ResourceLoader/Architecture>.
37 * ResourceLoader is a loading system for JavaScript and CSS resources.
39 * For higher level documentation, see <https://www.mediawiki.org/wiki/ResourceLoader/Architecture>.
41 * @ingroup ResourceLoader
44 class ResourceLoader
implements LoggerAwareInterface
{
47 /** @var MessageBlobStore */
50 /** @var LoggerInterface */
53 /** @var ResourceLoaderModule[] Map of (module name => ResourceLoaderModule) */
54 protected $modules = [];
55 /** @var array[] Map of (module name => associative info array) */
56 protected $moduleInfos = [];
58 * Associative array mapping framework ids to a list of names of test suite modules
59 * like [ 'qunit' => [ 'mediawiki.tests.qunit.suites', 'ext.foo.tests', ... ], ... ]
62 protected $testModuleNames = [];
63 /** @var string[] List of module names that contain QUnit test suites */
64 protected $testSuiteModuleNames = [];
66 /** @var array Map of (source => path); E.g. [ 'source-id' => 'http://.../load.php' ] */
67 protected $sources = [];
68 /** @var array Errors accumulated during current respond() call */
69 protected $errors = [];
70 /** @var string[] Extra HTTP response headers from modules loaded in makeModuleResponse() */
71 protected $extraHeaders = [];
74 protected static $debugMode = null;
77 const CACHE_VERSION
= 8;
79 /** @var string JavaScript / CSS pragma to disable minification. * */
80 const FILTER_NOMIN
= '/*@nomin*/';
83 * Load information stored in the database about modules.
85 * This method grabs modules dependencies from the database and updates modules
88 * This is not inside the module code because it is much faster to
89 * request all of the information at once than it is to have each module
90 * requests its own information. This sacrifice of modularity yields a substantial
91 * performance improvement.
93 * @param array $moduleNames List of module names to preload information for
94 * @param ResourceLoaderContext $context Context to load the information within
96 public function preloadModuleInfo( array $moduleNames, ResourceLoaderContext
$context ) {
97 if ( !$moduleNames ) {
98 // Or else Database*::select() will explode, plus it's cheaper!
101 $dbr = wfGetDB( DB_REPLICA
);
102 $lang = $context->getLanguage();
104 // Batched version of ResourceLoaderModule::getFileDependencies
105 $vary = ResourceLoaderModule
::getVary( $context );
106 $res = $dbr->select( 'module_deps', [ 'md_module', 'md_deps' ], [
107 'md_module' => $moduleNames,
112 // Prime in-object cache for file dependencies
113 $modulesWithDeps = [];
114 foreach ( $res as $row ) {
115 $module = $this->getModule( $row->md_module
);
117 $module->setFileDependencies( $context, ResourceLoaderModule
::expandRelativePaths(
118 json_decode( $row->md_deps
, true )
120 $modulesWithDeps[] = $row->md_module
;
123 // Register the absence of a dependency row too
124 foreach ( array_diff( $moduleNames, $modulesWithDeps ) as $name ) {
125 $module = $this->getModule( $name );
127 $this->getModule( $name )->setFileDependencies( $context, [] );
131 // Batched version of ResourceLoaderWikiModule::getTitleInfo
132 ResourceLoaderWikiModule
::preloadTitleInfo( $context, $dbr, $moduleNames );
134 // Prime in-object cache for message blobs for modules with messages
136 foreach ( $moduleNames as $name ) {
137 $module = $this->getModule( $name );
138 if ( $module && $module->getMessages() ) {
139 $modules[$name] = $module;
142 $store = $this->getMessageBlobStore();
143 $blobs = $store->getBlobs( $modules, $lang );
144 foreach ( $blobs as $name => $blob ) {
145 $modules[$name]->setMessageBlob( $blob, $lang );
150 * Run JavaScript or CSS data through a filter, caching the filtered result for future calls.
152 * Available filters are:
154 * - minify-js \see JavaScriptMinifier::minify
155 * - minify-css \see CSSMin::minify
157 * If $data is empty, only contains whitespace or the filter was unknown,
158 * $data is returned unmodified.
160 * @param string $filter Name of filter to run
161 * @param string $data Text to filter, such as JavaScript or CSS text
162 * @param array $options Keys:
163 * - (bool) cache: Whether to allow caching this data. Default: true.
164 * @return string Filtered data, or a comment containing an error message
166 public static function filter( $filter, $data, array $options = [] ) {
167 if ( strpos( $data, self
::FILTER_NOMIN
) !== false ) {
171 if ( isset( $options['cache'] ) && $options['cache'] === false ) {
172 return self
::applyFilter( $filter, $data );
175 $stats = MediaWikiServices
::getInstance()->getStatsdDataFactory();
176 $cache = ObjectCache
::getLocalServerInstance( CACHE_ANYTHING
);
178 $key = $cache->makeGlobalKey(
179 'resourceloader-filter',
185 $result = $cache->get( $key );
186 if ( $result === false ) {
187 $stats->increment( "resourceloader_cache.$filter.miss" );
188 $result = self
::applyFilter( $filter, $data );
189 $cache->set( $key, $result, 24 * 3600 );
191 $stats->increment( "resourceloader_cache.$filter.hit" );
193 if ( $result === null ) {
201 private static function applyFilter( $filter, $data ) {
202 $data = trim( $data );
205 $data = ( $filter === 'minify-css' )
206 ? CSSMin
::minify( $data )
207 : JavaScriptMinifier
::minify( $data );
208 } catch ( Exception
$e ) {
209 MWExceptionHandler
::logException( $e );
217 * Register core modules and runs registration hooks.
218 * @param Config|null $config
219 * @param LoggerInterface|null $logger [optional]
221 public function __construct( Config
$config = null, LoggerInterface
$logger = null ) {
222 $this->logger
= $logger ?
: new NullLogger();
225 wfDeprecated( __METHOD__
. ' without a Config instance', '1.34' );
226 $config = MediaWikiServices
::getInstance()->getMainConfig();
228 $this->config
= $config;
230 // Add 'local' source first
231 $this->addSource( 'local', $config->get( 'LoadScript' ) );
233 // Special module that always exists
234 $this->register( 'startup', [ 'class' => ResourceLoaderStartUpModule
::class ] );
236 $this->setMessageBlobStore( new MessageBlobStore( $this, $this->logger
) );
242 public function getConfig() {
243 return $this->config
;
248 * @param LoggerInterface $logger
250 public function setLogger( LoggerInterface
$logger ) {
251 $this->logger
= $logger;
256 * @return LoggerInterface
258 public function getLogger() {
259 return $this->logger
;
264 * @return MessageBlobStore
266 public function getMessageBlobStore() {
267 return $this->blobStore
;
272 * @param MessageBlobStore $blobStore
274 public function setMessageBlobStore( MessageBlobStore
$blobStore ) {
275 $this->blobStore
= $blobStore;
279 * Register a module with the ResourceLoader system.
281 * @param string|array[] $name Module name as a string or, array of module info arrays
283 * @param array|null $info Module info array. When using the first parameter to register
284 * multiple modules at once, this parameter is optional.
285 * @throws MWException If a duplicate module registration is attempted
286 * @throws MWException If a module name contains illegal characters (pipes or commas)
287 * @throws InvalidArgumentException If the module info is not an array
289 public function register( $name, $info = null ) {
290 $moduleSkinStyles = $this->config
->get( 'ResourceModuleSkinStyles' );
292 // Allow multiple modules to be registered in one call
293 $registrations = is_array( $name ) ?
$name : [ $name => $info ];
294 foreach ( $registrations as $name => $info ) {
295 // Warn on duplicate registrations
296 if ( isset( $this->moduleInfos
[$name] ) ) {
297 // A module has already been registered by this name
298 $this->logger
->warning(
299 'ResourceLoader duplicate registration warning. ' .
300 'Another module has already been registered as ' . $name
305 if ( !self
::isValidModuleName( $name ) ) {
306 throw new MWException( "ResourceLoader module name '$name' is invalid, "
307 . "see ResourceLoader::isValidModuleName()" );
309 if ( !is_array( $info ) ) {
310 throw new InvalidArgumentException(
311 'Invalid module info for "' . $name . '": expected array, got ' . gettype( $info )
316 $this->moduleInfos
[$name] = $info;
318 // Last-minute changes
319 // Apply custom skin-defined styles to existing modules.
320 if ( $this->isFileModule( $name ) ) {
321 foreach ( $moduleSkinStyles as $skinName => $skinStyles ) {
322 // If this module already defines skinStyles for this skin, ignore $wgResourceModuleSkinStyles.
323 if ( isset( $this->moduleInfos
[$name]['skinStyles'][$skinName] ) ) {
327 // If $name is preceded with a '+', the defined style files will be added to 'default'
328 // skinStyles, otherwise 'default' will be ignored as it normally would be.
329 if ( isset( $skinStyles[$name] ) ) {
330 $paths = (array)$skinStyles[$name];
332 } elseif ( isset( $skinStyles['+' . $name] ) ) {
333 $paths = (array)$skinStyles['+' . $name];
334 $styleFiles = isset( $this->moduleInfos
[$name]['skinStyles']['default'] ) ?
335 (array)$this->moduleInfos
[$name]['skinStyles']['default'] :
341 // Add new file paths, remapping them to refer to our directories and not use settings
342 // from the module we're modifying, which come from the base definition.
343 list( $localBasePath, $remoteBasePath ) =
344 ResourceLoaderFileModule
::extractBasePaths( $skinStyles );
346 foreach ( $paths as $path ) {
347 $styleFiles[] = new ResourceLoaderFilePath( $path, $localBasePath, $remoteBasePath );
350 $this->moduleInfos
[$name]['skinStyles'][$skinName] = $styleFiles;
357 * @internal For use by ServiceWiring only
358 * @codeCoverageIgnore
360 public function registerTestModules() {
363 if ( $this->config
->get( 'EnableJavaScriptTest' ) !== true ) {
364 throw new MWException( 'Attempt to register JavaScript test modules '
365 . 'but <code>$wgEnableJavaScriptTest</code> is false. '
366 . 'Edit your <code>LocalSettings.php</code> to enable it.' );
369 // This has a 'qunit' key for compat with the below hook.
370 $testModulesMeta = [ 'qunit' => [] ];
372 // Get test suites from extensions
373 // Avoid PHP 7.1 warning from passing $this by reference
375 Hooks
::run( 'ResourceLoaderTestModules', [ &$testModulesMeta, &$rl ] );
376 $extRegistry = ExtensionRegistry
::getInstance();
377 // In case of conflict, the deprecated hook has precedence.
378 $testModules = $testModulesMeta['qunit'] +
$extRegistry->getAttribute( 'QUnitTestModules' );
380 $testSuiteModuleNames = [];
381 foreach ( $testModules as $name => &$module ) {
382 // Turn any single-module dependency into an array
383 if ( isset( $module['dependencies'] ) && is_string( $module['dependencies'] ) ) {
384 $module['dependencies'] = [ $module['dependencies'] ];
387 // Ensure the testrunner loads before any test suites
388 $module['dependencies'][] = 'test.mediawiki.qunit.testrunner';
390 // Keep track of the test suites to load on SpecialJavaScriptTest
391 $testSuiteModuleNames[] = $name;
394 // Core test suites (their names have further precedence).
395 $testModules = ( include "$IP/tests/qunit/QUnitTestResources.php" ) +
$testModules;
396 $testSuiteModuleNames[] = 'test.mediawiki.qunit.suites';
398 $this->register( $testModules );
399 $this->testSuiteModuleNames
= $testSuiteModuleNames;
403 * Add a foreign source of modules.
405 * Source IDs are typically the same as the Wiki ID or database name (e.g. lowercase a-z).
407 * @param array|string $id Source ID (string), or [ id1 => loadUrl, id2 => loadUrl, ... ]
408 * @param string|array|null $loadUrl load.php url (string), or array with loadUrl key for
409 * backwards-compatibility.
410 * @throws MWException
412 public function addSource( $id, $loadUrl = null ) {
413 // Allow multiple sources to be registered in one call
414 if ( is_array( $id ) ) {
415 foreach ( $id as $key => $value ) {
416 $this->addSource( $key, $value );
421 // Disallow duplicates
422 if ( isset( $this->sources
[$id] ) ) {
423 throw new MWException(
424 'ResourceLoader duplicate source addition error. ' .
425 'Another source has already been registered as ' . $id
429 // Pre 1.24 backwards-compatibility
430 if ( is_array( $loadUrl ) ) {
431 if ( !isset( $loadUrl['loadScript'] ) ) {
432 throw new MWException(
433 __METHOD__
. ' was passed an array with no "loadScript" key.'
437 $loadUrl = $loadUrl['loadScript'];
440 $this->sources
[$id] = $loadUrl;
444 * Get a list of module names.
446 * @return array List of module names
448 public function getModuleNames() {
449 return array_keys( $this->moduleInfos
);
453 * Get a list of module names with QUnit test suites.
455 * @internal For use by SpecialJavaScriptTest only
457 * @codeCoverageIgnore
459 public function getTestSuiteModuleNames() {
460 return $this->testSuiteModuleNames
;
464 * Check whether a ResourceLoader module is registered
467 * @param string $name
470 public function isModuleRegistered( $name ) {
471 return isset( $this->moduleInfos
[$name] );
475 * Get the ResourceLoaderModule object for a given module name.
477 * If an array of module parameters exists but a ResourceLoaderModule object has not
478 * yet been instantiated, this method will instantiate and cache that object such that
479 * subsequent calls simply return the same object.
481 * @param string $name Module name
482 * @return ResourceLoaderModule|null If module has been registered, return a
483 * ResourceLoaderModule instance. Otherwise, return null.
485 public function getModule( $name ) {
486 if ( !isset( $this->modules
[$name] ) ) {
487 if ( !isset( $this->moduleInfos
[$name] ) ) {
491 // Construct the requested module object
492 $info = $this->moduleInfos
[$name];
493 if ( isset( $info['factory'] ) ) {
494 /** @var ResourceLoaderModule $object */
495 $object = call_user_func( $info['factory'], $info );
497 $class = $info['class'] ?? ResourceLoaderFileModule
::class;
498 /** @var ResourceLoaderModule $object */
499 $object = new $class( $info );
501 $object->setConfig( $this->getConfig() );
502 $object->setLogger( $this->logger
);
503 $object->setName( $name );
504 $this->modules
[$name] = $object;
507 return $this->modules
[$name];
511 * Whether the module is a ResourceLoaderFileModule (including subclasses).
513 * @param string $name Module name
516 protected function isFileModule( $name ) {
517 if ( !isset( $this->moduleInfos
[$name] ) ) {
520 $info = $this->moduleInfos
[$name];
521 return !isset( $info['factory'] ) && (
522 // The implied default for 'class' is ResourceLoaderFileModule
523 !isset( $info['class'] ) ||
525 $info['class'] === ResourceLoaderFileModule
::class ||
526 is_subclass_of( $info['class'], ResourceLoaderFileModule
::class )
531 * Get the list of sources.
533 * @return array Like [ id => load.php url, ... ]
535 public function getSources() {
536 return $this->sources
;
540 * Get the URL to the load.php endpoint for the given
541 * ResourceLoader source
544 * @param string $source
545 * @throws MWException On an invalid $source name
548 public function getLoadScript( $source ) {
549 if ( !isset( $this->sources
[$source] ) ) {
550 throw new MWException( "The $source source was never registered in ResourceLoader." );
552 return $this->sources
[$source];
556 * @internal For use by ResourceLoaderStartUpModule only.
558 const HASH_LENGTH
= 5;
561 * Create a hash for module versioning purposes.
563 * This hash is used in three ways:
565 * - To differentiate between the current version and a past version
566 * of a module by the same name.
568 * In the cache key of localStorage in the browser (mw.loader.store).
569 * This store keeps only one version of any given module. As long as the
570 * next version the client encounters has a different hash from the last
571 * version it saw, it will correctly discard it in favour of a network fetch.
573 * A browser may evict a site's storage container for any reason (e.g. when
574 * the user hasn't visited a site for some time, and/or when the device is
575 * low on storage space). Anecdotally it seems devices rarely keep unused
576 * storage beyond 2 weeks on mobile devices and 4 weeks on desktop.
577 * But, there is no hard limit or expiration on localStorage.
578 * ResourceLoader's Client also clears localStorage when the user changes
579 * their language preference or when they (temporarily) use Debug Mode.
581 * The only hard factors that reduce the range of possible versions are
582 * 1) the name and existence of a given module, and
583 * 2) the TTL for mw.loader.store, and
584 * 3) the `$wgResourceLoaderStorageVersion` configuration variable.
586 * - To identify a batch response of modules from load.php in an HTTP cache.
588 * When fetching modules in a batch from load.php, a combined hash
589 * is created by the JS code, and appended as query parameter.
591 * In cache proxies (e.g. Varnish, Nginx) and in the browser's HTTP cache,
592 * these urls are used to identify other previously cached responses.
593 * The range of possible versions a given version has to be unique amongst
594 * is determined by the maximum duration each response is stored for, which
595 * is controlled by `$wgResourceLoaderMaxage['versioned']`.
597 * - To detect race conditions between multiple web servers in a MediaWiki
598 * deployment of which some have the newer version and some still the older
601 * An HTTP request from a browser for the Startup manifest may be responded
602 * to by a server with the newer version. The browser may then use that to
603 * request a given module, which may then be responded to by a server with
604 * the older version. To avoid caching this for too long (which would pollute
605 * all other users without repairing itself), the combined hash that the JS
606 * client adds to the url is verified by the server (in ::sendResponseHeaders).
607 * If they don't match, we instruct cache proxies and clients to not cache
608 * this response as long as they normally would. This is also the reason
609 * that the algorithm used here in PHP must match the one used in JS.
611 * The fnv132 digest creates a 32-bit integer, which goes upto 4 Giga and
612 * needs up to 7 chars in base 36.
613 * Within 7 characters, base 36 can count up to 78,364,164,096 (78 Giga),
614 * (but with fnv132 we'd use very little of this range, mostly padding).
615 * Within 6 characters, base 36 can count up to 2,176,782,336 (2 Giga).
616 * Within 5 characters, base 36 can count up to 60,466,176 (60 Mega).
619 * @param string $value
620 * @return string Hash
622 public static function makeHash( $value ) {
623 $hash = hash( 'fnv132', $value );
624 // The base_convert will pad it (if too short),
625 // then substr() will trim it (if too long).
627 Wikimedia\base_convert
( $hash, 16, 36, self
::HASH_LENGTH
),
634 * Add an error to the 'errors' array and log it.
636 * @private For internal use by ResourceLoader and ResourceLoaderStartUpModule.
638 * @param Exception $e
640 * @param array $context
642 public function outputErrorAndLog( Exception
$e, $msg, array $context = [] ) {
643 MWExceptionHandler
::logException( $e );
644 $this->logger
->warning(
646 $context +
[ 'exception' => $e ]
648 $this->errors
[] = self
::formatExceptionNoComment( $e );
652 * Helper method to get and combine versions of multiple modules.
655 * @param ResourceLoaderContext $context
656 * @param string[] $moduleNames List of known module names
657 * @return string Hash
659 public function getCombinedVersion( ResourceLoaderContext
$context, array $moduleNames ) {
660 if ( !$moduleNames ) {
663 $hashes = array_map( function ( $module ) use ( $context ) {
665 return $this->getModule( $module )->getVersionHash( $context );
666 } catch ( Exception
$e ) {
667 // If modules fail to compute a version, don't fail the request (T152266)
668 // and still compute versions of other modules.
669 $this->outputErrorAndLog( $e,
670 'Calculating version for "{module}" failed: {exception}',
678 return self
::makeHash( implode( '', $hashes ) );
682 * Get the expected value of the 'version' query parameter.
684 * This is used by respond() to set a short Cache-Control header for requests with
685 * information newer than the current server has. This avoids pollution of edge caches.
686 * Typically during deployment. (T117587)
688 * This MUST match return value of `mw.loader#getCombinedVersion()` client-side.
691 * @param ResourceLoaderContext $context
692 * @return string Hash
694 public function makeVersionQuery( ResourceLoaderContext
$context ) {
695 // As of MediaWiki 1.28, the server and client use the same algorithm for combining
696 // version hashes. There is no technical reason for this to be same, and for years the
697 // implementations differed. If getCombinedVersion in PHP (used for StartupModule and
698 // E-Tag headers) differs in the future from getCombinedVersion in JS (used for 'version'
699 // query parameter), then this method must continue to match the JS one.
701 foreach ( $context->getModules() as $name ) {
702 if ( !$this->getModule( $name ) ) {
703 // If a versioned request contains a missing module, the version is a mismatch
704 // as the client considered a module (and version) we don't have.
707 $moduleNames[] = $name;
709 return $this->getCombinedVersion( $context, $moduleNames );
713 * Output a response to a load request, including the content-type header.
715 * @param ResourceLoaderContext $context Context in which a response should be formed
717 public function respond( ResourceLoaderContext
$context ) {
718 // Buffer output to catch warnings. Normally we'd use ob_clean() on the
719 // top-level output buffer to clear warnings, but that breaks when ob_gzhandler
720 // is used: ob_clean() will clear the GZIP header in that case and it won't come
721 // back for subsequent output, resulting in invalid GZIP. So we have to wrap
722 // the whole thing in our own output buffer to be sure the active buffer
723 // doesn't use ob_gzhandler.
724 // See https://bugs.php.net/bug.php?id=36514
727 $this->measureResponseTime( RequestContext
::getMain()->getTiming() );
729 // Find out which modules are missing and instantiate the others
732 foreach ( $context->getModules() as $name ) {
733 $module = $this->getModule( $name );
735 // Do not allow private modules to be loaded from the web.
736 // This is a security issue, see T36907.
737 if ( $module->getGroup() === 'private' ) {
738 // Not a serious error, just means something is trying to access it (T101806)
739 $this->logger
->debug( "Request for private module '$name' denied" );
740 $this->errors
[] = "Cannot build private module \"$name\"";
743 $modules[$name] = $module;
750 // Preload for getCombinedVersion() and for batch makeModuleResponse()
751 $this->preloadModuleInfo( array_keys( $modules ), $context );
752 } catch ( Exception
$e ) {
753 $this->outputErrorAndLog( $e, 'Preloading module info failed: {exception}' );
756 // Combine versions to propagate cache invalidation
759 $versionHash = $this->getCombinedVersion( $context, array_keys( $modules ) );
760 } catch ( Exception
$e ) {
761 $this->outputErrorAndLog( $e, 'Calculating version hash failed: {exception}' );
764 // See RFC 2616 § 3.11 Entity Tags
765 // https://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.11
766 $etag = 'W/"' . $versionHash . '"';
768 // Try the client-side cache first
769 if ( $this->tryRespondNotModified( $context, $etag ) ) {
770 return; // output handled (buffers cleared)
773 // Use file cache if enabled and available...
774 if ( $this->config
->get( 'UseFileCache' ) ) {
775 $fileCache = ResourceFileCache
::newFromContext( $context );
776 if ( $this->tryRespondFromFileCache( $fileCache, $context, $etag ) ) {
777 return; // output handled
783 // Generate a response
784 $response = $this->makeModuleResponse( $context, $modules, $missing );
786 // Capture any PHP warnings from the output buffer and append them to the
787 // error list if we're in debug mode.
788 if ( $context->getDebug() ) {
789 $warnings = ob_get_contents();
790 if ( strlen( $warnings ) ) {
791 $this->errors
[] = $warnings;
795 // Consider saving the response to file cache (unless there are errors).
799 ResourceFileCache
::useFileCache( $context )
801 if ( $fileCache->isCacheWorthy() ) {
802 // There were enough hits, save the response to the cache
803 $fileCache->saveText( $response );
805 $fileCache->incrMissesRecent( $context->getRequest() );
809 $this->sendResponseHeaders( $context, $etag, (bool)$this->errors
, $this->extraHeaders
);
811 // Remove the output buffer and output the response
814 if ( $context->getImageObj() && $this->errors
) {
815 // We can't show both the error messages and the response when it's an image.
816 $response = implode( "\n\n", $this->errors
);
817 } elseif ( $this->errors
) {
818 $errorText = implode( "\n\n", $this->errors
);
819 $errorResponse = self
::makeComment( $errorText );
820 if ( $context->shouldIncludeScripts() ) {
821 $errorResponse .= 'if (window.console && console.error) { console.error('
822 . self
::encodeJsonForScript( $errorText )
826 // Prepend error info to the response
827 $response = $errorResponse . $response;
834 protected function measureResponseTime( Timing
$timing ) {
835 DeferredUpdates
::addCallableUpdate( function () use ( $timing ) {
836 $measure = $timing->measure( 'responseTime', 'requestStart', 'requestShutdown' );
837 if ( $measure !== false ) {
838 $stats = MediaWikiServices
::getInstance()->getStatsdDataFactory();
839 $stats->timing( 'resourceloader.responseTime', $measure['duration'] * 1000 );
845 * Send main response headers to the client.
847 * Deals with Content-Type, CORS (for stylesheets), and caching.
849 * @param ResourceLoaderContext $context
850 * @param string $etag ETag header value
851 * @param bool $errors Whether there are errors in the response
852 * @param string[] $extra Array of extra HTTP response headers
855 protected function sendResponseHeaders(
856 ResourceLoaderContext
$context, $etag, $errors, array $extra = []
858 \MediaWiki\HeaderCallback
::warnIfHeadersSent();
859 $rlMaxage = $this->config
->get( 'ResourceLoaderMaxage' );
860 // Use a short cache expiry so that updates propagate to clients quickly, if:
861 // - No version specified (shared resources, e.g. stylesheets)
862 // - There were errors (recover quickly)
863 // - Version mismatch (T117587, T47877)
864 if ( is_null( $context->getVersion() )
866 ||
$context->getVersion() !== $this->makeVersionQuery( $context )
868 $maxage = $rlMaxage['unversioned']['client'];
869 $smaxage = $rlMaxage['unversioned']['server'];
870 // If a version was specified we can use a longer expiry time since changing
871 // version numbers causes cache misses
873 $maxage = $rlMaxage['versioned']['client'];
874 $smaxage = $rlMaxage['versioned']['server'];
876 if ( $context->getImageObj() ) {
877 // Output different headers if we're outputting textual errors.
879 header( 'Content-Type: text/plain; charset=utf-8' );
881 $context->getImageObj()->sendResponseHeaders( $context );
883 } elseif ( $context->getOnly() === 'styles' ) {
884 header( 'Content-Type: text/css; charset=utf-8' );
885 header( 'Access-Control-Allow-Origin: *' );
887 header( 'Content-Type: text/javascript; charset=utf-8' );
889 // See RFC 2616 § 14.19 ETag
890 // https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.19
891 header( 'ETag: ' . $etag );
892 if ( $context->getDebug() ) {
893 // Do not cache debug responses
894 header( 'Cache-Control: private, no-cache, must-revalidate' );
895 header( 'Pragma: no-cache' );
897 header( "Cache-Control: public, max-age=$maxage, s-maxage=$smaxage" );
898 $exp = min( $maxage, $smaxage );
899 header( 'Expires: ' . wfTimestamp( TS_RFC2822
, $exp +
time() ) );
901 foreach ( $extra as $header ) {
907 * Respond with HTTP 304 Not Modified if appropiate.
909 * If there's an If-None-Match header, respond with a 304 appropriately
910 * and clear out the output buffer. If the client cache is too old then do nothing.
912 * @param ResourceLoaderContext $context
913 * @param string $etag ETag header value
914 * @return bool True if HTTP 304 was sent and output handled
916 protected function tryRespondNotModified( ResourceLoaderContext
$context, $etag ) {
917 // See RFC 2616 § 14.26 If-None-Match
918 // https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.26
919 $clientKeys = $context->getRequest()->getHeader( 'If-None-Match', WebRequest
::GETHEADER_LIST
);
920 // Never send 304s in debug mode
921 if ( $clientKeys !== false && !$context->getDebug() && in_array( $etag, $clientKeys ) ) {
922 // There's another bug in ob_gzhandler (see also the comment at
923 // the top of this function) that causes it to gzip even empty
924 // responses, meaning it's impossible to produce a truly empty
925 // response (because the gzip header is always there). This is
926 // a problem because 304 responses have to be completely empty
927 // per the HTTP spec, and Firefox behaves buggily when they're not.
928 // See also https://bugs.php.net/bug.php?id=51579
929 // To work around this, we tear down all output buffering before
931 wfResetOutputBuffers( /* $resetGzipEncoding = */ true );
933 HttpStatus
::header( 304 );
935 $this->sendResponseHeaders( $context, $etag, false );
942 * Send out code for a response from file cache if possible.
944 * @param ResourceFileCache $fileCache Cache object for this request URL
945 * @param ResourceLoaderContext $context Context in which to generate a response
946 * @param string $etag ETag header value
947 * @return bool If this found a cache file and handled the response
949 protected function tryRespondFromFileCache(
950 ResourceFileCache
$fileCache,
951 ResourceLoaderContext
$context,
954 $rlMaxage = $this->config
->get( 'ResourceLoaderMaxage' );
955 // Buffer output to catch warnings.
957 // Get the maximum age the cache can be
958 $maxage = is_null( $context->getVersion() )
959 ?
$rlMaxage['unversioned']['server']
960 : $rlMaxage['versioned']['server'];
961 // Minimum timestamp the cache file must have
962 $good = $fileCache->isCacheGood( wfTimestamp( TS_MW
, time() - $maxage ) );
964 try { // RL always hits the DB on file cache miss...
965 wfGetDB( DB_REPLICA
);
966 } catch ( DBConnectionError
$e ) { // ...check if we need to fallback to cache
967 $good = $fileCache->isCacheGood(); // cache existence check
971 $ts = $fileCache->cacheTimestamp();
972 // Send content type and cache headers
973 $this->sendResponseHeaders( $context, $etag, false );
974 $response = $fileCache->fetchText();
975 // Capture any PHP warnings from the output buffer and append them to the
976 // response in a comment if we're in debug mode.
977 if ( $context->getDebug() ) {
978 $warnings = ob_get_contents();
979 if ( strlen( $warnings ) ) {
980 $response = self
::makeComment( $warnings ) . $response;
983 // Remove the output buffer and output the response
985 echo $response . "\n/* Cached {$ts} */";
986 return true; // cache hit
991 return false; // cache miss
995 * Generate a CSS or JS comment block.
997 * Only use this for public data, not error message details.
999 * @param string $text
1002 public static function makeComment( $text ) {
1003 $encText = str_replace( '*/', '* /', $text );
1004 return "/*\n$encText\n*/\n";
1008 * Handle exception display.
1010 * @param Exception $e Exception to be shown to the user
1011 * @return string Sanitized text in a CSS/JS comment that can be returned to the user
1013 public static function formatException( $e ) {
1014 return self
::makeComment( self
::formatExceptionNoComment( $e ) );
1018 * Handle exception display.
1021 * @param Exception $e Exception to be shown to the user
1022 * @return string Sanitized text that can be returned to the user
1024 protected static function formatExceptionNoComment( $e ) {
1025 global $wgShowExceptionDetails;
1027 if ( !$wgShowExceptionDetails ) {
1028 return MWExceptionHandler
::getPublicLogMessage( $e );
1031 return MWExceptionHandler
::getLogMessage( $e ) .
1033 MWExceptionHandler
::getRedactedTraceAsString( $e );
1037 * Generate code for a response.
1039 * Calling this method also populates the `errors` and `headers` members,
1040 * later used by respond().
1042 * @param ResourceLoaderContext $context Context in which to generate a response
1043 * @param ResourceLoaderModule[] $modules List of module objects keyed by module name
1044 * @param string[] $missing List of requested module names that are unregistered (optional)
1045 * @return string Response data
1047 public function makeModuleResponse( ResourceLoaderContext
$context,
1048 array $modules, array $missing = []
1053 if ( $modules === [] && $missing === [] ) {
1055 /* This file is the Web entry point for MediaWiki's ResourceLoader:
1056 <https://www.mediawiki.org/wiki/ResourceLoader>. In this request,
1057 no modules were requested. Max made me put this here. */
1061 $image = $context->getImageObj();
1063 $data = $image->getImageData( $context );
1064 if ( $data === false ) {
1066 $this->errors
[] = 'Image generation failed';
1071 foreach ( $missing as $name ) {
1072 $states[$name] = 'missing';
1075 $filter = $context->getOnly() === 'styles' ?
'minify-css' : 'minify-js';
1077 foreach ( $modules as $name => $module ) {
1079 $content = $module->getModuleContent( $context );
1080 $implementKey = $name . '@' . $module->getVersionHash( $context );
1083 if ( isset( $content['headers'] ) ) {
1084 $this->extraHeaders
= array_merge( $this->extraHeaders
, $content['headers'] );
1088 switch ( $context->getOnly() ) {
1090 $scripts = $content['scripts'];
1091 if ( is_string( $scripts ) ) {
1092 // Load scripts raw...
1093 $strContent = $scripts;
1094 } elseif ( is_array( $scripts ) ) {
1095 // ...except when $scripts is an array of URLs or an associative array
1096 $strContent = self
::makeLoaderImplementScript( $implementKey, $scripts, [], [], [] );
1100 $styles = $content['styles'];
1101 // We no longer separate into media, they are all combined now with
1102 // custom media type groups into @media .. {} sections as part of the css string.
1103 // Module returns either an empty array or a numerical array with css strings.
1104 $strContent = isset( $styles['css'] ) ?
implode( '', $styles['css'] ) : '';
1107 $scripts = $content['scripts'] ??
'';
1108 if ( is_string( $scripts ) ) {
1109 if ( $name === 'site' ||
$name === 'user' ) {
1110 // Legacy scripts that run in the global scope without a closure.
1111 // mw.loader.implement will use globalEval if scripts is a string.
1112 // Minify manually here, because general response minification is
1113 // not effective due it being a string literal, not a function.
1114 if ( !$context->getDebug() ) {
1115 $scripts = self
::filter( 'minify-js', $scripts ); // T107377
1118 $scripts = new XmlJsCode( $scripts );
1121 $strContent = self
::makeLoaderImplementScript(
1124 $content['styles'] ??
[],
1125 isset( $content['messagesBlob'] ) ?
new XmlJsCode( $content['messagesBlob'] ) : [],
1126 $content['templates'] ??
[]
1131 if ( !$context->getDebug() ) {
1132 $strContent = self
::filter( $filter, $strContent );
1134 // In debug mode, separate each response by a new line.
1135 // For example, between 'mw.loader.implement();' statements.
1136 $strContent = $this->ensureNewline( $strContent );
1139 if ( $context->getOnly() === 'scripts' ) {
1140 // Use a linebreak between module scripts (T162719)
1141 $out .= $this->ensureNewline( $strContent );
1143 $out .= $strContent;
1146 } catch ( Exception
$e ) {
1147 $this->outputErrorAndLog( $e, 'Generating module package failed: {exception}' );
1149 // Respond to client with error-state instead of module implementation
1150 $states[$name] = 'error';
1151 unset( $modules[$name] );
1155 // Update module states
1156 if ( $context->shouldIncludeScripts() && !$context->getRaw() ) {
1157 if ( $modules && $context->getOnly() === 'scripts' ) {
1158 // Set the state of modules loaded as only scripts to ready as
1159 // they don't have an mw.loader.implement wrapper that sets the state
1160 foreach ( $modules as $name => $module ) {
1161 $states[$name] = 'ready';
1165 // Set the state of modules we didn't respond to with mw.loader.implement
1167 $stateScript = self
::makeLoaderStateScript( $states );
1168 if ( !$context->getDebug() ) {
1169 $stateScript = self
::filter( 'minify-js', $stateScript );
1171 // Use a linebreak between module script and state script (T162719)
1172 $out = $this->ensureNewline( $out ) . $stateScript;
1174 } elseif ( $states ) {
1175 $this->errors
[] = 'Problematic modules: '
1176 . self
::encodeJsonForScript( $states );
1183 * Ensure the string is either empty or ends in a line break
1184 * @param string $str
1187 private function ensureNewline( $str ) {
1188 $end = substr( $str, -1 );
1189 if ( $end === false ||
$end === '' ||
$end === "\n" ) {
1196 * Get names of modules that use a certain message.
1198 * @param string $messageKey
1199 * @return array List of module names
1201 public function getModulesByMessage( $messageKey ) {
1203 foreach ( $this->getModuleNames() as $moduleName ) {
1204 $module = $this->getModule( $moduleName );
1205 if ( in_array( $messageKey, $module->getMessages() ) ) {
1206 $moduleNames[] = $moduleName;
1209 return $moduleNames;
1213 * Return JS code that calls mw.loader.implement with given module properties.
1215 * @param string $name Module name or implement key (format "`[name]@[version]`")
1216 * @param XmlJsCode|array|string $scripts Code as XmlJsCode (to be wrapped in a closure),
1217 * list of URLs to JavaScript files, string of JavaScript for `$.globalEval`, or array with
1218 * 'files' and 'main' properties (see ResourceLoaderModule::getScript())
1219 * @param mixed $styles Array of CSS strings keyed by media type, or an array of lists of URLs
1220 * to CSS files keyed by media type
1221 * @param mixed $messages List of messages associated with this module. May either be an
1222 * associative array mapping message key to value, or a JSON-encoded message blob containing
1223 * the same data, wrapped in an XmlJsCode object.
1224 * @param array $templates Keys are name of templates and values are the source of
1226 * @throws MWException
1227 * @return string JavaScript code
1229 protected static function makeLoaderImplementScript(
1230 $name, $scripts, $styles, $messages, $templates
1232 if ( $scripts instanceof XmlJsCode
) {
1233 if ( $scripts->value
=== '' ) {
1235 } elseif ( self
::inDebugMode() ) {
1236 $scripts = new XmlJsCode( "function ( $, jQuery, require, module ) {\n{$scripts->value}\n}" );
1238 $scripts = new XmlJsCode( 'function($,jQuery,require,module){' . $scripts->value
. '}' );
1240 } elseif ( is_array( $scripts ) && isset( $scripts['files'] ) ) {
1241 $files = $scripts['files'];
1242 foreach ( $files as $path => &$file ) {
1243 // $file is changed (by reference) from a descriptor array to the content of the file
1244 // All of these essentially do $file = $file['content'];, some just have wrapping around it
1245 if ( $file['type'] === 'script' ) {
1246 // Multi-file modules only get two parameters ($ and jQuery are being phased out)
1247 if ( self
::inDebugMode() ) {
1248 $file = new XmlJsCode( "function ( require, module ) {\n{$file['content']}\n}" );
1250 $file = new XmlJsCode( 'function(require,module){' . $file['content'] . '}' );
1253 $file = $file['content'];
1256 $scripts = XmlJsCode
::encodeObject( [
1257 'main' => $scripts['main'],
1258 'files' => XmlJsCode
::encodeObject( $files, self
::inDebugMode() )
1259 ], self
::inDebugMode() );
1260 } elseif ( !is_string( $scripts ) && !is_array( $scripts ) ) {
1261 throw new MWException( 'Invalid scripts error. Array of URLs or string of code expected.' );
1264 // mw.loader.implement requires 'styles', 'messages' and 'templates' to be objects (not
1265 // arrays). json_encode considers empty arrays to be numerical and outputs "[]" instead
1266 // of "{}". Force them to objects.
1274 self
::trimArray( $module );
1276 return Xml
::encodeJsCall( 'mw.loader.implement', $module, self
::inDebugMode() );
1280 * Returns JS code which, when called, will register a given list of messages.
1282 * @param mixed $messages Associative array mapping message key to value.
1283 * @return string JavaScript code
1285 public static function makeMessageSetScript( $messages ) {
1286 return 'mw.messages.set('
1287 . self
::encodeJsonForScript( (object)$messages )
1292 * Combines an associative array mapping media type to CSS into a
1293 * single stylesheet with "@media" blocks.
1295 * @param array $stylePairs Array keyed by media type containing (arrays of) CSS strings
1298 public static function makeCombinedStyles( array $stylePairs ) {
1300 foreach ( $stylePairs as $media => $styles ) {
1301 // ResourceLoaderFileModule::getStyle can return the styles
1302 // as a string or an array of strings. This is to allow separation in
1304 $styles = (array)$styles;
1305 foreach ( $styles as $style ) {
1306 $style = trim( $style );
1307 // Don't output an empty "@media print { }" block (T42498)
1308 if ( $style !== '' ) {
1309 // Transform the media type based on request params and config
1310 // The way that this relies on $wgRequest to propagate request params is slightly evil
1311 $media = OutputPage
::transformCssMedia( $media );
1313 if ( $media === '' ||
$media == 'all' ) {
1315 } elseif ( is_string( $media ) ) {
1316 $out[] = "@media $media {\n" . str_replace( "\n", "\n\t", "\t" . $style ) . "}";
1326 * Wrapper around json_encode that avoids needless escapes,
1327 * and pretty-prints in debug mode.
1331 * @param mixed $data
1332 * @return string|false JSON string, false on error
1334 public static function encodeJsonForScript( $data ) {
1335 // Keep output as small as possible by disabling needless escape modes
1336 // that PHP uses by default.
1337 // However, while most module scripts are only served on HTTP responses
1338 // for JavaScript, some modules can also be embedded in the HTML as inline
1339 // scripts. This, and the fact that we sometimes need to export strings
1340 // containing user-generated content and labels that may genuinely contain
1341 // a sequences like "</script>", we need to encode either '/' or '<'.
1342 // By default PHP escapes '/'. Let's escape '<' instead which is less common
1343 // and allows URLs to mostly remain readable.
1344 $jsonFlags = JSON_UNESCAPED_SLASHES |
1345 JSON_UNESCAPED_UNICODE |
1348 if ( self
::inDebugMode() ) {
1349 $jsonFlags |
= JSON_PRETTY_PRINT
;
1351 return json_encode( $data, $jsonFlags );
1355 * Returns a JS call to mw.loader.state, which sets the state of one
1356 * ore more modules to a given value. Has two calling conventions:
1358 * - ResourceLoader::makeLoaderStateScript( $name, $state ):
1359 * Set the state of a single module called $name to $state
1361 * - ResourceLoader::makeLoaderStateScript( [ $name => $state, ... ] ):
1362 * Set the state of modules with the given names to the given states
1364 * @param array|string $states
1365 * @param string|null $state
1366 * @return string JavaScript code
1368 public static function makeLoaderStateScript( $states, $state = null ) {
1369 if ( !is_array( $states ) ) {
1370 $states = [ $states => $state ];
1372 return 'mw.loader.state('
1373 . self
::encodeJsonForScript( $states )
1377 private static function isEmptyObject( stdClass
$obj ) {
1378 foreach ( $obj as $key => $value ) {
1385 * Remove empty values from the end of an array.
1387 * Values considered empty:
1391 * - new XmlJsCode( '{}' )
1392 * - new stdClass() // (object) []
1394 * @param array $array
1396 private static function trimArray( array &$array ) {
1397 $i = count( $array );
1399 if ( $array[$i] === null
1400 ||
$array[$i] === []
1401 ||
( $array[$i] instanceof XmlJsCode
&& $array[$i]->value
=== '{}' )
1402 ||
( $array[$i] instanceof stdClass
&& self
::isEmptyObject( $array[$i] ) )
1404 unset( $array[$i] );
1412 * Returns JS code which calls mw.loader.register with the given
1418 * ResourceLoader::makeLoaderRegisterScript( [
1419 * [ $name1, $version1, $dependencies1, $group1, $source1, $skip1 ],
1420 * [ $name2, $version2, $dependencies1, $group2, $source2, $skip2 ],
1427 * @param array $modules Array of module registration arrays, each containing
1428 * - string: module name
1429 * - string: module version
1430 * - array|null: List of dependencies (optional)
1431 * - string|null: Module group (optional)
1432 * - string|null: Name of foreign module source, or 'local' (optional)
1433 * - string|null: Script body of a skip function (optional)
1434 * @return string JavaScript code
1436 public static function makeLoaderRegisterScript( array $modules ) {
1437 // Optimisation: Transform dependency names into indexes when possible
1438 // to produce smaller output. They are expanded by mw.loader.register on
1439 // the other end using resolveIndexedDependencies().
1441 foreach ( $modules as $i => &$module ) {
1442 // Build module name index
1443 $index[$module[0]] = $i;
1445 foreach ( $modules as &$module ) {
1446 if ( isset( $module[2] ) ) {
1447 foreach ( $module[2] as &$dependency ) {
1448 if ( isset( $index[$dependency] ) ) {
1449 // Replace module name in dependency list with index
1450 $dependency = $index[$dependency];
1456 array_walk( $modules, [ self
::class, 'trimArray' ] );
1458 return 'mw.loader.register('
1459 . self
::encodeJsonForScript( $modules )
1464 * Returns JS code which calls mw.loader.addSource() with the given
1465 * parameters. Has two calling conventions:
1467 * - ResourceLoader::makeLoaderSourcesScript( $id, $properties ):
1468 * Register a single source
1470 * - ResourceLoader::makeLoaderSourcesScript( [ $id1 => $loadUrl, $id2 => $loadUrl, ... ] );
1471 * Register sources with the given IDs and properties.
1473 * @param string|array $sources Source ID
1474 * @param string|null $loadUrl load.php url
1475 * @return string JavaScript code
1477 public static function makeLoaderSourcesScript( $sources, $loadUrl = null ) {
1478 if ( !is_array( $sources ) ) {
1479 $sources = [ $sources => $loadUrl ];
1481 return 'mw.loader.addSource('
1482 . self
::encodeJsonForScript( $sources )
1487 * Wraps JavaScript code to run after the startup module.
1489 * @param string $script JavaScript code
1490 * @return string JavaScript code
1492 public static function makeLoaderConditionalScript( $script ) {
1493 // Adds a function to lazy-created RLQ
1494 return '(RLQ=window.RLQ||[]).push(function(){' .
1495 trim( $script ) . '});';
1499 * Wraps JavaScript code to run after a required module.
1502 * @param string|string[] $modules Module name(s)
1503 * @param string $script JavaScript code
1504 * @return string JavaScript code
1506 public static function makeInlineCodeWithModule( $modules, $script ) {
1507 // Adds an array to lazy-created RLQ
1508 return '(RLQ=window.RLQ||[]).push(['
1509 . self
::encodeJsonForScript( $modules ) . ','
1510 . 'function(){' . trim( $script ) . '}'
1515 * Returns an HTML script tag that runs given JS code after startup and base modules.
1517 * The code will be wrapped in a closure, and it will be executed by ResourceLoader's
1518 * startup module if the client has adequate support for MediaWiki JavaScript code.
1520 * @param string $script JavaScript code
1521 * @param string|null $nonce [optional] Content-Security-Policy nonce
1522 * (from OutputPage::getCSPNonce)
1523 * @return string|WrappedString HTML
1525 public static function makeInlineScript( $script, $nonce = null ) {
1526 $js = self
::makeLoaderConditionalScript( $script );
1528 if ( $nonce === null ) {
1529 wfWarn( __METHOD__
. " did not get nonce. Will break CSP" );
1530 } elseif ( $nonce !== false ) {
1531 // If it was false, CSP is disabled, so no nonce attribute.
1532 // Nonce should be only base64 characters, so should be safe,
1533 // but better to be safely escaped than sorry.
1534 $escNonce = ' nonce="' . htmlspecialchars( $nonce ) . '"';
1537 return new WrappedString(
1538 Html
::inlineScript( $js, $nonce ),
1539 "<script$escNonce>(RLQ=window.RLQ||[]).push(function(){",
1545 * Returns JS code which will set the MediaWiki configuration array to
1548 * @param array $configuration List of configuration values keyed by variable name
1549 * @return string JavaScript code
1552 public static function makeConfigSetScript( array $configuration ) {
1553 $json = self
::encodeJsonForScript( $configuration );
1554 if ( $json === false ) {
1556 'JSON serialization of config data failed. ' .
1557 'This usually means the config data is not valid UTF-8.'
1559 MWExceptionHandler
::logException( $e );
1560 return 'mw.log.error(' . self
::encodeJsonForScript( $e->__toString() ) . ');';
1562 return "mw.config.set($json);";
1566 * Convert an array of module names to a packed query string.
1568 * For example, `[ 'foo.bar', 'foo.baz', 'bar.baz', 'bar.quux' ]`
1569 * becomes `'foo.bar,baz|bar.baz,quux'`.
1571 * This process is reversed by ResourceLoader::expandModuleNames().
1572 * See also mw.loader#buildModulesString() which is a port of this, used
1573 * on the client-side.
1575 * @param array $modules List of module names (strings)
1576 * @return string Packed query string
1578 public static function makePackedModulesString( $modules ) {
1579 $moduleMap = []; // [ prefix => [ suffixes ] ]
1580 foreach ( $modules as $module ) {
1581 $pos = strrpos( $module, '.' );
1582 $prefix = $pos === false ?
'' : substr( $module, 0, $pos );
1583 $suffix = $pos === false ?
$module : substr( $module, $pos +
1 );
1584 $moduleMap[$prefix][] = $suffix;
1588 foreach ( $moduleMap as $prefix => $suffixes ) {
1589 $p = $prefix === '' ?
'' : $prefix . '.';
1590 $arr[] = $p . implode( ',', $suffixes );
1592 return implode( '|', $arr );
1596 * Expand a string of the form `jquery.foo,bar|jquery.ui.baz,quux` to
1597 * an array of module names like `[ 'jquery.foo', 'jquery.bar',
1598 * 'jquery.ui.baz', 'jquery.ui.quux' ]`.
1600 * This process is reversed by ResourceLoader::makePackedModulesString().
1603 * @param string $modules Packed module name list
1604 * @return array Array of module names
1606 public static function expandModuleNames( $modules ) {
1608 $exploded = explode( '|', $modules );
1609 foreach ( $exploded as $group ) {
1610 if ( strpos( $group, ',' ) === false ) {
1611 // This is not a set of modules in foo.bar,baz notation
1612 // but a single module
1615 // This is a set of modules in foo.bar,baz notation
1616 $pos = strrpos( $group, '.' );
1617 if ( $pos === false ) {
1618 // Prefixless modules, i.e. without dots
1619 $retval = array_merge( $retval, explode( ',', $group ) );
1621 // We have a prefix and a bunch of suffixes
1622 $prefix = substr( $group, 0, $pos ); // 'foo'
1623 $suffixes = explode( ',', substr( $group, $pos +
1 ) ); // [ 'bar', 'baz' ]
1624 foreach ( $suffixes as $suffix ) {
1625 $retval[] = "$prefix.$suffix";
1634 * Determine whether debug mode was requested
1635 * Order of priority is 1) request param, 2) cookie, 3) $wg setting
1638 public static function inDebugMode() {
1639 if ( self
::$debugMode === null ) {
1640 global $wgRequest, $wgResourceLoaderDebug;
1641 self
::$debugMode = $wgRequest->getFuzzyBool( 'debug',
1642 $wgRequest->getCookie( 'resourceLoaderDebug', '', $wgResourceLoaderDebug )
1645 return self
::$debugMode;
1649 * Reset static members used for caching.
1651 * Global state and $wgRequest are evil, but we're using it right
1652 * now and sometimes we need to be able to force ResourceLoader to
1653 * re-evaluate the context because it has changed (e.g. in the test suite).
1655 * @internal For use by unit tests
1656 * @codeCoverageIgnore
1658 public static function clearCache() {
1659 self
::$debugMode = null;
1663 * Build a load.php URL
1666 * @param string $source Name of the ResourceLoader source
1667 * @param ResourceLoaderContext $context
1668 * @param array $extraQuery
1669 * @return string URL to load.php. May be protocol-relative if $wgLoadScript is, too.
1671 public function createLoaderURL( $source, ResourceLoaderContext
$context,
1674 $query = self
::createLoaderQuery( $context, $extraQuery );
1675 $script = $this->getLoadScript( $source );
1677 return wfAppendQuery( $script, $query );
1681 * Helper for createLoaderURL()
1684 * @see makeLoaderQuery
1685 * @param ResourceLoaderContext $context
1686 * @param array $extraQuery
1689 protected static function createLoaderQuery( ResourceLoaderContext
$context, $extraQuery = [] ) {
1690 return self
::makeLoaderQuery(
1691 $context->getModules(),
1692 $context->getLanguage(),
1693 $context->getSkin(),
1694 $context->getUser(),
1695 $context->getVersion(),
1696 $context->getDebug(),
1697 $context->getOnly(),
1698 $context->getRequest()->getBool( 'printable' ),
1699 $context->getRequest()->getBool( 'handheld' ),
1705 * Build a query array (array representation of query string) for load.php. Helper
1706 * function for createLoaderURL().
1708 * @param array $modules
1709 * @param string $lang
1710 * @param string $skin
1711 * @param string|null $user
1712 * @param string|null $version
1713 * @param bool $debug
1714 * @param string|null $only
1715 * @param bool $printable
1716 * @param bool $handheld
1717 * @param array $extraQuery
1720 public static function makeLoaderQuery( $modules, $lang, $skin, $user = null,
1721 $version = null, $debug = false, $only = null, $printable = false,
1722 $handheld = false, $extraQuery = []
1725 'modules' => self
::makePackedModulesString( $modules ),
1727 // Keep urls short by omitting query parameters that
1728 // match the defaults assumed by ResourceLoaderContext.
1729 // Note: This relies on the defaults either being insignificant or forever constant,
1730 // as otherwise cached urls could change in meaning when the defaults change.
1731 if ( $lang !== ResourceLoaderContext
::DEFAULT_LANG
) {
1732 $query['lang'] = $lang;
1734 if ( $skin !== ResourceLoaderContext
::DEFAULT_SKIN
) {
1735 $query['skin'] = $skin;
1737 if ( $debug === true ) {
1738 $query['debug'] = 'true';
1740 if ( $user !== null ) {
1741 $query['user'] = $user;
1743 if ( $version !== null ) {
1744 $query['version'] = $version;
1746 if ( $only !== null ) {
1747 $query['only'] = $only;
1750 $query['printable'] = 1;
1753 $query['handheld'] = 1;
1755 $query +
= $extraQuery;
1757 // Make queries uniform in order
1763 * Check a module name for validity.
1765 * Module names may not contain pipes (|), commas (,) or exclamation marks (!) and can be
1766 * at most 255 bytes.
1768 * @param string $moduleName Module name to check
1769 * @return bool Whether $moduleName is a valid module name
1771 public static function isValidModuleName( $moduleName ) {
1772 return strcspn( $moduleName, '!,|', 0, 255 ) === strlen( $moduleName );
1776 * Returns LESS compiler set up for use with MediaWiki
1779 * @param array $vars Associative array of variables that should be used
1780 * for compilation. Since 1.32, this method no longer automatically includes
1781 * global LESS vars from ResourceLoader::getLessVars (T191937).
1782 * @throws MWException
1783 * @return Less_Parser
1785 public function getLessCompiler( $vars = [] ) {
1787 // When called from the installer, it is possible that a required PHP extension
1788 // is missing (at least for now; see T49564). If this is the case, throw an
1789 // exception (caught by the installer) to prevent a fatal error later on.
1790 if ( !class_exists( 'Less_Parser' ) ) {
1791 throw new MWException( 'MediaWiki requires the less.php parser' );
1794 $parser = new Less_Parser
;
1795 $parser->ModifyVars( $vars );
1796 $parser->SetImportDirs( [
1797 "$IP/resources/src/mediawiki.less/" => '',
1799 $parser->SetOption( 'relativeUrls', false );
1805 * Get global LESS variables.
1808 * @deprecated since 1.32 Use ResourceLoderModule::getLessVars() instead.
1809 * @return array Map of variable names to string CSS values.
1811 public function getLessVars() {