array( 'mediawiki.tests.qunit.suites', 'ext.foo.tests', .. ), .. ) * @var array */ protected $testModuleNames = array(); /** * E.g. array( 'source-id' => 'http://.../load.php' ) * @var array */ protected $sources = array(); /** * Errors accumulated during current respond() call. * @var array */ protected $errors = array(); /** * @var MessageBlobStore */ protected $blobStore; /** * Load information stored in the database about modules. * * This method grabs modules dependencies from the database and updates modules * objects. * * This is not inside the module code because it is much faster to * request all of the information at once than it is to have each module * requests its own information. This sacrifice of modularity yields a substantial * performance improvement. * * @param array $modules List of module names to preload information for * @param ResourceLoaderContext $context Context to load the information within */ public function preloadModuleInfo( array $modules, ResourceLoaderContext $context ) { if ( !count( $modules ) ) { // Or else Database*::select() will explode, plus it's cheaper! return; } $dbr = wfGetDB( DB_SLAVE ); $skin = $context->getSkin(); $lang = $context->getLanguage(); // Get file dependency information $res = $dbr->select( 'module_deps', array( 'md_module', 'md_deps' ), array( 'md_module' => $modules, 'md_skin' => $skin ), __METHOD__ ); // Set modules' dependencies $modulesWithDeps = array(); foreach ( $res as $row ) { $module = $this->getModule( $row->md_module ); if ( $module ) { $module->setFileDependencies( $skin, FormatJson::decode( $row->md_deps, true ) ); $modulesWithDeps[] = $row->md_module; } } // Register the absence of a dependency row too foreach ( array_diff( $modules, $modulesWithDeps ) as $name ) { $module = $this->getModule( $name ); if ( $module ) { $this->getModule( $name )->setFileDependencies( $skin, array() ); } } // Get message blob mtimes. Only do this for modules with messages $modulesWithMessages = array(); foreach ( $modules as $name ) { $module = $this->getModule( $name ); if ( $module && count( $module->getMessages() ) ) { $modulesWithMessages[] = $name; } } $modulesWithoutMessages = array_flip( $modules ); // Will be trimmed down by the loop below if ( count( $modulesWithMessages ) ) { $res = $dbr->select( 'msg_resource', array( 'mr_resource', 'mr_timestamp' ), array( 'mr_resource' => $modulesWithMessages, 'mr_lang' => $lang ), __METHOD__ ); foreach ( $res as $row ) { $module = $this->getModule( $row->mr_resource ); if ( $module ) { $module->setMsgBlobMtime( $lang, wfTimestamp( TS_UNIX, $row->mr_timestamp ) ); unset( $modulesWithoutMessages[$row->mr_resource] ); } } } foreach ( array_keys( $modulesWithoutMessages ) as $name ) { $module = $this->getModule( $name ); if ( $module ) { $module->setMsgBlobMtime( $lang, 1 ); } } } /** * Run JavaScript or CSS data through a filter, caching the filtered result for future calls. * * Available filters are: * * - minify-js \see JavaScriptMinifier::minify * - minify-css \see CSSMin::minify * * If $data is empty, only contains whitespace or the filter was unknown, * $data is returned unmodified. * * @param string $filter Name of filter to run * @param string $data Text to filter, such as JavaScript or CSS text * @param string $cacheReport Whether to include the cache key report * @return string Filtered data, or a comment containing an error message */ public function filter( $filter, $data, $cacheReport = true ) { // For empty/whitespace-only data or for unknown filters, don't perform // any caching or processing if ( trim( $data ) === '' || !in_array( $filter, array( 'minify-js', 'minify-css' ) ) ) { return $data; } // Try for cache hit // Use CACHE_ANYTHING since filtering is very slow compared to DB queries $key = wfMemcKey( 'resourceloader', 'filter', $filter, self::$filterCacheVersion, md5( $data ) ); $cache = wfGetCache( CACHE_ANYTHING ); $cacheEntry = $cache->get( $key ); if ( is_string( $cacheEntry ) ) { wfIncrStats( "rl-$filter-cache-hits" ); return $cacheEntry; } $result = ''; // Run the filter - we've already verified one of these will work try { wfIncrStats( "rl-$filter-cache-misses" ); switch ( $filter ) { case 'minify-js': $result = JavaScriptMinifier::minify( $data, $this->config->get( 'ResourceLoaderMinifierStatementsOnOwnLine' ), $this->config->get( 'ResourceLoaderMinifierMaxLineLength' ) ); if ( $cacheReport ) { $result .= "\n/* cache key: $key */"; } break; case 'minify-css': $result = CSSMin::minify( $data ); if ( $cacheReport ) { $result .= "\n/* cache key: $key */"; } break; } // Save filtered text to Memcached $cache->set( $key, $result ); } catch ( Exception $e ) { MWExceptionHandler::logException( $e ); wfDebugLog( 'resourceloader', __METHOD__ . ": minification failed: $e" ); $this->errors[] = self::formatExceptionNoComment( $e ); } return $result; } /* Methods */ /** * Register core modules and runs registration hooks. * @param Config|null $config */ public function __construct( Config $config = null ) { global $IP; if ( $config === null ) { wfDebug( __METHOD__ . ' was called without providing a Config instance' ); $config = ConfigFactory::getDefaultInstance()->makeConfig( 'main' ); } $this->config = $config; // Add 'local' source first $this->addSource( 'local', wfScript( 'load' ) ); // Add other sources $this->addSource( $config->get( 'ResourceLoaderSources' ) ); // Register core modules $this->register( include "$IP/resources/Resources.php" ); // Register extension modules Hooks::run( 'ResourceLoaderRegisterModules', array( &$this ) ); $this->register( $config->get( 'ResourceModules' ) ); if ( $config->get( 'EnableJavaScriptTest' ) === true ) { $this->registerTestModules(); } $this->setMessageBlobStore( new MessageBlobStore() ); } /** * @return Config */ public function getConfig() { return $this->config; } /** * @param MessageBlobStore $blobStore * @since 1.25 */ public function setMessageBlobStore( MessageBlobStore $blobStore ) { $this->blobStore = $blobStore; } /** * Register a module with the ResourceLoader system. * * @param mixed $name Name of module as a string or List of name/object pairs as an array * @param array $info Module info array. For backwards compatibility with 1.17alpha, * this may also be a ResourceLoaderModule object. Optional when using * multiple-registration calling style. * @throws MWException If a duplicate module registration is attempted * @throws MWException If a module name contains illegal characters (pipes or commas) * @throws MWException If something other than a ResourceLoaderModule is being registered * @return bool False if there were any errors, in which case one or more modules were * not registered */ public function register( $name, $info = null ) { // Allow multiple modules to be registered in one call $registrations = is_array( $name ) ? $name : array( $name => $info ); foreach ( $registrations as $name => $info ) { // Disallow duplicate registrations if ( isset( $this->moduleInfos[$name] ) ) { // A module has already been registered by this name throw new MWException( 'ResourceLoader duplicate registration error. ' . 'Another module has already been registered as ' . $name ); } // Check $name for validity if ( !self::isValidModuleName( $name ) ) { throw new MWException( "ResourceLoader module name '$name' is invalid, " . "see ResourceLoader::isValidModuleName()" ); } // Attach module if ( $info instanceof ResourceLoaderModule ) { $this->moduleInfos[$name] = array( 'object' => $info ); $info->setName( $name ); $this->modules[$name] = $info; } elseif ( is_array( $info ) ) { // New calling convention $this->moduleInfos[$name] = $info; } else { throw new MWException( 'ResourceLoader module info type error for module \'' . $name . '\': expected ResourceLoaderModule or array (got: ' . gettype( $info ) . ')' ); } // Last-minute changes // Apply custom skin-defined styles to existing modules. if ( $this->isFileModule( $name ) ) { foreach ( $this->config->get( 'ResourceModuleSkinStyles' ) as $skinName => $skinStyles ) { // If this module already defines skinStyles for this skin, ignore $wgResourceModuleSkinStyles. if ( isset( $this->moduleInfos[$name]['skinStyles'][$skinName] ) ) { continue; } // If $name is preceded with a '+', the defined style files will be added to 'default' // skinStyles, otherwise 'default' will be ignored as it normally would be. if ( isset( $skinStyles[$name] ) ) { $paths = (array)$skinStyles[$name]; $styleFiles = array(); } elseif ( isset( $skinStyles['+' . $name] ) ) { $paths = (array)$skinStyles['+' . $name]; $styleFiles = isset( $this->moduleInfos[$name]['skinStyles']['default'] ) ? (array)$this->moduleInfos[$name]['skinStyles']['default'] : array(); } else { continue; } // Add new file paths, remapping them to refer to our directories and not use settings // from the module we're modifying, which come from the base definition. list( $localBasePath, $remoteBasePath ) = ResourceLoaderFileModule::extractBasePaths( $skinStyles ); foreach ( $paths as $path ) { $styleFiles[] = new ResourceLoaderFilePath( $path, $localBasePath, $remoteBasePath ); } $this->moduleInfos[$name]['skinStyles'][$skinName] = $styleFiles; } } } } /** */ public function registerTestModules() { global $IP; if ( $this->config->get( 'EnableJavaScriptTest' ) !== true ) { throw new MWException( 'Attempt to register JavaScript test modules ' . 'but $wgEnableJavaScriptTest is false. ' . 'Edit your LocalSettings.php to enable it.' ); } // Get core test suites $testModules = array(); $testModules['qunit'] = array(); // Get other test suites (e.g. from extensions) Hooks::run( 'ResourceLoaderTestModules', array( &$testModules, &$this ) ); // Add the testrunner (which configures QUnit) to the dependencies. // Since it must be ready before any of the test suites are executed. foreach ( $testModules['qunit'] as &$module ) { // Make sure all test modules are top-loading so that when QUnit starts // on document-ready, it will run once and finish. If some tests arrive // later (possibly after QUnit has already finished) they will be ignored. $module['position'] = 'top'; $module['dependencies'][] = 'test.mediawiki.qunit.testrunner'; } $testModules['qunit'] = ( include "$IP/tests/qunit/QUnitTestResources.php" ) + $testModules['qunit']; foreach ( $testModules as $id => $names ) { // Register test modules $this->register( $testModules[$id] ); // Keep track of their names so that they can be loaded together $this->testModuleNames[$id] = array_keys( $testModules[$id] ); } } /** * Add a foreign source of modules. * * @param array|string $id Source ID (string), or array( id1 => loadUrl, id2 => loadUrl, ... ) * @param string|array $loadUrl load.php url (string), or array with loadUrl key for * backwards-compatibility. * @throws MWException */ public function addSource( $id, $loadUrl = null ) { // Allow multiple sources to be registered in one call if ( is_array( $id ) ) { foreach ( $id as $key => $value ) { $this->addSource( $key, $value ); } return; } // Disallow duplicates if ( isset( $this->sources[$id] ) ) { throw new MWException( 'ResourceLoader duplicate source addition error. ' . 'Another source has already been registered as ' . $id ); } // Pre 1.24 backwards-compatibility if ( is_array( $loadUrl ) ) { if ( !isset( $loadUrl['loadScript'] ) ) { throw new MWException( __METHOD__ . ' was passed an array with no "loadScript" key.' ); } $loadUrl = $loadUrl['loadScript']; } $this->sources[$id] = $loadUrl; } /** * Get a list of module names. * * @return array List of module names */ public function getModuleNames() { return array_keys( $this->moduleInfos ); } /** * Get a list of test module names for one (or all) frameworks. * * If the given framework id is unknkown, or if the in-object variable is not an array, * then it will return an empty array. * * @param string $framework Get only the test module names for one * particular framework (optional) * @return array */ public function getTestModuleNames( $framework = 'all' ) { /** @todo api siteinfo prop testmodulenames modulenames */ if ( $framework == 'all' ) { return $this->testModuleNames; } elseif ( isset( $this->testModuleNames[$framework] ) && is_array( $this->testModuleNames[$framework] ) ) { return $this->testModuleNames[$framework]; } else { return array(); } } /** * Check whether a ResourceLoader module is registered * * @since 1.25 * @param string $name * @return bool */ public function isModuleRegistered( $name ) { return isset( $this->moduleInfos[$name] ); } /** * Get the ResourceLoaderModule object for a given module name. * * If an array of module parameters exists but a ResourceLoaderModule object has not * yet been instantiated, this method will instantiate and cache that object such that * subsequent calls simply return the same object. * * @param string $name Module name * @return ResourceLoaderModule|null If module has been registered, return a * ResourceLoaderModule instance. Otherwise, return null. */ public function getModule( $name ) { if ( !isset( $this->modules[$name] ) ) { if ( !isset( $this->moduleInfos[$name] ) ) { // No such module return null; } // Construct the requested object $info = $this->moduleInfos[$name]; /** @var ResourceLoaderModule $object */ if ( isset( $info['object'] ) ) { // Object given in info array $object = $info['object']; } else { if ( !isset( $info['class'] ) ) { $class = 'ResourceLoaderFileModule'; } else { $class = $info['class']; } /** @var ResourceLoaderModule $object */ $object = new $class( $info ); $object->setConfig( $this->getConfig() ); } $object->setName( $name ); $this->modules[$name] = $object; } return $this->modules[$name]; } /** * Return whether the definition of a module corresponds to a simple ResourceLoaderFileModule. * * @param string $name Module name * @return bool */ protected function isFileModule( $name ) { if ( !isset( $this->moduleInfos[$name] ) ) { return false; } $info = $this->moduleInfos[$name]; if ( isset( $info['object'] ) || isset( $info['class'] ) ) { return false; } return true; } /** * Get the list of sources. * * @return array Like array( id => load.php url, .. ) */ public function getSources() { return $this->sources; } /** * Get the URL to the load.php endpoint for the given * ResourceLoader source * * @since 1.24 * @param string $source * @throws MWException On an invalid $source name * @return string */ public function getLoadScript( $source ) { if ( !isset( $this->sources[$source] ) ) { throw new MWException( "The $source source was never registered in ResourceLoader." ); } return $this->sources[$source]; } /** * Output a response to a load request, including the content-type header. * * @param ResourceLoaderContext $context Context in which a response should be formed */ public function respond( ResourceLoaderContext $context ) { // Use file cache if enabled and available... if ( $this->config->get( 'UseFileCache' ) ) { $fileCache = ResourceFileCache::newFromContext( $context ); if ( $this->tryRespondFromFileCache( $fileCache, $context ) ) { return; // output handled } } // Buffer output to catch warnings. Normally we'd use ob_clean() on the // top-level output buffer to clear warnings, but that breaks when ob_gzhandler // is used: ob_clean() will clear the GZIP header in that case and it won't come // back for subsequent output, resulting in invalid GZIP. So we have to wrap // the whole thing in our own output buffer to be sure the active buffer // doesn't use ob_gzhandler. // See http://bugs.php.net/bug.php?id=36514 ob_start(); // Find out which modules are missing and instantiate the others $modules = array(); $missing = array(); foreach ( $context->getModules() as $name ) { $module = $this->getModule( $name ); if ( $module ) { // Do not allow private modules to be loaded from the web. // This is a security issue, see bug 34907. if ( $module->getGroup() === 'private' ) { wfDebugLog( 'resourceloader', __METHOD__ . ": request for private module '$name' denied" ); $this->errors[] = "Cannot show private module \"$name\""; continue; } $modules[$name] = $module; } else { $missing[] = $name; } } // Preload information needed to the mtime calculation below try { $this->preloadModuleInfo( array_keys( $modules ), $context ); } catch ( Exception $e ) { MWExceptionHandler::logException( $e ); wfDebugLog( 'resourceloader', __METHOD__ . ": preloading module info failed: $e" ); $this->errors[] = self::formatExceptionNoComment( $e ); } // To send Last-Modified and support If-Modified-Since, we need to detect // the last modified time $mtime = wfTimestamp( TS_UNIX, $this->config->get( 'CacheEpoch' ) ); foreach ( $modules as $module ) { /** * @var $module ResourceLoaderModule */ try { // Calculate maximum modified time $mtime = max( $mtime, $module->getModifiedTime( $context ) ); } catch ( Exception $e ) { MWExceptionHandler::logException( $e ); wfDebugLog( 'resourceloader', __METHOD__ . ": calculating maximum modified time failed: $e" ); $this->errors[] = self::formatExceptionNoComment( $e ); } } // If there's an If-Modified-Since header, respond with a 304 appropriately if ( $this->tryRespondLastModified( $context, $mtime ) ) { return; // output handled (buffers cleared) } // Generate a response $response = $this->makeModuleResponse( $context, $modules, $missing ); // Capture any PHP warnings from the output buffer and append them to the // error list if we're in debug mode. if ( $context->getDebug() && strlen( $warnings = ob_get_contents() ) ) { $this->errors[] = $warnings; } // Save response to file cache unless there are errors if ( isset( $fileCache ) && !$this->errors && !count( $missing ) ) { // Cache single modules and images...and other requests if there are enough hits if ( ResourceFileCache::useFileCache( $context ) ) { if ( $fileCache->isCacheWorthy() ) { $fileCache->saveText( $response ); } else { $fileCache->incrMissesRecent( $context->getRequest() ); } } } // Send content type and cache related headers $this->sendResponseHeaders( $context, $mtime, (bool)$this->errors ); // Remove the output buffer and output the response ob_end_clean(); if ( $context->getImageObj() && $this->errors ) { // We can't show both the error messages and the response when it's an image. $errorText = ''; foreach ( $this->errors as $error ) { $errorText .= $error . "\n"; } $response = $errorText; } elseif ( $this->errors ) { // Prepend comments indicating errors $errorText = ''; foreach ( $this->errors as $error ) { $errorText .= self::makeComment( $error ); } $response = $errorText . $response; } $this->errors = array(); echo $response; } /** * Send content type and last modified headers to the client. * @param ResourceLoaderContext $context * @param string $mtime TS_MW timestamp to use for last-modified * @param bool $errors Whether there are errors in the response * @return void */ protected function sendResponseHeaders( ResourceLoaderContext $context, $mtime, $errors ) { $rlMaxage = $this->config->get( 'ResourceLoaderMaxage' ); // If a version wasn't specified we need a shorter expiry time for updates // to propagate to clients quickly // If there were errors, we also need a shorter expiry time so we can recover quickly if ( is_null( $context->getVersion() ) || $errors ) { $maxage = $rlMaxage['unversioned']['client']; $smaxage = $rlMaxage['unversioned']['server']; // If a version was specified we can use a longer expiry time since changing // version numbers causes cache misses } else { $maxage = $rlMaxage['versioned']['client']; $smaxage = $rlMaxage['versioned']['server']; } if ( $context->getImageObj() ) { // Output different headers if we're outputting textual errors. if ( $errors ) { header( 'Content-Type: text/plain; charset=utf-8' ); } else { $context->getImageObj()->sendResponseHeaders( $context ); } } elseif ( $context->getOnly() === 'styles' ) { header( 'Content-Type: text/css; charset=utf-8' ); header( 'Access-Control-Allow-Origin: *' ); } else { header( 'Content-Type: text/javascript; charset=utf-8' ); } header( 'Last-Modified: ' . wfTimestamp( TS_RFC2822, $mtime ) ); if ( $context->getDebug() ) { // Do not cache debug responses header( 'Cache-Control: private, no-cache, must-revalidate' ); header( 'Pragma: no-cache' ); } else { header( "Cache-Control: public, max-age=$maxage, s-maxage=$smaxage" ); $exp = min( $maxage, $smaxage ); header( 'Expires: ' . wfTimestamp( TS_RFC2822, $exp + time() ) ); } } /** * Respond with 304 Last Modified if appropiate. * * If there's an If-Modified-Since header, respond with a 304 appropriately * and clear out the output buffer. If the client cache is too old then do nothing. * * @param ResourceLoaderContext $context * @param string $mtime The TS_MW timestamp to check the header against * @return bool True if 304 header sent and output handled */ protected function tryRespondLastModified( ResourceLoaderContext $context, $mtime ) { // If there's an If-Modified-Since header, respond with a 304 appropriately // Some clients send "timestamp;length=123". Strip the part after the first ';' // so we get a valid timestamp. $ims = $context->getRequest()->getHeader( 'If-Modified-Since' ); // Never send 304s in debug mode if ( $ims !== false && !$context->getDebug() ) { $imsTS = strtok( $ims, ';' ); if ( $mtime <= wfTimestamp( TS_UNIX, $imsTS ) ) { // There's another bug in ob_gzhandler (see also the comment at // the top of this function) that causes it to gzip even empty // responses, meaning it's impossible to produce a truly empty // response (because the gzip header is always there). This is // a problem because 304 responses have to be completely empty // per the HTTP spec, and Firefox behaves buggily when they're not. // See also http://bugs.php.net/bug.php?id=51579 // To work around this, we tear down all output buffering before // sending the 304. wfResetOutputBuffers( /* $resetGzipEncoding = */ true ); header( 'HTTP/1.0 304 Not Modified' ); header( 'Status: 304 Not Modified' ); return true; } } return false; } /** * Send out code for a response from file cache if possible. * * @param ResourceFileCache $fileCache Cache object for this request URL * @param ResourceLoaderContext $context Context in which to generate a response * @return bool If this found a cache file and handled the response */ protected function tryRespondFromFileCache( ResourceFileCache $fileCache, ResourceLoaderContext $context ) { $rlMaxage = $this->config->get( 'ResourceLoaderMaxage' ); // Buffer output to catch warnings. ob_start(); // Get the maximum age the cache can be $maxage = is_null( $context->getVersion() ) ? $rlMaxage['unversioned']['server'] : $rlMaxage['versioned']['server']; // Minimum timestamp the cache file must have $good = $fileCache->isCacheGood( wfTimestamp( TS_MW, time() - $maxage ) ); if ( !$good ) { try { // RL always hits the DB on file cache miss... wfGetDB( DB_SLAVE ); } catch ( DBConnectionError $e ) { // ...check if we need to fallback to cache $good = $fileCache->isCacheGood(); // cache existence check } } if ( $good ) { $ts = $fileCache->cacheTimestamp(); // Send content type and cache headers $this->sendResponseHeaders( $context, $ts, false ); // If there's an If-Modified-Since header, respond with a 304 appropriately if ( $this->tryRespondLastModified( $context, $ts ) ) { return false; // output handled (buffers cleared) } $response = $fileCache->fetchText(); // Capture any PHP warnings from the output buffer and append them to the // response in a comment if we're in debug mode. if ( $context->getDebug() && strlen( $warnings = ob_get_contents() ) ) { $response = "/*\n$warnings\n*/\n" . $response; } // Remove the output buffer and output the response ob_end_clean(); echo $response . "\n/* Cached {$ts} */"; return true; // cache hit } // Clear buffer ob_end_clean(); return false; // cache miss } /** * Generate a CSS or JS comment block. * * Only use this for public data, not error message details. * * @param string $text * @return string */ public static function makeComment( $text ) { $encText = str_replace( '*/', '* /', $text ); return "/*\n$encText\n*/\n"; } /** * Handle exception display. * * @param Exception $e Exception to be shown to the user * @return string Sanitized text in a CSS/JS comment that can be returned to the user */ public static function formatException( $e ) { return self::makeComment( self::formatExceptionNoComment( $e ) ); } /** * Handle exception display. * * @since 1.25 * @param Exception $e Exception to be shown to the user * @return string Sanitized text that can be returned to the user */ protected static function formatExceptionNoComment( $e ) { global $wgShowExceptionDetails; if ( $wgShowExceptionDetails ) { return $e->__toString(); } else { return wfMessage( 'internalerror' )->text(); } } /** * Generate code for a response. * * @param ResourceLoaderContext $context Context in which to generate a response * @param array $modules List of module objects keyed by module name * @param array $missing List of requested module names that are unregistered (optional) * @return string Response data */ public function makeModuleResponse( ResourceLoaderContext $context, array $modules, array $missing = array() ) { $out = ''; $states = array(); if ( !count( $modules ) && !count( $missing ) ) { return <<. In this request, no modules were requested. Max made me put this here. */ MESSAGE; } $image = $context->getImageObj(); if ( $image ) { $data = $image->getImageData( $context ); if ( $data === false ) { $data = ''; $this->errors[] = 'Image generation failed'; } return $data; } // Pre-fetch blobs if ( $context->shouldIncludeMessages() ) { try { $blobs = $this->blobStore->get( $this, $modules, $context->getLanguage() ); } catch ( Exception $e ) { MWExceptionHandler::logException( $e ); wfDebugLog( 'resourceloader', __METHOD__ . ": pre-fetching blobs from MessageBlobStore failed: $e" ); $this->errors[] = self::formatExceptionNoComment( $e ); } } else { $blobs = array(); } foreach ( $missing as $name ) { $states[$name] = 'missing'; } // Generate output $isRaw = false; foreach ( $modules as $name => $module ) { /** * @var $module ResourceLoaderModule */ try { $scripts = ''; if ( $context->shouldIncludeScripts() ) { // If we are in debug mode, we'll want to return an array of URLs if possible // However, we can't do this if the module doesn't support it // We also can't do this if there is an only= parameter, because we have to give // the module a way to return a load.php URL without causing an infinite loop if ( $context->getDebug() && !$context->getOnly() && $module->supportsURLLoading() ) { $scripts = $module->getScriptURLsForDebug( $context ); } else { $scripts = $module->getScript( $context ); // rtrim() because there are usually a few line breaks // after the last ';'. A new line at EOF, a new line // added by ResourceLoaderFileModule::readScriptFiles, etc. if ( is_string( $scripts ) && strlen( $scripts ) && substr( rtrim( $scripts ), -1 ) !== ';' ) { // Append semicolon to prevent weird bugs caused by files not // terminating their statements right (bug 27054) $scripts .= ";\n"; } } } // Styles $styles = array(); if ( $context->shouldIncludeStyles() ) { // Don't create empty stylesheets like array( '' => '' ) for modules // that don't *have* any stylesheets (bug 38024). $stylePairs = $module->getStyles( $context ); if ( count( $stylePairs ) ) { // If we are in debug mode without &only= set, we'll want to return an array of URLs // See comment near shouldIncludeScripts() for more details if ( $context->getDebug() && !$context->getOnly() && $module->supportsURLLoading() ) { $styles = array( 'url' => $module->getStyleURLsForDebug( $context ) ); } else { // Minify CSS before embedding in mw.loader.implement call // (unless in debug mode) if ( !$context->getDebug() ) { foreach ( $stylePairs as $media => $style ) { // Can be either a string or an array of strings. if ( is_array( $style ) ) { $stylePairs[$media] = array(); foreach ( $style as $cssText ) { if ( is_string( $cssText ) ) { $stylePairs[$media][] = $this->filter( 'minify-css', $cssText ); } } } elseif ( is_string( $style ) ) { $stylePairs[$media] = $this->filter( 'minify-css', $style ); } } } // Wrap styles into @media groups as needed and flatten into a numerical array $styles = array( 'css' => self::makeCombinedStyles( $stylePairs ) ); } } } // Messages $messagesBlob = isset( $blobs[$name] ) ? $blobs[$name] : '{}'; // Append output switch ( $context->getOnly() ) { case 'scripts': if ( is_string( $scripts ) ) { // Load scripts raw... $out .= $scripts; } elseif ( is_array( $scripts ) ) { // ...except when $scripts is an array of URLs $out .= self::makeLoaderImplementScript( $name, $scripts, array(), array() ); } break; case 'styles': // We no longer seperate into media, they are all combined now with // custom media type groups into @media .. {} sections as part of the css string. // Module returns either an empty array or a numerical array with css strings. $out .= isset( $styles['css'] ) ? implode( '', $styles['css'] ) : ''; break; case 'messages': $out .= self::makeMessageSetScript( new XmlJsCode( $messagesBlob ) ); break; case 'templates': $out .= Xml::encodeJsCall( 'mw.templates.set', array( $name, (object)$module->getTemplates() ), ResourceLoader::inDebugMode() ); break; default: $out .= self::makeLoaderImplementScript( $name, $scripts, $styles, new XmlJsCode( $messagesBlob ), $module->getTemplates() ); break; } } catch ( Exception $e ) { MWExceptionHandler::logException( $e ); wfDebugLog( 'resourceloader', __METHOD__ . ": generating module package failed: $e" ); $this->errors[] = self::formatExceptionNoComment( $e ); // Respond to client with error-state instead of module implementation $states[$name] = 'error'; unset( $modules[$name] ); } $isRaw |= $module->isRaw(); } // Update module states if ( $context->shouldIncludeScripts() && !$context->getRaw() && !$isRaw ) { if ( count( $modules ) && $context->getOnly() === 'scripts' ) { // Set the state of modules loaded as only scripts to ready as // they don't have an mw.loader.implement wrapper that sets the state foreach ( $modules as $name => $module ) { $states[$name] = 'ready'; } } // Set the state of modules we didn't respond to with mw.loader.implement if ( count( $states ) ) { $out .= self::makeLoaderStateScript( $states ); } } else { if ( count( $states ) ) { $this->errors[] = 'Problematic modules: ' . FormatJson::encode( $states, ResourceLoader::inDebugMode() ); } } if ( !$context->getDebug() ) { if ( $context->getOnly() === 'styles' ) { $out = $this->filter( 'minify-css', $out ); } else { $out = $this->filter( 'minify-js', $out ); } } return $out; } /* Static Methods */ /** * Return JS code that calls mw.loader.implement with given module properties. * * @param string $name Module name * @param mixed $scripts List of URLs to JavaScript files or String of JavaScript code * @param mixed $styles Array of CSS strings keyed by media type, or an array of lists of URLs * to CSS files keyed by media type * @param mixed $messages List of messages associated with this module. May either be an * associative array mapping message key to value, or a JSON-encoded message blob containing * the same data, wrapped in an XmlJsCode object. * @param array $templates Keys are name of templates and values are the source of * the template. * @throws MWException * @return string */ public static function makeLoaderImplementScript( $name, $scripts, $styles, $messages, $templates ) { if ( is_string( $scripts ) ) { $scripts = new XmlJsCode( "function ( $, jQuery ) {\n{$scripts}\n}" ); } elseif ( !is_array( $scripts ) ) { throw new MWException( 'Invalid scripts error. Array of URLs or string of code expected.' ); } // mw.loader.implement requires 'styles', 'messages' and 'templates' to be objects (not // arrays). json_encode considers empty arrays to be numerical and outputs "[]" instead // of "{}". Force them to objects. $module = array( $name, $scripts, (object) $styles, (object) $messages, (object) $templates, ); self::trimArray( $module ); return Xml::encodeJsCall( 'mw.loader.implement', $module, ResourceLoader::inDebugMode() ); } /** * Returns JS code which, when called, will register a given list of messages. * * @param mixed $messages Either an associative array mapping message key to value, or a * JSON-encoded message blob containing the same data, wrapped in an XmlJsCode object. * @return string */ public static function makeMessageSetScript( $messages ) { return Xml::encodeJsCall( 'mw.messages.set', array( (object)$messages ), ResourceLoader::inDebugMode() ); } /** * Combines an associative array mapping media type to CSS into a * single stylesheet with "@media" blocks. * * @param array $stylePairs Array keyed by media type containing (arrays of) CSS strings * @return array */ public static function makeCombinedStyles( array $stylePairs ) { $out = array(); foreach ( $stylePairs as $media => $styles ) { // ResourceLoaderFileModule::getStyle can return the styles // as a string or an array of strings. This is to allow separation in // the front-end. $styles = (array)$styles; foreach ( $styles as $style ) { $style = trim( $style ); // Don't output an empty "@media print { }" block (bug 40498) if ( $style !== '' ) { // Transform the media type based on request params and config // The way that this relies on $wgRequest to propagate request params is slightly evil $media = OutputPage::transformCssMedia( $media ); if ( $media === '' || $media == 'all' ) { $out[] = $style; } elseif ( is_string( $media ) ) { $out[] = "@media $media {\n" . str_replace( "\n", "\n\t", "\t" . $style ) . "}"; } // else: skip } } } return $out; } /** * Returns a JS call to mw.loader.state, which sets the state of a * module or modules to a given value. Has two calling conventions: * * - ResourceLoader::makeLoaderStateScript( $name, $state ): * Set the state of a single module called $name to $state * * - ResourceLoader::makeLoaderStateScript( array( $name => $state, ... ) ): * Set the state of modules with the given names to the given states * * @param string $name * @param string $state * @return string */ public static function makeLoaderStateScript( $name, $state = null ) { if ( is_array( $name ) ) { return Xml::encodeJsCall( 'mw.loader.state', array( $name ), ResourceLoader::inDebugMode() ); } else { return Xml::encodeJsCall( 'mw.loader.state', array( $name, $state ), ResourceLoader::inDebugMode() ); } } /** * Returns JS code which calls the script given by $script. The script will * be called with local variables name, version, dependencies and group, * which will have values corresponding to $name, $version, $dependencies * and $group as supplied. * * @param string $name Module name * @param int $version Module version number as a timestamp * @param array $dependencies List of module names on which this module depends * @param string $group Group which the module is in. * @param string $source Source of the module, or 'local' if not foreign. * @param string $script JavaScript code * @return string */ public static function makeCustomLoaderScript( $name, $version, $dependencies, $group, $source, $script ) { $script = str_replace( "\n", "\n\t", trim( $script ) ); return Xml::encodeJsCall( "( function ( name, version, dependencies, group, source ) {\n\t$script\n} )", array( $name, $version, $dependencies, $group, $source ), ResourceLoader::inDebugMode() ); } private static function isEmptyObject( stdClass $obj ) { foreach ( $obj as $key => &$value ) { return false; } return true; } /** * Remove empty values from the end of an array. * * Values considered empty: * * - null * - array() * - new XmlJsCode( '{}' ) * - new stdClass() // (object) array() * * @param Array $array */ private static function trimArray( Array &$array ) { $i = count( $array ); while ( $i-- ) { if ( $array[$i] === null || $array[$i] === array() || ( $array[$i] instanceof XmlJsCode && $array[$i]->value === '{}' ) || ( $array[$i] instanceof stdClass && self::isEmptyObject( $array[$i] ) ) ) { unset( $array[$i] ); } else { break; } } } /** * Returns JS code which calls mw.loader.register with the given * parameters. Has three calling conventions: * * - ResourceLoader::makeLoaderRegisterScript( $name, $version, * $dependencies, $group, $source, $skip * ): * Register a single module. * * - ResourceLoader::makeLoaderRegisterScript( array( $name1, $name2 ) ): * Register modules with the given names. * * - ResourceLoader::makeLoaderRegisterScript( array( * array( $name1, $version1, $dependencies1, $group1, $source1, $skip1 ), * array( $name2, $version2, $dependencies1, $group2, $source2, $skip2 ), * ... * ) ): * Registers modules with the given names and parameters. * * @param string $name Module name * @param int $version Module version number as a timestamp * @param array $dependencies List of module names on which this module depends * @param string $group Group which the module is in * @param string $source Source of the module, or 'local' if not foreign * @param string $skip Script body of the skip function * @return string */ public static function makeLoaderRegisterScript( $name, $version = null, $dependencies = null, $group = null, $source = null, $skip = null ) { if ( is_array( $name ) ) { // Build module name index $index = array(); foreach ( $name as $i => &$module ) { $index[$module[0]] = $i; } // Transform dependency names into indexes when possible, they will be resolved by // mw.loader.register on the other end foreach ( $name as &$module ) { if ( isset( $module[2] ) ) { foreach ( $module[2] as &$dependency ) { if ( isset( $index[$dependency] ) ) { $dependency = $index[$dependency]; } } } } array_walk( $name, array( 'self', 'trimArray' ) ); return Xml::encodeJsCall( 'mw.loader.register', array( $name ), ResourceLoader::inDebugMode() ); } else { $registration = array( $name, $version, $dependencies, $group, $source, $skip ); self::trimArray( $registration ); return Xml::encodeJsCall( 'mw.loader.register', $registration, ResourceLoader::inDebugMode() ); } } /** * Returns JS code which calls mw.loader.addSource() with the given * parameters. Has two calling conventions: * * - ResourceLoader::makeLoaderSourcesScript( $id, $properties ): * Register a single source * * - ResourceLoader::makeLoaderSourcesScript( array( $id1 => $loadUrl, $id2 => $loadUrl, ... ) ); * Register sources with the given IDs and properties. * * @param string $id Source ID * @param array $properties Source properties (see addSource()) * @return string */ public static function makeLoaderSourcesScript( $id, $properties = null ) { if ( is_array( $id ) ) { return Xml::encodeJsCall( 'mw.loader.addSource', array( $id ), ResourceLoader::inDebugMode() ); } else { return Xml::encodeJsCall( 'mw.loader.addSource', array( $id, $properties ), ResourceLoader::inDebugMode() ); } } /** * Returns JS code which runs given JS code if the client-side framework is * present. * * @param string $script JavaScript code * @return string */ public static function makeLoaderConditionalScript( $script ) { return "if(window.mw){\n" . trim( $script ) . "\n}"; } /** * Returns JS code which will set the MediaWiki configuration array to * the given value. * * @param array $configuration List of configuration values keyed by variable name * @return string */ public static function makeConfigSetScript( array $configuration ) { return Xml::encodeJsCall( 'mw.config.set', array( $configuration ), ResourceLoader::inDebugMode() ); } /** * Convert an array of module names to a packed query string. * * For example, array( 'foo.bar', 'foo.baz', 'bar.baz', 'bar.quux' ) * becomes 'foo.bar,baz|bar.baz,quux' * @param array $modules List of module names (strings) * @return string Packed query string */ public static function makePackedModulesString( $modules ) { $groups = array(); // array( prefix => array( suffixes ) ) foreach ( $modules as $module ) { $pos = strrpos( $module, '.' ); $prefix = $pos === false ? '' : substr( $module, 0, $pos ); $suffix = $pos === false ? $module : substr( $module, $pos + 1 ); $groups[$prefix][] = $suffix; } $arr = array(); foreach ( $groups as $prefix => $suffixes ) { $p = $prefix === '' ? '' : $prefix . '.'; $arr[] = $p . implode( ',', $suffixes ); } $str = implode( '|', $arr ); return $str; } /** * Determine whether debug mode was requested * Order of priority is 1) request param, 2) cookie, 3) $wg setting * @return bool */ public static function inDebugMode() { if ( self::$debugMode === null ) { global $wgRequest, $wgResourceLoaderDebug; self::$debugMode = $wgRequest->getFuzzyBool( 'debug', $wgRequest->getCookie( 'resourceLoaderDebug', '', $wgResourceLoaderDebug ) ); } return self::$debugMode; } /** * Reset static members used for caching. * * Global state and $wgRequest are evil, but we're using it right * now and sometimes we need to be able to force ResourceLoader to * re-evaluate the context because it has changed (e.g. in the test suite). */ public static function clearCache() { self::$debugMode = null; } /** * Build a load.php URL * * @since 1.24 * @param string $source Name of the ResourceLoader source * @param ResourceLoaderContext $context * @param array $extraQuery * @return string URL to load.php. May be protocol-relative (if $wgLoadScript is procol-relative) */ public function createLoaderURL( $source, ResourceLoaderContext $context, $extraQuery = array() ) { $query = self::createLoaderQuery( $context, $extraQuery ); $script = $this->getLoadScript( $source ); // Prevent the IE6 extension check from being triggered (bug 28840) // by appending a character that's invalid in Windows extensions ('*') return wfExpandUrl( wfAppendQuery( $script, $query ) . '&*', PROTO_RELATIVE ); } /** * Build a load.php URL * @deprecated since 1.24, use createLoaderURL instead * @param array $modules Array of module names (strings) * @param string $lang Language code * @param string $skin Skin name * @param string|null $user User name. If null, the &user= parameter is omitted * @param string|null $version Versioning timestamp * @param bool $debug Whether the request should be in debug mode * @param string|null $only &only= parameter * @param bool $printable Printable mode * @param bool $handheld Handheld mode * @param array $extraQuery Extra query parameters to add * @return string URL to load.php. May be protocol-relative (if $wgLoadScript is procol-relative) */ public static function makeLoaderURL( $modules, $lang, $skin, $user = null, $version = null, $debug = false, $only = null, $printable = false, $handheld = false, $extraQuery = array() ) { global $wgLoadScript; $query = self::makeLoaderQuery( $modules, $lang, $skin, $user, $version, $debug, $only, $printable, $handheld, $extraQuery ); // Prevent the IE6 extension check from being triggered (bug 28840) // by appending a character that's invalid in Windows extensions ('*') return wfExpandUrl( wfAppendQuery( $wgLoadScript, $query ) . '&*', PROTO_RELATIVE ); } /** * Helper for createLoaderURL() * * @since 1.24 * @see makeLoaderQuery * @param ResourceLoaderContext $context * @param array $extraQuery * @return array */ public static function createLoaderQuery( ResourceLoaderContext $context, $extraQuery = array() ) { return self::makeLoaderQuery( $context->getModules(), $context->getLanguage(), $context->getSkin(), $context->getUser(), $context->getVersion(), $context->getDebug(), $context->getOnly(), $context->getRequest()->getBool( 'printable' ), $context->getRequest()->getBool( 'handheld' ), $extraQuery ); } /** * Build a query array (array representation of query string) for load.php. Helper * function for makeLoaderURL(). * * @param array $modules * @param string $lang * @param string $skin * @param string $user * @param string $version * @param bool $debug * @param string $only * @param bool $printable * @param bool $handheld * @param array $extraQuery * * @return array */ public static function makeLoaderQuery( $modules, $lang, $skin, $user = null, $version = null, $debug = false, $only = null, $printable = false, $handheld = false, $extraQuery = array() ) { $query = array( 'modules' => self::makePackedModulesString( $modules ), 'lang' => $lang, 'skin' => $skin, 'debug' => $debug ? 'true' : 'false', ); if ( $user !== null ) { $query['user'] = $user; } if ( $version !== null ) { $query['version'] = $version; } if ( $only !== null ) { $query['only'] = $only; } if ( $printable ) { $query['printable'] = 1; } if ( $handheld ) { $query['handheld'] = 1; } $query += $extraQuery; // Make queries uniform in order ksort( $query ); return $query; } /** * Check a module name for validity. * * Module names may not contain pipes (|), commas (,) or exclamation marks (!) and can be * at most 255 bytes. * * @param string $moduleName Module name to check * @return bool Whether $moduleName is a valid module name */ public static function isValidModuleName( $moduleName ) { return !preg_match( '/[|,!]/', $moduleName ) && strlen( $moduleName ) <= 255; } /** * Returns LESS compiler set up for use with MediaWiki * * @param Config $config * @throws MWException * @since 1.22 * @return lessc */ public static function getLessCompiler( Config $config ) { // When called from the installer, it is possible that a required PHP extension // is missing (at least for now; see bug 47564). If this is the case, throw an // exception (caught by the installer) to prevent a fatal error later on. if ( !class_exists( 'lessc' ) ) { throw new MWException( 'MediaWiki requires the lessphp compiler' ); } if ( !function_exists( 'ctype_digit' ) ) { throw new MWException( 'lessc requires the Ctype extension' ); } $less = new lessc(); $less->setPreserveComments( true ); $less->setVariables( self::getLessVars( $config ) ); $less->setImportDir( $config->get( 'ResourceLoaderLESSImportPaths' ) ); foreach ( $config->get( 'ResourceLoaderLESSFunctions' ) as $name => $func ) { $less->registerFunction( $name, $func ); } return $less; } /** * Get global LESS variables. * * @param Config $config * @since 1.22 * @return array Map of variable names to string CSS values. */ public static function getLessVars( Config $config ) { if ( !self::$lessVars ) { $lessVars = $config->get( 'ResourceLoaderLESSVars' ); Hooks::run( 'ResourceLoaderGetLessVars', array( &$lessVars ) ); // Sort by key to ensure consistent hashing for cache lookups. ksort( $lessVars ); self::$lessVars = $lessVars; } return self::$lessVars; } }