| <?php |
| /** |
| * PHP script to stream out an image thumbnail. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write to the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| * http://www.gnu.org/copyleft/gpl.html |
| * |
| * @file |
| * @ingroup Media |
| */ |
| |
| use MediaWiki\Logger\LoggerFactory; |
| use MediaWiki\MediaWikiServices; |
| |
| define( 'MW_NO_OUTPUT_COMPRESSION', 1 ); |
| require __DIR__ . '/includes/WebStart.php'; |
| |
| // Don't use fancy MIME detection, just check the file extension for jpg/gif/png |
| $wgTrivialMimeDetection = true; |
| |
| if ( defined( 'THUMB_HANDLER' ) ) { |
| // Called from thumb_handler.php via 404; extract params from the URI... |
| wfThumbHandle404(); |
| } else { |
| // Called directly, use $_GET params |
| wfStreamThumb( $wgRequest->getQueryValues() ); |
| } |
| |
| $mediawiki = new MediaWiki(); |
| $mediawiki->doPostOutputShutdown( 'fast' ); |
| |
| // -------------------------------------------------------------------------- |
| |
| /** |
| * Handle a thumbnail request via thumbnail file URL |
| * |
| * @return void |
| */ |
| function wfThumbHandle404() { |
| global $wgArticlePath; |
| |
| # Set action base paths so that WebRequest::getPathInfo() |
| # recognizes the "X" as the 'title' in ../thumb_handler.php/X urls. |
| # Note: If Custom per-extension repo paths are set, this may break. |
| $repo = RepoGroup::singleton()->getLocalRepo(); |
| $oldArticlePath = $wgArticlePath; |
| $wgArticlePath = $repo->getZoneUrl( 'thumb' ) . '/$1'; |
| |
| $matches = WebRequest::getPathInfo(); |
| |
| $wgArticlePath = $oldArticlePath; |
| |
| if ( !isset( $matches['title'] ) ) { |
| wfThumbError( 404, 'Could not determine the name of the requested thumbnail.' ); |
| return; |
| } |
| |
| $params = wfExtractThumbRequestInfo( $matches['title'] ); // basic wiki URL param extracting |
| if ( $params == null ) { |
| wfThumbError( 400, 'The specified thumbnail parameters are not recognized.' ); |
| return; |
| } |
| |
| wfStreamThumb( $params ); // stream the thumbnail |
| } |
| |
| /** |
| * Stream a thumbnail specified by parameters |
| * |
| * @param array $params List of thumbnailing parameters. In addition to parameters |
| * passed to the MediaHandler, this may also includes the keys: |
| * f (for filename), archived (if archived file), temp (if temp file), |
| * w (alias for width), p (alias for page), r (ignored; historical), |
| * rel404 (path for render on 404 to verify hash path correct), |
| * thumbName (thumbnail name to potentially extract more parameters from |
| * e.g. 'lossy-page1-120px-Foo.tiff' would add page, lossy and width |
| * to the parameters) |
| * @return void |
| */ |
| function wfStreamThumb( array $params ) { |
| global $wgVaryOnXFP; |
| |
| $headers = []; // HTTP headers to send |
| |
| $fileName = $params['f'] ?? ''; |
| |
| // Backwards compatibility parameters |
| if ( isset( $params['w'] ) ) { |
| $params['width'] = $params['w']; |
| unset( $params['w'] ); |
| } |
| if ( isset( $params['width'] ) && substr( $params['width'], -2 ) == 'px' ) { |
| // strip the px (pixel) suffix, if found |
| $params['width'] = substr( $params['width'], 0, -2 ); |
| } |
| if ( isset( $params['p'] ) ) { |
| $params['page'] = $params['p']; |
| } |
| |
| // Is this a thumb of an archived file? |
| $isOld = ( isset( $params['archived'] ) && $params['archived'] ); |
| unset( $params['archived'] ); // handlers don't care |
| |
| // Is this a thumb of a temp file? |
| $isTemp = ( isset( $params['temp'] ) && $params['temp'] ); |
| unset( $params['temp'] ); // handlers don't care |
| |
| // Some basic input validation |
| $fileName = strtr( $fileName, '\\/', '__' ); |
| |
| // Actually fetch the image. Method depends on whether it is archived or not. |
| if ( $isTemp ) { |
| $repo = RepoGroup::singleton()->getLocalRepo()->getTempRepo(); |
| $img = new UnregisteredLocalFile( null, $repo, |
| # Temp files are hashed based on the name without the timestamp. |
| # The thumbnails will be hashed based on the entire name however. |
| # @todo fix this convention to actually be reasonable. |
| $repo->getZonePath( 'public' ) . '/' . $repo->getTempHashPath( $fileName ) . $fileName |
| ); |
| } elseif ( $isOld ) { |
| // Format is <timestamp>!<name> |
| $bits = explode( '!', $fileName, 2 ); |
| if ( count( $bits ) != 2 ) { |
| wfThumbError( 404, wfMessage( 'badtitletext' )->parse() ); |
| return; |
| } |
| $title = Title::makeTitleSafe( NS_FILE, $bits[1] ); |
| if ( !$title ) { |
| wfThumbError( 404, wfMessage( 'badtitletext' )->parse() ); |
| return; |
| } |
| $img = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $title, $fileName ); |
| } else { |
| $img = wfLocalFile( $fileName ); |
| } |
| |
| // Check the source file title |
| if ( !$img ) { |
| wfThumbError( 404, wfMessage( 'badtitletext' )->parse() ); |
| return; |
| } |
| |
| // Check permissions if there are read restrictions |
| $varyHeader = []; |
| if ( !in_array( 'read', User::getGroupPermissions( [ '*' ] ), true ) ) { |
| if ( !$img->getTitle() || !$img->getTitle()->userCan( 'read' ) ) { |
| wfThumbError( 403, 'Access denied. You do not have permission to access ' . |
| 'the source file.' ); |
| return; |
| } |
| $headers[] = 'Cache-Control: private'; |
| $varyHeader[] = 'Cookie'; |
| } |
| |
| // Check if the file is hidden |
| if ( $img->isDeleted( File::DELETED_FILE ) ) { |
| wfThumbErrorText( 404, "The source file '$fileName' does not exist." ); |
| return; |
| } |
| |
| // Do rendering parameters extraction from thumbnail name. |
| if ( isset( $params['thumbName'] ) ) { |
| $params = wfExtractThumbParams( $img, $params ); |
| } |
| if ( $params == null ) { |
| wfThumbError( 400, 'The specified thumbnail parameters are not recognized.' ); |
| return; |
| } |
| |
| // Check the source file storage path |
| if ( !$img->exists() ) { |
| $redirectedLocation = false; |
| if ( !$isTemp ) { |
| // Check for file redirect |
| // Since redirects are associated with pages, not versions of files, |
| // we look for the most current version to see if its a redirect. |
| $possRedirFile = RepoGroup::singleton()->getLocalRepo()->findFile( $img->getName() ); |
| if ( $possRedirFile && !is_null( $possRedirFile->getRedirected() ) ) { |
| $redirTarget = $possRedirFile->getName(); |
| $targetFile = wfLocalFile( Title::makeTitleSafe( NS_FILE, $redirTarget ) ); |
| if ( $targetFile->exists() ) { |
| $newThumbName = $targetFile->thumbName( $params ); |
| if ( $isOld ) { |
| /** @var array $bits */ |
| $newThumbUrl = $targetFile->getArchiveThumbUrl( |
| $bits[0] . '!' . $targetFile->getName(), $newThumbName ); |
| } else { |
| $newThumbUrl = $targetFile->getThumbUrl( $newThumbName ); |
| } |
| $redirectedLocation = wfExpandUrl( $newThumbUrl, PROTO_CURRENT ); |
| } |
| } |
| } |
| |
| if ( $redirectedLocation ) { |
| // File has been moved. Give redirect. |
| $response = RequestContext::getMain()->getRequest()->response(); |
| $response->statusHeader( 302 ); |
| $response->header( 'Location: ' . $redirectedLocation ); |
| $response->header( 'Expires: ' . |
| gmdate( 'D, d M Y H:i:s', time() + 12 * 3600 ) . ' GMT' ); |
| if ( $wgVaryOnXFP ) { |
| $varyHeader[] = 'X-Forwarded-Proto'; |
| } |
| if ( count( $varyHeader ) ) { |
| $response->header( 'Vary: ' . implode( ', ', $varyHeader ) ); |
| } |
| $response->header( 'Content-Length: 0' ); |
| return; |
| } |
| |
| // If its not a redirect that has a target as a local file, give 404. |
| wfThumbErrorText( 404, "The source file '$fileName' does not exist." ); |
| return; |
| } elseif ( $img->getPath() === false ) { |
| wfThumbErrorText( 400, "The source file '$fileName' is not locally accessible." ); |
| return; |
| } |
| |
| // Check IMS against the source file |
| // This means that clients can keep a cached copy even after it has been deleted on the server |
| if ( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) { |
| // Fix IE brokenness |
| $imsString = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] ); |
| // Calculate time |
| Wikimedia\suppressWarnings(); |
| $imsUnix = strtotime( $imsString ); |
| Wikimedia\restoreWarnings(); |
| if ( wfTimestamp( TS_UNIX, $img->getTimestamp() ) <= $imsUnix ) { |
| HttpStatus::header( 304 ); |
| return; |
| } |
| } |
| |
| $rel404 = $params['rel404'] ?? null; |
| unset( $params['r'] ); // ignore 'r' because we unconditionally pass File::RENDER |
| unset( $params['f'] ); // We're done with 'f' parameter. |
| unset( $params['rel404'] ); // moved to $rel404 |
| |
| // Get the normalized thumbnail name from the parameters... |
| try { |
| $thumbName = $img->thumbName( $params ); |
| if ( !strlen( $thumbName ) ) { // invalid params? |
| throw new MediaTransformInvalidParametersException( |
| 'Empty return from File::thumbName' |
| ); |
| } |
| $thumbName2 = $img->thumbName( $params, File::THUMB_FULL_NAME ); // b/c; "long" style |
| } catch ( MediaTransformInvalidParametersException $e ) { |
| wfThumbError( |
| 400, |
| 'The specified thumbnail parameters are not valid: ' . $e->getMessage() |
| ); |
| return; |
| } catch ( MWException $e ) { |
| wfThumbError( 500, $e->getHTML(), 'Exception caught while extracting thumb name', |
| [ 'exception' => $e ] ); |
| return; |
| } |
| |
| // For 404 handled thumbnails, we only use the base name of the URI |
| // for the thumb params and the parent directory for the source file name. |
| // Check that the zone relative path matches up so squid caches won't pick |
| // up thumbs that would not be purged on source file deletion (T36231). |
| if ( $rel404 !== null ) { // thumbnail was handled via 404 |
| if ( rawurldecode( $rel404 ) === $img->getThumbRel( $thumbName ) ) { |
| // Request for the canonical thumbnail name |
| } elseif ( rawurldecode( $rel404 ) === $img->getThumbRel( $thumbName2 ) ) { |
| // Request for the "long" thumbnail name; redirect to canonical name |
| $response = RequestContext::getMain()->getRequest()->response(); |
| $response->statusHeader( 301 ); |
| $response->header( 'Location: ' . |
| wfExpandUrl( $img->getThumbUrl( $thumbName ), PROTO_CURRENT ) ); |
| $response->header( 'Expires: ' . |
| gmdate( 'D, d M Y H:i:s', time() + 7 * 86400 ) . ' GMT' ); |
| if ( $wgVaryOnXFP ) { |
| $varyHeader[] = 'X-Forwarded-Proto'; |
| } |
| if ( count( $varyHeader ) ) { |
| $response->header( 'Vary: ' . implode( ', ', $varyHeader ) ); |
| } |
| return; |
| } else { |
| wfThumbErrorText( 404, "The given path of the specified thumbnail is incorrect; |
| expected '" . $img->getThumbRel( $thumbName ) . "' but got '" . |
| rawurldecode( $rel404 ) . "'." ); |
| return; |
| } |
| } |
| |
| $dispositionType = isset( $params['download'] ) ? 'attachment' : 'inline'; |
| |
| // Suggest a good name for users downloading this thumbnail |
| $headers[] = |
| "Content-Disposition: {$img->getThumbDisposition( $thumbName, $dispositionType )}"; |
| |
| if ( count( $varyHeader ) ) { |
| $headers[] = 'Vary: ' . implode( ', ', $varyHeader ); |
| } |
| |
| // Stream the file if it exists already... |
| $thumbPath = $img->getThumbPath( $thumbName ); |
| if ( $img->getRepo()->fileExists( $thumbPath ) ) { |
| $starttime = microtime( true ); |
| $status = $img->getRepo()->streamFileWithStatus( $thumbPath, $headers ); |
| $streamtime = microtime( true ) - $starttime; |
| |
| if ( $status->isOK() ) { |
| MediaWikiServices::getInstance()->getStatsdDataFactory()->timing( |
| 'media.thumbnail.stream', $streamtime |
| ); |
| } else { |
| wfThumbError( 500, 'Could not stream the file', null, [ 'file' => $thumbName, |
| 'path' => $thumbPath, 'error' => $status->getWikiText( false, false, 'en' ) ] ); |
| } |
| return; |
| } |
| |
| $user = RequestContext::getMain()->getUser(); |
| if ( !wfThumbIsStandard( $img, $params ) && $user->pingLimiter( 'renderfile-nonstandard' ) ) { |
| wfThumbError( 429, wfMessage( 'actionthrottledtext' )->parse() ); |
| return; |
| } elseif ( $user->pingLimiter( 'renderfile' ) ) { |
| wfThumbError( 429, wfMessage( 'actionthrottledtext' )->parse() ); |
| return; |
| } |
| |
| $thumbProxyUrl = $img->getRepo()->getThumbProxyUrl(); |
| |
| if ( strlen( $thumbProxyUrl ) ) { |
| wfProxyThumbnailRequest( $img, $thumbName ); |
| // No local fallback when in proxy mode |
| return; |
| } else { |
| // Generate the thumbnail locally |
| list( $thumb, $errorMsg ) = wfGenerateThumbnail( $img, $params, $thumbName, $thumbPath ); |
| } |
| |
| /** @var MediaTransformOutput|MediaTransformError|bool $thumb */ |
| |
| // Check for thumbnail generation errors... |
| $msg = wfMessage( 'thumbnail_error' ); |
| $errorCode = 500; |
| |
| if ( !$thumb ) { |
| $errorMsg = $errorMsg ?: $msg->rawParams( 'File::transform() returned false' )->escaped(); |
| if ( $errorMsg instanceof MessageSpecifier && |
| $errorMsg->getKey() === 'thumbnail_image-failure-limit' |
| ) { |
| $errorCode = 429; |
| } |
| } elseif ( $thumb->isError() ) { |
| $errorMsg = $thumb->getHtmlMsg(); |
| $errorCode = $thumb->getHttpStatusCode(); |
| } elseif ( !$thumb->hasFile() ) { |
| $errorMsg = $msg->rawParams( 'No path supplied in thumbnail object' )->escaped(); |
| } elseif ( $thumb->fileIsSource() ) { |
| $errorMsg = $msg |
| ->rawParams( 'Image was not scaled, is the requested width bigger than the source?' ) |
| ->escaped(); |
| $errorCode = 400; |
| } |
| |
| if ( $errorMsg !== false ) { |
| wfThumbError( $errorCode, $errorMsg, null, [ 'file' => $thumbName, 'path' => $thumbPath ] ); |
| } else { |
| // Stream the file if there were no errors |
| $status = $thumb->streamFileWithStatus( $headers ); |
| if ( !$status->isOK() ) { |
| wfThumbError( 500, 'Could not stream the file', null, [ |
| 'file' => $thumbName, 'path' => $thumbPath, |
| 'error' => $status->getWikiText( false, false, 'en' ) ] ); |
| } |
| } |
| } |
| |
| /** |
| * Proxies thumbnail request to a service that handles thumbnailing |
| * |
| * @param File $img |
| * @param string $thumbName |
| */ |
| function wfProxyThumbnailRequest( $img, $thumbName ) { |
| $thumbProxyUrl = $img->getRepo()->getThumbProxyUrl(); |
| |
| // Instead of generating the thumbnail ourselves, we proxy the request to another service |
| $thumbProxiedUrl = $thumbProxyUrl . $img->getThumbRel( $thumbName ); |
| |
| $req = MWHttpRequest::factory( $thumbProxiedUrl ); |
| $secret = $img->getRepo()->getThumbProxySecret(); |
| |
| // Pass a secret key shared with the proxied service if any |
| if ( strlen( $secret ) ) { |
| $req->setHeader( 'X-Swift-Secret', $secret ); |
| } |
| |
| // Send request to proxied service |
| $status = $req->execute(); |
| |
| // Simply serve the response from the proxied service as-is |
| header( 'HTTP/1.1 ' . $req->getStatus() ); |
| |
| $headers = $req->getResponseHeaders(); |
| |
| foreach ( $headers as $key => $values ) { |
| foreach ( $values as $value ) { |
| header( $key . ': ' . $value, false ); |
| } |
| } |
| |
| echo $req->getContent(); |
| } |
| |
| /** |
| * Actually try to generate a new thumbnail |
| * |
| * @param File $file |
| * @param array $params |
| * @param string $thumbName |
| * @param string $thumbPath |
| * @return array (MediaTransformOutput|bool, string|bool error message HTML) |
| */ |
| function wfGenerateThumbnail( File $file, array $params, $thumbName, $thumbPath ) { |
| global $wgAttemptFailureEpoch; |
| |
| $cache = ObjectCache::getLocalClusterInstance(); |
| $key = $cache->makeKey( |
| 'attempt-failures', |
| $wgAttemptFailureEpoch, |
| $file->getRepo()->getName(), |
| $file->getSha1(), |
| md5( $thumbName ) |
| ); |
| |
| // Check if this file keeps failing to render |
| if ( $cache->get( $key ) >= 4 ) { |
| return [ false, wfMessage( 'thumbnail_image-failure-limit', 4 ) ]; |
| } |
| |
| $done = false; |
| // Record failures on PHP fatals in addition to caching exceptions |
| register_shutdown_function( function () use ( $cache, &$done, $key ) { |
| if ( !$done ) { // transform() gave a fatal |
| // Randomize TTL to reduce stampedes |
| $cache->incrWithInit( $key, $cache::TTL_HOUR + mt_rand( 0, 300 ) ); |
| } |
| } ); |
| |
| $thumb = false; |
| $errorHtml = false; |
| |
| // guard thumbnail rendering with PoolCounter to avoid stampedes |
| // expensive files use a separate PoolCounter config so it is possible |
| // to set up a global limit on them |
| if ( $file->isExpensiveToThumbnail() ) { |
| $poolCounterType = 'FileRenderExpensive'; |
| } else { |
| $poolCounterType = 'FileRender'; |
| } |
| |
| // Thumbnail isn't already there, so create the new thumbnail... |
| try { |
| $work = new PoolCounterWorkViaCallback( $poolCounterType, sha1( $file->getName() ), |
| [ |
| 'doWork' => function () use ( $file, $params ) { |
| return $file->transform( $params, File::RENDER_NOW ); |
| }, |
| 'doCachedWork' => function () use ( $file, $params, $thumbPath ) { |
| // If the worker that finished made this thumbnail then use it. |
| // Otherwise, it probably made a different thumbnail for this file. |
| return $file->getRepo()->fileExists( $thumbPath ) |
| ? $file->transform( $params, File::RENDER_NOW ) |
| : false; // retry once more in exclusive mode |
| }, |
| 'error' => function ( Status $status ) { |
| return wfMessage( 'generic-pool-error' )->parse() . '<hr>' . $status->getHTML(); |
| } |
| ] |
| ); |
| $result = $work->execute(); |
| if ( $result instanceof MediaTransformOutput ) { |
| $thumb = $result; |
| } elseif ( is_string( $result ) ) { // error |
| $errorHtml = $result; |
| } |
| } catch ( Exception $e ) { |
| // Tried to select a page on a non-paged file? |
| } |
| |
| /** @noinspection PhpUnusedLocalVariableInspection */ |
| $done = true; // no PHP fatal occurred |
| |
| if ( !$thumb || $thumb->isError() ) { |
| // Randomize TTL to reduce stampedes |
| $cache->incrWithInit( $key, $cache::TTL_HOUR + mt_rand( 0, 300 ) ); |
| } |
| |
| return [ $thumb, $errorHtml ]; |
| } |
| |
| /** |
| * Convert pathinfo type parameter, into normal request parameters |
| * |
| * So for example, if the request was redirected from |
| * /w/images/thumb/a/ab/Foo.png/120px-Foo.png. The $thumbRel parameter |
| * of this function would be set to "a/ab/Foo.png/120px-Foo.png". |
| * This method is responsible for turning that into an array |
| * with the folowing keys: |
| * * f => the filename (Foo.png) |
| * * rel404 => the whole thing (a/ab/Foo.png/120px-Foo.png) |
| * * archived => 1 (If the request is for an archived thumb) |
| * * temp => 1 (If the file is in the "temporary" zone) |
| * * thumbName => the thumbnail name, including parameters (120px-Foo.png) |
| * |
| * Transform specific parameters are set later via wfExtractThumbParams(). |
| * |
| * @param string $thumbRel Thumbnail path relative to the thumb zone |
| * @return array|null Associative params array or null |
| */ |
| function wfExtractThumbRequestInfo( $thumbRel ) { |
| $repo = RepoGroup::singleton()->getLocalRepo(); |
| |
| $hashDirReg = $subdirReg = ''; |
| $hashLevels = $repo->getHashLevels(); |
| for ( $i = 0; $i < $hashLevels; $i++ ) { |
| $subdirReg .= '[0-9a-f]'; |
| $hashDirReg .= "$subdirReg/"; |
| } |
| |
| // Check if this is a thumbnail of an original in the local file repo |
| if ( preg_match( "!^((archive/)?$hashDirReg([^/]*)/([^/]*))$!", $thumbRel, $m ) ) { |
| list( /*all*/, $rel, $archOrTemp, $filename, $thumbname ) = $m; |
| // Check if this is a thumbnail of an temp file in the local file repo |
| } elseif ( preg_match( "!^(temp/)($hashDirReg([^/]*)/([^/]*))$!", $thumbRel, $m ) ) { |
| list( /*all*/, $archOrTemp, $rel, $filename, $thumbname ) = $m; |
| } else { |
| return null; // not a valid looking thumbnail request |
| } |
| |
| $params = [ 'f' => $filename, 'rel404' => $rel ]; |
| if ( $archOrTemp === 'archive/' ) { |
| $params['archived'] = 1; |
| } elseif ( $archOrTemp === 'temp/' ) { |
| $params['temp'] = 1; |
| } |
| |
| $params['thumbName'] = $thumbname; |
| return $params; |
| } |
| |
| /** |
| * Convert a thumbnail name (122px-foo.png) to parameters, using |
| * file handler. |
| * |
| * @param File $file File object for file in question |
| * @param array $params Array of parameters so far |
| * @return array Parameters array with more parameters |
| */ |
| function wfExtractThumbParams( $file, $params ) { |
| if ( !isset( $params['thumbName'] ) ) { |
| throw new InvalidArgumentException( "No thumbnail name passed to wfExtractThumbParams" ); |
| } |
| |
| $thumbname = $params['thumbName']; |
| unset( $params['thumbName'] ); |
| |
| // FIXME: Files in the temp zone don't set a MIME type, which means |
| // they don't have a handler. Which means we can't parse the param |
| // string. However, not a big issue as what good is a param string |
| // if you have no handler to make use of the param string and |
| // actually generate the thumbnail. |
| $handler = $file->getHandler(); |
| |
| // Based on UploadStash::parseKey |
| $fileNamePos = strrpos( $thumbname, $params['f'] ); |
| if ( $fileNamePos === false ) { |
| // Maybe using a short filename? (see FileRepo::nameForThumb) |
| $fileNamePos = strrpos( $thumbname, 'thumbnail' ); |
| } |
| |
| if ( $handler && $fileNamePos !== false ) { |
| $paramString = substr( $thumbname, 0, $fileNamePos - 1 ); |
| $extraParams = $handler->parseParamString( $paramString ); |
| if ( $extraParams !== false ) { |
| return $params + $extraParams; |
| } |
| } |
| |
| // As a last ditch fallback, use the traditional common parameters |
| if ( preg_match( '!^(page(\d*)-)*(\d*)px-[^/]*$!', $thumbname, $matches ) ) { |
| list( /* all */, /* pagefull */, $pagenum, $size ) = $matches; |
| $params['width'] = $size; |
| if ( $pagenum ) { |
| $params['page'] = $pagenum; |
| } |
| return $params; // valid thumbnail URL |
| } |
| return null; |
| } |
| |
| /** |
| * Output a thumbnail generation error message |
| * |
| * @param int $status |
| * @param string $msgText Plain text (will be html escaped) |
| * @return void |
| */ |
| function wfThumbErrorText( $status, $msgText ) { |
| wfThumbError( $status, htmlspecialchars( $msgText, ENT_NOQUOTES ) ); |
| } |
| |
| /** |
| * Output a thumbnail generation error message |
| * |
| * @param int $status |
| * @param string $msgHtml HTML |
| * @param string|null $msgText Short error description, for internal logging. Defaults to $msgHtml. |
| * Only used for HTTP 500 errors. |
| * @param array $context Error context, for internal logging. Only used for HTTP 500 errors. |
| * @return void |
| */ |
| function wfThumbError( $status, $msgHtml, $msgText = null, $context = [] ) { |
| global $wgShowHostnames; |
| |
| header( 'Cache-Control: no-cache' ); |
| header( 'Content-Type: text/html; charset=utf-8' ); |
| if ( $status == 400 || $status == 404 || $status == 429 ) { |
| HttpStatus::header( $status ); |
| } elseif ( $status == 403 ) { |
| HttpStatus::header( 403 ); |
| header( 'Vary: Cookie' ); |
| } else { |
| LoggerFactory::getInstance( 'thumb' )->error( $msgText ?: $msgHtml, $context ); |
| HttpStatus::header( 500 ); |
| } |
| if ( $wgShowHostnames ) { |
| header( 'X-MW-Thumbnail-Renderer: ' . wfHostname() ); |
| $url = htmlspecialchars( |
| $_SERVER['REQUEST_URI'] ?? '', |
| ENT_NOQUOTES |
| ); |
| $hostname = htmlspecialchars( wfHostname(), ENT_NOQUOTES ); |
| $debug = "<!-- $url -->\n<!-- $hostname -->\n"; |
| } else { |
| $debug = ''; |
| } |
| $content = <<<EOT |
| <!DOCTYPE html> |
| <html><head> |
| <meta charset="UTF-8" /> |
| <title>Error generating thumbnail</title> |
| </head> |
| <body> |
| <h1>Error generating thumbnail</h1> |
| <p> |
| $msgHtml |
| </p> |
| $debug |
| </body> |
| </html> |
| |
| EOT; |
| header( 'Content-Length: ' . strlen( $content ) ); |
| echo $content; |
| } |