Thumbnail404EntryPoint.php

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<?php
namespace MediaWiki\FileRepo;
 
use MediaWiki\MainConfigNames;
 
class Thumbnail404EntryPoint extends ThumbnailEntryPoint {
 
    protected function handleRequest() {
        $thumbPath = $this->getConfig( MainConfigNames::ThumbPath );
 
        if ( $thumbPath ) {
            $relPath = $this->getRequestPathSuffix( $thumbPath );
        } else {
            // Determine the request path relative to the thumbnail zone base
            $repo = $this->getServiceContainer()->getRepoGroup()->getLocalRepo();
            $baseUrl = $repo->getZoneUrl( 'thumb' );
            if ( str_starts_with( $baseUrl, '/' ) ) {
                $basePath = $baseUrl;
            } else {
                $basePath = parse_url( $baseUrl, PHP_URL_PATH );
            }
            $relPath = $this->getRequestPathSuffix( "$basePath" );
        }
 
        $params = $this->extractThumbRequestInfo( $relPath ); // basic wiki URL param extracting
        if ( $params == null ) {
            $this->thumbError( 400, 'The specified thumbnail parameters are not recognized.' );
            return;
        }
 
        $this->streamThumb( $params ); // stream the thumbnail
    }
 
    protected function extractThumbRequestInfo( $thumbRel ) {
        $repo = $this->getServiceContainer()->getRepoGroup()->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 ) ) {
            [ /*all*/, $rel, $archOrTemp, $filename, $thumbname ] = $m;
            // Check if this is a thumbnail of a temp file in the local file repo
        } elseif ( preg_match( "!^(temp/)($hashDirReg([^/]*)/([^/]*))$!", $thumbRel, $m ) ) {
            [ /*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;
    }
 
}