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<?php
/**
* Entry point implementation for automatically generating missing media thumbnails
* on the fly.
*
* @see \MediaWiki\FileRepo\ThumbnailEntryPoint
* @see /thumb.php The web entry point.
*
* 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 entrypoint
* @ingroup Media
*/
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 ( substr( $baseUrl, 0, 1 ) === '/' ) {
$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
}
/**
* 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 following 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 extractThumbParams().
*
* @param string $thumbRel Thumbnail path relative to the thumb zone
*
* @return array|null Associative params array or null
*/
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;
}
}
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