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<?php
/**
* Clean up broken, unparseable upload filenames.
*
* Copyright © 2005-2006 Brooke Vibber <bvibber@wikimedia.org>
* https://www.mediawiki.org/
*
* 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
* @author Brooke Vibber <bvibber@wikimedia.org>
* @ingroup Maintenance
*/
use MediaWiki\FileRepo\LocalRepo;
use MediaWiki\Parser\Sanitizer;
use MediaWiki\Title\Title;
use Wikimedia\Rdbms\IReadableDatabase;
// @codeCoverageIgnoreStart
require_once __DIR__ . '/TableCleanup.php';
// @codeCoverageIgnoreEnd
/**
* Maintenance script to clean up broken, unparseable upload filenames.
*
* @ingroup Maintenance
*/
class CleanupImages extends TableCleanup {
/** @inheritDoc */
protected $defaultParams = [
'table' => 'image',
'conds' => [],
'index' => 'img_name',
'callback' => 'processRow',
];
/** @var LocalRepo|null */
private $repo;
public function __construct() {
parent::__construct();
$this->addDescription( 'Script to clean up broken, unparseable upload filenames' );
}
protected function processRow( \stdClass $row ) {
$source = $row->img_name;
if ( $source == '' ) {
// Ye olde empty rows. Just kill them.
$this->killRow( $source );
$this->progress( 1 );
return;
}
$cleaned = $source;
// About half of old bad image names have percent-codes
$cleaned = rawurldecode( $cleaned );
// We also have some HTML entities there
$cleaned = Sanitizer::decodeCharReferences( $cleaned );
$contLang = $this->getServiceContainer()->getContentLanguage();
// Some are old latin-1
$cleaned = $contLang->checkTitleEncoding( $cleaned );
// Many of remainder look like non-normalized unicode
$cleaned = $contLang->normalize( $cleaned );
$title = Title::makeTitleSafe( NS_FILE, $cleaned );
if ( $title === null ) {
$this->output( "page $source ($cleaned) is illegal.\n" );
$safe = $this->buildSafeTitle( $cleaned );
if ( $safe === false ) {
$this->progress( 0 );
return;
}
$this->pokeFile( $source, $safe );
$this->progress( 1 );
return;
}
if ( $title->getDBkey() !== $source ) {
$munged = $title->getDBkey();
$this->output( "page $source ($munged) doesn't match self.\n" );
$this->pokeFile( $source, $munged );
$this->progress( 1 );
return;
}
$this->progress( 0 );
}
/**
* @param string $name
*/
private function killRow( $name ) {
if ( $this->dryrun ) {
$this->output( "DRY RUN: would delete bogus row '$name'\n" );
} else {
$this->output( "deleting bogus row '$name'\n" );
$db = $this->getPrimaryDB();
$db->newDeleteQueryBuilder()
->deleteFrom( 'image' )
->where( [ 'img_name' => $name ] )
->caller( __METHOD__ )
->execute();
}
}
/**
* @param string $name
* @return string
*/
private function filePath( $name ) {
if ( $this->repo === null ) {
$this->repo = $this->getServiceContainer()->getRepoGroup()->getLocalRepo();
}
return $this->repo->getRootDirectory() . '/' . $this->repo->getHashPath( $name ) . $name;
}
private function imageExists( string $name, IReadableDatabase $db ): bool {
return (bool)$db->newSelectQueryBuilder()
->select( '1' )
->from( 'image' )
->where( [ 'img_name' => $name ] )
->caller( __METHOD__ )
->fetchField();
}
private function pageExists( string $name, IReadableDatabase $db ): bool {
return (bool)$db->newSelectQueryBuilder()
->select( '1' )
->from( 'page' )
->where( [
'page_namespace' => NS_FILE,
'page_title' => $name,
] )
->caller( __METHOD__ )
->fetchField();
}
private function pokeFile( string $orig, string $new ) {
$path = $this->filePath( $orig );
if ( !file_exists( $path ) ) {
$this->output( "missing file: $path\n" );
$this->killRow( $orig );
return;
}
$db = $this->getPrimaryDB();
/*
* To prevent key collisions in the update() statements below,
* if the target title exists in the image table, or if both the
* original and target titles exist in the page table, append
* increasing version numbers until the target title exists in
* neither. (See also T18916.)
*/
$version = 0;
$final = $new;
$conflict = ( $this->imageExists( $final, $db ) ||
( $this->pageExists( $orig, $db ) && $this->pageExists( $final, $db ) ) );
while ( $conflict ) {
$this->output( "Rename conflicts with '$final'...\n" );
$version++;
$final = $this->appendTitle( $new, "_$version" );
$conflict = ( $this->imageExists( $final, $db ) || $this->pageExists( $final, $db ) );
}
$finalPath = $this->filePath( $final );
if ( $this->dryrun ) {
$this->output( "DRY RUN: would rename $path to $finalPath\n" );
} else {
$this->output( "renaming $path to $finalPath\n" );
// @todo FIXME: Should this use File::move()?
$this->beginTransaction( $db, __METHOD__ );
$db->newUpdateQueryBuilder()
->update( 'image' )
->set( [ 'img_name' => $final ] )
->where( [ 'img_name' => $orig ] )
->caller( __METHOD__ )
->execute();
$db->newUpdateQueryBuilder()
->update( 'oldimage' )
->set( [ 'oi_name' => $final ] )
->where( [ 'oi_name' => $orig ] )
->caller( __METHOD__ )
->execute();
$db->newUpdateQueryBuilder()
->update( 'page' )
->set( [ 'page_title' => $final ] )
->where( [ 'page_title' => $orig, 'page_namespace' => NS_FILE ] )
->caller( __METHOD__ )
->execute();
$dir = dirname( $finalPath );
if ( !file_exists( $dir ) ) {
if ( !wfMkdirParents( $dir, null, __METHOD__ ) ) {
$this->output( "RENAME FAILED, COULD NOT CREATE $dir" );
$this->rollbackTransaction( $db, __METHOD__ );
return;
}
}
if ( rename( $path, $finalPath ) ) {
$this->commitTransaction( $db, __METHOD__ );
} else {
$this->error( "RENAME FAILED" );
$this->rollbackTransaction( $db, __METHOD__ );
}
}
}
private function appendTitle( string $name, string $suffix ): string {
return preg_replace( '/^(.*)(\..*?)$/',
"\\1$suffix\\2", $name );
}
/** @return string|false */
private function buildSafeTitle( string $name ) {
$x = preg_replace_callback(
'/([^' . Title::legalChars() . ']|~)/',
[ $this, 'hexChar' ],
$name );
$test = Title::makeTitleSafe( NS_FILE, $x );
if ( $test === null || $test->getDBkey() !== $x ) {
$this->error( "Unable to generate safe title from '$name', got '$x'" );
return false;
}
return $x;
}
}
// @codeCoverageIgnoreStart
$maintClass = CleanupImages::class;
require_once RUN_MAINTENANCE_IF_MAIN;
// @codeCoverageIgnoreEnd