includes/filerepo/LocalRepo.php

   1 <?php
   2 /**
   3  * A repository that stores files in the local filesystem and registers them
   4  * in the wiki's own database. This is the most commonly used repository class.
   5  */
   6 class LocalRepo extends FSRepo {
   7         var $fileFactory = array( 'LocalFile', 'newFromTitle' );
   8         var $oldFileFactory = array( 'OldLocalFile', 'newFromTitle' );
   9
  10         function getSlaveDB() {
  11                 return wfGetDB( DB_SLAVE );
  12         }
  13
  14         function getMasterDB() {
  15                 return wfGetDB( DB_MASTER );
  16         }
  17
  18         function newFileFromRow( $row ) {
  19                 if ( isset( $row->img_name ) ) {
  20                         return LocalFile::newFromRow( $row, $this );
  21                 } elseif ( isset( $row->oi_name ) ) {
  22                         return OldLocalFile::newFromRow( $row, $this );
  23                 } else {
  24                         throw new MWException( __METHOD__.': invalid row' );
  25                 }
  26         }
  27
  28         function newFromArchiveName( $title, $archiveName ) {
  29                 return OldLocalFile::newFromArchiveName( $title, $this, $archiveName );
  30         }
  31
  32         /**
  33          * Delete files in the deleted directory if they are not referenced in the
  34          * filearchive table. This needs to be done in the repo because it needs to
  35          * interleave database locks with file operations, which is potentially a
  36          * remote operation.
  37          * @return FileRepoStatus
  38          */
  39         function cleanupDeletedBatch( $storageKeys ) {
  40                 $root = $this->getZonePath( 'deleted' );
  41                 $dbw = $this->getMasterDB();
  42                 $status = $this->newGood();
  43                 $storageKeys = array_unique($storageKeys);
  44                 foreach ( $storageKeys as $key ) {
  45                         $hashPath = $this->getDeletedHashPath( $key );
  46                         $path = "$root/$hashPath$key";
  47                         $dbw->begin();
  48                         $inuse = $dbw->selectField( 'filearchive', '1',
  49                                 array( 'fa_storage_group' => 'deleted', 'fa_storage_key' => $key ),
  50                                 __METHOD__, array( 'FOR UPDATE' ) );
  51                         if( !$inuse ) {
  52                                 $sha1 = substr( $key, 0, strcspn( $key, '.' ) );
  53                                 $ext = substr( $key, strcspn($key,'.') + 1 );
  54                                 $ext = File::normalizeExtension($ext);
  55                                 $inuse = $dbw->selectField( 'oldimage', '1',
  56                                         array( 'oi_sha1' => $sha1,
  57                                                 "oi_archive_name LIKE '%.{$ext}'",
  58                                                 'oi_deleted & '.File::DELETED_FILE => File::DELETED_FILE ),
  59                                         __METHOD__, array( 'FOR UPDATE' ) );
  60                         }
  61                         if ( !$inuse ) {
  62                                 wfDebug( __METHOD__ . ": deleting $key\n" );
  63                                 if ( !@unlink( $path ) ) {
  64                                         $status->error( 'undelete-cleanup-error', $path );
  65                                         $status->failCount++;
  66                                 }
  67                         } else {
  68                                 wfDebug( __METHOD__ . ": $key still in use\n" );
  69                                 $status->successCount++;
  70                         }
  71                         $dbw->commit();
  72                 }
  73                 return $status;
  74         }
  75
  76         /**
  77          * Function link Title::getArticleID().
  78          * We can't say Title object, what database it should use, so we duplicate that function here.
  79          */
  80         protected function getArticleID( $title ) {
  81                 if( !$title instanceof Title ) {
  82                         return 0;
  83                 }
  84                 $dbr = $this->getSlaveDB();
  85                 $id = $dbr->selectField(
  86                         'page', // Table
  87                         'page_id',      //Field
  88                         array(  //Conditions
  89                                 'page_namespace' => $title->getNamespace(),
  90                                 'page_title' => $title->getDbKey(),
  91                         ),
  92                         __METHOD__      //Function name
  93                 );
  94                 return $id;
  95         }
  96
  97         function checkRedirect( $title ) {
  98                 global $wgMemc;
  99
 100                 if( is_string( $title ) ) {
 101                         $title = Title::newFromTitle( $title );
 102                 }
 103                 if( $title instanceof Title && $title->getNamespace() == NS_MEDIA ) {
 104                         $title = Title::makeTitle( NS_IMAGE, $title->getText() );
 105                 }
 106
 107                 $memcKey = wfMemcKey( "image_redirect:" . md5( $title->getPrefixedDBkey() ) );
 108                 $cachedValue = $wgMemc->get( $memcKey );
 109                 if( $cachedValue ) {
 110                         return Title::newFromDbKey( $cachedValue );
 111                 } elseif( $cachedValue == ' ' ) { # FIXME: ugly hack, but BagOStuff caching seems to be weird and return false if !cachedValue, not only if it doesn't exist
 112                         return false;
 113                 }
 114
 115                 $id = $this->getArticleID( $title );
 116                 if( !$id ) {
 117                         $wgMemc->set( $memcKey, " ", 9000 );
 118                         return false;
 119                 }
 120                 $dbr = $this->getSlaveDB();
 121                 $row = $dbr->selectRow(
 122                         'redirect',
 123                         array( 'rd_title', 'rd_namespace' ),
 124                         array( 'rd_from' => $id ),
 125                         __METHOD__
 126                 );
 127
 128                 if( $row ) $targetTitle = Title::makeTitle( $row->rd_namespace, $row->rd_title );
 129                 $wgMemc->set( $memcKey, ($row ? $targetTitle->getPrefixedDBkey() : " "), 9000 );
 130                 if( !$row ) {
 131                         return false;
 132                 }
 133                 return $targetTitle;
 134         }
 135
 136         function invalidateImageRedirect( $title ) {
 137                 global $wgMemc;
 138                 $memcKey = wfMemcKey( "image_redirect:" . md5( $title->getPrefixedDBkey() ) );
 139                 $wgMemc->delete( $memcKey );
 140         }
 141 }