maintenance/storage/dumpRev.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @ingroup Maintenance ExternalStorage
  19  */
  20
  21 require_once( __DIR__ . '/../Maintenance.php' );
  22
  23 class DumpRev extends Maintenance {
  24         public function __construct() {
  25                 parent::__construct();
  26                 $this->addArg( 'rev-id', 'Revision ID', true );
  27         }
  28
  29         public function execute() {
  30                 $dbr = wfGetDB( DB_SLAVE );
  31                 $row = $dbr->selectRow(
  32                         array( 'text', 'revision' ),
  33                         array( 'old_flags', 'old_text' ),
  34                         array( 'old_id=rev_text_id', 'rev_id' => $this->getArg() )
  35                 );
  36                 if ( !$row ) {
  37                         $this->error( "Row not found", true );
  38                 }
  39
  40                 $flags = explode( ',',  $row->old_flags );
  41                 $text = $row->old_text;
  42                 if ( in_array( 'external', $flags ) ) {
  43                         $this->output( "External $text\n" );
  44                         if ( preg_match( '!^DB://(\w+)/(\w+)/(\w+)$!', $text, $m ) ) {
  45                                 $es = ExternalStore::getStoreObject( 'DB' );
  46                                 $blob = $es->fetchBlob( $m[1], $m[2], $m[3] );
  47                                 if ( strtolower( get_class( $blob ) ) == 'concatenatedgziphistoryblob' ) {
  48                                         $this->output( "Found external CGZ\n" );
  49                                         $blob->uncompress();
  50                                         $this->output( "Items: (" . implode( ', ', array_keys( $blob->mItems ) ) . ")\n" );
  51                                         $text = $blob->getItem( $m[3] );
  52                                 } else {
  53                                         $this->output( "CGZ expected at $text, got " . gettype( $blob ) . "\n" );
  54                                         $text = $blob;
  55                                 }
  56                         } else {
  57                                 $this->output( "External plain $text\n" );
  58                                 $text = ExternalStore::fetchFromURL( $text );
  59                         }
  60                 }
  61                 if ( in_array( 'gzip', $flags ) ) {
  62                         $text = gzinflate( $text );
  63                 }
  64                 if ( in_array( 'object', $flags ) ) {
  65                         $obj = unserialize( $text );
  66                         $text = $obj->getText();
  67                 }
  68
  69                 if ( is_object( $text ) ) {
  70                         $this->error( "Unexpectedly got object of type: " . get_class( $text ) );
  71                 } else {
  72                         $this->output( "Text length: " . strlen( $text ) . "\n" );
  73                         $this->output( substr( $text, 0, 100 ) . "\n" );
  74                 }
  75         }
  76 }
  77
  78 $maintClass = "DumpRev";
  79 require_once( RUN_MAINTENANCE_IF_MAIN );