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   1  <?php
   2  /**
   3   * Get the text of a revision, resolving external storage if needed.
   4   *
   5   * This program is free software; you can redistribute it and/or modify
   6   * it under the terms of the GNU General Public License as published by
   7   * the Free Software Foundation; either version 2 of the License, or
   8   * (at your option) any later version.
   9   *
  10   * This program is distributed in the hope that it will be useful,
  11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13   * GNU General Public License for more details.
  14   *
  15   * You should have received a copy of the GNU General Public License along
  16   * with this program; if not, write to the Free Software Foundation, Inc.,
  17   * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18   * http://www.gnu.org/copyleft/gpl.html
  19   *
  20   * @file
  21   * @ingroup Maintenance ExternalStorage
  22   */
  23  
  24  require_once  __DIR__ . '/../Maintenance.php';
  25  
  26  /**
  27   * Maintenance script that gets the text of a revision,
  28   * resolving external storage if needed.
  29   *
  30   * @ingroup Maintenance ExternalStorage
  31   */
  32  class DumpRev extends Maintenance {
  33  	public function __construct() {
  34          parent::__construct();
  35          $this->addArg( 'rev-id', 'Revision ID', true );
  36      }
  37  
  38  	public function execute() {
  39          $dbr = wfGetDB( DB_SLAVE );
  40          $row = $dbr->selectRow(
  41              array( 'text', 'revision' ),
  42              array( 'old_flags', 'old_text' ),
  43              array( 'old_id=rev_text_id', 'rev_id' => $this->getArg() )
  44          );
  45          if ( !$row ) {
  46              $this->error( "Row not found", true );
  47          }
  48  
  49          $flags = explode( ',', $row->old_flags );
  50          $text = $row->old_text;
  51          if ( in_array( 'external', $flags ) ) {
  52              $this->output( "External $text\n" );
  53              if ( preg_match( '!^DB://(\w+)/(\w+)/(\w+)$!', $text, $m ) ) {
  54                  $es = ExternalStore::getStoreObject( 'DB' );
  55                  $blob = $es->fetchBlob( $m[1], $m[2], $m[3] );
  56                  if ( strtolower( get_class( $blob ) ) == 'concatenatedgziphistoryblob' ) {
  57                      $this->output( "Found external CGZ\n" );
  58                      $blob->uncompress();
  59                      $this->output( "Items: (" . implode( ', ', array_keys( $blob->mItems ) ) . ")\n" );
  60                      $text = $blob->getItem( $m[3] );
  61                  } else {
  62                      $this->output( "CGZ expected at $text, got " . gettype( $blob ) . "\n" );
  63                      $text = $blob;
  64                  }
  65              } else {
  66                  $this->output( "External plain $text\n" );
  67                  $text = ExternalStore::fetchFromURL( $text );
  68              }
  69          }
  70          if ( in_array( 'gzip', $flags ) ) {
  71              $text = gzinflate( $text );
  72          }
  73          if ( in_array( 'object', $flags ) ) {
  74              $obj = unserialize( $text );
  75              $text = $obj->getText();
  76          }
  77  
  78          if ( is_object( $text ) ) {
  79              $this->error( "Unexpectedly got object of type: " . get_class( $text ) );
  80          } else {
  81              $this->output( "Text length: " . strlen( $text ) . "\n" );
  82              $this->output( substr( $text, 0, 100 ) . "\n" );
  83          }
  84      }
  85  }
  86  
  87  $maintClass = "DumpRev";
  88  require_once RUN_MAINTENANCE_IF_MAIN;