maintenance/fetchText.php

   1 <?php
   2 /**
   3  * Communications protocol...
   4  * This is used by dumpTextPass.php when the --spawn option is present.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @ingroup Maintenance
  22  */
  23
  24 require_once( dirname( __FILE__ ) . '/Maintenance.php' );
  25
  26 class FetchText extends Maintenance {
  27         public function __construct() {
  28                 parent::__construct();
  29                 $this->mDescription = "Fetch the revision text from an old_id";
  30         }
  31
  32         /**
  33          * returns a string containing the following in order:
  34          *       textid
  35          *       \n
  36          *       length of text (-1 on error = failure to retrieve/unserialize/gunzip/etc)
  37          *       \n
  38          *       text  (may be empty)
  39          *
  40          * note that that the text string itself is *not* followed by newline
  41          */
  42          public function execute() {
  43                 $db = wfGetDB( DB_SLAVE );
  44                 $stdin = $this->getStdin();
  45                 while ( !feof( $stdin ) ) {
  46                         $line = fgets( $stdin );
  47                         if ( $line === false ) {
  48                                 // We appear to have lost contact...
  49                                 break;
  50                         }
  51                         $textId = intval( $line );
  52                         $text = $this->doGetText( $db, $textId );
  53                         if ($text === false) {
  54                                 # actual error, not zero-length text
  55                                 $textLen = "-1";
  56                         }
  57                         else {
  58                                 $textLen = strlen($text);
  59                         }
  60                         $this->output( $textId . "\n" . $textLen . "\n" . $text );
  61                 }
  62         }
  63
  64         /**
  65          * May throw a database error if, say, the server dies during query.
  66          * @param $db DatabaseBase object
  67          * @param $id int The old_id
  68          * @return String
  69          */
  70         private function doGetText( $db, $id ) {
  71                 $id = intval( $id );
  72                 $row = $db->selectRow( 'text',
  73                         array( 'old_text', 'old_flags' ),
  74                         array( 'old_id' => $id ),
  75                         __METHOD__ );
  76                 $text = Revision::getRevisionText( $row );
  77                 if ( $text === false ) {
  78                         return false;
  79                 }
  80                 return $text;
  81         }
  82 }
  83
  84 $maintClass = "FetchText";
  85 require_once( RUN_MAINTENANCE_IF_MAIN );