maintenance/rebuildFileCache.php

   1 <?php
   2 /**
   3  * Build file cache for content pages
   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  * @ingroup Maintenance
  21  */
  22
  23 require_once( dirname(__FILE__) . '/Maintenance.php' );
  24
  25 class RebuildFileCache extends Maintenance {
  26         public function __construct() {
  27                 parent::__construct();
  28                 $this->mDescription = "Build file cache for content pages";
  29                 $this->addArgs( array( 'start', 'overwrite' ) );
  30                 $this->setBatchSize( 100 );
  31         }
  32
  33         public function execute() {
  34                 global $wgUseFileCache, $wgContentNamespaces, $wgDisableCounters, $wgTitle, $wgArticle, $wgOut;
  35                 if( !$wgUseFileCache ) {
  36                         $this->error( "Nothing to do -- \$wgUseFileCache is disabled.", true );
  37                 }
  38                 $wgDisableCounters = false;
  39                 $start = intval( $this->getArg( 0, 0 ) );
  40                 $overwrite = $this->hasArg(1) && $this->getArg(1) === 'overwrite';
  41                 $this->output( "Building content page file cache from page {$start}!\n" );
  42
  43                 $dbr = wfGetDB( DB_SLAVE );
  44                 $start = $start > 0 ? $start : $dbr->selectField( 'page', 'MIN(page_id)', false, __FUNCTION__ );
  45                 $end = $dbr->selectField( 'page', 'MAX(page_id)', false, __FUNCTION__ );
  46                 if( !$start ) {
  47                         $this->error( "Nothing to do.", true );
  48                 }
  49
  50                 $_SERVER['HTTP_ACCEPT_ENCODING'] = 'bgzip'; // hack, no real client
  51                 OutputPage::setEncodings(); # Not really used yet
  52
  53                 # Do remaining chunk
  54                 $end += $this->mBatchSize - 1;
  55                 $blockStart = $start;
  56                 $blockEnd = $start + $this->mBatchSize - 1;
  57
  58                 $dbw = wfGetDB( DB_MASTER );
  59                 // Go through each page and save the output
  60                 while( $blockEnd <= $end ) {
  61                         // Get the pages
  62                         $res = $dbr->select( 'page', array('page_namespace','page_title','page_id'),
  63                                 array('page_namespace' => $wgContentNamespaces,
  64                                         "page_id BETWEEN $blockStart AND $blockEnd" ),
  65                                 array('ORDER BY' => 'page_id ASC','USE INDEX' => 'PRIMARY')
  66                         );
  67                         while( $row = $dbr->fetchObject( $res ) ) {
  68                                 $rebuilt = false;
  69                                 $wgTitle = Title::makeTitleSafe( $row->page_namespace, $row->page_title );
  70                                 if( null == $wgTitle ) {
  71                                         $this->output( "Page {$row->page_id} bad title\n" );
  72                                         continue; // broken title?
  73                                 }
  74                                 $wgArticle = new Article( $wgTitle );
  75                                 // If the article is cacheable, then load it
  76                                 if( $wgArticle->isFileCacheable() ) {
  77                                         $cache = new HTMLFileCache( $wgTitle );
  78                                         if( $cache->isFileCacheGood() ) {
  79                                                 if( $overwrite ) {
  80                                                         $rebuilt = true;
  81                                                 } else {
  82                                                         $this->output( "Page {$row->page_id} already cached\n" );
  83                                                         continue; // done already!
  84                                                 }
  85                                         }
  86                                         ob_start( array(&$cache, 'saveToFileCache' ) ); // save on ob_end_clean()
  87                                         $wgUseFileCache = false; // hack, we don't want $wgArticle fiddling with filecache
  88                                         $wgArticle->view();
  89                                         @$wgOut->output(); // header notices
  90                                         $wgUseFileCache = true;
  91                                         ob_end_clean(); // clear buffer
  92                                         $wgOut = new OutputPage(); // empty out any output page garbage
  93                                         if( $rebuilt )
  94                                                 $this->output( "Re-cached page {$row->page_id}\n" );
  95                                         else
  96                                                 $this->output( "Cached page {$row->page_id}\n" );
  97                                 } else {
  98                                         $this->output( "Page {$row->page_id} not cacheable\n" );
  99                                 }
 100                                 $dbw->commit(); // commit any changes
 101                         }
 102                         $blockStart += $this->mBatchSize;
 103                         $blockEnd += $this->mBatchSize;
 104                         wfWaitForSlaves( 5 );
 105                 }
 106                 $this->output( "Done!\n" );
 107
 108                 // Remove these to be safe
 109                 if( isset($wgTitle) )
 110                         unset($wgTitle);
 111                 if( isset($wgArticle) )
 112                         unset($wgArticle);
 113         }
 114 }
 115
 116 $maintClass = "RebuildFileCache";
 117 require_once( DO_MAINTENANCE );