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  * @file
  21  * @ingroup Maintenance
  22  */
  23
  24 require_once __DIR__ . '/Maintenance.php';
  25
  26 /**
  27  * Maintenance script that builds file cache for content pages.
  28  *
  29  * @ingroup Maintenance
  30  */
  31 class RebuildFileCache extends Maintenance {
  32         private $enabled = true;
  33
  34         public function __construct() {
  35                 parent::__construct();
  36                 $this->addDescription( 'Build file cache for content pages' );
  37                 $this->addOption( 'start', 'Page_id to start from', false, true );
  38                 $this->addOption( 'end', 'Page_id to end on', false, true );
  39                 $this->addOption( 'overwrite', 'Refresh page cache' );
  40                 $this->setBatchSize( 100 );
  41         }
  42
  43         public function finalSetup() {
  44                 global $wgDebugToolbar, $wgUseFileCache, $wgReadOnly;
  45
  46                 $this->enabled = $wgUseFileCache;
  47                 // Script will handle capturing output and saving it itself
  48                 $wgUseFileCache = false;
  49                 // Debug toolbar makes content uncacheable so we disable it.
  50                 // Has to be done before Setup.php initialize MWDebug
  51                 $wgDebugToolbar = false;
  52                 //  Avoid DB writes (like enotif/counters)
  53                 $wgReadOnly = 'Building cache'; // avoid DB writes (like enotif/counters)
  54
  55                 parent::finalSetup();
  56         }
  57
  58         public function execute() {
  59                 global $wgRequestTime;
  60
  61                 if ( !$this->enabled ) {
  62                         $this->error( "Nothing to do -- \$wgUseFileCache is disabled.", true );
  63                 }
  64
  65                 $start = $this->getOption( 'start', "0" );
  66                 if ( !ctype_digit( $start ) ) {
  67                         $this->error( "Invalid value for start parameter.", true );
  68                 }
  69                 $start = intval( $start );
  70
  71                 $end = $this->getOption( 'end', "0" );
  72                 if ( !ctype_digit( $end ) ) {
  73                         $this->error( "Invalid value for end parameter.", true );
  74                 }
  75                 $end = intval( $end );
  76
  77                 $this->output( "Building content page file cache from page {$start}!\n" );
  78
  79                 $dbr = $this->getDB( DB_REPLICA );
  80                 $overwrite = $this->getOption( 'overwrite', false );
  81                 $start = ( $start > 0 )
  82                         ? $start
  83                         : $dbr->selectField( 'page', 'MIN(page_id)', false, __METHOD__ );
  84                 $end = ( $end > 0 )
  85                         ? $end
  86                         : $dbr->selectField( 'page', 'MAX(page_id)', false, __METHOD__ );
  87                 if ( !$start ) {
  88                         $this->error( "Nothing to do.", true );
  89                 }
  90
  91                 $_SERVER['HTTP_ACCEPT_ENCODING'] = 'bgzip'; // hack, no real client
  92
  93                 # Do remaining chunk
  94                 $end += $this->mBatchSize - 1;
  95                 $blockStart = $start;
  96                 $blockEnd = $start + $this->mBatchSize - 1;
  97
  98                 $dbw = $this->getDB( DB_MASTER );
  99                 // Go through each page and save the output
 100                 while ( $blockEnd <= $end ) {
 101                         // Get the pages
 102                         $res = $dbr->select( 'page',
 103                                 [ 'page_namespace', 'page_title', 'page_id' ],
 104                                 [ 'page_namespace' => MWNamespace::getContentNamespaces(),
 105                                         "page_id BETWEEN $blockStart AND $blockEnd" ],
 106                                 __METHOD__,
 107                                 [ 'ORDER BY' => 'page_id ASC', 'USE INDEX' => 'PRIMARY' ]
 108                         );
 109
 110                         $this->beginTransaction( $dbw, __METHOD__ ); // for any changes
 111                         foreach ( $res as $row ) {
 112                                 $rebuilt = false;
 113
 114                                 $title = Title::makeTitleSafe( $row->page_namespace, $row->page_title );
 115                                 if ( null == $title ) {
 116                                         $this->output( "Page {$row->page_id} has bad title\n" );
 117                                         continue; // broken title?
 118                                 }
 119
 120                                 $context = new RequestContext();
 121                                 $context->setTitle( $title );
 122                                 $article = Article::newFromTitle( $title, $context );
 123                                 $context->setWikiPage( $article->getPage() );
 124
 125                                 // If the article is cacheable, then load it
 126                                 if ( $article->isFileCacheable( HTMLFileCache::MODE_REBUILD ) ) {
 127                                         $viewCache = new HTMLFileCache( $title, 'view' );
 128                                         $historyCache = new HTMLFileCache( $title, 'history' );
 129                                         if ( $viewCache->isCacheGood() && $historyCache->isCacheGood() ) {
 130                                                 if ( $overwrite ) {
 131                                                         $rebuilt = true;
 132                                                 } else {
 133                                                         $this->output( "Page '$title' (id {$row->page_id}) already cached\n" );
 134                                                         continue; // done already!
 135                                                 }
 136                                         }
 137
 138                                         MediaWiki\suppressWarnings(); // header notices
 139                                         // Cache ?action=view
 140                                         $wgRequestTime = microtime( true ); # bug 22852
 141                                         ob_start();
 142                                         $article->view();
 143                                         $context->getOutput()->output();
 144                                         $context->getOutput()->clearHTML();
 145                                         $viewHtml = ob_get_clean();
 146                                         $viewCache->saveToFileCache( $viewHtml );
 147                                         // Cache ?action=history
 148                                         $wgRequestTime = microtime( true ); # bug 22852
 149                                         ob_start();
 150                                         Action::factory( 'history', $article, $context )->show();
 151                                         $context->getOutput()->output();
 152                                         $context->getOutput()->clearHTML();
 153                                         $historyHtml = ob_get_clean();
 154                                         $historyCache->saveToFileCache( $historyHtml );
 155                                         MediaWiki\restoreWarnings();
 156
 157                                         if ( $rebuilt ) {
 158                                                 $this->output( "Re-cached page '$title' (id {$row->page_id})..." );
 159                                         } else {
 160                                                 $this->output( "Cached page '$title' (id {$row->page_id})..." );
 161                                         }
 162                                         $this->output( "[view: " . strlen( $viewHtml ) . " bytes; " .
 163                                                 "history: " . strlen( $historyHtml ) . " bytes]\n" );
 164                                 } else {
 165                                         $this->output( "Page '$title' (id {$row->page_id}) not cacheable\n" );
 166                                 }
 167                         }
 168                         $this->commitTransaction( $dbw, __METHOD__ ); // commit any changes (just for sanity)
 169
 170                         $blockStart += $this->mBatchSize;
 171                         $blockEnd += $this->mBatchSize;
 172                 }
 173                 $this->output( "Done!\n" );
 174         }
 175 }
 176
 177 $maintClass = "RebuildFileCache";
 178 require_once RUN_MAINTENANCE_IF_MAIN;