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->addArg( 'start', 'Page_id to start from', true );
  30                 $this->addArg( 'overwrite', 'Refresh page cache', false );
  31                 $this->setBatchSize( 100 );
  32         }
  33
  34         public function execute() {
  35                 global $wgUseFileCache, $wgDisableCounters, $wgContentNamespaces;
  36                 global $wgTitle, $wgArticle, $wgOut, $wgUser;
  37                 if( !$wgUseFileCache ) {
  38                         $this->error( "Nothing to do -- \$wgUseFileCache is disabled.", true );
  39                 }
  40                 $wgDisableCounters = false;
  41                 $start = $this->getArg( 0, "0" );
  42                 if( !ctype_digit($start) ) {
  43                         $this->error( "Invalid value for start parameter.", true );
  44                 }
  45                 $start = intval($start);
  46                 $overwrite = $this->hasArg(1) && $this->getArg(1) === 'overwrite';
  47                 $this->output( "Building content page file cache from page {$start}!\n" );
  48
  49                 $dbr = wfGetDB( DB_SLAVE );
  50                 $start = $start > 0 ? $start : $dbr->selectField( 'page', 'MIN(page_id)', false, __FUNCTION__ );
  51                 $end = $dbr->selectField( 'page', 'MAX(page_id)', false, __FUNCTION__ );
  52                 if( !$start ) {
  53                         $this->error( "Nothing to do.", true );
  54                 }
  55
  56                 $_SERVER['HTTP_ACCEPT_ENCODING'] = 'bgzip'; // hack, no real client
  57                 OutputPage::setEncodings(); # Not really used yet
  58
  59                 # Do remaining chunk
  60                 $end += $this->mBatchSize - 1;
  61                 $blockStart = $start;
  62                 $blockEnd = $start + $this->mBatchSize - 1;
  63
  64                 $dbw = wfGetDB( DB_MASTER );
  65                 // Go through each page and save the output
  66                 while( $blockEnd <= $end ) {
  67                         // Get the pages
  68                         $res = $dbr->select( 'page', array('page_namespace','page_title','page_id'),
  69                                 array('page_namespace' => $wgContentNamespaces,
  70                                         "page_id BETWEEN $blockStart AND $blockEnd" ),
  71                                 array('ORDER BY' => 'page_id ASC','USE INDEX' => 'PRIMARY')
  72                         );
  73                         foreach( $res as $row ) {
  74                                 $rebuilt = false;
  75                                 $wgTitle = Title::makeTitleSafe( $row->page_namespace, $row->page_title );
  76                                 if( null == $wgTitle ) {
  77                                         $this->output( "Page {$row->page_id} has bad title\n" );
  78                                         continue; // broken title?
  79                                 }
  80                                 $wgOut->setTitle( $wgTitle ); // set display title
  81                                 $wgUser->getSkin( $wgTitle ); // set skin title
  82                                 $wgArticle = new Article( $wgTitle );
  83                                 // If the article is cacheable, then load it
  84                                 if( $wgArticle->isFileCacheable() ) {
  85                                         $cache = new HTMLFileCache( $wgTitle );
  86                                         if( $cache->isFileCacheGood() ) {
  87                                                 if( $overwrite ) {
  88                                                         $rebuilt = true;
  89                                                 } else {
  90                                                         $this->output( "Page {$row->page_id} already cached\n" );
  91                                                         continue; // done already!
  92                                                 }
  93                                         }
  94                                         ob_start( array(&$cache, 'saveToFileCache' ) ); // save on ob_end_clean()
  95                                         $wgUseFileCache = false; // hack, we don't want $wgArticle fiddling with filecache
  96                                         $wgArticle->view();
  97                                         @$wgOut->output(); // header notices
  98                                         $wgUseFileCache = true;
  99                                         ob_end_clean(); // clear buffer
 100                                         $wgOut = new OutputPage(); // empty out any output page garbage
 101                                         if( $rebuilt )
 102                                                 $this->output( "Re-cached page {$row->page_id}\n" );
 103                                         else
 104                                                 $this->output( "Cached page {$row->page_id}\n" );
 105                                 } else {
 106                                         $this->output( "Page {$row->page_id} not cacheable\n" );
 107                                 }
 108                                 $dbw->commit(); // commit any changes
 109                         }
 110                         $blockStart += $this->mBatchSize;
 111                         $blockEnd += $this->mBatchSize;
 112                         wfWaitForSlaves( 5 );
 113                 }
 114                 $this->output( "Done!\n" );
 115
 116                 // Remove these to be safe
 117                 if( isset($wgTitle) )
 118                         unset($wgTitle);
 119                 if( isset($wgArticle) )
 120                         unset($wgArticle);
 121         }
 122 }
 123
 124 $maintClass = "RebuildFileCache";
 125 require_once( DO_MAINTENANCE );