rebuildFileCache.php

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<?php
require_once( __DIR__ . '/Maintenance.php' );

class RebuildFileCache extends Maintenance {
        public function __construct() {
                parent::__construct();
                $this->mDescription = "Build file cache for content pages";
                $this->addOption( 'start', 'Page_id to start from', false, true );
                $this->addOption( 'end', 'Page_id to end on', false, true );
                $this->addOption( 'overwrite', 'Refresh page cache' );
                $this->setBatchSize( 100 );
        }

        public function finalSetup() {
                global $wgDebugToolbar;

                // Debug toolbar makes content uncacheable so we disable it.
                // Has to be done before Setup.php initialize MWDebug
                $wgDebugToolbar = false;
                parent::finalSetup();
        }

        public function execute() {
                global $wgUseFileCache, $wgReadOnly, $wgContentNamespaces, $wgRequestTime;
                global $wgTitle, $wgOut;
                if ( !$wgUseFileCache ) {
                        $this->error( "Nothing to do -- \$wgUseFileCache is disabled.", true );
                }

                $wgReadOnly = 'Building cache'; // avoid DB writes (like enotif/counters)

                $start = $this->getOption( 'start', "0" );
                if ( !ctype_digit( $start ) ) {
                        $this->error( "Invalid value for start parameter.", true );
                }
                $start = intval( $start );

                $end = $this->getOption( 'end', "0" );
                if ( !ctype_digit( $end ) ) {
                        $this->error( "Invalid value for end parameter.", true );
                }
                $end = intval( $end );

                $this->output( "Building content page file cache from page {$start}!\n" );

                $dbr = wfGetDB( DB_SLAVE );
                $overwrite = $this->getOption( 'overwrite', false );
                $start = ( $start > 0 )
                        ? $start
                        : $dbr->selectField( 'page', 'MIN(page_id)', false, __FUNCTION__ );
                $end = ( $end > 0 )
                        ? $end
                        : $dbr->selectField( 'page', 'MAX(page_id)', false, __FUNCTION__ );
                if ( !$start ) {
                        $this->error( "Nothing to do.", true );
                }

                $_SERVER['HTTP_ACCEPT_ENCODING'] = 'bgzip'; // hack, no real client

                # Do remaining chunk
                $end += $this->mBatchSize - 1;
                $blockStart = $start;
                $blockEnd = $start + $this->mBatchSize - 1;

                $dbw = wfGetDB( DB_MASTER );
                // Go through each page and save the output
                while ( $blockEnd <= $end ) {
                        // Get the pages
                        $res = $dbr->select( 'page', array( 'page_namespace', 'page_title', 'page_id' ),
                                array( 'page_namespace' => $wgContentNamespaces,
                                        "page_id BETWEEN $blockStart AND $blockEnd" ),
                                array( 'ORDER BY' => 'page_id ASC', 'USE INDEX' => 'PRIMARY' )
                        );

                        $dbw->begin( __METHOD__ ); // for any changes
                        foreach ( $res as $row ) {
                                $rebuilt = false;
                                $wgRequestTime = microtime( true ); # bug 22852

                                $wgTitle = Title::makeTitleSafe( $row->page_namespace, $row->page_title );
                                if ( null == $wgTitle ) {
                                        $this->output( "Page {$row->page_id} has bad title\n" );
                                        continue; // broken title?
                                }

                                $context = new RequestContext;
                                $context->setTitle( $wgTitle );
                                $article = Article::newFromTitle( $wgTitle, $context );
                                $context->setWikiPage( $article->getPage() );

                                $wgOut = $context->getOutput(); // set display title

                                // If the article is cacheable, then load it
                                if ( $article->isFileCacheable() ) {
                                        $cache = HTMLFileCache::newFromTitle( $wgTitle, 'view' );
                                        if ( $cache->isCacheGood() ) {
                                                if ( $overwrite ) {
                                                        $rebuilt = true;
                                                } else {
                                                        $this->output( "Page {$row->page_id} already cached\n" );
                                                        continue; // done already!
                                                }
                                        }
                                        ob_start( array( &$cache, 'saveToFileCache' ) ); // save on ob_end_clean()
                                        $wgUseFileCache = false; // hack, we don't want $article fiddling with filecache
                                        $article->view();
                                        wfSuppressWarnings(); // header notices
                                        $wgOut->output();
                                        wfRestoreWarnings();
                                        $wgUseFileCache = true;
                                        ob_end_clean(); // clear buffer
                                        if ( $rebuilt ) {
                                                $this->output( "Re-cached page {$row->page_id}\n" );
                                        } else {
                                                $this->output( "Cached page {$row->page_id}\n" );
                                        }
                                } else {
                                        $this->output( "Page {$row->page_id} not cacheable\n" );
                                }
                        }
                        $dbw->commit( __METHOD__ ); // commit any changes (just for sanity)

                        $blockStart += $this->mBatchSize;
                        $blockEnd += $this->mBatchSize;
                }
                $this->output( "Done!\n" );

                // Remove these to be safe
                if ( isset( $wgTitle ) )
                        unset( $wgTitle );
        }
}

$maintClass = "RebuildFileCache";
require_once( RUN_MAINTENANCE_IF_MAIN );