refreshFileHeaders.php

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

class RefreshFileHeaders extends Maintenance {
    function __construct() {
        parent::__construct();
        $this->mDescription = 'Script to update file HTTP headers';
        $this->addOption( 'verbose', 'Output information about each file.', false, false, 'v' );
        $this->addOption( 'start', 'Name of file to start with', false, true );
        $this->addOption( 'end', 'Name of file to end with', false, true );
        $this->setBatchSize( 200 );
    }

    public function execute() {
        $repo = RepoGroup::singleton()->getLocalRepo();
        $start = str_replace( ' ', '_', $this->getOption( 'start', '' ) ); // page on img_name
        $end = str_replace( ' ', '_', $this->getOption( 'end', '' ) ); // page on img_name

        $count = 0;
        $dbr = wfGetDB( DB_SLAVE );
        do {
            $conds = array( "img_name > {$dbr->addQuotes( $start )}" );
            if ( strlen( $end ) ) {
                $conds[] = "img_name <= {$dbr->addQuotes( $end )}";
            }
            $res = $dbr->select( 'image', '*', $conds,
                __METHOD__, array( 'LIMIT' => $this->mBatchSize, 'ORDER BY' => 'img_name ASC' ) );
            foreach ( $res as $row ) {
                $file = $repo->newFileFromRow( $row );
                $headers = $file->getStreamHeaders();
                if ( count( $headers ) ) {
                    $this->updateFileHeaders( $file, $headers );
                }
                // Do all of the older file versions...
                foreach ( $file->getHistory() as $oldFile ) {
                    $headers = $oldFile->getStreamHeaders();
                    if ( count( $headers ) ) {
                        $this->updateFileHeaders( $oldFile, $headers );
                    }
                }
                if ( $this->hasOption( 'verbose' ) ) {
                    $this->output( "Updated headers for file '{$row->img_name}'.\n" );
                }
                ++$count;
                $start = $row->img_name; // advance
            }
        } while ( $res->numRows() > 0 );

        $this->output( "Done. Updated headers for $count file(s).\n" );
    }

    protected function updateFileHeaders( File $file, array $headers ) {
        $status = $file->getRepo()->getBackend()->describe( array(
            'src' => $file->getPath(), 'headers' => $headers
        ) );
        if ( !$status->isGood() ) {
            $this->error( "Encountered error: " . print_r( $status, true ) );
        }
    }
}

$maintClass = 'RefreshFileHeaders';
require_once RUN_MAINTENANCE_IF_MAIN;