cleanupUploadStash.php

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<?php
require_once( dirname( __FILE__ ) . '/Maintenance.php' );

class UploadStashCleanup extends Maintenance {

        public function __construct() {
                parent::__construct();
                $this->mDescription = "Clean up abandoned files in temporary uploaded file stash";
        }

        public function execute() {
                $repo = RepoGroup::singleton()->getLocalRepo();

                $dbr = $repo->getSlaveDb();

                // how far back should this look for files to delete?
                global $wgUploadStashMaxAge;

                $this->output( "Getting list of files to clean up...\n" );
                $res = $dbr->select(
                        'uploadstash',
                        'us_key',
                        'us_timestamp < ' . $dbr->addQuotes( $dbr->timestamp( time() - $wgUploadStashMaxAge ) ),
                        __METHOD__
                );

                if( !is_object( $res ) || $res->numRows() == 0 ) {
                        $this->output( "No files to cleanup!\n" );
                        // nothing to do.
                        return;
                }

                // finish the read before starting writes.
                $keys = array();
                foreach( $res as $row ) {
                        array_push( $keys, $row->us_key );
                }

                $this->output( 'Removing ' . count($keys) . " file(s)...\n" );
                // this could be done some other, more direct/efficient way, but using
                // UploadStash's own methods means it's less likely to fall accidentally
                // out-of-date someday
                $stash = new UploadStash( $repo );

                foreach( $keys as $key ) {
                        try {
                                $stash->getFile( $key, true );
                                $stash->removeFileNoAuth( $key );
                        } catch ( UploadStashBadPathException $ex ) {
                                $this->output( "Failed removing stashed upload with key: $key\n"  );
                        }
                }
        }
}

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