backup.inc

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<?php
class DumpDBZip2Output extends DumpPipeOutput {
        function __construct( $file ) {
                parent::__construct( "dbzip2", $file );
        }
}

class BackupDumper {
        var $reportingInterval = 100;
        var $reporting = true;
        var $pageCount = 0;
        var $revCount  = 0;
        var $server    = null; // use default
        var $pages     = null; // all pages
        var $skipHeader = false; // don't output <mediawiki> and <siteinfo>
        var $skipFooter = false; // don't output </mediawiki>
        var $startId    = 0;
        var $endId      = 0;
        var $revStartId = 0;
        var $revEndId   = 0;
        var $sink       = null; // Output filters
        var $stubText   = false; // include rev_text_id instead of text; for 2-pass dump
        var $dumpUploads = false;
        var $dumpUploadFileContents = false;
        var $lastTime = 0;
        var $pageCountLast = 0;
        var $revCountLast = 0;
        var $ID = 0;

        var $outputTypes = array(), $filterTypes = array();

        protected $forcedDb = null;

        protected $lb;

        function __construct( $args ) {
                $this->stderr = fopen( "php://stderr", "wt" );

                // Built-in output and filter plugins
                $this->registerOutput( 'file', 'DumpFileOutput' );
                $this->registerOutput( 'gzip', 'DumpGZipOutput' );
                $this->registerOutput( 'bzip2', 'DumpBZip2Output' );
                $this->registerOutput( 'dbzip2', 'DumpDBZip2Output' );
                $this->registerOutput( '7zip', 'Dump7ZipOutput' );

                $this->registerFilter( 'latest', 'DumpLatestFilter' );
                $this->registerFilter( 'notalk', 'DumpNotalkFilter' );
                $this->registerFilter( 'namespace', 'DumpNamespaceFilter' );

                $this->sink = $this->processArgs( $args );
        }

        function registerOutput( $name, $class ) {
                $this->outputTypes[$name] = $class;
        }

        function registerFilter( $name, $class ) {
                $this->filterTypes[$name] = $class;
        }

        function loadPlugin( $class, $file ) {
                if ( $file != '' ) {
                        require_once( $file );
                }
                $register = array( $class, 'register' );
                call_user_func_array( $register, array( &$this ) );
        }

        function processArgs( $args ) {
                $sink = null;
                $sinks = array();
                foreach ( $args as $arg ) {
                        $matches = array();
                        if ( preg_match( '/^--(.+?)(?:=(.+?)(?::(.+?))?)?$/', $arg, $matches ) ) {
                                @list( /* $full */ , $opt, $val, $param ) = $matches;
                                switch( $opt ) {
                                case "plugin":
                                        $this->loadPlugin( $val, $param );
                                        break;
                                case "output":
                                        if ( !is_null( $sink ) ) {
                                                $sinks[] = $sink;
                                        }
                                        if ( !isset( $this->outputTypes[$val] ) ) {
                                                $this->fatalError( "Unrecognized output sink type '$val'" );
                                        }
                                        $type = $this->outputTypes[$val];
                                        $sink = new $type( $param );
                                        break;
                                case "filter":
                                        if ( is_null( $sink ) ) {
                                                $sink = new DumpOutput();
                                        }
                                        if ( !isset( $this->filterTypes[$val] ) ) {
                                                $this->fatalError( "Unrecognized filter type '$val'" );
                                        }
                                        $type = $this->filterTypes[$val];
                                        $filter = new $type( $sink, $param );

                                        // references are lame in php...
                                        unset( $sink );
                                        $sink = $filter;

                                        break;
                                case "report":
                                        $this->reportingInterval = intval( $val );
                                        break;
                                case "server":
                                        $this->server = $val;
                                        break;
                                case "force-normal":
                                        if ( !function_exists( 'utf8_normalize' ) ) {
                                                wfDl( "php_utfnormal.so" );
                                                if ( !function_exists( 'utf8_normalize' ) ) {
                                                        $this->fatalError( "Failed to load UTF-8 normalization extension. " .
                                                                "Install or remove --force-normal parameter to use slower code." );
                                                }
                                        }
                                        break;
                                default:
                                        $this->processOption( $opt, $val, $param );
                                }
                        }
                }

                if ( is_null( $sink ) ) {
                        $sink = new DumpOutput();
                }
                $sinks[] = $sink;

                if ( count( $sinks ) > 1 ) {
                        return new DumpMultiWriter( $sinks );
                } else {
                        return $sink;
                }
        }

        function processOption( $opt, $val, $param ) {
                // extension point for subclasses to add options
        }

        function dump( $history, $text = WikiExporter::TEXT ) {
                # Notice messages will foul up your XML output even if they're
                # relatively harmless.
                if ( ini_get( 'display_errors' ) )
                        ini_set( 'display_errors', 'stderr' );

                $this->initProgress( $history );

                $db = $this->backupDb();
                $exporter = new WikiExporter( $db, $history, WikiExporter::STREAM, $text );
                $exporter->dumpUploads = $this->dumpUploads;
                $exporter->dumpUploadFileContents = $this->dumpUploadFileContents;

                $wrapper = new ExportProgressFilter( $this->sink, $this );
                $exporter->setOutputSink( $wrapper );

                if ( !$this->skipHeader )
                        $exporter->openStream();
                # Log item dumps: all or by range
                if ( $history & WikiExporter::LOGS ) {
                        if ( $this->startId || $this->endId ) {
                                $exporter->logsByRange( $this->startId, $this->endId );
                        } else {
                                $exporter->allLogs();
                        }
                # Page dumps: all or by page ID range
                } else if ( is_null( $this->pages ) ) {
                        if ( $this->startId || $this->endId ) {
                                $exporter->pagesByRange( $this->startId, $this->endId );
                        } elseif ( $this->revStartId || $this->revEndId ) {
                                $exporter->revsByRange( $this->revStartId, $this->revEndId );
                        } else {
                                $exporter->allPages();
                        }
                # Dump of specific pages
                } else {
                        $exporter->pagesByName( $this->pages );
                }

                if ( !$this->skipFooter )
                        $exporter->closeStream();

                $this->report( true );
        }

        function initProgress( $history = WikiExporter::FULL ) {
                $table = ( $history == WikiExporter::CURRENT ) ? 'page' : 'revision';
                $field = ( $history == WikiExporter::CURRENT ) ? 'page_id' : 'rev_id';

                $dbr = $this->forcedDb;
                if ( $this->forcedDb === null ) {
                        $dbr = wfGetDB( DB_SLAVE );
                }
                $this->maxCount = $dbr->selectField( $table, "MAX($field)", '', __METHOD__ );
                $this->startTime = microtime( true );
                $this->lastTime = $this->startTime;
                $this->ID = getmypid();
        }

        function backupDb() {
                if ( $this->forcedDb !== null ) {
                        return $this->forcedDb;
                }

                $this->lb = wfGetLBFactory()->newMainLB();
                $db = $this->lb->getConnection( DB_SLAVE, 'backup' );

                // Discourage the server from disconnecting us if it takes a long time
                // to read out the big ol' batch query.
                $db->setSessionOptions( array( 'connTimeout' => 3600 * 24 ) );

                return $db;
        }

        function setDb( DatabaseBase $db = null ) {
                $this->forcedDb = $db;
        }

        function __destruct() {
                if ( isset( $this->lb ) ) {
                        $this->lb->closeAll();
                }
        }

        function backupServer() {
                global $wgDBserver;
                return $this->server
                        ? $this->server
                        : $wgDBserver;
        }

        function reportPage() {
                $this->pageCount++;
        }

        function revCount() {
                $this->revCount++;
                $this->report();
        }

        function report( $final = false ) {
                if ( $final xor ( $this->revCount % $this->reportingInterval == 0 ) ) {
                        $this->showReport();
                }
        }

        function showReport() {
                if ( $this->reporting ) {
                        $now = wfTimestamp( TS_DB );
                        $nowts = microtime( true );
                        $deltaAll = $nowts - $this->startTime;
                        $deltaPart = $nowts - $this->lastTime;
                        $this->pageCountPart = $this->pageCount - $this->pageCountLast;
                        $this->revCountPart = $this->revCount - $this->revCountLast;

                        if ( $deltaAll ) {
                                $portion = $this->revCount / $this->maxCount;
                                $eta = $this->startTime + $deltaAll / $portion;
                                $etats = wfTimestamp( TS_DB, intval( $eta ) );
                                $pageRate = $this->pageCount / $deltaAll;
                                $revRate = $this->revCount / $deltaAll;
                        } else {
                                $pageRate = '-';
                                $revRate = '-';
                                $etats = '-';
                        }
                        if ( $deltaPart ) {
                                $pageRatePart = $this->pageCountPart / $deltaPart;
                                $revRatePart = $this->revCountPart / $deltaPart;
                        } else {
                                $pageRatePart = '-';
                                $revRatePart = '-';
                        }
                        $this->progress( sprintf( "%s: %s (ID %d) %d pages (%0.1f|%0.1f/sec all|curr), %d revs (%0.1f|%0.1f/sec all|curr), ETA %s [max %d]",
                                        $now, wfWikiID(), $this->ID, $this->pageCount, $pageRate, $pageRatePart, $this->revCount, $revRate, $revRatePart, $etats, $this->maxCount ) );
                        $this->lastTime = $nowts;
                        $this->revCountLast = $this->revCount;
                }
        }

        function progress( $string ) {
                fwrite( $this->stderr, $string . "\n" );
        }

        function fatalError( $msg ) {
                $this->progress( "$msg\n" );
                die(1);
        }
}

class ExportProgressFilter extends DumpFilter {
        function __construct( &$sink, &$progress ) {
                parent::__construct( $sink );
                $this->progress = $progress;
        }

        function writeClosePage( $string ) {
                parent::writeClosePage( $string );
                $this->progress->reportPage();
        }

        function writeRevision( $rev, $string ) {
                parent::writeRevision( $rev, $string );
                $this->progress->revCount();
        }
}