Split Export.php classes into seperate files
authormhutti1 <mhutti1@gmail.com>
Mon, 28 Dec 2015 22:23:22 +0000 (23:23 +0100)
committerMhutti1 <mhutti1@gmail.com>
Mon, 28 Dec 2015 22:51:06 +0000 (22:51 +0000)
Moved classes in Export.php to seperate files in the new directory
includes/export/ and updated autoload.php to these new locations.

Bug: T122531
Change-Id: Idd3bba5a85d65c952f2ff503bea2ca76624c9b7f

15 files changed:
autoload.php
includes/Export.php [deleted file]
includes/export/Dump7ZipOutput.php [new file with mode: 0644]
includes/export/DumpBZip2Output.php [new file with mode: 0644]
includes/export/DumpFileOutput.php [new file with mode: 0644]
includes/export/DumpFilter.php [new file with mode: 0644]
includes/export/DumpGZipOutput.php [new file with mode: 0644]
includes/export/DumpLatestFilter.php [new file with mode: 0644]
includes/export/DumpMultiWriter.php [new file with mode: 0644]
includes/export/DumpNamespaceFilter.php [new file with mode: 0644]
includes/export/DumpNotalkFilter.php [new file with mode: 0644]
includes/export/DumpOutput.php [new file with mode: 0644]
includes/export/DumpPipeOutput.php [new file with mode: 0644]
includes/export/WikiExporter.php [new file with mode: 0644]
includes/export/XmlDumpWriter.php [new file with mode: 0644]

index 8c5ec81..4d7ed5b 100644 (file)
@@ -352,21 +352,21 @@ $wgAutoloadLocalClasses = array(
        'DoubleReplacer' => __DIR__ . '/includes/libs/replacers/DoubleReplacer.php',
        'DummyLinker' => __DIR__ . '/includes/Linker.php',
        'DummyTermColorer' => __DIR__ . '/maintenance/term/MWTerm.php',
-       'Dump7ZipOutput' => __DIR__ . '/includes/Export.php',
-       'DumpBZip2Output' => __DIR__ . '/includes/Export.php',
+       'Dump7ZipOutput' => __DIR__ . '/includes/export/Dump7ZipOutput.php',
+       'DumpBZip2Output' => __DIR__ . '/includes/export/DumpBZip2Output.php',
        'DumpDBZip2Output' => __DIR__ . '/maintenance/backup.inc',
-       'DumpFileOutput' => __DIR__ . '/includes/Export.php',
-       'DumpFilter' => __DIR__ . '/includes/Export.php',
-       'DumpGZipOutput' => __DIR__ . '/includes/Export.php',
+       'DumpFileOutput' => __DIR__ . '/includes/export/DumpFileOutput.php',
+       'DumpFilter' => __DIR__ . '/includes/export/DumpFilter.php',
+       'DumpGZipOutput' => __DIR__ . '/includes/export/DumpGZipOutput.php',
        'DumpIterator' => __DIR__ . '/maintenance/dumpIterator.php',
-       'DumpLatestFilter' => __DIR__ . '/includes/Export.php',
+       'DumpLatestFilter' => __DIR__ . '/includes/export/DumpLatestFilter.php',
        'DumpLinks' => __DIR__ . '/maintenance/dumpLinks.php',
        'DumpMessages' => __DIR__ . '/maintenance/language/dumpMessages.php',
-       'DumpMultiWriter' => __DIR__ . '/includes/Export.php',
-       'DumpNamespaceFilter' => __DIR__ . '/includes/Export.php',
-       'DumpNotalkFilter' => __DIR__ . '/includes/Export.php',
-       'DumpOutput' => __DIR__ . '/includes/Export.php',
-       'DumpPipeOutput' => __DIR__ . '/includes/Export.php',
+       'DumpMultiWriter' => __DIR__ . '/includes/export/DumpMultiWriter.php',
+       'DumpNamespaceFilter' => __DIR__ . '/includes/export/DumpNamespaceFilter.php',
+       'DumpNotalkFilter' => __DIR__ . '/includes/export/DumpNotalkFilter.php',
+       'DumpOutput' => __DIR__ . '/includes/export/DumpOutput.php',
+       'DumpPipeOutput' => __DIR__ . '/includes/export/DumpPipeOutput.php',
        'DumpRenderer' => __DIR__ . '/maintenance/renderDump.php',
        'DumpRev' => __DIR__ . '/maintenance/storage/dumpRev.php',
        'DuplicateJob' => __DIR__ . '/includes/jobqueue/jobs/DuplicateJob.php',
@@ -1386,7 +1386,7 @@ $wgAutoloadLocalClasses = array(
        'WebResponse' => __DIR__ . '/includes/WebResponse.php',
        'WikiCategoryPage' => __DIR__ . '/includes/page/WikiCategoryPage.php',
        'WikiDiff3' => __DIR__ . '/includes/diff/WikiDiff3.php',
-       'WikiExporter' => __DIR__ . '/includes/Export.php',
+       'WikiExporter' => __DIR__ . '/includes/export/WikiExporter.php',
        'WikiFilePage' => __DIR__ . '/includes/page/WikiFilePage.php',
        'WikiImporter' => __DIR__ . '/includes/Import.php',
        'WikiMap' => __DIR__ . '/includes/WikiMap.php',
@@ -1408,7 +1408,7 @@ $wgAutoloadLocalClasses = array(
        'XMPValidate' => __DIR__ . '/includes/media/XMPValidate.php',
        'Xhprof' => __DIR__ . '/includes/libs/Xhprof.php',
        'Xml' => __DIR__ . '/includes/Xml.php',
-       'XmlDumpWriter' => __DIR__ . '/includes/Export.php',
+       'XmlDumpWriter' => __DIR__ . '/includes/export/XmlDumpWriter.php',
        'XmlJsCode' => __DIR__ . '/includes/Xml.php',
        'XmlSelect' => __DIR__ . '/includes/XmlSelect.php',
        'XmlTypeCheck' => __DIR__ . '/includes/libs/XmlTypeCheck.php',
diff --git a/includes/Export.php b/includes/Export.php
deleted file mode 100644 (file)
index b4d7737..0000000
+++ /dev/null
@@ -1,1549 +0,0 @@
-<?php
-/**
- * Base classes for dumps and export
- *
- * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
- * https://www.mediawiki.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- * http://www.gnu.org/copyleft/gpl.html
- *
- * @file
- */
-
-/**
- * @defgroup Dump Dump
- */
-
-/**
- * @ingroup SpecialPage Dump
- */
-class WikiExporter {
-       /** @var bool Return distinct author list (when not returning full history) */
-       public $list_authors = false;
-
-       /** @var bool */
-       public $dumpUploads = false;
-
-       /** @var bool */
-       public $dumpUploadFileContents = false;
-
-       /** @var string */
-       public $author_list = "";
-
-       const FULL = 1;
-       const CURRENT = 2;
-       const STABLE = 4; // extension defined
-       const LOGS = 8;
-       const RANGE = 16;
-
-       const BUFFER = 0;
-       const STREAM = 1;
-
-       const TEXT = 0;
-       const STUB = 1;
-
-       /** @var int */
-       public $buffer;
-
-       /** @var int */
-       public $text;
-
-       /** @var DumpOutput */
-       public $sink;
-
-       /**
-        * Returns the export schema version.
-        * @return string
-        */
-       public static function schemaVersion() {
-               return "0.10";
-       }
-
-       /**
-        * If using WikiExporter::STREAM to stream a large amount of data,
-        * provide a database connection which is not managed by
-        * LoadBalancer to read from: some history blob types will
-        * make additional queries to pull source data while the
-        * main query is still running.
-        *
-        * @param IDatabase $db
-        * @param int|array $history One of WikiExporter::FULL, WikiExporter::CURRENT,
-        *   WikiExporter::RANGE or WikiExporter::STABLE, or an associative array:
-        *   - offset: non-inclusive offset at which to start the query
-        *   - limit: maximum number of rows to return
-        *   - dir: "asc" or "desc" timestamp order
-        * @param int $buffer One of WikiExporter::BUFFER or WikiExporter::STREAM
-        * @param int $text One of WikiExporter::TEXT or WikiExporter::STUB
-        */
-       function __construct( $db, $history = WikiExporter::CURRENT,
-                       $buffer = WikiExporter::BUFFER, $text = WikiExporter::TEXT ) {
-               $this->db = $db;
-               $this->history = $history;
-               $this->buffer = $buffer;
-               $this->writer = new XmlDumpWriter();
-               $this->sink = new DumpOutput();
-               $this->text = $text;
-       }
-
-       /**
-        * Set the DumpOutput or DumpFilter object which will receive
-        * various row objects and XML output for filtering. Filters
-        * can be chained or used as callbacks.
-        *
-        * @param DumpOutput $sink
-        */
-       public function setOutputSink( &$sink ) {
-               $this->sink =& $sink;
-       }
-
-       public function openStream() {
-               $output = $this->writer->openStream();
-               $this->sink->writeOpenStream( $output );
-       }
-
-       public function closeStream() {
-               $output = $this->writer->closeStream();
-               $this->sink->writeCloseStream( $output );
-       }
-
-       /**
-        * Dumps a series of page and revision records for all pages
-        * in the database, either including complete history or only
-        * the most recent version.
-        */
-       public function allPages() {
-               $this->dumpFrom( '' );
-       }
-
-       /**
-        * Dumps a series of page and revision records for those pages
-        * in the database falling within the page_id range given.
-        * @param int $start Inclusive lower limit (this id is included)
-        * @param int $end Exclusive upper limit (this id is not included)
-        *   If 0, no upper limit.
-        */
-       public function pagesByRange( $start, $end ) {
-               $condition = 'page_id >= ' . intval( $start );
-               if ( $end ) {
-                       $condition .= ' AND page_id < ' . intval( $end );
-               }
-               $this->dumpFrom( $condition );
-       }
-
-       /**
-        * Dumps a series of page and revision records for those pages
-        * in the database with revisions falling within the rev_id range given.
-        * @param int $start Inclusive lower limit (this id is included)
-        * @param int $end Exclusive upper limit (this id is not included)
-        *   If 0, no upper limit.
-        */
-       public function revsByRange( $start, $end ) {
-               $condition = 'rev_id >= ' . intval( $start );
-               if ( $end ) {
-                       $condition .= ' AND rev_id < ' . intval( $end );
-               }
-               $this->dumpFrom( $condition );
-       }
-
-       /**
-        * @param Title $title
-        */
-       public function pageByTitle( $title ) {
-               $this->dumpFrom(
-                       'page_namespace=' . $title->getNamespace() .
-                       ' AND page_title=' . $this->db->addQuotes( $title->getDBkey() ) );
-       }
-
-       /**
-        * @param string $name
-        * @throws MWException
-        */
-       public function pageByName( $name ) {
-               $title = Title::newFromText( $name );
-               if ( is_null( $title ) ) {
-                       throw new MWException( "Can't export invalid title" );
-               } else {
-                       $this->pageByTitle( $title );
-               }
-       }
-
-       /**
-        * @param array $names
-        */
-       public function pagesByName( $names ) {
-               foreach ( $names as $name ) {
-                       $this->pageByName( $name );
-               }
-       }
-
-       public function allLogs() {
-               $this->dumpFrom( '' );
-       }
-
-       /**
-        * @param int $start
-        * @param int $end
-        */
-       public function logsByRange( $start, $end ) {
-               $condition = 'log_id >= ' . intval( $start );
-               if ( $end ) {
-                       $condition .= ' AND log_id < ' . intval( $end );
-               }
-               $this->dumpFrom( $condition );
-       }
-
-       /**
-        * Generates the distinct list of authors of an article
-        * Not called by default (depends on $this->list_authors)
-        * Can be set by Special:Export when not exporting whole history
-        *
-        * @param array $cond
-        */
-       protected function do_list_authors( $cond ) {
-               $this->author_list = "<contributors>";
-               // rev_deleted
-
-               $res = $this->db->select(
-                       array( 'page', 'revision' ),
-                       array( 'DISTINCT rev_user_text', 'rev_user' ),
-                       array(
-                               $this->db->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0',
-                               $cond,
-                               'page_id = rev_id',
-                       ),
-                       __METHOD__
-               );
-
-               foreach ( $res as $row ) {
-                       $this->author_list .= "<contributor>" .
-                               "<username>" .
-                               htmlentities( $row->rev_user_text ) .
-                               "</username>" .
-                               "<id>" .
-                               $row->rev_user .
-                               "</id>" .
-                               "</contributor>";
-               }
-               $this->author_list .= "</contributors>";
-       }
-
-       /**
-        * @param string $cond
-        * @throws MWException
-        * @throws Exception
-        */
-       protected function dumpFrom( $cond = '' ) {
-               # For logging dumps...
-               if ( $this->history & self::LOGS ) {
-                       $where = array( 'user_id = log_user' );
-                       # Hide private logs
-                       $hideLogs = LogEventsList::getExcludeClause( $this->db );
-                       if ( $hideLogs ) {
-                               $where[] = $hideLogs;
-                       }
-                       # Add on any caller specified conditions
-                       if ( $cond ) {
-                               $where[] = $cond;
-                       }
-                       # Get logging table name for logging.* clause
-                       $logging = $this->db->tableName( 'logging' );
-
-                       if ( $this->buffer == WikiExporter::STREAM ) {
-                               $prev = $this->db->bufferResults( false );
-                       }
-                       $result = null; // Assuring $result is not undefined, if exception occurs early
-                       try {
-                               $result = $this->db->select( array( 'logging', 'user' ),
-                                       array( "{$logging}.*", 'user_name' ), // grab the user name
-                                       $where,
-                                       __METHOD__,
-                                       array( 'ORDER BY' => 'log_id', 'USE INDEX' => array( 'logging' => 'PRIMARY' ) )
-                               );
-                               $this->outputLogStream( $result );
-                               if ( $this->buffer == WikiExporter::STREAM ) {
-                                       $this->db->bufferResults( $prev );
-                               }
-                       } catch ( Exception $e ) {
-                               // Throwing the exception does not reliably free the resultset, and
-                               // would also leave the connection in unbuffered mode.
-
-                               // Freeing result
-                               try {
-                                       if ( $result ) {
-                                               $result->free();
-                                       }
-                               } catch ( Exception $e2 ) {
-                                       // Already in panic mode -> ignoring $e2 as $e has
-                                       // higher priority
-                               }
-
-                               // Putting database back in previous buffer mode
-                               try {
-                                       if ( $this->buffer == WikiExporter::STREAM ) {
-                                               $this->db->bufferResults( $prev );
-                                       }
-                               } catch ( Exception $e2 ) {
-                                       // Already in panic mode -> ignoring $e2 as $e has
-                                       // higher priority
-                               }
-
-                               // Inform caller about problem
-                               throw $e;
-                       }
-               # For page dumps...
-               } else {
-                       $tables = array( 'page', 'revision' );
-                       $opts = array( 'ORDER BY' => 'page_id ASC' );
-                       $opts['USE INDEX'] = array();
-                       $join = array();
-                       if ( is_array( $this->history ) ) {
-                               # Time offset/limit for all pages/history...
-                               $revJoin = 'page_id=rev_page';
-                               # Set time order
-                               if ( $this->history['dir'] == 'asc' ) {
-                                       $op = '>';
-                                       $opts['ORDER BY'] = 'rev_timestamp ASC';
-                               } else {
-                                       $op = '<';
-                                       $opts['ORDER BY'] = 'rev_timestamp DESC';
-                               }
-                               # Set offset
-                               if ( !empty( $this->history['offset'] ) ) {
-                                       $revJoin .= " AND rev_timestamp $op " .
-                                               $this->db->addQuotes( $this->db->timestamp( $this->history['offset'] ) );
-                               }
-                               $join['revision'] = array( 'INNER JOIN', $revJoin );
-                               # Set query limit
-                               if ( !empty( $this->history['limit'] ) ) {
-                                       $opts['LIMIT'] = intval( $this->history['limit'] );
-                               }
-                       } elseif ( $this->history & WikiExporter::FULL ) {
-                               # Full history dumps...
-                               $join['revision'] = array( 'INNER JOIN', 'page_id=rev_page' );
-                       } elseif ( $this->history & WikiExporter::CURRENT ) {
-                               # Latest revision dumps...
-                               if ( $this->list_authors && $cond != '' ) { // List authors, if so desired
-                                       $this->do_list_authors( $cond );
-                               }
-                               $join['revision'] = array( 'INNER JOIN', 'page_id=rev_page AND page_latest=rev_id' );
-                       } elseif ( $this->history & WikiExporter::STABLE ) {
-                               # "Stable" revision dumps...
-                               # Default JOIN, to be overridden...
-                               $join['revision'] = array( 'INNER JOIN', 'page_id=rev_page AND page_latest=rev_id' );
-                               # One, and only one hook should set this, and return false
-                               if ( Hooks::run( 'WikiExporter::dumpStableQuery', array( &$tables, &$opts, &$join ) ) ) {
-                                       throw new MWException( __METHOD__ . " given invalid history dump type." );
-                               }
-                       } elseif ( $this->history & WikiExporter::RANGE ) {
-                               # Dump of revisions within a specified range
-                               $join['revision'] = array( 'INNER JOIN', 'page_id=rev_page' );
-                               $opts['ORDER BY'] = array( 'rev_page ASC', 'rev_id ASC' );
-                       } else {
-                               # Unknown history specification parameter?
-                               throw new MWException( __METHOD__ . " given invalid history dump type." );
-                       }
-                       # Query optimization hacks
-                       if ( $cond == '' ) {
-                               $opts[] = 'STRAIGHT_JOIN';
-                               $opts['USE INDEX']['page'] = 'PRIMARY';
-                       }
-                       # Build text join options
-                       if ( $this->text != WikiExporter::STUB ) { // 1-pass
-                               $tables[] = 'text';
-                               $join['text'] = array( 'INNER JOIN', 'rev_text_id=old_id' );
-                       }
-
-                       if ( $this->buffer == WikiExporter::STREAM ) {
-                               $prev = $this->db->bufferResults( false );
-                       }
-
-                       $result = null; // Assuring $result is not undefined, if exception occurs early
-                       try {
-                               Hooks::run( 'ModifyExportQuery',
-                                               array( $this->db, &$tables, &$cond, &$opts, &$join ) );
-
-                               # Do the query!
-                               $result = $this->db->select( $tables, '*', $cond, __METHOD__, $opts, $join );
-                               # Output dump results
-                               $this->outputPageStream( $result );
-
-                               if ( $this->buffer == WikiExporter::STREAM ) {
-                                       $this->db->bufferResults( $prev );
-                               }
-                       } catch ( Exception $e ) {
-                               // Throwing the exception does not reliably free the resultset, and
-                               // would also leave the connection in unbuffered mode.
-
-                               // Freeing result
-                               try {
-                                       if ( $result ) {
-                                               $result->free();
-                                       }
-                               } catch ( Exception $e2 ) {
-                                       // Already in panic mode -> ignoring $e2 as $e has
-                                       // higher priority
-                               }
-
-                               // Putting database back in previous buffer mode
-                               try {
-                                       if ( $this->buffer == WikiExporter::STREAM ) {
-                                               $this->db->bufferResults( $prev );
-                                       }
-                               } catch ( Exception $e2 ) {
-                                       // Already in panic mode -> ignoring $e2 as $e has
-                                       // higher priority
-                               }
-
-                               // Inform caller about problem
-                               throw $e;
-                       }
-               }
-       }
-
-       /**
-        * Runs through a query result set dumping page and revision records.
-        * The result set should be sorted/grouped by page to avoid duplicate
-        * page records in the output.
-        *
-        * Should be safe for
-        * streaming (non-buffered) queries, as long as it was made on a
-        * separate database connection not managed by LoadBalancer; some
-        * blob storage types will make queries to pull source data.
-        *
-        * @param ResultWrapper $resultset
-        */
-       protected function outputPageStream( $resultset ) {
-               $last = null;
-               foreach ( $resultset as $row ) {
-                       if ( $last === null ||
-                               $last->page_namespace != $row->page_namespace ||
-                               $last->page_title != $row->page_title ) {
-                               if ( $last !== null ) {
-                                       $output = '';
-                                       if ( $this->dumpUploads ) {
-                                               $output .= $this->writer->writeUploads( $last, $this->dumpUploadFileContents );
-                                       }
-                                       $output .= $this->writer->closePage();
-                                       $this->sink->writeClosePage( $output );
-                               }
-                               $output = $this->writer->openPage( $row );
-                               $this->sink->writeOpenPage( $row, $output );
-                               $last = $row;
-                       }
-                       $output = $this->writer->writeRevision( $row );
-                       $this->sink->writeRevision( $row, $output );
-               }
-               if ( $last !== null ) {
-                       $output = '';
-                       if ( $this->dumpUploads ) {
-                               $output .= $this->writer->writeUploads( $last, $this->dumpUploadFileContents );
-                       }
-                       $output .= $this->author_list;
-                       $output .= $this->writer->closePage();
-                       $this->sink->writeClosePage( $output );
-               }
-       }
-
-       /**
-        * @param ResultWrapper $resultset
-        */
-       protected function outputLogStream( $resultset ) {
-               foreach ( $resultset as $row ) {
-                       $output = $this->writer->writeLogItem( $row );
-                       $this->sink->writeLogItem( $row, $output );
-               }
-       }
-}
-
-/**
- * @ingroup Dump
- */
-class XmlDumpWriter {
-       /**
-        * Opens the XML output stream's root "<mediawiki>" element.
-        * This does not include an xml directive, so is safe to include
-        * as a subelement in a larger XML stream. Namespace and XML Schema
-        * references are included.
-        *
-        * Output will be encoded in UTF-8.
-        *
-        * @return string
-        */
-       function openStream() {
-               global $wgLanguageCode;
-               $ver = WikiExporter::schemaVersion();
-               return Xml::element( 'mediawiki', array(
-                       'xmlns'              => "http://www.mediawiki.org/xml/export-$ver/",
-                       'xmlns:xsi'          => "http://www.w3.org/2001/XMLSchema-instance",
-                       /*
-                        * When a new version of the schema is created, it needs staging on mediawiki.org.
-                        * This requires a change in the operations/mediawiki-config git repo.
-                        *
-                        * Create a changeset like https://gerrit.wikimedia.org/r/#/c/149643/ in which
-                        * you copy in the new xsd file.
-                        *
-                        * After it is reviewed, merged and deployed (sync-docroot), the index.html needs purging.
-                        * echo "http://www.mediawiki.org/xml/index.html" | mwscript purgeList.php --wiki=aawiki
-                        */
-                       'xsi:schemaLocation' => "http://www.mediawiki.org/xml/export-$ver/ " .
-                               "http://www.mediawiki.org/xml/export-$ver.xsd",
-                       'version'            => $ver,
-                       'xml:lang'           => $wgLanguageCode ),
-                       null ) .
-                       "\n" .
-                       $this->siteInfo();
-       }
-
-       /**
-        * @return string
-        */
-       function siteInfo() {
-               $info = array(
-                       $this->sitename(),
-                       $this->dbname(),
-                       $this->homelink(),
-                       $this->generator(),
-                       $this->caseSetting(),
-                       $this->namespaces() );
-               return "  <siteinfo>\n    " .
-                       implode( "\n    ", $info ) .
-                       "\n  </siteinfo>\n";
-       }
-
-       /**
-        * @return string
-        */
-       function sitename() {
-               global $wgSitename;
-               return Xml::element( 'sitename', array(), $wgSitename );
-       }
-
-       /**
-        * @return string
-        */
-       function dbname() {
-               global $wgDBname;
-               return Xml::element( 'dbname', array(), $wgDBname );
-       }
-
-       /**
-        * @return string
-        */
-       function generator() {
-               global $wgVersion;
-               return Xml::element( 'generator', array(), "MediaWiki $wgVersion" );
-       }
-
-       /**
-        * @return string
-        */
-       function homelink() {
-               return Xml::element( 'base', array(), Title::newMainPage()->getCanonicalURL() );
-       }
-
-       /**
-        * @return string
-        */
-       function caseSetting() {
-               global $wgCapitalLinks;
-               // "case-insensitive" option is reserved for future
-               $sensitivity = $wgCapitalLinks ? 'first-letter' : 'case-sensitive';
-               return Xml::element( 'case', array(), $sensitivity );
-       }
-
-       /**
-        * @return string
-        */
-       function namespaces() {
-               global $wgContLang;
-               $spaces = "<namespaces>\n";
-               foreach ( $wgContLang->getFormattedNamespaces() as $ns => $title ) {
-                       $spaces .= '      ' .
-                               Xml::element( 'namespace',
-                                       array(
-                                               'key' => $ns,
-                                               'case' => MWNamespace::isCapitalized( $ns ) ? 'first-letter' : 'case-sensitive',
-                                       ), $title ) . "\n";
-               }
-               $spaces .= "    </namespaces>";
-               return $spaces;
-       }
-
-       /**
-        * Closes the output stream with the closing root element.
-        * Call when finished dumping things.
-        *
-        * @return string
-        */
-       function closeStream() {
-               return "</mediawiki>\n";
-       }
-
-       /**
-        * Opens a "<page>" section on the output stream, with data
-        * from the given database row.
-        *
-        * @param object $row
-        * @return string
-        */
-       public function openPage( $row ) {
-               $out = "  <page>\n";
-               $title = Title::makeTitle( $row->page_namespace, $row->page_title );
-               $out .= '    ' . Xml::elementClean( 'title', array(), self::canonicalTitle( $title ) ) . "\n";
-               $out .= '    ' . Xml::element( 'ns', array(), strval( $row->page_namespace ) ) . "\n";
-               $out .= '    ' . Xml::element( 'id', array(), strval( $row->page_id ) ) . "\n";
-               if ( $row->page_is_redirect ) {
-                       $page = WikiPage::factory( $title );
-                       $redirect = $page->getRedirectTarget();
-                       if ( $redirect instanceof Title && $redirect->isValidRedirectTarget() ) {
-                               $out .= '    ';
-                               $out .= Xml::element( 'redirect', array( 'title' => self::canonicalTitle( $redirect ) ) );
-                               $out .= "\n";
-                       }
-               }
-
-               if ( $row->page_restrictions != '' ) {
-                       $out .= '    ' . Xml::element( 'restrictions', array(),
-                               strval( $row->page_restrictions ) ) . "\n";
-               }
-
-               Hooks::run( 'XmlDumpWriterOpenPage', array( $this, &$out, $row, $title ) );
-
-               return $out;
-       }
-
-       /**
-        * Closes a "<page>" section on the output stream.
-        *
-        * @access private
-        * @return string
-        */
-       function closePage() {
-               return "  </page>\n";
-       }
-
-       /**
-        * Dumps a "<revision>" section on the output stream, with
-        * data filled in from the given database row.
-        *
-        * @param object $row
-        * @return string
-        * @access private
-        */
-       function writeRevision( $row ) {
-
-               $out = "    <revision>\n";
-               $out .= "      " . Xml::element( 'id', null, strval( $row->rev_id ) ) . "\n";
-               if ( isset( $row->rev_parent_id ) && $row->rev_parent_id ) {
-                       $out .= "      " . Xml::element( 'parentid', null, strval( $row->rev_parent_id ) ) . "\n";
-               }
-
-               $out .= $this->writeTimestamp( $row->rev_timestamp );
-
-               if ( isset( $row->rev_deleted ) && ( $row->rev_deleted & Revision::DELETED_USER ) ) {
-                       $out .= "      " . Xml::element( 'contributor', array( 'deleted' => 'deleted' ) ) . "\n";
-               } else {
-                       $out .= $this->writeContributor( $row->rev_user, $row->rev_user_text );
-               }
-
-               if ( isset( $row->rev_minor_edit ) && $row->rev_minor_edit ) {
-                       $out .= "      <minor/>\n";
-               }
-               if ( isset( $row->rev_deleted ) && ( $row->rev_deleted & Revision::DELETED_COMMENT ) ) {
-                       $out .= "      " . Xml::element( 'comment', array( 'deleted' => 'deleted' ) ) . "\n";
-               } elseif ( $row->rev_comment != '' ) {
-                       $out .= "      " . Xml::elementClean( 'comment', array(), strval( $row->rev_comment ) ) . "\n";
-               }
-
-               if ( isset( $row->rev_content_model ) && !is_null( $row->rev_content_model ) ) {
-                       $content_model = strval( $row->rev_content_model );
-               } else {
-                       // probably using $wgContentHandlerUseDB = false;
-                       $title = Title::makeTitle( $row->page_namespace, $row->page_title );
-                       $content_model = ContentHandler::getDefaultModelFor( $title );
-               }
-
-               $content_handler = ContentHandler::getForModelID( $content_model );
-
-               if ( isset( $row->rev_content_format ) && !is_null( $row->rev_content_format ) ) {
-                       $content_format = strval( $row->rev_content_format );
-               } else {
-                       // probably using $wgContentHandlerUseDB = false;
-                       $content_format = $content_handler->getDefaultFormat();
-               }
-
-               $out .= "      " . Xml::element( 'model', null, strval( $content_model ) ) . "\n";
-               $out .= "      " . Xml::element( 'format', null, strval( $content_format ) ) . "\n";
-
-               $text = '';
-               if ( isset( $row->rev_deleted ) && ( $row->rev_deleted & Revision::DELETED_TEXT ) ) {
-                       $out .= "      " . Xml::element( 'text', array( 'deleted' => 'deleted' ) ) . "\n";
-               } elseif ( isset( $row->old_text ) ) {
-                       // Raw text from the database may have invalid chars
-                       $text = strval( Revision::getRevisionText( $row ) );
-                       $text = $content_handler->exportTransform( $text, $content_format );
-                       $out .= "      " . Xml::elementClean( 'text',
-                               array( 'xml:space' => 'preserve', 'bytes' => intval( $row->rev_len ) ),
-                               strval( $text ) ) . "\n";
-               } else {
-                       // Stub output
-                       $out .= "      " . Xml::element( 'text',
-                               array( 'id' => $row->rev_text_id, 'bytes' => intval( $row->rev_len ) ),
-                               "" ) . "\n";
-               }
-
-               if ( isset( $row->rev_sha1 )
-                       && $row->rev_sha1
-                       && !( $row->rev_deleted & Revision::DELETED_TEXT )
-               ) {
-                       $out .= "      " . Xml::element( 'sha1', null, strval( $row->rev_sha1 ) ) . "\n";
-               } else {
-                       $out .= "      <sha1/>\n";
-               }
-
-               Hooks::run( 'XmlDumpWriterWriteRevision', array( &$this, &$out, $row, $text ) );
-
-               $out .= "    </revision>\n";
-
-               return $out;
-       }
-
-       /**
-        * Dumps a "<logitem>" section on the output stream, with
-        * data filled in from the given database row.
-        *
-        * @param object $row
-        * @return string
-        * @access private
-        */
-       function writeLogItem( $row ) {
-
-               $out = "  <logitem>\n";
-               $out .= "    " . Xml::element( 'id', null, strval( $row->log_id ) ) . "\n";
-
-               $out .= $this->writeTimestamp( $row->log_timestamp, "    " );
-
-               if ( $row->log_deleted & LogPage::DELETED_USER ) {
-                       $out .= "    " . Xml::element( 'contributor', array( 'deleted' => 'deleted' ) ) . "\n";
-               } else {
-                       $out .= $this->writeContributor( $row->log_user, $row->user_name, "    " );
-               }
-
-               if ( $row->log_deleted & LogPage::DELETED_COMMENT ) {
-                       $out .= "    " . Xml::element( 'comment', array( 'deleted' => 'deleted' ) ) . "\n";
-               } elseif ( $row->log_comment != '' ) {
-                       $out .= "    " . Xml::elementClean( 'comment', null, strval( $row->log_comment ) ) . "\n";
-               }
-
-               $out .= "    " . Xml::element( 'type', null, strval( $row->log_type ) ) . "\n";
-               $out .= "    " . Xml::element( 'action', null, strval( $row->log_action ) ) . "\n";
-
-               if ( $row->log_deleted & LogPage::DELETED_ACTION ) {
-                       $out .= "    " . Xml::element( 'text', array( 'deleted' => 'deleted' ) ) . "\n";
-               } else {
-                       $title = Title::makeTitle( $row->log_namespace, $row->log_title );
-                       $out .= "    " . Xml::elementClean( 'logtitle', null, self::canonicalTitle( $title ) ) . "\n";
-                       $out .= "    " . Xml::elementClean( 'params',
-                               array( 'xml:space' => 'preserve' ),
-                               strval( $row->log_params ) ) . "\n";
-               }
-
-               $out .= "  </logitem>\n";
-
-               return $out;
-       }
-
-       /**
-        * @param string $timestamp
-        * @param string $indent Default to six spaces
-        * @return string
-        */
-       function writeTimestamp( $timestamp, $indent = "      " ) {
-               $ts = wfTimestamp( TS_ISO_8601, $timestamp );
-               return $indent . Xml::element( 'timestamp', null, $ts ) . "\n";
-       }
-
-       /**
-        * @param int $id
-        * @param string $text
-        * @param string $indent Default to six spaces
-        * @return string
-        */
-       function writeContributor( $id, $text, $indent = "      " ) {
-               $out = $indent . "<contributor>\n";
-               if ( $id || !IP::isValid( $text ) ) {
-                       $out .= $indent . "  " . Xml::elementClean( 'username', null, strval( $text ) ) . "\n";
-                       $out .= $indent . "  " . Xml::element( 'id', null, strval( $id ) ) . "\n";
-               } else {
-                       $out .= $indent . "  " . Xml::elementClean( 'ip', null, strval( $text ) ) . "\n";
-               }
-               $out .= $indent . "</contributor>\n";
-               return $out;
-       }
-
-       /**
-        * Warning! This data is potentially inconsistent. :(
-        * @param object $row
-        * @param bool $dumpContents
-        * @return string
-        */
-       function writeUploads( $row, $dumpContents = false ) {
-               if ( $row->page_namespace == NS_FILE ) {
-                       $img = wfLocalFile( $row->page_title );
-                       if ( $img && $img->exists() ) {
-                               $out = '';
-                               foreach ( array_reverse( $img->getHistory() ) as $ver ) {
-                                       $out .= $this->writeUpload( $ver, $dumpContents );
-                               }
-                               $out .= $this->writeUpload( $img, $dumpContents );
-                               return $out;
-                       }
-               }
-               return '';
-       }
-
-       /**
-        * @param File $file
-        * @param bool $dumpContents
-        * @return string
-        */
-       function writeUpload( $file, $dumpContents = false ) {
-               if ( $file->isOld() ) {
-                       $archiveName = "      " .
-                               Xml::element( 'archivename', null, $file->getArchiveName() ) . "\n";
-               } else {
-                       $archiveName = '';
-               }
-               if ( $dumpContents ) {
-                       $be = $file->getRepo()->getBackend();
-                       # Dump file as base64
-                       # Uses only XML-safe characters, so does not need escaping
-                       # @todo Too bad this loads the contents into memory (script might swap)
-                       $contents = '      <contents encoding="base64">' .
-                               chunk_split( base64_encode(
-                                       $be->getFileContents( array( 'src' => $file->getPath() ) ) ) ) .
-                               "      </contents>\n";
-               } else {
-                       $contents = '';
-               }
-               if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
-                       $comment = Xml::element( 'comment', array( 'deleted' => 'deleted' ) );
-               } else {
-                       $comment = Xml::elementClean( 'comment', null, $file->getDescription() );
-               }
-               return "    <upload>\n" .
-                       $this->writeTimestamp( $file->getTimestamp() ) .
-                       $this->writeContributor( $file->getUser( 'id' ), $file->getUser( 'text' ) ) .
-                       "      " . $comment . "\n" .
-                       "      " . Xml::element( 'filename', null, $file->getName() ) . "\n" .
-                       $archiveName .
-                       "      " . Xml::element( 'src', null, $file->getCanonicalURL() ) . "\n" .
-                       "      " . Xml::element( 'size', null, $file->getSize() ) . "\n" .
-                       "      " . Xml::element( 'sha1base36', null, $file->getSha1() ) . "\n" .
-                       "      " . Xml::element( 'rel', null, $file->getRel() ) . "\n" .
-                       $contents .
-                       "    </upload>\n";
-       }
-
-       /**
-        * Return prefixed text form of title, but using the content language's
-        * canonical namespace. This skips any special-casing such as gendered
-        * user namespaces -- which while useful, are not yet listed in the
-        * XML "<siteinfo>" data so are unsafe in export.
-        *
-        * @param Title $title
-        * @return string
-        * @since 1.18
-        */
-       public static function canonicalTitle( Title $title ) {
-               if ( $title->isExternal() ) {
-                       return $title->getPrefixedText();
-               }
-
-               global $wgContLang;
-               $prefix = $wgContLang->getFormattedNsText( $title->getNamespace() );
-
-               if ( $prefix !== '' ) {
-                       $prefix .= ':';
-               }
-
-               return $prefix . $title->getText();
-       }
-}
-
-/**
- * Base class for output stream; prints to stdout or buffer or wherever.
- * @ingroup Dump
- */
-class DumpOutput {
-
-       /**
-        * @param string $string
-        */
-       function writeOpenStream( $string ) {
-               $this->write( $string );
-       }
-
-       /**
-        * @param string $string
-        */
-       function writeCloseStream( $string ) {
-               $this->write( $string );
-       }
-
-       /**
-        * @param object $page
-        * @param string $string
-        */
-       function writeOpenPage( $page, $string ) {
-               $this->write( $string );
-       }
-
-       /**
-        * @param string $string
-        */
-       function writeClosePage( $string ) {
-               $this->write( $string );
-       }
-
-       /**
-        * @param object $rev
-        * @param string $string
-        */
-       function writeRevision( $rev, $string ) {
-               $this->write( $string );
-       }
-
-       /**
-        * @param object $rev
-        * @param string $string
-        */
-       function writeLogItem( $rev, $string ) {
-               $this->write( $string );
-       }
-
-       /**
-        * Override to write to a different stream type.
-        * @param string $string
-        * @return bool
-        */
-       function write( $string ) {
-               print $string;
-       }
-
-       /**
-        * Close the old file, move it to a specified name,
-        * and reopen new file with the old name. Use this
-        * for writing out a file in multiple pieces
-        * at specified checkpoints (e.g. every n hours).
-        * @param string|array $newname File name. May be a string or an array with one element
-        */
-       function closeRenameAndReopen( $newname ) {
-       }
-
-       /**
-        * Close the old file, and move it to a specified name.
-        * Use this for the last piece of a file written out
-        * at specified checkpoints (e.g. every n hours).
-        * @param string|array $newname File name. May be a string or an array with one element
-        * @param bool $open If true, a new file with the old filename will be opened
-        *   again for writing (default: false)
-        */
-       function closeAndRename( $newname, $open = false ) {
-       }
-
-       /**
-        * Returns the name of the file or files which are
-        * being written to, if there are any.
-        * @return null
-        */
-       function getFilenames() {
-               return null;
-       }
-}
-
-/**
- * Stream outputter to send data to a file.
- * @ingroup Dump
- */
-class DumpFileOutput extends DumpOutput {
-       protected $handle = false, $filename;
-
-       /**
-        * @param string $file
-        */
-       function __construct( $file ) {
-               $this->handle = fopen( $file, "wt" );
-               $this->filename = $file;
-       }
-
-       /**
-        * @param string $string
-        */
-       function writeCloseStream( $string ) {
-               parent::writeCloseStream( $string );
-               if ( $this->handle ) {
-                       fclose( $this->handle );
-                       $this->handle = false;
-               }
-       }
-
-       /**
-        * @param string $string
-        */
-       function write( $string ) {
-               fputs( $this->handle, $string );
-       }
-
-       /**
-        * @param string $newname
-        */
-       function closeRenameAndReopen( $newname ) {
-               $this->closeAndRename( $newname, true );
-       }
-
-       /**
-        * @param string $newname
-        * @throws MWException
-        */
-       function renameOrException( $newname ) {
-                       if ( !rename( $this->filename, $newname ) ) {
-                               throw new MWException( __METHOD__ . ": rename of file {$this->filename} to $newname failed\n" );
-                       }
-       }
-
-       /**
-        * @param array $newname
-        * @return string
-        * @throws MWException
-        */
-       function checkRenameArgCount( $newname ) {
-               if ( is_array( $newname ) ) {
-                       if ( count( $newname ) > 1 ) {
-                               throw new MWException( __METHOD__ . ": passed multiple arguments for rename of single file\n" );
-                       } else {
-                               $newname = $newname[0];
-                       }
-               }
-               return $newname;
-       }
-
-       /**
-        * @param string $newname
-        * @param bool $open
-        */
-       function closeAndRename( $newname, $open = false ) {
-               $newname = $this->checkRenameArgCount( $newname );
-               if ( $newname ) {
-                       if ( $this->handle ) {
-                               fclose( $this->handle );
-                               $this->handle = false;
-                       }
-                       $this->renameOrException( $newname );
-                       if ( $open ) {
-                               $this->handle = fopen( $this->filename, "wt" );
-                       }
-               }
-       }
-
-       /**
-        * @return string|null
-        */
-       function getFilenames() {
-               return $this->filename;
-       }
-}
-
-/**
- * Stream outputter to send data to a file via some filter program.
- * Even if compression is available in a library, using a separate
- * program can allow us to make use of a multi-processor system.
- * @ingroup Dump
- */
-class DumpPipeOutput extends DumpFileOutput {
-       protected $command, $filename;
-       protected $procOpenResource = false;
-
-       /**
-        * @param string $command
-        * @param string $file
-        */
-       function __construct( $command, $file = null ) {
-               if ( !is_null( $file ) ) {
-                       $command .= " > " . wfEscapeShellArg( $file );
-               }
-
-               $this->startCommand( $command );
-               $this->command = $command;
-               $this->filename = $file;
-       }
-
-       /**
-        * @param string $string
-        */
-       function writeCloseStream( $string ) {
-               parent::writeCloseStream( $string );
-               if ( $this->procOpenResource ) {
-                       proc_close( $this->procOpenResource );
-                       $this->procOpenResource = false;
-               }
-       }
-
-       /**
-        * @param string $command
-        */
-       function startCommand( $command ) {
-               $spec = array(
-                       0 => array( "pipe", "r" ),
-               );
-               $pipes = array();
-               $this->procOpenResource = proc_open( $command, $spec, $pipes );
-               $this->handle = $pipes[0];
-       }
-
-       /**
-        * @param string $newname
-        */
-       function closeRenameAndReopen( $newname ) {
-               $this->closeAndRename( $newname, true );
-       }
-
-       /**
-        * @param string $newname
-        * @param bool $open
-        */
-       function closeAndRename( $newname, $open = false ) {
-               $newname = $this->checkRenameArgCount( $newname );
-               if ( $newname ) {
-                       if ( $this->handle ) {
-                               fclose( $this->handle );
-                               $this->handle = false;
-                       }
-                       if ( $this->procOpenResource ) {
-                               proc_close( $this->procOpenResource );
-                               $this->procOpenResource = false;
-                       }
-                       $this->renameOrException( $newname );
-                       if ( $open ) {
-                               $command = $this->command;
-                               $command .= " > " . wfEscapeShellArg( $this->filename );
-                               $this->startCommand( $command );
-                       }
-               }
-       }
-}
-
-/**
- * Sends dump output via the gzip compressor.
- * @ingroup Dump
- */
-class DumpGZipOutput extends DumpPipeOutput {
-       /**
-        * @param string $file
-        */
-       function __construct( $file ) {
-               parent::__construct( "gzip", $file );
-       }
-}
-
-/**
- * Sends dump output via the bgzip2 compressor.
- * @ingroup Dump
- */
-class DumpBZip2Output extends DumpPipeOutput {
-       /**
-        * @param string $file
-        */
-       function __construct( $file ) {
-               parent::__construct( "bzip2", $file );
-       }
-}
-
-/**
- * Sends dump output via the p7zip compressor.
- * @ingroup Dump
- */
-class Dump7ZipOutput extends DumpPipeOutput {
-       /**
-        * @param string $file
-        */
-       function __construct( $file ) {
-               $command = $this->setup7zCommand( $file );
-               parent::__construct( $command );
-               $this->filename = $file;
-       }
-
-       /**
-        * @param string $file
-        * @return string
-        */
-       function setup7zCommand( $file ) {
-               $command = "7za a -bd -si -mx=4 " . wfEscapeShellArg( $file );
-               // Suppress annoying useless crap from p7zip
-               // Unfortunately this could suppress real error messages too
-               $command .= ' >' . wfGetNull() . ' 2>&1';
-               return $command;
-       }
-
-       /**
-        * @param string $newname
-        * @param bool $open
-        */
-       function closeAndRename( $newname, $open = false ) {
-               $newname = $this->checkRenameArgCount( $newname );
-               if ( $newname ) {
-                       fclose( $this->handle );
-                       proc_close( $this->procOpenResource );
-                       $this->renameOrException( $newname );
-                       if ( $open ) {
-                               $command = $this->setup7zCommand( $this->filename );
-                               $this->startCommand( $command );
-                       }
-               }
-       }
-}
-
-/**
- * Dump output filter class.
- * This just does output filtering and streaming; XML formatting is done
- * higher up, so be careful in what you do.
- * @ingroup Dump
- */
-class DumpFilter {
-       /**
-        * @var DumpOutput
-        * FIXME will need to be made protected whenever legacy code
-        * is updated.
-        */
-       public $sink;
-
-       /**
-        * @var bool
-        */
-       protected $sendingThisPage;
-
-       /**
-        * @param DumpOutput $sink
-        */
-       function __construct( &$sink ) {
-               $this->sink =& $sink;
-       }
-
-       /**
-        * @param string $string
-        */
-       function writeOpenStream( $string ) {
-               $this->sink->writeOpenStream( $string );
-       }
-
-       /**
-        * @param string $string
-        */
-       function writeCloseStream( $string ) {
-               $this->sink->writeCloseStream( $string );
-       }
-
-       /**
-        * @param object $page
-        * @param string $string
-        */
-       function writeOpenPage( $page, $string ) {
-               $this->sendingThisPage = $this->pass( $page, $string );
-               if ( $this->sendingThisPage ) {
-                       $this->sink->writeOpenPage( $page, $string );
-               }
-       }
-
-       /**
-        * @param string $string
-        */
-       function writeClosePage( $string ) {
-               if ( $this->sendingThisPage ) {
-                       $this->sink->writeClosePage( $string );
-                       $this->sendingThisPage = false;
-               }
-       }
-
-       /**
-        * @param object $rev
-        * @param string $string
-        */
-       function writeRevision( $rev, $string ) {
-               if ( $this->sendingThisPage ) {
-                       $this->sink->writeRevision( $rev, $string );
-               }
-       }
-
-       /**
-        * @param object $rev
-        * @param string $string
-        */
-       function writeLogItem( $rev, $string ) {
-               $this->sink->writeRevision( $rev, $string );
-       }
-
-       /**
-        * @param string $newname
-        */
-       function closeRenameAndReopen( $newname ) {
-               $this->sink->closeRenameAndReopen( $newname );
-       }
-
-       /**
-        * @param string $newname
-        * @param bool $open
-        */
-       function closeAndRename( $newname, $open = false ) {
-               $this->sink->closeAndRename( $newname, $open );
-       }
-
-       /**
-        * @return array
-        */
-       function getFilenames() {
-               return $this->sink->getFilenames();
-       }
-
-       /**
-        * Override for page-based filter types.
-        * @param object $page
-        * @return bool
-        */
-       function pass( $page ) {
-               return true;
-       }
-}
-
-/**
- * Simple dump output filter to exclude all talk pages.
- * @ingroup Dump
- */
-class DumpNotalkFilter extends DumpFilter {
-       /**
-        * @param object $page
-        * @return bool
-        */
-       function pass( $page ) {
-               return !MWNamespace::isTalk( $page->page_namespace );
-       }
-}
-
-/**
- * Dump output filter to include or exclude pages in a given set of namespaces.
- * @ingroup Dump
- */
-class DumpNamespaceFilter extends DumpFilter {
-       /** @var bool */
-       public $invert = false;
-
-       /** @var array */
-       public $namespaces = array();
-
-       /**
-        * @param DumpOutput $sink
-        * @param array $param
-        * @throws MWException
-        */
-       function __construct( &$sink, $param ) {
-               parent::__construct( $sink );
-
-               $constants = array(
-                       "NS_MAIN"           => NS_MAIN,
-                       "NS_TALK"           => NS_TALK,
-                       "NS_USER"           => NS_USER,
-                       "NS_USER_TALK"      => NS_USER_TALK,
-                       "NS_PROJECT"        => NS_PROJECT,
-                       "NS_PROJECT_TALK"   => NS_PROJECT_TALK,
-                       "NS_FILE"           => NS_FILE,
-                       "NS_FILE_TALK"      => NS_FILE_TALK,
-                       "NS_IMAGE"          => NS_IMAGE, // NS_IMAGE is an alias for NS_FILE
-                       "NS_IMAGE_TALK"     => NS_IMAGE_TALK,
-                       "NS_MEDIAWIKI"      => NS_MEDIAWIKI,
-                       "NS_MEDIAWIKI_TALK" => NS_MEDIAWIKI_TALK,
-                       "NS_TEMPLATE"       => NS_TEMPLATE,
-                       "NS_TEMPLATE_TALK"  => NS_TEMPLATE_TALK,
-                       "NS_HELP"           => NS_HELP,
-                       "NS_HELP_TALK"      => NS_HELP_TALK,
-                       "NS_CATEGORY"       => NS_CATEGORY,
-                       "NS_CATEGORY_TALK"  => NS_CATEGORY_TALK );
-
-               if ( $param { 0 } == '!' ) {
-                       $this->invert = true;
-                       $param = substr( $param, 1 );
-               }
-
-               foreach ( explode( ',', $param ) as $key ) {
-                       $key = trim( $key );
-                       if ( isset( $constants[$key] ) ) {
-                               $ns = $constants[$key];
-                               $this->namespaces[$ns] = true;
-                       } elseif ( is_numeric( $key ) ) {
-                               $ns = intval( $key );
-                               $this->namespaces[$ns] = true;
-                       } else {
-                               throw new MWException( "Unrecognized namespace key '$key'\n" );
-                       }
-               }
-       }
-
-       /**
-        * @param object $page
-        * @return bool
-        */
-       function pass( $page ) {
-               $match = isset( $this->namespaces[$page->page_namespace] );
-               return $this->invert xor $match;
-       }
-}
-
-/**
- * Dump output filter to include only the last revision in each page sequence.
- * @ingroup Dump
- */
-class DumpLatestFilter extends DumpFilter {
-       public $page;
-
-       public $pageString;
-
-       public $rev;
-
-       public $revString;
-
-       /**
-        * @param object $page
-        * @param string $string
-        */
-       function writeOpenPage( $page, $string ) {
-               $this->page = $page;
-               $this->pageString = $string;
-       }
-
-       /**
-        * @param string $string
-        */
-       function writeClosePage( $string ) {
-               if ( $this->rev ) {
-                       $this->sink->writeOpenPage( $this->page, $this->pageString );
-                       $this->sink->writeRevision( $this->rev, $this->revString );
-                       $this->sink->writeClosePage( $string );
-               }
-               $this->rev = null;
-               $this->revString = null;
-               $this->page = null;
-               $this->pageString = null;
-       }
-
-       /**
-        * @param object $rev
-        * @param string $string
-        */
-       function writeRevision( $rev, $string ) {
-               if ( $rev->rev_id == $this->page->page_latest ) {
-                       $this->rev = $rev;
-                       $this->revString = $string;
-               }
-       }
-}
-
-/**
- * Base class for output stream; prints to stdout or buffer or wherever.
- * @ingroup Dump
- */
-class DumpMultiWriter {
-
-       /**
-        * @param array $sinks
-        */
-       function __construct( $sinks ) {
-               $this->sinks = $sinks;
-               $this->count = count( $sinks );
-       }
-
-       /**
-        * @param string $string
-        */
-       function writeOpenStream( $string ) {
-               for ( $i = 0; $i < $this->count; $i++ ) {
-                       $this->sinks[$i]->writeOpenStream( $string );
-               }
-       }
-
-       /**
-        * @param string $string
-        */
-       function writeCloseStream( $string ) {
-               for ( $i = 0; $i < $this->count; $i++ ) {
-                       $this->sinks[$i]->writeCloseStream( $string );
-               }
-       }
-
-       /**
-        * @param object $page
-        * @param string $string
-        */
-       function writeOpenPage( $page, $string ) {
-               for ( $i = 0; $i < $this->count; $i++ ) {
-                       $this->sinks[$i]->writeOpenPage( $page, $string );
-               }
-       }
-
-       /**
-        * @param string $string
-        */
-       function writeClosePage( $string ) {
-               for ( $i = 0; $i < $this->count; $i++ ) {
-                       $this->sinks[$i]->writeClosePage( $string );
-               }
-       }
-
-       /**
-        * @param object $rev
-        * @param string $string
-        */
-       function writeRevision( $rev, $string ) {
-               for ( $i = 0; $i < $this->count; $i++ ) {
-                       $this->sinks[$i]->writeRevision( $rev, $string );
-               }
-       }
-
-       /**
-        * @param array $newnames
-        */
-       function closeRenameAndReopen( $newnames ) {
-               $this->closeAndRename( $newnames, true );
-       }
-
-       /**
-        * @param array $newnames
-        * @param bool $open
-        */
-       function closeAndRename( $newnames, $open = false ) {
-               for ( $i = 0; $i < $this->count; $i++ ) {
-                       $this->sinks[$i]->closeAndRename( $newnames[$i], $open );
-               }
-       }
-
-       /**
-        * @return array
-        */
-       function getFilenames() {
-               $filenames = array();
-               for ( $i = 0; $i < $this->count; $i++ ) {
-                       $filenames[] = $this->sinks[$i]->getFilenames();
-               }
-               return $filenames;
-       }
-}
diff --git a/includes/export/Dump7ZipOutput.php b/includes/export/Dump7ZipOutput.php
new file mode 100644 (file)
index 0000000..ec7a6b2
--- /dev/null
@@ -0,0 +1,67 @@
+<?php
+/**
+ * Sends dump output via the p7zip compressor.
+ *
+ * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
+ * https://www.mediawiki.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * @ingroup Dump
+ */
+class Dump7ZipOutput extends DumpPipeOutput {
+       /**
+        * @param string $file
+        */
+       function __construct( $file ) {
+               $command = $this->setup7zCommand( $file );
+               parent::__construct( $command );
+               $this->filename = $file;
+       }
+
+       /**
+        * @param string $file
+        * @return string
+        */
+       function setup7zCommand( $file ) {
+               $command = "7za a -bd -si -mx=4 " . wfEscapeShellArg( $file );
+               // Suppress annoying useless crap from p7zip
+               // Unfortunately this could suppress real error messages too
+               $command .= ' >' . wfGetNull() . ' 2>&1';
+               return $command;
+       }
+
+       /**
+        * @param string $newname
+        * @param bool $open
+        */
+       function closeAndRename( $newname, $open = false ) {
+               $newname = $this->checkRenameArgCount( $newname );
+               if ( $newname ) {
+                       fclose( $this->handle );
+                       proc_close( $this->procOpenResource );
+                       $this->renameOrException( $newname );
+                       if ( $open ) {
+                               $command = $this->setup7zCommand( $this->filename );
+                               $this->startCommand( $command );
+                       }
+               }
+       }
+}
diff --git a/includes/export/DumpBZip2Output.php b/includes/export/DumpBZip2Output.php
new file mode 100644 (file)
index 0000000..8767b92
--- /dev/null
@@ -0,0 +1,36 @@
+<?php
+/**
+ * Sends dump output via the bgzip2 compressor.
+ *
+ * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
+ * https://www.mediawiki.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * @ingroup Dump
+ */
+class DumpBZip2Output extends DumpPipeOutput {
+       /**
+        * @param string $file
+        */
+       function __construct( $file ) {
+               parent::__construct( "bzip2", $file );
+       }
+}
diff --git a/includes/export/DumpFileOutput.php b/includes/export/DumpFileOutput.php
new file mode 100644 (file)
index 0000000..de1c0a5
--- /dev/null
@@ -0,0 +1,115 @@
+<?php
+/**
+ * Stream outputter to send data to a file.
+ *
+ * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
+ * https://www.mediawiki.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * @ingroup Dump
+ */
+class DumpFileOutput extends DumpOutput {
+       protected $handle = false, $filename;
+
+       /**
+        * @param string $file
+        */
+       function __construct( $file ) {
+               $this->handle = fopen( $file, "wt" );
+               $this->filename = $file;
+       }
+
+       /**
+        * @param string $string
+        */
+       function writeCloseStream( $string ) {
+               parent::writeCloseStream( $string );
+               if ( $this->handle ) {
+                       fclose( $this->handle );
+                       $this->handle = false;
+               }
+       }
+
+       /**
+        * @param string $string
+        */
+       function write( $string ) {
+               fputs( $this->handle, $string );
+       }
+
+       /**
+        * @param string $newname
+        */
+       function closeRenameAndReopen( $newname ) {
+               $this->closeAndRename( $newname, true );
+       }
+
+       /**
+        * @param string $newname
+        * @throws MWException
+        */
+       function renameOrException( $newname ) {
+                       if ( !rename( $this->filename, $newname ) ) {
+                               throw new MWException( __METHOD__ . ": rename of file {$this->filename} to $newname failed\n" );
+                       }
+       }
+
+       /**
+        * @param array $newname
+        * @return string
+        * @throws MWException
+        */
+       function checkRenameArgCount( $newname ) {
+               if ( is_array( $newname ) ) {
+                       if ( count( $newname ) > 1 ) {
+                               throw new MWException( __METHOD__ . ": passed multiple arguments for rename of single file\n" );
+                       } else {
+                               $newname = $newname[0];
+                       }
+               }
+               return $newname;
+       }
+
+       /**
+        * @param string $newname
+        * @param bool $open
+        */
+       function closeAndRename( $newname, $open = false ) {
+               $newname = $this->checkRenameArgCount( $newname );
+               if ( $newname ) {
+                       if ( $this->handle ) {
+                               fclose( $this->handle );
+                               $this->handle = false;
+                       }
+                       $this->renameOrException( $newname );
+                       if ( $open ) {
+                               $this->handle = fopen( $this->filename, "wt" );
+                       }
+               }
+       }
+
+       /**
+        * @return string|null
+        */
+       function getFilenames() {
+               return $this->filename;
+       }
+}
diff --git a/includes/export/DumpFilter.php b/includes/export/DumpFilter.php
new file mode 100644 (file)
index 0000000..224262d
--- /dev/null
@@ -0,0 +1,134 @@
+<?php
+/**
+ * Dump output filter class.
+ * This just does output filtering and streaming; XML formatting is done
+ * higher up, so be careful in what you do.
+ *
+ * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
+ * https://www.mediawiki.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * @ingroup Dump
+ */
+class DumpFilter {
+       /**
+        * @var DumpOutput
+        * FIXME will need to be made protected whenever legacy code
+        * is updated.
+        */
+       public $sink;
+
+       /**
+        * @var bool
+        */
+       protected $sendingThisPage;
+
+       /**
+        * @param DumpOutput $sink
+        */
+       function __construct( &$sink ) {
+               $this->sink =& $sink;
+       }
+
+       /**
+        * @param string $string
+        */
+       function writeOpenStream( $string ) {
+               $this->sink->writeOpenStream( $string );
+       }
+
+       /**
+        * @param string $string
+        */
+       function writeCloseStream( $string ) {
+               $this->sink->writeCloseStream( $string );
+       }
+
+       /**
+        * @param object $page
+        * @param string $string
+        */
+       function writeOpenPage( $page, $string ) {
+               $this->sendingThisPage = $this->pass( $page, $string );
+               if ( $this->sendingThisPage ) {
+                       $this->sink->writeOpenPage( $page, $string );
+               }
+       }
+
+       /**
+        * @param string $string
+        */
+       function writeClosePage( $string ) {
+               if ( $this->sendingThisPage ) {
+                       $this->sink->writeClosePage( $string );
+                       $this->sendingThisPage = false;
+               }
+       }
+
+       /**
+        * @param object $rev
+        * @param string $string
+        */
+       function writeRevision( $rev, $string ) {
+               if ( $this->sendingThisPage ) {
+                       $this->sink->writeRevision( $rev, $string );
+               }
+       }
+
+       /**
+        * @param object $rev
+        * @param string $string
+        */
+       function writeLogItem( $rev, $string ) {
+               $this->sink->writeRevision( $rev, $string );
+       }
+
+       /**
+        * @param string $newname
+        */
+       function closeRenameAndReopen( $newname ) {
+               $this->sink->closeRenameAndReopen( $newname );
+       }
+
+       /**
+        * @param string $newname
+        * @param bool $open
+        */
+       function closeAndRename( $newname, $open = false ) {
+               $this->sink->closeAndRename( $newname, $open );
+       }
+
+       /**
+        * @return array
+        */
+       function getFilenames() {
+               return $this->sink->getFilenames();
+       }
+
+       /**
+        * Override for page-based filter types.
+        * @param object $page
+        * @return bool
+        */
+       function pass( $page ) {
+               return true;
+       }
+}
diff --git a/includes/export/DumpGZipOutput.php b/includes/export/DumpGZipOutput.php
new file mode 100644 (file)
index 0000000..3f0333e
--- /dev/null
@@ -0,0 +1,36 @@
+<?php
+/**
+ * Sends dump output via the gzip compressor.
+ *
+ * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
+ * https://www.mediawiki.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * @ingroup Dump
+ */
+class DumpGZipOutput extends DumpPipeOutput {
+       /**
+        * @param string $file
+        */
+       function __construct( $file ) {
+               parent::__construct( "gzip", $file );
+       }
+}
diff --git a/includes/export/DumpLatestFilter.php b/includes/export/DumpLatestFilter.php
new file mode 100644 (file)
index 0000000..d21dfa9
--- /dev/null
@@ -0,0 +1,72 @@
+<?php
+/**
+ * Dump output filter to include only the last revision in each page sequence.
+ *
+ * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
+ * https://www.mediawiki.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * @ingroup Dump
+ */
+class DumpLatestFilter extends DumpFilter {
+       public $page;
+
+       public $pageString;
+
+       public $rev;
+
+       public $revString;
+
+       /**
+        * @param object $page
+        * @param string $string
+        */
+       function writeOpenPage( $page, $string ) {
+               $this->page = $page;
+               $this->pageString = $string;
+       }
+
+       /**
+        * @param string $string
+        */
+       function writeClosePage( $string ) {
+               if ( $this->rev ) {
+                       $this->sink->writeOpenPage( $this->page, $this->pageString );
+                       $this->sink->writeRevision( $this->rev, $this->revString );
+                       $this->sink->writeClosePage( $string );
+               }
+               $this->rev = null;
+               $this->revString = null;
+               $this->page = null;
+               $this->pageString = null;
+       }
+
+       /**
+        * @param object $rev
+        * @param string $string
+        */
+       function writeRevision( $rev, $string ) {
+               if ( $rev->rev_id == $this->page->page_latest ) {
+                       $this->rev = $rev;
+                       $this->revString = $string;
+               }
+       }
+}
diff --git a/includes/export/DumpMultiWriter.php b/includes/export/DumpMultiWriter.php
new file mode 100644 (file)
index 0000000..2f5a782
--- /dev/null
@@ -0,0 +1,113 @@
+<?php
+/**
+ * Base class for output stream; prints to stdout or buffer or wherever.
+ *
+ * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
+ * https://www.mediawiki.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * @ingroup Dump
+ */
+class DumpMultiWriter {
+
+       /**
+        * @param array $sinks
+        */
+       function __construct( $sinks ) {
+               $this->sinks = $sinks;
+               $this->count = count( $sinks );
+       }
+
+       /**
+        * @param string $string
+        */
+       function writeOpenStream( $string ) {
+               for ( $i = 0; $i < $this->count; $i++ ) {
+                       $this->sinks[$i]->writeOpenStream( $string );
+               }
+       }
+
+       /**
+        * @param string $string
+        */
+       function writeCloseStream( $string ) {
+               for ( $i = 0; $i < $this->count; $i++ ) {
+                       $this->sinks[$i]->writeCloseStream( $string );
+               }
+       }
+
+       /**
+        * @param object $page
+        * @param string $string
+        */
+       function writeOpenPage( $page, $string ) {
+               for ( $i = 0; $i < $this->count; $i++ ) {
+                       $this->sinks[$i]->writeOpenPage( $page, $string );
+               }
+       }
+
+       /**
+        * @param string $string
+        */
+       function writeClosePage( $string ) {
+               for ( $i = 0; $i < $this->count; $i++ ) {
+                       $this->sinks[$i]->writeClosePage( $string );
+               }
+       }
+
+       /**
+        * @param object $rev
+        * @param string $string
+        */
+       function writeRevision( $rev, $string ) {
+               for ( $i = 0; $i < $this->count; $i++ ) {
+                       $this->sinks[$i]->writeRevision( $rev, $string );
+               }
+       }
+
+       /**
+        * @param array $newnames
+        */
+       function closeRenameAndReopen( $newnames ) {
+               $this->closeAndRename( $newnames, true );
+       }
+
+       /**
+        * @param array $newnames
+        * @param bool $open
+        */
+       function closeAndRename( $newnames, $open = false ) {
+               for ( $i = 0; $i < $this->count; $i++ ) {
+                       $this->sinks[$i]->closeAndRename( $newnames[$i], $open );
+               }
+       }
+
+       /**
+        * @return array
+        */
+       function getFilenames() {
+               $filenames = array();
+               for ( $i = 0; $i < $this->count; $i++ ) {
+                       $filenames[] = $this->sinks[$i]->getFilenames();
+               }
+               return $filenames;
+       }
+}
diff --git a/includes/export/DumpNamespaceFilter.php b/includes/export/DumpNamespaceFilter.php
new file mode 100644 (file)
index 0000000..c7d1b2e
--- /dev/null
@@ -0,0 +1,91 @@
+<?php
+/**
+ * Dump output filter to include or exclude pages in a given set of namespaces.
+ *
+ * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
+ * https://www.mediawiki.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * @ingroup Dump
+ */
+class DumpNamespaceFilter extends DumpFilter {
+       /** @var bool */
+       public $invert = false;
+
+       /** @var array */
+       public $namespaces = array();
+
+       /**
+        * @param DumpOutput $sink
+        * @param array $param
+        * @throws MWException
+        */
+       function __construct( &$sink, $param ) {
+               parent::__construct( $sink );
+
+               $constants = array(
+                       "NS_MAIN"           => NS_MAIN,
+                       "NS_TALK"           => NS_TALK,
+                       "NS_USER"           => NS_USER,
+                       "NS_USER_TALK"      => NS_USER_TALK,
+                       "NS_PROJECT"        => NS_PROJECT,
+                       "NS_PROJECT_TALK"   => NS_PROJECT_TALK,
+                       "NS_FILE"           => NS_FILE,
+                       "NS_FILE_TALK"      => NS_FILE_TALK,
+                       "NS_IMAGE"          => NS_IMAGE, // NS_IMAGE is an alias for NS_FILE
+                       "NS_IMAGE_TALK"     => NS_IMAGE_TALK,
+                       "NS_MEDIAWIKI"      => NS_MEDIAWIKI,
+                       "NS_MEDIAWIKI_TALK" => NS_MEDIAWIKI_TALK,
+                       "NS_TEMPLATE"       => NS_TEMPLATE,
+                       "NS_TEMPLATE_TALK"  => NS_TEMPLATE_TALK,
+                       "NS_HELP"           => NS_HELP,
+                       "NS_HELP_TALK"      => NS_HELP_TALK,
+                       "NS_CATEGORY"       => NS_CATEGORY,
+                       "NS_CATEGORY_TALK"  => NS_CATEGORY_TALK );
+
+               if ( $param { 0 } == '!' ) {
+                       $this->invert = true;
+                       $param = substr( $param, 1 );
+               }
+
+               foreach ( explode( ',', $param ) as $key ) {
+                       $key = trim( $key );
+                       if ( isset( $constants[$key] ) ) {
+                               $ns = $constants[$key];
+                               $this->namespaces[$ns] = true;
+                       } elseif ( is_numeric( $key ) ) {
+                               $ns = intval( $key );
+                               $this->namespaces[$ns] = true;
+                       } else {
+                               throw new MWException( "Unrecognized namespace key '$key'\n" );
+                       }
+               }
+       }
+
+       /**
+        * @param object $page
+        * @return bool
+        */
+       function pass( $page ) {
+               $match = isset( $this->namespaces[$page->page_namespace] );
+               return $this->invert xor $match;
+       }
+}
diff --git a/includes/export/DumpNotalkFilter.php b/includes/export/DumpNotalkFilter.php
new file mode 100644 (file)
index 0000000..9974d67
--- /dev/null
@@ -0,0 +1,37 @@
+<?php
+/**
+ * Simple dump output filter to exclude all talk pages.
+ *
+ * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
+ * https://www.mediawiki.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * @ingroup Dump
+ */
+class DumpNotalkFilter extends DumpFilter {
+       /**
+        * @param object $page
+        * @return bool
+        */
+       function pass( $page ) {
+               return !MWNamespace::isTalk( $page->page_namespace );
+       }
+}
diff --git a/includes/export/DumpOutput.php b/includes/export/DumpOutput.php
new file mode 100644 (file)
index 0000000..bdcaf35
--- /dev/null
@@ -0,0 +1,114 @@
+<?php
+/**
+ * Base class for output stream; prints to stdout or buffer or wherever.
+ *
+ * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
+ * https://www.mediawiki.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * @ingroup Dump
+ */
+class DumpOutput {
+
+       /**
+        * @param string $string
+        */
+       function writeOpenStream( $string ) {
+               $this->write( $string );
+       }
+
+       /**
+        * @param string $string
+        */
+       function writeCloseStream( $string ) {
+               $this->write( $string );
+       }
+
+       /**
+        * @param object $page
+        * @param string $string
+        */
+       function writeOpenPage( $page, $string ) {
+               $this->write( $string );
+       }
+
+       /**
+        * @param string $string
+        */
+       function writeClosePage( $string ) {
+               $this->write( $string );
+       }
+
+       /**
+        * @param object $rev
+        * @param string $string
+        */
+       function writeRevision( $rev, $string ) {
+               $this->write( $string );
+       }
+
+       /**
+        * @param object $rev
+        * @param string $string
+        */
+       function writeLogItem( $rev, $string ) {
+               $this->write( $string );
+       }
+
+       /**
+        * Override to write to a different stream type.
+        * @param string $string
+        * @return bool
+        */
+       function write( $string ) {
+               print $string;
+       }
+
+       /**
+        * Close the old file, move it to a specified name,
+        * and reopen new file with the old name. Use this
+        * for writing out a file in multiple pieces
+        * at specified checkpoints (e.g. every n hours).
+        * @param string|array $newname File name. May be a string or an array with one element
+        */
+       function closeRenameAndReopen( $newname ) {
+       }
+
+       /**
+        * Close the old file, and move it to a specified name.
+        * Use this for the last piece of a file written out
+        * at specified checkpoints (e.g. every n hours).
+        * @param string|array $newname File name. May be a string or an array with one element
+        * @param bool $open If true, a new file with the old filename will be opened
+        *   again for writing (default: false)
+        */
+       function closeAndRename( $newname, $open = false ) {
+       }
+
+       /**
+        * Returns the name of the file or files which are
+        * being written to, if there are any.
+        * @return null
+        */
+       function getFilenames() {
+               return null;
+       }
+}
diff --git a/includes/export/DumpPipeOutput.php b/includes/export/DumpPipeOutput.php
new file mode 100644 (file)
index 0000000..b4ad672
--- /dev/null
@@ -0,0 +1,102 @@
+<?php
+/**
+ * Stream outputter to send data to a file via some filter program.
+ * Even if compression is available in a library, using a separate
+ * program can allow us to make use of a multi-processor system.
+ *
+ * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
+ * https://www.mediawiki.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * @ingroup Dump
+ */
+class DumpPipeOutput extends DumpFileOutput {
+       protected $command, $filename;
+       protected $procOpenResource = false;
+
+       /**
+        * @param string $command
+        * @param string $file
+        */
+       function __construct( $command, $file = null ) {
+               if ( !is_null( $file ) ) {
+                       $command .= " > " . wfEscapeShellArg( $file );
+               }
+
+               $this->startCommand( $command );
+               $this->command = $command;
+               $this->filename = $file;
+       }
+
+       /**
+        * @param string $string
+        */
+       function writeCloseStream( $string ) {
+               parent::writeCloseStream( $string );
+               if ( $this->procOpenResource ) {
+                       proc_close( $this->procOpenResource );
+                       $this->procOpenResource = false;
+               }
+       }
+
+       /**
+        * @param string $command
+        */
+       function startCommand( $command ) {
+               $spec = array(
+                       0 => array( "pipe", "r" ),
+               );
+               $pipes = array();
+               $this->procOpenResource = proc_open( $command, $spec, $pipes );
+               $this->handle = $pipes[0];
+       }
+
+       /**
+        * @param string $newname
+        */
+       function closeRenameAndReopen( $newname ) {
+               $this->closeAndRename( $newname, true );
+       }
+
+       /**
+        * @param string $newname
+        * @param bool $open
+        */
+       function closeAndRename( $newname, $open = false ) {
+               $newname = $this->checkRenameArgCount( $newname );
+               if ( $newname ) {
+                       if ( $this->handle ) {
+                               fclose( $this->handle );
+                               $this->handle = false;
+                       }
+                       if ( $this->procOpenResource ) {
+                               proc_close( $this->procOpenResource );
+                               $this->procOpenResource = false;
+                       }
+                       $this->renameOrException( $newname );
+                       if ( $open ) {
+                               $command = $this->command;
+                               $command .= " > " . wfEscapeShellArg( $this->filename );
+                               $this->startCommand( $command );
+                       }
+               }
+       }
+}
diff --git a/includes/export/WikiExporter.php b/includes/export/WikiExporter.php
new file mode 100644 (file)
index 0000000..a24418c
--- /dev/null
@@ -0,0 +1,469 @@
+<?php
+/**
+ * Base class for exporting
+ *
+ * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
+ * https://www.mediawiki.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * @defgroup Dump Dump
+ */
+
+/**
+ * @ingroup SpecialPage Dump
+ */
+class WikiExporter {
+       /** @var bool Return distinct author list (when not returning full history) */
+       public $list_authors = false;
+
+       /** @var bool */
+       public $dumpUploads = false;
+
+       /** @var bool */
+       public $dumpUploadFileContents = false;
+
+       /** @var string */
+       public $author_list = "";
+
+       const FULL = 1;
+       const CURRENT = 2;
+       const STABLE = 4; // extension defined
+       const LOGS = 8;
+       const RANGE = 16;
+
+       const BUFFER = 0;
+       const STREAM = 1;
+
+       const TEXT = 0;
+       const STUB = 1;
+
+       /** @var int */
+       public $buffer;
+
+       /** @var int */
+       public $text;
+
+       /** @var DumpOutput */
+       public $sink;
+
+       /**
+        * Returns the export schema version.
+        * @return string
+        */
+       public static function schemaVersion() {
+               return "0.10";
+       }
+
+       /**
+        * If using WikiExporter::STREAM to stream a large amount of data,
+        * provide a database connection which is not managed by
+        * LoadBalancer to read from: some history blob types will
+        * make additional queries to pull source data while the
+        * main query is still running.
+        *
+        * @param IDatabase $db
+        * @param int|array $history One of WikiExporter::FULL, WikiExporter::CURRENT,
+        *   WikiExporter::RANGE or WikiExporter::STABLE, or an associative array:
+        *   - offset: non-inclusive offset at which to start the query
+        *   - limit: maximum number of rows to return
+        *   - dir: "asc" or "desc" timestamp order
+        * @param int $buffer One of WikiExporter::BUFFER or WikiExporter::STREAM
+        * @param int $text One of WikiExporter::TEXT or WikiExporter::STUB
+        */
+       function __construct( $db, $history = WikiExporter::CURRENT,
+                       $buffer = WikiExporter::BUFFER, $text = WikiExporter::TEXT ) {
+               $this->db = $db;
+               $this->history = $history;
+               $this->buffer = $buffer;
+               $this->writer = new XmlDumpWriter();
+               $this->sink = new DumpOutput();
+               $this->text = $text;
+       }
+
+       /**
+        * Set the DumpOutput or DumpFilter object which will receive
+        * various row objects and XML output for filtering. Filters
+        * can be chained or used as callbacks.
+        *
+        * @param DumpOutput $sink
+        */
+       public function setOutputSink( &$sink ) {
+               $this->sink =& $sink;
+       }
+
+       public function openStream() {
+               $output = $this->writer->openStream();
+               $this->sink->writeOpenStream( $output );
+       }
+
+       public function closeStream() {
+               $output = $this->writer->closeStream();
+               $this->sink->writeCloseStream( $output );
+       }
+
+       /**
+        * Dumps a series of page and revision records for all pages
+        * in the database, either including complete history or only
+        * the most recent version.
+        */
+       public function allPages() {
+               $this->dumpFrom( '' );
+       }
+
+       /**
+        * Dumps a series of page and revision records for those pages
+        * in the database falling within the page_id range given.
+        * @param int $start Inclusive lower limit (this id is included)
+        * @param int $end Exclusive upper limit (this id is not included)
+        *   If 0, no upper limit.
+        */
+       public function pagesByRange( $start, $end ) {
+               $condition = 'page_id >= ' . intval( $start );
+               if ( $end ) {
+                       $condition .= ' AND page_id < ' . intval( $end );
+               }
+               $this->dumpFrom( $condition );
+       }
+
+       /**
+        * Dumps a series of page and revision records for those pages
+        * in the database with revisions falling within the rev_id range given.
+        * @param int $start Inclusive lower limit (this id is included)
+        * @param int $end Exclusive upper limit (this id is not included)
+        *   If 0, no upper limit.
+        */
+       public function revsByRange( $start, $end ) {
+               $condition = 'rev_id >= ' . intval( $start );
+               if ( $end ) {
+                       $condition .= ' AND rev_id < ' . intval( $end );
+               }
+               $this->dumpFrom( $condition );
+       }
+
+       /**
+        * @param Title $title
+        */
+       public function pageByTitle( $title ) {
+               $this->dumpFrom(
+                       'page_namespace=' . $title->getNamespace() .
+                       ' AND page_title=' . $this->db->addQuotes( $title->getDBkey() ) );
+       }
+
+       /**
+        * @param string $name
+        * @throws MWException
+        */
+       public function pageByName( $name ) {
+               $title = Title::newFromText( $name );
+               if ( is_null( $title ) ) {
+                       throw new MWException( "Can't export invalid title" );
+               } else {
+                       $this->pageByTitle( $title );
+               }
+       }
+
+       /**
+        * @param array $names
+        */
+       public function pagesByName( $names ) {
+               foreach ( $names as $name ) {
+                       $this->pageByName( $name );
+               }
+       }
+
+       public function allLogs() {
+               $this->dumpFrom( '' );
+       }
+
+       /**
+        * @param int $start
+        * @param int $end
+        */
+       public function logsByRange( $start, $end ) {
+               $condition = 'log_id >= ' . intval( $start );
+               if ( $end ) {
+                       $condition .= ' AND log_id < ' . intval( $end );
+               }
+               $this->dumpFrom( $condition );
+       }
+
+       /**
+        * Generates the distinct list of authors of an article
+        * Not called by default (depends on $this->list_authors)
+        * Can be set by Special:Export when not exporting whole history
+        *
+        * @param array $cond
+        */
+       protected function do_list_authors( $cond ) {
+               $this->author_list = "<contributors>";
+               // rev_deleted
+
+               $res = $this->db->select(
+                       array( 'page', 'revision' ),
+                       array( 'DISTINCT rev_user_text', 'rev_user' ),
+                       array(
+                               $this->db->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0',
+                               $cond,
+                               'page_id = rev_id',
+                       ),
+                       __METHOD__
+               );
+
+               foreach ( $res as $row ) {
+                       $this->author_list .= "<contributor>" .
+                               "<username>" .
+                               htmlentities( $row->rev_user_text ) .
+                               "</username>" .
+                               "<id>" .
+                               $row->rev_user .
+                               "</id>" .
+                               "</contributor>";
+               }
+               $this->author_list .= "</contributors>";
+       }
+
+       /**
+        * @param string $cond
+        * @throws MWException
+        * @throws Exception
+        */
+       protected function dumpFrom( $cond = '' ) {
+               # For logging dumps...
+               if ( $this->history & self::LOGS ) {
+                       $where = array( 'user_id = log_user' );
+                       # Hide private logs
+                       $hideLogs = LogEventsList::getExcludeClause( $this->db );
+                       if ( $hideLogs ) {
+                               $where[] = $hideLogs;
+                       }
+                       # Add on any caller specified conditions
+                       if ( $cond ) {
+                               $where[] = $cond;
+                       }
+                       # Get logging table name for logging.* clause
+                       $logging = $this->db->tableName( 'logging' );
+
+                       if ( $this->buffer == WikiExporter::STREAM ) {
+                               $prev = $this->db->bufferResults( false );
+                       }
+                       $result = null; // Assuring $result is not undefined, if exception occurs early
+                       try {
+                               $result = $this->db->select( array( 'logging', 'user' ),
+                                       array( "{$logging}.*", 'user_name' ), // grab the user name
+                                       $where,
+                                       __METHOD__,
+                                       array( 'ORDER BY' => 'log_id', 'USE INDEX' => array( 'logging' => 'PRIMARY' ) )
+                               );
+                               $this->outputLogStream( $result );
+                               if ( $this->buffer == WikiExporter::STREAM ) {
+                                       $this->db->bufferResults( $prev );
+                               }
+                       } catch ( Exception $e ) {
+                               // Throwing the exception does not reliably free the resultset, and
+                               // would also leave the connection in unbuffered mode.
+
+                               // Freeing result
+                               try {
+                                       if ( $result ) {
+                                               $result->free();
+                                       }
+                               } catch ( Exception $e2 ) {
+                                       // Already in panic mode -> ignoring $e2 as $e has
+                                       // higher priority
+                               }
+
+                               // Putting database back in previous buffer mode
+                               try {
+                                       if ( $this->buffer == WikiExporter::STREAM ) {
+                                               $this->db->bufferResults( $prev );
+                                       }
+                               } catch ( Exception $e2 ) {
+                                       // Already in panic mode -> ignoring $e2 as $e has
+                                       // higher priority
+                               }
+
+                               // Inform caller about problem
+                               throw $e;
+                       }
+               # For page dumps...
+               } else {
+                       $tables = array( 'page', 'revision' );
+                       $opts = array( 'ORDER BY' => 'page_id ASC' );
+                       $opts['USE INDEX'] = array();
+                       $join = array();
+                       if ( is_array( $this->history ) ) {
+                               # Time offset/limit for all pages/history...
+                               $revJoin = 'page_id=rev_page';
+                               # Set time order
+                               if ( $this->history['dir'] == 'asc' ) {
+                                       $op = '>';
+                                       $opts['ORDER BY'] = 'rev_timestamp ASC';
+                               } else {
+                                       $op = '<';
+                                       $opts['ORDER BY'] = 'rev_timestamp DESC';
+                               }
+                               # Set offset
+                               if ( !empty( $this->history['offset'] ) ) {
+                                       $revJoin .= " AND rev_timestamp $op " .
+                                               $this->db->addQuotes( $this->db->timestamp( $this->history['offset'] ) );
+                               }
+                               $join['revision'] = array( 'INNER JOIN', $revJoin );
+                               # Set query limit
+                               if ( !empty( $this->history['limit'] ) ) {
+                                       $opts['LIMIT'] = intval( $this->history['limit'] );
+                               }
+                       } elseif ( $this->history & WikiExporter::FULL ) {
+                               # Full history dumps...
+                               $join['revision'] = array( 'INNER JOIN', 'page_id=rev_page' );
+                       } elseif ( $this->history & WikiExporter::CURRENT ) {
+                               # Latest revision dumps...
+                               if ( $this->list_authors && $cond != '' ) { // List authors, if so desired
+                                       $this->do_list_authors( $cond );
+                               }
+                               $join['revision'] = array( 'INNER JOIN', 'page_id=rev_page AND page_latest=rev_id' );
+                       } elseif ( $this->history & WikiExporter::STABLE ) {
+                               # "Stable" revision dumps...
+                               # Default JOIN, to be overridden...
+                               $join['revision'] = array( 'INNER JOIN', 'page_id=rev_page AND page_latest=rev_id' );
+                               # One, and only one hook should set this, and return false
+                               if ( Hooks::run( 'WikiExporter::dumpStableQuery', array( &$tables, &$opts, &$join ) ) ) {
+                                       throw new MWException( __METHOD__ . " given invalid history dump type." );
+                               }
+                       } elseif ( $this->history & WikiExporter::RANGE ) {
+                               # Dump of revisions within a specified range
+                               $join['revision'] = array( 'INNER JOIN', 'page_id=rev_page' );
+                               $opts['ORDER BY'] = array( 'rev_page ASC', 'rev_id ASC' );
+                       } else {
+                               # Unknown history specification parameter?
+                               throw new MWException( __METHOD__ . " given invalid history dump type." );
+                       }
+                       # Query optimization hacks
+                       if ( $cond == '' ) {
+                               $opts[] = 'STRAIGHT_JOIN';
+                               $opts['USE INDEX']['page'] = 'PRIMARY';
+                       }
+                       # Build text join options
+                       if ( $this->text != WikiExporter::STUB ) { // 1-pass
+                               $tables[] = 'text';
+                               $join['text'] = array( 'INNER JOIN', 'rev_text_id=old_id' );
+                       }
+
+                       if ( $this->buffer == WikiExporter::STREAM ) {
+                               $prev = $this->db->bufferResults( false );
+                       }
+
+                       $result = null; // Assuring $result is not undefined, if exception occurs early
+                       try {
+                               Hooks::run( 'ModifyExportQuery',
+                                               array( $this->db, &$tables, &$cond, &$opts, &$join ) );
+
+                               # Do the query!
+                               $result = $this->db->select( $tables, '*', $cond, __METHOD__, $opts, $join );
+                               # Output dump results
+                               $this->outputPageStream( $result );
+
+                               if ( $this->buffer == WikiExporter::STREAM ) {
+                                       $this->db->bufferResults( $prev );
+                               }
+                       } catch ( Exception $e ) {
+                               // Throwing the exception does not reliably free the resultset, and
+                               // would also leave the connection in unbuffered mode.
+
+                               // Freeing result
+                               try {
+                                       if ( $result ) {
+                                               $result->free();
+                                       }
+                               } catch ( Exception $e2 ) {
+                                       // Already in panic mode -> ignoring $e2 as $e has
+                                       // higher priority
+                               }
+
+                               // Putting database back in previous buffer mode
+                               try {
+                                       if ( $this->buffer == WikiExporter::STREAM ) {
+                                               $this->db->bufferResults( $prev );
+                                       }
+                               } catch ( Exception $e2 ) {
+                                       // Already in panic mode -> ignoring $e2 as $e has
+                                       // higher priority
+                               }
+
+                               // Inform caller about problem
+                               throw $e;
+                       }
+               }
+       }
+
+       /**
+        * Runs through a query result set dumping page and revision records.
+        * The result set should be sorted/grouped by page to avoid duplicate
+        * page records in the output.
+        *
+        * Should be safe for
+        * streaming (non-buffered) queries, as long as it was made on a
+        * separate database connection not managed by LoadBalancer; some
+        * blob storage types will make queries to pull source data.
+        *
+        * @param ResultWrapper $resultset
+        */
+       protected function outputPageStream( $resultset ) {
+               $last = null;
+               foreach ( $resultset as $row ) {
+                       if ( $last === null ||
+                               $last->page_namespace != $row->page_namespace ||
+                               $last->page_title != $row->page_title ) {
+                               if ( $last !== null ) {
+                                       $output = '';
+                                       if ( $this->dumpUploads ) {
+                                               $output .= $this->writer->writeUploads( $last, $this->dumpUploadFileContents );
+                                       }
+                                       $output .= $this->writer->closePage();
+                                       $this->sink->writeClosePage( $output );
+                               }
+                               $output = $this->writer->openPage( $row );
+                               $this->sink->writeOpenPage( $row, $output );
+                               $last = $row;
+                       }
+                       $output = $this->writer->writeRevision( $row );
+                       $this->sink->writeRevision( $row, $output );
+               }
+               if ( $last !== null ) {
+                       $output = '';
+                       if ( $this->dumpUploads ) {
+                               $output .= $this->writer->writeUploads( $last, $this->dumpUploadFileContents );
+                       }
+                       $output .= $this->author_list;
+                       $output .= $this->writer->closePage();
+                       $this->sink->writeClosePage( $output );
+               }
+       }
+
+       /**
+        * @param ResultWrapper $resultset
+        */
+       protected function outputLogStream( $resultset ) {
+               foreach ( $resultset as $row ) {
+                       $output = $this->writer->writeLogItem( $row );
+                       $this->sink->writeLogItem( $row, $output );
+               }
+       }
+}
diff --git a/includes/export/XmlDumpWriter.php b/includes/export/XmlDumpWriter.php
new file mode 100644 (file)
index 0000000..3bd4c96
--- /dev/null
@@ -0,0 +1,440 @@
+<?php
+/**
+ * XmlDumpWriter
+ *
+ * Copyright © 2003, 2005, 2006 Brion Vibber <brion@pobox.com>
+ * https://www.mediawiki.org/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+/**
+ * @ingroup Dump
+ */
+class XmlDumpWriter {
+       /**
+        * Opens the XML output stream's root "<mediawiki>" element.
+        * This does not include an xml directive, so is safe to include
+        * as a subelement in a larger XML stream. Namespace and XML Schema
+        * references are included.
+        *
+        * Output will be encoded in UTF-8.
+        *
+        * @return string
+        */
+       function openStream() {
+               global $wgLanguageCode;
+               $ver = WikiExporter::schemaVersion();
+               return Xml::element( 'mediawiki', array(
+                       'xmlns'              => "http://www.mediawiki.org/xml/export-$ver/",
+                       'xmlns:xsi'          => "http://www.w3.org/2001/XMLSchema-instance",
+                       /*
+                        * When a new version of the schema is created, it needs staging on mediawiki.org.
+                        * This requires a change in the operations/mediawiki-config git repo.
+                        *
+                        * Create a changeset like https://gerrit.wikimedia.org/r/#/c/149643/ in which
+                        * you copy in the new xsd file.
+                        *
+                        * After it is reviewed, merged and deployed (sync-docroot), the index.html needs purging.
+                        * echo "http://www.mediawiki.org/xml/index.html" | mwscript purgeList.php --wiki=aawiki
+                        */
+                       'xsi:schemaLocation' => "http://www.mediawiki.org/xml/export-$ver/ " .
+                               "http://www.mediawiki.org/xml/export-$ver.xsd",
+                       'version'            => $ver,
+                       'xml:lang'           => $wgLanguageCode ),
+                       null ) .
+                       "\n" .
+                       $this->siteInfo();
+       }
+
+       /**
+        * @return string
+        */
+       function siteInfo() {
+               $info = array(
+                       $this->sitename(),
+                       $this->dbname(),
+                       $this->homelink(),
+                       $this->generator(),
+                       $this->caseSetting(),
+                       $this->namespaces() );
+               return "  <siteinfo>\n    " .
+                       implode( "\n    ", $info ) .
+                       "\n  </siteinfo>\n";
+       }
+
+       /**
+        * @return string
+        */
+       function sitename() {
+               global $wgSitename;
+               return Xml::element( 'sitename', array(), $wgSitename );
+       }
+
+       /**
+        * @return string
+        */
+       function dbname() {
+               global $wgDBname;
+               return Xml::element( 'dbname', array(), $wgDBname );
+       }
+
+       /**
+        * @return string
+        */
+       function generator() {
+               global $wgVersion;
+               return Xml::element( 'generator', array(), "MediaWiki $wgVersion" );
+       }
+
+       /**
+        * @return string
+        */
+       function homelink() {
+               return Xml::element( 'base', array(), Title::newMainPage()->getCanonicalURL() );
+       }
+
+       /**
+        * @return string
+        */
+       function caseSetting() {
+               global $wgCapitalLinks;
+               // "case-insensitive" option is reserved for future
+               $sensitivity = $wgCapitalLinks ? 'first-letter' : 'case-sensitive';
+               return Xml::element( 'case', array(), $sensitivity );
+       }
+
+       /**
+        * @return string
+        */
+       function namespaces() {
+               global $wgContLang;
+               $spaces = "<namespaces>\n";
+               foreach ( $wgContLang->getFormattedNamespaces() as $ns => $title ) {
+                       $spaces .= '      ' .
+                               Xml::element( 'namespace',
+                                       array(
+                                               'key' => $ns,
+                                               'case' => MWNamespace::isCapitalized( $ns ) ? 'first-letter' : 'case-sensitive',
+                                       ), $title ) . "\n";
+               }
+               $spaces .= "    </namespaces>";
+               return $spaces;
+       }
+
+       /**
+        * Closes the output stream with the closing root element.
+        * Call when finished dumping things.
+        *
+        * @return string
+        */
+       function closeStream() {
+               return "</mediawiki>\n";
+       }
+
+       /**
+        * Opens a "<page>" section on the output stream, with data
+        * from the given database row.
+        *
+        * @param object $row
+        * @return string
+        */
+       public function openPage( $row ) {
+               $out = "  <page>\n";
+               $title = Title::makeTitle( $row->page_namespace, $row->page_title );
+               $out .= '    ' . Xml::elementClean( 'title', array(), self::canonicalTitle( $title ) ) . "\n";
+               $out .= '    ' . Xml::element( 'ns', array(), strval( $row->page_namespace ) ) . "\n";
+               $out .= '    ' . Xml::element( 'id', array(), strval( $row->page_id ) ) . "\n";
+               if ( $row->page_is_redirect ) {
+                       $page = WikiPage::factory( $title );
+                       $redirect = $page->getRedirectTarget();
+                       if ( $redirect instanceof Title && $redirect->isValidRedirectTarget() ) {
+                               $out .= '    ';
+                               $out .= Xml::element( 'redirect', array( 'title' => self::canonicalTitle( $redirect ) ) );
+                               $out .= "\n";
+                       }
+               }
+
+               if ( $row->page_restrictions != '' ) {
+                       $out .= '    ' . Xml::element( 'restrictions', array(),
+                               strval( $row->page_restrictions ) ) . "\n";
+               }
+
+               Hooks::run( 'XmlDumpWriterOpenPage', array( $this, &$out, $row, $title ) );
+
+               return $out;
+       }
+
+       /**
+        * Closes a "<page>" section on the output stream.
+        *
+        * @access private
+        * @return string
+        */
+       function closePage() {
+               return "  </page>\n";
+       }
+
+       /**
+        * Dumps a "<revision>" section on the output stream, with
+        * data filled in from the given database row.
+        *
+        * @param object $row
+        * @return string
+        * @access private
+        */
+       function writeRevision( $row ) {
+
+               $out = "    <revision>\n";
+               $out .= "      " . Xml::element( 'id', null, strval( $row->rev_id ) ) . "\n";
+               if ( isset( $row->rev_parent_id ) && $row->rev_parent_id ) {
+                       $out .= "      " . Xml::element( 'parentid', null, strval( $row->rev_parent_id ) ) . "\n";
+               }
+
+               $out .= $this->writeTimestamp( $row->rev_timestamp );
+
+               if ( isset( $row->rev_deleted ) && ( $row->rev_deleted & Revision::DELETED_USER ) ) {
+                       $out .= "      " . Xml::element( 'contributor', array( 'deleted' => 'deleted' ) ) . "\n";
+               } else {
+                       $out .= $this->writeContributor( $row->rev_user, $row->rev_user_text );
+               }
+
+               if ( isset( $row->rev_minor_edit ) && $row->rev_minor_edit ) {
+                       $out .= "      <minor/>\n";
+               }
+               if ( isset( $row->rev_deleted ) && ( $row->rev_deleted & Revision::DELETED_COMMENT ) ) {
+                       $out .= "      " . Xml::element( 'comment', array( 'deleted' => 'deleted' ) ) . "\n";
+               } elseif ( $row->rev_comment != '' ) {
+                       $out .= "      " . Xml::elementClean( 'comment', array(), strval( $row->rev_comment ) ) . "\n";
+               }
+
+               if ( isset( $row->rev_content_model ) && !is_null( $row->rev_content_model ) ) {
+                       $content_model = strval( $row->rev_content_model );
+               } else {
+                       // probably using $wgContentHandlerUseDB = false;
+                       $title = Title::makeTitle( $row->page_namespace, $row->page_title );
+                       $content_model = ContentHandler::getDefaultModelFor( $title );
+               }
+
+               $content_handler = ContentHandler::getForModelID( $content_model );
+
+               if ( isset( $row->rev_content_format ) && !is_null( $row->rev_content_format ) ) {
+                       $content_format = strval( $row->rev_content_format );
+               } else {
+                       // probably using $wgContentHandlerUseDB = false;
+                       $content_format = $content_handler->getDefaultFormat();
+               }
+
+               $out .= "      " . Xml::element( 'model', null, strval( $content_model ) ) . "\n";
+               $out .= "      " . Xml::element( 'format', null, strval( $content_format ) ) . "\n";
+
+               $text = '';
+               if ( isset( $row->rev_deleted ) && ( $row->rev_deleted & Revision::DELETED_TEXT ) ) {
+                       $out .= "      " . Xml::element( 'text', array( 'deleted' => 'deleted' ) ) . "\n";
+               } elseif ( isset( $row->old_text ) ) {
+                       // Raw text from the database may have invalid chars
+                       $text = strval( Revision::getRevisionText( $row ) );
+                       $text = $content_handler->exportTransform( $text, $content_format );
+                       $out .= "      " . Xml::elementClean( 'text',
+                               array( 'xml:space' => 'preserve', 'bytes' => intval( $row->rev_len ) ),
+                               strval( $text ) ) . "\n";
+               } else {
+                       // Stub output
+                       $out .= "      " . Xml::element( 'text',
+                               array( 'id' => $row->rev_text_id, 'bytes' => intval( $row->rev_len ) ),
+                               "" ) . "\n";
+               }
+
+               if ( isset( $row->rev_sha1 )
+                       && $row->rev_sha1
+                       && !( $row->rev_deleted & Revision::DELETED_TEXT )
+               ) {
+                       $out .= "      " . Xml::element( 'sha1', null, strval( $row->rev_sha1 ) ) . "\n";
+               } else {
+                       $out .= "      <sha1/>\n";
+               }
+
+               Hooks::run( 'XmlDumpWriterWriteRevision', array( &$this, &$out, $row, $text ) );
+
+               $out .= "    </revision>\n";
+
+               return $out;
+       }
+
+       /**
+        * Dumps a "<logitem>" section on the output stream, with
+        * data filled in from the given database row.
+        *
+        * @param object $row
+        * @return string
+        * @access private
+        */
+       function writeLogItem( $row ) {
+
+               $out = "  <logitem>\n";
+               $out .= "    " . Xml::element( 'id', null, strval( $row->log_id ) ) . "\n";
+
+               $out .= $this->writeTimestamp( $row->log_timestamp, "    " );
+
+               if ( $row->log_deleted & LogPage::DELETED_USER ) {
+                       $out .= "    " . Xml::element( 'contributor', array( 'deleted' => 'deleted' ) ) . "\n";
+               } else {
+                       $out .= $this->writeContributor( $row->log_user, $row->user_name, "    " );
+               }
+
+               if ( $row->log_deleted & LogPage::DELETED_COMMENT ) {
+                       $out .= "    " . Xml::element( 'comment', array( 'deleted' => 'deleted' ) ) . "\n";
+               } elseif ( $row->log_comment != '' ) {
+                       $out .= "    " . Xml::elementClean( 'comment', null, strval( $row->log_comment ) ) . "\n";
+               }
+
+               $out .= "    " . Xml::element( 'type', null, strval( $row->log_type ) ) . "\n";
+               $out .= "    " . Xml::element( 'action', null, strval( $row->log_action ) ) . "\n";
+
+               if ( $row->log_deleted & LogPage::DELETED_ACTION ) {
+                       $out .= "    " . Xml::element( 'text', array( 'deleted' => 'deleted' ) ) . "\n";
+               } else {
+                       $title = Title::makeTitle( $row->log_namespace, $row->log_title );
+                       $out .= "    " . Xml::elementClean( 'logtitle', null, self::canonicalTitle( $title ) ) . "\n";
+                       $out .= "    " . Xml::elementClean( 'params',
+                               array( 'xml:space' => 'preserve' ),
+                               strval( $row->log_params ) ) . "\n";
+               }
+
+               $out .= "  </logitem>\n";
+
+               return $out;
+       }
+
+       /**
+        * @param string $timestamp
+        * @param string $indent Default to six spaces
+        * @return string
+        */
+       function writeTimestamp( $timestamp, $indent = "      " ) {
+               $ts = wfTimestamp( TS_ISO_8601, $timestamp );
+               return $indent . Xml::element( 'timestamp', null, $ts ) . "\n";
+       }
+
+       /**
+        * @param int $id
+        * @param string $text
+        * @param string $indent Default to six spaces
+        * @return string
+        */
+       function writeContributor( $id, $text, $indent = "      " ) {
+               $out = $indent . "<contributor>\n";
+               if ( $id || !IP::isValid( $text ) ) {
+                       $out .= $indent . "  " . Xml::elementClean( 'username', null, strval( $text ) ) . "\n";
+                       $out .= $indent . "  " . Xml::element( 'id', null, strval( $id ) ) . "\n";
+               } else {
+                       $out .= $indent . "  " . Xml::elementClean( 'ip', null, strval( $text ) ) . "\n";
+               }
+               $out .= $indent . "</contributor>\n";
+               return $out;
+       }
+
+       /**
+        * Warning! This data is potentially inconsistent. :(
+        * @param object $row
+        * @param bool $dumpContents
+        * @return string
+        */
+       function writeUploads( $row, $dumpContents = false ) {
+               if ( $row->page_namespace == NS_FILE ) {
+                       $img = wfLocalFile( $row->page_title );
+                       if ( $img && $img->exists() ) {
+                               $out = '';
+                               foreach ( array_reverse( $img->getHistory() ) as $ver ) {
+                                       $out .= $this->writeUpload( $ver, $dumpContents );
+                               }
+                               $out .= $this->writeUpload( $img, $dumpContents );
+                               return $out;
+                       }
+               }
+               return '';
+       }
+
+       /**
+        * @param File $file
+        * @param bool $dumpContents
+        * @return string
+        */
+       function writeUpload( $file, $dumpContents = false ) {
+               if ( $file->isOld() ) {
+                       $archiveName = "      " .
+                               Xml::element( 'archivename', null, $file->getArchiveName() ) . "\n";
+               } else {
+                       $archiveName = '';
+               }
+               if ( $dumpContents ) {
+                       $be = $file->getRepo()->getBackend();
+                       # Dump file as base64
+                       # Uses only XML-safe characters, so does not need escaping
+                       # @todo Too bad this loads the contents into memory (script might swap)
+                       $contents = '      <contents encoding="base64">' .
+                               chunk_split( base64_encode(
+                                       $be->getFileContents( array( 'src' => $file->getPath() ) ) ) ) .
+                               "      </contents>\n";
+               } else {
+                       $contents = '';
+               }
+               if ( $file->isDeleted( File::DELETED_COMMENT ) ) {
+                       $comment = Xml::element( 'comment', array( 'deleted' => 'deleted' ) );
+               } else {
+                       $comment = Xml::elementClean( 'comment', null, $file->getDescription() );
+               }
+               return "    <upload>\n" .
+                       $this->writeTimestamp( $file->getTimestamp() ) .
+                       $this->writeContributor( $file->getUser( 'id' ), $file->getUser( 'text' ) ) .
+                       "      " . $comment . "\n" .
+                       "      " . Xml::element( 'filename', null, $file->getName() ) . "\n" .
+                       $archiveName .
+                       "      " . Xml::element( 'src', null, $file->getCanonicalURL() ) . "\n" .
+                       "      " . Xml::element( 'size', null, $file->getSize() ) . "\n" .
+                       "      " . Xml::element( 'sha1base36', null, $file->getSha1() ) . "\n" .
+                       "      " . Xml::element( 'rel', null, $file->getRel() ) . "\n" .
+                       $contents .
+                       "    </upload>\n";
+       }
+
+       /**
+        * Return prefixed text form of title, but using the content language's
+        * canonical namespace. This skips any special-casing such as gendered
+        * user namespaces -- which while useful, are not yet listed in the
+        * XML "<siteinfo>" data so are unsafe in export.
+        *
+        * @param Title $title
+        * @return string
+        * @since 1.18
+        */
+       public static function canonicalTitle( Title $title ) {
+               if ( $title->isExternal() ) {
+                       return $title->getPrefixedText();
+               }
+
+               global $wgContLang;
+               $prefix = $wgContLang->getFormattedNsText( $title->getNamespace() );
+
+               if ( $prefix !== '' ) {
+                       $prefix .= ':';
+               }
+
+               return $prefix . $title->getText();
+       }
+}