$originalDir = getcwd();
require_once( dirname( __FILE__ ) . '/commandLine.inc' );
-require_once( 'backup.inc' );
-
-/**
- * @ingroup Maintenance
- */
-class TextPassDumper extends BackupDumper {
- var $prefetch = null;
- var $input = "php://stdin";
- var $history = WikiExporter::FULL;
- var $fetchCount = 0;
- var $prefetchCount = 0;
-
- var $failures = 0;
- var $maxFailures = 5;
- var $failedTextRetrievals = 0;
- var $maxConsecutiveFailedTextRetrievals = 200;
- var $failureTimeout = 5; // Seconds to sleep after db failure
-
- var $php = "php";
- var $spawn = false;
- var $spawnProc = false;
- var $spawnWrite = false;
- var $spawnRead = false;
- var $spawnErr = false;
-
- function dump( $history, $text = WikiExporter::TEXT ) {
- # This shouldn't happen if on console... ;)
- header( 'Content-type: text/html; charset=UTF-8' );
-
- # Notice messages will foul up your XML output even if they're
- # relatively harmless.
- if ( ini_get( 'display_errors' ) )
- ini_set( 'display_errors', 'stderr' );
-
- $this->initProgress( $this->history );
-
- $this->db = $this->backupDb();
-
- $this->egress = new ExportProgressFilter( $this->sink, $this );
-
- $input = fopen( $this->input, "rt" );
- $result = $this->readDump( $input );
-
- if ( WikiError::isError( $result ) ) {
- wfDie( $result->getMessage() );
- }
-
- if ( $this->spawnProc ) {
- $this->closeSpawn();
- }
-
- $this->report( true );
- }
-
- function processOption( $opt, $val, $param ) {
- global $IP;
- $url = $this->processFileOpt( $val, $param );
-
- switch( $opt ) {
- case 'prefetch':
- require_once "$IP/maintenance/backupPrefetch.inc";
- $this->prefetch = new BaseDump( $url );
- break;
- case 'stub':
- $this->input = $url;
- break;
- case 'current':
- $this->history = WikiExporter::CURRENT;
- break;
- case 'full':
- $this->history = WikiExporter::FULL;
- break;
- case 'spawn':
- $this->spawn = true;
- if ( $val ) {
- $this->php = $val;
- }
- break;
- }
- }
-
- function processFileOpt( $val, $param ) {
- switch( $val ) {
- case "file":
- return $param;
- case "gzip":
- return "compress.zlib://$param";
- case "bzip2":
- return "compress.bzip2://$param";
- case "7zip":
- return "mediawiki.compress.7z://$param";
- default:
- return $val;
- }
- }
-
- /**
- * Overridden to include prefetch ratio if enabled.
- */
- function showReport() {
- if ( !$this->prefetch ) {
- return parent::showReport();
- }
-
- if ( $this->reporting ) {
- $delta = wfTime() - $this->startTime;
- $now = wfTimestamp( TS_DB );
- if ( $delta ) {
- $rate = $this->pageCount / $delta;
- $revrate = $this->revCount / $delta;
- $portion = $this->revCount / $this->maxCount;
- $eta = $this->startTime + $delta / $portion;
- $etats = wfTimestamp( TS_DB, intval( $eta ) );
- $fetchrate = 100.0 * $this->prefetchCount / $this->fetchCount;
- } else {
- $rate = '-';
- $revrate = '-';
- $etats = '-';
- $fetchrate = '-';
- }
- $this->progress( sprintf( "%s: %s %d pages (%0.3f/sec), %d revs (%0.3f/sec), %0.1f%% prefetched, ETA %s [max %d]",
- $now, wfWikiID(), $this->pageCount, $rate, $this->revCount, $revrate, $fetchrate, $etats, $this->maxCount ) );
- }
- }
-
- function readDump( $input ) {
- $this->buffer = "";
- $this->openElement = false;
- $this->atStart = true;
- $this->state = "";
- $this->lastName = "";
- $this->thisPage = 0;
- $this->thisRev = 0;
-
- $parser = xml_parser_create( "UTF-8" );
- xml_parser_set_option( $parser, XML_OPTION_CASE_FOLDING, false );
-
- xml_set_element_handler( $parser, array( &$this, 'startElement' ), array( &$this, 'endElement' ) );
- xml_set_character_data_handler( $parser, array( &$this, 'characterData' ) );
-
- $offset = 0; // for context extraction on error reporting
- $bufferSize = 512 * 1024;
- do {
- $chunk = fread( $input, $bufferSize );
- if ( !xml_parse( $parser, $chunk, feof( $input ) ) ) {
- wfDebug( "TextDumpPass::readDump encountered XML parsing error\n" );
- return new WikiXmlError( $parser, 'XML import parse failure', $chunk, $offset );
- }
- $offset += strlen( $chunk );
- } while ( $chunk !== false && !feof( $input ) );
- xml_parser_free( $parser );
-
- return true;
- }
-
- function getText( $id ) {
- $this->fetchCount++;
- if ( isset( $this->prefetch ) ) {
- $text = $this->prefetch->prefetch( $this->thisPage, $this->thisRev );
- if ( $text === null ) {
- // Entry missing from prefetch dump
- } elseif ( $text === "" ) {
- // Blank entries may indicate that the prior dump was broken.
- // To be safe, reload it.
- } else {
- $dbr = wfGetDB( DB_SLAVE );
- $revID = intval($this->thisRev);
- $revLength = $dbr->selectField( 'revision', 'rev_len', array('rev_id' => $revID ) );
- // if length of rev text in file doesn't match length in db, we reload
- // this avoids carrying forward broken data from previous xml dumps
- if( strlen($text) == $revLength ) {
- $this->prefetchCount++;
- return $text;
- }
- }
- }
- return $this->doGetText( $id );
- }
-
- private function doGetText( $id ) {
-
- $id = intval( $id );
- $this->failures = 0;
- $ex = new MWException( "Graceful storage failure" );
- while (true) {
- if ( $this->spawn ) {
- if ($this->failures) {
- // we don't know why it failed, could be the child process
- // borked, could be db entry busted, could be db server out to lunch,
- // so cover all bases
- $this->closeSpawn();
- $this->openSpawn();
- }
- $text = $this->getTextSpawned( $id );
- } else {
- $text = $this->getTextDbSafe( $id );
- }
- if ( $text === false ) {
- $this->failures++;
- if ( $this->failures > $this->maxFailures) {
- $this->progress( "Failed to retrieve revision text for text id ".
- "$id after $this->maxFailures tries, giving up" );
- // were there so many bad retrievals in a row we want to bail?
- // at some point we have to declare the dump irretrievably broken
- $this->failedTextRetrievals++;
- if ($this->failedTextRetrievals > $this->maxConsecutiveFailedTextRetrievals) {
- throw $ex;
- }
- else {
- // would be nice to return something better to the caller someday,
- // log what we know about the failure and about the revision
- return("");
- }
- } else {
- $this->progress( "Error $this->failures " .
- "of allowed $this->maxFailures retrieving revision text for text id $id! " .
- "Pausing $this->failureTimeout seconds before retry..." );
- sleep( $this->failureTimeout );
- }
- } else {
- $this->failedTextRetrievals= 0;
- return( $text );
- }
- }
-
- }
-
- /**
- * Fetch a text revision from the database, retrying in case of failure.
- * This may survive some transitory errors by reconnecting, but
- * may not survive a long-term server outage.
- */
- private function getTextDbSafe( $id ) {
- while ( true ) {
- try {
- $text = $this->getTextDb( $id );
- } catch ( DBQueryError $ex ) {
- $text = false;
- }
- return $text;
- }
- }
-
- /**
- * May throw a database error if, say, the server dies during query.
- */
- private function getTextDb( $id ) {
- global $wgContLang;
- $row = $this->db->selectRow( 'text',
- array( 'old_text', 'old_flags' ),
- array( 'old_id' => $id ),
- __METHOD__ );
- $text = Revision::getRevisionText( $row );
- if ( $text === false ) {
- return false;
- }
- $stripped = str_replace( "\r", "", $text );
- $normalized = $wgContLang->normalize( $stripped );
- return $normalized;
- }
-
- private function getTextSpawned( $id ) {
- wfSuppressWarnings();
- if ( !$this->spawnProc ) {
- // First time?
- $this->openSpawn();
- }
- $text = $this->getTextSpawnedOnce( $id );
- wfRestoreWarnings();
- return $text;
- }
-
- function openSpawn() {
- global $IP, $wgDBname;
-
- $cmd = implode( " ",
- array_map( 'wfEscapeShellArg',
- array(
- $this->php,
- "$IP/maintenance/fetchText.php",
- $wgDBname ) ) );
- $spec = array(
- 0 => array( "pipe", "r" ),
- 1 => array( "pipe", "w" ),
- 2 => array( "file", "/dev/null", "a" ) );
- $pipes = array();
-
- $this->progress( "Spawning database subprocess: $cmd" );
- $this->spawnProc = proc_open( $cmd, $spec, $pipes );
- if ( !$this->spawnProc ) {
- // shit
- $this->progress( "Subprocess spawn failed." );
- return false;
- }
- list(
- $this->spawnWrite, // -> stdin
- $this->spawnRead, // <- stdout
- ) = $pipes;
-
- return true;
- }
-
- private function closeSpawn() {
- wfSuppressWarnings();
- if ( $this->spawnRead )
- fclose( $this->spawnRead );
- $this->spawnRead = false;
- if ( $this->spawnWrite )
- fclose( $this->spawnWrite );
- $this->spawnWrite = false;
- if ( $this->spawnErr )
- fclose( $this->spawnErr );
- $this->spawnErr = false;
- if ( $this->spawnProc )
- pclose( $this->spawnProc );
- $this->spawnProc = false;
- wfRestoreWarnings();
- }
-
- private function getTextSpawnedOnce( $id ) {
- global $wgContLang;
-
- $ok = fwrite( $this->spawnWrite, "$id\n" );
- // $this->progress( ">> $id" );
- if ( !$ok ) return false;
-
- $ok = fflush( $this->spawnWrite );
- // $this->progress( ">> [flush]" );
- if ( !$ok ) return false;
-
- // check that the text id they are sending is the one we asked for
- // this avoids out of sync revision text errors we have encountered in the past
- $newId = fgets( $this->spawnRead );
- if ( $newId === false ) {
- return false;
- }
- if ( $id != intval( $newId ) ) {
- return false;
- }
-
- $len = fgets( $this->spawnRead );
- // $this->progress( "<< " . trim( $len ) );
- if ( $len === false ) return false;
-
- $nbytes = intval( $len );
- // actual error, not zero-length text
- if ($nbytes < 0 ) return false;
-
- $text = "";
-
- // Subprocess may not send everything at once, we have to loop.
- while ( $nbytes > strlen( $text ) ) {
- $buffer = fread( $this->spawnRead, $nbytes - strlen( $text ) );
- if ( $buffer === false ) break;
- $text .= $buffer;
- }
-
- $gotbytes = strlen( $text );
- if ( $gotbytes != $nbytes ) {
- $this->progress( "Expected $nbytes bytes from database subprocess, got $gotbytes " );
- return false;
- }
-
- // Do normalization in the dump thread...
- $stripped = str_replace( "\r", "", $text );
- $normalized = $wgContLang->normalize( $stripped );
- return $normalized;
- }
-
- function startElement( $parser, $name, $attribs ) {
- $this->clearOpenElement( null );
- $this->lastName = $name;
-
- if ( $name == 'revision' ) {
- $this->state = $name;
- $this->egress->writeOpenPage( null, $this->buffer );
- $this->buffer = "";
- } elseif ( $name == 'page' ) {
- $this->state = $name;
- if ( $this->atStart ) {
- $this->egress->writeOpenStream( $this->buffer );
- $this->buffer = "";
- $this->atStart = false;
- }
- }
-
- if ( $name == "text" && isset( $attribs['id'] ) ) {
- $text = $this->getText( $attribs['id'] );
- $this->openElement = array( $name, array( 'xml:space' => 'preserve' ) );
- if ( strlen( $text ) > 0 ) {
- $this->characterData( $parser, $text );
- }
- } else {
- $this->openElement = array( $name, $attribs );
- }
- }
-
- function endElement( $parser, $name ) {
- if ( $this->openElement ) {
- $this->clearOpenElement( "" );
- } else {
- $this->buffer .= "</$name>";
- }
-
- if ( $name == 'revision' ) {
- $this->egress->writeRevision( null, $this->buffer );
- $this->buffer = "";
- $this->thisRev = "";
- } elseif ( $name == 'page' ) {
- $this->egress->writeClosePage( $this->buffer );
- $this->buffer = "";
- $this->thisPage = "";
- } elseif ( $name == 'mediawiki' ) {
- $this->egress->writeCloseStream( $this->buffer );
- $this->buffer = "";
- }
- }
-
- function characterData( $parser, $data ) {
- $this->clearOpenElement( null );
- if ( $this->lastName == "id" ) {
- if ( $this->state == "revision" ) {
- $this->thisRev .= $data;
- } elseif ( $this->state == "page" ) {
- $this->thisPage .= $data;
- }
- }
- $this->buffer .= htmlspecialchars( $data );
- }
-
- function clearOpenElement( $style ) {
- if ( $this->openElement ) {
- $this->buffer .= Xml::element( $this->openElement[0], $this->openElement[1], $style );
- $this->openElement = false;
- }
- }
-}
+require_once( dirname( __FILE__ ) . '/backupTextPass.inc' );
$dumper = new TextPassDumper( $argv );
--prefetch=<type>:<file> Use a prior dump file as a text source, to save
pressure on the database.
(Requires the XMLReader extension)
+ --maxtime=<minutes> Write out checkpoint file after this many minutes (writing
+ out complete page, closing xml file properly, and opening new one
+ with header). This option requires the checkpointfile option.
+ --checkpointfile=<filenamepattern> Use this string for checkpoint filenames,
+ substituting first pageid written for the first %s (required) and the
+ last pageid written for the second %s if it exists.
--quiet Don't dump status reports to stderr.
--report=n Report position and speed after every n pages processed.
(Default: 100)
dépôts / lhc / web / wiklou.git / blobdiff