98 lines
2.8 KiB
PHP
98 lines
2.8 KiB
PHP
<?php
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/**
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* Communications protocol.
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* This is used by dumpTextPass.php when the --spawn option is present.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @ingroup Maintenance
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*/
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require_once __DIR__ . '/Maintenance.php';
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use MediaWiki\MediaWikiServices;
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use MediaWiki\Storage\BlobAccessException;
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use MediaWiki\Storage\BlobStore;
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use MediaWiki\Storage\SqlBlobStore;
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/**
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* Maintenance script used to fetch page text in a subprocess.
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*
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* @ingroup Maintenance
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*/
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class FetchText extends Maintenance {
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public function __construct() {
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parent::__construct();
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$this->addDescription( "Fetch the raw revision blob from a blob address.\n" .
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"Integer IDs are interpreted as referring to text.old_id for backwards compatibility.\n" .
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"NOTE: Export transformations are NOT applied. " .
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"This is left to dumpTextPass.php"
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);
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}
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/**
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* @return BlobStore
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*/
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private function getBlobStore() {
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return MediaWikiServices::getInstance()->getBlobStore();
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}
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/**
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* returns a string containing the following in order:
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* textid
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* \n
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* length of text (-1 on error = failure to retrieve/unserialize/gunzip/etc)
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* \n
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* text (may be empty)
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*
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* note that the text string itself is *not* followed by newline
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*/
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public function execute() {
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$stdin = $this->getStdin();
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while ( !feof( $stdin ) ) {
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$line = fgets( $stdin );
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if ( $line === false ) {
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// We appear to have lost contact...
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break;
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}
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$blobAddress = trim( $line );
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// Plain integers are supported for backwards compatibility with pre-MCR dumps.
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if ( strpos( $blobAddress, ':' ) === false && is_numeric( $blobAddress ) ) {
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$blobAddress = SqlBlobStore::makeAddressFromTextId( intval( $blobAddress ) );
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}
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try {
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$text = $this->getBlobStore()->getBlob( $blobAddress );
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$textLen = strlen( $text );
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} catch ( BlobAccessException | InvalidArgumentException $ex ) {
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// XXX: log $ex to stderr?
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$textLen = '-1';
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$text = '';
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}
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$this->output( $blobAddress . "\n" . $textLen . "\n" . $text );
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}
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}
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}
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$maintClass = FetchText::class;
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require_once RUN_MAINTENANCE_IF_MAIN;
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