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<?php
/**
* Communications protocol.
* This is used by dumpTextPass.php when the --spawn option is present.
*
* 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 Maintenance
*/
require_once __DIR__ . '/Maintenance.php';
/**
* Maintenance script used to fetch page text in a subprocess.
*
* @ingroup Maintenance
*/
class FetchText extends Maintenance {
public function __construct() {
parent::__construct();
$this->mDescription = "Fetch the raw revision blob from an old_id.";
$this->mDescription .= "\nNOTE: Export transformations are NOT applied. This is left to backupTextPass.php";
}
/**
* returns a string containing the following in order:
* textid
* \n
* length of text (-1 on error = failure to retrieve/unserialize/gunzip/etc)
* \n
* text (may be empty)
*
* note that the text string itself is *not* followed by newline
*/
public function execute() {
$db = wfGetDB( DB_SLAVE );
$stdin = $this->getStdin();
while ( !feof( $stdin ) ) {
$line = fgets( $stdin );
if ( $line === false ) {
// We appear to have lost contact...
break;
}
$textId = intval( $line );
$text = $this->doGetText( $db, $textId );
if ( $text === false ) {
# actual error, not zero-length text
$textLen = "-1";
} else {
$textLen = strlen( $text );
}
$this->output( $textId . "\n" . $textLen . "\n" . $text );
}
}
/**
* May throw a database error if, say, the server dies during query.
* @param DatabaseBase $db
* @param int $id The old_id
* @return string
*/
private function doGetText( $db, $id ) {
$id = intval( $id );
$row = $db->selectRow( 'text',
array( 'old_text', 'old_flags' ),
array( 'old_id' => $id ),
__METHOD__ );
$text = Revision::getRevisionText( $row );
if ( $text === false ) {
return false;
}
return $text;
}
}
$maintClass = "FetchText";
require_once RUN_MAINTENANCE_IF_MAIN;
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