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<?php
/**
* 7z stream wrapper
*
* Copyright © 2005 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 Maintenance
*/
/**
* Stream wrapper around 7za filter program.
* Required since we can't pass an open file resource to XMLReader->open()
* which is used for the text prefetch.
*
* @ingroup Maintenance
*/
class SevenZipStream {
protected $stream;
private function stripPath( $path ) {
$prefix = 'mediawiki.compress.7z://';
return substr( $path, strlen( $prefix ) );
}
function stream_open( $path, $mode, $options, &$opened_path ) {
if ( $mode[0] == 'r' ) {
$options = 'e -bd -so';
} elseif ( $mode[0] == 'w' ) {
$options = 'a -bd -si';
} else {
return false;
}
$arg = wfEscapeShellArg( $this->stripPath( $path ) );
$command = "7za $options $arg";
if ( !wfIsWindows() ) {
// Suppress the stupid messages on stderr
$command .= ' 2>/dev/null';
}
$this->stream = popen( $command, $mode[0] ); // popen() doesn't like two-letter modes
return ( $this->stream !== false );
}
function url_stat( $path, $flags ) {
return stat( $this->stripPath( $path ) );
}
// This is all so lame; there should be a default class we can extend
function stream_close() {
return fclose( $this->stream );
}
function stream_flush() {
return fflush( $this->stream );
}
function stream_read( $count ) {
return fread( $this->stream, $count );
}
function stream_write( $data ) {
return fwrite( $this->stream, $data );
}
function stream_tell() {
return ftell( $this->stream );
}
function stream_eof() {
return feof( $this->stream );
}
function stream_seek( $offset, $whence ) {
return fseek( $this->stream, $offset, $whence );
}
}
stream_wrapper_register( 'mediawiki.compress.7z', 'SevenZipStream' );
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