SevenZipStream.php

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<?php
namespace MediaWiki\Maintenance;
 
use MediaWiki\Shell\Shell;
 
class SevenZipStream {
    protected $stream;
 
    public $context;
 
    public static function register() {
        static $done = false;
        if ( !$done ) {
            $done = true;
            stream_wrapper_register( 'mediawiki.compress.7z', self::class );
        }
    }
 
    private function stripPath( string $path ): string {
        $prefix = 'mediawiki.compress.7z://';
 
        return substr( $path, strlen( $prefix ) );
    }
 
    public 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 = Shell::escape( $this->stripPath( $path ) );
        $command = "7za $options $arg";
        if ( !wfIsWindows() ) {
            // Suppress the stupid messages on stderr
            $command .= ' 2>/dev/null';
        }
        // popen() doesn't like two-letter modes
        $this->stream = popen( $command, $mode[0] );
        return ( $this->stream !== false );
    }
 
    public function url_stat( $path, $flags ) {
        return stat( $this->stripPath( $path ) );
    }
 
    public function stream_close() {
        return fclose( $this->stream );
    }
 
    public function stream_flush() {
        return fflush( $this->stream );
    }
 
    public function stream_read( $count ) {
        return fread( $this->stream, $count );
    }
 
    public function stream_write( $data ) {
        return fwrite( $this->stream, $data );
    }
 
    public function stream_tell() {
        return ftell( $this->stream );
    }
 
    public function stream_eof() {
        return feof( $this->stream );
    }
 
    public function stream_seek( $offset, $whence ) {
        return fseek( $this->stream, $offset, $whence );
    }
}
 
class_alias( SevenZipStream::class, 'SevenZipStream' );