1 files changed, 96 insertions, 0 deletions
diff --git a/www/wiki/maintenance/7zip.inc b/www/wiki/maintenance/7zip.inc
new file mode 100644
index 00000000..9c1093be
--- /dev/null
+++ b/www/wiki/maintenance/7zip.inc
@@ -0,0 +1,96 @@
+<?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::class );