391 lines
9 KiB
PHP
391 lines
9 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Bart Visscher <bartv@thisnet.nl>
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* @author Christian Weiske <cweiske@cweiske.de>
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* @author Christopher Schäpers <kondou@ts.unde.re>
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* @author Felix Moeller <mail@felixmoeller.de>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Remco Brenninkmeijer <requist1@starmail.nl>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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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 Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\Archive;
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class TAR extends Archive {
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const PLAIN = 0;
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const GZIP = 1;
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const BZIP = 2;
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private $fileList;
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private $cachedHeaders;
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/**
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* @var \Archive_Tar tar
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*/
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private $tar = null;
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private $path;
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/**
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* @param string $source
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*/
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function __construct($source) {
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$types = array(null, 'gz', 'bz2');
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$this->path = $source;
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$this->tar = new \Archive_Tar($source, $types[self::getTarType($source)]);
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}
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/**
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* try to detect the type of tar compression
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*
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* @param string $file
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* @return integer
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*/
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static public function getTarType($file) {
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if (strpos($file, '.')) {
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$extension = substr($file, strrpos($file, '.'));
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switch ($extension) {
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case '.gz':
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case '.tgz':
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return self::GZIP;
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case '.bz':
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case '.bz2':
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return self::BZIP;
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case '.tar':
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return self::PLAIN;
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default:
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return self::PLAIN;
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}
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} else {
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return self::PLAIN;
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}
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}
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/**
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* add an empty folder to the archive
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*
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* @param string $path
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* @return bool
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*/
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function addFolder($path) {
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$tmpBase = \OC::$server->getTempManager()->getTemporaryFolder();
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if (substr($path, -1, 1) != '/') {
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$path .= '/';
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}
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if ($this->fileExists($path)) {
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return false;
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}
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$parts = explode('/', $path);
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$folder = $tmpBase;
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foreach ($parts as $part) {
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$folder .= '/' . $part;
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if (!is_dir($folder)) {
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mkdir($folder);
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}
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}
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$result = $this->tar->addModify(array($tmpBase . $path), '', $tmpBase);
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rmdir($tmpBase . $path);
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$this->fileList = false;
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$this->cachedHeaders = false;
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return $result;
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}
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/**
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* add a file to the archive
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*
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* @param string $path
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* @param string $source either a local file or string data
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* @return bool
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*/
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function addFile($path, $source = '') {
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if ($this->fileExists($path)) {
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$this->remove($path);
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}
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if ($source and $source[0] == '/' and file_exists($source)) {
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$source = file_get_contents($source);
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}
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$result = $this->tar->addString($path, $source);
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$this->fileList = false;
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$this->cachedHeaders = false;
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return $result;
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}
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/**
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* rename a file or folder in the archive
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*
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* @param string $source
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* @param string $dest
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* @return bool
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*/
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function rename($source, $dest) {
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//no proper way to delete, rename entire archive, rename file and remake archive
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$tmp = \OCP\Files::tmpFolder();
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$this->tar->extract($tmp);
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rename($tmp . $source, $tmp . $dest);
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$this->tar = null;
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unlink($this->path);
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$types = array(null, 'gz', 'bz');
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$this->tar = new \Archive_Tar($this->path, $types[self::getTarType($this->path)]);
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$this->tar->createModify(array($tmp), '', $tmp . '/');
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$this->fileList = false;
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$this->cachedHeaders = false;
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return true;
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}
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/**
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* @param string $file
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*/
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private function getHeader($file) {
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if (!$this->cachedHeaders) {
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$this->cachedHeaders = $this->tar->listContent();
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}
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foreach ($this->cachedHeaders as $header) {
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if ($file == $header['filename']
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or $file . '/' == $header['filename']
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or '/' . $file . '/' == $header['filename']
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or '/' . $file == $header['filename']
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) {
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return $header;
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}
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}
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return null;
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}
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/**
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* get the uncompressed size of a file in the archive
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*
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* @param string $path
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* @return int
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*/
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function filesize($path) {
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$stat = $this->getHeader($path);
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return $stat['size'];
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}
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/**
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* get the last modified time of a file in the archive
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*
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* @param string $path
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* @return int
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*/
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function mtime($path) {
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$stat = $this->getHeader($path);
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return $stat['mtime'];
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}
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/**
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* get the files in a folder
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*
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* @param string $path
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* @return array
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*/
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function getFolder($path) {
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$files = $this->getFiles();
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$folderContent = array();
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$pathLength = strlen($path);
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foreach ($files as $file) {
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if ($file[0] == '/') {
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$file = substr($file, 1);
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}
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if (substr($file, 0, $pathLength) == $path and $file != $path) {
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$result = substr($file, $pathLength);
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if ($pos = strpos($result, '/')) {
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$result = substr($result, 0, $pos + 1);
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}
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if (array_search($result, $folderContent) === false) {
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$folderContent[] = $result;
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}
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}
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}
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return $folderContent;
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}
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/**
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* get all files in the archive
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*
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* @return array
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*/
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function getFiles() {
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if ($this->fileList) {
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return $this->fileList;
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}
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if (!$this->cachedHeaders) {
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$this->cachedHeaders = $this->tar->listContent();
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}
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$files = array();
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foreach ($this->cachedHeaders as $header) {
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$files[] = $header['filename'];
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}
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$this->fileList = $files;
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return $files;
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}
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/**
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* get the content of a file
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*
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* @param string $path
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* @return string
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*/
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function getFile($path) {
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return $this->tar->extractInString($path);
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}
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/**
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* extract a single file from the archive
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*
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* @param string $path
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* @param string $dest
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* @return bool
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*/
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function extractFile($path, $dest) {
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$tmp = \OCP\Files::tmpFolder();
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if (!$this->fileExists($path)) {
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return false;
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}
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if ($this->fileExists('/' . $path)) {
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$success = $this->tar->extractList(array('/' . $path), $tmp);
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} else {
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$success = $this->tar->extractList(array($path), $tmp);
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}
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if ($success) {
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rename($tmp . $path, $dest);
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}
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\OCP\Files::rmdirr($tmp);
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return $success;
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}
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/**
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* extract the archive
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*
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* @param string $dest
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* @return bool
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*/
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function extract($dest) {
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return $this->tar->extract($dest);
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}
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/**
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* check if a file or folder exists in the archive
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*
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* @param string $path
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* @return bool
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*/
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function fileExists($path) {
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$files = $this->getFiles();
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if ((array_search($path, $files) !== false) or (array_search($path . '/', $files) !== false)) {
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return true;
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} else {
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$folderPath = $path;
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if (substr($folderPath, -1, 1) != '/') {
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$folderPath .= '/';
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}
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$pathLength = strlen($folderPath);
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foreach ($files as $file) {
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if (strlen($file) > $pathLength and substr($file, 0, $pathLength) == $folderPath) {
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return true;
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}
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}
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}
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if ($path[0] != '/') { //not all programs agree on the use of a leading /
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return $this->fileExists('/' . $path);
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} else {
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return false;
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}
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}
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/**
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* remove a file or folder from the archive
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*
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* @param string $path
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* @return bool
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*/
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function remove($path) {
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if (!$this->fileExists($path)) {
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return false;
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}
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$this->fileList = false;
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$this->cachedHeaders = false;
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//no proper way to delete, extract entire archive, delete file and remake archive
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$tmp = \OCP\Files::tmpFolder();
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$this->tar->extract($tmp);
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\OCP\Files::rmdirr($tmp . $path);
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$this->tar = null;
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unlink($this->path);
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$this->reopen();
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$this->tar->createModify(array($tmp), '', $tmp);
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return true;
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}
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/**
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* get a file handler
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*
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* @param string $path
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* @param string $mode
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* @return resource
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*/
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function getStream($path, $mode) {
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if (strrpos($path, '.') !== false) {
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$ext = substr($path, strrpos($path, '.'));
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} else {
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$ext = '';
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}
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$tmpFile = \OCP\Files::tmpFile($ext);
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if ($this->fileExists($path)) {
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$this->extractFile($path, $tmpFile);
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} elseif ($mode == 'r' or $mode == 'rb') {
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return false;
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}
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if ($mode == 'r' or $mode == 'rb') {
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return fopen($tmpFile, $mode);
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} else {
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\OC\Files\Stream\Close::registerCallback($tmpFile, array($this, 'writeBack'));
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self::$tempFiles[$tmpFile] = $path;
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return fopen('close://' . $tmpFile, $mode);
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}
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}
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private static $tempFiles = array();
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/**
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* write back temporary files
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*/
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function writeBack($tmpFile) {
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if (isset(self::$tempFiles[$tmpFile])) {
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$this->addFile(self::$tempFiles[$tmpFile], $tmpFile);
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unlink($tmpFile);
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}
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}
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/**
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* reopen the archive to ensure everything is written
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*/
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private function reopen() {
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if ($this->tar) {
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$this->tar->_close();
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$this->tar = null;
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}
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$types = array(null, 'gz', 'bz');
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$this->tar = new \Archive_Tar($this->path, $types[self::getTarType($this->path)]);
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}
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}
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