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- <?php
- /**
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- *
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Felix Moeller <mail@felixmoeller.de>
- * @author Jörn Friedrich Dreyer <jfd@butonic.de>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin Appelman <robin@icewind.nl>
- * @author Roeland Jago Douma <roeland@famdouma.nl>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- * @author Thomas Tanghus <thomas@tanghus.net>
- * @author Vincent Petry <pvince81@owncloud.com>
- *
- * @license AGPL-3.0
- *
- * This code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License, version 3,
- * as published by the Free Software Foundation.
- *
- * 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 Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License, version 3,
- * along with this program. If not, see <http://www.gnu.org/licenses/>
- *
- */
- class OC_FileChunking {
- protected $info;
- protected $cache;
- /**
- * TTL of chunks
- *
- * @var int
- */
- protected $ttl;
- static public function decodeName($name) {
- preg_match('/(?P<name>.*)-chunking-(?P<transferid>\d+)-(?P<chunkcount>\d+)-(?P<index>\d+)/', $name, $matches);
- return $matches;
- }
- /**
- * @param string[] $info
- */
- public function __construct($info) {
- $this->info = $info;
- $this->ttl = \OC::$server->getConfig()->getSystemValue('cache_chunk_gc_ttl', 86400);
- }
- public function getPrefix() {
- $name = $this->info['name'];
- $transferid = $this->info['transferid'];
- return $name.'-chunking-'.$transferid.'-';
- }
- protected function getCache() {
- if (!isset($this->cache)) {
- $this->cache = new \OC\Cache\File();
- }
- return $this->cache;
- }
- /**
- * Stores the given $data under the given $key - the number of stored bytes is returned
- *
- * @param string $index
- * @param resource $data
- * @return int
- */
- public function store($index, $data) {
- $cache = $this->getCache();
- $name = $this->getPrefix().$index;
- $cache->set($name, $data, $this->ttl);
- return $cache->size($name);
- }
- public function isComplete() {
- $prefix = $this->getPrefix();
- $cache = $this->getCache();
- $chunkcount = (int)$this->info['chunkcount'];
- for($i=($chunkcount-1); $i >= 0; $i--) {
- if (!$cache->hasKey($prefix.$i)) {
- return false;
- }
- }
- return true;
- }
- /**
- * Assembles the chunks into the file specified by the path.
- * Chunks are deleted afterwards.
- *
- * @param resource $f target path
- *
- * @return integer assembled file size
- *
- * @throws \OC\InsufficientStorageException when file could not be fully
- * assembled due to lack of free space
- */
- public function assemble($f) {
- $cache = $this->getCache();
- $prefix = $this->getPrefix();
- $count = 0;
- for ($i = 0; $i < $this->info['chunkcount']; $i++) {
- $chunk = $cache->get($prefix.$i);
- // remove after reading to directly save space
- $cache->remove($prefix.$i);
- $count += fwrite($f, $chunk);
- // let php release the memory to work around memory exhausted error with php 5.6
- $chunk = null;
- }
- return $count;
- }
- /**
- * Returns the size of the chunks already present
- * @return integer size in bytes
- */
- public function getCurrentSize() {
- $cache = $this->getCache();
- $prefix = $this->getPrefix();
- $total = 0;
- for ($i = 0; $i < $this->info['chunkcount']; $i++) {
- $total += $cache->size($prefix.$i);
- }
- return $total;
- }
- /**
- * Removes all chunks which belong to this transmission
- */
- public function cleanup() {
- $cache = $this->getCache();
- $prefix = $this->getPrefix();
- for($i=0; $i < $this->info['chunkcount']; $i++) {
- $cache->remove($prefix.$i);
- }
- }
- /**
- * Removes one specific chunk
- * @param string $index
- */
- public function remove($index) {
- $cache = $this->getCache();
- $prefix = $this->getPrefix();
- $cache->remove($prefix.$index);
- }
- /**
- * Assembles the chunks into the file specified by the path.
- * Also triggers the relevant hooks and proxies.
- *
- * @param \OC\Files\Storage\Storage $storage storage
- * @param string $path target path relative to the storage
- * @return bool true on success or false if file could not be created
- *
- * @throws \OC\ServerNotAvailableException
- */
- public function file_assemble($storage, $path) {
- // use file_put_contents as method because that best matches what this function does
- if (\OC\Files\Filesystem::isValidPath($path)) {
- $target = $storage->fopen($path, 'w');
- if ($target) {
- $count = $this->assemble($target);
- fclose($target);
- return $count > 0;
- } else {
- return false;
- }
- }
- return false;
- }
- }
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