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186 lines
4.8 KiB
186 lines
4.8 KiB
<?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 Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Felix Moeller <mail@felixmoeller.de>
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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 Robin Appelman <robin@icewind.nl>
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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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* @author Thomas Tanghus <thomas@tanghus.net>
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* @author Vincent Petry <pvince81@owncloud.com>
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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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class OC_FileChunking {
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protected $info;
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protected $cache;
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/**
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* TTL of chunks
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*
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* @var int
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*/
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protected $ttl;
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public static function decodeName($name) {
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preg_match('/(?P<name>.*)-chunking-(?P<transferid>\d+)-(?P<chunkcount>\d+)-(?P<index>\d+)/', $name, $matches);
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return $matches;
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}
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/**
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* @param string[] $info
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*/
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public function __construct($info) {
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$this->info = $info;
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$this->ttl = \OC::$server->getConfig()->getSystemValue('cache_chunk_gc_ttl', 86400);
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}
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public function getPrefix() {
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$name = $this->info['name'];
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$transferid = $this->info['transferid'];
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return $name.'-chunking-'.$transferid.'-';
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}
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protected function getCache() {
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if (!isset($this->cache)) {
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$this->cache = new \OC\Cache\File();
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}
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return $this->cache;
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}
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/**
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* Stores the given $data under the given $key - the number of stored bytes is returned
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*
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* @param string $index
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* @param resource $data
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* @return int
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*/
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public function store($index, $data) {
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$cache = $this->getCache();
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$name = $this->getPrefix().$index;
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$cache->set($name, $data, $this->ttl);
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return $cache->size($name);
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}
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public function isComplete() {
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$prefix = $this->getPrefix();
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$cache = $this->getCache();
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$chunkcount = (int)$this->info['chunkcount'];
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for ($i=($chunkcount-1); $i >= 0; $i--) {
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if (!$cache->hasKey($prefix.$i)) {
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return false;
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}
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}
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return true;
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}
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/**
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* Assembles the chunks into the file specified by the path.
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* Chunks are deleted afterwards.
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*
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* @param resource $f target path
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*
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* @return integer assembled file size
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*
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* @throws \OC\InsufficientStorageException when file could not be fully
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* assembled due to lack of free space
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*/
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public function assemble($f) {
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$cache = $this->getCache();
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$prefix = $this->getPrefix();
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$count = 0;
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for ($i = 0; $i < $this->info['chunkcount']; $i++) {
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$chunk = $cache->get($prefix.$i);
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// remove after reading to directly save space
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$cache->remove($prefix.$i);
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$count += fwrite($f, $chunk);
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// let php release the memory to work around memory exhausted error with php 5.6
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$chunk = null;
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}
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return $count;
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}
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/**
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* Returns the size of the chunks already present
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* @return integer size in bytes
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*/
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public function getCurrentSize() {
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$cache = $this->getCache();
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$prefix = $this->getPrefix();
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$total = 0;
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for ($i = 0; $i < $this->info['chunkcount']; $i++) {
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$total += $cache->size($prefix.$i);
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}
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return $total;
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}
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/**
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* Removes all chunks which belong to this transmission
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*/
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public function cleanup() {
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$cache = $this->getCache();
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$prefix = $this->getPrefix();
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for ($i=0; $i < $this->info['chunkcount']; $i++) {
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$cache->remove($prefix.$i);
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}
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}
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/**
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* Removes one specific chunk
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* @param string $index
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*/
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public function remove($index) {
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$cache = $this->getCache();
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$prefix = $this->getPrefix();
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$cache->remove($prefix.$index);
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}
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/**
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* Assembles the chunks into the file specified by the path.
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* Also triggers the relevant hooks and proxies.
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*
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* @param \OC\Files\Storage\Storage $storage storage
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* @param string $path target path relative to the storage
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* @return bool true on success or false if file could not be created
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*
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* @throws \OC\ServerNotAvailableException
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*/
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public function file_assemble($storage, $path) {
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// use file_put_contents as method because that best matches what this function does
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if (\OC\Files\Filesystem::isValidPath($path)) {
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$target = $storage->fopen($path, 'w');
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if ($target) {
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$count = $this->assemble($target);
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fclose($target);
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return $count > 0;
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} else {
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return false;
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}
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}
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return false;
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}
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}
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