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<?php
/**
* @author Jörn Friedrich Dreyer
* @copyright (c) 2014 Jörn Friedrich Dreyer <jfd@owncloud.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\Files\ObjectStore;
use Guzzle\Http\Exception\ClientErrorResponseException;
use OCP\Files\ObjectStore\IObjectStore;
use OpenCloud\OpenStack;
use OpenCloud\Rackspace;
class Swift implements IObjectStore {
/**
* @var \OpenCloud\ObjectStore\Service
*/
private $objectStoreService;
/**
* @var \OpenCloud\ObjectStore\Resource\Container
*/
private $container;
public function __construct($params) {
if (!isset($params['container'])) {
$params['container'] = 'owncloud';
}
if (!isset($params['autocreate'])) {
// should only be true for tests
$params['autocreate'] = false;
}
// the OpenCloud client library will default to 'cloudFiles' if $serviceName is null
$serviceName = null;
if ($params['serviceName']) {
$serviceName = $params['serviceName'];
}
if (isset($params['apiKey'])) {
$client = new Rackspace($params['url'], $params);
} else {
$client = new OpenStack($params['url'], $params);
}
$this->objectStoreService = $client->objectStoreService($serviceName, $params['region']);
try {
$this->container = $this->objectStoreService->getContainer($params['container']);
} catch (ClientErrorResponseException $ex) {
// if the container does not exist and autocreate is true try to create the container on the fly
if (isset($params['autocreate']) && $params['autocreate'] === true) {
$this->container = $this->objectStoreService->createContainer($params['container']);
} else {
throw $ex;
}
}
}
/**
* @return string the container name where objects are stored
*/
public function getStorageId() {
return $this->container->name;
}
/**
* @param string $urn the unified resource name used to identify the object
* @param resource $stream stream with the data to write
* @throws Exception from openstack lib when something goes wrong
*/
public function writeObject($urn, $stream) {
$this->container->uploadObject($urn, $stream);
}
/**
* @param string $urn the unified resource name used to identify the object
* @return resource stream with the read data
* @throws Exception from openstack lib when something goes wrong
*/
public function readObject($urn) {
$object = $this->container->getObject($urn);
// we need to keep a reference to objectContent or
// the stream will be closed before we can do anything with it
/** @var $objectContent \Guzzle\Http\EntityBody * */
$objectContent = $object->getContent();
$objectContent->rewind();
// directly returning the object stream does not work because the GC seems to collect it, so we need a copy
$tmpStream = fopen('php://temp', 'r+');
stream_copy_to_stream($objectContent->getStream(), $tmpStream);
rewind($tmpStream);
return $tmpStream;
}
/**
* @param string $urn Unified Resource Name
* @return void
* @throws Exception from openstack lib when something goes wrong
*/
public function deleteObject($urn) {
$object = $this->container->getObject($urn);
$object->delete();
}
public function deleteContainer($recursive = false) {
$this->container->delete($recursive);
}
}
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