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<?php
/**
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Robin Appelman <icewind@owncloud.com>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @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/>
*
*/
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\OpenStack
*/
private $client;
/**
* @var array
*/
private $params;
/**
* @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
$params['autocreate'] = false;
}
if (isset($params['apiKey'])) {
$this->client = new Rackspace($params['url'], $params);
} else {
$this->client = new OpenStack($params['url'], $params);
}
$this->params = $params;
}
protected function init() {
if ($this->container) {
return;
}
// the OpenCloud client library will default to 'cloudFiles' if $serviceName is null
$serviceName = null;
if ($this->params['serviceName']) {
$serviceName = $this->params['serviceName'];
}
$this->objectStoreService = $this->client->objectStoreService($serviceName, $this->params['region']);
try {
$this->container = $this->objectStoreService->getContainer($this->params['container']);
} catch (ClientErrorResponseException $ex) {
// if the container does not exist and autocreate is true try to create the container on the fly
if (isset($this->params['autocreate']) && $this->params['autocreate'] === true) {
$this->container = $this->objectStoreService->createContainer($this->params['container']);
} else {
throw $ex;
}
}
}
/**
* @return string the container name where objects are stored
*/
public function getStorageId() {
return $this->params['container'];
}
/**
* @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->init();
$this->container->uploadObject($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) {
$this->init();
$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();
$stream = $objectContent->getStream();
// save the object content in the context of the stream to prevent it being gc'd until the stream is closed
stream_context_set_option($stream, 'swift','content', $objectContent);
return $stream;
}
/**
* @param string $urn Unified Resource Name
* @return void
* @throws Exception from openstack lib when something goes wrong
*/
public function deleteObject($urn) {
$this->init();
// see https://github.com/rackspace/php-opencloud/issues/243#issuecomment-30032242
$this->container->dataObject()->setName($urn)->delete();
}
public function deleteContainer($recursive = false) {
$this->init();
$this->container->delete($recursive);
}
}
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