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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @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>
*
* @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 function GuzzleHttp\Psr7\stream_for;
use Icewind\Streams\RetryWrapper;
use OCP\Files\NotFoundException;
use OCP\Files\ObjectStore\IObjectStore;
use OCP\Files\StorageAuthException;
use OpenStack\Common\Error\BadResponseError;
const SWIFT_SEGMENT_SIZE = 1073741824; // 1GB
class Swift implements IObjectStore {
/**
* @var array
*/
private $params;
/** @var SwiftFactory */
private $swiftFactory;
public function __construct($params, SwiftFactory $connectionFactory = null) {
$this->swiftFactory = $connectionFactory ?: new SwiftFactory(
\OC::$server->getMemCacheFactory()->createDistributed('swift::'),
$params,
\OC::$server->getLogger()
);
$this->params = $params;
}
/**
* @return \OpenStack\ObjectStore\v1\Models\Container
* @throws StorageAuthException
* @throws \OCP\Files\StorageNotAvailableException
*/
private function getContainer() {
return $this->swiftFactory->getContainer();
}
/**
* @return string the container name where objects are stored
*/
public function getStorageId() {
if (isset($this->params['bucket'])) {
return $this->params['bucket'];
}
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) {
$tmpFile = \OC::$server->getTempManager()->getTemporaryFile('swiftwrite');
file_put_contents($tmpFile, $stream);
$handle = fopen($tmpFile, 'rb');
if (filesize($tmpFile) < SWIFT_SEGMENT_SIZE) {
$this->getContainer()->createObject([
'name' => $urn,
'stream' => stream_for($handle)
]);
} else {
$this->getContainer()->createLargeObject([
'name' => $urn,
'stream' => stream_for($handle),
'segmentSize' => SWIFT_SEGMENT_SIZE
]);
}
}
/**
* @param string $urn the unified resource name used to identify the object
* @return resource stream with the read data
* @throws \Exception from openstack lib when something goes wrong
* @throws NotFoundException if file does not exist
*/
public function readObject($urn) {
try {
$object = $this->getContainer()->getObject($urn);
// we need to keep a reference to objectContent or
// the stream will be closed before we can do anything with it
$objectContent = $object->download();
} catch (BadResponseError $e) {
if ($e->getResponse()->getStatusCode() === 404) {
throw new NotFoundException("object $urn not found in object store");
} else {
throw $e;
}
}
$objectContent->rewind();
$stream = $objectContent->detach();
// save the object content in the context of the stream to prevent it being gc'd until the stream is closed
stream_context_set_option($stream, 'swift', 'content', $objectContent);
return RetryWrapper::wrap($stream);
}
/**
* @param string $urn Unified Resource Name
* @return void
* @throws \Exception from openstack lib when something goes wrong
*/
public function deleteObject($urn) {
$this->getContainer()->getObject($urn)->delete();
}
/**
* @return void
* @throws \Exception from openstack lib when something goes wrong
*/
public function deleteContainer() {
$this->getContainer()->delete();
}
public function objectExists($urn) {
return $this->getContainer()->objectExists($urn);
}
}
|
