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<?php
/**
* @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
*
* @author Robin Appelman <robin@icewind.nl>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\Files\ObjectStore;
use Aws\S3\Exception\S3MultipartUploadException;
use Aws\S3\MultipartUploader;
use Aws\S3\ObjectUploader;
use Aws\S3\S3Client;
use Icewind\Streams\CallbackWrapper;
const S3_UPLOAD_PART_SIZE = 524288000; // 500MB
trait S3ObjectTrait {
/**
* Returns the connection
*
* @return S3Client connected client
* @throws \Exception if connection could not be made
*/
abstract protected function getConnection();
/**
* @param string $urn the unified resource name used to identify the object
* @return resource stream with the read data
* @throws \Exception when something goes wrong, message will be logged
* @since 7.0.0
*/
function readObject($urn) {
$client = $this->getConnection();
$command = $client->getCommand('GetObject', [
'Bucket' => $this->bucket,
'Key' => $urn
]);
$request = \Aws\serialize($command);
$headers = [];
foreach ($request->getHeaders() as $key => $values) {
foreach ($values as $value) {
$headers[] = "$key: $value";
}
}
$opts = [
'http' => [
'protocol_version' => 1.1,
'header' => $headers
]
];
$context = stream_context_create($opts);
return fopen($request->getUri(), 'r', false, $context);
}
/**
* @param string $urn the unified resource name used to identify the object
* @param resource $stream stream with the data to write
* @throws \Exception when something goes wrong, message will be logged
* @since 7.0.0
*/
function writeObject($urn, $stream) {
$count = 0;
$countStream = CallbackWrapper::wrap($stream, function ($read) use (&$count) {
$count += $read;
});
$uploader = new MultipartUploader($this->getConnection(), $countStream, [
'bucket' => $this->bucket,
'key' => $urn,
'part_size' => S3_UPLOAD_PART_SIZE
]);
try {
$uploader->upload();
} catch (S3MultipartUploadException $e) {
// This is an emty file so just touch it then
if ($count === 0 && feof($countStream)) {
$uploader = new ObjectUploader($this->getConnection(), $this->bucket, $urn, '');
$uploader->upload();
} else {
throw $e;
}
}
fclose($countStream);
}
/**
* @param string $urn the unified resource name used to identify the object
* @return void
* @throws \Exception when something goes wrong, message will be logged
* @since 7.0.0
*/
function deleteObject($urn) {
$this->getConnection()->deleteObject([
'Bucket' => $this->bucket,
'Key' => $urn
]);
}
public function objectExists($urn) {
return $this->getConnection()->doesObjectExist($this->bucket, $urn);
}
}