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<?php
/**
* @copyright Copyright (c) 2017 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\Exception\MultipartUploadException;
use Aws\S3\MultipartUploader;
use Aws\S3\S3Client;
use Psr\Http\Message\StreamInterface;
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);
$opts = [
'http' => [
'header' => $request->getHeaders()
]
];
$context = stream_context_create($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) {
$stat = fstat($stream);
if ($stat['size'] && $stat['size'] < S3_UPLOAD_PART_SIZE) {
$this->singlePartUpload($urn, $stream);
} else {
$this->multiPartUpload($urn, $stream);
}
}
protected function singlePartUpload($urn, $stream) {
$this->getConnection()->putObject([
'Bucket' => $this->bucket,
'Key' => $urn,
'Body' => $stream
]);
}
protected function multiPartUpload($urn, $stream) {
$uploader = new MultipartUploader($this->getConnection(), $stream, [
'bucket' => $this->bucket,
'key' => $urn,
'part_size' => S3_UPLOAD_PART_SIZE
]);
$tries = 0;
do {
try {
$result = $uploader->upload();
} catch (MultipartUploadException $e) {
\OC::$server->getLogger()->logException($e);
rewind($stream);
$tries++;
if ($tries < 5) {
$uploader = new MultipartUploader($this->getConnection(), $stream, [
'state' => $e->getState()
]);
} else {
$this->getConnection()->abortMultipartUpload($e->getState()->getId());
throw $e;
}
}
} while (!isset($result) && $tries < 5);
}
/**
* @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
]);
}
}
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