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<?php
/**
* @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
*
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Florent <florent@coppint.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.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\S3Client;
use GuzzleHttp\Psr7\Utils;
use OC\Files\Stream\SeekableHttpStream;
use GuzzleHttp\Psr7;
use Psr\Http\Message\StreamInterface;
trait S3ObjectTrait {
/**
* Returns the connection
*
* @return S3Client connected client
* @throws \Exception if connection could not be made
*/
abstract protected function getConnection();
abstract protected function getCertificateBundlePath(): ?string;
/**
* @param string $urn the unified resource name used to identify the object
* @return resource stream with the read data
* @throws \Exception when something goes wrong, message will be logged
* @since 7.0.0
*/
public function readObject($urn) {
return SeekableHttpStream::open(function ($range) use ($urn) {
$command = $this->getConnection()->getCommand('GetObject', [
'Bucket' => $this->bucket,
'Key' => $urn,
'Range' => 'bytes=' . $range,
]);
$request = \Aws\serialize($command);
$headers = [];
foreach ($request->getHeaders() as $key => $values) {
foreach ($values as $value) {
$headers[] = "$key: $value";
}
}
$opts = [
'http' => [
'protocol_version' => $request->getProtocolVersion(),
'header' => $headers,
],
'ssl' => [
'cafile' => $this->getCertificateBundlePath()
]
];
if ($this->getProxy()) {
$opts['http']['proxy'] = $this->getProxy();
$opts['http']['request_fulluri'] = true;
}
$context = stream_context_create($opts);
return fopen($request->getUri(), 'r', false, $context);
});
}
/**
* Single object put helper
*
* @param string $urn the unified resource name used to identify the object
* @param StreamInterface $stream stream with the data to write
* @param string|null $mimetype the mimetype to set for the remove object @since 22.0.0
* @throws \Exception when something goes wrong, message will be logged
*/
protected function writeSingle(string $urn, StreamInterface $stream, string $mimetype = null): void {
$this->getConnection()->putObject([
'Bucket' => $this->bucket,
'Key' => $urn,
'Body' => $stream,
'ACL' => 'private',
'ContentType' => $mimetype,
]);
}
/**
* Multipart upload helper that tries to avoid orphaned fragments in S3
*
* @param string $urn the unified resource name used to identify the object
* @param StreamInterface $stream stream with the data to write
* @param string|null $mimetype the mimetype to set for the remove object
* @throws \Exception when something goes wrong, message will be logged
*/
protected function writeMultiPart(string $urn, StreamInterface $stream, string $mimetype = null): void {
$uploader = new MultipartUploader($this->getConnection(), $stream, [
'bucket' => $this->bucket,
'key' => $urn,
'part_size' => $this->uploadPartSize,
'params' => [
'ContentType' => $mimetype
],
]);
try {
$uploader->upload();
} catch (S3MultipartUploadException $e) {
// if anything goes wrong with multipart, make sure that you don´t poison and
// slow down s3 bucket with orphaned fragments
$uploadInfo = $e->getState()->getId();
if ($e->getState()->isInitiated() && (array_key_exists('UploadId', $uploadInfo))) {
$this->getConnection()->abortMultipartUpload($uploadInfo);
}
throw new \OCA\DAV\Connector\Sabre\Exception\BadGateway("Error while uploading to S3 bucket", 0, $e);
}
}
/**
* @param string $urn the unified resource name used to identify the object
* @param resource $stream stream with the data to write
* @param string|null $mimetype the mimetype to set for the remove object @since 22.0.0
* @throws \Exception when something goes wrong, message will be logged
* @since 7.0.0
*/
public function writeObject($urn, $stream, string $mimetype = null) {
$psrStream = Utils::streamFor($stream);
// ($psrStream->isSeekable() && $psrStream->getSize() !== null) evaluates to true for a On-Seekable stream
// so the optimisation does not apply
$buffer = new Psr7\Stream(fopen("php://memory", 'rwb+'));
Utils::copyToStream($psrStream, $buffer, $this->uploadPartSize);
$buffer->seek(0);
if ($buffer->getSize() < $this->putSizeLimit) {
// buffer is fully seekable, so use it directly for the small upload
$this->writeSingle($urn, $buffer, $mimetype);
} else {
$loadStream = new Psr7\AppendStream([$buffer, $psrStream]);
$this->writeMultiPart($urn, $loadStream, $mimetype);
}
}
/**
* @param string $urn the unified resource name used to identify the object
* @return void
* @throws \Exception when something goes wrong, message will be logged
* @since 7.0.0
*/
public function deleteObject($urn) {
$this->getConnection()->deleteObject([
'Bucket' => $this->bucket,
'Key' => $urn,
]);
}
public function objectExists($urn) {
return $this->getConnection()->doesObjectExist($this->bucket, $urn);
}
public function copyObject($from, $to) {
$this->getConnection()->copy($this->getBucket(), $from, $this->getBucket(), $to);
}
}
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