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<?php
/**
* @copyright Copyright (c) 2020, Nextcloud, GmbH.
*
* @author Vincent Petry <vincent@nextcloud.com>
* @author Carl Schwan <carl@carlschwan.eu>
*
* @license AGPL-3.0-or-later
*
* 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\Preview;
use OCP\Files\File;
use OCP\Http\Client\IClientService;
use OCP\IConfig;
use OCP\IImage;
use OCP\Image;
use OC\StreamImage;
use Psr\Log\LoggerInterface;
class Imaginary extends ProviderV2 {
/** @var IConfig */
private $config;
/** @var IClientService */
private $service;
/** @var LoggerInterface */
private $logger;
public function __construct(array $config) {
parent::__construct($config);
$this->config = \OC::$server->get(IConfig::class);
$this->service = \OC::$server->get(IClientService::class);
$this->logger = \OC::$server->get(LoggerInterface::class);
}
/**
* {@inheritDoc}
*/
public function getMimeType(): string {
return self::supportedMimeTypes();
}
public static function supportedMimeTypes(): string {
return '/image\/(bmp|x-bitmap|png|jpeg|gif|heic|svg|webp)/';
}
public function getCroppedThumbnail(File $file, int $maxX, int $maxY, bool $crop): ?IImage {
$maxSizeForImages = $this->config->getSystemValue('preview_max_filesize_image', 50);
$size = $file->getSize();
if ($maxSizeForImages !== -1 && $size > ($maxSizeForImages * 1024 * 1024)) {
return null;
}
$imaginaryUrl = $this->config->getSystemValueString('preview_imaginary_url', 'invalid');
if ($imaginaryUrl === 'invalid') {
$this->logger->error('Imaginary preview provider is enabled, but no url is configured. Please provide the url of your imaginary server to the \'preview_imaginary_url\' config variable.');
return null;
}
$imaginaryUrl = rtrim($imaginaryUrl, '/');
// Object store
$stream = $file->fopen('r');
$httpClient = $this->service->newClient();
switch ($file->getMimeType()) {
case 'image/gif':
case 'image/png':
$mimeType = 'png';
break;
default:
$mimeType = 'jpeg';
}
$operations = [
[
'operation' => 'autorotate',
],
[
'operation' => ($crop ? 'smartcrop' : 'fit'),
'params' => [
'width' => $maxX,
'height' => $maxY,
'stripmeta' => 'true',
'type' => $mimeType,
'norotation' => 'true',
]
]
];
try {
$response = $httpClient->post(
$imaginaryUrl . '/pipeline', [
'query' => ['operations' => json_encode($operations)],
'stream' => true,
'content-type' => $file->getMimeType(),
'body' => $stream,
'nextcloud' => ['allow_local_address' => true],
]);
} catch (\Exception $e) {
$this->logger->error('Imaginary preview generation failed: ' . $e->getMessage(), [
'exception' => $e,
]);
return null;
}
if ($response->getStatusCode() !== 200) {
$this->logger->error('Imaginary preview generation failed: ' . json_decode($response->getBody())['message']);
return null;
}
// This is not optimal but previews are distorted if the wrong width and height values are
// used. Both dimension headers are only sent when passing the option "-return-size" to
// Imaginary.
if ($response->getHeader('Image-Width') && $response->getHeader('Image-Height')) {
$image = new StreamImage(
$response->getBody(),
$response->getHeader('Content-Type'),
(int)$response->getHeader('Image-Width'),
(int)$response->getHeader('Image-Height'),
);
} else {
$image = new Image();
$image->loadFromFileHandle($response->getBody());
}
return $image->valid() ? $image : null;
}
/**
* {@inheritDoc}
*/
public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage {
return $this->getCroppedThumbnail($file, $maxX, $maxY, false);
}
}
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