diff options
Diffstat (limited to 'lib/private/Collaboration/Reference/LinkReferenceProvider.php')
| -rw-r--r-- | lib/private/Collaboration/Reference/LinkReferenceProvider.php | 178 |
1 files changed, 5 insertions, 173 deletions
diff --git a/lib/private/Collaboration/Reference/LinkReferenceProvider.php b/lib/private/Collaboration/Reference/LinkReferenceProvider.php index df6c6cc9da9..5af23bf633d 100644 --- a/lib/private/Collaboration/Reference/LinkReferenceProvider.php +++ b/lib/private/Collaboration/Reference/LinkReferenceProvider.php @@ -2,182 +2,14 @@ declare(strict_types=1); /** - * @copyright Copyright (c) 2022 Julius Härtl <jus@bitgrid.net> - * - * @author Julius Härtl <jus@bitgrid.net> - * - * @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/>. + * SPDX-FileCopyrightText: 2022 Nextcloud GmbH and Nextcloud contributors + * SPDX-License-Identifier: AGPL-3.0-or-later */ namespace OC\Collaboration\Reference; -use Fusonic\OpenGraph\Consumer; -use GuzzleHttp\Exception\GuzzleException; -use GuzzleHttp\Psr7\LimitStream; -use GuzzleHttp\Psr7\Utils; -use OC\Security\RateLimiting\Exception\RateLimitExceededException; -use OC\Security\RateLimiting\Limiter; -use OC\SystemConfig; -use OCP\Collaboration\Reference\IReference; -use OCP\Collaboration\Reference\IReferenceProvider; -use OCP\Collaboration\Reference\Reference; -use OCP\Files\AppData\IAppDataFactory; -use OCP\Files\NotFoundException; -use OCP\Http\Client\IClientService; -use OCP\IRequest; -use OCP\IURLGenerator; -use OCP\IUserSession; -use Psr\Log\LoggerInterface; +use OCP\Collaboration\Reference\LinkReferenceProvider as OCPLinkReferenceProvider; -class LinkReferenceProvider implements IReferenceProvider { - public const MAX_PREVIEW_SIZE = 1024 * 1024; - - public const ALLOWED_CONTENT_TYPES = [ - 'image/png', - 'image/jpg', - 'image/jpeg', - 'image/gif', - 'image/svg+xml', - 'image/webp' - ]; - - public function __construct( - private IClientService $clientService, - private LoggerInterface $logger, - private SystemConfig $systemConfig, - private IAppDataFactory $appDataFactory, - private IURLGenerator $urlGenerator, - private Limiter $limiter, - private IUserSession $userSession, - private IRequest $request, - ) { - } - - public function matchReference(string $referenceText): bool { - if ($this->systemConfig->getValue('reference_opengraph', true) !== true) { - return false; - } - - return (bool)preg_match(IURLGenerator::URL_REGEX, $referenceText); - } - - public function resolveReference(string $referenceText): ?IReference { - if ($this->matchReference($referenceText)) { - $reference = new Reference($referenceText); - $this->fetchReference($reference); - return $reference; - } - - return null; - } - - private function fetchReference(Reference $reference): void { - try { - $user = $this->userSession->getUser(); - if ($user) { - $this->limiter->registerUserRequest('opengraph', 10, 120, $user); - } else { - $this->limiter->registerAnonRequest('opengraph', 10, 120, $this->request->getRemoteAddress()); - } - } catch (RateLimitExceededException $e) { - return; - } - - $client = $this->clientService->newClient(); - try { - $headResponse = $client->head($reference->getId(), [ 'timeout' => 10 ]); - } catch (\Exception $e) { - $this->logger->debug('Failed to perform HEAD request to get target metadata', ['exception' => $e]); - return; - } - $linkContentLength = $headResponse->getHeader('Content-Length'); - if (is_numeric($linkContentLength) && (int) $linkContentLength > 5 * 1024 * 1024) { - $this->logger->debug('Skip resolving links pointing to content length > 5 MB'); - return; - } - $linkContentType = $headResponse->getHeader('Content-Type'); - $expectedContentType = 'text/html'; - $suffixedExpectedContentType = $expectedContentType . ';'; - $startsWithSuffixed = str_starts_with($linkContentType, $suffixedExpectedContentType); - // check the header begins with the expected content type - if ($linkContentType !== $expectedContentType && !$startsWithSuffixed) { - $this->logger->debug('Skip resolving links pointing to content type that is not "text/html"'); - return; - } - try { - $response = $client->get($reference->getId(), [ 'timeout' => 10 ]); - } catch (\Exception $e) { - $this->logger->debug('Failed to fetch link for obtaining open graph data', ['exception' => $e]); - return; - } - - $responseBody = (string)$response->getBody(); - - // OpenGraph handling - $consumer = new Consumer(); - $consumer->useFallbackMode = true; - $object = $consumer->loadHtml($responseBody); - - $reference->setUrl($reference->getId()); - - if ($object->title) { - $reference->setTitle($object->title); - } - - if ($object->description) { - $reference->setDescription($object->description); - } - - if ($object->images) { - try { - $host = parse_url($object->images[0]->url, PHP_URL_HOST); - if ($host === false || $host === null) { - $this->logger->warning('Could not detect host of open graph image URI for ' . $reference->getId()); - } else { - $appData = $this->appDataFactory->get('core'); - try { - $folder = $appData->getFolder('opengraph'); - } catch (NotFoundException $e) { - $folder = $appData->newFolder('opengraph'); - } - $response = $client->get($object->images[0]->url, ['timeout' => 10]); - $contentType = $response->getHeader('Content-Type'); - $contentLength = $response->getHeader('Content-Length'); - - if (in_array($contentType, self::ALLOWED_CONTENT_TYPES, true) && $contentLength < self::MAX_PREVIEW_SIZE) { - $stream = Utils::streamFor($response->getBody()); - $bodyStream = new LimitStream($stream, self::MAX_PREVIEW_SIZE, 0); - $reference->setImageContentType($contentType); - $folder->newFile(md5($reference->getId()), $bodyStream->getContents()); - $reference->setImageUrl($this->urlGenerator->linkToRouteAbsolute('core.Reference.preview', ['referenceId' => md5($reference->getId())])); - } - } - } catch (GuzzleException $e) { - $this->logger->info('Failed to fetch and store the open graph image for ' . $reference->getId(), ['exception' => $e]); - } catch (\Throwable $e) { - $this->logger->error('Failed to fetch and store the open graph image for ' . $reference->getId(), ['exception' => $e]); - } - } - } - - public function getCachePrefix(string $referenceId): string { - return $referenceId; - } - - public function getCacheKey(string $referenceId): ?string { - return null; - } +/** @deprecated 29.0.0 Use OCP\Collaboration\Reference\LinkReferenceProvider instead */ +class LinkReferenceProvider extends OCPLinkReferenceProvider { } |