mirror of https://github.com/nextcloud/bookmarks
95 lines
2.4 KiB
PHP
95 lines
2.4 KiB
PHP
<?php
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/*
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* Copyright (c) 2020-2024. The Nextcloud Bookmarks contributors.
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*
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* This file is licensed under the Affero General Public License version 3 or later. See the COPYING file.
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*/
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namespace OCA\Bookmarks\Service\Previewers;
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use Exception;
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use OCA\Bookmarks\Contract\IBookmarkPreviewer;
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use OCA\Bookmarks\Contract\IImage;
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use OCA\Bookmarks\Db\Bookmark;
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use OCA\Bookmarks\Image;
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use OCA\Bookmarks\Service\LinkExplorer;
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use OCP\Http\Client\IClient;
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use OCP\Http\Client\IClientService;
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use Psr\Log\LoggerInterface;
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class DefaultBookmarkPreviewer implements IBookmarkPreviewer {
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public const CACHE_PREFIX = 'bookmarks.DefaultPreviewService';
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public const HTTP_TIMEOUT = 10 * 1000;
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/** @var IClient */
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protected $client;
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/** @var LinkExplorer */
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protected $linkExplorer;
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/** @var LoggerInterface */
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private $logger;
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/**
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* @param LinkExplorer $linkExplorer
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* @param IClientService $clientService
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* @param LoggerInterface $logger
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*/
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public function __construct(LinkExplorer $linkExplorer, IClientService $clientService, LoggerInterface $logger) {
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$this->linkExplorer = $linkExplorer;
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$this->client = $clientService->newClient();
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$this->logger = $logger;
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}
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/**
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* @param Bookmark $bookmark
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*
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* @return Image|null
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*/
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public function getImage($bookmark): ?IImage {
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if (!isset($bookmark)) {
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return null;
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}
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$site = $this->scrapeUrl($bookmark->getUrl());
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$this->logger->debug('getImage for URL: ' . $bookmark->getUrl() . ' ' . var_export($site, true), ['app' => 'bookmarks']);
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if (isset($site['image']['small'])) {
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return $this->fetchImage($site['image']['small']);
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}
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if (isset($site['image']['large'])) {
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return $this->fetchImage($site['image']['large']);
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}
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return null;
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}
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public function scrapeUrl($url): array {
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return $this->linkExplorer->get($url);
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}
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/**
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* @param $url
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* @return Image|null
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*/
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protected function fetchImage($url): ?Image {
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try {
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$response = $this->client->get($url, ['timeout' => self::HTTP_TIMEOUT]);
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} catch (Exception $e) {
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$this->logger->debug($e->getMessage(), ['app' => 'bookmarks']);
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return null;
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}
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$body = $response->getBody();
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$contentType = $response->getHeader('Content-Type');
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// Some HTPP Error occured :/
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if ($response->getStatusCode() !== 200) {
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return null;
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}
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// It's not actually an image, doh.
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if (!isset($contentType) || stripos($contentType, 'image') !== 0) {
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return null;
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}
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return new Image($contentType, $body);
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}
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}
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