mirror of https://github.com/nextcloud/bookmarks
133 lines
3.3 KiB
PHP
133 lines
3.3 KiB
PHP
<?php
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/**
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* @author Marcel Klehr
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* @copyright 2018 Marcel Klehr mklehr@gmx.net
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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namespace OCA\Bookmarks\Controller\Lib\Previews;
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use Wnx\ScreeenlyClient\Screenshot;
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use OCP\ICache;
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use OCP\IConfig;
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use OCP\ICacheFactory;
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class ScreenlyPreviewService implements IPreviewService {
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// Cache for one month
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const CACHE_TTL = 4 * 7 * 24 * 60 * 60;
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private $apiKey;
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/** @var IConfig */
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private $config;
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/** @var ICache */
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private $cache;
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private $width = 800;
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private $height = 800;
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/**
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* @param ICacheFactory $cacheFactory
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*/
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public function __construct(ICacheFactory $cacheFactory, IConfig $config) {
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$this->config = $config;
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$this->apiUrl = $config->getAppValue('bookmarks', 'previews.screenly.url', 'http://screeenly.com/api/v1/fullsize');
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$this->apiKey = $config->getAppValue('bookmarks', 'previews.screenly.token', '');
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$this->cache = $cacheFactory->create('bookmarks.ScreenlyPreviewService');
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}
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private function buildKey($url) {
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return base64_encode($url);
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}
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/**
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* @param string $url
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* @return string|null image data
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*/
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public function getImage($bookmark) {
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if (!isset($bookmark)) {
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return null;
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}
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if ('' === $this->apiKey) {
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return null;
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}
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$url = $bookmark['url'];
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$key = $this->buildKey($url);
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// Try cache first
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if ($image = $this->cache->get($key)) {
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$image = json_decode($image, true);
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if (is_null($image)) {
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return null;
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}
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return [
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'contentType' => $image['contentType'],
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'data' => base64_decode($image['data'])
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];
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}
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// Fetch image from remote server
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$image = $this->fetchScreenshot($url);
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if (is_null($image)) {
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$json = json_encode(null);
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$this->cache->set($key, $json, self::CACHE_TTL);
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return null;
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}
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// Store in cache for next time
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$json = json_encode([
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'contentType' => $image['contentType'],
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'data' => base64_encode($image['data'])
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]);
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$this->cache->set($key, $json, self::CACHE_TTL);
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return $image;
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}
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public function fetchScreenshot($url) {
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try {
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$client = new \GuzzleHTTP\Client();
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$request = $client->post($this->apiUrl, ['body' => [
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'key' => $this->apiKey,
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'url' => $url,
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'width' => $this->width,
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'height' => $this->height
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]
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]);
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$body = $request->json();
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} catch (\GuzzleHttp\Exception\RequestException $e) {
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\OCP\Util::writeLog('bookmarks', $e, \OCP\Util::WARN);
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return null;
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} catch (\Exception $e) {
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throw $e;
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}
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\OCP\Util::writeLog('bookmarks', $body, \OCP\Util::WARN);
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// Some HTPP Error occured :/
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if (200 != $request->getStatusCode()) {
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return null;
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}
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return [
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'contentType' => 'image/jpeg',
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'data' => base64_decode($body['base64_raw'])
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];
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}
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}
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