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<?php |
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/** |
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* @copyright Copyright (c) 2017 Bjoern Schiessle <[email protected]> |
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* |
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* @license GNU AGPL version 3 or any later version |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License as |
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* published by the Free Software Foundation, either version 3 of the |
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* License, or (at your option) any later version. |
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* |
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* This program 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 License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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*/ |
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namespace OC\OCS; |
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use OCP\AppFramework\Http; |
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use OCP\Http\Client\IClient; |
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use OCP\Http\Client\IClientService; |
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use OCP\ICache; |
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use OCP\ICacheFactory; |
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use OCP\OCS\IDiscoveryService; |
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class DiscoveryService implements IDiscoveryService { |
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/** @var ICache */ |
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private $cache; |
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/** @var IClient */ |
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private $client; |
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/** |
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* @param ICacheFactory $cacheFactory |
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* @param IClientService $clientService |
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*/ |
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public function __construct(ICacheFactory $cacheFactory, |
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IClientService $clientService |
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) { |
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$this->cache = $cacheFactory->create('ocs-discovery'); |
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$this->client = $clientService->newClient(); |
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} |
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/** |
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* Discover OCS end-points |
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* |
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* If no valid discovery data is found the defaults are returned |
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* |
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* @param string $remote |
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* @param string $service the service you want to discover |
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* @return array |
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*/ |
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public function discover($remote, $service) { |
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// Check the cache first |
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$cacheData = $this->cache->get($remote . '#' . $service); |
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if($cacheData) { |
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return json_decode($cacheData, true); |
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} |
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$discoveredServices = []; |
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// query the remote server for available services |
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try { |
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$response = $this->client->get($remote . '/ocs-provider/', [ |
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'timeout' => 10, |
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'connect_timeout' => 10, |
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]); |
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if($response->getStatusCode() === Http::STATUS_OK) { |
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$decodedServices = json_decode($response->getBody(), true); |
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$discoveredServices = $this->getEndpoints($decodedServices, $service); |
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} |
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} catch (\Exception $e) { |
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// if we couldn't discover the service or any end-points we return a empty array |
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return []; |
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} |
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// Write into cache |
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$this->cache->set($remote . '#' . $service, json_encode($discoveredServices)); |
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return $discoveredServices; |
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} |
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/** |
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* get requested end-points from the requested service |
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* |
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* @param $decodedServices |
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* @param $service |
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* @return array |
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*/ |
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protected function getEndpoints($decodedServices, $service) { |
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$discoveredServices = []; |
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if(is_array($decodedServices) && |
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isset($decodedServices['services'][$service]['endpoints']) |
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) { |
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foreach ($decodedServices['services'][$service]['endpoints'] as $endpoint => $url) { |
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if($this->isSafeUrl($url)) { |
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$discoveredServices[$endpoint] = $url; |
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} |
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} |
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} |
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return $discoveredServices; |
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} |
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/** |
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* Returns whether the specified URL includes only safe characters, if not |
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* returns false |
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* |
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* @param string $url |
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* @return bool |
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*/ |
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protected function isSafeUrl($url) { |
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return (bool)preg_match('/^[\/\.\-A-Za-z0-9]+$/', $url); |
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} |
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} |
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nextcloud /
server
