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<?php |
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/** |
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* @author Joas Schilling <[email protected]> |
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* @author Lukas Reschke <[email protected]> |
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* @author Thomas Müller <[email protected]> |
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* @author Vincent Petry <[email protected]> |
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* |
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* @copyright Copyright (c) 2018, ownCloud GmbH |
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* @license AGPL-3.0 |
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* |
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* This code 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, version 3, |
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* as published by the Free Software Foundation. |
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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, version 3, |
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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 OCA\FederatedFileSharing; |
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use GuzzleHttp\Exception\ClientException; |
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use GuzzleHttp\Exception\ConnectException; |
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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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/** |
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* Class DiscoveryManager handles the discovery of endpoints used by Federated |
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* Cloud Sharing. |
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* |
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* @package OCA\FederatedFileSharing |
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*/ |
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class DiscoveryManager { |
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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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/** @var bool */ |
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public $underTest = false; |
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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 $clientService) { |
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$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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* 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 $url |
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* @return bool |
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*/ |
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private function isSafeUrl($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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* Discover the actual data and do some naive caching to ensure that the data |
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* is not requested multiple times. |
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* |
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* If no valid discovery data is found the ownCloud defaults are returned. |
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* |
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* @param string $remote |
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* @return array |
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*/ |
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private function discover($remote) { |
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// Check if something is in the cache |
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if ($cacheData = $this->cache->get($remote)) { |
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return \json_decode($cacheData, true); |
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} |
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// Default response body |
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$discoveredServices = [ |
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'webdav' => '/public.php/webdav', |
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'share' => '/ocs/v1.php/cloud/shares', |
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]; |
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if (\defined('PHPUNIT_RUN') && !$this->underTest) { |
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return $discoveredServices; |
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} |
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$decodedService = $this->makeRequest($remote . '/ocs-provider/'); |
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if (!empty($decodedService)) { |
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$endpoints = [ |
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'webdav', |
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'share', |
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]; |
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foreach ($endpoints as $endpoint) { |
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if (isset($decodedService['services']['FEDERATED_SHARING']['endpoints'][$endpoint])) { |
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$endpointUrl = (string)$decodedService['services']['FEDERATED_SHARING']['endpoints'][$endpoint]; |
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if ($this->isSafeUrl($endpointUrl)) { |
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$discoveredServices[$endpoint] = $endpointUrl; |
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} |
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} |
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} |
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} |
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// Write into cache |
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$this->cache->set($remote, \json_encode($discoveredServices)); |
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return $discoveredServices; |
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} |
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/** |
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* Discover the actual data and do some naive caching to ensure that the data |
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* is not requested multiple times. |
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* |
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* If no valid discovery data is found the ownCloud defaults are returned. |
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* |
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* @param string $remote |
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* @return array |
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*/ |
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private function ocmDiscover($remote) { |
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// Check if something is in the cache |
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if ($cacheData = $this->cache->get('OCM' . $remote)) { |
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return \json_decode($cacheData, true); |
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} |
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// Default response body |
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$discoveredServices = [ |
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'webdav' => '/public.php/webdav', |
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'ocm' => '/index.php/apps/federatedfilesharing', |
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]; |
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if (\defined('PHPUNIT_RUN') && !$this->underTest) { |
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return $discoveredServices; |
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} |
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$decodedService = $this->makeRequest($remote . '/ocm-provider/'); |
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if (!empty($decodedService)) { |
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$discoveredServices['ocm'] = $decodedService['endPoint']; |
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$shareTypes = $discoveredServices['shareTypes']; |
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foreach ($shareTypes as $type) { |
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if ($type['name'] == 'file') { |
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$discoveredServices['webdav'] = $type['protocols']['webdav']; |
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} |
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} |
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} |
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// Write into cache |
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$this->cache->set('OCM' . $remote, \json_encode($discoveredServices)); |
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return $discoveredServices; |
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} |
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/** |
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* Send GET request and return decoded body of response on success |
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* |
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* @param $url |
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* |
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* @return array |
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*/ |
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private function makeRequest($url) { |
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$decodedService = []; |
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try { |
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// make timeout configurable? |
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$response = $this->client->get( |
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$url, |
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[ |
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'timeout' => 10, |
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'connect_timeout' => 10, |
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] |
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); |
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if ($response->getStatusCode() === 200) { |
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$decodedService = \json_decode($response->getBody(), true); |
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} |
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if (\is_array($decodedService) === false) { |
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$decodedService = []; |
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} |
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} catch (ClientException $e) { |
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// Don't throw any exception since exceptions are handled before |
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} catch (ConnectException $e) { |
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// Don't throw any exception since exceptions are handled before |
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} |
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return $decodedService; |
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} |
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/** |
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* Return the public WebDAV endpoint used by the specified remote |
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* |
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* @param string $host |
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* @return string |
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*/ |
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public function getWebDavEndpoint($host) { |
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return $this->discover($host)['webdav']; |
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} |
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/** |
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* Return the sharing endpoint used by the specified remote |
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* |
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* @param string $host |
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* @return string |
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*/ |
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public function getShareEndpoint($host) { |
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return $this->discover($host)['share']; |
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} |
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public function getOcmWebDavEndPoint($host) { |
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return $this->ocmDiscover($host)['webdav']; |
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} |
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public function getOcmShareEndPoint($host) { |
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return $this->ocmDiscover($host)['ocm']; |
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} |
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} |
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owncloud /
core
