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<?php |
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declare(strict_types=1); |
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/** |
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* @copyright Copyright (c) 2018 Arthur Schiwon <[email protected]> |
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* |
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* @author Arthur Schiwon <[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\Updater; |
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use OCP\AppFramework\Db\DoesNotExistException; |
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use OCP\Http\Client\IClientService; |
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use OCP\Http\Client\IResponse; |
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use OCP\ILogger; |
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class ChangesCheck { |
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/** @var IClientService */ |
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protected $clientService; |
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/** @var ChangesMapper */ |
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private $mapper; |
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/** @var ILogger */ |
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private $logger; |
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const RESPONSE_NO_CONTENT = 0; |
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const RESPONSE_USE_CACHE = 1; |
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const RESPONSE_HAS_CONTENT = 2; |
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public function __construct(IClientService $clientService, ChangesMapper $mapper, ILogger $logger) { |
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$this->clientService = $clientService; |
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$this->mapper = $mapper; |
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$this->logger = $logger; |
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} |
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/** |
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* @throws \Exception |
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*/ |
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public function check(string $uri, string $version): array { |
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try { |
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$version = $this->normalizeVersion($version); |
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$changesInfo = $this->mapper->getChanges($version); |
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if($changesInfo->getLastCheck() + 1800 > time()) { |
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return json_decode($changesInfo->getData(), true); |
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} |
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} catch (DoesNotExistException $e) { |
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$changesInfo = new ChangesResult(); |
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} |
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$response = $this->queryChangesServer($uri, $changesInfo); |
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switch($this->evaluateResponse($response)) { |
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case self::RESPONSE_NO_CONTENT: |
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return []; |
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case self::RESPONSE_USE_CACHE: |
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return json_decode($changesInfo->getData(), true); |
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case self::RESPONSE_HAS_CONTENT: |
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default: |
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$data = $this->extractData($response->getBody()); |
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$changesInfo->setData(json_encode($data)); |
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$changesInfo->setEtag($response->getHeader('Etag')); |
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$this->cacheResult($changesInfo, $version); |
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return $data; |
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} |
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} |
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protected function evaluateResponse(IResponse $response): int { |
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if($response->getStatusCode() === 304) { |
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return self::RESPONSE_USE_CACHE; |
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} else if($response->getStatusCode() === 404) { |
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return self::RESPONSE_NO_CONTENT; |
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} else if($response->getStatusCode() === 200) { |
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return self::RESPONSE_HAS_CONTENT; |
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} |
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$this->logger->debug('Unexpected return code {code} from changelog server', [ |
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'app' => 'core', |
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'code' => $response->getStatusCode(), |
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]); |
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return self::RESPONSE_NO_CONTENT; |
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} |
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protected function cacheResult(ChangesResult $entry, string $version) { |
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if($entry->getVersion() === $version) { |
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$this->mapper->update($entry); |
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} else { |
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$entry->setVersion($version); |
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$this->mapper->insert($entry); |
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} |
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} |
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/** |
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* @throws \Exception |
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*/ |
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protected function queryChangesServer(string $uri, ChangesResult $entry): IResponse { |
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$headers = []; |
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if($entry->getEtag() !== '') { |
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$headers['If-None-Match'] = [$entry->getEtag()]; |
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} |
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$entry->setLastCheck(time()); |
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$client = $this->clientService->newClient(); |
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return $client->get($uri, [ |
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'headers' => $headers, |
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]); |
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} |
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protected function extractData($body):array { |
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$data = []; |
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if ($body) { |
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$loadEntities = libxml_disable_entity_loader(true); |
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$xml = @simplexml_load_string($body); |
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libxml_disable_entity_loader($loadEntities); |
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if ($xml !== false) { |
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$data['changelogURL'] = (string)$xml->changelog['href']; |
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$data['whatsNew'] = []; |
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foreach($xml->whatsNew as $infoSet) { |
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$data['whatsNew'][(string)$infoSet['lang']] = [ |
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'regular' => (array)$infoSet->regular->item, |
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'admin' => (array)$infoSet->admin->item, |
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]; |
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} |
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} else { |
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libxml_clear_errors(); |
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} |
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} |
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return $data; |
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} |
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/** |
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* returns a x.y.z form of the provided version. Extra numbers will be |
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* omitted, missing ones added as zeros. |
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*/ |
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protected function normalizeVersion(string $version): string { |
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$versionNumbers = array_slice(explode('.', $version), 0, 3); |
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$versionNumbers[0] = $versionNumbers[0] ?: '0'; // deal with empty input |
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while(count($versionNumbers) < 3) { |
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// changelog server expects x.y.z, pad 0 if it is too short |
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$versionNumbers[] = 0; |
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} |
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return implode('.', $versionNumbers); |
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} |
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} |
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nextcloud /
server
