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NegativeDnsCache.php 1.6 KB

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  1. <?php
  2. declare(strict_types=1);
  3. /**
  4. * @copyright Copyright (c) 2021, Lukas Reschke <lukas@statuscode.ch>
  5. *
  6. * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
  7. * @author Lukas Reschke <lukas@statuscode.ch>
  8. *
  9. * @license GNU AGPL version 3 or any later version
  10. *
  11. * This program is free software: you can redistribute it and/or modify
  12. * it under the terms of the GNU Affero General Public License as
  13. * published by the Free Software Foundation, either version 3 of the
  14. * License, or (at your option) any later version.
  15. *
  16. * This program is distributed in the hope that it will be useful,
  17. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19. * GNU Affero General Public License for more details.
  20. *
  21. * You should have received a copy of the GNU Affero General Public License
  22. * along with this program. If not, see <http://www.gnu.org/licenses/>.
  23. *
  24. */
  25. namespace OC\Http\Client;
  26. use OCP\ICache;
  27. use OCP\ICacheFactory;
  28. class NegativeDnsCache {
  29. /** @var ICache */
  30. private $cache;
  31. public function __construct(ICacheFactory $memcache) {
  32. $this->cache = $memcache->createLocal('NegativeDnsCache');
  33. }
  34. private function createCacheKey(string $domain, int $type) : string {
  35. return $domain . "-" . (string)$type;
  36. }
  37. public function setNegativeCacheForDnsType(string $domain, int $type, int $ttl) : void {
  38. $this->cache->set($this->createCacheKey($domain, $type), "true", $ttl);
  39. }
  40. public function isNegativeCached(string $domain, int $type) : bool {
  41. return (bool)$this->cache->hasKey($this->createCacheKey($domain, $type));
  42. }
  43. }