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<?php |
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namespace RemotelyLiving\PHPDNS\Resolvers; |
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use GuzzleHttp\Client; |
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use GuzzleHttp\ClientInterface; |
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use GuzzleHttp\Exception\RequestException; |
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use RemotelyLiving\PHPDNS\Entities\DNSRecord; |
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use RemotelyLiving\PHPDNS\Entities\DNSRecordCollection; |
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use RemotelyLiving\PHPDNS\Entities\Interfaces\DNSRecordInterface; |
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use RemotelyLiving\PHPDNS\Entities\DNSRecordType; |
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use RemotelyLiving\PHPDNS\Entities\Hostname; |
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use RemotelyLiving\PHPDNS\Mappers\GoogleDNS as GoogleDNSMapper; |
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use RemotelyLiving\PHPDNS\Resolvers\Exceptions\QueryFailure; |
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use Throwable; |
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use function http_build_query; |
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use function json_decode; |
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final class GoogleDNS extends ResolverAbstract |
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{ |
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protected const BASE_URI = 'https://dns.google.com'; |
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protected const DEFAULT_TIMEOUT = 5.0; |
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public const DEFAULT_OPTIONS = [ |
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'base_uri' => self::BASE_URI, |
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'strict' => true, |
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'allow_redirects' => false, |
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'connect_timeout' => self::DEFAULT_TIMEOUT, |
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'protocols' => ['https'], |
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'headers' => [ |
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'Accept' => 'application/json', |
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], |
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]; |
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private ClientInterface $http; |
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private GoogleDNSMapper $mapper; |
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/** |
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* @param array<string, mixed> $options |
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*/ |
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public function __construct( |
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ClientInterface $http = null, |
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GoogleDNSMapper $mapper = null, |
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private int $consensusAttempts = 3, |
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private array $options = self::DEFAULT_OPTIONS |
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) { |
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$this->http = $http ?? new Client(); |
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$this->mapper = $mapper ?? new GoogleDNSMapper(); |
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} |
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/** |
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* Google DNS has consistency issues so this tries a few times to get an answer |
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*/ |
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public function hasRecord(DNSRecordInterface $record): bool |
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{ |
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$attempts = 0; |
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do { |
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$hasRecord = $this->getRecords((string)$record->getHostname(), (string)$record->getType()) |
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->has($record); |
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++$attempts; |
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} while (!$hasRecord && $attempts < $this->consensusAttempts); |
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return $hasRecord; |
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} |
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protected function doQuery(Hostname $hostname, DNSRecordType $recordType): DNSRecordCollection |
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{ |
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$results = $this->doApiQuery(['name' => (string)$hostname, 'type' => (string)$recordType]); |
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return $this->mapResults($this->mapper, $results); |
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} |
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/** |
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* @throws \RemotelyLiving\PHPDNS\Resolvers\Exceptions\QueryFailure |
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*/ |
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private function doApiQuery(array $query = []): array |
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{ |
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try { |
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$response = $this->http->request('GET', '/resolve?' . http_build_query($query), $this->options); |
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} catch (Throwable $e) { |
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throw new QueryFailure("Unable to query GoogleDNS API", 0, $e); |
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} |
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$result = (array) json_decode((string)$response->getBody(), true); |
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if (isset($result['Answer'])) { |
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return $result['Answer']; |
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} |
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if (isset($result['Authority'])) { |
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return $result['Authority']; |
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} |
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return []; |
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} |
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} |
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remotelyliving /
php-dns
