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Updated documentation and fix code lint.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| <?php declare(strict_types=1); | ||
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| namespace NoGlitchYo\Dealdoh\Exception; | ||
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| use Exception; | ||
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| class HttpProxyException extends Exception | ||
| { | ||
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| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| <?php declare(strict_types=1); | ||
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| namespace NoGlitchYo\Dealdoh; | ||
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| use NoGlitchYo\Dealdoh\Exception\HttpProxyException; | ||
| use NoGlitchYo\Dealdoh\Factory\Dns\MessageFactoryInterface; | ||
| use NoGlitchYo\Dealdoh\Factory\DohHttpMessageFactoryInterface; | ||
| use NoGlitchYo\Dealdoh\Helper\Base64UrlCodecHelper; | ||
| use NoGlitchYo\Dealdoh\Service\DnsResolverInterface; | ||
| use Nyholm\Psr7\Response; | ||
| use Psr\Http\Message\ResponseInterface; | ||
| use Psr\Http\Message\ServerRequestInterface; | ||
| use Psr\Log\LoggerInterface; | ||
| use Psr\Log\NullLogger; | ||
| use Throwable; | ||
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| class HttpProxy | ||
| { | ||
| /** | ||
| * @var DnsResolverInterface | ||
| */ | ||
| private $dnsResolver; | ||
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| /** | ||
| * @var LoggerInterface | ||
| */ | ||
| private $logger; | ||
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| /** | ||
| * @var MessageFactoryInterface | ||
| */ | ||
| private $dnsMessageFactory; | ||
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| /** | ||
| * @var DohHttpMessageFactoryInterface | ||
| */ | ||
| private $dohHttpMessageFactory; | ||
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| public function __construct( | ||
| DnsResolverInterface $dnsResolver, | ||
| MessageFactoryInterface $dnsMessageFactory, | ||
| DohHttpMessageFactoryInterface $dohHttpMessageFactory, | ||
| LoggerInterface $logger = null | ||
| ) { | ||
| $this->dnsResolver = $dnsResolver; | ||
| $this->logger = $logger ?? new NullLogger(); | ||
| $this->dnsMessageFactory = $dnsMessageFactory; | ||
| $this->dohHttpMessageFactory = $dohHttpMessageFactory; | ||
| } | ||
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| /** | ||
| * @throws HttpProxyException | ||
| */ | ||
| public function forward(ServerRequestInterface $serverRequest): ResponseInterface | ||
| { | ||
| try { | ||
| switch ($serverRequest->getMethod()) { | ||
| case 'GET': | ||
| $dnsQuery = $serverRequest->getQueryParams()['dns'] ?? null; | ||
| if (!$dnsQuery) { | ||
| return new Response(400, [], 'Query parameter `dns` is mandatory.'); | ||
| } | ||
| $dnsWireMessage = Base64UrlCodecHelper::decode($dnsQuery); | ||
| break; | ||
| case 'POST': | ||
| $dnsWireMessage = (string)$serverRequest->getBody(); | ||
| break; | ||
| default: | ||
| return new Response(405); | ||
| } | ||
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| $dnsRequestMessage = $this->dnsMessageFactory->createMessageFromDnsWireMessage($dnsWireMessage); | ||
| } catch (Throwable $t) { | ||
| $this->logger->error( | ||
| sprintf('Failed to create DNS message: %s', $t->getMessage()), | ||
| [ | ||
| 'exception' => $t, | ||
| 'httpRequest' => $serverRequest | ||
| ] | ||
| ); | ||
| throw new HttpProxyException('DNS message creation failed.', 0, $t); | ||
| } | ||
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| try { | ||
| $dnsResource = $this->dnsResolver->resolve($dnsRequestMessage); | ||
| } catch (Throwable $t) { | ||
| $this->logger->error( | ||
| sprintf('Failed to resolve DNS query: %s', $t->getMessage()), | ||
| [ | ||
| 'exception' => $t, | ||
| 'dnsRequestMessage' => $dnsRequestMessage, | ||
| ] | ||
| ); | ||
| throw new HttpProxyException('Resolving DNS message failed.', 0, $t); | ||
| } | ||
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| $this->logger->info( | ||
| sprintf("Resolved DNS query with method %s", $serverRequest->getMethod()), | ||
| [ | ||
| 'dnsRequestMessage' => $dnsResource->getRequest(), | ||
| 'dnsResponseMessage' => $dnsResource->getResponse(), | ||
| ] | ||
| ); | ||
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| return $this->dohHttpMessageFactory->createResponseFromMessage($dnsResource->getResponse()); | ||
| } | ||
| } |
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