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<?php |
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namespace IntegerNet\CallbackProxy; |
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use GuzzleHttp\Client; |
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use GuzzleHttp\Exception\RequestException; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\UriInterface; |
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/** |
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* Dispatches a request to multiple targets, returns first successful response (HTTP 200) or last response if none are |
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* successful |
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*/ |
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class Dispatcher |
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{ |
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/** |
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* @var Client |
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*/ |
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private $client; |
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/** |
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* @var Target[] |
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*/ |
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private $targets; |
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public function __construct(Client $client, Target ...$targets) |
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{ |
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$this->client = $client; |
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$this->targets = $targets; |
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} |
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public function dispatch(RequestInterface $request, ResponseInterface $response, string $action): ResponseInterface |
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{ |
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$firstSuccessfulResponse = null; |
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foreach ($this->targets as $target) { |
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$response = $this->dispatchSingle($request, $target, $action); |
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if ($firstSuccessfulResponse === null && $this->responseIsSuccessful($response)) { |
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$firstSuccessfulResponse = $response; |
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} |
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} |
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return $firstSuccessfulResponse ?? $response; |
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} |
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private function dispatchSingle(RequestInterface $request, Target $target, string $action): ResponseInterface |
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{ |
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try { |
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$response = $this->client->send($target->applyToRequest($request, $action)); |
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return $target->applyToResponse($response, $action); |
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} catch (RequestException $e) { |
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if ($e->getResponse() instanceof ResponseInterface) { |
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return $target->applyToResponse($e->getResponse(), $action); |
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} |
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throw $e; |
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} |
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} |
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private function responseIsSuccessful(ResponseInterface $response): bool |
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{ |
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return $response->getStatusCode() >= 200 && $response->getStatusCode() < 300; |
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} |
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} |
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integer-net /
callback-proxy
