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<?php
declare(strict_types=1);
namespace Http\Client\Common\Plugin;
use Http\Client\Common\Exception\ClientErrorException;
use Http\Client\Common\Exception\ServerErrorException;
use Http\Client\Common\Plugin;
use Http\Promise\Promise;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
/**
* Throw exception when the response of a request is not acceptable.
*
* Status codes 400-499 lead to a ClientErrorException, status 500-599 to a ServerErrorException.
*
* Warning
* =======
*
* Throwing an exception on a valid response violates the PSR-18 specification.
* This plugin is provided as a convenience when writing a small application.
* When providing a client to a third party library, this plugin must not be
* included, or the third party library will have problems with error handling.
*
* @author Joel Wurtz <joel.wurtz@gmail.com>
*/
final class ErrorPlugin implements Plugin
{
/**
* @var bool Whether this plugin should only throw 5XX Exceptions (default to false).
*
* If set to true 4XX Responses code will never throw an exception
*/
private $onlyServerException;
/**
* @param array $config {
*
* @var bool only_server_exception Whether this plugin should only throw 5XX Exceptions (default to false).
* }
*/
public function __construct(array $config = [])
{
$resolver = new OptionsResolver();
$resolver->setDefaults([
'only_server_exception' => false,
]);
$resolver->setAllowedTypes('only_server_exception', 'bool');
$options = $resolver->resolve($config);
$this->onlyServerException = $options['only_server_exception'];
}
/**
* {@inheritdoc}
*/
public function handleRequest(RequestInterface $request, callable $next, callable $first): Promise
{
$promise = $next($request);
return $promise->then(function (ResponseInterface $response) use ($request) {
return $this->transformResponseToException($request, $response);
});
}
/**
* Transform response to an error if possible.
*
* @param RequestInterface $request Request of the call
* @param ResponseInterface $response Response of the call
*
* @throws ClientErrorException If response status code is a 4xx
* @throws ServerErrorException If response status code is a 5xx
*
* @return ResponseInterface If status code is not in 4xx or 5xx return response
*/
private function transformResponseToException(RequestInterface $request, ResponseInterface $response): ResponseInterface
{
if (!$this->onlyServerException && $response->getStatusCode() >= 400 && $response->getStatusCode() < 500) {
throw new ClientErrorException($response->getReasonPhrase(), $request, $response);
}
if ($response->getStatusCode() >= 500 && $response->getStatusCode() < 600) {
throw new ServerErrorException($response->getReasonPhrase(), $request, $response);
}
return $response;
}
}