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<?php
namespace Jasny\ErrorHandler;
use Jasny\ErrorHandler;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\ResponseInterface;
use Jasny\HttpMessage\GlobalEnvironmentInterface;
/**
* Use error handler as middleware
*/
class Middleware
{
/**
* @var ErrorHandler
*/
protected $errorHandler;
/**
* Class constructor
*
* @param ErrorHandler $errorHandler
*/
public function __construct(ErrorHandler $errorHandler)
{
$this->errorHandler = $errorHandler;
}
/**
* Run middleware action
*
* @param ServerRequestInterface $request
* @param ResponseInterface $response
* @param callback $next
* @return ResponseInterface
*/
public function __invoke(ServerRequestInterface $request, ResponseInterface $response, $next)
{
if (!is_callable($next)) {
throw new \InvalidArgumentException("'next' should be a callback");
}
try {
$nextResponse = $next($request, $response);
$error = null;
} catch (\Error $e) {
$error = $e;
} catch (\Exception $e) {
$error = $e;
}
$this->errorHandler->setError($error);
if ($error) {
$this->errorHandler->log($error);
$nextResponse = $this->errorResponse($request, $response);
}
return $nextResponse;
}
/**
* Handle caught error
*
* @param ServerRequestInterface $request
* @param ResponseInterface $response
* @return ResponseInterface
*/
protected function errorResponse(ServerRequestInterface $request, ResponseInterface $response)
{
if (
interface_exists(GlobalEnvironmentInterface::class, false) &&
$response instanceof GlobalEnvironmentInterface &&
$response->isStale()
) {
$response = $response->revive();
}
$errorResponse = $response->withProtocolVersion($request->getProtocolVersion())->withStatus(500);
$errorResponse->getBody()->write('An unexpected error occured');
return $errorResponse;
}
}
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