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<?php declare(strict_types=1);
namespace jschreuder\Middle\ServerMiddleware;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
final class JsonRequestParserMiddleware implements MiddlewareInterface
{
/** @param string[] $jsonContentTypes array of regexes to check against content-types */
public function __construct(
private readonly array $jsonContentTypes = ['#^application\/json(;|$)#iD']
) {}
public function process(ServerRequestInterface $request, RequestHandlerInterface $requestHandler): ResponseInterface
if ($this->isJsonRequest($request->getHeaderLine('Content-Type'))) {
$request = $request->withParsedBody($this->parseBody($request));
}
return $requestHandler->handle($request);
private function isJsonRequest(string $requestContentType) : bool
foreach ($this->jsonContentTypes as $jsonContentType) {
if (preg_match($jsonContentType, $requestContentType) > 0) {
return true;
return false;
private function parseBody(ServerRequestInterface $request) : array
$parsedBody = json_decode($request->getBody()->getContents(), true);
if (json_last_error() !== JSON_ERROR_NONE) {
throw new \InvalidArgumentException('Could not decode JSON body: ' . json_last_error_msg());
return $parsedBody;
jschreuder /
Middle
