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<?php
declare(strict_types=1);
namespace Buzz\Middleware;
use Buzz\Exception\InvalidArgumentException;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
/**
* @author Tobias Nyholm <[email protected]>
*/
class CallbackMiddleware implements MiddlewareInterface
{
private $callable;
* The callback should expect either one or two arguments, depending on
* whether it is receiving a pre or post send notification.
*
* $middleware = new CallbackMiddleware(function($request, $response = null) {
* if ($response) {
* // postSend
* } else {
* // preSend
* }
* });
* @param mixed $callable A PHP callable
* @throws InvalidArgumentException If the argument is not callable
public function __construct($callable)
if (!\is_callable($callable)) {
throw new InvalidArgumentException('The argument is not callable.');
}
$this->callable = $callable;
public function handleRequest(RequestInterface $request, callable $next)
$request = \call_user_func($this->callable, $request);
return $next($request);
public function handleResponse(RequestInterface $request, ResponseInterface $response, callable $next)
$response = \call_user_func($this->callable, $request, $response);
return $next($request, $response);
kriswallsmith /
Buzz
