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:whale: A PSR15 middleware dispatcher

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# Middleware Dispatcher

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The package is a flexible PSR-15 middleware dispatcher for PSR-7 request message that help to create middlewares and dispatch.

## Installation

Install via composer

```bash
composer require slince/middleware
```

## Quick example

```php
$dispatcher = new Slince\Middleware\Dispatcher([$middleware1, $middleware2]);

$response = $dispatcher->process(Zend\Diactoros\ServerRequestFactory::fromGlobals());

var_dump($response instanceof Psr\Http\Message\ResponseInterface);
```

## Usage

### Add middleware

Add PSR-15 middlewares to the queue

```php
use Psr\Http\Message\ServerRequestInterface;
use Interop\Http\Server\MiddlewareInterface;
use Interop\Http\Server\RequestHandlerInterface;
use Zend\Diactoros\Response;

class MyMiddleware implements MiddlewareInteface
{
    public function process(ServerRequestInterface $request, RequestHandlerInterface $next) 
    {
        $response = new Response();
        $response->getBody()->write('hello world');
        return $response;
    }
}
$dispatcher = new Slince\Middleware\Dispatcher([
    new MyMiddleware()
]);
```
Or add a callable function directly

```php
$dispatcher->push(function(ServerRequestInterface $request, RequestHandlerInterface $next){
    return $delegate->process($request);
});
```

### Dispatch

```php
try {
    $response = $dispatcher->process(Zend\Diactoros\ServerRequestFactory::fromGlobals());
} catch (Slince\Middleware\Exception\MissingResponseException $exception) {
    //...
}
```

A `MissingResponseException` will be thrown if the middleware did not return a invalid response or the queue was exhausted

## License
 
The MIT license. See [MIT](https://opensource.org/licenses/MIT)

middleware

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