Builder for stack middlewares based on HttpKernelInterface.
Stack/Builder is a small library that helps you construct a nested HttpKernelInterface decorator tree. It models it as a stack of middlewares.
If you want to decorate a silex app with session and cache middlewares, you'll have to do something like this:
use Symfony\Component\HttpKernel\HttpCache\Store; $app = new Silex\Application(); $app->get('/', function () { return 'Hello World!'; }); $app = new Stack\Session( new Symfony\Component\HttpKernel\HttpCache\HttpCache( $app, new Store(__DIR__.'/cache') ) );
This can get quite annoying indeed. Stack/Builder simplifies that:
$stack = (new Stack\Builder()) ->push('Stack\Session') ->push('Symfony\Component\HttpKernel\HttpCache\HttpCache', new Store(__DIR__.'/cache')); $app = $stack->resolve($app);
As you can see, by arranging the layers as a stack, they become a lot easier to work with.
In the front controller, you need to serve the request:
use Symfony\Component\HttpFoundation\Request; $request = Request::createFromGlobals(); $response = $app->handle($request)->send(); $app->terminate($request, $response);
Stack/Builder also supports pushing a callable on to the stack, for situations
where instantiating middlewares might be more complicated. The callable should
accept a HttpKernelInterface as the first argument and should also return a
HttpKernelInterface. The example above could be rewritten as:
$stack = (new Stack\Builder()) ->push('Stack\Session') ->push(function ($app) { $cache = new HttpCache($app, new Store(__DIR__.'/cache')); return $cache; }) ;