added Symfony2 ResponseListener registration

src/Silex/Application.php

@@ -19,6 +19,7 @@ use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
 use Symfony\Component\HttpKernel\Event\FilterControllerEvent;
 use Symfony\Component\HttpKernel\Event\FilterResponseEvent;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
+use Symfony\Component\HttpKernel\EventListener\ResponseListener;
 use Symfony\Component\HttpKernel\Exception\MethodNotAllowedHttpException;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
@@ -81,6 +82,7 @@ class Application extends \Pimple implements HttpKernelInterface, EventSubscribe
             if (isset($app['exception_handler'])) {
                 $dispatcher->addSubscriber($app['exception_handler']);
             }
+            $dispatcher->addListener(KernelEvents::RESPONSE, array(new ResponseListener($app['charset']), 'onKernelResponse'));
 
             return $dispatcher;
         });

tests/Silex/Tests/ApplicationTest.php

@@ -146,6 +146,25 @@ class ApplicationTest extends \PHPUnit_Framework_TestCase
 
         $this->assertEquals('Hello Fabien', $app->handle(Request::create('/Fabien'))->getContent());
     }
+
+    public function testHttpSpec()
+    {
+        $app = new Application();
+        $app['charset'] = 'ISO-8859-1';
+
+        $app->get('/', function () {
+            return 'hello';
+        });
+
+        // content is empty for HEAD requests
+        $response = $app->handle(Request::create('/', 'HEAD'));
+        $this->assertEquals('', $response->getContent());
+
+        // charset is appended to Content-Type
+        $response = $app->handle(Request::create('/'));
+        $response->prepare();
+        $this->assertEquals('text/html; charset=ISO-8859-1', $response->headers->get('Content-Type'));
+    }
 }
 
 class FooController