c72e471c65
HttpContentRenderer has been renamed to FragmentHandler. The RendererStrategy subnamespace has been renamed to Fragment. The strategy classes now have Fragment in their names. ProxyRouterListener has been renamed to FragmentListener The router_proxy configuration entry has been renamed to fragments. |
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.. | ||
Bundle | ||
CacheClearer | ||
CacheWarmer | ||
Config | ||
Controller | ||
DataCollector | ||
Debug | ||
DependencyInjection | ||
Event | ||
EventListener | ||
Exception | ||
Fragment | ||
HttpCache | ||
Log | ||
Profiler | ||
Tests | ||
.gitignore | ||
CHANGELOG.md | ||
Client.php | ||
composer.json | ||
HttpKernel.php | ||
HttpKernelInterface.php | ||
Kernel.php | ||
KernelEvents.php | ||
KernelInterface.php | ||
LICENSE | ||
phpunit.xml.dist | ||
README.md | ||
TerminableInterface.php | ||
UriSigner.php |
HttpKernel Component
HttpKernel provides the building blocks to create flexible and fast HTTP-based frameworks.
HttpKernelInterface
is the core interface of the Symfony2 full-stack
framework:
interface HttpKernelInterface
{
/**
* Handles a Request to convert it to a Response.
*
* @param Request $request A Request instance
*
* @return Response A Response instance
*/
function handle(Request $request, $type = self::MASTER_REQUEST, $catch = true);
}
It takes a Request
as an input and should return a Response
as an
output. Using this interface makes your code compatible with all frameworks
using the Symfony2 components. And this will give you many cool features for
free.
Creating a framework based on the Symfony2 components is really easy. Here is a very simple, but fully-featured framework based on the Symfony2 components:
$routes = new RouteCollection();
$routes->add('hello', new Route('/hello', array('_controller' =>
function (Request $request) {
return new Response(sprintf("Hello %s", $request->get('name')));
}
)));
$request = Request::createFromGlobals();
$context = new RequestContext();
$context->fromRequest($request);
$matcher = new UrlMatcher($routes, $context);
$dispatcher = new EventDispatcher();
$dispatcher->addSubscriber(new RouterListener($matcher));
$resolver = new ControllerResolver();
$kernel = new HttpKernel($dispatcher, $resolver);
$kernel->handle($request)->send();
This is all you need to create a flexible framework with the Symfony2 components.
Want to add an HTTP reverse proxy and benefit from HTTP caching and Edge Side Includes?
$kernel = new HttpKernel($dispatcher, $resolver);
$kernel = new HttpCache($kernel, new Store(__DIR__.'/cache'));
Want to functional test this small framework?
$client = new Client($kernel);
$crawler = $client->request('GET', '/hello/Fabien');
$this->assertEquals('Fabien', $crawler->filter('p > span')->text());
Want nice error pages instead of ugly PHP exceptions?
$dispatcher->addSubscriber(new ExceptionListener(function (Request $request) {
$msg = 'Something went wrong! ('.$request->get('exception')->getMessage().')';
return new Response($msg, 500);
}));
And that's why the simple looking HttpKernelInterface
is so powerful. It
gives you access to a lot of cool features, ready to be used out of the box,
with no efforts.
Resources
You can run the unit tests with the following command:
$ cd path/to/Symfony/Component/HttpKernel/
$ composer.phar install --dev
$ phpunit