Symfony2 meets Drupal 8

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meets http://www.flickr.com/photos/nimport_nawak/3404931191

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Drupal 8 meets Symfony Fabien Potencier @fabpot fabien@symfony.com Founder of Lead developer of Open-Source libraries Twig, Swiftmailer, Silex, Pirum, Sismo, Pimple, Goutte, ... Symfony founder and lead developer

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Drupal 8 meets Symfony Lukas Kahwe Smith @lsmith smith@pooteeweet.org Works for in Switzerland PHP 5.3 Release Manager Co-lead of PHPCR Symfony2 core contributor

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http://www.flickr.com/photos/dunechaser/160405823 Drupal 8 meets Symfony How many of you are PHP developers?

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Drupal 8 meets Symfony http://www.flickr.com/photos/dunechaser/142079357 How many of you are Symfony “aware”?

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Drupal 8 meets Symfony We are both “outsiders” We are both quite experienced PHP developers We have a rough understanding of the hook paradigm aka the Drupal way http://www.flickr.com/photos/pictureperfectpose/76138988

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Drupal 8 meets Symfony A sad realization It would take a long time for us to be productive in Drupal let alone work on the core And everything we learn along the way would only help us with Drupal

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Drupal 8 meets Symfony What others do Building on top of long established OO design patterns Leverage new PHP language features and performance improvements Share code!

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Drupal 8 meets Symfony So Drupal is wrong? No, the question is just if the benefits of doing things differently outweigh the disadvantages

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Drupal 8 meets Symfony Core brain drain “The complexity of the custom code that’s used and the non-standard architecture combines to create a barrier to entry for developers new to Drupal (both experienced and novice developers alike).” buytaert.net

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Drupal 8 meets Symfony What could be gained Facilitate the refactoring towards a “framework” core Focus Drupal dev resources on the CMS Easier integration with other applications Ensure that the Drupal developer pool continues to grow

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Drupal 8 meets Symfony A decision was made “While these changes may seem large, and some of them are, we believe that they will achieve the right balance between empowering Drupal's design and architecture, and moving toward more modern, standard, well-tested code and techniques to empower a new generation of developers.” buytaert.net

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Drupal 8 meets Symfony How to collaborate? Symfony2 is MIT licensed which is GPL compatible Symfony2 development is very transparently managed on github.com We want to ensure Symfony2 works for Drupal, phpBB, etc.

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Drupal 8 meets Symfony For example ... Symfony2.0 provides a concept called “flash messages” to pass messages to the very next request drupal_set_message() could be replaced by this if we make it a bit more flexible Drak, lead of the Zikula CMS, created a PR to address exactly these concerns

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Drupal 8 meets Symfony What is Symfony? http://www.flickr.com/photos/apranihita/141159146/

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Drupal 8 meets Symfony http://www.flickr.com/photos/bigpinkcookie/22716359

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Drupal 8 meets Symfony is... ... a reusable set of standalone, decoupled, and cohesive PHP components that solve common web development problems http://www.flickr.com/photos/krislitman/493626935

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Drupal 8 meets Symfony is... ... an Object-Oriented set of classes ... compatible with PHP 5.3 and later http://www.flickr.com/photos/krislitman/493626935

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Drupal 8 meets Symfony DependencyInjection EventDispatcher HttpFoundation DomCrawler ClassLoader CssSelector HttpKernel BrowserKit Templating Translation Filesystem Serializer Validator Security Routing Console Process Config Finder Locale Yaml Form

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Drupal 8 meets Symfony is... ... a full-stack web framework http://www.flickr.com/photos/krislitman/493626935

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Drupal 8 meets Symfony Official website http://symfony.com/ Official repository https://github.com/symfony/symfony http://www.flickr.com/photos/28634332@N05/5654415647

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Drupal 8 meets Symfony Official website http://symfony.com/components Official repositories https://github.com/symfony/XXXX Components http://www.flickr.com/photos/28634332@N05/5654415647

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Drupal 8 meets Symfony Mailing-list https://groups.google.com/group/symfony2 IRC channel irc://irc.freenode.net/symfony http://www.flickr.com/photos/28634332@N05/5654415647

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Drupal 8 meets Symfony Which Open-Source projects are already using the Symfony Components? http://www.flickr.com/photos/maistora/3014414972

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Drupal 8 meets Symfony Behat - a BDD framework Console, DependencyInjection, EventDispatcher, Finder, Yaml, Config, Translation Doctrine - an object relational mapper Console, Yaml Propel - an object relational mapper Console, ClassLoader, Yaml PHPUnit - a PHP unit testing framework Yaml, (Finder soon?) Jackalope - a content repository (JCR 170/283) ClassLoader, Console Developer Tools http://www.flickr.com/photos/c_r_i_s/77763712

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Drupal 8 meets Symfony Silex - a micro-framework BrowerKit, CssSelector, DomCrawler, EventDispatcher, HttpFoundation, HttpKernel, Routing, Form, Translation, Validator PPI 2 - a framework ClassLoader, HttpFoundation, Routing, Templating Frameworks http://www.flickr.com/photos/c_r_i_s/77763712

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Drupal 8 meets Symfony easybook - a book publishing platform ClassLoader, Console, EventDispatcher, Filesystem, Finder, Yaml Midgard CMS - a content management framework uses the full-stack framework Zikula - ex PostNuke - an application framework HttpFoundation, HttpKernel, EventDispatcher, ClassLoader, DependencyInjection phpBB - a bulletin board software EventDispatcher, and most of them for version 4? Products http://www.flickr.com/photos/c_r_i_s/77763712

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Drupal 8 meets Symfony What about Drupal 8? http://www.flickr.com/photos/aloshbennett/619307160

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Drupal 8 meets Symfony Using the Symfony Components http://www.flickr.com/photos/35168673@N03/6086229920

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Drupal 8 meets Symfony $ git clone https://github.com/symfony/Console.git $ git co v2.0.9 $ git co 2.0 $ git co master Git

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Drupal 8 meets Symfony $ curl -O https://github.com/symfony/Console/zipball/v2.0.9 $ curl -O https://github.com/symfony/Console/zipball/2.0 $ curl -O https://github.com/symfony/Console/zipball/master Archives

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Drupal 8 meets Symfony $ pear channel-discover pear.symfony.com $ pear install symfony2/Console-2.0.9 PEAR

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Drupal 8 meets Symfony composer.json { "require": { "symfony/console": "2.1.*", "symfony/http-foundation": "v2.0.9" } } curl -s http://getcomposer.org/installer | php php composer.phar install Composer

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Drupal 8 meets Symfony Symfony Components comes with Drupal 8

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Drupal 8 meets Symfony ClassLoader

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Drupal 8 meets Symfony http://symfony.com/PSR0

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Drupal 8 meets Symfony require_once __DIR__.'/src/Symfony/Component/ ClassLoader/UniversalClassLoader.php'; use Symfony\Component\ClassLoader\UniversalClassLoader; $loader = new UniversalClassLoader(); $loader->registerNamespaces(array( 'Symfony' => __DIR__.'/vendor/symfony/src', )); $loader->register();

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$loader->registerPrefixes(array( 'Twig_' => __DIR__.'/vendor/twig/lib', )); Drupal 8 meets Symfony

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Drupal 8 meets Symfony The Symfony ClassLoader Component loads your project classes automatically if they follow some standard conventions http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony HttpFoundation

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Drupal 8 meets Symfony http://www.flickr.com/photos/deniscollette/6741424757 HTTP HTTP/1.1 RFC 2616 http://www.ietf.org/rfc/rfc2616.txt http://tools.ietf.org/wg/httpbis/

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Drupal 8 meets Symfony The Web in action The User asks for a Resource in a Browser http://example.com/foo.html

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Drupal 8 meets Symfony The Web in action The User asks for a Resource in a Browser The Browser sends a Request to the Server GET /foo.html HTTP/1.1 Host: example.com

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Drupal 8 meets Symfony The Web in action The User asks for a Resource in a Browser The Browser sends a Request to the Server The Server sends back a Response to the Browser HTTP/1.1 200 OK Date: Wed, 15 Oct 2005 07:07:07 GMT Content-Length: 14 Content-Type: text/html Hello World!

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Drupal 8 meets Symfony The Web in action The User asks for a Resource in a Browser The Browser sends a Request to the Server The Server sends back a Response to the Browser The Browser displays the Resource to the User

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Drupal 8 meets Symfony Internet Client Server The Client sends a Request to the Server The Server sends back a Response to the Client Request GET /foo.html HTTP/1.1 Host: example.com Response HTTP/1.1 200 OK Date: Wed, 15 Oct 2005 07:07:07 GMT Content-Length: 14 Content-Type: text/html Hello World!

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Drupal 8 meets Symfony Request GET /foo.html HTTP/1.1 Host: example.com http://www.flickr.com/photos/splorp/64027565

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session_start(); $name = $_GET['name']; // $_POST, $_FILE, $_COOKIE, ... echo $_SESSION['name']; $method = $_SERVER['REQUEST_METHOD']; Drupal 8 meets Symfony Request GET /foo.html HTTP/1.1 Host: example.com

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Drupal 8 meets Symfony $clientIp = $_SERVER['REMOTE_ADDR']; Request GET /foo.html HTTP/1.1 Host: example.com

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Drupal 8 meets Symfony if (isset($_SERVER['HTTP_CLIENT_IP'])) { return $_SERVER['HTTP_CLIENT_IP']; } if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ips = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR'], 2); return isset($ips[0]) ? trim($ips[0]) : ''; } return $_SERVER['REMOTE_ADDR']; Request GET /foo.html HTTP/1.1 Host: example.com

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Drupal 8 meets Symfony if ($trustProxy) { if (isset($_SERVER['HTTP_CLIENT_IP'])) { return $_SERVER['HTTP_CLIENT_IP']; } if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ips = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR'], 2); return isset($ips[0]) ? trim($ips[0]) : ''; } } return $_SERVER['REMOTE_ADDR']; Request GET /foo.html HTTP/1.1 Host: example.com

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Drupal 8 meets Symfony http://www.flickr.com/photos/viamoi/3338093351 Not Object-Oriented Low-level abstraction only “Singleton” like Not Object-Oriented Request GET /foo.html HTTP/1.1 Host: example.com

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Drupal 8 meets Symfony use Symfony\Component\HttpFoundation\Request; $request = Request::createFromGlobals(); $request = Request::create('/hello.html', 'GET'); $request->overrideGlobals(); Request GET /foo.html HTTP/1.1 Host: example.com

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Drupal 8 meets Symfony $request->query->get('name', 'Default'); $request->getSession()->get('name'); $request->getPathInfo(); $request->getClientIp(); Request::trustProxyData(); Request GET /foo.html HTTP/1.1 Host: example.com

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Drupal 8 meets Symfony Response HTTP/1.1 200 OK Date: Wed, 15 Oct 2005 07:07:07 GMT Content-Length: 14 Content-Type: text/html Hello World! http://www.flickr.com/photos/splorp/64027565

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Drupal 8 meets Symfony Response HTTP/1.1 200 OK Date: Wed, 15 Oct 2005 07:07:07 GMT Content-Length: 14 Content-Type: text/html Hello World! header('HTTP/1.0 404 Not Found'); header('Content-Type: text/html; charset=UTF-8'); setcookie('name', $name); $_SESSION['name'] = 'Fabien'; echo 'Hello '.$name;

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Drupal 8 meets Symfony http://www.flickr.com/photos/viamoi/3338093351 Low-level abstraction only “Singleton” like Does not play well with the CLI Not Object-Oriented Response HTTP/1.1 200 OK Date: Wed, 15 Oct 2005 07:07:07 GMT Content-Length: 14 Content-Type: text/html Hello World!

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Drupal 8 meets Symfony use Symfony\Component\HttpFoundation\Response; $response = new Response('Not Found', 404, array('Content-Type' => 'text/plain')); $response = new Response(); $response->setContent('Hello World'); $response->send(); Response HTTP/1.1 200 OK Date: Wed, 15 Oct 2005 07:07:07 GMT Content-Length: 14 Content-Type: text/html Hello World!

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Drupal 8 meets Symfony use Symfony\Component\HttpFoundation\StreamedResponse; $response = new StreamedResponse(function () { echo 'foo'; flush(); echo 'bar'; }); $response->send(); Response HTTP/1.1 200 OK Date: Wed, 15 Oct 2005 07:07:07 GMT Content-Length: 14 Content-Type: text/html Hello World!

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Drupal 8 meets Symfony $headers = $response->headers; $headers->set( 'Content-Disposition', $headers->makeDisposition( ResponseHeaderBag::DISPOSITION_ATTACHMENT, 'foo.pdf') ); Response HTTP/1.1 200 OK Date: Wed, 15 Oct 2005 07:07:07 GMT Content-Length: 14 Content-Type: text/html Hello World!

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Drupal 8 meets Symfony $response->prepare($request); Response HTTP/1.1 200 OK Date: Wed, 15 Oct 2005 07:07:07 GMT Content-Length: 14 Content-Type: text/html Hello World!

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Drupal 8 meets Symfony Session Management http://www.flickr.com/photos/tomvu/5371659662

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Drupal 8 meets Symfony The Symfony HttpFoundation Component defines a feature-full object-oriented layer for the HTTP messages http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony It replaces PHP native global variables and functions to allow writing better, more secure, and more testable code http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony Routing

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Drupal 8 meets Symfony use Symfony\Component\Routing\Route; $route = new Route('/node/{id}', array( '_controller' => 'SomeClass::someMethod' )); use Symfony\Component\Routing\RouteCollection; $routes = new RouteCollection(); $routes->add('node', $route);

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Drupal 8 meets Symfony use Symfony\Component\Routing\RequestContext; use Symfony\Component\Routing\Matcher\UrlMatcher; $matcher = new UrlMatcher($routes, new RequestContext()); $attributes = $matcher->match('/node/12'); $attributes = $matcher->match($request->getPathInfo()); print_r($attributes); array( '_route' => 'node', 'id' => 12, '_controller' => 'SomeClass::someMethod', );

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Drupal 8 meets Symfony use Symfony\Component\Routing\Generator\UrlGenerator; $generator = new UrlGenerator($routes, $context); echo $generator->generate('node', array('id' => 12));

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Drupal 8 meets Symfony The Symfony Routing Component decouples the look of URLs from the code that handle them http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony EventDispatcher

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Drupal 8 meets Symfony use Symfony\Component\EventDispatcher\EventDispatcher; $dispatcher = new EventDispatcher(); $callable = function (Event $event) { // do something }; $dispatcher->addListener('event_name', $callable); $dispatcher->dispatch('event_name', new Event());

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Drupal 8 meets Symfony The Symfony EventDispatcher Component implements a lightweight version of the Observer design pattern http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony HttpKernel

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Drupal 8 meets Symfony Request Response HTTP/1.1 200 OK Date: Wed, 15 Oct 2005 07:07:07 GMT Content-Length: 14 Content-Type: text/html Hello World! GET /foo.html HTTP/1.1 Host: example.com http://www.flickr.com/photos/-bast-/349497988

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Drupal 8 meets Symfony The web in action The User asks for a Resource in a Browser The Browser sends a Request to the Server Symfony gives the Developer a Request Object The Developer “converts” the Request Object to a Response Object The Server sends back a Response to the Browser The Browser displays the Resource to the User

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Drupal 8 meets Symfony namespace Symfony\Component\HttpKernel; interface HttpKernelInterface { /** * @return Response A Response instance */ function handle(Request $request, $type = self::MASTER_REQUEST, $catch = true); }

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Drupal 8 meets Symfony Request Response response Call Controller response? expection Sub-Request terminate controller view resolve controller resolve arguments request exception “sub-response” content Workflow

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Drupal 8 meets Symfony namespace Symfony\Component\HttpKernel\Controller; interface ControllerResolverInterface { function getController(Request $request); function getArguments(Request $request, $controller); }

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Drupal 8 meets Symfony $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(); $matcher = new UrlMatcher($routes, new RequestContext()); $dispatcher = new EventDispatcher(); $dispatcher->addSubscriber(new RouterListener($matcher)); $resolver = new ControllerResolver(); $kernel = new HttpKernel($dispatcher, $resolver); $kernel->handle($request)->send();

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Drupal 8 meets Symfony Symfony built-in listeners http://www.flickr.com/photos/c_r_i_s/67306260

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Drupal 8 meets Symfony $handler = function ($exception) { return new Response($exception->getMessage(), 500); }); $dispatcher->addSubscriber(new ExceptionListener($handler));

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Drupal 8 meets Symfony $handler = function ($exception) { $handler = new ExceptionHandler(); return $handler->createResponse($exception); }); $dispatcher->addSubscriber(new ExceptionListener($handler));

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Drupal 8 meets Symfony

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Drupal 8 meets Symfony The default HttpKernel implementation makes Drupal interoperable with any other software using the same http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony http://www.flickr.com/photos/cmogle/2947179118 HTTP Testing

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Drupal 8 meets Symfony use Symfony\Component\HttpKernel\Client; $client = new Client($kernel); $client->request('GET', '/hello/Fabien'); $response = $client->getResponse(); $this->assertEquals(200, $response->getStatusCode());

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Drupal 8 meets Symfony use Symfony\Component\HttpKernel\Client; $client = new Client($kernel); $crawler = $client->request('GET', '/hello/Fabien'); $nodes = $crawler->filter('h1:contains("Fabien")'); $this->assertCount(1, $nodes);

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http://www.flickr.com/photos/laserstars/908946494 Drupal 8 meets Symfony HTTP Caching

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Expiration Cache-Control Expires

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Validation Last-Modified If-Modified-Since ETag If-None-Match

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Drupal 8 meets Symfony $response->setTtl(10); $response->setClientTtl(10);

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Drupal 8 meets Symfony // get the last modified date as fast as you can $lastModified = ...; $response = new Response(); $response->setLastModified($lastModified); if ($response->isNotModified($request)) { return $response; } // do the expensive work $response->setContent(...); return $response;

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Drupal 8 meets Symfony Expiration wins over Validation http://www.flickr.com/photos/hoyvinmayvin/4672922637

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Drupal 8 meets Symfony $kernel = new HttpKernel($dispatcher, $resolver); $kernel = new HttpCache($kernel, new Store($cacheDir));

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Drupal 8 meets Symfony Varnish The HTTP accelerator Varnish The HTTP accelerator http://www.flickr.com/photos/stuckincustoms/3232133635

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Drupal 8 meets Symfony Using the default HttpKernel allows Drupal to benefit from the many built-in features http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony Edge Side Includes ESI http://www.w3.org/TR/esi-lang h"p://www.ﬂickr.com/photos/bored-‐now/2264811719

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Drupal 8 meets Symfony

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Drupal 8 meets Symfony

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Drupal 8 meets Symfony HTTP Validation

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Drupal 8 meets Symfony HTTP Expiration HTTP Validation

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Drupal 8 meets Symfony

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Drupal 8 meets Symfony HTTP Expiration

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Reverse Proxy Cache Browser Your PHP application GET /foo HTTP/1.1 Host: foo.org GET /foo HTTP/1.1 Host: foo.org GET /bar HTTP/1.1 Host: foo.org Lorem ipsum dolor HTTP/1.1 200 OK C-C: s-maxage=600 Lorem ipsum dolor HTTP/1.1 200 OK C-C: s-maxage=5 Lorem ipsum dolor sit amet, Lorem ipsum dolor HTTP/1.1 200 OK GET /foo C-C: s-maxage=600 Lor GET /bar C-C: s-maxage=5 Lorem

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Reverse Proxy Cache Your PHP application GET /foo HTTP/1.1 Host: foo.org Lorem ipsum dolor sit amet, Lorem ipsum dolor HTTP/1.1 200 OK GET /foo C-C: s-maxage=600 Lor GET /bar C-C: s-maxage=5 Lorem before exp. Browser

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Reverse Proxy Cache Your PHP application GET /foo HTTP/1.1 Host: foo.org GET /bar HTTP/1.1 Host: foo.org Lorem ipsum dolor HTTP/1.1 200 OK C-C: s-maxage=5 Lorem ipsum dolor sit amet, Lorem ipsum dolor HTTP/1.1 200 OK GET /foo C-C: s-maxage=600 Lor GET /bar C-C: s-maxage=5 Lorem after exp. Browser

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Drupal 8 meets Symfony $kernel = new HttpCache( $kernel, new Store($cacheDir), new Esi() );

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Drupal 8 meets Symfony http://www.flickr.com/photos/stuckincustoms/3232133635 Varnish The HTTP accelerator Varnish The HTTP accelerator

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Drupal 8 meets Symfony The Symfony HttpKernel Component provides the building blocks to create flexible, extensible, and scalable HTTP-based frameworks http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony The Symfony HttpKernel Component leverages the HTTP specification to make integration between projects easy http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony Silex https://github.com/fabpot/Silex http://silex.sensiolabs.org/ http://www.flickr.com/photos/linhngan/2715287035

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Drupal 8 meets Symfony http://fabien.potencier.org/build-a-framework Build your own framework http://www.flickr.com/photos/linhngan/2715287035

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Drupal 8 meets Symfony http://live.symfony.com/

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Drupal 8 meets Symfony The Symfony Components provides the low-level building blocks that you need to build a web product so that YOU can focus on what matters most for Drupal http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony http://www.flickr.com/photos/stevendepolo/4582437563 @fabpot @lsmith