Middleware PHPWalter Dal Mut

@walterdalmut - github.com/wdalmut

About Middlewarefunction ($request, $response)

Something that does something with a Request and a Response

Thanks for listening

Why middleware is interesting?Service Oriented ArchitectureMicro Services

Something that we can change in couple of weeksetc. etc.

General principleWire components that interacts with the

request and the response$app = new MiddlewareRunner();$app­>add(new Versioning());$app­>add(new Router());$app­>add(new Authentication());$app­>add(new Options());$app­>add(new Authorization());$app­>add(new Accepts());$app­>add(new ContentType());$app­>add(new Parser());$app­>add(new Params());$app­>add(new Query());$app­>add(new Body());$app­>add(new Dispatcher());$app­>add(new ProblemHandler());$app­>run($request, $response);

A picture is worth a thousand words

from StackPHP

We need a goodimplementation for Request

and Response

Existing middleware frameworksStackPHPSlim Framework...

FrankieA Frankenstein framework

https://github.com/wdalmut/frankie

Different framework components

Frankie is my third frameworkSimple-MVC

Push & Pull MVC

UpCloo Web FrameworkEvent-Driven framework with ZF components

FrankieMiddleware with different framework components

https://github.com/wdalmut/simple-mvc

https://github.com/wdalmut/upcloo-web-framework

https://github.com/wdalmut/frankie

Componentsacclimate/containerdoctrine/annotationsdoctrine/cachedoctrine/commonmnapoli/php-disymfony/routingsymfony/http-foundationsymfony/config

IdeasMiddeware approachComposition (DiC)Readability (Annotations)Not event-driven (state-machine approach)TDD & Code Design

Middlewareclass MyController public function index(Request $request, Response $response, ...$params)

CompositionVia acclimate (mixing containers)

$sfContainer = new DicBuilder();$loader = new XmlFileLoader( $sfContainer, new FileLocator(realpath(__DIR__ . '/../')));$loader­>load(realpath(__DIR__ . '/../configs/services.xml'));$container­>addContainer($acclimate­>acclimate($sfContainer));//­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­$conf = include __DIR__ . '/../configs/services.php';$serviceManager = new ServiceManager();

$serviceManagerConfigurator = new ServiceManagerConfig($conf["services"]);$serviceManagerConfigurator­>configureServiceManager($serviceManager);

$serviceManager­>setService("Config", $conf);

$container­>addContainer($acclimate­>acclimate($serviceManager));

Symfony2 DiC and Zend Framework ServiceManager together

All is resolved byAcclimate/PHP-Di

class User /** * @Inject("orm") */ private $entityManager;

//...

Readability via annotations/** * @Route(name="/v1") */class User /** * @Route(name="/user/id", methods="GET") */ public function get(Request $request, Response $response, $id) //...

http://domain.tld/v1/user/12

State-MachineMiddle-out - Read the action in order to compose other steps

/** * @Route(name="/v1") * @Before(targetClass="One", targetMethod="one") * @After(targetClass="Two", targetMethod="two") * @After(targetClass="Five", targetMethod="five") */class User /** * @Route(name="/user/id", methods="GET") * @Before(targetClass="Three", targetMethod="three") * @After(targetClass="Four", targetMethod="four") */ public function get(Request $request, Response $response, $id)

State-Machine: (other objects can chain more steps)

One::one => Three::threeUser::getFour::four => Two::two => Five::five

Shortcuttingclass Auth public function basic(Request $request, Response $response) $auth = $request­>headers­>get("Authorization");

//...

if (!$isValid) $response­>setStatusCode(401); return $response;

Or more readable

return new ApiProblem(401, "Unauthorized"); //ApiProblem extends Response

Discover more on:https://github.com/wdalmut/frankiehttp://frankie.readthedocs.org/en/develop/https://github.com/wdalmut/frankie-apihttps://github.com/wdalmut/frankie-app

About PHP and Middlewarehttps://mwop.net/blog/2015-01-08-on-http-middleware-and-psr-

7.html

Check-out an example

Thanks for listening