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![<?php ! $name = $_GET['name']; echo "Hello $name!";](https://image.slidesharecdn.com/uwm8xqhatx2i8oto611x-140628042601-phpapp01/75/Forget-about-index-php-and-build-you-applications-around-HTTP-6-2048.jpg)
![[METH] [REQUEST-‐URI] HTTP/[VER] [Field1]: [Value1] [Field2]: [Value2] ! [request body, if any] HTTP/[VER] [CODE] [TEXT] [Field1]: [Value1] [Field2]: [Value2] ! [response body] ResponseRequest](https://image.slidesharecdn.com/uwm8xqhatx2i8oto611x-140628042601-phpapp01/75/Forget-about-index-php-and-build-you-applications-around-HTTP-30-2048.jpg)
![$name = isset($_GET['name']) ? $_GET['name'] : "World"; $name = $request -‐>query -‐>get('name', 'World');](https://image.slidesharecdn.com/uwm8xqhatx2i8oto611x-140628042601-phpapp01/75/Forget-about-index-php-and-build-you-applications-around-HTTP-40-2048.jpg)
![$request = Request::create( '/', 'GET', ['name' => 'Kacper'] ); Simulate a Request](https://image.slidesharecdn.com/uwm8xqhatx2i8oto611x-140628042601-phpapp01/75/Forget-about-index-php-and-build-you-applications-around-HTTP-43-2048.jpg)
![$response = new Response( ‘Hello Kacper!’, Response::HTTP_OK, ['content-‐type' => 'text/html'] ); ! $response-‐>prepare($request); $response-‐>send();](https://image.slidesharecdn.com/uwm8xqhatx2i8oto611x-140628042601-phpapp01/75/Forget-about-index-php-and-build-you-applications-around-HTTP-45-2048.jpg)
![$response = new JsonResponse(); $response-‐>setData(['name' => 'Kacper']); JSON Response](https://image.slidesharecdn.com/uwm8xqhatx2i8oto611x-140628042601-phpapp01/75/Forget-about-index-php-and-build-you-applications-around-HTTP-47-2048.jpg)
![$route = new Route('/', array('controller' => 'HelloController')); $routes = new RouteCollection(); $routes-‐>add('hello_route', $route); ! $context = new RequestContext(); $context-‐>fromRequest($request); ! $matcher = new UrlMatcher($routes, $context); ! $parameters = $matcher-‐>match('/'); // ['controller' => 'HelloController', '_route' => 'hello_route']](https://image.slidesharecdn.com/uwm8xqhatx2i8oto611x-140628042601-phpapp01/75/Forget-about-index-php-and-build-you-applications-around-HTTP-76-2048.jpg)
![$route = new Route('/', array('controller' => 'HelloController')); $routes = new RouteCollection(); $routes-‐>add('hello_route', $route); ! $context = new RequestContext(); $context-‐>fromRequest($request); ! $matcher = new UrlMatcher($routes, $context); ! $parameters = $matcher-‐>match('/'); // ['controller' => 'HelloController', '_route' => 'hello_route']](https://image.slidesharecdn.com/uwm8xqhatx2i8oto611x-140628042601-phpapp01/75/Forget-about-index-php-and-build-you-applications-around-HTTP-77-2048.jpg)
![$route = new Route('/', array('controller' => 'HelloController')); $routes = new RouteCollection(); $routes-‐>add('hello_route', $route); ! $context = new RequestContext(); $context-‐>fromRequest($request); ! $matcher = new UrlMatcher($routes, $context); ! $parameters = $matcher-‐>match('/'); // ['controller' => 'HelloController', '_route' => 'hello_route']](https://image.slidesharecdn.com/uwm8xqhatx2i8oto611x-140628042601-phpapp01/75/Forget-about-index-php-and-build-you-applications-around-HTTP-78-2048.jpg)
![$route = new Route('/', array('controller' => 'HelloController')); $routes = new RouteCollection(); $routes-‐>add('hello_route', $route); ! $context = new RequestContext(); $context-‐>fromRequest($request); ! $matcher = new UrlMatcher($routes, $context); ! $parameters = $matcher-‐>match('/'); // ['controller' => 'HelloController', '_route' => 'hello_route']](https://image.slidesharecdn.com/uwm8xqhatx2i8oto611x-140628042601-phpapp01/75/Forget-about-index-php-and-build-you-applications-around-HTTP-79-2048.jpg)
![$route = new Route('/', array('controller' => 'HelloController')); $routes = new RouteCollection(); $routes-‐>add('hello_route', $route); ! $context = new RequestContext(); $context-‐>fromRequest($request); ! $matcher = new UrlMatcher($routes, $context); ! $parameters = $matcher-‐>match('/'); // ['controller' => 'HelloController', '_route' => 'hello_route']](https://image.slidesharecdn.com/uwm8xqhatx2i8oto611x-140628042601-phpapp01/75/Forget-about-index-php-and-build-you-applications-around-HTTP-80-2048.jpg)
Uploaded byKacper Gunia
Forget about index.php and build you applications around HTTP!
The document discusses the foundational aspects of building web applications using HTTP and Symfony's request-response model, emphasizing the importance of interpreting requests and generating appropriate responses. It covers the object-oriented approach to handling HTTP requests and responses, alongside the use of Symfony components like HttpFoundation and EventDispatcher. Furthermore, it highlights Symfony's routing and controller resolution processes, demonstrating how these elements interact to create a structured application environment.
Forget about index.php and build you applications around HTTP!
- 1. FORGET ABOUT INDEX.PHP BUILDYOUR APPLICATIONS AROUND HTTP!
- 2. Kacper Gunia @cakper SoftwareEngineer @SensioLabsUK Symfony Certified Developer PHPers Silesia @PHPersPL
- 3.
- 4. Hello world inPHP“ ” + tutorial
- 5. Gojko’s two factsabout programming web: 1)Ctrl-C 2)Ctrl-V
- 6. <?php ! $name = $_GET['name']; echo "Hello $name!";
- 8.
- 9.
- 12.
- 13.
- 14.
- 15. This is whatHTTP is about! Request Response
- 16. This is whatYour App is about! Request Response
- 17. “(…) the goalof your application is always to interpret a request and create the appropriate response based on your application logic.” Symfony.com
- 18.
- 19.
- 20. GET /index.php?name=Kacper HTTP/1.1 Host: localhost:8000
- 21. GET /index.php?name=Kacper HTTP/1.1 Host: localhost:8000 I want to see…
- 22. GET /index.php?name=Kacper HTTP/1.1 Host: localhost:8000 …this resource!
- 23. GET /index.php?name=Kacper HTTP/1.1 Host: localhost:8000 And I know it should be on localhost
- 24. GET /index.php?name=Kacper HTTP/1.1 Host: localhost:8000 Psst, I’m using 1.1 version of HTTP protocol
- 25.
- 26. HTTP/1.1 200 OK Host: localhost:8000 Content-‐type: text/html ! Hello Kacper!
- 27. HTTP/1.1 200 OK Host: localhost:8000 Content-‐type: text/html ! Hello Kacper! OK man, I’ve found it!
- 28. HTTP/1.1 200 OK Host: localhost:8000 Content-‐type: text/html ! Hello Kacper! And it’s an HTML
- 29. HTTP/1.1 200 OK Host: localhost:8000 Content-‐type: text/html ! Hello Kacper! Hello World!
- 30. [METH] [REQUEST-‐URI] HTTP/[VER] [Field1]: [Value1] [Field2]: [Value2] ! [request body, if any] HTTP/[VER] [CODE] [TEXT] [Field1]: [Value1] [Field2]: [Value2] ! [response body] ResponseRequest
- 31. What if wecreate objects from Request & Response?
- 32.
- 33. GET /index.php?name=Kacper HTTP/1.1 Host: localhost:8000 $request-‐>getMethod(); GET $request-‐>getPathInfo(); /
- 34. HTTP/1.1 200 OK Host: localhost:8000 Content-‐type: text/html ! Hello Kacper! $response-‐>getStatusCode(); 200 $response-‐>getContent(); Hello Kacper!
- 35.
- 36. “The HttpFoundation component defines anobject-oriented layer for the HTTP specification” Symfony.com
- 37.
- 38. $request = Request::createFromGlobals(); ! $request = new Request( $_GET, $_POST, array(), $_COOKIE, $_FILES, $_SERVER );
- 39. ! $_GET $request-‐>query $_POST $request-‐>request $_COOKIE $request-‐>cookies $_FILES $request-‐>files $_SERVER $request-‐>server ! $request-‐>headers $request-‐>attributes ParameterBag instances
- 40. $name = isset($_GET['name']) ? $_GET['name'] : "World"; $name = $request -‐>query -‐>get('name', 'World');
- 41. $request-‐>isSecure(); Verify configured headeror standard one
- 42.
- 43. $request = Request::create( '/', 'GET', ['name' => 'Kacper'] ); Simulate a Request
- 44.
- 45. $response = new Response( ‘Hello Kacper!’, Response::HTTP_OK, ['content-‐type' => 'text/html'] ); ! $response-‐>prepare($request); $response-‐>send();
- 46. $response = new RedirectResponse( 'http://example.com/' ); Redirect Response
- 47. $response = new JsonResponse(); $response-‐>setData(['name' => 'Kacper']); JSON Response
- 48. Let’s use themtogether!
- 49. $kernel = new AppKernel('dev', true); ! $request = Request::createFromGlobals(); $response = $kernel-‐>handle($request); $response-‐>send(); ! $kernel-‐>terminate($request, $response); Symfony app_dev.php
- 50. $kernel = new AppKernel('dev', true); ! $request = Request::createFromGlobals(); $response = $kernel-‐>handle($request); $response-‐>send(); ! $kernel-‐>terminate($request, $response); Symfony app_dev.php
- 51.
- 52.
- 53.
- 54. ”The Front Controller consolidatesall request handling by channeling requests through a single handler object (…)” MartinFowler.com
- 55. $kernel = new AppKernel('dev', true); ! $request = Request::createFromGlobals(); $response = $kernel-‐>handle($request); $response-‐>send(); ! $kernel-‐>terminate($request, $response);
- 56.
- 57.
- 58. “The HttpKernel component providesa structured process for converting a Request into a Response by making use of the EventDispatcher.” Symfony.com
- 59. interface HttpKernelInterface { const MASTER_REQUEST = 1; const SUB_REQUEST = 2; ! /** * @return Response A Response instance */ public function handle( Request $request, $type = self::MASTER_REQUEST, $catch = true); }
- 60. How Symfony transforms Requestinto Response?
- 62.
- 63. “The EventDispatcher component providestools that allow your application components to communicate with each other by dispatching events and listening to them.” Symfony.com
- 64. EventDispatcher is an implementation ofMediator pattern
- 65. $dispatcher = new EventDispatcher(); $dispatcher-‐>addListener( 'foo.action', function (Event $event) { // do whatever you need }); ! $event = new Event(); $dispatcher-‐>dispatch('foo.action', $event);
- 66.
- 68.
- 69. …you can even returna Response!
- 70. public function onKernelRequest(GetResponseEvent $event) { $request = $event-‐>getRequest(); if ($request-‐>query-‐>get('name') === 'Kacper') { $event-‐>setResponse( new Response("We don't like you!") ); } }
- 72. …or e.g. detect device,location…
- 73.
- 74.
- 75. “The Routing component mapsan HTTP request to a set of configuration variables.” Symfony.com
- 76. $route = new Route('/', array('controller' => 'HelloController')); $routes = new RouteCollection(); $routes-‐>add('hello_route', $route); ! $context = new RequestContext(); $context-‐>fromRequest($request); ! $matcher = new UrlMatcher($routes, $context); ! $parameters = $matcher-‐>match('/'); // ['controller' => 'HelloController', '_route' => 'hello_route']
- 77. $route = new Route('/', array('controller' => 'HelloController')); $routes = new RouteCollection(); $routes-‐>add('hello_route', $route); ! $context = new RequestContext(); $context-‐>fromRequest($request); ! $matcher = new UrlMatcher($routes, $context); ! $parameters = $matcher-‐>match('/'); // ['controller' => 'HelloController', '_route' => 'hello_route']
- 78. $route = new Route('/', array('controller' => 'HelloController')); $routes = new RouteCollection(); $routes-‐>add('hello_route', $route); ! $context = new RequestContext(); $context-‐>fromRequest($request); ! $matcher = new UrlMatcher($routes, $context); ! $parameters = $matcher-‐>match('/'); // ['controller' => 'HelloController', '_route' => 'hello_route']
- 79. $route = new Route('/', array('controller' => 'HelloController')); $routes = new RouteCollection(); $routes-‐>add('hello_route', $route); ! $context = new RequestContext(); $context-‐>fromRequest($request); ! $matcher = new UrlMatcher($routes, $context); ! $parameters = $matcher-‐>match('/'); // ['controller' => 'HelloController', '_route' => 'hello_route']
- 80. $route = new Route('/', array('controller' => 'HelloController')); $routes = new RouteCollection(); $routes-‐>add('hello_route', $route); ! $context = new RequestContext(); $context-‐>fromRequest($request); ! $matcher = new UrlMatcher($routes, $context); ! $parameters = $matcher-‐>match('/'); // ['controller' => 'HelloController', '_route' => 'hello_route']
- 81.
- 83. interface ControllerResolverInterface { public function getController( Request $request ); ! public function getArguments( Request $request, $controller ); }
- 84. Controller is a PHPcallable
- 85.
- 87. Change controller here (ifyou need)
- 88.
- 89.
- 90.
- 92. interface ControllerResolverInterface { public function getController( Request $request ); ! public function getArguments( Request $request, $controller ); }
- 93.
- 94.
- 96.
- 97.
- 98.
- 100.
- 101.
- 102. e.g. transform arrays into JSONResponses
- 103.
- 105.
- 106.
- 107.
- 108.
- 109.
- 110.
- 111.
- 112.
- 113.
- 114. $response = new Response(); ! $response-‐>setPublic(); $response-‐>setMaxAge(600); $response-‐>setSharedMaxAge(600);
- 115.
- 116. public function indexAction(Request $request, $name) { $response = new Response("Hello $name"); $response-‐>setETag(md5($response-‐>getContent())); $response-‐>setPublic(); $response-‐>isNotModified($request); ! return $response; }
- 117.
- 118. “The ESI specification describestags you can embed in your pages to communicate with the gateway cache.” Symfony.com
- 119. <!DOCTYPE html> <html> <body> <!-‐-‐ ... content -‐-‐> ! <!-‐-‐ Embed the content of another page -‐-‐> <esi:include src="http://..."/> ! <!-‐-‐ ... content -‐-‐> </body> </html>
- 120. But I don’thave Varnish!
- 121.
- 122. $kernel = new AppKernel('prod', false); $kernel-‐>loadClassCache(); ! $kernel = new AppCache($kernel); ! $request = Request::createFromGlobals(); $response = $kernel-‐>handle($request); $response-‐>send(); $kernel-‐>terminate($request, $response);
- 123. $kernel = new AppKernel('prod', false); $kernel-‐>loadClassCache(); ! $kernel = new AppCache($kernel); ! $request = Request::createFromGlobals(); $response = $kernel-‐>handle($request); $response-‐>send(); $kernel-‐>terminate($request, $response);
- 124. OK, but arethose things actually used outside of Symfony?
- 125.
- 126.
- 127. Kacper Gunia Software Engineer SymfonyCertified Developer PHPers Silesia Thanks!
- 128.