Modern HTTP handling with PHP - PHP UK Conference

PSR-7 describes common interfaces for representing HTTP messages. HTTP messages are the foundation of web development. Web browsers and HTTP clients such as cURL create HTTP request messages that are sent to a web server, which provides an HTTP response message. Server-side code receives an HTTP request message, and returns an HTTP response message.

This talk will explain the interfaces defined by PSR-7, how they define the future of interoperability between frameworks and tools. After that there will be a showcase of several implementations and tools such as zend's diactoros package, Guzzle v6, php-http, RelayPHP and other packages that show the real power of shared interfaces for HTTP objects. A clear path to how we can start using these typed objects in our applications today will be shown.

Feedback here: https://joind.in/talk/b34d2

Transcript

1. HTTP messages Modern way of dealing with HTTP in PHP @hannesvdvreken @phpukconference
2. Hi, my name is Hannes.
3. !
4. madewithlove.be
5. PSR-7
6. PSR-7 Common interfaces for HTTP messages
7. 1. psr/http-message 2. guzzlehttp/guzzle 3. More PSR-7 usages
8. 1. psr/http-message
9. Common interfaces for HTTP messages
10. Common interfaces for HTTP messages - Works in any Framework - Both for HTTP Clients and HTTP applications - HTTP version independent
11. Common interfaces for HTTP messages
12. Pre-PSR-7
13. composer req symfony/http-foundation
14. Differences with Symfony HTTP foundation: Interfaced PSR/HTTP-MESSAGE
15. Differences with Symfony HTTP foundation: Interfaced Immutable PSR/HTTP-MESSAGE
16. $newRequest = $request ->withHeader($name, $value); var_dump($newRequest === $request); > false PSR/HTTP-MESSAGE
17. PSR/HTTP-MESSAGE let’s take a look
18. PSR/HTTP-MESSAGE - RECAP MessageInterface RequestInterface ResponseInterface StreamInterface❗ UriInterface ServerRequestInterface ($_GET, $_POST, $_SERVER, $_COOKIES, $_FILES)
19. PSR/HTTP-MESSAGE guzzlehttp/psr7 zendframework/zend-diactoros
20. 2. guzzlehttp/guzzle
21. GUZZLEHTTP/GUZZLE composer req guzzlehttp/guzzle
22. GUZZLEHTTP/GUZZLE composer.json ^6.1
23. …
24. semver.mwl.be
25. GUZZLEHTTP/GUZZLE What’s new?
26. GUZZLEHTTP/GUZZLE - WHAT’S NEW PSR-7
27. GUZZLEHTTP/GUZZLE - PSR-7 guzzlehttp/psr7
28. GUZZLEHTTP/GUZZLE - PSR-7 - COMPOSER.JSON "provide": { "psr/http-message-implementation": "1.0" },
31. GUZZLEHTTP/GUZZLE - PSR-7 use GuzzleHttp\Psr7\Request; $psrRequest = new Request( 'GET', $uri, $headers, $body );
32. GUZZLEHTTP/GUZZLE - PSR-7 $client = new GuzzleHttp\Client(); $client->send($psrRequest);
33. GUZZLEHTTP/GUZZLE - PSR-7 Demo https:/ /github.com/hannesvdvreken/psr7-demo/tree/master/1-guzzle
34. GUZZLEHTTP/GUZZLE - WHAT’S NEW What else?
35. GUZZLEHTTP/GUZZLE - PROMISES Promises
36. GUZZLEHTTP/GUZZLE - PROMISES Not so new: (>=5.0.0) Promises
37. GUZZLEHTTP/GUZZLE - PSR-7 guzzlehttp/promise
38. GUZZLEHTTP/GUZZLE - PROMISES use Psr\Http\Message\ResponseInterface as Res; $promise = $client->sendAsync($request); $promise->then(function (Res $response) { $response->getBody(); }); $promise->wait();
39. GUZZLEHTTP/GUZZLE - PROMISES Demo https:/ /github.com/hannesvdvreken/psr7-demo/tree/master/2-promise https:/ /github.com/hannesvdvreken/psr7-demo/tree/master/3-multi
40. GUZZLEHTTP/GUZZLE - WHAT’S NEW What else?
41. GUZZLEHTTP/GUZZLE - EVENTING (>=4.0.0, <6.0.0) GuzzleHttp\Event\EmitterInterface GuzzleHttp\Event\SubscriberInterface
42. GUZZLEHTTP/GUZZLE - MIDDLEWARES Now (>=6.0.0) Callable middlewares
43. GUZZLEHTTP/GUZZLE - MIDDLEWARES $middleware = function ($handler) { return function ($request, $options) use ($handler) // Alter request, if you want return $handler($request, $options) ->then(function (ResponseInterface $respons // Alter response, if you want return $response; }); }; }
44. GUZZLEHTTP/GUZZLE - MIDDLEWARES use GuzzleHttp\Middleware; $middleware = Middleware::mapRequest( function (RequestInterface $request) { // Modify request return $request; } );
45. GUZZLEHTTP/GUZZLE - MIDDLEWARES use GuzzleHttp\Middleware; $middleware = Middleware::mapResponse( function (ResponseInterface $request) { // Modify response return $response; } );
46. GUZZLEHTTP/GUZZLE - MIDDLEWARES $middleware = GuzzleHttp\Middleware::log( $psr3Logger, new GuzzleHttp\MessageFormatter() );
47. GUZZLEHTTP/GUZZLE - MIDDLEWARES $stack = HandlerStack::create(); $client = new Client(['handler' => $stack]); $stack->push($middleware); $stack->unshift($middleware); $stack->remove($middleware);
48. GUZZLEHTTP/GUZZLE - MIDDLEWARES Demo https:/ /github.com/hannesvdvreken/psr7-demo/tree/master/4-middleware
49. GUZZLEHTTP/GUZZLE - RECAP Provides PSR-7 interfaced objects Middlewares instead of Eventing Async & Promises
50. 3. More PSR-7 usages
51. Decoupling HTTP Clients
52. Imagine you’re writing an SDK for GitHub/Slack/Hipchat/DO/…
53. composer req guzzlehttp/guzzle
55. “I can’t install Guzzle v5 ánd v6! ”
56. “I already use Zend’s HTTP client! ”
57. PHP-HTTP/HTTPLUG - SOLUTION Decouple from the HTTP client
59. PHP-HTTP/HTTPLUG - SOLUTION interface HttpAdapter { public function sendRequest($request); public function sendRequests(array $requests); }
60. PHP-HTTP/HTTPLUG - SOLUTION php-http/httplug
61. PHP-HTTP/HTTPLUG - SOLUTION "require": { …
 "php-http/client-implementation": "^0.1.0", }
62. PHP-HTTP/HTTPLUG - SOLUTION Virtual package "provide": {
 "php-http/client-implementation": "^0.1.0", }
63. PHP-HTTP/HTTPLUG - ADAPTERS guzzle6-adapter guzzle5-adapter guzzle4-adapter guzzle3-adapter zend2-adapter zend1-adapter cake-adapter buzz-adapter react-adapter socket-client fopen-adapter file-get-contents-adapter curl-client mock-client
64. PHP-HTTP/HTTPLUG - COMPOSER.JSON "require": { "guzzlehttp/guzzle": "^5.0", "your-awesome/sdk": "^1.0",
 "php-http/guzzle5-adapter": "^0.1.0" }
65. PHP-HTTP/HTTPLUG - COMPOSER.JSON "require": { - "guzzlehttp/guzzle": "^5.0", + "guzzlehttp/guzzle": "^6.0", "your-awesome/sdk": "^1.0",
 - "php-http/guzzle5-adapter": "^0.1.0" + "php-http/guzzle6-adapter": "^0.1.0" }
66. PHP-HTTP/HTTPLUG - WRAPPING $github = new Your\Sdk\Client( new Http\Adapter\Guzzle6HttpAdapter( new GuzzleHttp\Client() ) );
68. START USING PSR-7 IN YOUR APP What about existing Symfony Request/Response objects?
69. START USING PSR-7 IN YOUR APP symfony/psr-http-message-bridge
70. START USING PSR-7 IN YOUR APP Symfony request/response object ⁷ ⁷ PSR-7 request/response object
71. START USING PSR-7 IN YOUR APP Symfony request/response object ⁷ ⁷ Zend request/response object \Psr\Http\Message\RequestInterface type hinted
72. Middlewares wrapping HTTP applications
74. MIDDLEWARE DEFINITION function ( RequestInterface $request, ResponseInterface $response, callable $next ) {…};
75. MIDDLEWARE DEFINITION function ($request, $response, $next) { // Alter request, if you want $response = $next($request, $response); // Alter response, if you want return $response; }
76. MIDDLEWARE DEFINITION Session Logging Authentication Robots.txt file HTTP Cache Firewall Cors Throttling …
77. MIGRATION FROM STACKPHP What about StackPHP (Symfony HTTP Kernel)?
78. MIGRATION FROM STACKPHP h4cc/stack-psr7-bridge uses: symfony/psr-http-message-bridge
79. MIGRATION FROM STACKPHP stack middleware ⁷ psr-7 middleware
80. RECAP HTTP client decoupling Symfony objects to PSR-7 objects Application middlewares
81. RECAP 1. psr/http-message 2. guzzlehttp/guzzle 3. More PSR-7 usages
82. Time for questions. @hannesvdvreken @phpukconference
83. Thank you! https://joind.in/talk/b34d2 @hannesvdvreken @phpukconference
84. • http:/ /mwl.be • https:/ /github.com/guzzle/guzzle • https:/ /github.com/php-http • http:/ /docs.guzzlephp.org/en/latest/ • https:/ /github.com/php-fig/http-message • https:/ /github.com/php-fig/fig-standards/
 blob/master/accepted/PSR-7-http-message.md REFERENCES