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HTTP messages Modern way of dealing with HTTP in PHP @hannesvdvreken @istanbulphp

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Hi, my name is Hannes.

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!

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madewithlove.be 20 × !%&'()

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PSR-7

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PSR-7 Common interfaces for HTTP messages

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1. psr/http-message 2. guzzlehttp/guzzle 3. More PSR-7 usages

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1. psr/http-message

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Common interfaces for HTTP messages

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Common interfaces for HTTP messages - Works in any Framework - Both for HTTP Clients and HTTP applications - HTTP version independent

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Common interfaces for HTTP messages

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Pre-PSR-7

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composer req symfony/http-foundation

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Differences with Symfony HTTP foundation: Interfaced PSR/HTTP-MESSAGE

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Differences with Symfony HTTP foundation: Interfaced Immutable PSR/HTTP-MESSAGE

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$newRequest = $request ->withHeader($name, $value); var_dump($newRequest === $request); > false PSR/HTTP-MESSAGE

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PSR/HTTP-MESSAGE let’s take a look

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PSR/HTTP-MESSAGE - RECAP MessageInterface RequestInterface ResponseInterface StreamInterface❗ UriInterface ServerRequestInterface ($_GET, $_POST, $_SERVER, $_COOKIES, $_FILES)

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PSR/HTTP-MESSAGE guzzlehttp/psr7 zendframework/zend-diactoros

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2. guzzlehttp/guzzle

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GUZZLEHTTP/GUZZLE composer req guzzlehttp/guzzle

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GUZZLEHTTP/GUZZLE composer.json ^6.2

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…

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semver.mwl.be

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GUZZLEHTTP/GUZZLE What’s new?

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GUZZLEHTTP/GUZZLE - WHAT’S NEW PSR-7

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GUZZLEHTTP/GUZZLE - PSR-7 guzzlehttp/psr7

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GUZZLEHTTP/GUZZLE - PSR-7 - COMPOSER.JSON "provide": { "psr/http-message-implementation": "1.0" },

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GUZZLEHTTP/GUZZLE - PSR-7 use GuzzleHttp\Psr7\Request; $psrRequest = new Request( 'GET', $uri, $headers, $body );

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GUZZLEHTTP/GUZZLE - PSR-7 $client = new GuzzleHttp\Client(); $client->send($psrRequest);

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GUZZLEHTTP/GUZZLE - PSR-7 Demo https:/ /github.com/hannesvdvreken/psr7-demo/tree/master/1-guzzle

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GUZZLEHTTP/GUZZLE - WHAT’S NEW What else?

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GUZZLEHTTP/GUZZLE - PROMISES Promises

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GUZZLEHTTP/GUZZLE - PROMISES Not so new: (>=5.0.0) Promises

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GUZZLEHTTP/GUZZLE - PSR-7 guzzlehttp/promise

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GUZZLEHTTP/GUZZLE - PROMISES use Psr\Http\Message\ResponseInterface as Res; $promise = $client->sendAsync($request); $promise->then(function (Res $response) { $response->getBody(); }); $promise->wait();

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GUZZLEHTTP/GUZZLE - PROMISES Demo https:/ /github.com/hannesvdvreken/psr7-demo/tree/master/2-promise https:/ /github.com/hannesvdvreken/psr7-demo/tree/master/3-multi

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GUZZLEHTTP/GUZZLE - WHAT’S NEW What else?

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GUZZLEHTTP/GUZZLE - EVENTING (>=4.0.0, <6.0.0) GuzzleHttp\Event\EmitterInterface GuzzleHttp\Event\SubscriberInterface

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GUZZLEHTTP/GUZZLE - MIDDLEWARES Now (>=6.0.0) Callable middlewares

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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; }); }; }

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GUZZLEHTTP/GUZZLE - MIDDLEWARES use GuzzleHttp\Middleware; $middleware = Middleware::mapRequest( function (RequestInterface $request) { // Modify request return $request; } );

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GUZZLEHTTP/GUZZLE - MIDDLEWARES use GuzzleHttp\Middleware; $middleware = Middleware::mapResponse( function (ResponseInterface $request) { // Modify response return $response; } );

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GUZZLEHTTP/GUZZLE - MIDDLEWARES $middleware = GuzzleHttp\Middleware::log( $psr3Logger, new GuzzleHttp\MessageFormatter() );

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GUZZLEHTTP/GUZZLE - MIDDLEWARES $stack = HandlerStack::create(); $stack->push($middleware); $stack->unshift($middleware); $stack->remove($middleware); $client = new Client(['handler' => $stack]);

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GUZZLEHTTP/GUZZLE - MIDDLEWARES Demo https:/ /github.com/hannesvdvreken/psr7-demo/tree/master/4-middleware

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GUZZLEHTTP/GUZZLE - RECAP Provides PSR-7 interfaced objects Middlewares instead of Eventing Async & Promises

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3. More PSR-7 usages

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Decoupling HTTP Clients

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PHP-HTTP/HTTPLUG - SOLUTION php-http/httplug

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PHP-HTTP/HTTPLUG - SOLUTION interface HttpAdapter { public function sendRequest($request); public function sendRequests(array $requests); }

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PHP-HTTP/HTTPLUG - SOLUTION Virtual package "provide": {
 "php-http/client-implementation": "^0.1.0", }

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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

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PHP-HTTP/HTTPLUG - COMPOSER.JSON "require": { "guzzlehttp/guzzle": "^5.0", "your-awesome/sdk": "^1.0",
 "php-http/guzzle5-adapter": "^0.1.0" }

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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" }

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START USING PSR-7 IN YOUR APP What about existing Symfony Request/Response objects?

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START USING PSR-7 IN YOUR APP symfony/psr-http-message-bridge

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START USING PSR-7 IN YOUR APP Symfony request/response object ⁷ ⁷ PSR-7 request/response object

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START USING PSR-7 IN YOUR APP Symfony request/response object ⁷ ⁷ Zend request/response object \Psr\Http\Message\RequestInterface type hinted

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Middlewares wrapping HTTP applications

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MIDDLEWARE DEFINITION function ( RequestInterface $request, ResponseInterface $response, callable $next ) {…};

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MIDDLEWARE DEFINITION function ($request, $response, $next) { // Alter request, if you want $response = $next($request, $response); // Alter response, if you want return $response; }

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MIDDLEWARE DEFINITION Session Logging Authentication Robots.txt file HTTP Cache Firewall Cors Throttling …

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MIDDLEWARE DEFINITION Build your stack with: relay/relay mindplay/middleman

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MIGRATION FROM STACKPHP What about StackPHP (Symfony HTTP Kernel)?

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MIGRATION FROM STACKPHP h4cc/stack-psr7-bridge uses: symfony/psr-http-message-bridge

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MIGRATION FROM STACKPHP stack middleware ⁷ psr-7 middleware

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MIGRATION FROM STACKPHP Demo https:/ /github.com/hannesvdvreken/psr7-demo/tree/master/6-middleware

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RECAP HTTP client decoupling Symfony objects to PSR-7 objects Application middlewares

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RECAP 1. psr/http-message 2. guzzlehttp/guzzle 3. More PSR-7 usages

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Time for questions. @hannesvdvreken @istanbulphp

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Thank you! https://joind.in/talk/87f8c @hannesvdvreken @istanbulphp

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• 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