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

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Hi, my name is Hannes.

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madewithlove.be

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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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Differences with Symfony objects: Interfaces, not concretions PSR/HTTP-MESSAGE

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Differences with Symfony objects: Interfaces, not concretions 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 Showtime

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

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PSR/HTTP-MESSAGE What about Symfony Request/Response objects?

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PSR/HTTP-MESSAGE symfony/psr-http-message-bridge uses: zendframework/zend-diactoros

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PSR/HTTP-MESSAGE PSR-7 request/response object ⁷ ⁷ Symfony request/response object

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2. guzzlehttp/guzzle

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GUZZLEHTTP/GUZZLE composer require guzzlehttp/guzzle

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GUZZLEHTTP/GUZZLE major version 6

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GUZZLEHTTP/GUZZLE composer.json ^6.1

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GUZZLEHTTP/GUZZLE composer.lock 6.1.0

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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 "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 "require": { "php": ">=5.6.0", "guzzlehttp/psr7": "^1.1", }

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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 - PROMISES "require": { "php": ">=5.6.0", "guzzlehttp/psr7": "^1.1", "guzzlehttp/promise": "^1.0" }

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GUZZLEHTTP/GUZZLE - PROMISES $promise = $client->sendAsync($request); $promise->then(function ($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 Previously (<4.0.0) symfony/event-dispatcher Later (>=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) { // Do before return $handler($request, $options) ->then(function (ResponseInterface $resp // Do after return $response; }); }; }

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

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

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

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GUZZLEHTTP/GUZZLE - WHAT ELSE What else?

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GUZZLEHTTP/GUZZLE - PROGRESS $request->getEmitter()->on( 'progress', function (ProgressEvent $event) { … } );

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GUZZLEHTTP/GUZZLE - PROGRESS Is gone! (>=5.0.0, <6.0.0)

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GUZZLEHTTP/GUZZLE - PROGRESS No progress on promise? Too bad!

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GUZZLEHTTP/GUZZLE - PROGRESS Roll your own

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GUZZLEHTTP/GUZZLE - PROGRESS // Psr\Http\Message\StreamInterface $stream = $response->getBody(); $stream->getSize(); $stream->eof(); $stream->read(1024);

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GUZZLEHTTP/GUZZLE - PROGRESS use Symfony\Component\Console \Helper\ProgressBar;

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GUZZLEHTTP/GUZZLE - PROGRESS 10104/455642 [======>---------------------] 22% 14 sec/59 sec 2.4 MB

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GUZZLEHTTP/GUZZLE - PROGRESS 15214/455642 [=========>------------------] 33% 21 sec/58 sec 2.6 MB

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GUZZLEHTTP/GUZZLE - PROGRESS 20325/455642 [============>---------------] 43% 28 sec/59 sec 2.7 MB

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GUZZLEHTTP/GUZZLE - PROGRESS 20325/455642 [===============>------------] 53% 35 sec/58 sec 2.7 MB

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GUZZLEHTTP/GUZZLE - PROGRESS 20325/455642 [==================>---------] 59% 39 sec/58 sec 3.0 MB

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GUZZLEHTTP/GUZZLE - PROGRESS 20325/455642 [==================>---------] 59% 39 sec/58 sec 3.0 MB

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GUZZLEHTTP/GUZZLE - PROGRESS 20325/455642 [==================>---------] 59% 39 sec/58 sec 3.0 MB

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GUZZLEHTTP/GUZZLE - PROGRESS 20325/455642 [==================>---------] 59% 39 sec/58 sec 3.0 MB

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GUZZLEHTTP/GUZZLE - PROGRESS 20325/455642 [==================>---------] 59% 39 sec/58 sec 3.0 MB

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GUZZLEHTTP/GUZZLE - PROGRESS 20325/455642 [==================>---------] 59% 39 sec/58 sec 3.0 MB

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GUZZLEHTTP/GUZZLE - RECAP Uses PSR-7 interfaces Middlewares instead of Events Async & Promises

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3. More PSR-7 usages

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Interface for PSR-7 HTTP Clients

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PHP-HTTP/HTTPLUG Imagine you’re writing an SDK for GitHub/Slack/Hipchat/DO/…

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PHP-HTTP/HTTPLUG composer require guzzlehttp/guzzle

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PHP-HTTP/HTTPLUG - :CRY: “I already use Zend’s HTTP client! ”

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PHP-HTTP/HTTPLUG - :CRY: “I can’t install Guzzle v5 ánd v6! ”

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PHP-HTTP/HTTPLUG - SOLUTION Decouple from the HTTP client

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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/adapter-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

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PHP-HTTP/HTTPLUG - ADAPTERS buzz-adapter react-adapter socket-adapter fopen-adapter file-get-contents-adapter native-curl-adapter pecl-adapter

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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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PHP-HTTP/HTTPLUG - COMPOSER.JSON $github = new Github\Client( // SDK new Http\Adapter\Guzzle6HttpAdapter( new GuzzleHttp\Client() ) );

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PHP-HTTP/ADAPTER - DEMO Demo https:/ /github.com/hannesvdvreken/psr7-demo/tree/master/5-github

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ADAPTERS - HTTP - Logging - File system

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ADAPTERS Sadly not for caching

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ADAPTERS psr/cache PSR-6 being voted on

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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 (…) { // Before … $response = $next($request, $response); // After … return $response; }

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

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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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RECAP HTTP client interface Middleware definition + upgrade path

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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 @phplimbe

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Thank you! @hannesvdvreken @phplimbe

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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