Cormy Bamboo

🎍 Bamboo style PSR-7 middleware pipe using generators

Install

composer require cormy/bamboo

Usage

use Cormy\Server\Bamboo;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;

// create your bamboo stem nodes, aka middlewares
$nodes = [];

$nodes[] = function (ServerRequestInterface $request):\Generator {
    // delegate $request to the next request handler, i.e. the middleware right below
    $response = (yield $request);

    return $response->withHeader('X-PoweredBy', 'Unicorns');
};

$nodes[] = function (ServerRequestInterface $request):\Generator {
    // delegate $request to the next request handler, i.e. the $finalHandler below
    $response = (yield $request);

    return $response->withHeader('content-type', 'application/json; charset=utf-8');
};

// create the middleware pipe
$middlewarePipe = new Bamboo($nodes);

// create a handler for requests which reached the end of the pipe
$finalHandler = function (ServerRequestInterface $request):ResponseInterface {
    return new \Zend\Diactoros\Response();
};

// and dispatch a request
$response = $middlewarePipe->dispatch(new \Zend\Diactoros\ServerRequest(), $finalHandler);

API

Cormy\Server\Bamboo implements MiddlewareInterface

Bamboo::__construct

/**
 * Bamboo style PSR-7 middleware pipe.
 *
 * @param (callable|MiddlewareInterface)[] $nodes the middlewares, which requests pass through
 */
public function __construct(array $nodes)

Bamboo::dispatch

/**
 * Process an incoming server request and return the response.
 *
 * @param ServerRequestInterface           $request
 * @param callable|RequestHandlerInterface $finalHandler
 *
 * @return ResponseInterface
 */
public function dispatch(ServerRequestInterface $request, callable $finalHandler):ResponseInterface

Inherited from MiddlewareInterface::__invoke

/**
 * Process an incoming server request and return the response, optionally delegating
 * to the next request handler.
 *
 * @param ServerRequestInterface $request
 *
 * @return Generator yields PSR `ServerRequestInterface` instances and returns a PSR `ResponseInterface` instance
 */
public function __invoke(ServerRequestInterface $request):Generator;

Related

• Cormy\Server\Onion – Onion style PSR-7 middleware stack using generators
• Cormy\Server\MiddlewareDispatcher – Cormy PSR-7 server middleware dispatcher
• Cormy\Server\RequestHandlerInterface – Common interfaces for PSR-7 server request handlers
• Cormy\Server\MiddlewareInterface – Common interfaces for Cormy PSR-7 server middlewares

License

MIT © Michael Mayer