Aura router

Aura router Psr-15 middleware and request handler.

Require php >= 7.0

Installation composer require ellipse/router-aura

Run tests ./vendor/bin/kahlan

• Usage as request handler
• Usage as middleware

Usage as request handler

This package provides an Ellipse\Router\AuraRouterRequestHandler Psr-15 request handler taking an instance of Aura\Router\RouterContainer as parameter.

This aura router is expected to have a populated map or to have a map builder defined, usually using its ->setMapBuilder() method. The route handlers it matches are expected to be implementations of Psr\Http\Server\RequestHandlerInterface.

When the AuraRouterRequestHandler handles a request the aura router is used to match a Psr-15 request handler. When the matched route pattern contains placeholders, a new request is created with those placeholders => matched value pairs as request attributes. Finally the matched request handler is proxied with this new request to actually return a response.

Setting the aura router map builder using its ->setMapBuilder() method allows the time consuming task of mapping routes to be performed only when the request is handled with the AuraRouterRequestHandler. If for some reason an application handles the incoming request with another request handler, no time is lost mapping routes for this one.

Regarding exceptions:

• An Ellipse\Router\Exceptions\MatchedHandlerTypeException is thrown when the route handler matched by the aura router is not an implementation of Psr\Http\Server\RequestHandlerInterface.
• An Ellipse\Router\Exceptions\NotFoundException is thrown when no route match the url.
• An Ellipse\Router\Exceptions\MethodNotAllowedException is thrown when a route matches the url but the request http method is not allowed by the matched route.
• An Ellipse\Router\Exceptions\AuraMatcherException is thrown when any other aura router rule failed.

<?php

namespace App;

use Aura\Router\RouterContainer;

use Ellipse\Router\AuraRouterRequestHandler;

// Get a psr7 request.
$request = some_psr7_request_factory();

// Create an aura router.
$router = new RouterContainer;

// Set the router map builder.
$router->setMapBuilder(function ($map) {

    // The route handlers must be Psr-15 request handlers.
    $map->get('index', '/', new SomeRequestHandler);

    // When this route is matched a new request with an 'id' attribute would be passed to the request handler.
    $map->get('path', '/path/{id}', new SomeOtherRequestHandler);

});

// Create an aura router request handler using this aura router.
$handler = new AuraRouterRequestHandler($router);

// Produce a response with the aura router request handler.
$response = $handler->handle($request);

Usage as middleware

This package provides an Ellipse\Router\AuraRouterMiddleware Psr-15 middleware also taking an aura router as parameter.

Under the hood it creates a AuraRouterRequestHandler with the given aura router and use it to handle the request. When a NotFoundException is thrown, the request processing is delegated to the next middleware.

<?php

namespace App;

use Aura\Router\RouterContainer;

use Ellipse\Router\AuraRouterMiddleware;

// Get a psr7 request.
$request = some_psr7_request_factory();

// Create an aura router.
$router = new RouterContainer;

// Set the router map builder.
$router->setMapBuilder(function ($map) {

    // The route handlers must be Psr-15 request handlers.
    $map->get('index', '/', new SomeRequestHandler);

    // When this route is matched a new request with an 'id' attribute would be passed to the request handler.
    $map->get('path', '/path/{id}', new SomeOtherRequestHandler);

});

// Create an aura router middleware using this aura router.
$middleware = new AuraRouterMiddleware($router);

// When a route is matched the request is handled by the matched request handler.
// Otherwise NextRequestHandler is used to handle the request.
$response = $middleware->process($request, new NextRequestHandler);