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🍤 Caridea is a miniscule PHP application library. This is a shrimpy middleware dispatcher library.

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caridea-dispatch

Caridea is a miniscule PHP application library. This shrimpy fellow is what you'd use when you just want some helping hands and not a full-blown framework.

This is its PSR-7 and PSR-15 compliant request handler, with a few middleware implementations.

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Installation

You can install this library using Composer:

$ composer require caridea/dispatch
  • The master branch (version 3.x) of this project requires PHP 7.1 and depends on psr/http-message, psr/http-server-handler, and psr/http-server-middleware.

Compliance

Releases of this library will conform to Semantic Versioning.

Our code is intended to comply with PSR-1, PSR-2, and PSR-4. If you find any issues related to standards compliance, please send a pull request!

Documentation

Examples

Just a few quick examples.

Runner

You can use the Runner to give it some middleware and let it handle your request.

$request = new \Zend\Diactoros\ServerRequest();
// I generally use zend-diactoros, but feel free to use whatever PSR-7 library you use

$middleware = [
    // your custom \Psr\Http\Server\MiddlewareInterface objects
];
$runner = new \Caridea\Dispatch\Runner($middleware);
$response = $runner->handle($request);

Your final middleware should create and return a PSR-7 ResponseInterface. You can also provide one to the Runner constructor and it handles it automatically.

$response = new \Zend\Diactoros\Response();
$runner = new \Caridea\Dispatch\Runner($middleware, $response);
$response = $runner->handle($request);

A Runner is immutable. You can use it more than once.

$runner = new \Caridea\Dispatch\Runner($middleware);
$response1 = $runner->handle($request);
$response2 = $runner->handle($request);

Priority Runner

We included an extension of the MiddlewareInterface: Caridea\Dispatch\Middleware\Prioritized. Using the Caridea\Dispatch\PriorityRunner, you can provide middleware out of order, and they get invoked in order of priority.

$middleware = [
    // your custom \Psr\Http\Server\MiddlewareInterface objects.
    // Any that implement Prioritized will get run in priority order,
    // Any others get run last, in insert order.
];
$runner = new \Caridea\Dispatch\PriorityRunner($middleware);

You can also use the Caridea\Dispatch\Middleware\PriorityDelegate class to assign priority to an existing middleware implementation.

$middleware = new \Caridea\Dispatch\Middleware\PriorityDelegate($middleware, 123456);

Middleware

Middleware implementations we include.

Reporter

Use the Caridea\Dispatch\Middleware\Reporter to capture Throwables, log them, and re-throw the exception. PSR-3 required.

Prototype

A simple middleware that returns a ResponseInterface you provide.

See Also

  • This blog post from Matthew Weier O'Phinney about why PSR-15 ditched the old pattern of "double pass" middleware with anonymous functions.

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🍤 Caridea is a miniscule PHP application library. This is a shrimpy middleware dispatcher library.

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