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yiisoft/middleware-dispatcher
=============================

PSR-15 middleware dispatcher

5.4.0(5mo ago)17369.2k—5.1%8[2 PRs](https://github.com/yiisoft/middleware-dispatcher/pulls)13BSD-3-ClausePHPPHP 8.1 - 8.5CI passing

Since Nov 8Pushed 3mo ago14 watchersCompare

[ Source](https://github.com/yiisoft/middleware-dispatcher)[ Packagist](https://packagist.org/packages/yiisoft/middleware-dispatcher)[ Docs](https://www.yiiframework.com/)[ GitHub Sponsors](https://github.com/sponsors/yiisoft)[ OpenCollective](https://opencollective.com/yiisoft)[ RSS](/packages/yiisoft-middleware-dispatcher/feed)WikiDiscussions master Synced 1mo ago

READMEChangelog (8)Dependencies (17)Versions (15)Used By (13)

 [ ![Yii](https://camo.githubusercontent.com/8317c17418b39410a660f5149071d26c5023c0d5fb2b7ebb771324812f666d73/68747470733a2f2f796969736f66742e6769746875622e696f2f646f63732f696d616765732f7969695f6c6f676f2e737667) ](https://github.com/yiisoft)

Yii Middleware Dispatcher
=========================

[](#yii-middleware-dispatcher)

[![Latest Stable Version](https://camo.githubusercontent.com/d0f9fae499ac3ce8e7fbd1e7ce582573ea9dadb2b1a126e53bbb7e5675de3dfa/68747470733a2f2f706f7365722e707567782e6f72672f796969736f66742f6d6964646c65776172652d646973706174636865722f76)](https://packagist.org/packages/yiisoft/middleware-dispatcher)[![Total Downloads](https://camo.githubusercontent.com/c0c89d955994938abdd12e9dc8c0580f67b1640d519a9f8c14e9469cfc5997e3/68747470733a2f2f706f7365722e707567782e6f72672f796969736f66742f6d6964646c65776172652d646973706174636865722f646f776e6c6f616473)](https://packagist.org/packages/yiisoft/middleware-dispatcher)[![Build status](https://github.com/yiisoft/middleware-dispatcher/actions/workflows/build.yml/badge.svg)](https://github.com/yiisoft/middleware-dispatcher/actions/workflows/build.yml)[![Code Coverage](https://camo.githubusercontent.com/98b7fcb846992f771950af89faa62236da27e2f39ae8f42f6b3c1389c6464484/68747470733a2f2f636f6465636f762e696f2f67682f796969736f66742f6d6964646c65776172652d646973706174636865722f6272616e63682f6d61737465722f67726170682f62616467652e737667)](https://codecov.io/gh/yiisoft/middleware-dispatcher)[![Mutation testing badge](https://camo.githubusercontent.com/bc012085dda60bdbdc23e95bec5ea52f55218e5065f19476f45d868861d994f1/68747470733a2f2f696d672e736869656c64732e696f2f656e64706f696e743f7374796c653d666c61742675726c3d687474707325334125324625324662616467652d6170692e737472796b65722d6d757461746f722e696f2532466769746875622e636f6d253246796969736f66742532466d6964646c65776172652d646973706174636865722532466d6173746572)](https://dashboard.stryker-mutator.io/reports/github.com/yiisoft/middleware-dispatcher/master)[![static analysis](https://github.com/yiisoft/middleware-dispatcher/workflows/static%20analysis/badge.svg)](https://github.com/yiisoft/middleware-dispatcher/actions?query=workflow%3A%22static+analysis%22)[![type-coverage](https://camo.githubusercontent.com/11fac90586b29fe090916ad57965b31151a92d1144ca62e2cfd53acf4fc159e2/68747470733a2f2f73686570686572642e6465762f6769746875622f796969736f66742f6d6964646c65776172652d646973706174636865722f636f7665726167652e737667)](https://shepherd.dev/github/yiisoft/middleware-dispatcher)[![psalm-level](https://camo.githubusercontent.com/dac811f4296e222225f08d4c1a26b67d11b53bb6af2db76019647f444919a7d4/68747470733a2f2f73686570686572642e6465762f6769746875622f796969736f66742f6d6964646c65776172652d646973706174636865722f6c6576656c2e737667)](https://shepherd.dev/github/yiisoft/middleware-dispatcher)

The package is a [PSR-15](https://www.php-fig.org/psr/psr-15/) middleware dispatcher. Given a set of middleware and a request instance, dispatcher executes it and produces a response instance.

Requirements
------------

[](#requirements)

- PHP 8.1 - 8.5.

Installation
------------

[](#installation)

The package could be installed with [Composer](https://getcomposer.org):

```
composer require yiisoft/middleware-dispatcher
```

General usage
-------------

[](#general-usage)

To use a dispatcher, you need to create it first:

```
use Yiisoft\Middleware\Dispatcher\MiddlewareDispatcher;
use Yiisoft\Middleware\Dispatcher\MiddlewareFactory;

$dispatcher = new MiddlewareDispatcher(
    new MiddlewareFactory($diContainer),
    $eventDispatcher
);
```

In the above `$diContainer` is an instance of [PSR-11](https://www.php-fig.org/psr/psr-11/) `\Psr\Container\ContainerInterface`and `$eventDispatcher` is an instance of [PSR-14](https://www.php-fig.org/psr/psr-14/) `Psr\EventDispatcher\EventDispatcherInterface`.

After dispatcher instance obtained, it should be fed with some middleware:

```
$dispatcher = $dispatcher->withMiddlewares([
    TeapotAccessChecker::class,
    static function (): ResponseInterface {
        return new Response(418);
    },
]);
```

In the above we have used a callback. Overall the following options are available:

- A controller handler action in format `[TestController::class, 'index']`. `TestController` instance will be created and `index()` method will be executed.
- A name of PSR-15 middleware class. The middleware instance will be obtained from container.
- A name of PSR-15 request handler class. The request handler instance will be obtained from container and executed.
- An identifier of container definition for PSR-15 middleware. The middleware instance will be obtained from container and executed.
- A name or instance of invokable class. If the name of invokable class is provided, the instance will be obtained from container and executed.
- A function returning a middleware such as

    ```
    static function (): MiddlewareInterface {
        return new TestMiddleware();
    }
    ```

    The middleware returned will be executed.
- A function returning a request handler such as

    ```
    static function (): RequestHandlerInterface {
        return new SimpleRequestHandler();
    }
    ```

    The request handler returned will be executed.
- A callback `function(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface`.
- An array definition (see [syntax](https://github.com/yiisoft/definitions#arraydefinition)) of middleware:

    ```
    [
        'class' => MyMiddleware::class,
        '__construct()' => [
            'someVar' => 42,
        ],
    ]
    ```

For handler action and callable typed parameters are automatically injected using dependency injection container. Current request and handler could be obtained by type-hinting for `ServerRequestInterface` and `RequestHandlerInterface`.

After middleware set is defined, you can do the dispatching:

```
$request = new ServerRequest('GET', '/teapot');
$response = $dispatcher->dispatch($request, $this->getRequestHandler());
```

Given a request dispatcher executes middleware in the set and produces response. First specified middleware will be executed first. For each middleware `\Yiisoft\Middleware\Dispatcher\Event\BeforeMiddleware` and `\Yiisoft\Middleware\Dispatcher\Event\AfterMiddleware`events are triggered.

### Creating your own implementation of parameters resolver

[](#creating-your-own-implementation-of-parameters-resolver)

Parameters resolver could be customized by providing your own `ParametersResolverInterface` implementation:

```
use \Psr\Http\Message\ServerRequestInterface;
use \Yiisoft\Middleware\Dispatcher\ParametersResolverInterface;

class CoolParametersResolver implements ParametersResolverInterface
{
    public function resolve(array $parameters, ServerRequestInterface $request): array
    {
        $resolvedParameters = [];
        foreach ($parameters as $name => $parameter) {
            if ($request->getAttribute($name) !== null) {
                $resolvedParameters[$name] = $request->getAttribute($name)
            }
        }

        return $resolvedParameters;
    }
}
```

Then it could be used like the following:

```
use Psr\Container\ContainerInterface;
use Yiisoft\Middleware\Dispatcher\MiddlewareDispatcher;
use Yiisoft\Middleware\Dispatcher\MiddlewareFactory;
use Yiisoft\Middleware\Dispatcher\ParametersResolverInterface;

/**
 * @var ContainerInterface $container
 * @var ParametersResolverInterface $resolver
 * @var EventDispatcherInterface $eventDispatcher
 */
$dispatcher = new MiddlewareDispatcher(new MiddlewareFactory($container, $resolver), $eventDispatcher);
```

To combine several parameters' resolvers use `CompositeParametersResolver`:

```
use Psr\Container\ContainerInterface;
use Psr\EventDispatcher\EventDispatcherInterface;
use Yiisoft\Middleware\Dispatcher\CompositeParametersResolver;
use Yiisoft\Middleware\Dispatcher\MiddlewareDispatcher;
use Yiisoft\Middleware\Dispatcher\MiddlewareFactory;
use Yiisoft\Middleware\Dispatcher\ParametersResolverInterface;

/**
 * @var ContainerInterface $container
 * @var ParametersResolverInterface $resolver1
 * @var ParametersResolverInterface $resolver2
 * @var EventDispatcherInterface $eventDispatcher
 */
$dispatcher = new MiddlewareDispatcher(
    new MiddlewareFactory($container, new CompositeParametersResolver($resolver1, $resolver2)),
    $eventDispatcher,
);
```

Documentation
-------------

[](#documentation)

- [Internals](docs/internals.md)

If you need help or have a question, the [Yii Forum](https://forum.yiiframework.com/c/yii-3-0/63) is a good place for that. You may also check out other [Yii Community Resources](https://www.yiiframework.com/community).

License
-------

[](#license)

The Yii Middleware Dispatcher is free software. It is released under the terms of the BSD License. Please see [`LICENSE`](./LICENSE.md) for more information.

Maintained by [Yii Software](https://www.yiiframework.com/).

Support the project
-------------------

[](#support-the-project)

[![Open Collective](https://camo.githubusercontent.com/a2b15f8e2268d4e3842e00d41ff7a57cce2ad8bd8d8769c5dc4fa05a546a4f62/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f4f70656e253230436f6c6c6563746976652d73706f6e736f722d3765616466313f6c6f676f3d6f70656e253230636f6c6c656374697665266c6f676f436f6c6f723d376561646631266c6162656c436f6c6f723d353535353535)](https://opencollective.com/yiisoft)

Follow updates
--------------

[](#follow-updates)

[![Official website](https://camo.githubusercontent.com/d6b0929173e28cc627430d2519ca1853466a70f37395877eaf4820cb3e1e1909/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f506f77657265645f62792d5969695f4672616d65776f726b2d677265656e2e7376673f7374796c653d666c6174)](https://www.yiiframework.com/)[![Twitter](https://camo.githubusercontent.com/d077c362ac639792171af8bc002ee827816733dfc0925f70b557e6d151022226/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f747769747465722d666f6c6c6f772d3144413146323f6c6f676f3d74776974746572266c6f676f436f6c6f723d314441314632266c6162656c436f6c6f723d3535353535353f7374796c653d666c6174)](https://twitter.com/yiiframework)[![Telegram](https://camo.githubusercontent.com/4e38dd12535575c39c65bea7119b95e663abb2d1f4e3d669a27bbda07ef603f0/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f74656c656772616d2d6a6f696e2d3144413146323f7374796c653d666c6174266c6f676f3d74656c656772616d)](https://t.me/yii3en)[![Facebook](https://camo.githubusercontent.com/48204e301b34b29b0815854544f04c337fc0692096cab35e9a1f8c53a42c2307/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f66616365626f6f6b2d6a6f696e2d3144413146323f7374796c653d666c6174266c6f676f3d66616365626f6f6b266c6f676f436f6c6f723d666666666666)](https://www.facebook.com/groups/yiitalk)[![Slack](https://camo.githubusercontent.com/1a3645ba1c97e6684d0349bc478201e1621ba0d3efad516d81035364d442bad7/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f736c61636b2d6a6f696e2d3144413146323f7374796c653d666c6174266c6f676f3d736c61636b)](https://yiiframework.com/go/slack)

###  Health Score

61

—

FairBetter than 99% of packages

Maintenance76

Regular maintenance activity

Popularity46

Moderate usage in the ecosystem

Community37

Small or concentrated contributor base

Maturity75

Established project with proven stability

 Bus Factor3

3 contributors hold 50%+ of commits

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Every ~149 days

Recently: every ~267 days

Total

11

Last Release

157d ago

Major Versions

1.0.0 → 2.0.02021-11-10

2.1.0 → 3.0.02022-09-07

3.0.0 → 4.0.02022-11-10

4.0.0 → 5.0.02023-01-09

PHP version history (4 changes)1.0.0PHP ^7.4|^8.0

4.0.0PHP ^8.0

5.3.0PHP 8.1 - 8.4

5.4.0PHP 8.1 - 8.5

### Community

Maintainers

![](https://www.gravatar.com/avatar/261a6249c6f605f3956a2fae40fbb813f6b2e1e6f2bf806180c851a965426e54?d=identicon)[cebe](/maintainers/cebe)

![](https://www.gravatar.com/avatar/fc29e4e7068a00fe9b9db37b8aadda1db6020adcacef810461e47b99c2b150e6?d=identicon)[samdark](/maintainers/samdark)

![](https://www.gravatar.com/avatar/ccb75e3312d6bd454ea445ea308139fd185a4ca906ca5df21cc66e6a35de25a3?d=identicon)[SilverFire](/maintainers/SilverFire)

![](https://www.gravatar.com/avatar/99106256c24a8cb23871b99fa90e48f37f1aa71608c185759b7d2a88683a5918?d=identicon)[hiqsol](/maintainers/hiqsol)

---

Top Contributors

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---

Tags

hacktoberfestmiddlewaremiddleware-dispatchersmiddleware-pipelinepsr-15yii3middlewaredispatcher

###  Code Quality

TestsPHPUnit

Static AnalysisPsalm, Rector

Type Coverage Yes

### Embed Badge

![Health badge](/badges/yiisoft-middleware-dispatcher/health.svg)

```
[![Health](https://phpackages.com/badges/yiisoft-middleware-dispatcher/health.svg)](https://phpackages.com/packages/yiisoft-middleware-dispatcher)
```

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