Hawkbit

Hawkbit micro framework is a high customizable, event driven and compatible with PSR-7, StackPHP and Zend Stratigility.

Hawkbit uses latest versions of League\Route for routing, League\Container for dependency injection, League\Event for event dispatching, Zend Config for configuration.

Hawkbit is an advanced derivate of Proton and part of Hawkbit Component collection by Marco Bunge. Hawkbit 1.x is also known as Blast Hawkbit.

Integrations

Hawkbit delivers also optional packages:

• Database: hawkbit/database
• Doctrine ORM Wrapper: hawkbit/doctrine
• Plates View Engine: hawkbit/presentation

Install

Using Composer

Hawkbit is available on Packagist and can be installed using Composer. This can be done by running the following command or by updating your composer.json file.

composer require hawkbit/hawkbit

composer.json

{
    "require": {
        "hawkbit/hawkbit": "~2.0"
    }
}

Be sure to also include your Composer autoload file in your project:

<?php

require __DIR__ . '/vendor/autoload.php';

Downloading .zip file

This project is also available for download as a .zip file on GitHub. Visit the releases page, select the version you want, and click the "Source code (zip)" download button.

Requirements

The following versions of PHP are supported by this version.

• PHP 5.5
• PHP 5.6
• PHP 7.0
• HHVM

Setup

Create a new app

<?php

require __DIR__.'/../vendor/autoload.php';

$app = new \Hawkbit\Application();

Create a new app with configuration

<?php

$config = [
    'key' => 'value'
];
$app = new \Hawkbit\Application($config);

Add routes

<?php

/** @var Hawkbit\Application $app */
$app->get('/', function ($request, $response) {
    $response->getBody()->write('<h1>It works!</h1>');
    return $response;
});

$app->get('/hello/{name}', function ($request, $response, $args) {
    $response->getBody()->write(
        sprintf('<h1>Hello, %s!</h1>', $args['name'])
    );
    return $response;
});

Run application

<?php

$app->run();

See also our example at /public/index.php.

Configuration

Add additional configuration to application

Hawkbit Configuration is managed by zend-config.

<?php

//add many values
$app->setConfig([
    'database' => [
        'default' => 'mysql://root:root@localhost/acmedb',
    ],
    'services' => [
        'Acme\Services\ViewProvider',
    ]
]);

//add a single value
$app->setConfig('baseurl', 'localhost/');

$app->getConfig()->baseurl = 'localhost/';
$app->getConfig()['baseurl'] = 'localhost/';

Access configuration

<?php

//access all configuration
$app->getConfig();

//get configuration item
$default = $app->getConfig('database')->default; // returns 'mysql://root:root@localhost/acmedb
$default = $app->getConfig()->database->default; // returns 'mysql://root:root@localhost/acmedb
$default = $app->getConfig('database')['default']; // returns 'mysql://root:root@localhost/acmedb
$default = $app->getConfig()['database']['default']; // returns 'mysql://root:root@localhost/acmedb

Middlewares

Hawkbit middlewares allows advanced control of lifecycle execution.

<?php

$app->addMiddleware(new Acme\SomeMiddleware);

Hawkbit uses it's own runner Hawkbit\Application\MiddelwareRunner

Routing

Hawkbit uses routing integration of league/route and allows access to route collection methods directly.

Basic usage with anonymous functions:

<?php
// index.php

$app->get('/', function ($request, $response) {
    $response->getBody()->write('<h1>It works!</h1>');
    return $response;
});

$app->get('/hello/{name}', function ($request, $response, $args) {
    $response->getBody()->write(
        sprintf('<h1>Hello, %s!</h1>', $args['name'])
    );
    return $response;
});

$app->run();

Access app from anonymous function

Hawkbit allows to access Hawkbit\Application from anonymous function through closure binding.

<?php

$app->get('/hello/{name}', function ($request, $response, $args) {
    
    // access Hawkbit\Application
    $app = $this;
    
    $response->getBody()->write(
        sprintf('<h1>Hello, %s!</h1>', $args['name'])
    );
    return $response;
});

Basic usage with controllers:

<?php

require __DIR__.'/../vendor/autoload.php';

$app = new Hawkbit\Application();

$app->get('/', 'HomeController::index'); // calls index method on HomeController class

$app->run();

<?php

// HomeController.php

use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\ResponseInterface;

class HomeController
{
    public function index(ServerRequestInterface $request, ResponseInterface $response, array $args)
    {
        $response->getBody()->write('<h1>It works!</h1>');
        return $response;
    }
}

Automatic constructor injection of controllers:

<?php

// index.php

require __DIR__.'/../vendor/autoload.php';

$app = new Hawkbit\Application();

$app->getContainer()->add('CustomService', new CustomService);
$app->get('/', 'HomeController::index'); // calls index method on HomeController class

$app->run();

<?php

// HomeController.php

use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\ResponseInterface;

class HomeController
{
    /**
     * @var CustomService
     */
    private $service;

    /**
     * @param CustomService $application
     */
    public function __construct(CustomService $service = null)
    {
        $this->service = $service;
    }

    /**
     * @return CustomService
     */
    public function getService()
    {
        return $this->service;
    }
    
    public function index(ServerRequestInterface $request, ResponseInterface $response, array $args)
    {
        //do somehing with service
        $service = $this->getService();
        return $response;
    }
}

For more information about routes read this guide

Route groups

Hawkbit add support for route groups.

<?php

$app->group('/admin', function (\League\Route\RouteGroup $route) {

    //access app container (or any other method!)
    $app = $this;
    
    $route->map('GET', '/acme/route1', 'AcmeController::actionOne');
    $route->map('GET', '/acme/route2', 'AcmeController::actionTwo');
    $route->map('GET', '/acme/route3', 'AcmeController::actionThree');
});

Available vars

• $route - \League\Route\RouteGroup
• $this - \Hawkbit\Application

Middleware integrations

StackPHP

Basic usage with StackPHP (using Stack\Builder and Stack\Run):

<?php

// index.php
require __DIR__.'/../vendor/autoload.php';

$app = new Hawkbit\Application();

$app->get('/', function ($request, $response) {
    $response->setContent('<h1>Hello World</h1>');
    return $response;
});

$httpKernel = new Hawkbit\Symfony\HttpKernelAdapter($app);

$stack = (new \Stack\Builder())
    ->push('Some/MiddleWare') // This will execute first
    ->push('Some/MiddleWare') // This will execute second
    ->push('Some/MiddleWare'); // This will execute third

$app = $stack->resolve($httpKernel);
\Stack\run($httpKernel); // The app will run after all the middlewares have run

Zend Stratigility

Basic usage with Stratigility (using Zend\Stratigility\MiddlewarePipe):

<?php

use Psr\Http\Message\ResponseInterface;
use Zend\Diactoros\ServerRequestFactory;
use Hawkbit\Application;
use Hawkbit\Stratigility\MiddlewarePipeAdapter;

$application = new Application();
$application->get('/', function($request, ResponseInterface $response){
    $response->getBody()->write('Hello World');
});
$middleware = new MiddlewarePipeAdapter($application);

//wrap html heading
$middleware->pipe('/', function($request, ResponseInterface $response, $next){
    $response->getBody()->write('<h1>');

    /** @var ResponseInterface $response */
    $response = $next($request, $response);

    $response->getBody()->write('</h1>');
});

/** @var ResponseInterface $response */
$response = $middleware(ServerRequestFactory::fromGlobals(), $application->getResponse());

echo $response->getBody(); //prints <h1>Hello World</h1>

Error handling

Hawkbit uses Whoops error handling framework and determines the error handler by request content type.

Set your own handler:

<?php

$app->getErrorHandler()->push(new Acme\ErrorResponseHandler);

By default Hawkbit runs with error options disabled. To enable debugging add

<?php

$app->setConfig('error', true);

By default Hawkbit is catching all errors. To disable error catching add

<?php

$app->setConfig('error.catch', false);

Logging

Hawkbit has built in support for Monolog. To access a channel call:

<?php

$app->getLogger('channel name');

For more information about channels read this guide - https://github.com/Seldaek/monolog/blob/master/doc/usage.md#leveraging-channels.

Events

You can intercept requests and responses at seven points during the lifecycle. You can manipulate Request, Response and ErrorResponse via Hawkbit\ApplicationEvent.

Application event

<?php

/** @var \Hawkbit\Application\ApplicationEvent $event */

// custom params
$event->getParamCollection(); // returns a mutable \ArrayObject

// access application
$event->getApplication();

request.received

<?php

$app->addListener($app::EVENT_REQUEST_RECEIVED, function (\Hawkbit\Application\ApplicationEvent $event) {
    $request = $event->getRequest();
    
    // manipulate $request
    
    $event->setRequest($request);
});

This event is fired when a request is received but before it has been processed by the router.

response.created

<?php

$app->addListener($app::EVENT_RESPONSE_CREATED, function (\Hawkbit\Application\ApplicationEvent $event) {
    $request = $event->getRequest();
    $response = $event->getResponse();
        
    // manipulate request or response
    
    $event->setRequest($request);
    $event->setResponse($response);
});

This event is fired when a response has been created but before it has been output.

response.sent

<?php

$app->addListener($app::EVENT_RESPONSE_SENT, function (\Hawkbit\Application\ApplicationEvent $event) {
    $request = $event->getRequest();
    $response = $event->getResponse();
    
    // manipulate request or response
    
    $event->setRequest($request);
    $event->setResponse($response);
});

This event is fired when a response has been output and before the application lifecycle is completed.

runtime.error

<?php

$app->addListener($app::EVENT_RUNTIME_ERROR, function (\Hawkbit\Application\ApplicationEvent $event, $exception) use ($app) {
    //process exception
});

This event is always fired when an error occurs.

lifecycle.error

$errorResponse is used as default response

<?php

$app->addListener($app::EVENT_LIFECYCLE_ERROR, function (\Hawkbit\Application\ApplicationEvent $event, \Exception $exception) {
    $errorResponse = $event->getErrorResponse();
 
    //manipulate error response and process exception
        
    $event->setErrorResponse($errorResponse);
});

This event is fired only when an error occurs while handling request/response lifecycle. This event is fired after runtime.error

lifecycle.complete

<?php

$app->addListener($app::EVENT_LIFECYCLE_COMPLETE, function (\Hawkbit\Application\ApplicationEvent $event) {
    // access the request using $event->getRequest()
    // access the response using $event->getResponse()
});

This event is fired when a response has been output and before the application lifecycle is completed.

shutdown

<?php

$app->addListener($app::EVENT_SHUTDOWN, function (\Hawkbit\Application\ApplicationEvent $event, $response, $terminatedOutputBuffers = []) {
    // access the response using $event->getResponse()
    // access terminated output buffer contents
    // or force application exit()
});

This event is always fired after each operation is completed or failed.

Custom Events

You can fire custom events using the event emitter directly:

<?php

// addListener
$app->addListener('custom.event', function ($event, $time) {
    return 'the time is '.$time;
});

// or with class addListener
$app->addListener(Acme\Event::class, function (Acme\Event $event, $time) {
    return 'the time is '.$time;
});

// Publish
$app->getEventEmitter()->emit('custom.event', time());

Dependency Injection Container

Hawkbit uses League/Container as its dependency injection container.

You can bind singleton objects into the container from the main application object using ArrayAccess:

<?php
/** @var Hawkbit\Application $app */
$app['db'] = function () use($app) {
    $config = $app->getConfig('database');
    $manager = new Illuminate\Database\Capsule\Manager;

    $manager->addConnection([
        'driver'    => 'mysql',
        'host'      => $config['host'],
        'database'  => $config['name'],
        'username'  => $config['user'],
        'password'  => $config['pass'],
        'charset'   => 'utf8',
        'collation' => 'utf8_unicode_ci'
    ], 'default');

    $manager->setAsGlobal();

    return $manager;
};

or by container access:

<?php
/** @var Hawkbit\Application $app */
$app->getContainer()->share('db', function () use($app) {
    $config = $app->getConfig('database');
    $manager = new Illuminate\Database\Capsule\Manager;

    $manager->addConnection([
        'driver'    => 'mysql',
        'host'      => $config['db_host'],
        'database'  => $config['db_name'],
        'username'  => $config['db_user'],
        'password'  => $config['db_pass'],
        'charset'   => 'utf8',
        'collation' => 'utf8_unicode_ci'
    ], 'default');

    $manager->setAsGlobal();

    return $manager;
});

Multitons can be added using the add method on the container:

<?php

//callback
$app->getContainer()->add('foo', function () {
    return new Foo();
});

Service providers can be registered using the register method on the Hawkbit app or addServiceProvider on the container:

<?php

$app->register('\My\Service\Provider');
$app->getContainer()->addServiceProvider('\My\Service\Provider');

For more information about service providers check out this page - http://container.thephpleague.com/service-providers/.

For easy testing down the road it is recommended you embrace constructor injection:

<?php

$app->getContainer()->add('Bar', function () {
        return new Bar();
});

$app->getContainer()->add('Foo', function () use ($app) {
        return new Foo(
            $app->getContainer()->get('Bar')
        );
});

Container

Set your own container needs an instance of \League\Container\ContainerInterface

<?php

$app->setContainer($container);

Get container

<?php

$app->getContainer();

Services

Hawkbit uses dependency injection container to access services. Following integrations can be exchanged.

Configurator

Uses in Application::setConfig(),Application::getConfig() and Application::hasConfig()

<?php

$app->getConfigurator();

<?php

$app->getContainer()->share(\Zend\Config\Config::class, new \Zend\Config\Config([], true));

error handler

<?php

$app->getContainer()->share(\Whoops\Run::class, new \Whoops\Run());

<?php

$app->getErrorHandler();

error response handler

<?php

$app->getContainer()->share(\Whoops\Handler\HandlerInterface::class, Acme\ErrorResponseHandler::class);

<?php

$app->getErrorResponseHandler();

psr logger

Get a new logger instance by channel name

<?php

$app->getContainer()->add(\Psr\Log\LoggerInterface::class, \Monolog\Logger::class);

<?php

$app->getLogger('channel name');

Get a list of available logger channels

<?php

$app->getLoggerChannels();

psr server request

<?php

$app->getContainer()->share(\Psr\Http\Message\ServerRequestInterface::class, \Zend\Diactoros\ServerRequestFactory::fromGlobals());

<?php

$app->getRequest();

psr response

<?php

$app->getContainer()->add(\Psr\Http\Message\ResponseInterface::class, \Zend\Diactoros\Response::class);

<?php

$app->getRequest();

response emitter

<?php

$app->getContainer()->share(\Zend\Diactoros\Response\EmitterInterface::class, \Zend\Diactoros\Response\SapiEmitter::class);

<?php

$app->getResponseEmitter();

Change log

Please see CHANGELOG for more information what has changed recently.

Testing

$ composer test

Contributing

Please see CONTRIBUTING for details.

Security

If you discover any security related issues, please email mjls@web.de instead of using the issue tracker.

Credits

• Marco Bunge
• Alex Bilbie (Proton)
• All contributors

License

The MIT License (MIT). Please see License File for more information.