HttpKernel integration with AiP

HttpKernelInterfaceApplication.php

<?php
namespace Midgard\AppServerBundle\AiP;

use Symfony\Component\HttpKernel\HttpKernelInterface;
use Symfony\Component\HttpFoundation\Request;

class Application
{
    /**
     * @var Symfony\Component\HttpKernel\HttpKernelInterface
     */
    private $kernel;

    private $prefix;

    /**
     * Construct prepares the AppServer in PHP URL mappings
     * and is run once. It also loads the Symfony Application kernel
     */
    public function __construct(HttpKernelInterface $kernel, $prefix)
    {
        $this->kernel = $kernel;
        $this->prefix = $prefix;
    }

    /**
     * Invoke is run once per each request. Here we generate a
     * Request object, tell Symfony2 to handle it, and eventually
     * return the Result contents back to AiP
     */
    public function __invoke($context)
    {
        // Prepare Request object
        $request = $this->ctx2Request($context);
        $response = $this->kernel->handle($request);

        foreach ($response->headers->getCookies() as $cookie) {
            $context['_COOKIE']->setcookie($cookie->getName(), $cookie->getValue(), $cookie->getExpiresTime(), $cookie->getPath(), $cookie->getDomain(), $cookie->isSecure(), $cookie->isHttpOnly());
        }

        return array($response->getStatusCode(), $this->getHeaders($response), $response->getContent());
    }

    private function ctx2Request($context)
    {
        $requestUri = $context['env']['REQUEST_URI'];
        $_SERVER = $context['env'];

        $uriParts = explode('?', $requestUri);
        $_SERVER['PHP_SELF'] = $uriParts[0];
        $_SERVER['SCRIPT_FILENAME'] = "/some/path{$this->prefix}";

        if (isset($context['_GET'])) {
            $_GET = $context['_GET'];
        }
        if (isset($context['_POST'])) {
            $_POST = $context['_POST'];
        }
        if (isset($context['_FILES'])) {
            $_FILES = $context['_FILES'];
        }
        $_COOKIE = $context['_COOKIE']->__toArray();

        return Request::createFromGlobals();
    }

    /**
     * Normalize headers from a Symfony2 Response ParameterBag
     * to the array used by AiP
     */
    private function getHeaders($response)
    {
        $ret = array();
        $headers = $response->headers->all();
        foreach ($headers as $header => $values) {
            $ret[] = $header;
            $ret[] = implode(';', $values);
        }

        return $ret;
    }
}

silex.php

<?php

use Midgard\AppServerBundle\AiP\HttpKernelInterfaceApplication;

$app = require my_app.php; // Getting the Silex\Application instance with the recommended way to write them.

$aipApp = new HttpKernelInterfaceApplication($app);

// Do something to run this application

symfony.php

<?php

require_once __DIR__.'/../vendor/symfony/src/Symfony/Component/ClassLoader/UniversalClassLoader.php';
require_once __DIR__.'/autoload.php';
require_once __DIR__.'/AppKernel.php';

use Midgard\AppServerBundle\AiP\HttpKernelInterfaceApplication;

$aipApp = new HttpKernelInterfaceApplication($new AppKernel('prod', false));

// Do something to run this application