Swagger controller provider

SwaggerControllerProvider.php

<?php

namespace SimpleSwagger;

use Silex\Application;
use Silex\Api\ControllerProviderInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;

class SwaggerControllerProvider implements ControllerProviderInterface
{
    protected $className;

    public function __construct($className)
    {
        $this->className = $className;
        $reflection = new \ReflectionClass($this->className);
        $this->basePath = $reflection->getFileName();
    }

    public function connect(Application $app)
    {
        $this->config = new \Basster\Silex\Provider\Swagger\SwaggerConfig($this->basePath);
        $this->service = new \Basster\Silex\Provider\Swagger\SwaggerService($this->config);

        $controllers = $app['controllers_factory'];

        $controllers->get(
            '/swagger.json',
            [$this, 'getSwaggerResponse']
        );
        $swagger = json_decode((string) $this->service->getSwagger());
        foreach ($swagger->paths as $path => $pathInfo) {
            foreach ($pathInfo as $method => $methodInfo) {
                $controllers->match(
                    $path,
                    $this->className . '::' . $methodInfo->operationId
                )->method(strtoupper($method));
            }
        }
        return $controllers;
    }

    /**
     * @param \Symfony\Component\HttpFoundation\Request $request
     *
     * @return \Symfony\Component\HttpFoundation\Response
     * @throws \InvalidArgumentException
     */
    public function getSwaggerResponse(Request $request, $_route, Application $app)
    {
        $url = $_SERVER['REQUEST_URI'];
        $part = '/swagger.json';
        if (substr($url, -strlen($part)) != $part) {
            return $app->abort(500);
        }
        $basePath = substr($url, 0, -strlen($part));

        $swagger = json_decode((string) $this->service->getSwagger());

        $swagger->host = $_SERVER['HTTP_HOST'];
        $swagger->basePath = $basePath;
        $output = json_encode($swagger);
        $response = Response::create(
          $output,
          Response::HTTP_OK,
          ['Content-Type' => 'application/json']
        );
        #$response->setCache($this->cacheConfig);
        $response->setEtag(md5($output));
        $response->isNotModified($request);

        return $response;
    }

}