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<?php |
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declare(strict_types=1); |
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/* For licensing terms, see /license.txt */ |
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namespace Chamilo\PluginBundle\XApi\Lrs; |
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use Chamilo\CoreBundle\Entity\XApiLrsAuth; |
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use Database; |
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use Exception; |
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use Symfony\Component\HttpFoundation\Request as HttpRequest; |
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use Symfony\Component\HttpFoundation\Response as HttpResponse; |
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use Symfony\Component\HttpKernel\Exception\BadRequestHttpException; |
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use Symfony\Component\HttpKernel\Exception\HttpException; |
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use Symfony\Component\HttpKernel\Exception\NotFoundHttpException; |
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use Xabbuh\XApi\Common\Exception\AccessDeniedException; |
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use Xabbuh\XApi\Common\Exception\XApiException; |
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/** |
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* Class LrsRequest. |
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*/ |
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class LrsRequest |
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{ |
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/** |
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* @var HttpRequest |
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*/ |
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private $request; |
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public function __construct() |
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{ |
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$this->request = HttpRequest::createFromGlobals(); |
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} |
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public function send(): void |
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{ |
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try { |
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$this->alternateRequestSyntax(); |
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$controllerName = $this->getControllerName(); |
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$methodName = $this->getMethodName(); |
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$response = $this->generateResponse($controllerName, $methodName); |
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} catch (XApiException $xApiException) { |
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$response = HttpResponse::create('', HttpResponse::HTTP_BAD_REQUEST); |
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} catch (HttpException $httpException) { |
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$response = HttpResponse::create( |
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$httpException->getMessage(), |
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$httpException->getStatusCode() |
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); |
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} catch (Exception $exception) { |
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$response = HttpResponse::create($exception->getMessage(), HttpResponse::HTTP_BAD_REQUEST); |
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} |
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$response->headers->set('X-Experience-API-Version', '1.0.3'); |
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$response->send(); |
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} |
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/** |
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* @throws AccessDeniedException |
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*/ |
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private function validateAuth(): bool |
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{ |
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if (!$this->request->headers->has('Authorization')) { |
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throw new AccessDeniedException(); |
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} |
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$authHeader = $this->request->headers->get('Authorization'); |
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$parts = explode('Basic ', $authHeader, 2); |
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if (empty($parts[1])) { |
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throw new AccessDeniedException(); |
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} |
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$authDecoded = base64_decode($parts[1]); |
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$parts = explode(':', $authDecoded, 2); |
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if (empty($parts) || 2 !== \count($parts)) { |
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throw new AccessDeniedException(); |
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} |
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list($username, $password) = $parts; |
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$auth = Database::getManager() |
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->getRepository(XApiLrsAuth::class) |
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->findOneBy( |
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['username' => $username, 'password' => $password, 'enabled' => true] |
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) |
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; |
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if (null == $auth) { |
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throw new AccessDeniedException(); |
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} |
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return true; |
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} |
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private function validateVersion(): void |
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{ |
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$version = $this->request->headers->get('X-Experience-API-Version'); |
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if (null === $version) { |
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throw new BadRequestHttpException('The "X-Experience-API-Version" header is required.'); |
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} |
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if (preg_match('/^1\.0(?:\.\d+)?$/', $version)) { |
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if ('1.0' === $version) { |
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$this->request->headers->set('X-Experience-API-Version', '1.0.0'); |
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} |
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return; |
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} |
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throw new BadRequestHttpException("The xAPI version \"$version\" is not supported."); |
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} |
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private function getControllerName(): ?string |
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{ |
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$segments = explode('/', $this->request->getPathInfo()); |
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$segments = array_filter($segments); |
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$segments = array_values($segments); |
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if (empty($segments)) { |
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throw new BadRequestHttpException('Bad request'); |
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} |
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$segments = array_map('ucfirst', $segments); |
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$controllerName = implode('', $segments).'Controller'; |
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return "Chamilo\\PluginBundle\\XApi\\Lrs\\$controllerName"; |
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} |
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private function getMethodName(): string |
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{ |
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$method = $this->request->getMethod(); |
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return strtolower($method); |
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} |
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/** |
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* @throws AccessDeniedException |
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*/ |
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private function generateResponse(string $controllerName, string $methodName): HttpResponse |
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{ |
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if (!class_exists($controllerName) |
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|| !method_exists($controllerName, $methodName) |
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) { |
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throw new NotFoundHttpException(); |
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} |
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if (AboutController::class !== $controllerName) { |
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$this->validateAuth(); |
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$this->validateVersion(); |
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} |
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/** @var HttpResponse $response */ |
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return \call_user_func( |
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[ |
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new $controllerName($this->request), |
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$methodName, |
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] |
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); |
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} |
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private function alternateRequestSyntax(): void |
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{ |
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if ('POST' !== $this->request->getMethod()) { |
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return; |
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} |
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if (null === $method = $this->request->query->get('method')) { |
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return; |
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} |
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if ($this->request->query->count() > 1) { |
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throw new BadRequestHttpException('Including other query parameters than "method" is not allowed. You have to send them as POST parameters inside the request body.'); |
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} |
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$this->request->setMethod($method); |
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$this->request->query->remove('method'); |
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if (null !== $content = $this->request->request->get('content')) { |
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$this->request->request->remove('content'); |
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$this->request->initialize( |
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$this->request->query->all(), |
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$this->request->request->all(), |
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$this->request->attributes->all(), |
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$this->request->cookies->all(), |
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$this->request->files->all(), |
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$this->request->server->all(), |
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$content |
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); |
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} |
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$headerNames = [ |
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'Authorization', |
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'X-Experience-API-Version', |
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'Content-Type', |
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'Content-Length', |
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'If-Match', |
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'If-None-Match', |
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]; |
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foreach ($this->request->request as $key => $value) { |
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if (\in_array($key, $headerNames, true)) { |
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$this->request->headers->set($key, $value); |
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} else { |
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$this->request->query->set($key, $value); |
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} |
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$this->request->request->remove($key); |
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} |
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} |
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} |
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chamilo /
chamilo-lms
