CaptchaBundle/Controller/CaptchaController.php

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<?php
namespace Gregwar\CaptchaBundle\Controller;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
/**
* Generates a captcha via a URL
*
* @author Jeremy Livingston <jeremy.j.livingston@gmail.com>
*/
class CaptchaController extends Controller
{
/**
* Action that is used to generate the captcha, save its code, and stream the image
*
* @param \Symfony\Component\HttpFoundation\Request $request
* @param string $key
*
* @return \Symfony\Component\HttpFoundation\Response
*/
public function generateCaptchaAction(Request $request, $key)
{
$options = $this->container->getParameter('gregwar_captcha.config');
$session = $this->get('session');
$whitelistKey = $options['whitelist_key'];
$isOk = false;
if ($options['as_url'] && $session->has($whitelistKey)) {
$keys = $session->get($whitelistKey);
if (is_array($keys) && in_array($key, $keys)) {
$isOk = true;
}
}
if (!$isOk) {
throw $this->createNotFoundException('Unable to generate a captcha via an URL with this session key.');
}
/* @var \Gregwar\CaptchaBundle\Generator\CaptchaGenerator $generator */
$generator = $this->container->get('gregwar_captcha.generator');
$response = new Response($generator->generate($key, $options));
$response->headers->set('Content-type', 'image/jpeg');
return $response;
}
}