CaptchaBundle/Controller/CaptchaController.php

84 lines
2.5 KiB
PHP

<?php
namespace Gregwar\CaptchaBundle\Controller;
use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
/**
* Generates a captcha via a URL
*
* @author Jeremy Livingston <jeremy.j.livingston@gmail.com>
*/
class CaptchaController extends AbstractController
{
/**
* Action that is used to generate the captcha, save its code, and stream the image
*
* @param string $key
*
* @return Response
*
* @throws NotFoundHttpException
*/
public function generateCaptchaAction($key)
{
$options = $this->container->getParameter('gregwar_captcha.config');
$session = $this->get('session');
$whitelistKey = $options['whitelist_key'];
$isOk = false;
if ($session->has($whitelistKey)) {
$keys = $session->get($whitelistKey);
if (is_array($keys) && in_array($key, $keys)) {
$isOk = true;
}
}
if (!$isOk) {
return $this->error($options);
}
/* @var \Gregwar\CaptchaBundle\Generator\CaptchaGenerator $generator */
$generator = $this->container->get('gregwar_captcha.generator');
$persistedOptions = $session->get($key, array());
$options = array_merge($options, $persistedOptions);
$phrase = $generator->getPhrase($options);
$generator->setPhrase($phrase);
$persistedOptions['phrase'] = $phrase;
$session->set($key, $persistedOptions);
$response = new Response($generator->generate($options));
$response->headers->set('Content-type', 'image/jpeg');
$response->headers->set('Pragma', 'no-cache');
$response->headers->set('Cache-Control', 'no-cache');
return $response;
}
/**
* Returns an empty image with status code 428 Precondition Required
*
* @param array $options
*
* @return Response
*/
protected function error($options)
{
/* @var \Gregwar\CaptchaBundle\Generator\CaptchaGenerator $generator */
$generator = $this->container->get('gregwar_captcha.generator');
$generator->setPhrase('');
$response = new Response($generator->generate($options));
$response->setStatusCode(428);
$response->headers->set('Content-type', 'image/jpeg');
$response->headers->set('Pragma', 'no-cache');
$response->headers->set('Cache-Control', 'no-cache');
return $response;
}
}