<?php
/*
* This file is part of the FOSRestBundle package.
*
* (c) FriendsOfSymfony <http://friendsofsymfony.github.com/>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace FOS\RestBundle\EventListener;
use FOS\RestBundle\FOSRestBundle;
use FOS\RestBundle\Util\StopFormatListenerException;
use FOS\RestBundle\Negotiation\FormatNegotiator;
use Symfony\Component\HttpKernel\Event\RequestEvent;
use Symfony\Component\HttpKernel\Exception\NotAcceptableHttpException;
use Symfony\Component\HttpKernel\HttpKernelInterface;
/**
* This listener handles Accept header format negotiations.
*
* @author Lukas Kahwe Smith <smith@pooteeweet.org>
*
* @internal
*/
class FormatListener
{
private $formatNegotiator;
/**
* Initialize FormatListener.
*
* @param FormatNegotiatorInterface $formatNegotiator
*/
public function __construct(FormatNegotiator $formatNegotiator)
{
$this->formatNegotiator = $formatNegotiator;
}
/**
* Determines and sets the Request format.
*
* @param RequestEvent $event The event
*
* @throws NotAcceptableHttpException
*/
public function onKernelRequest($event)
{
$request = $event->getRequest();
if (!$request->attributes->get(FOSRestBundle::ZONE_ATTRIBUTE, true)) {
return;
}
try {
$format = $request->getRequestFormat(null);
if (null === $format) {
$accept = $this->formatNegotiator->getBest('');
if (null !== $accept && 0.0 < $accept->getQuality()) {
$format = $request->getFormat($accept->getValue());
if (null !== $format) {
$request->attributes->set('media_type', $accept->getValue());
}
}
}
if (null === $format) {
if (HttpKernelInterface::MASTER_REQUEST === $event->getRequestType()) {
throw new NotAcceptableHttpException('No matching accepted Response format could be determined');
}
return;
}
$request->setRequestFormat($format);
} catch (StopFormatListenerException $e) {
// nothing to do
}
}
}