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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpFoundation;
/**
* Response represents an HTTP response in JSON format.
*
* @author Igor Wiedler <igor@wiedler.ch>
*/
class JsonResponse extends Response
{
protected $data;
protected $callback;
/**
* Constructor.
*
* @param mixed $data The response data
* @param integer $status The response status code
* @param array $headers An array of response headers
*/
public function __construct($data = null, $status = 200, $headers = array())
{
parent::__construct('', $status, $headers);
if (null === $data) {
$data = new \ArrayObject();
}
$this->setData($data);
}
/**
* {@inheritDoc}
*/
public static function create($data = null, $status = 200, $headers = array())
{
return new static($data, $status, $headers);
}
/**
* Sets the JSONP callback.
*
* @param string $callback
*
* @return JsonResponse
*
* @throws \InvalidArgumentException
*/
public function setCallback($callback = null)
{
if (null !== $callback) {
// taken from http://www.geekality.net/2011/08/03/valid-javascript-identifier/
$pattern = '/^[$_\p{L}][$_\p{L}\p{Mn}\p{Mc}\p{Nd}\p{Pc}\x{200C}\x{200D}]*+$/u';
$parts = explode('.', $callback);
foreach ($parts as $part) {
if (!preg_match($pattern, $part)) {
throw new \InvalidArgumentException('The callback name is not valid.');
}
}
}
$this->callback = $callback;
return $this->update();
}
/**
* Sets the data to be sent as json.
*
* @param mixed $data
*
* @return JsonResponse
*/
public function setData($data = array())
{
// Encode <, >, ', &, and " for RFC4627-compliant JSON, which may also be embedded into HTML.
$this->data = json_encode($data, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_AMP | JSON_HEX_QUOT);
return $this->update();
}
/**
* Updates the content and headers according to the json data and callback.
*
* @return JsonResponse
*/
protected function update()
{
if (null !== $this->callback) {
// Not using application/javascript for compatibility reasons with older browsers.
$this->headers->set('Content-Type', 'text/javascript');
return $this->setContent(sprintf('%s(%s);', $this->callback, $this->data));
}
// Only set the header when there is none or when it equals 'text/javascript' (from a previous update with callback)
// in order to not overwrite a custom definition.
if (!$this->headers->has('Content-Type') || 'text/javascript' === $this->headers->get('Content-Type')) {
$this->headers->set('Content-Type', 'application/json');
}
return $this->setContent($this->data);
}
}
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