vendor/symfony/http-foundation/JsonResponse.php

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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.
 *
 * Note that this class does not force the returned JSON content to be an
 * object. It is however recommended that you do return an object as it
 * protects yourself against XSSI and JSON-JavaScript Hijacking.
 *
 * @see https://github.com/OWASP/CheatSheetSeries/blob/master/cheatsheets/AJAX_Security_Cheat_Sheet.md#always-return-json-with-an-object-on-the-outside
 *
 * @author Igor Wiedler <igor@wiedler.ch>
 */
class JsonResponse extends Response
{
    protected $data;
    protected $callback;

    // Encode <, >, ', &, and " characters in the JSON, making it also safe to be embedded into HTML.
    // 15 === JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_AMP | JSON_HEX_QUOT
    public const DEFAULT_ENCODING_OPTIONS = 15;

    protected $encodingOptions = self::DEFAULT_ENCODING_OPTIONS;

    /**
     * @param mixed $data    The response data
     * @param int   $status  The response status code
     * @param array $headers An array of response headers
     * @param bool  $json    If the data is already a JSON string
     */
    public function __construct($data = null, int $status = 200, array $headers = [], bool $json = false)
    {
        parent::__construct('', $status, $headers);

        if ($json && !\is_string($data) && !is_numeric($data) && !\is_callable([$data, '__toString'])) {
            throw new \TypeError(sprintf('"%s": If $json is set to true, argument $data must be a string or object implementing __toString(), "%s" given.', __METHOD__, get_debug_type($data)));
        }

        if (null === $data) {
            $data = new \ArrayObject();
        }

        $json ? $this->setJson($data) : $this->setData($data);
    }

    /**
     * Factory method for chainability.
     *
     * Example:
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