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JsonResponse.php
<?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://www.owasp.org/index.php/OWASP_AJAX_Security_Guidelines#Always_return_JSON_with_an_Object_on_the_outside * * @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|null $callback The JSONP callback or null to use none * * @return JsonResponse * * @throws \InvalidArgumentException When the callback name is not valid */ public function setCallback($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 $data * * @return JsonResponse * * @throws \InvalidArgumentException */ public function setData($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); if (JSON_ERROR_NONE !== json_last_error()) { throw new \InvalidArgumentException($this->transformJsonError()); } 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); } private function transformJsonError() { if (function_exists('json_last_error_msg')) { return json_last_error_msg(); } switch (json_last_error()) { case JSON_ERROR_DEPTH: return 'Maximum stack depth exceeded.'; case JSON_ERROR_STATE_MISMATCH: return 'Underflow or the modes mismatch.'; case JSON_ERROR_CTRL_CHAR: return 'Unexpected control character found.'; case JSON_ERROR_SYNTAX: return 'Syntax error, malformed JSON.'; case JSON_ERROR_UTF8: return 'Malformed UTF-8 characters, possibly incorrectly encoded.'; default: return 'Unknown error.'; } } }
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