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   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\HttpKernel\Exception;
  13  
  14  /**
  15   * @author Ben Ramsey <ben@benramsey.com>
  16   */
  17  class ServiceUnavailableHttpException extends HttpException
  18  {
  19      /**
  20       * @param int|string $retryAfter The number of seconds or HTTP-date after which the request may be retried
  21       * @param string     $message    The internal exception message
  22       * @param \Exception $previous   The previous exception
  23       * @param int        $code       The internal exception code
  24       */
  25      public function __construct($retryAfter = null, $message = null, \Exception $previous = null, $code = 0)
  26      {
  27          $headers = array();
  28          if ($retryAfter) {
  29              $headers = array('Retry-After' => $retryAfter);
  30          }
  31  
  32          parent::__construct(503, $message, $previous, $headers, $code);
  33      }
  34  }