<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Json

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Http.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/**

 * @see Zend_Json_Server_Response

 */

require_once 'Zend/Json/Server/Response.php';

/**

 * @category   Zend

 * @package    Zend_Json

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Json_Server_Response_Http extends Zend_Json_Server_Response

{

    /**

     * Emit JSON

     *

     * Send appropriate HTTP headers. If no Id, then return an empty string.

     *

     * @return string

     */

    public function toJson()

    {

        $this->sendHeaders();

        if (!$this->isError() && null === $this->getId()) {

            return '';

        }

        return parent::toJson();

    }

    /**

     * Send headers

     *

     * If headers are already sent, do nothing. If null ID, send HTTP 204

     * header. Otherwise, send content type header based on content type of

     * service map.

     *

     * @return void

     */

    public function sendHeaders()

    {

        if (headers_sent()) {

            return;

        }

        if (!$this->isError() && (null === $this->getId())) {

            header('HTTP/1.1 204 No Content');

            return;

        }

        if (null === ($smd = $this->getServiceMap())) {

            return;

        }

        $contentType = $smd->getContentType();

        if (!empty($contentType)) {

            header('Content-Type: ' . $contentType);

        }

    }

}