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 <?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_Oauth
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /** Zend_Http_Client */
 // require_once 'Zend/Http/Client.php';
 
 /**
  * @category   Zend
  * @package    Zend_Oauth
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_Oauth
 {
     const REQUEST_SCHEME_HEADER      = 'header';
     const REQUEST_SCHEME_POSTBODY    = 'postbody';
     const REQUEST_SCHEME_QUERYSTRING = 'querystring';
     const GET                        = 'GET';
     const POST                       = 'POST';
     const PUT                        = 'PUT';
     const DELETE                     = 'DELETE';
     const HEAD                       = 'HEAD';
     const OPTIONS                    = 'OPTIONS';
 
     /**
      * Singleton instance if required of the HTTP client
      *
      * @var Zend_Http_Client
      */
     protected static $httpClient = null;
 
     /**
      * Allows the external environment to make Zend_Oauth use a specific
      * Client instance.
      *
      * @param Zend_Http_Client $httpClient
      * @return void
      */
     public static function setHttpClient(Zend_Http_Client $httpClient)
     {
         self::$httpClient = $httpClient;
     }
 
     /**
      * Return the singleton instance of the HTTP Client. Note that
      * the instance is reset and cleared of previous parameters and
      * Authorization header values.
      *
      * @return Zend_Http_Client
      */
     public static function getHttpClient()
     {
         if (!isset(self::$httpClient)) {
             self::$httpClient = new Zend_Http_Client;
         } else {
             self::$httpClient->setHeaders('Authorization', null);
             self::$httpClient->resetParameters();
         }
         return self::$httpClient;
     }
 
     /**
      * Simple mechanism to delete the entire singleton HTTP Client instance
      * which forces an new instantiation for subsequent requests.
      *
      * @return void
      */
     public static function clearHttpClient()
     {
         self::$httpClient = null;
     }
 }