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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_Service_WindowsAzure
  * @subpackage Storage
  * @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    $Id$
  */
 
 /**
  * @see Zend_Service_WindowsAzure_Storage
  */
 // require_once 'Zend/Service/WindowsAzure/Storage.php';
 
 /**
  * @category   Zend
  * @package    Zend_Service_WindowsAzure
  * @subpackage Storage
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 abstract class Zend_Service_WindowsAzure_Storage_BatchStorageAbstract
     extends Zend_Service_WindowsAzure_Storage
 { 
     /**
      * Current batch
      * 
      * @var Zend_Service_WindowsAzure_Storage_Batch
      */
     protected $_currentBatch = null;
     
     /**
      * Set current batch
      * 
      * @param Zend_Service_WindowsAzure_Storage_Batch $batch Current batch
      * @throws Zend_Service_WindowsAzure_Exception
      */
     public function setCurrentBatch(Zend_Service_WindowsAzure_Storage_Batch $batch = null)
     {
         if (!is_null($batch) && $this->isInBatch()) {
       // require_once 'Zend/Service/WindowsAzure/Exception.php';
             throw new Zend_Service_WindowsAzure_Exception('Only one batch can be active at a time.');
         }
         $this->_currentBatch = $batch;
     }
     
     /**
      * Get current batch
      * 
      * @return Zend_Service_WindowsAzure_Storage_Batch
      */
     public function getCurrentBatch()
     {
         return $this->_currentBatch;
     }
     
     /**
      * Is there a current batch?
      * 
      * @return boolean
      */
     public function isInBatch()
     {
         return !is_null($this->_currentBatch);
     }
     
     /**
      * Starts a new batch operation set
      * 
      * @return Zend_Service_WindowsAzure_Storage_Batch
      * @throws Zend_Service_WindowsAzure_Exception
      */
     public function startBatch()
     {
     // require_once 'Zend/Service/WindowsAzure/Storage/Batch.php';
         return new Zend_Service_WindowsAzure_Storage_Batch($this, $this->getBaseUrl());
     }
   
   /**
    * Perform batch using Zend_Http_Client channel, combining all batch operations into one request
    *
    * @param array $operations Operations in batch
    * @param boolean $forTableStorage Is the request for table storage?
    * @param boolean $isSingleSelect Is the request a single select statement?
    * @param string $resourceType Resource type
    * @param string $requiredPermission Required permission
    * @return Zend_Http_Response
    */
   public function performBatch($operations = array(), $forTableStorage = false, $isSingleSelect = false, $resourceType = Zend_Service_WindowsAzure_Storage::RESOURCE_UNKNOWN, $requiredPermission = Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_READ)
   {
       // Generate boundaries
       $batchBoundary = 'batch_' . md5(time() . microtime());
       $changesetBoundary = 'changeset_' . md5(time() . microtime());
       
       // Set headers
       $headers = array();
       
     // Add version header
     $headers['x-ms-version'] = $this->_apiVersion;
     
     // Add dataservice headers
     $headers['DataServiceVersion'] = '1.0;NetFx';
     $headers['MaxDataServiceVersion'] = '1.0;NetFx';
     
     // Add content-type header
     $headers['Content-Type'] = 'multipart/mixed; boundary=' . $batchBoundary;
 
     // Set path and query string
     $path           = '/$batch';
     $queryString    = '';
     
     // Set verb
     $httpVerb = Zend_Http_Client::POST;
     
     // Generate raw data
       $rawData = '';
         
     // Single select?
     if ($isSingleSelect) {
         $operation = $operations[0];
         $rawData .= '--' . $batchBoundary . "\n";
             $rawData .= 'Content-Type: application/http' . "\n";
             $rawData .= 'Content-Transfer-Encoding: binary' . "\n\n";
             $rawData .= $operation; 
             $rawData .= '--' . $batchBoundary . '--';
     } else {
         $rawData .= '--' . $batchBoundary . "\n";
         $rawData .= 'Content-Type: multipart/mixed; boundary=' . $changesetBoundary . "\n\n";
         
             // Add operations
             foreach ($operations as $operation)
             {
                     $rawData .= '--' . $changesetBoundary . "\n";
                   $rawData .= 'Content-Type: application/http' . "\n";
                   $rawData .= 'Content-Transfer-Encoding: binary' . "\n\n";
                   $rawData .= $operation;
             }
             $rawData .= '--' . $changesetBoundary . '--' . "\n";
                     
         $rawData .= '--' . $batchBoundary . '--';
     }
 
     // Generate URL and sign request
     $requestUrl     = $this->_credentials->signRequestUrl($this->getBaseUrl() . $path . $queryString, $resourceType, $requiredPermission);
     $requestHeaders = $this->_credentials->signRequestHeaders($httpVerb, $path, $queryString, $headers, $forTableStorage, $resourceType, $requiredPermission);
 
     // Prepare request
     $this->_httpClientChannel->resetParameters(true);
     $this->_httpClientChannel->setUri($requestUrl);
     $this->_httpClientChannel->setHeaders($requestHeaders);
     $this->_httpClientChannel->setRawData($rawData);
     
     // Execute request
     $response = $this->_retryPolicy->execute(
         array($this->_httpClientChannel, 'request'),
         array($httpVerb)
     );
 
     return $response;
   }
 }