diff -r 5b37998e522e -r 162c1de6545a web/lib/Zend/Service/WindowsAzure/Storage/Blob.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Service/WindowsAzure/Storage/Blob.php	Fri Mar 11 15:05:35 2011 +0100
@@ -0,0 +1,2001 @@
+<?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) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://todo     name_todo
+ * @version    $Id: Blob.php 23167 2010-10-19 17:53:31Z mabe $
+ */
+
+/**
+ * @see Zend_Service_WindowsAzure_Credentials_CredentialsAbstract_SharedKey
+ */
+require_once 'Zend/Service/WindowsAzure/Credentials/SharedKey.php';
+
+/**
+ * @see Zend_Service_WindowsAzure_Credentials_SharedAccessSignature
+ */
+require_once 'Zend/Service/WindowsAzure/Credentials/SharedAccessSignature.php';
+
+/**
+ * @see Zend_Service_WindowsAzure_RetryPolicy_RetryPolicyAbstract
+ */
+require_once 'Zend/Service/WindowsAzure/RetryPolicy/RetryPolicyAbstract.php';
+
+/**
+ * @see Zend_Http_Client
+ */
+require_once 'Zend/Http/Client.php';
+
+/**
+ * @see Zend_Http_Response
+ */
+require_once 'Zend/Http/Response.php';
+
+/**
+ * @see Zend_Service_WindowsAzure_Storage
+ */
+require_once 'Zend/Service/WindowsAzure/Storage.php';
+
+/**
+ * @see Zend_Service_WindowsAzure_Storage_BlobContainer
+ */
+require_once 'Zend/Service/WindowsAzure/Storage/BlobContainer.php';
+
+/**
+ * @see Zend_Service_WindowsAzure_Storage_BlobInstance
+ */
+require_once 'Zend/Service/WindowsAzure/Storage/BlobInstance.php';
+
+/**
+ * @see Zend_Service_WindowsAzure_Storage_PageRegionInstance
+ */
+require_once 'Zend/Service/WindowsAzure/Storage/PageRegionInstance.php';
+
+/**
+ * @see Zend_Service_WindowsAzure_Storage_LeaseInstance
+ */
+require_once 'Zend/Service/WindowsAzure/Storage/LeaseInstance.php';
+
+/**
+ * @see Zend_Service_WindowsAzure_Storage_SignedIdentifier
+ */
+require_once 'Zend/Service/WindowsAzure/Storage/SignedIdentifier.php';
+
+/**
+ * @see Zend_Service_WindowsAzure_Exception
+ */
+require_once 'Zend/Service/WindowsAzure/Exception.php';
+
+
+/**
+ * @category   Zend
+ * @package    Zend_Service_WindowsAzure
+ * @subpackage Storage
+ * @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_Service_WindowsAzure_Storage_Blob extends Zend_Service_WindowsAzure_Storage
+{
+	/**
+	 * ACL - Private access
+	 */
+	const ACL_PRIVATE = null;
+
+	/**
+	 * ACL - Public access (read all blobs)
+	 *
+	 * @deprecated Use ACL_PUBLIC_CONTAINER or ACL_PUBLIC_BLOB instead.
+	 */
+	const ACL_PUBLIC = 'container';
+	
+	/**
+	 * ACL - Blob Public access (read all blobs)
+	 */
+	const ACL_PUBLIC_BLOB = 'blob';
+
+	/**
+	 * ACL - Container Public access (enumerate and read all blobs)
+	 */
+	const ACL_PUBLIC_CONTAINER = 'container';
+
+	/**
+	 * Blob lease constants
+	 */
+	const LEASE_ACQUIRE = 'acquire';
+	const LEASE_RENEW   = 'renew';
+	const LEASE_RELEASE = 'release';
+	const LEASE_BREAK   = 'break';
+
+	/**
+	 * Maximal blob size (in bytes)
+	 */
+	const MAX_BLOB_SIZE = 67108864;
+
+	/**
+	 * Maximal blob transfer size (in bytes)
+	 */
+	const MAX_BLOB_TRANSFER_SIZE = 4194304;
+
+	/**
+	 * Blob types
+	 */
+	const BLOBTYPE_BLOCK = 'BlockBlob';
+	const BLOBTYPE_PAGE  = 'PageBlob';
+
+	/**
+	 * Put page write options
+	 */
+	const PAGE_WRITE_UPDATE = 'update';
+	const PAGE_WRITE_CLEAR  = 'clear';
+
+	/**
+	 * Stream wrapper clients
+	 *
+	 * @var array
+	 */
+	protected static $_wrapperClients = array();
+
+	/**
+	 * SharedAccessSignature credentials
+	 *
+	 * @var Zend_Service_WindowsAzure_Credentials_SharedAccessSignature
+	 */
+	private $_sharedAccessSignatureCredentials = null;
+
+	/**
+	 * Creates a new Zend_Service_WindowsAzure_Storage_Blob instance
+	 *
+	 * @param string $host Storage host name
+	 * @param string $accountName Account name for Windows Azure
+	 * @param string $accountKey Account key for Windows Azure
+	 * @param boolean $usePathStyleUri Use path-style URI's
+	 * @param Zend_Service_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy Retry policy to use when making requests
+	 */
+	public function __construct($host = Zend_Service_WindowsAzure_Storage::URL_DEV_BLOB, $accountName = Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::DEVSTORE_ACCOUNT, $accountKey = Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::DEVSTORE_KEY, $usePathStyleUri = false, Zend_Service_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy = null)
+	{
+		parent::__construct($host, $accountName, $accountKey, $usePathStyleUri, $retryPolicy);
+
+		// API version
+		$this->_apiVersion = '2009-09-19';
+
+		// SharedAccessSignature credentials
+		$this->_sharedAccessSignatureCredentials = new Zend_Service_WindowsAzure_Credentials_SharedAccessSignature($accountName, $accountKey, $usePathStyleUri);
+	}
+
+	/**
+	 * Check if a blob exists
+	 *
+	 * @param string $containerName Container name
+	 * @param string $blobName      Blob name
+	 * @param string $snapshotId    Snapshot identifier
+	 * @return boolean
+	 */
+	public function blobExists($containerName = '', $blobName = '', $snapshotId = null)
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+
+		// Get blob instance
+		try {
+			$this->getBlobInstance($containerName, $blobName, $snapshotId);
+		} catch (Zend_Service_WindowsAzure_Exception $e) {
+			return false;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Check if a container exists
+	 *
+	 * @param string $containerName Container name
+	 * @return boolean
+	 */
+	public function containerExists($containerName = '')
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+			
+		// List containers
+		$containers = $this->listContainers($containerName, 1);
+		foreach ($containers as $container) {
+			if ($container->Name == $containerName) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * Create container
+	 *
+	 * @param string $containerName Container name
+	 * @param array  $metadata      Key/value pairs of meta data
+	 * @return object Container properties
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function createContainer($containerName = '', $metadata = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if (!is_array($metadata)) {
+			throw new Zend_Service_WindowsAzure_Exception('Meta data should be an array of key and value pairs.');
+		}
+			
+		// Create metadata headers
+		$headers = array();
+		$headers = array_merge($headers, $this->_generateMetadataHeaders($metadata));
+
+		// Perform request
+		$response = $this->_performRequest($containerName, '?restype=container', Zend_Http_Client::PUT, $headers, false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_CONTAINER, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if ($response->isSuccessful()) {
+			return new Zend_Service_WindowsAzure_Storage_BlobContainer(
+			$containerName,
+			$response->getHeader('Etag'),
+			$response->getHeader('Last-modified'),
+			$metadata
+			);
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Get container ACL
+	 *
+	 * @param string $containerName Container name
+	 * @param bool   $signedIdentifiers Display only private/blob/container or display signed identifiers?
+	 * @return string Acl, to be compared with Zend_Service_WindowsAzure_Storage_Blob::ACL_*
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function getContainerAcl($containerName = '', $signedIdentifiers = false)
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+
+		// Perform request
+		$response = $this->_performRequest($containerName, '?restype=container&comp=acl', Zend_Http_Client::GET, array(), false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_CONTAINER, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_READ);
+		if ($response->isSuccessful()) {
+			if ($signedIdentifiers == false)  {
+				// Only private/blob/container
+				$accessType = $response->getHeader(Zend_Service_WindowsAzure_Storage::PREFIX_STORAGE_HEADER . 'blob-public-access');
+				if (strtolower($accessType) == 'true') {
+					$accessType = self::ACL_PUBLIC_CONTAINER;
+				}
+				return $accessType;
+			} else {
+				// Parse result
+				$result = $this->_parseResponse($response);
+				if (!$result) {
+					return array();
+				}
+
+				$entries = null;
+				if ($result->SignedIdentifier) {
+					if (count($result->SignedIdentifier) > 1) {
+						$entries = $result->SignedIdentifier;
+					} else {
+						$entries = array($result->SignedIdentifier);
+					}
+				}
+
+				// Return value
+				$returnValue = array();
+				foreach ($entries as $entry) {
+					$returnValue[] = new Zend_Service_WindowsAzure_Storage_SignedIdentifier(
+					$entry->Id,
+					$entry->AccessPolicy ? $entry->AccessPolicy->Start ? $entry->AccessPolicy->Start : '' : '',
+					$entry->AccessPolicy ? $entry->AccessPolicy->Expiry ? $entry->AccessPolicy->Expiry : '' : '',
+					$entry->AccessPolicy ? $entry->AccessPolicy->Permission ? $entry->AccessPolicy->Permission : '' : ''
+					);
+				}
+
+				// Return
+				return $returnValue;
+			}
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Set container ACL
+	 *
+	 * @param string $containerName Container name
+	 * @param bool $acl Zend_Service_WindowsAzure_Storage_Blob::ACL_*
+	 * @param array $signedIdentifiers Signed identifiers
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function setContainerAcl($containerName = '', $acl = self::ACL_PRIVATE, $signedIdentifiers = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+
+		// Headers
+		$headers = array();
+
+		// Acl specified?
+		if ($acl != self::ACL_PRIVATE && $acl !== null && $acl != '') {
+			$headers[Zend_Service_WindowsAzure_Storage::PREFIX_STORAGE_HEADER . 'blob-public-access'] = $acl;
+		}
+
+		// Policies
+		$policies = null;
+		if (is_array($signedIdentifiers) && count($signedIdentifiers) > 0) {
+			$policies  = '';
+			$policies .= '<?xml version="1.0" encoding="utf-8"?>' . "\r\n";
+			$policies .= '<SignedIdentifiers>' . "\r\n";
+			foreach ($signedIdentifiers as $signedIdentifier) {
+				$policies .= '  <SignedIdentifier>' . "\r\n";
+				$policies .= '    <Id>' . $signedIdentifier->Id . '</Id>' . "\r\n";
+				$policies .= '    <AccessPolicy>' . "\r\n";
+				if ($signedIdentifier->Start != '')
+				$policies .= '      <Start>' . $signedIdentifier->Start . '</Start>' . "\r\n";
+				if ($signedIdentifier->Expiry != '')
+				$policies .= '      <Expiry>' . $signedIdentifier->Expiry . '</Expiry>' . "\r\n";
+				if ($signedIdentifier->Permissions != '')
+				$policies .= '      <Permission>' . $signedIdentifier->Permissions . '</Permission>' . "\r\n";
+				$policies .= '    </AccessPolicy>' . "\r\n";
+				$policies .= '  </SignedIdentifier>' . "\r\n";
+			}
+			$policies .= '</SignedIdentifiers>' . "\r\n";
+		}
+
+		// Perform request
+		$response = $this->_performRequest($containerName, '?restype=container&comp=acl', Zend_Http_Client::PUT, $headers, false, $policies, Zend_Service_WindowsAzure_Storage::RESOURCE_CONTAINER, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if (!$response->isSuccessful()) {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Get container
+	 *
+	 * @param string $containerName  Container name
+	 * @return Zend_Service_WindowsAzure_Storage_BlobContainer
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function getContainer($containerName = '')
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+
+		// Perform request
+		$response = $this->_performRequest($containerName, '?restype=container', Zend_Http_Client::GET, array(), false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_CONTAINER, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_READ);
+		if ($response->isSuccessful()) {
+			// Parse metadata
+			$metadata = $this->_parseMetadataHeaders($response->getHeaders());
+
+			// Return container
+			return new Zend_Service_WindowsAzure_Storage_BlobContainer(
+			$containerName,
+			$response->getHeader('Etag'),
+			$response->getHeader('Last-modified'),
+			$metadata
+			);
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Get container metadata
+	 *
+	 * @param string $containerName  Container name
+	 * @return array Key/value pairs of meta data
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function getContainerMetadata($containerName = '')
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+
+		return $this->getContainer($containerName)->Metadata;
+	}
+
+	/**
+	 * Set container metadata
+	 *
+	 * Calling the Set Container Metadata operation overwrites all existing metadata that is associated with the container. It's not possible to modify an individual name/value pair.
+	 *
+	 * @param string $containerName      Container name
+	 * @param array  $metadata           Key/value pairs of meta data
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function setContainerMetadata($containerName = '', $metadata = array(), $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if (!is_array($metadata)) {
+			throw new Zend_Service_WindowsAzure_Exception('Meta data should be an array of key and value pairs.');
+		}
+		if (count($metadata) == 0) {
+			return;
+		}
+
+		// Create metadata headers
+		$headers = array();
+		$headers = array_merge($headers, $this->_generateMetadataHeaders($metadata));
+
+		// Additional headers?
+		foreach ($additionalHeaders as $key => $value) {
+			$headers[$key] = $value;
+		}
+
+		// Perform request
+		$response = $this->_performRequest($containerName, '?restype=container&comp=metadata', Zend_Http_Client::PUT, $headers, false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_CONTAINER, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if (!$response->isSuccessful()) {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Delete container
+	 *
+	 * @param string $containerName      Container name
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function deleteContainer($containerName = '', $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+			
+		// Additional headers?
+		$headers = array();
+		foreach ($additionalHeaders as $key => $value) {
+			$headers[$key] = $value;
+		}
+
+		// Perform request
+		$response = $this->_performRequest($containerName, '?restype=container', Zend_Http_Client::DELETE, $headers, false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_CONTAINER, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if (!$response->isSuccessful()) {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * List containers
+	 *
+	 * @param string $prefix     Optional. Filters the results to return only containers whose name begins with the specified prefix.
+	 * @param int    $maxResults Optional. Specifies the maximum number of containers to return per call to Azure storage. This does NOT affect list size returned by this function. (maximum: 5000)
+	 * @param string $marker     Optional string value that identifies the portion of the list to be returned with the next list operation.
+	 * @param string $include    Optional. Include this parameter to specify that the container's metadata be returned as part of the response body. (allowed values: '', 'metadata')
+	 * @param int    $currentResultCount Current result count (internal use)
+	 * @return array
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function listContainers($prefix = null, $maxResults = null, $marker = null, $include = null, $currentResultCount = 0)
+	{
+		// Build query string
+		$queryString = array('comp=list');
+		if ($prefix !== null) {
+			$queryString[] = 'prefix=' . $prefix;
+		}
+		if ($maxResults !== null) {
+			$queryString[] = 'maxresults=' . $maxResults;
+		}
+		if ($marker !== null) {
+			$queryString[] = 'marker=' . $marker;
+		}
+		if ($include !== null) {
+			$queryString[] = 'include=' . $include;
+		}
+		$queryString = self::createQueryStringFromArray($queryString);
+		 
+		// Perform request
+		$response = $this->_performRequest('', $queryString, Zend_Http_Client::GET, array(), false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_CONTAINER, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_LIST);
+		if ($response->isSuccessful()) {
+			$xmlContainers = $this->_parseResponse($response)->Containers->Container;
+			$xmlMarker = (string)$this->_parseResponse($response)->NextMarker;
+
+			$containers = array();
+			if ($xmlContainers !== null) {
+				for ($i = 0; $i < count($xmlContainers); $i++) {
+					$containers[] = new Zend_Service_WindowsAzure_Storage_BlobContainer(
+					(string)$xmlContainers[$i]->Name,
+					(string)$xmlContainers[$i]->Etag,
+					(string)$xmlContainers[$i]->LastModified,
+					$this->_parseMetadataElement($xmlContainers[$i])
+					);
+				}
+			}
+			$currentResultCount = $currentResultCount + count($containers);
+			if ($maxResults !== null && $currentResultCount < $maxResults) {
+				if ($xmlMarker !== null && $xmlMarker != '') {
+					$containers = array_merge($containers, $this->listContainers($prefix, $maxResults, $xmlMarker, $include, $currentResultCount));
+				}
+			}
+			if ($maxResults !== null && count($containers) > $maxResults) {
+				$containers = array_slice($containers, 0, $maxResults);
+			}
+			 
+			return $containers;
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Put blob
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param string $localFileName      Local file name to be uploaded
+	 * @param array  $metadata           Key/value pairs of meta data
+	 * @param string $leaseId            Lease identifier
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @return object Partial blob properties
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function putBlob($containerName = '', $blobName = '', $localFileName = '', $metadata = array(), $leaseId = null, $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($localFileName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Local file name is not specified.');
+		}
+		if (!file_exists($localFileName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Local file not found.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+			
+		// Check file size
+		if (filesize($localFileName) >= self::MAX_BLOB_SIZE) {
+			return $this->putLargeBlob($containerName, $blobName, $localFileName, $metadata, $leaseId);
+		}
+
+		// Put the data to Windows Azure Storage
+		return $this->putBlobData($containerName, $blobName, file_get_contents($localFileName), $metadata, $leaseId, $additionalHeaders);
+	}
+
+	/**
+	 * Put blob data
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param mixed  $data      		 Data to store
+	 * @param array  $metadata           Key/value pairs of meta data
+	 * @param string $leaseId            Lease identifier
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @return object Partial blob properties
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function putBlobData($containerName = '', $blobName = '', $data = '', $metadata = array(), $leaseId = null, $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+
+		// Create metadata headers
+		$headers = array();
+		if ($leaseId !== null) {
+			$headers['x-ms-lease-id'] = $leaseId;
+		}
+		$headers = array_merge($headers, $this->_generateMetadataHeaders($metadata));
+
+		// Additional headers?
+		foreach ($additionalHeaders as $key => $value) {
+			$headers[$key] = $value;
+		}
+
+		// Specify blob type
+		$headers[Zend_Service_WindowsAzure_Storage::PREFIX_STORAGE_HEADER . 'blob-type'] = self::BLOBTYPE_BLOCK;
+
+		// Resource name
+		$resourceName = self::createResourceName($containerName , $blobName);
+
+		// Perform request
+		$response = $this->_performRequest($resourceName, '', Zend_Http_Client::PUT, $headers, false, $data, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if ($response->isSuccessful()) {
+			return new Zend_Service_WindowsAzure_Storage_BlobInstance(
+			$containerName,
+			$blobName,
+			null,
+			$response->getHeader('Etag'),
+			$response->getHeader('Last-modified'),
+			$this->getBaseUrl() . '/' . $containerName . '/' . $blobName,
+			strlen($data),
+				'',
+				'',
+				'',
+			false,
+			$metadata
+			);
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Put large blob (> 64 MB)
+	 *
+	 * @param string $containerName Container name
+	 * @param string $blobName Blob name
+	 * @param string $localFileName Local file name to be uploaded
+	 * @param array  $metadata      Key/value pairs of meta data
+	 * @param string $leaseId       Lease identifier
+	 * @return object Partial blob properties
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function putLargeBlob($containerName = '', $blobName = '', $localFileName = '', $metadata = array(), $leaseId = null)
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($localFileName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Local file name is not specified.');
+		}
+		if (!file_exists($localFileName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Local file not found.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+			
+		// Check file size
+		if (filesize($localFileName) < self::MAX_BLOB_SIZE) {
+			return $this->putBlob($containerName, $blobName, $localFileName, $metadata);
+		}
+			
+		// Determine number of parts
+		$numberOfParts = ceil( filesize($localFileName) / self::MAX_BLOB_TRANSFER_SIZE );
+
+		// Generate block id's
+		$blockIdentifiers = array();
+		for ($i = 0; $i < $numberOfParts; $i++) {
+			$blockIdentifiers[] = $this->_generateBlockId($i);
+		}
+
+		// Open file
+		$fp = fopen($localFileName, 'r');
+		if ($fp === false) {
+			throw new Zend_Service_WindowsAzure_Exception('Could not open local file.');
+		}
+			
+		// Upload parts
+		for ($i = 0; $i < $numberOfParts; $i++) {
+			// Seek position in file
+			fseek($fp, $i * self::MAX_BLOB_TRANSFER_SIZE);
+				
+			// Read contents
+			$fileContents = fread($fp, self::MAX_BLOB_TRANSFER_SIZE);
+				
+			// Put block
+			$this->putBlock($containerName, $blobName, $blockIdentifiers[$i], $fileContents, $leaseId);
+				
+			// Dispose file contents
+			$fileContents = null;
+			unset($fileContents);
+		}
+
+		// Close file
+		fclose($fp);
+
+		// Put block list
+		$this->putBlockList($containerName, $blobName, $blockIdentifiers, $metadata, $leaseId);
+
+		// Return information of the blob
+		return $this->getBlobInstance($containerName, $blobName, null, $leaseId);
+	}
+		
+	/**
+	 * Put large blob block
+	 *
+	 * @param string $containerName Container name
+	 * @param string $blobName      Blob name
+	 * @param string $identifier    Block ID
+	 * @param array  $contents      Contents of the block
+	 * @param string $leaseId       Lease identifier
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function putBlock($containerName = '', $blobName = '', $identifier = '', $contents = '', $leaseId = null)
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($identifier === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Block identifier is not specified.');
+		}
+		if (strlen($contents) > self::MAX_BLOB_TRANSFER_SIZE) {
+			throw new Zend_Service_WindowsAzure_Exception('Block size is too big.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+
+		// Headers
+		$headers = array();
+		if ($leaseId !== null) {
+			$headers['x-ms-lease-id'] = $leaseId;
+		}
+			
+		// Resource name
+		$resourceName = self::createResourceName($containerName , $blobName);
+
+		// Upload
+		$response = $this->_performRequest($resourceName, '?comp=block&blockid=' . base64_encode($identifier), Zend_Http_Client::PUT, $headers, false, $contents, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if (!$response->isSuccessful()) {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Put block list
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param array $blockList           Array of block identifiers
+	 * @param array  $metadata           Key/value pairs of meta data
+	 * @param string $leaseId            Lease identifier
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function putBlockList($containerName = '', $blobName = '', $blockList = array(), $metadata = array(), $leaseId = null, $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if (count($blockList) == 0) {
+			throw new Zend_Service_WindowsAzure_Exception('Block list does not contain any elements.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+
+		// Generate block list
+		$blocks = '';
+		foreach ($blockList as $block) {
+			$blocks .= '  <Latest>' . base64_encode($block) . '</Latest>' . "\n";
+		}
+
+		// Generate block list request
+		$fileContents = utf8_encode(implode("\n", array(
+			'<?xml version="1.0" encoding="utf-8"?>',
+			'<BlockList>',
+		$blocks,
+			'</BlockList>'
+			)));
+
+			// Create metadata headers
+			$headers = array();
+			if ($leaseId !== null) {
+				$headers['x-ms-lease-id'] = $leaseId;
+			}
+			$headers = array_merge($headers, $this->_generateMetadataHeaders($metadata));
+
+			// Additional headers?
+			foreach ($additionalHeaders as $key => $value) {
+				$headers[$key] = $value;
+			}
+
+			// Resource name
+			$resourceName = self::createResourceName($containerName , $blobName);
+
+			// Perform request
+			$response = $this->_performRequest($resourceName, '?comp=blocklist', Zend_Http_Client::PUT, $headers, false, $fileContents, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+			if (!$response->isSuccessful()) {
+				throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+			}
+	}
+
+	/**
+	 * Get block list
+	 *
+	 * @param string $containerName Container name
+	 * @param string $blobName      Blob name
+	 * @param string $snapshotId    Snapshot identifier
+	 * @param string $leaseId       Lease identifier
+	 * @param integer $type         Type of block list to retrieve. 0 = all, 1 = committed, 2 = uncommitted
+	 * @return array
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function getBlockList($containerName = '', $blobName = '', $snapshotId = null, $leaseId = null, $type = 0)
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($type < 0 || $type > 2) {
+			throw new Zend_Service_WindowsAzure_Exception('Invalid type of block list to retrieve.');
+		}
+
+		// Set $blockListType
+		$blockListType = 'all';
+		if ($type == 1) {
+			$blockListType = 'committed';
+		}
+		if ($type == 2) {
+			$blockListType = 'uncommitted';
+		}
+
+		// Headers
+		$headers = array();
+		if ($leaseId !== null) {
+			$headers['x-ms-lease-id'] = $leaseId;
+		}
+
+		// Build query string
+		$queryString = array('comp=blocklist', 'blocklisttype=' . $blockListType);
+		if ($snapshotId !== null) {
+			$queryString[] = 'snapshot=' . $snapshotId;
+		}
+		$queryString = self::createQueryStringFromArray($queryString);
+
+		// Resource name
+		$resourceName = self::createResourceName($containerName , $blobName);
+			
+		// Perform request
+		$response = $this->_performRequest($resourceName, $queryString, Zend_Http_Client::GET, $headers, false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_READ);
+		if ($response->isSuccessful()) {
+			// Parse response
+			$blockList = $this->_parseResponse($response);
+
+			// Create return value
+			$returnValue = array();
+			if ($blockList->CommittedBlocks) {
+				foreach ($blockList->CommittedBlocks->Block as $block) {
+					$returnValue['CommittedBlocks'][] = (object)array(
+			            'Name' => (string)$block->Name,
+			            'Size' => (string)$block->Size
+					);
+				}
+			}
+			if ($blockList->UncommittedBlocks)  {
+				foreach ($blockList->UncommittedBlocks->Block as $block) {
+					$returnValue['UncommittedBlocks'][] = (object)array(
+			            'Name' => (string)$block->Name,
+			            'Size' => (string)$block->Size
+					);
+				}
+			}
+
+			return $returnValue;
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Create page blob
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param int    $size      		 Size of the page blob in bytes
+	 * @param array  $metadata           Key/value pairs of meta data
+	 * @param string $leaseId            Lease identifier
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @return object Partial blob properties
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function createPageBlob($containerName = '', $blobName = '', $size = 0, $metadata = array(), $leaseId = null, $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+		if ($size <= 0) {
+			throw new Zend_Service_WindowsAzure_Exception('Page blob size must be specified.');
+		}
+
+		// Create metadata headers
+		$headers = array();
+		if ($leaseId !== null) {
+			$headers['x-ms-lease-id'] = $leaseId;
+		}
+		$headers = array_merge($headers, $this->_generateMetadataHeaders($metadata));
+
+		// Additional headers?
+		foreach ($additionalHeaders as $key => $value) {
+			$headers[$key] = $value;
+		}
+
+		// Specify blob type & blob length
+		$headers[Zend_Service_WindowsAzure_Storage::PREFIX_STORAGE_HEADER . 'blob-type'] = self::BLOBTYPE_PAGE;
+		$headers[Zend_Service_WindowsAzure_Storage::PREFIX_STORAGE_HEADER . 'blob-content-length'] = $size;
+		$headers['Content-Length'] = 0;
+
+		// Resource name
+		$resourceName = self::createResourceName($containerName , $blobName);
+
+		// Perform request
+		$response = $this->_performRequest($resourceName, '', Zend_Http_Client::PUT, $headers, false, '', Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if ($response->isSuccessful()) {
+			return new Zend_Service_WindowsAzure_Storage_BlobInstance(
+			$containerName,
+			$blobName,
+			null,
+			$response->getHeader('Etag'),
+			$response->getHeader('Last-modified'),
+			$this->getBaseUrl() . '/' . $containerName . '/' . $blobName,
+			$size,
+				'',
+				'',
+				'',
+			false,
+			$metadata
+			);
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Put page in page blob
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param int    $startByteOffset    Start byte offset
+	 * @param int    $endByteOffset      End byte offset
+	 * @param mixed  $contents			 Page contents
+	 * @param string $writeMethod        Write method (Zend_Service_WindowsAzure_Storage_Blob::PAGE_WRITE_*)
+	 * @param string $leaseId            Lease identifier
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function putPage($containerName = '', $blobName = '', $startByteOffset = 0, $endByteOffset = 0, $contents = '', $writeMethod = self::PAGE_WRITE_UPDATE, $leaseId = null, $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+		if ($startByteOffset % 512 != 0) {
+			throw new Zend_Service_WindowsAzure_Exception('Start byte offset must be a modulus of 512.');
+		}
+		if (($endByteOffset + 1) % 512 != 0) {
+			throw new Zend_Service_WindowsAzure_Exception('End byte offset must be a modulus of 512 minus 1.');
+		}
+
+		// Determine size
+		$size = strlen($contents);
+		if ($size >= self::MAX_BLOB_TRANSFER_SIZE) {
+			throw new Zend_Service_WindowsAzure_Exception('Page blob size must not be larger than ' + self::MAX_BLOB_TRANSFER_SIZE . ' bytes.');
+		}
+
+		// Create metadata headers
+		$headers = array();
+		if ($leaseId !== null) {
+			$headers['x-ms-lease-id'] = $leaseId;
+		}
+
+		// Additional headers?
+		foreach ($additionalHeaders as $key => $value) {
+			$headers[$key] = $value;
+		}
+
+		// Specify range
+		$headers['Range'] = 'bytes=' . $startByteOffset . '-' . $endByteOffset;
+
+		// Write method
+		$headers[Zend_Service_WindowsAzure_Storage::PREFIX_STORAGE_HEADER . 'page-write'] = $writeMethod;
+
+		// Resource name
+		$resourceName = self::createResourceName($containerName , $blobName);
+
+		// Perform request
+		$response = $this->_performRequest($resourceName, '?comp=page', Zend_Http_Client::PUT, $headers, false, $contents, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if (!$response->isSuccessful()) {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Put page in page blob
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param int    $startByteOffset    Start byte offset
+	 * @param int    $endByteOffset      End byte offset
+	 * @param string $leaseId            Lease identifier
+	 * @return array Array of page ranges
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function getPageRegions($containerName = '', $blobName = '', $startByteOffset = 0, $endByteOffset = 0, $leaseId = null)
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+		if ($startByteOffset % 512 != 0) {
+			throw new Zend_Service_WindowsAzure_Exception('Start byte offset must be a modulus of 512.');
+		}
+		if ($endByteOffset > 0 && ($endByteOffset + 1) % 512 != 0) {
+			throw new Zend_Service_WindowsAzure_Exception('End byte offset must be a modulus of 512 minus 1.');
+		}
+
+		// Create metadata headers
+		$headers = array();
+		if ($leaseId !== null) {
+			$headers['x-ms-lease-id'] = $leaseId;
+		}
+
+		// Specify range?
+		if ($endByteOffset > 0) {
+			$headers['Range'] = 'bytes=' . $startByteOffset . '-' . $endByteOffset;
+		}
+
+		// Resource name
+		$resourceName = self::createResourceName($containerName , $blobName);
+
+		// Perform request
+		$response = $this->_performRequest($resourceName, '?comp=pagelist', Zend_Http_Client::GET, $headers, false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if ($response->isSuccessful()) {
+			$result = $this->_parseResponse($response);
+			$xmlRanges = null;
+			if (count($result->PageRange) > 1) {
+				$xmlRanges = $result->PageRange;
+			} else {
+				$xmlRanges = array($result->PageRange);
+			}
+
+			$ranges = array();
+			for ($i = 0; $i < count($xmlRanges); $i++) {
+				$ranges[] = new Zend_Service_WindowsAzure_Storage_PageRegionInstance(
+				(int)$xmlRanges[$i]->Start,
+				(int)$xmlRanges[$i]->End
+				);
+			}
+			 
+			return $ranges;
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+		
+	/**
+	 * Copy blob
+	 *
+	 * @param string $sourceContainerName       Source container name
+	 * @param string $sourceBlobName            Source blob name
+	 * @param string $destinationContainerName  Destination container name
+	 * @param string $destinationBlobName       Destination blob name
+	 * @param array  $metadata                  Key/value pairs of meta data
+	 * @param string $sourceSnapshotId          Source snapshot identifier
+	 * @param string $destinationLeaseId        Destination lease identifier
+	 * @param array  $additionalHeaders         Additional headers. See http://msdn.microsoft.com/en-us/library/dd894037.aspx for more information.
+	 * @return object Partial blob properties
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function copyBlob($sourceContainerName = '', $sourceBlobName = '', $destinationContainerName = '', $destinationBlobName = '', $metadata = array(), $sourceSnapshotId = null, $destinationLeaseId = null, $additionalHeaders = array())
+	{
+		if ($sourceContainerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Source container name is not specified.');
+		}
+		if (!self::isValidContainerName($sourceContainerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Source container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($sourceBlobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Source blob name is not specified.');
+		}
+		if ($destinationContainerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Destination container name is not specified.');
+		}
+		if (!self::isValidContainerName($destinationContainerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Destination container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($destinationBlobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Destination blob name is not specified.');
+		}
+		if ($sourceContainerName === '$root' && strpos($sourceBlobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+		if ($destinationContainerName === '$root' && strpos($destinationBlobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+
+		// Create metadata headers
+		$headers = array();
+		if ($destinationLeaseId !== null) {
+			$headers['x-ms-lease-id'] = $destinationLeaseId;
+		}
+		$headers = array_merge($headers, $this->_generateMetadataHeaders($metadata));
+
+		// Additional headers?
+		foreach ($additionalHeaders as $key => $value) {
+			$headers[$key] = $value;
+		}
+
+		// Resource names
+		$sourceResourceName = self::createResourceName($sourceContainerName, $sourceBlobName);
+		if ($sourceSnapshotId !== null) {
+			$sourceResourceName .= '?snapshot=' . $sourceSnapshotId;
+		}
+		$destinationResourceName = self::createResourceName($destinationContainerName, $destinationBlobName);
+
+		// Set source blob
+		$headers["x-ms-copy-source"] = '/' . $this->_accountName . '/' . $sourceResourceName;
+
+		// Perform request
+		$response = $this->_performRequest($destinationResourceName, '', Zend_Http_Client::PUT, $headers, false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if ($response->isSuccessful()) {
+			return new Zend_Service_WindowsAzure_Storage_BlobInstance(
+			$destinationContainerName,
+			$destinationBlobName,
+			null,
+			$response->getHeader('Etag'),
+			$response->getHeader('Last-modified'),
+			$this->getBaseUrl() . '/' . $destinationContainerName . '/' . $destinationBlobName,
+			0,
+				'',
+				'',
+				'',
+			false,
+			$metadata
+			);
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Get blob
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param string $localFileName      Local file name to store downloaded blob
+	 * @param string $snapshotId         Snapshot identifier
+	 * @param string $leaseId            Lease identifier
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function getBlob($containerName = '', $blobName = '', $localFileName = '', $snapshotId = null, $leaseId = null, $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($localFileName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Local file name is not specified.');
+		}
+
+		// Fetch data
+		file_put_contents($localFileName, $this->getBlobData($containerName, $blobName, $snapshotId, $leaseId, $additionalHeaders));
+	}
+
+	/**
+	 * Get blob data
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param string $snapshotId         Snapshot identifier
+	 * @param string $leaseId            Lease identifier
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @return mixed Blob contents
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function getBlobData($containerName = '', $blobName = '', $snapshotId = null, $leaseId = null, $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+
+		// Build query string
+		$queryString = array();
+		if ($snapshotId !== null) {
+			$queryString[] = 'snapshot=' . $snapshotId;
+		}
+		$queryString = self::createQueryStringFromArray($queryString);
+
+		// Additional headers?
+		$headers = array();
+		if ($leaseId !== null) {
+			$headers['x-ms-lease-id'] = $leaseId;
+		}
+		foreach ($additionalHeaders as $key => $value) {
+			$headers[$key] = $value;
+		}
+
+		// Resource name
+		$resourceName = self::createResourceName($containerName , $blobName);
+
+		// Perform request
+		$response = $this->_performRequest($resourceName, $queryString, Zend_Http_Client::GET, $headers, false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_READ);
+		if ($response->isSuccessful()) {
+			return $response->getBody();
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Get blob instance
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param string $snapshotId         Snapshot identifier
+	 * @param string $leaseId            Lease identifier
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @return Zend_Service_WindowsAzure_Storage_BlobInstance
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function getBlobInstance($containerName = '', $blobName = '', $snapshotId = null, $leaseId = null, $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+
+		// Build query string
+		$queryString = array();
+		if ($snapshotId !== null) {
+			$queryString[] = 'snapshot=' . $snapshotId;
+		}
+		$queryString = self::createQueryStringFromArray($queryString);
+		 
+		// Additional headers?
+		$headers = array();
+		if ($leaseId !== null) {
+			$headers['x-ms-lease-id'] = $leaseId;
+		}
+		foreach ($additionalHeaders as $key => $value) {
+			$headers[$key] = $value;
+		}
+
+		// Resource name
+		$resourceName = self::createResourceName($containerName , $blobName);
+
+		// Perform request
+		$response = $this->_performRequest($resourceName, $queryString, Zend_Http_Client::HEAD, $headers, false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_READ);
+		if ($response->isSuccessful()) {
+			// Parse metadata
+			$metadata = $this->_parseMetadataHeaders($response->getHeaders());
+
+			// Return blob
+			return new Zend_Service_WindowsAzure_Storage_BlobInstance(
+			$containerName,
+			$blobName,
+			$snapshotId,
+			$response->getHeader('Etag'),
+			$response->getHeader('Last-modified'),
+			$this->getBaseUrl() . '/' . $containerName . '/' . $blobName,
+			$response->getHeader('Content-Length'),
+			$response->getHeader('Content-Type'),
+			$response->getHeader('Content-Encoding'),
+			$response->getHeader('Content-Language'),
+			$response->getHeader('Cache-Control'),
+			$response->getHeader('x-ms-blob-type'),
+			$response->getHeader('x-ms-lease-status'),
+			false,
+			$metadata
+			);
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Get blob metadata
+	 *
+	 * @param string $containerName  Container name
+	 * @param string $blobName       Blob name
+	 * @param string $snapshotId     Snapshot identifier
+	 * @param string $leaseId        Lease identifier
+	 * @return array Key/value pairs of meta data
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function getBlobMetadata($containerName = '', $blobName = '', $snapshotId = null, $leaseId = null)
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+
+		return $this->getBlobInstance($containerName, $blobName, $snapshotId, $leaseId)->Metadata;
+	}
+
+	/**
+	 * Set blob metadata
+	 *
+	 * Calling the Set Blob Metadata operation overwrites all existing metadata that is associated with the blob. It's not possible to modify an individual name/value pair.
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param array  $metadata           Key/value pairs of meta data
+	 * @param string $leaseId            Lease identifier
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function setBlobMetadata($containerName = '', $blobName = '', $metadata = array(), $leaseId = null, $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+		if (count($metadata) == 0) {
+			return;
+		}
+
+		// Create metadata headers
+		$headers = array();
+		if ($leaseId !== null) {
+			$headers['x-ms-lease-id'] = $leaseId;
+		}
+		$headers = array_merge($headers, $this->_generateMetadataHeaders($metadata));
+
+		// Additional headers?
+		foreach ($additionalHeaders as $key => $value) {
+			$headers[$key] = $value;
+		}
+
+		// Perform request
+		$response = $this->_performRequest($containerName . '/' . $blobName, '?comp=metadata', Zend_Http_Client::PUT, $headers, false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if (!$response->isSuccessful()) {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Set blob properties
+	 *
+	 * All available properties are listed at http://msdn.microsoft.com/en-us/library/ee691966.aspx and should be provided in the $additionalHeaders parameter.
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param string $leaseId            Lease identifier
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function setBlobProperties($containerName = '', $blobName = '', $leaseId = null, $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+		if (count($additionalHeaders) == 0) {
+			throw new Zend_Service_WindowsAzure_Exception('No additional headers are specified.');
+		}
+
+		// Create headers
+		$headers = array();
+
+		// Lease set?
+		if ($leaseId !== null) {
+			$headers['x-ms-lease-id'] = $leaseId;
+		}
+
+		// Additional headers?
+		foreach ($additionalHeaders as $key => $value) {
+			$headers[$key] = $value;
+		}
+
+		// Perform request
+		$response = $this->_performRequest($containerName . '/' . $blobName, '?comp=properties', Zend_Http_Client::PUT, $headers, false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if (!$response->isSuccessful()) {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Get blob properties
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param string $snapshotId         Snapshot identifier
+	 * @param string $leaseId            Lease identifier
+	 * @return Zend_Service_WindowsAzure_Storage_BlobInstance
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function getBlobProperties($containerName = '', $blobName = '', $snapshotId = null, $leaseId = null)
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+
+		return $this->getBlobInstance($containerName, $blobName, $snapshotId, $leaseId);
+	}
+
+	/**
+	 * Delete blob
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param string $snapshotId         Snapshot identifier
+	 * @param string $leaseId            Lease identifier
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function deleteBlob($containerName = '', $blobName = '', $snapshotId = null, $leaseId = null, $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+
+		// Build query string
+		$queryString = array();
+		if ($snapshotId !== null) {
+			$queryString[] = 'snapshot=' . $snapshotId;
+		}
+		$queryString = self::createQueryStringFromArray($queryString);
+			
+		// Additional headers?
+		$headers = array();
+		if ($leaseId !== null) {
+			$headers['x-ms-lease-id'] = $leaseId;
+		}
+		foreach ($additionalHeaders as $key => $value) {
+			$headers[$key] = $value;
+		}
+
+		// Resource name
+		$resourceName = self::createResourceName($containerName , $blobName);
+
+		// Perform request
+		$response = $this->_performRequest($resourceName, $queryString, Zend_Http_Client::DELETE, $headers, false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if (!$response->isSuccessful()) {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Snapshot blob
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param array  $metadata           Key/value pairs of meta data
+	 * @param array  $additionalHeaders  Additional headers. See http://msdn.microsoft.com/en-us/library/dd179371.aspx for more information.
+	 * @return string Date/Time value representing the snapshot identifier.
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function snapshotBlob($containerName = '', $blobName = '', $metadata = array(), $additionalHeaders = array())
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+
+		// Additional headers?
+		$headers = array();
+		foreach ($additionalHeaders as $key => $value) {
+			$headers[$key] = $value;
+		}
+
+		// Resource name
+		$resourceName = self::createResourceName($containerName , $blobName);
+
+		// Perform request
+		$response = $this->_performRequest($resourceName, '?comp=snapshot', Zend_Http_Client::PUT, $headers, false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if ($response->isSuccessful()) {
+			return $response->getHeader('x-ms-snapshot');
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Lease blob - See (http://msdn.microsoft.com/en-us/library/ee691972.aspx)
+	 *
+	 * @param string $containerName      Container name
+	 * @param string $blobName           Blob name
+	 * @param string $leaseAction        Lease action (Zend_Service_WindowsAzure_Storage_Blob::LEASE_*)
+	 * @param string $leaseId            Lease identifier, required to renew the lease or to release the lease.
+	 * @return Zend_Service_WindowsAzure_Storage_LeaseInstance Lease instance
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function leaseBlob($containerName = '', $blobName = '', $leaseAction = self::LEASE_ACQUIRE, $leaseId = null)
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+		if ($blobName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Blob name is not specified.');
+		}
+		if ($containerName === '$root' && strpos($blobName, '/') !== false) {
+			throw new Zend_Service_WindowsAzure_Exception('Blobs stored in the root container can not have a name containing a forward slash (/).');
+		}
+
+		// Additional headers?
+		$headers = array();
+		$headers['x-ms-lease-action'] = strtolower($leaseAction);
+		if ($leaseId !== null) {
+			$headers['x-ms-lease-id'] = $leaseId;
+		}
+
+		// Resource name
+		$resourceName = self::createResourceName($containerName , $blobName);
+
+		// Perform request
+		$response = $this->_performRequest($resourceName, '?comp=lease', Zend_Http_Client::PUT, $headers, false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_WRITE);
+		if ($response->isSuccessful()) {
+			return new Zend_Service_WindowsAzure_Storage_LeaseInstance(
+			$containerName,
+			$blobName,
+			$response->getHeader('x-ms-lease-id'),
+			$response->getHeader('x-ms-lease-time'));
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * List blobs
+	 *
+	 * @param string $containerName Container name
+	 * @param string $prefix     Optional. Filters the results to return only blobs whose name begins with the specified prefix.
+	 * @param string $delimiter  Optional. Delimiter, i.e. '/', for specifying folder hierarchy
+	 * @param int    $maxResults Optional. Specifies the maximum number of blobs to return per call to Azure storage. This does NOT affect list size returned by this function. (maximum: 5000)
+	 * @param string $marker     Optional string value that identifies the portion of the list to be returned with the next list operation.
+	 * @param string $include    Optional. Specifies that the response should include one or more of the following subsets: '', 'metadata', 'snapshots', 'uncommittedblobs'). Multiple values can be added separated with a comma (,)
+	 * @param int    $currentResultCount Current result count (internal use)
+	 * @return array
+	 * @throws Zend_Service_WindowsAzure_Exception
+	 */
+	public function listBlobs($containerName = '', $prefix = '', $delimiter = '', $maxResults = null, $marker = null, $include = null, $currentResultCount = 0)
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+			
+		// Build query string
+		$queryString = array('restype=container', 'comp=list');
+		if ($prefix !== null) {
+			$queryString[] = 'prefix=' . $prefix;
+		}
+		if ($delimiter !== '') {
+			$queryString[] = 'delimiter=' . $delimiter;
+		}
+		if ($maxResults !== null) {
+			$queryString[] = 'maxresults=' . $maxResults;
+		}
+		if ($marker !== null) {
+			$queryString[] = 'marker=' . $marker;
+		}
+		if ($include !== null) {
+			$queryString[] = 'include=' . $include;
+		}
+		$queryString = self::createQueryStringFromArray($queryString);
+
+		// Perform request
+		$response = $this->_performRequest($containerName, $queryString, Zend_Http_Client::GET, array(), false, null, Zend_Service_WindowsAzure_Storage::RESOURCE_BLOB, Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_LIST);
+		if ($response->isSuccessful()) {
+			// Return value
+			$blobs = array();
+
+			// Blobs
+			$xmlBlobs = $this->_parseResponse($response)->Blobs->Blob;
+			if ($xmlBlobs !== null) {
+				for ($i = 0; $i < count($xmlBlobs); $i++) {
+					$properties = (array)$xmlBlobs[$i]->Properties;
+						
+					$blobs[] = new Zend_Service_WindowsAzure_Storage_BlobInstance(
+					$containerName,
+					(string)$xmlBlobs[$i]->Name,
+					(string)$xmlBlobs[$i]->Snapshot,
+					(string)$properties['Etag'],
+					(string)$properties['Last-Modified'],
+					(string)$xmlBlobs[$i]->Url,
+					(string)$properties['Content-Length'],
+					(string)$properties['Content-Type'],
+					(string)$properties['Content-Encoding'],
+					(string)$properties['Content-Language'],
+					(string)$properties['Cache-Control'],
+					(string)$properties['BlobType'],
+					(string)$properties['LeaseStatus'],
+					false,
+					$this->_parseMetadataElement($xmlBlobs[$i])
+					);
+				}
+			}
+				
+			// Blob prefixes (folders)
+			$xmlBlobs = $this->_parseResponse($response)->Blobs->BlobPrefix;
+				
+			if ($xmlBlobs !== null) {
+				for ($i = 0; $i < count($xmlBlobs); $i++) {
+					$blobs[] = new Zend_Service_WindowsAzure_Storage_BlobInstance(
+					$containerName,
+					(string)$xmlBlobs[$i]->Name,
+					null,
+						'',
+						'',
+						'',
+					0,
+						'',
+						'',
+						'',
+						'',
+						'',
+						'',
+					true,
+					$this->_parseMetadataElement($xmlBlobs[$i])
+					);
+				}
+			}
+				
+			// More blobs?
+			$xmlMarker = (string)$this->_parseResponse($response)->NextMarker;
+			$currentResultCount = $currentResultCount + count($blobs);
+			if ($maxResults !== null && $currentResultCount < $maxResults) {
+				if ($xmlMarker !== null && $xmlMarker != '') {
+					$blobs = array_merge($blobs, $this->listBlobs($containerName, $prefix, $delimiter, $maxResults, $marker, $include, $currentResultCount));
+				}
+			}
+			if ($maxResults !== null && count($blobs) > $maxResults) {
+				$blobs = array_slice($blobs, 0, $maxResults);
+			}
+				
+			return $blobs;
+		} else {
+			throw new Zend_Service_WindowsAzure_Exception($this->_getErrorMessage($response, 'Resource could not be accessed.'));
+		}
+	}
+
+	/**
+	 * Generate shared access URL
+	 *
+	 * @param string $containerName  Container name
+	 * @param string $blobName       Blob name
+	 * @param string $resource       Signed resource - container (c) - blob (b)
+	 * @param string $permissions    Signed permissions - read (r), write (w), delete (d) and list (l)
+	 * @param string $start          The time at which the Shared Access Signature becomes valid.
+	 * @param string $expiry         The time at which the Shared Access Signature becomes invalid.
+	 * @param string $identifier     Signed identifier
+	 * @return string
+	 */
+	public function generateSharedAccessUrl($containerName = '', $blobName = '', $resource = 'b', $permissions = 'r', $start = '', $expiry = '', $identifier = '')
+	{
+		if ($containerName === '') {
+			throw new Zend_Service_WindowsAzure_Exception('Container name is not specified.');
+		}
+		if (!self::isValidContainerName($containerName)) {
+			throw new Zend_Service_WindowsAzure_Exception('Container name does not adhere to container naming conventions. See http://msdn.microsoft.com/en-us/library/dd135715.aspx for more information.');
+		}
+
+		// Resource name
+		$resourceName = self::createResourceName($containerName , $blobName);
+
+		// Generate URL
+		return $this->getBaseUrl() . '/' . $resourceName . '?' .
+		$this->_sharedAccessSignatureCredentials->createSignedQueryString(
+		$resourceName,
+		        '',
+		$resource,
+		$permissions,
+		$start,
+		$expiry,
+		$identifier);
+	}
+
+	/**
+	 * Register this object as stream wrapper client
+	 *
+	 * @param  string $name Protocol name
+	 * @return Zend_Service_WindowsAzure_Storage_Blob
+	 */
+	public function registerAsClient($name)
+	{
+		self::$_wrapperClients[$name] = $this;
+		return $this;
+	}
+
+	/**
+	 * Unregister this object as stream wrapper client
+	 *
+	 * @param  string $name Protocol name
+	 * @return Zend_Service_WindowsAzure_Storage_Blob
+	 */
+	public function unregisterAsClient($name)
+	{
+		unset(self::$_wrapperClients[$name]);
+		return $this;
+	}
+
+	/**
+	 * Get wrapper client for stream type
+	 *
+	 * @param  string $name Protocol name
+	 * @return Zend_Service_WindowsAzure_Storage_Blob
+	 */
+	public static function getWrapperClient($name)
+	{
+		return self::$_wrapperClients[$name];
+	}
+
+	/**
+	 * Register this object as stream wrapper
+	 *
+	 * @param  string $name Protocol name
+	 */
+	public function registerStreamWrapper($name = 'azure')
+	{
+		/**
+		 * @see Zend_Service_WindowsAzure_Storage_Blob_Stream
+		 */
+		require_once 'Zend/Service/WindowsAzure/Storage/Blob/Stream.php';
+
+		stream_register_wrapper($name, 'Zend_Service_WindowsAzure_Storage_Blob_Stream');
+		$this->registerAsClient($name);
+	}
+
+	/**
+	 * Unregister this object as stream wrapper
+	 *
+	 * @param  string $name Protocol name
+	 * @return Zend_Service_WindowsAzure_Storage_Blob
+	 */
+	public function unregisterStreamWrapper($name = 'azure')
+	{
+		stream_wrapper_unregister($name);
+		$this->unregisterAsClient($name);
+	}
+
+	/**
+	 * Create resource name
+	 *
+	 * @param string $containerName  Container name
+	 * @param string $blobName Blob name
+	 * @return string
+	 */
+	public static function createResourceName($containerName = '', $blobName = '')
+	{
+		// Resource name
+		$resourceName = $containerName . '/' . $blobName;
+		if ($containerName === '' || $containerName === '$root') {
+			$resourceName = $blobName;
+		}
+		if ($blobName === '') {
+			$resourceName = $containerName;
+		}
+
+		return $resourceName;
+	}
+
+	/**
+	 * Is valid container name?
+	 *
+	 * @param string $containerName Container name
+	 * @return boolean
+	 */
+	public static function isValidContainerName($containerName = '')
+	{
+		if ($containerName == '$root') {
+			return true;
+		}
+
+		if (preg_match("/^[a-z0-9][a-z0-9-]*$/", $containerName) === 0) {
+			return false;
+		}
+
+		if (strpos($containerName, '--') !== false) {
+			return false;
+		}
+
+		if (strtolower($containerName) != $containerName) {
+			return false;
+		}
+
+		if (strlen($containerName) < 3 || strlen($containerName) > 63) {
+			return false;
+		}
+
+		if (substr($containerName, -1) == '-') {
+			return false;
+		}
+
+		return true;
+	}
+
+	/**
+	 * Get error message from Zend_Http_Response
+	 *
+	 * @param Zend_Http_Response $response Repsonse
+	 * @param string $alternativeError Alternative error message
+	 * @return string
+	 */
+	protected function _getErrorMessage(Zend_Http_Response $response, $alternativeError = 'Unknown error.')
+	{
+		$response = $this->_parseResponse($response);
+		if ($response && $response->Message) {
+			return (string)$response->Message;
+		} else {
+			return $alternativeError;
+		}
+	}
+
+	/**
+	 * Generate block id
+	 *
+	 * @param int $part Block number
+	 * @return string Windows Azure Blob Storage block number
+	 */
+	protected function _generateBlockId($part = 0)
+	{
+		$returnValue = $part;
+		while (strlen($returnValue) < 64) {
+			$returnValue = '0' . $returnValue;
+		}
+
+		return $returnValue;
+	}
+}