<?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) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Storage.php 24594 2012-01-05 21:27:01Z matthew $
*/
/**
* @see Zend_Service_WindowsAzure_Credentials_CredentialsAbstract
*/
require_once 'Zend/Service/WindowsAzure/Credentials/CredentialsAbstract.php';
/**
* @see Zend_Service_WindowsAzure_Credentials_SharedKey
*/
require_once 'Zend/Service/WindowsAzure/Credentials/SharedKey.php';
/**
* @see Zend_Service_WindowsAzure_RetryPolicy_RetryPolicyAbstract
*/
require_once 'Zend/Service/WindowsAzure/RetryPolicy/RetryPolicyAbstract.php';
/**
* @see Zend_Service_WindowsAzure_Exception
*/
require_once 'Zend/Service/WindowsAzure/Exception.php';
/**
* @see Zend_Http_Client
*/
require_once 'Zend/Http/Client.php';
/**
* @see Zend_Http_Response
*/
require_once 'Zend/Http/Response.php';
/**
* @category Zend
* @package Zend_Service_WindowsAzure
* @subpackage Storage
* @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Service_WindowsAzure_Storage
{
/**
* Development storage URLS
*/
const URL_DEV_BLOB = "127.0.0.1:10000";
const URL_DEV_QUEUE = "127.0.0.1:10001";
const URL_DEV_TABLE = "127.0.0.1:10002";
/**
* Live storage URLS
*/
const URL_CLOUD_BLOB = "blob.core.windows.net";
const URL_CLOUD_QUEUE = "queue.core.windows.net";
const URL_CLOUD_TABLE = "table.core.windows.net";
/**
* Resource types
*/
const RESOURCE_UNKNOWN = "unknown";
const RESOURCE_CONTAINER = "c";
const RESOURCE_BLOB = "b";
const RESOURCE_TABLE = "t";
const RESOURCE_ENTITY = "e";
const RESOURCE_QUEUE = "q";
/**
* HTTP header prefixes
*/
const PREFIX_PROPERTIES = "x-ms-prop-";
const PREFIX_METADATA = "x-ms-meta-";
const PREFIX_STORAGE_HEADER = "x-ms-";
/**
* Current API version
*
* @var string
*/
protected $_apiVersion = '2009-09-19';
/**
* Storage host name
*
* @var string
*/
protected $_host = '';
/**
* Account name for Windows Azure
*
* @var string
*/
protected $_accountName = '';
/**
* Account key for Windows Azure
*
* @var string
*/
protected $_accountKey = '';
/**
* Use path-style URI's
*
* @var boolean
*/
protected $_usePathStyleUri = false;
/**
* Zend_Service_WindowsAzure_Credentials_CredentialsAbstract instance
*
* @var Zend_Service_WindowsAzure_Credentials_CredentialsAbstract
*/
protected $_credentials = null;
/**
* Zend_Service_WindowsAzure_RetryPolicy_RetryPolicyAbstract instance
*
* @var Zend_Service_WindowsAzure_RetryPolicy_RetryPolicyAbstract
*/
protected $_retryPolicy = null;
/**
* Zend_Http_Client channel used for communication with REST services
*
* @var Zend_Http_Client
*/
protected $_httpClientChannel = null;
/**
* Use proxy?
*
* @var boolean
*/
protected $_useProxy = false;
/**
* Proxy url
*
* @var string
*/
protected $_proxyUrl = '';
/**
* Proxy port
*
* @var int
*/
protected $_proxyPort = 80;
/**
* Proxy credentials
*
* @var string
*/
protected $_proxyCredentials = '';
/**
* Creates a new Zend_Service_WindowsAzure_Storage 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 = self::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
) {
$this->_host = $host;
$this->_accountName = $accountName;
$this->_accountKey = $accountKey;
$this->_usePathStyleUri = $usePathStyleUri;
// Using local storage?
if (!$this->_usePathStyleUri
&& ($this->_host == self::URL_DEV_BLOB
|| $this->_host == self::URL_DEV_QUEUE
|| $this->_host == self::URL_DEV_TABLE)
) {
// Local storage
$this->_usePathStyleUri = true;
}
if ($this->_credentials === null) {
$this->_credentials = new Zend_Service_WindowsAzure_Credentials_SharedKey(
$this->_accountName, $this->_accountKey, $this->_usePathStyleUri);
}
$this->_retryPolicy = $retryPolicy;
if ($this->_retryPolicy === null) {
$this->_retryPolicy = Zend_Service_WindowsAzure_RetryPolicy_RetryPolicyAbstract::noRetry();
}
// Setup default Zend_Http_Client channel
$options = array(
'adapter' => 'Zend_Http_Client_Adapter_Proxy'
);
if (function_exists('curl_init')) {
// Set cURL options if cURL is used afterwards
$options['curloptions'] = array(
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_TIMEOUT => 120,
);
}
$this->_httpClientChannel = new Zend_Http_Client(null, $options);
}
/**
* Set the HTTP client channel to use
*
* @param Zend_Http_Client_Adapter_Interface|string $adapterInstance Adapter instance or adapter class name.
*/
public function setHttpClientChannel($adapterInstance = 'Zend_Http_Client_Adapter_Proxy')
{
$this->_httpClientChannel->setAdapter($adapterInstance);
}
/**
* Retrieve HTTP client channel
*
* @return Zend_Http_Client_Adapter_Interface
*/
public function getHttpClientChannel()
{
return $this->_httpClientChannel;
}
/**
* Set retry policy to use when making requests
*
* @param Zend_Service_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy Retry policy to use when making requests
*/
public function setRetryPolicy(Zend_Service_WindowsAzure_RetryPolicy_RetryPolicyAbstract $retryPolicy = null)
{
$this->_retryPolicy = $retryPolicy;
if ($this->_retryPolicy === null) {
$this->_retryPolicy = Zend_Service_WindowsAzure_RetryPolicy_RetryPolicyAbstract::noRetry();
}
}
/**
* Set proxy
*
* @param boolean $useProxy Use proxy?
* @param string $proxyUrl Proxy URL
* @param int $proxyPort Proxy port
* @param string $proxyCredentials Proxy credentials
*/
public function setProxy($useProxy = false, $proxyUrl = '', $proxyPort = 80, $proxyCredentials = '')
{
$this->_useProxy = $useProxy;
$this->_proxyUrl = $proxyUrl;
$this->_proxyPort = $proxyPort;
$this->_proxyCredentials = $proxyCredentials;
if ($this->_useProxy) {
$credentials = explode(':', $this->_proxyCredentials);
$this->_httpClientChannel->setConfig(array(
'proxy_host' => $this->_proxyUrl,
'proxy_port' => $this->_proxyPort,
'proxy_user' => $credentials[0],
'proxy_pass' => $credentials[1],
));
} else {
$this->_httpClientChannel->setConfig(array(
'proxy_host' => '',
'proxy_port' => 8080,
'proxy_user' => '',
'proxy_pass' => '',
));
}
}
/**
* Returns the Windows Azure account name
*
* @return string
*/
public function getAccountName()
{
return $this->_accountName;
}
/**
* Get base URL for creating requests
*
* @return string
*/
public function getBaseUrl()
{
if ($this->_usePathStyleUri) {
return 'http://' . $this->_host . '/' . $this->_accountName;
} else {
return 'http://' . $this->_accountName . '.' . $this->_host;
}
}
/**
* Set Zend_Service_WindowsAzure_Credentials_CredentialsAbstract instance
*
* @param Zend_Service_WindowsAzure_Credentials_CredentialsAbstract $credentials Zend_Service_WindowsAzure_Credentials_CredentialsAbstract instance to use for request signing.
*/
public function setCredentials(Zend_Service_WindowsAzure_Credentials_CredentialsAbstract $credentials)
{
$this->_credentials = $credentials;
$this->_credentials->setAccountName($this->_accountName);
$this->_credentials->setAccountkey($this->_accountKey);
$this->_credentials->setUsePathStyleUri($this->_usePathStyleUri);
}
/**
* Get Zend_Service_WindowsAzure_Credentials_CredentialsAbstract instance
*
* @return Zend_Service_WindowsAzure_Credentials_CredentialsAbstract
*/
public function getCredentials()
{
return $this->_credentials;
}
/**
* Perform request using Zend_Http_Client channel
*
* @param string $path Path
* @param string $queryString Query string
* @param string $httpVerb HTTP verb the request will use
* @param array $headers x-ms headers to add
* @param boolean $forTableStorage Is the request for table storage?
* @param mixed $rawData Optional RAW HTTP data to be sent over the wire
* @param string $resourceType Resource type
* @param string $requiredPermission Required permission
* @return Zend_Http_Response
*/
protected function _performRequest(
$path = '/',
$queryString = '',
$httpVerb = Zend_Http_Client::GET,
$headers = array(),
$forTableStorage = false,
$rawData = null,
$resourceType = Zend_Service_WindowsAzure_Storage::RESOURCE_UNKNOWN,
$requiredPermission = Zend_Service_WindowsAzure_Credentials_CredentialsAbstract::PERMISSION_READ
) {
// Clean path
if (strpos($path, '/') !== 0) {
$path = '/' . $path;
}
// Clean headers
if ($headers === null) {
$headers = array();
}
// Ensure cUrl will also work correctly:
// - disable Content-Type if required
// - disable Expect: 100 Continue
if (!isset($headers["Content-Type"])) {
$headers["Content-Type"] = '';
}
$headers["Expect"]= '';
// Add version header
$headers['x-ms-version'] = $this->_apiVersion;
// URL encoding
$path = self::urlencode($path);
$queryString = self::urlencode($queryString);
// 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, $rawData);
// 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;
}
/**
* Parse result from Zend_Http_Response
*
* @param Zend_Http_Response $response Response from HTTP call
* @return object
* @throws Zend_Service_WindowsAzure_Exception
*/
protected function _parseResponse(Zend_Http_Response $response = null)
{
if ($response === null) {
throw new Zend_Service_WindowsAzure_Exception('Response should not be null.');
}
$xml = @simplexml_load_string($response->getBody());
if ($xml !== false) {
// Fetch all namespaces
$namespaces = array_merge($xml->getNamespaces(true), $xml->getDocNamespaces(true));
// Register all namespace prefixes
foreach ($namespaces as $prefix => $ns) {
if ($prefix != '') {
$xml->registerXPathNamespace($prefix, $ns);
}
}
}
return $xml;
}
/**
* Generate metadata headers
*
* @param array $metadata
* @return HTTP headers containing metadata
*/
protected function _generateMetadataHeaders($metadata = array())
{
// Validate
if (!is_array($metadata)) {
return array();
}
// Return headers
$headers = array();
foreach ($metadata as $key => $value) {
if (strpos($value, "\r") !== false || strpos($value, "\n") !== false) {
throw new Zend_Service_WindowsAzure_Exception('Metadata cannot contain newline characters.');
}
if (!self::isValidMetadataName($key)) {
throw new Zend_Service_WindowsAzure_Exception('Metadata name does not adhere to metadata naming conventions. See http://msdn.microsoft.com/en-us/library/aa664670(VS.71).aspx for more information.');
}
$headers["x-ms-meta-" . strtolower($key)] = $value;
}
return $headers;
}
/**
* Parse metadata headers
*
* @param array $headers HTTP headers containing metadata
* @return array
*/
protected function _parseMetadataHeaders($headers = array())
{
// Validate
if (!is_array($headers)) {
return array();
}
// Return metadata
$metadata = array();
foreach ($headers as $key => $value) {
if (substr(strtolower($key), 0, 10) == "x-ms-meta-") {
$metadata[str_replace("x-ms-meta-", '', strtolower($key))] = $value;
}
}
return $metadata;
}
/**
* Parse metadata XML
*
* @param SimpleXMLElement $parentElement Element containing the Metadata element.
* @return array
*/
protected function _parseMetadataElement($element = null)
{
// Metadata present?
if ($element !== null && isset($element->Metadata) && $element->Metadata !== null) {
return get_object_vars($element->Metadata);
}
return array();
}
/**
* Generate ISO 8601 compliant date string in UTC time zone
*
* @param int $timestamp
* @return string
*/
public function isoDate($timestamp = null)
{
$tz = @date_default_timezone_get();
@date_default_timezone_set('UTC');
if ($timestamp === null) {
$timestamp = time();
}
$returnValue = str_replace('+00:00', '.0000000Z', @date('c', $timestamp));
@date_default_timezone_set($tz);
return $returnValue;
}
/**
* URL encode function
*
* @param string $value Value to encode
* @return string Encoded value
*/
public static function urlencode($value)
{
return str_replace(' ', '%20', $value);
}
/**
* Is valid metadata name?
*
* @param string $metadataName Metadata name
* @return boolean
*/
public static function isValidMetadataName($metadataName = '')
{
if (preg_match("/^[a-zA-Z0-9_@][a-zA-Z0-9_]*$/", $metadataName) === 0) {
return false;
}
if ($metadataName == '') {
return false;
}
return true;
}
/**
* Builds a query string from an array of elements
*
* @param array Array of elements
* @return string Assembled query string
*/
public static function createQueryStringFromArray($queryString)
{
return count($queryString) > 0 ? '?' . implode('&', $queryString) : '';
}
}