--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/web/Zend/Service/Amazon/Ec2/Abstract.php Mon Dec 13 18:29:26 2010 +0100
@@ -0,0 +1,277 @@
+<?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_Amazon
+ * @subpackage Ec2
+ * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ * @version $Id: Abstract.php 20096 2010-01-06 02:05:09Z bkarwin $
+ */
+
+/**
+ * @see Zend_Service_Amazon_Abstract
+ */
+require_once 'Zend/Service/Amazon/Abstract.php';
+
+/**
+ * @see Zend_Service_Amazon_Ec2_Response
+ */
+require_once 'Zend/Service/Amazon/Ec2/Response.php';
+
+/**
+ * @see Zend_Service_Amazon_Ec2_Exception
+ */
+require_once 'Zend/Service/Amazon/Ec2/Exception.php';
+
+/**
+ * Provides the basic functionality to send a request to the Amazon Ec2 Query API
+ *
+ * @category Zend
+ * @package Zend_Service_Amazon
+ * @subpackage Ec2
+ * @copyright Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ */
+abstract class Zend_Service_Amazon_Ec2_Abstract extends Zend_Service_Amazon_Abstract
+{
+ /**
+ * The HTTP query server
+ */
+ protected $_ec2Endpoint = 'ec2.amazonaws.com';
+
+ /**
+ * The API version to use
+ */
+ protected $_ec2ApiVersion = '2009-04-04';
+
+ /**
+ * Signature Version
+ */
+ protected $_ec2SignatureVersion = '2';
+
+ /**
+ * Signature Encoding Method
+ */
+ protected $_ec2SignatureMethod = 'HmacSHA256';
+
+ /**
+ * Period after which HTTP request will timeout in seconds
+ */
+ protected $_httpTimeout = 10;
+
+ /**
+ * @var string Amazon Region
+ */
+ protected static $_defaultRegion = null;
+
+ /**
+ * @var string Amazon Region
+ */
+ protected $_region;
+
+ /**
+ * An array that contains all the valid Amazon Ec2 Regions.
+ *
+ * @var array
+ */
+ protected static $_validEc2Regions = array('eu-west-1', 'us-east-1');
+
+ /**
+ * Create Amazon client.
+ *
+ * @param string $access_key Override the default Access Key
+ * @param string $secret_key Override the default Secret Key
+ * @param string $region Sets the AWS Region
+ * @return void
+ */
+ public function __construct($accessKey=null, $secretKey=null, $region=null)
+ {
+ if(!$region) {
+ $region = self::$_defaultRegion;
+ } else {
+ // make rue the region is valid
+ if(!empty($region) && !in_array(strtolower($region), self::$_validEc2Regions, true)) {
+ require_once 'Zend/Service/Amazon/Exception.php';
+ throw new Zend_Service_Amazon_Exception('Invalid Amazon Ec2 Region');
+ }
+ }
+
+ $this->_region = $region;
+
+ parent::__construct($accessKey, $secretKey);
+ }
+
+ /**
+ * Set which region you are working in. It will append the
+ * end point automaticly
+ *
+ * @param string $region
+ */
+ public static function setRegion($region)
+ {
+ if(in_array(strtolower($region), self::$_validEc2Regions, true)) {
+ self::$_defaultRegion = $region;
+ } else {
+ require_once 'Zend/Service/Amazon/Exception.php';
+ throw new Zend_Service_Amazon_Exception('Invalid Amazon Ec2 Region');
+ }
+ }
+
+ /**
+ * Method to fetch the AWS Region
+ *
+ * @return string
+ */
+ protected function _getRegion()
+ {
+ return (!empty($this->_region)) ? $this->_region . '.' : '';
+ }
+
+ /**
+ * Sends a HTTP request to the queue service using Zend_Http_Client
+ *
+ * @param array $params List of parameters to send with the request
+ * @return Zend_Service_Amazon_Ec2_Response
+ * @throws Zend_Service_Amazon_Ec2_Exception
+ */
+ protected function sendRequest(array $params = array())
+ {
+ $url = 'https://' . $this->_getRegion() . $this->_ec2Endpoint . '/';
+
+ $params = $this->addRequiredParameters($params);
+
+ try {
+ /* @var $request Zend_Http_Client */
+ $request = self::getHttpClient();
+ $request->resetParameters();
+
+ $request->setConfig(array(
+ 'timeout' => $this->_httpTimeout
+ ));
+
+ $request->setUri($url);
+ $request->setMethod(Zend_Http_Client::POST);
+ $request->setParameterPost($params);
+
+ $httpResponse = $request->request();
+
+
+ } catch (Zend_Http_Client_Exception $zhce) {
+ $message = 'Error in request to AWS service: ' . $zhce->getMessage();
+ throw new Zend_Service_Amazon_Ec2_Exception($message, $zhce->getCode(), $zhce);
+ }
+ $response = new Zend_Service_Amazon_Ec2_Response($httpResponse);
+ $this->checkForErrors($response);
+
+ return $response;
+ }
+
+ /**
+ * Adds required authentication and version parameters to an array of
+ * parameters
+ *
+ * The required parameters are:
+ * - AWSAccessKey
+ * - SignatureVersion
+ * - Timestamp
+ * - Version and
+ * - Signature
+ *
+ * If a required parameter is already set in the <tt>$parameters</tt> array,
+ * it is overwritten.
+ *
+ * @param array $parameters the array to which to add the required
+ * parameters.
+ *
+ * @return array
+ */
+ protected function addRequiredParameters(array $parameters)
+ {
+ $parameters['AWSAccessKeyId'] = $this->_getAccessKey();
+ $parameters['SignatureVersion'] = $this->_ec2SignatureVersion;
+ $parameters['Timestamp'] = gmdate('Y-m-d\TH:i:s\Z');
+ $parameters['Version'] = $this->_ec2ApiVersion;
+ $parameters['SignatureMethod'] = $this->_ec2SignatureMethod;
+ $parameters['Signature'] = $this->signParameters($parameters);
+
+ return $parameters;
+ }
+
+ /**
+ * Computes the RFC 2104-compliant HMAC signature for request parameters
+ *
+ * This implements the Amazon Web Services signature, as per the following
+ * specification:
+ *
+ * 1. Sort all request parameters (including <tt>SignatureVersion</tt> and
+ * excluding <tt>Signature</tt>, the value of which is being created),
+ * ignoring case.
+ *
+ * 2. Iterate over the sorted list and append the parameter name (in its
+ * original case) and then its value. Do not URL-encode the parameter
+ * values before constructing this string. Do not use any separator
+ * characters when appending strings.
+ *
+ * @param array $parameters the parameters for which to get the signature.
+ * @param string $secretKey the secret key to use to sign the parameters.
+ *
+ * @return string the signed data.
+ */
+ protected function signParameters(array $paramaters)
+ {
+ $data = "POST\n";
+ $data .= $this->_getRegion() . $this->_ec2Endpoint . "\n";
+ $data .= "/\n";
+
+ uksort($paramaters, 'strcmp');
+ unset($paramaters['Signature']);
+
+ $arrData = array();
+ foreach($paramaters as $key => $value) {
+ $arrData[] = $key . '=' . str_replace("%7E", "~", rawurlencode($value));
+ }
+
+ $data .= implode('&', $arrData);
+
+ require_once 'Zend/Crypt/Hmac.php';
+ $hmac = Zend_Crypt_Hmac::compute($this->_getSecretKey(), 'SHA256', $data, Zend_Crypt_Hmac::BINARY);
+
+ return base64_encode($hmac);
+ }
+
+ /**
+ * Checks for errors responses from Amazon
+ *
+ * @param Zend_Service_Amazon_Ec2_Response $response the response object to
+ * check.
+ *
+ * @return void
+ *
+ * @throws Zend_Service_Amazon_Ec2_Exception if one or more errors are
+ * returned from Amazon.
+ */
+ private function checkForErrors(Zend_Service_Amazon_Ec2_Response $response)
+ {
+ $xpath = new DOMXPath($response->getDocument());
+ $list = $xpath->query('//Error');
+ if ($list->length > 0) {
+ $node = $list->item(0);
+ $code = $xpath->evaluate('string(Code/text())', $node);
+ $message = $xpath->evaluate('string(Message/text())', $node);
+ throw new Zend_Service_Amazon_Ec2_Exception($message, 0, $code);
+ }
+
+ }
+}