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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Service
* @subpackage Amazon
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Amazon.php 18951 2009-11-12 16:26:19Z alexander $
*/
/**
* @see Zend_Rest_Client
*/
require_once 'Zend/Rest/Client.php';
/**
* @category Zend
* @package Zend_Service
* @subpackage Amazon
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Service_Amazon
{
/**
* Amazon Web Services Access Key ID
*
* @var string
*/
public $appId;
/**
* @var string
*/
protected $_secretKey = null;
/**
* @var string
*/
protected $_baseUri = null;
/**
* List of Amazon Web Service base URLs, indexed by country code
*
* @var array
*/
protected $_baseUriList = array('US' => 'http://webservices.amazon.com',
'UK' => 'http://webservices.amazon.co.uk',
'DE' => 'http://webservices.amazon.de',
'JP' => 'http://webservices.amazon.co.jp',
'FR' => 'http://webservices.amazon.fr',
'CA' => 'http://webservices.amazon.ca');
/**
* Reference to REST client object
*
* @var Zend_Rest_Client
*/
protected $_rest = null;
/**
* Constructs a new Amazon Web Services Client
*
* @param string $appId Developer's Amazon appid
* @param string $countryCode Country code for Amazon service; may be US, UK, DE, JP, FR, CA
* @throws Zend_Service_Exception
* @return Zend_Service_Amazon
*/
public function __construct($appId, $countryCode = 'US', $secretKey = null)
{
$this->appId = (string) $appId;
$this->_secretKey = $secretKey;
$countryCode = (string) $countryCode;
if (!isset($this->_baseUriList[$countryCode])) {
/**
* @see Zend_Service_Exception
*/
require_once 'Zend/Service/Exception.php';
throw new Zend_Service_Exception("Unknown country code: $countryCode");
}
$this->_baseUri = $this->_baseUriList[$countryCode];
}
/**
* Search for Items
*
* @param array $options Options to use for the Search Query
* @throws Zend_Service_Exception
* @return Zend_Service_Amazon_ResultSet
* @see http://www.amazon.com/gp/aws/sdk/main.html/102-9041115-9057709?s=AWSEcommerceService&v=2005-10-05&p=ApiReference/ItemSearchOperation
*/
public function itemSearch(array $options)
{
$client = $this->getRestClient();
$client->setUri($this->_baseUri);
$defaultOptions = array('ResponseGroup' => 'Small');
$options = $this->_prepareOptions('ItemSearch', $options, $defaultOptions);
$client->getHttpClient()->resetParameters();
$response = $client->restGet('/onca/xml', $options);
if ($response->isError()) {
/**
* @see Zend_Service_Exception
*/
require_once 'Zend/Service/Exception.php';
throw new Zend_Service_Exception('An error occurred sending request. Status code: '
. $response->getStatus());
}
$dom = new DOMDocument();
$dom->loadXML($response->getBody());
self::_checkErrors($dom);
/**
* @see Zend_Service_Amazon_ResultSet
*/
require_once 'Zend/Service/Amazon/ResultSet.php';
return new Zend_Service_Amazon_ResultSet($dom);
}
/**
* Look up item(s) by ASIN
*
* @param string $asin Amazon ASIN ID
* @param array $options Query Options
* @see http://www.amazon.com/gp/aws/sdk/main.html/102-9041115-9057709?s=AWSEcommerceService&v=2005-10-05&p=ApiReference/ItemLookupOperation
* @throws Zend_Service_Exception
* @return Zend_Service_Amazon_Item|Zend_Service_Amazon_ResultSet
*/
public function itemLookup($asin, array $options = array())
{
$client = $this->getRestClient();
$client->setUri($this->_baseUri);
$client->getHttpClient()->resetParameters();
$defaultOptions = array('ResponseGroup' => 'Small');
$options['ItemId'] = (string) $asin;
$options = $this->_prepareOptions('ItemLookup', $options, $defaultOptions);
$response = $client->restGet('/onca/xml', $options);
if ($response->isError()) {
/**
* @see Zend_Service_Exception
*/
require_once 'Zend/Service/Exception.php';
throw new Zend_Service_Exception(
'An error occurred sending request. Status code: ' . $response->getStatus()
);
}
$dom = new DOMDocument();
$dom->loadXML($response->getBody());
self::_checkErrors($dom);
$xpath = new DOMXPath($dom);
$xpath->registerNamespace('az', 'http://webservices.amazon.com/AWSECommerceService/2005-10-05');
$items = $xpath->query('//az:Items/az:Item');
if ($items->length == 1) {
/**
* @see Zend_Service_Amazon_Item
*/
require_once 'Zend/Service/Amazon/Item.php';
return new Zend_Service_Amazon_Item($items->item(0));
}
/**
* @see Zend_Service_Amazon_ResultSet
*/
require_once 'Zend/Service/Amazon/ResultSet.php';
return new Zend_Service_Amazon_ResultSet($dom);
}
/**
* Returns a reference to the REST client
*
* @return Zend_Rest_Client
*/
public function getRestClient()
{
if($this->_rest === null) {
$this->_rest = new Zend_Rest_Client();
}
return $this->_rest;
}
/**
* Set REST client
*
* @param Zend_Rest_Client
* @return Zend_Service_Amazon
*/
public function setRestClient(Zend_Rest_Client $client)
{
$this->_rest = $client;
return $this;
}
/**
* Prepare options for request
*
* @param string $query Action to perform
* @param array $options User supplied options
* @param array $defaultOptions Default options
* @return array
*/
protected function _prepareOptions($query, array $options, array $defaultOptions)
{
$options['AWSAccessKeyId'] = $this->appId;
$options['Service'] = 'AWSECommerceService';
$options['Operation'] = (string) $query;
$options['Version'] = '2005-10-05';
// de-canonicalize out sort key
if (isset($options['ResponseGroup'])) {
$responseGroup = explode(',', $options['ResponseGroup']);
if (!in_array('Request', $responseGroup)) {
$responseGroup[] = 'Request';
$options['ResponseGroup'] = implode(',', $responseGroup);
}
}
$options = array_merge($defaultOptions, $options);
if($this->_secretKey !== null) {
$options['Timestamp'] = gmdate("Y-m-d\TH:i:s\Z");;
ksort($options);
$options['Signature'] = self::computeSignature($this->_baseUri, $this->_secretKey, $options);
}
return $options;
}
/**
* Compute Signature for Authentication with Amazon Product Advertising Webservices
*
* @param string $baseUri
* @param string $secretKey
* @param array $options
* @return string
*/
static public function computeSignature($baseUri, $secretKey, array $options)
{
require_once "Zend/Crypt/Hmac.php";
$signature = self::buildRawSignature($baseUri, $options);
return base64_encode(
Zend_Crypt_Hmac::compute($secretKey, 'sha256', $signature, Zend_Crypt_Hmac::BINARY)
);
}
/**
* Build the Raw Signature Text
*
* @param string $baseUri
* @param array $options
* @return string
*/
static public function buildRawSignature($baseUri, $options)
{
ksort($options);
$params = array();
foreach($options AS $k => $v) {
$params[] = $k."=".rawurlencode($v);
}
return sprintf("GET\n%s\n/onca/xml\n%s",
str_replace('http://', '', $baseUri),
implode("&", $params)
);
}
/**
* Check result for errors
*
* @param DOMDocument $dom
* @throws Zend_Service_Exception
* @return void
*/
protected static function _checkErrors(DOMDocument $dom)
{
$xpath = new DOMXPath($dom);
$xpath->registerNamespace('az', 'http://webservices.amazon.com/AWSECommerceService/2005-10-05');
if ($xpath->query('//az:Error')->length >= 1) {
$code = $xpath->query('//az:Error/az:Code/text()')->item(0)->data;
$message = $xpath->query('//az:Error/az:Message/text()')->item(0)->data;
switch($code) {
case 'AWS.ECommerceService.NoExactMatches':
break;
default:
/**
* @see Zend_Service_Exception
*/
require_once 'Zend/Service/Exception.php';
throw new Zend_Service_Exception("$message ($code)");
}
}
}
}
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