亚马逊 MWS ListOrders 从 Scratchpad 请求

我正在尝试通过 MWS Scratchpad 获取订单列表。 在便签本中一切正常。

HTTP POST 是

POST /Orders/2013-09-01?AWSAccessKeyId=$CHIAVE_ACCESSO
&Action=ListOrders
&SellerId=$SELLER_ID
&SignatureVersion=2
&Timestamp=2016-11-29T18%3A58%3A52Z
&Version=2013-09-01
&Signature=$SIGNATURE
&SignatureMethod=HmacSHA256
&CreatedAfter=2016-10-31T23%3A00%3A00Z
&MarketplaceId.Id.1=APJ6JRA9NG5V4 HTTP/1.1
Host: mws.amazonservices.it
x-amazon-user-agent: AmazonJavascriptScratchpad/1.0 (Language=Javascript)
Content-Type: text/xml

要签名的字符串（在第二个框中）是

POST
mws.amazonservices.it
/Orders/2013-09-01
AWSAccessKeyId=$CHIAVE_ACCESSO&Action=ListOrders&CreatedAfter=2016-10-31T23%3A00%3A00Z&MarketplaceId.Id.1=APJ6JRA9NG5V4&SellerId=$SELLER_ID&Signat    ureMethod=HmacSHA256&SignatureVersion=2&Timestamp=2016-11-29T18%3A58%3A52Z&Version=2013-09-01

显示暂存器的结果是正确的。

我想做的是通过 PHP 发出请求并详细说明结果。

但是如果我首先尝试将请求放在我的浏览器上，例如

https://mws.amazonservices.it/Orders/2013-09-01?AWSAccessKeyId= https://mws.amazonservices.it/Orders/2013-09-01?AWSAccessKeyId=$CHIAVE_ACCESSO&Action=ListOrders&MarketplaceId=APJ6JRA9NG5V4&SellerId=$SELLER_ID&SignatureMethod=HmacSHA256&SignatureVersion=2&时间戳=2016-11-29T19%3A13%3A01.000Z&版本=2013-09-01&Signature=Q9Xnr9Jhtkze LUAsCFKPln8SS34FkCQRmELE2WiIhPo%3D&CreatedAfter=2016-10-31T23%3A00%3A00Z

the error is

我用来创建签名的方法是在 stackoverflow 上找到的，如下所示：

$sign  = 'GET' . "\n";
$sign .= 'mws.amazonservices.it' . "\n";
$sign .= '/Orders/2013-09-01' . "\n";
$sign .= $arr;

$signature = hash_hmac("sha256", $sign, $CHIAVE_SEGRETA, true);
$signature = urlencode(base64_encode($signature));

我做错了什么？

参数的顺序很重要。

下面是一些示例代码，应该可以为您提供一个良好的起点。您只需要稍微修改它以适合您的系统。

class AmazonMWS
{
    private $secretKey = '';

    private $parameters = array();

    /**
     * Constructor for the AmazonMWS class.
     * Initializes constants.
     */
    public function __construct() 
    {
        $this->secretKey = Constant::get('SECRET_KEY');

        $this->parameters['AWSAccessKeyId']     = Constant::get('AWSAccessKeyId');
        $this->parameters['MarketplaceId.Id.1'] = Constant::get('MarketplaceId.Id.1');
        $this->parameters['SellerId']           = Constant::get('SellerId');
        $this->parameters['SignatureMethod']    = Constant::get('SignatureMethod');
        $this->parameters['SignatureVersion']   = Constant::get('SignatureVersion');
    }

    public function setListOrders()
    {
        $this->parameters['Action'] = 'ListOrders';
        $this->parameters['Version'] = '2013-09-01';
        $this->parameters['Timestamp'] = $this->getTimestamp();

        // this part should change and depend on the method/parameter.. for now just for testing

        $this->parameters['CreatedAfter'] = '2015-11-01';
    }

    public function listOrders()
    {
        $request = "https://mws.amazonservices.com/Orders/2013-09-01?";
        $request .= $this->getParameterString($this->parameters) . "&Signature=" . $this->calculateSignature($this->calculateStringToSign($this->parameters));

        echo $request;

        return Curl::fetchSSL($request);
    }

    /**
     * Calculates String to sign.
     * 
     * @param array $parameters request parameters
     * @return String to sign
     */
    protected function calculateStringToSign(array $parameters)
    {
        $stringToSign  = 'GET' . "\n";
        $stringToSign .= 'mws.amazonservices.com' . "\n";
        $stringToSign .= '/Orders/2013-09-01' . "\n";
        $stringToSign .= $this->getParameterString($parameters);

        return $stringToSign;
    }

    /**
     * Gets the query parameters as a String sorted in natural-byte order.
     * 
     * @param array $parameters request parameters
     * @return String of parameters
     */
    protected function getParameterString(array $parameters)
    {
        $url = array();
        foreach ($parameters as $key => $val) {
            $key = $this->urlEncode($key);
            $val = $this->urlEncode($val);
            $url[] = "{$key}={$val}";
        }
        sort($url);

        $parameterString = implode('&', $url);

        return $parameterString;
    }

    /**
     * Computes RFC 2104-compliant HMAC signature.
     *
     * @param String to sign
     */
    protected function calculateSignature($stringToSign)
    {
        $signature = hash_hmac("sha256", $stringToSign, $this->secretKey, true);
        return urlencode(base64_encode($signature));
    }

    /**
     * URL encodes a string.
     */
    protected function urlEncode($string)
    {
        return str_replace("%7E", "~", rawurlencode($string));
    }

    /**
     * Gets the current date as ISO 8601 timestamp
     */
    protected function getTimestamp()
    {
        return gmdate("Y-m-d\TH:i:s.\\0\\0\\0\\Z", time());
    }
}