Amazon Web 服务的 GetAuthToken 方法不起作用

Question

我正在尝试访问亚马逊网络服务以获得 GetAuthToken() 方法。但每次我得到签名不正确的错误。每次我收到这个错误。找不到确切原因

谁能分享这方面的工作示例或看看我在做什么？

我的代码：

 private void GetToken()
{
    string secretKey = "my secret key";       
    string serviceUrl = "https://mws.amazonservices.com/Sellers/2011-07-01";
    string CHARACTER_ENCODING = "UTF-8";
    string ALGORITHM = "HmacSHA256";

    // Create set of parameters needed and store in a map
    Dictionary<string, string> parameters = new Dictionary<string,string>();

    // Add required parameters. Change these as needed.
    parameters.Add("AWSAccessKeyId", "my access id");
    parameters.Add("Action","GetAuthToken");
    parameters.Add("MWSAuthToken", "");
    parameters.Add("SellerId","my seller id");
    parameters.Add("SignatureMethod", ALGORITHM);
    parameters.Add("SignatureVersion",("2");

    parameters.Add("Timestamp", "2015-07-06T16:03:00Z");
    parameters.Add("Version", "2011-07-01");

    // Format the parameters (without the signature parameter)
    string formattedParameters = calculateStringToSignV2(parameters, serviceUrl);

    string signature = signNew(formattedParameters, secretKey);

    // Add signature to the parameters 
    parameters.Add("Signature", signature);

    formattedParameters = calculateStringToSignV2(parameters, serviceUrl);



    string querystring = formattedParameters.Substring(formattedParameters.IndexOf("AWSAccessKeyId"));


      // Setup the HTTP request.
    HttpWebRequest objWebRequest = (HttpWebRequest)WebRequest.Create(serviceUrl + "?" + querystring);
    objWebRequest.Method = "POST";
    objWebRequest.AllowAutoRedirect = true;
    objWebRequest.ContentLength = querystring.Length;

    // Post to the login form.
    StreamWriter swRequestWriter = new StreamWriter(objWebRequest.GetRequestStream());
    swRequestWriter.Write(querystring);
    swRequestWriter.Close();
    HttpWebResponse objWebResponse = null;
    try
    {
        // Get the response.
        objWebResponse =
            (HttpWebResponse)objWebRequest.GetResponse();
    }
    catch(WebException e)
    {

    }
    // Read the response
    StreamReader srResponseReader = new
        StreamReader(objWebResponse.GetResponseStream());
    string strResponseData = srResponseReader.ReadToEnd();
    srResponseReader.Close();

    responseTxt.Text =strResponseData;



private static string calculateStringToSignV2(Dictionary<string, string> _Parameters, string serviceUrl)
{


    Uri endpoint = new Uri(serviceUrl.ToLower());
    StringBuilder data = new StringBuilder();
    data.Append("POST\n");
    data.Append(endpoint.Host);
    data.Append("\n/");
    data.Append("\n");

    SortedDictionary<string, string> sorted = new SortedDictionary<string, string>();
    foreach (KeyValuePair<String, String> pair in _Parameters)
    {
        sorted.Add(pair.Key, pair.Value);
    }


    if (sorted.Count > 0)
    {
        //data.Append("?");
        bool first = true;
        foreach (KeyValuePair<String, String> pair in sorted)
        {
            if (!first)
            {
                data.Append("&");
            }
            else
            {
                first = false;
            }
            data.Append((pair.Key));
            data.Append("=");
            data.Append((pair.Value));
        }
    }

    return data.ToString();
}

}

  private static String signNew(string parameters, string secretKey)
     {           

         string data = parameters;

         HMACSHA256 hmac = new    HMACSHA256(Encoding.UTF8.GetBytes(secretKey));
         hmac.Initialize();

         byte[] bytes = Encoding.UTF8.GetBytes(data);
         byte[] signature = hmac.ComputeHash(bytes);

         string signatureBase64 = Convert.ToBase64String(signature);

         return signatureBase64;           
  }

  private static String urlEncodeNew(String rawValue) {

    string value = (rawValue == null) ? "" : rawValue;
    string encoded = null;

    try {
        encoded = System.Web.HttpUtility.UrlEncode(rawValue, Encoding.UTF8).Replace("+", "%20")
            .Replace("*", "%2A")
            .Replace("%7E", "~");


    } catch (Exception e) {

    }

    return encoded;
}

Answer 1

可能有很多原因：

您的代码使用了错误的 url
参数错误"MWSAuthToken"
检查您传递的参数值是否正确
看看你是怎么计算签名的。

亚马逊公开了自己的库：Download it here

下载库后，在您的解决方案中添加 "MWSClientCsRuntime-1.0.dll" 的引用。

有两种方法可以使用：

MWSClientCsRuntime.MwsUtil.UrlEncode（这是为了编码字符）
MWSClientCsRuntime.MwsUtil.Sign（签名用）

完成调整代码：

 private void GetToken()
 {
     string secretKey = "your secret key";
     string serviceUrl = "https://mws.amazonservices.com/Sellers/2011-07-01";
     string CHARACTER_ENCODING = "UTF-8";
     string ALGORITHM = "HmacSHA256";

     Dictionary<string, string> parameters = new Dictionary<string, string>();

    parameters.Add("AWSAccessKeyId", MWSClientCsRuntime.MwsUtil.UrlEncode("your access key", true));
    parameters.Add("Action", MWSClientCsRuntime.MwsUtil.UrlEncode("GetAuthToken", true));
    parameters.Add("SellerId", MWSClientCsRuntime.MwsUtil.UrlEncode("your seller id", true));
    parameters.Add("SignatureMethod", MWSClientCsRuntime.MwsUtil.UrlEncode(ALGORITHM, true));
    parameters.Add("SignatureVersion", MWSClientCsRuntime.MwsUtil.UrlEncode("2", true));
    parameters.Add("Timestamp", MWSClientCsRuntime.MwsUtil.UrlEncode(("2015-07-06T17:13:00Z", true)); 
    parameters.Add("Version", MWSClientCsRuntime.MwsUtil.UrlEncode("2011-07-01", true));


    string formattedParameters = calculateStringToSignV2(parameters, serviceUrl);

    Uri u = new Uri("https://mws.amazonservices.com");
    string signature = MWSClientCsRuntime.MwsUtil.Sign(formattedParameters, secretKey, ALGORITHM);

    // Add signature to the parameters
    parameters.Add("Signature", MWSClientCsRuntime.MwsUtil.UrlEncode(signature, true));
    formattedParameters = calculateStringToSignV2(parameters, serviceUrl);

    string data = formattedParameters.Substring(formattedParameters.IndexOf("AWSAccessKeyId"));

    HttpWebRequest objWebRequest = (HttpWebRequest)WebRequest.Create(serviceUrl + "?" + data);
    objWebRequest.Method = "POST";
    objWebRequest.AllowAutoRedirect = true;
    objWebRequest.ContentLength = data.Length;

    StreamWriter swRequestWriter = new StreamWriter(objWebRequest.GetRequestStream());
    swRequestWriter.Write(data);
    swRequestWriter.Close();
    HttpWebResponse objWebResponse = null;
    try
    {
        // Get the response.
        objWebResponse =
            (HttpWebResponse)objWebRequest.GetResponse();

        StreamReader srResponseReader = new StreamReader(objWebResponse.GetResponseStream());
        string strResponseData = srResponseReader.ReadToEnd();
        srResponseReader.Close();

        responseTxt.Text = strResponseData;
    }
    catch (WebException e)
    {
        responseTxt.Text = e.Message;
    }


  private static string calculateStringToSignV2(Dictionary<string, string> _Parameters, string serviceUrl)
{

    Uri endpoint = new Uri(serviceUrl.ToLower());
    StringBuilder data = new StringBuilder();
    data.Append("POST\n");
    data.Append(endpoint.Host);
    data.Append("\n");
    data.Append("/Sellers/2011-07-01");
    data.Append("\n");

    if (_Parameters.Count > 0)
    {
        bool first = true;
        foreach (KeyValuePair<String, String> pair in _Parameters)
        {
            if (!first)
            {
                data.Append("&");
            }
            else
            {
                first = false;
            }
            data.Append((pair.Key));
            data.Append("=");
            data.Append((pair.Value));
        }
    }

    return data.ToString();
   }
 }

Answer 2

重要提示：您必须在 2015 年 3 月 31 日之前调用此操作 (GetAuthToken) 为您现有的卖家获取授权令牌。该日期之后，此操作将不再可用。

//来自https://images-na.ssl-images-amazon.com/images/G/01/mwsportal/doc/en_US/bde/MWSAuthToken.pdf //

Amazon Web 服务的 GetAuthToken 方法不起作用

GetAuthToken method of Amazon web service not working

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