微软翻译无法连续返回 400

Question

我在 C# 控制台应用程序中实现了 MS Translator API。 我的订阅级别是付费帐户，而不是免费级别。 每次我开始调用它时，前 1-5 个翻译都可以正常工作。 之后，我得到了源源不断的 400（错误请求）异常。

这是我收到的文本回复：

响应文本：TranslateApiException 方法：Translate() 消息： 找不到有效的 Azure 市场翻译器订阅 与请求相关的 credentials.message id=3832.V2_Rest.Translate.117038D9

我错过了什么？我肯定在代码中包含了应用 ID 和密钥？

我是否还打算提供一些额外的凭据？

这是我的翻译类： 有什么想法吗？

// --------------------------------------------------------------------
public class Translator
{
    private string AccessToken;
    private DateTime TokenExpirationDate;

    // ----------------------------------------------------------------
    public Translator()
    {
        AccessToken = "";
        TokenExpirationDate = new DateTime(2000, 1, 1);
    }

    // --------------------------------------------------------------
    public void GetAccessToken()
    {
        if (AccessToken != "" && DateTime.Now < TokenExpirationDate)
        {
            Console.WriteLine("Translator: usng existing token");
            return;
        }

        AccessToken = "";
        string clientID = "<-removed->";
        string clientSecret = "<-also-removed->";
        String strTranslatorAccessURI = "https://datamarket.accesscontrol.windows.net/v2/OAuth2-13";
        String strRequestDetails =
              string.Format("grant_type=client_credentials&client_id={0}&client_secret={1} &scope=http://api.microsofttranslator.com", HttpUtility.UrlEncode(clientID),
              HttpUtility.UrlEncode(clientSecret));

        System.Net.WebRequest webRequest = System.Net.WebRequest.Create(strTranslatorAccessURI);
        webRequest.ContentType = "application/x-www-form-urlencoded";
        webRequest.Method = "POST";
        byte[] bytes = System.Text.Encoding.ASCII.GetBytes(strRequestDetails);
        webRequest.ContentLength = bytes.Length;
        using (System.IO.Stream outputStream = webRequest.GetRequestStream())
        {
            outputStream.Write(bytes, 0, bytes.Length);
        }

        WebResponse webResponse = null;
        try
        {
            webResponse = webRequest.GetResponse();
        }
        catch (Exception ex)
        {
            AccessToken = "";
            Console.WriteLine("Exception: " + ex.Message);
        }
        if (webResponse != null)
        {
            System.Runtime.Serialization.Json.DataContractJsonSerializer serializer = new System.Runtime.Serialization.Json.DataContractJsonSerializer(typeof(AdmAccessToken));
            AdmAccessToken token = (AdmAccessToken)serializer.ReadObject(webResponse.GetResponseStream());
            AccessToken = token.access_token;
            TokenExpirationDate = DateTime.Now.AddSeconds(Convert.ToDouble(token.expires_in));

            if (AccessToken.Length > 0) Console.WriteLine("Translator: got an access token.");
        }
    }

    // -------------------------------------------------------------------
    public string Translate(string textToTranslate, string destLanguageCode)
    {
        Console.WriteLine("Translator(" + destLanguageCode + "):" + textToTranslate);

        string uri = "http://api.microsofttranslator.com/v2/Http.svc/Translate?text=" + System.Web.HttpUtility.UrlEncode(textToTranslate) + "&from=en&to=" + destLanguageCode;
        System.Net.WebRequest translationWebRequest = System.Net.WebRequest.Create(uri);
        translationWebRequest.Headers.Add("Authorization", "Bearer " + AccessToken);
        System.Net.WebResponse response = null;

        try
        {
            response = translationWebRequest.GetResponse();
        }
        catch (Exception ex)
        {
            Console.WriteLine("Translator: Fail: " + ex.Message);
            Console.WriteLine("Exception: " + ex.Message);
        }
        if (response != null)
        {
            System.IO.Stream stream = response.GetResponseStream();
            System.Text.Encoding encode = System.Text.Encoding.GetEncoding("utf-8");

            System.IO.StreamReader translatedStream = new System.IO.StreamReader(stream, encode);
            System.Xml.XmlDocument xTranslation = new System.Xml.XmlDocument();
            xTranslation.LoadXml(translatedStream.ReadToEnd());

            Console.WriteLine("Translator(" + destLanguageCode + "):" + xTranslation.InnerText);
            return xTranslation.InnerText;
        }

        return "";
    }
}

// ------------------------------------------------------------------------
public class AdmAccessToken
{
    public string access_token { get; set; }
    public string token_type { get; set; }
    public string expires_in { get; set; }
    public string scope { get; set; }
}

}

Answer 1

查看响应的内容。它将以人类可读的形式包含错误的原因。 您可能没有与您的请求凭据关联的订阅。要解决这个问题：

• 访问 https://datamarket.azure.com/account/datasets 并确保您订阅了“Microsoft Translator - 文本翻译”。
• 访问 https://datamarket.azure.com/developer/applications 并定义客户端 ID 和密码。
• 在您的应用程序中使用该客户端 ID 和密码。