Question

我正在使用以下代码向我的应用发送推送原始通知。代码取自official documentation。

中给出的示例

public string PostToWns(string secret, string sid, string uri, string xml, string notificationType, string contentType)
{
    try
    {
        var accessToken = GetAccessToken(secret, sid);

        byte[] contentInBytes = Encoding.UTF8.GetBytes(xml);

        HttpWebRequest request = HttpWebRequest.Create(uri) as HttpWebRequest;
        request.Method = "POST";
        request.Headers.Add("X-WNS-Type", notificationType);
        request.ContentType = contentType;
        request.Headers.Add("Authorization", String.Format("Bearer {0}", accessToken.AccessToken));

        using (Stream requestStream = request.GetRequestStream())
            requestStream.Write(contentInBytes, 0, contentInBytes.Length);

        using (HttpWebResponse webResponse = (HttpWebResponse)request.GetResponse())
        //                              ^^^^^ This throws an exception ^^^^^
            return webResponse.StatusCode.ToString();
    }

    catch (WebException webException)
    {
        HttpStatusCode status = ((HttpWebResponse)webException.Response).StatusCode;

        if (status == HttpStatusCode.Unauthorized)
        {
            GetAccessToken(secret, sid);
            return PostToWns(uri, xml, secret, sid, notificationType, contentType);
        }
        else if (status == HttpStatusCode.Gone || status == HttpStatusCode.NotFound)
        {
            return "";
        }
        else if (status == HttpStatusCode.NotAcceptable)
        {
            return "";
        }
        else
        {
            string[] debugOutput = {
                                status.ToString(),
                                webException.Response.Headers["X-WNS-Debug-Trace"],
                                webException.Response.Headers["X-WNS-Error-Description"],
                                webException.Response.Headers["X-WNS-Msg-ID"],
                                webException.Response.Headers["X-WNS-Status"]
                            };
            return string.Join(" | ", debugOutput);
        }
    }

    catch (Exception ex)
    {
        return "EXCEPTION: " + ex.Message;
    }
}

// Authorization
[DataContract]
public class OAuthToken
{
    [DataMember(Name = "access_token")]
    public string AccessToken { get; set; }
    [DataMember(Name = "token_type")]
    public string TokenType { get; set; }
}

private OAuthToken GetOAuthTokenFromJson(string jsonString)
{
    using (var ms = new MemoryStream(Encoding.Unicode.GetBytes(jsonString)))
    {
        var ser = new DataContractJsonSerializer(typeof(OAuthToken));
        var oAuthToken = (OAuthToken)ser.ReadObject(ms);
        return oAuthToken;
    }
}

protected OAuthToken GetAccessToken(string secret, string sid)
{
    var urlEncodedSecret = HttpUtility.UrlEncode(secret);
    var urlEncodedSid = HttpUtility.UrlEncode(sid);

    var body = String.Format("grant_type=client_credentials&client_id={0}&client_secret={1}&scope=notify.windows.com",
                                urlEncodedSid,
                                urlEncodedSecret);

    string response;
    using (var client = new WebClient())
    {
        client.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
        response = client.UploadString("https://login.live.com/accesstoken.srf", body);
    }
    return GetOAuthTokenFromJson(response);
}

服务器始终返回Unauthorized。但是，我可以毫无问题地获得令牌，并且使用的频道网址是official example中获得的。

整个代码立即执行，因此我怀疑令牌每次都会过期。

我尝试使用在线工具来检查推送通知是否有效，并且在那里发生了同样的Unauthorized错误。

我必须在某处注册WNS吗？我的应用程序已经在商店中，我有来自Live Services网站的ID和密码。我使用这些作为凭证来获取令牌，并且每次都获得令牌。我将此描述为相关问题的一部分：Proper WNS credentials。

有没有人有任何想法或解决方案？

Answer 1

我在另一个问题中找到了答案：Windows Notifications Service: 401 Invalid Token when trying to create a Toast notification in PHP。

client_id必须是完整的SID（包括协议前缀）和client_secret密码。

无法发送WNS推送通知

1 个答案: