有用DotNetOpenAuth做GoogleBuzz接口的吗？

Question

我在用DotNetOpenAuth获取得GoogleAccessToken之后，在向google Buzz post数据时，总得到500错误或401错误，WebRequest request = consumer.PrepareAuthorizedRequest(new MessageReceivingEndpoint(PostUrl, HttpDeliveryMethods.AuthorizationHeaderRequest | HttpDeliveryMethods.PostRequest), State2.GoogleAccessToken);
        request.ContentType = "application/atom+xml";
        request.Method = "post";
        request.ContentLength = ms.Length;        
        ms.Seek(0, SeekOrigin.Begin);        using (Stream requestStream = request.GetRequestStream())
        {
            ms.CopyTo(requestStream);
        }
        request.GetResponse();//这里500错误
究竟要怎么写才对？这个问题搞了快一周了，都没解决。去DotNetOpenAuth论坛问也是没有任何回音，急死了。谁能指点方向？

Answer 1

还是贴出全部代码吧：
通过DotNetOpenAuth获取得google buzzGoogleAccessTokenif (authResponse != null)
        {            
            switch (authResponse.Status)
            {
                case AuthenticationStatus.Authenticated:
                    FetchResponse fetch = authResponse.GetExtension<FetchResponse>();
                    AuthorizedTokenResponse accessToken = GoogleLogin.GoogleWebConsumer.ProcessUserAuthorization(authResponse);
                    if (accessToken != null)
                    {
                        State2.GoogleAccessToken = accessToken.AccessToken;
                        string userEmail = null;
                        if (fetch != null)
                        {
                            userEmail = fetch.GetAttributeValue(WellKnownAttributes.Contact.Email);
                        }
                        PostBuzzEntry(GoogleLogin.GoogleWebConsumer, State2.GoogleAccessToken, "https://www.googleapis.com/buzz/v1/activities/@me/@self?key=AIzaSyBsVVpEHL7ov6gBB7WfnRASlfzPSKQUIU0", "testtesttest");
                        Response.Write(State2.GoogleAccessToken);
                    }                    
                    break;
//向google post 数据,总得到500错误private void PostBuzzEntry(ConsumerBase consumer, string accessToken, string PostUrl, string body)
    {        const string Atom = "http://www.w3.org/2005/Atom";
        XNamespace aw = "http://www.w3.org/2005/Atom";
        XNamespace activity = "http://activitystrea.ms/spec/1.0";
        XElement entry = new XElement(aw + "entry",
        new XAttribute("xmlns", "http://www.w3.org/2005/Atom"),
        new XAttribute(XNamespace.Xmlns + "activity", "http://activitystrea.ms/spec/1.0"),
        new XElement(activity + "object",
        new XElement(activity + "object-type", "http://activitystrea.ms/schema/1.0/note"),
        new XElement(XName.Get("content", Atom), new XAttribute("type", "html"), Server.UrlEncode("dfsfds"))));        MemoryStream ms = new MemoryStream();
        XmlWriterSettings xws = new XmlWriterSettings()
        {
            Encoding = Encoding.UTF8,
        };
        XmlWriter xw = XmlWriter.Create(ms, xws);
        entry.WriteTo(xw);
        //File.WriteAllText(Server.MapPath("post.xml"), entry.ToString());//这里已能按google要求构造出
<entry xmlns="http://www.w3.org/2005/Atom" xmlns:activity="http://activitystrea.ms/spec/1.0">
  <activity:object>
    <activity:object-type>http://activitystrea.ms/schema/1.0/note</activity:object-type>
    <content type="html">Hey, this is my first Buzz Post!</content>
  </activity:object>
</entry>这样的xml文件。http://code.google.com/intl/en/apis/buzz/v1/using_rest.html#create-activity
        xw.Flush();        
                WebRequest request = consumer.PrepareAuthorizedRequest(new MessageReceivingEndpoint(PostUrl, HttpDeliveryMethods.AuthorizationHeaderRequest | HttpDeliveryMethods.PostRequest), State2.GoogleAccessToken);
        request.ContentType = "application/atom+xml";
        request.Method = "post";
        request.ContentLength = ms.Length;        
        ms.Seek(0, SeekOrigin.Begin);        using (Stream requestStream = request.GetRequestStream())
        {
            ms.CopyTo(requestStream);
        }
        request.GetResponse();
    }

Answer 2

还真看不出什么问题。估计是XML的问题