We restarted (or I can say started…) the development work from this Monday and things are in good progress. In the meantime, I would like to share what we’ve experienced during development and I hope this can help you if you are thinking to develop your own client on Windows Phone 7 or Silverlight for Sina Weibo. So this first entry is about getting OAuth access token for Sina Weibo via Hammock. Hammock is a great lib for you to consume and wrap RESTful services and it supports OAuth and XAuth.

Step 1 register your app.
Sure, you need to apply/register an application on http://open.t.sina.com.cn/. You will then get your app key and secret (which is actually consumer key and secret).

Step 2 authentication.
OAuth is quite simple and straightforward. In summary, you need to pass your consumer key and secret to get the request token, like this,

void OAuthTest()
{
    RestClient c = new RestClient()
    {
        Authority = "http://api.t.sina.com.cn/",
        HasElevatedPermissions = true,
        Credentials = new OAuthCredentials()
        {
            ConsumerKey = "your appkey",
            ConsumerSecret = "your appsecret",
            SignatureMethod = OAuthSignatureMethod.HmacSha1,
            ParameterHandling = 
OAuthParameterHandling.HttpAuthorizationHeader,
            Version = "1.0"
        }
    };

    RestRequest r = new RestRequest()
    {
        Path = "oauth/request_token",

    };

    c.BeginRequest(r, new RestCallback(Callback));

}

void Callback(RestRequest request, RestResponse response, 
object userState)
{
    Regex r = 
new Regex("oauth_token=([^&.]*)&oauth_token_secret=([^&.]*)");
    var match = r.Match(response.Content);
    token = match.Groups[1].Value;
    tokensecret = match.Groups[2].Value;
}

RestClient c = new RestClient()
{
    Authority = "http://api.t.sina.com.cn/",
};

RestRequest req = new RestRequest()
{
    Path = string.Format("oauth/authorize?{0}&oauth_callback=xml
&userId={1}&passwd={2}", response.Content, "user", "password")
};

c.BeginRequest(req, new RestCallback(Callback2));        

void Callback2(RestRequest request, RestResponse response,
 object userState)
{
    Regex r = new Regex("<oauth_token>(.*?)</oauth_token>
<oauth_verifier>(.*?)</oauth_verifier>");
    var match = r.Match(response.Content);
}

RestClient c = new RestClient()
{
    Authority = "http://api.t.sina.com.cn/",
    HasElevatedPermissions = true,
    Credentials = new OAuthCredentials()
    {
        ConsumerKey = "your appkey",
        ConsumerSecret = "your appsecret",
        Token = "request token",
        TokenSecret = "request tokensecret",
        Verifier = "your oauth verifier from last step",
        SignatureMethod = OAuthSignatureMethod.HmacSha1,
        ParameterHandling = OAuthParameterHandling.HttpAuthorizationHeader,
        Type = OAuthType.AccessToken,
        Version = "1.0"
    }
};

RestRequest r2 = new RestRequest()
{
    Path = "oauth/access_token",

};

c.BeginRequest(r2, new RestCallback(Callback3));

public void Callback3(RestRequest request, RestResponse response, 
object userState)
{
    // you will get format like this and that's your access
 token: oauth_token=token&oauth_token_secret=secret&user_id=id
    var s = response.Content;
}

        private void Test()
        {
            RestClient c = new RestClient()
            {
                Authority = "http://api.t.sina.com.cn/",
                HasElevatedPermissions = true,
                Credentials = new OAuthCredentials()
                {
                    ConsumerKey = "your appkey",
                    ConsumerSecret = "your appsecret",
                    Token = "your access token",
                    TokenSecret = "your access tokensecret",
                    SignatureMethod = OAuthSignatureMethod.HmacSha1,
                    ParameterHandling = OAuthParameterHandling.HttpAuthorizationHeader,
                    Type = OAuthType.ProtectedResource,
                    Version = "1.0"
                }
            };

            RestRequest r2 = new RestRequest()
            {
                Path = "statuses/update.xml"
            };

            r2.AddParameter("status", "hello world");
            r2.Method = WebMethod.Post;
            c.BeginRequest(r2, new RestCallback(Callback));

        }

        void Callback(RestRequest request, RestResponse response,
 object userState)
        {
            // check wheather post is successful
        }

references:
OAuth: http://oauth.net
Sina Weibo API: http://open.t.sina.com.cn/
Hammock: http://hammock.codeplex.com

So how about contact info? I tried to add my twitter link to the app, and it just works. From some internal discussion, I would think following information will be OK (not guaranteed…) since in basic, it just requires you to provide a contact approach for end user to contact/feedback to you.

• twitter link
• a webpage/website
• embedded contact form page
• email
• anything else can find you…

Hope this helps…

1. Small/Micro kernel.
2. Powerful UI.
3. Simple Application development.

And what I can see now is it really has an innovative UI and I like it. The kernel should be neat althought it definitely should be based on Win CE (guess). So what I really want to know is how to develop app based on this new UI. It should bring a tough switch… But let’s check it out on MIX10…