Magento OAuth客户登录

为了客户移动登录，我正试图通过Magento的OAuth系统进行身份验证-php有很多例子，但我只能找到C#的部分。如果可能的话，我希望避免使用浏览器，并以编程方式执行登录。

REST API的身份验证和使用包含在PCL库中-与.NET 4.5、Xamarin.IOS、Xamaring.Android和Windows Phone Silverlight兼容。因此，我不得不使用诸如RestSharp.portable.之类的可移植库

迄今为止的进展：

到目前为止，我已经能够检索到未经授权的代币；oauth_token和oauth_taken_secret，但我无法完成接下来的两个步骤/oauth/authenticate和/oauth/token。Magento官方指南(http://www.magentocommerce.com/api/rest/authentication/oauth_authentication.html)建议下一步操作是访问/oauth/authorize，允许用户登录，然后从回调url中恢复两个url参数。然而，当我在浏览器中尝试此操作时，它只是将我重定向到/index.php/customer/account/login/-我希望它重定向到我的回调url（localhost），这样我就可以通过使用位置cookie检测重定向，然后以这种方式检索令牌。

有人能就如何完成授权提出建议吗？

身份验证过程：

var magento = new MagentoHelper();
await magento.OAuthInitiate();
await magento.OAuthAuthorize();
await magento.OAuthToken();

Magento操作：

public class MagentoHelper
{
    public readonly string ServiceUrl = ""; // e.g. http://127.0.0.1
    public readonly string MagentoService = ""; // e.g. /magento
    public readonly string ConsumerKey = "";
    public readonly string ConsumerSecret = "";
    public readonly string CustomerUsername = "";
    public readonly string CustomerPassword = "";
    private RestClient _client;
    private MagentoTools _magentoTools;
    private string _oauthToken;
    private string _oauthTokenSecret;
    public MagentoHelper()
    {
        _client = new RestClient(ServiceUrl);
        _magentoTools = new MagentoTools();
    }
    /// <summary>
    /// Retrieve unauthorized tokens from OAuth service
    /// </summary>
    public async Task OAuthInitiate()
    {
        var request = new RestRequest(MagentoService + "/oauth/initiate", HttpMethod.Post);
        string nonce = _magentoTools.GetNonce();
        string timestamp = _magentoTools.GetTimestamp();
        var parameters = new Dictionary<string, string>();
        parameters.Add("oauth_callback", "http://localhost:8888");
        parameters.Add("oauth_consumer_key", ConsumerKey);
        parameters.Add("oauth_nonce", nonce);
        parameters.Add("oauth_signature_method", "HMAC-SHA1");
        parameters.Add("oauth_timestamp", timestamp);
        parameters.Add("oauth_version", "1.0");
        var postUrl = new Uri(ServiceUrl + MagentoService + "/oauth/initiate");
        var signature = OAuth1.GetSignature("POST", postUrl, parameters, ConsumerSecret, "").ToString();
        parameters.Add("oauth_signature", OAuth1.EncodeString(signature));
        string authHeader = _magentoTools.GetAuthorizationHeader(parameters.ToList());
        request.Parameters.Add(new Parameter() { Type = ParameterType.HttpHeader, Name = "Authorization", Value = authHeader });
        try
        {
            var response = await _client.Execute(request);
            string data = Encoding.UTF8.GetString(response.RawBytes, 0, response.RawBytes.Length);
            var queryParameters = _magentoTools.FillFromString(data, true);
            _oauthToken = queryParameters["oauth_token"];
            _oauthTokenSecret = queryParameters["oauth_token_secret"];
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }
    /// <summary>
    /// Navigate to OAuth login page, extract form post URL and submit user credentials.
    /// Upon redirection, store the redirection url in preparation for extraction of the new tokens.
    /// </summary>
    public async Task OAuthAuthorize()
    {
        var webClient = new HttpClient();
        var loginUrl = new Uri(_client.BaseUrl.ToString() + MagentoService.Trim('/') + "/oauth/authorize" + "?oauth_token=" + _oauthToken).ToString();
        // Get the login page and find the form post action url and the formkey
        var loginPage = new HtmlDocument();
        using (var responseStream = await webClient.GetStreamAsync(loginUrl))
        {
            loginPage.Load(responseStream);
        }
        var loginForm = loginPage.GetElementbyId("login-form");
        var postUrl = loginForm.GetAttributeValue("action", string.Empty);
        // Post the user credentials to the post action url
        var postRequest = (HttpWebRequest)WebRequest.Create(postUrl);
        postRequest.Method = "POST";
        postRequest.ContentType = "application/x-www-form-urlencoded";
        postRequest.CookieContainer = new CookieContainer();
        var postData = String.Format("login%5busername%5d={0}&login%5bpassword%5d={1}&oauth_token={2}", CustomerUsername, CustomerPassword, _oauthToken);
        byte[] postDataBytes = Encoding.UTF8.GetBytes(postData);
        using (var requestStream = await postRequest.GetRequestStreamAsync())
        {
            requestStream.Write(postDataBytes, 0, postDataBytes.Length);
        }
        using (var response = await postRequest.GetResponseAsync())
        {
            if (response.Headers["location"] == null) throw new Exception("location is null");
        }
    }
    public async Task OAuthToken()
    {
        await Task.Yield();
    }
}