Twitterizer-远程服务器返回错误：（401）未授权

Question

我正在关注Ricky的Twitterizer example（对我的一些修改），但是当我尝试发送身份验证请求时收到“401 Unauthorized”异常：

{Twitterizer.TwitterizerException: The remote server returned an error: (401) Unauthorized. ---> System.Net.WebException: The remote server returned an error: (401) Unauthorized. 
    at System.Net.HttpWebRequest.GetResponse() 
    at Twitterizer.WebRequestBuilder.ExecuteRequest() 
    at Twitterizer.OAuthUtility.GetRequestToken(String consumerKey, String consumerSecret, String callbackAddress) 
    --- End of inner exception stack trace --- 
    at Twitterizer.OAuthUtility.GetRequestToken(String consumerKey, String consumerSecret, String callbackAddress) 
    at MyProject.Controllers.AccountController.Authenticate(String oauthToken, String oauthVerifier, String returnUrl) in C:\path\to\my\website\Controllers\AccountController.cs:line 78} 

我有握住我的消费者密钥和消费者秘密私有成员变量：

// I obtain my consumer key and the consumer secret from the web config 
private static readonly string _twitterConsumerKey = WebConfigurationManager.AppSettings["TwitterConsumerKey"]; 
private static readonly string _twitterConsumerSecret = WebConfigurationManager.AppSettings["TwitterConsumerSecret"]; 

而且我也有一个控制器来处理登录：

// GET: Account/Logon/ 
[HttpPost] 
public ActionResult LogOn(string returnUrl) 
{ 
    return Authenticate(string.Empty, string.Empty, HttpUtility.UrlEncode(Request.QueryString["ReturnUrl"])); 
} 

//private ActionResult 
private ActionResult Authenticate(string oauthToken, string oauthVerifier, string returnUrl) 
{ 
    if (string.IsNullOrEmpty(oauthToken) || string.IsNullOrEmpty(oauthVerifier)) 
    { 
     UriBuilder builder = new UriBuilder(this.Request.Url); 
     builder.Query = string.Concat(
      builder.Query, 
      string.IsNullOrEmpty(builder.Query) ? string.Empty : "&", 
      "returnUrl=", 
      returnUrl); 

     try 
     { 
      string token = OAuthUtility.GetRequestToken(
       _twitterConsumerKey, 
       _twitterConsumerSecret, 
       builder.ToString()).Token; // <-- Throws the exception 

      return Redirect(OAuthUtility.BuildAuthorizationUri(token, true).ToString()); 
     } 
     catch (Exception e) 
     { 
      ViewBag.Error = e.ToString(); // 401 Unauthorized 
      return View(); 
     } 
    } 

    OAuthTokenResponse tokens = OAuthUtility.GetAccessToken(
     _twitterConsumerSecret, 
     _twitterConsumerSecret, 
     oauthToken, 
     oauthVerifier); 

    // Save the user details and set the authentication (cookie) 
    // ... 
    // ... 
    // ... 

    if (string.IsNullOrEmpty(returnUrl)) 
     return Redirect("/"); 
    else 
     return Redirect(returnUrl); 
} 

请注意，我删除了一些与该错误无关的代码。仅上面的代码就会导致例外。有一点要注意的是我的returnUrl是空的（尽管如果我也提供returnUrl也会发生同样的情况）;一切似乎都很好。 HttpWebRequest看起来像这样：

Address = {https://api.twitter.com/oauth/request_token?oauth_callback=http://localhost:24465/Account/LogOn?returnUrl=} 

有什么想法可能会导致此问题？

Answer 1

登录到dev.twitter.com并仔细检查您的应用程序是否是Web应用程序。为了成为一个Web应用程序，你必须在那里提供一个回调url，即使你要在运行时提供一个“真正的”回调。

仅供参考，您无法为注册的回调URL提供'localhost'，但您可以使用127.0.0.1。