当我尝试使用DotNetOpenAuth访问其API时，从LinkedIn获得HTTP 400错误

我正在尝试使用DotNetOpenAuth编写一个基本程序来代表用户搜索人员。只是一个简单的程序，试图了解OAuth。现在我正在尝试授权，但是当我尝试这样做时，我从linkedIn得到一个HTTP 400状态码。

我试过使用DesktopConsumers和WebConsumers，两者都以同样的方式失败。我知道引起异常的特定函数是对第34行RequestUserAuthorization的调用，我已经尝试使用空字典和空值作为输入，但没有发生任何事情。

我使用两个类的程序一个testlinkedin.com cs类包含main和LinkedInTokenManager.cs类，这是IConsumerTokenManager的一个非常简单的实现。

下面是TestLinkedIn.cs的代码。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using DotNetOpenAuth.Messaging;
using DotNetOpenAuth.OAuth.Messages;
using DotNetOpenAuth.OAuth;
using DotNetOpenAuth.OAuth.ChannelElements;
namespace Project
{
    class TestLinkedIn
    {
        #region Variables
        private static string APIKey = "APIKey";
        private static string APISecret = "APISecret";
        private static string OAuthToken = "OAuthToken";
        private static string OAuthSecret = "OAuthSecret";
        #endregion
        static void Main(string[] args)
        {
            ServiceProviderDescription linkedIn = LinkedInDescription();
            LinkedInTokenManager tokenManager = new LinkedInTokenManager(OAuthToken, OAuthSecret);//APIKey,APISecret);//
            DesktopConsumer web = new DesktopConsumer(linkedIn,tokenManager); 
            string requestToken = "";
            Uri authUrl = new Uri("https://steve.com");// ("https://api.linkedin.com/uas/oauth/requestToken");//"http" + "://" + "api.linkedin.com" + "/Home/OAuthCallBack");
            Dictionary<string, string> empty = new Dictionary<string, string>();
            try{
                //UserAuthorizationRequest request = web.PrepareRequestUserAuthorization(null, null, null, out requestToken);//null, null, null);//authUrl, null, null);
                //UserAuthorizationRequest request =web.Channel.Request(new AccessProtectedResourceRequest());
                //web.Channel.Send(request);
                authUrl = web.RequestUserAuthorization(empty, empty, out requestToken);
                Console.WriteLine(requestToken);
                Console.ReadKey();
            }
            catch (ProtocolException e)
            {
                Console.Write(e.StackTrace);
                Console.WriteLine("Error detected");
                //Console.ReadKey();
            }
        }
        private static ServiceProviderDescription LinkedInDescription(){
            ServiceProviderDescription linkedIn = new ServiceProviderDescription();
            linkedIn.AccessTokenEndpoint = new DotNetOpenAuth.Messaging.MessageReceivingEndpoint
                ("https://api.linkedin.com/uas/oauth/accessToken", DotNetOpenAuth.Messaging.HttpDeliveryMethods.PostRequest);
            linkedIn.RequestTokenEndpoint = new DotNetOpenAuth.Messaging.MessageReceivingEndpoint
                ("https://api.linkedin.com/uas/oauth/requestToken",DotNetOpenAuth.Messaging.HttpDeliveryMethods.PostRequest);
            linkedIn.UserAuthorizationEndpoint = new MessageReceivingEndpoint("https://www.linkedin.com/uas/oauth/authorize",
                HttpDeliveryMethods.PostRequest);
            linkedIn.TamperProtectionElements =new ITamperProtectionChannelBindingElement[]
                {new HmacSha1SigningBindingElement()};
            linkedIn.ProtocolVersion=ProtocolVersion.V10a;
            return linkedIn;
        }
    }
}

这是LinkedInTokenManager

的代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using DotNetOpenAuth.OAuth.ChannelElements;
using DotNetOpenAuth.OAuth.Messages;
namespace Project
{
    class LinkedInTokenManager : IConsumerTokenManager
    {
        private Dictionary<string, string> tokens = new Dictionary<string, string>();
        private string consumerKey;
        private string consumerSecret;
    public LinkedInTokenManager(string Key, string Secret)
    {
        consumerKey = Key;
        consumerSecret = Secret;
    }
    public string ConsumerKey
    {
        get { return consumerKey; }
    }
    public string ConsumerSecret
    {
        get { return consumerSecret; }
    }
    public void ExpireRequestTokenAndStoreNewAccessToken(string consumerKey, string requestToken, string accessToken, string accessTokenSecret)
    {
        tokens.Remove(requestToken);
        tokens[accessToken] = accessTokenSecret;
    }
    public string GetTokenSecret(string token)
    {
        try
        {
            return tokens[token];
        }
        catch (KeyNotFoundException k)
        {
            return null;
        }
    }
    public TokenType GetTokenType(string token)
    {
        throw new NotImplementedException();
    }
    public void StoreNewRequestToken(UnauthorizedTokenRequest request, ITokenSecretContainingMessage response)
    {
        tokens[response.Token] = response.TokenSecret;
    }
  }
}

这是我要发到服务器上的东西。

oauth_callback=oob&oauth_consumer_key=6415f7ed-d618-422a-b090-73f3056653d7&oauth_nonce=nGQjFcC1&oauth_signature_method=HMAC-SHA1&oauth_signature=XmUBfGVGDoBZDOC%2Bjp4Fj68MPGI%3D&oauth_version=1.0&oauth_timestamp=1357136418

，这里是错误消息的堆栈跟踪。

at DotNetOpenAuth.Messaging.StandardWebRequestHandler.GetResponse(HttpWebRequest request, DirectWebRequestOptions options)
   at DotNetOpenAuth.Messaging.StandardWebRequestHandler.GetResponse(HttpWebRequest request)
       at DotNetOpenAuth.Messaging.Channel.GetDirectResponse(HttpWebRequest webRequest)
       at DotNetOpenAuth.Messaging.Channel.RequestCore(IDirectedProtocolMessage request)
       at DotNetOpenAuth.Messaging.Channel.Request(IDirectedProtocolMessage requestMessage)
       at DotNetOpenAuth.Messaging.Channel.Request[TResponse](IDirectedProtocolMessage requestMessage)
       at DotNetOpenAuth.OAuth.ConsumerBase.PrepareRequestUserAuthorization(Uri callback, IDictionary`2 requestParameters, IDictionary`2 redirectParameters, String& requestToken)
       at DotNetOpenAuth.OAuth.DesktopConsumer.RequestUserAuthorization(IDictionary`2 requestParameters, IDictionary`2 redirectParameters, String& requestToken)
       at APIphanySalesProject.TestLinkedIn.Main(String[] args) in c:'Users'Admin'Documents'Visual Studio 2012'Projects'Project'Project'TestLinkedIn.cs:line 34

任何想法吗?