Implementation of two legged OAuth 2.0 for WebApi RSS

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  kishore.efer...

  Member

  5 Points

  22 Posts

  Implementation of two legged OAuth 2.0 for WebApi

  Sep 08, 2012 07:18 AM|LINK

  I created a mvc4 webapi project using VS2012RC. I tried to implement two legged Oauth 2 in my project. I followed the tutorial "http://community.codesmithtools.com/CodeSmith_Community/b/tdupont/archive/2011/03/18/oauth-2-0-for-mvc-two-legged-implementation.aspx", even though it is for mvc i am implementing it for web api. But isn't working

  I created a html page for my client side. When the html page load it executes an ajax function which is intended to return "access Token".

  <script type="text/javascript">
          $(document).ready(function () {
          var url = 'http://localhost:9792/api/Login';
              $.get(url, function(data) {
  
              alert(data);
              }, "jsonp");
          });
          </script>

  The server side code is,

  [NoCache]
  public class LoginController : ApiController
  {
  
      public LoginModelOAuth GetLogin()
      {
  
          var response = OAuthServiceBase.Instance.RequestToken();
  
          LoginModelOAuth lmo = new LoginModelOAuth();
           lmo.RequestToken = response.AccessToken;
  
          return lmo;
      }
  }

  RequestToken() method look like,

  public override OAuthResponse RequestToken()
      {
          var token = Guid.NewGuid().ToString("N");
          var expire = DateTime.Now.AddMinutes(5);
          RequestTokens.Add(token, expire);
  
          return new OAuthResponse
          {
              Expires = (int)expire.Subtract(DateTime.Now).TotalSeconds,
              RequestToken = token,
              RequireSsl = false,
              Success = true
          };
      }

  LoginModelOAuth model look like,

  public class LoginModelOAuth
  {
  
      public string RequestToken { get; set; }      
  
  
      public string ErrorMessage { get; set; }
  
      public string ReturnUrl { get; set; }
  }

  When i execute the client side code i receive following error

  500 Internal Server Error

  So i debugged server side code and in server side I got an error corresponding to this code

  var response = OAuthServiceBase.Instance.RequestToken();

   , and the error is

  NullReferenceException was unhandled by user code
  
    "Object reference not set to an instance of an object."

  Will it work for web api?

  If not, please suggest me any tutorial that would help.

  Thanks.

  
  
  
  
  
  
  
  
  

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  jeppevkris

  Member

  2 Points

  1 Post

  Re: Implementation of two legged OAuth 2.0 for WebApi

  Sep 26, 2012 08:44 PM|LINK

  I'm pretty sure the problem is that the Instance of OAuthServiceBase is null. I downloaded the code. It is initialized in the OauthAuthenticationModule. Have you remembered to include it in the webconfig?

  <httpModules>
        <add name="OAuthAuthentication" type="OAuth2.Mvc.Module.OAuthAuthenticationModule, OAuth2.Mvc, Version=1.0.0.0, Culture=neutral"/>
      </httpModules>

  
  
  

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  jiggidy03

  Member

  2 Points

  1 Post

  Re: Implementation of two legged OAuth 2.0 for WebApi

  Jan 15, 2013 03:35 AM|LINK

  Hey there kishore.eferns, I'm trying to do the exact same thing as you (create a mvc4 webapi project using 2-legged OAuth). Were you able to find a solution to your problems? Do you have a demo project that you could upload somewhere? Did you come across any better more up to date tutorials?

  Any help would be greatly appreciated!

  Thanks.