Implementacion de API OAuth Chaira en MVC Razor C#. Iniciar sesión y obtener información basica del usuario logeado.

HomeController.cs

using System.Web.Mvc;
using Helpers;
using System.Web.Security;

namespace Project.Controllers {

  [AllowAnonymous]
  public class HomeController : Controller {

    [HttpGet]
    public ActionResult Index(string code, string error, string state) {
      if (!string.IsNullOrEmpty(code)) {
        RequestChaira.ResponseData response_data = RequestChaira.requestAccessToken(code);
        RequestChaira.PersonProfile person_profile = RequestChaira.requestResource(RequestChaira.PUBLIC_PROFILE, response_data.access_token);

        if (response_data.scope_ != null) {        
          RequestChaira.PersonProfile data_person = response_data.scope_[0] as RequestChaira.PersonProfile;

          /*
            TODO: Aquì tu còdigo de inicio de sesiòn.
            P.ej: Redireccion al formulario de dashboard,
            almacenamiento de los datos de la variable data_person, etc.            
          */
          return View("../Usuario/Perfil");
        } else {
          return Content("Scope_ es null. Ha ocurrido un error al iniciar la sesiòn");
        }
      } else {
        return View();
      }
    }
  }
}

RequestChaira.cs

using RestSharp;
using System;
using Newtonsoft.Json;
using System.Collections.Generic;

namespace Helpers {
  public class RequestChaira {

    #region constantes para configuración
    public static readonly string API_URL = "http://chaira.udla.edu.co/api/v0.1";
    public static readonly string REDIRECT_URL = "http://localhost:3000";
    public static readonly string CLIENT_ID = "919207462918";
    public static readonly string CLIENT_SECRET = "l31dj7e645jww7po9xe42gymr0oxkn";
    #endregion

    #region Scopes
    public static readonly string PUBLIC_PROFILE = "public_profile";
    public static readonly string STUDENT_ACADEMIC_INFORMATION = "student_academic_information";
    public static readonly string SCHEDULE = "schedule";
    public static readonly string SCHEDULE_PROFESSOR = "schedule_professor";
    #endregion

    /**
     * <summary>
     *  Realiza peticion POST al api de Chairá para solicitar un token valido
     * </summary>
     * <param name="code">
     *  Codigo de autorización generado por 
     *  el API Chaira luego de haber iniciado sesión
     * </param>
     */
    public static ResponseData requestAccessToken(string code) {
      var client = new RestClient(API_URL + "/oauth2/authorize.asmx/token");
      // client.Authenticator = new HttpBasicAuthenticator(username, password);

      var request = new RestRequest("", Method.POST);
      request.AddParameter("grant_type", "authorization_code");
      request.AddParameter("code", code); // adds to POST or URL querystring based on Method
      request.AddParameter("redirect_uri", "http://localhost:3000");
      request.AddParameter("client_id", CLIENT_ID);
      request.AddParameter("client_secret", CLIENT_SECRET);
      request.AddParameter("state", "xyz");

      request.AddHeader("Content-type", "application/json");

      // automatically deserialize result
      IRestResponse<ResponseData> response2 = client.Execute<ResponseData>(request);
      if (response2.StatusCode == System.Net.HttpStatusCode.OK) {

        ResponseData rd = JsonConvert.DeserializeObject<ResponseData>(response2.Content);
        if (!string.IsNullOrEmpty(rd.access_token) && !string.IsNullOrEmpty(rd.refresh_token)) {
          rd.scope_ = JsonConvert.DeserializeObject<List<PersonProfile>>(rd.scope);

          return rd;
        }
      }
      return new ResponseData();
    }

    public static bool requestLogout(string token) {
      var client = new RestClient(API_URL + "/oauth2/resource.asmx/logout");

      var request = new RestRequest("", Method.POST);
      request.AddParameter("access_token", token);

      request.AddHeader("Content-type", "application/json");

      // or automatically deserialize result
      // return content type is sniffed but can be explicitly set via RestClient.AddHandler();
      IRestResponse<ResponseData> response2 = client.Execute<ResponseData>(request);
      return response2.StatusCode == System.Net.HttpStatusCode.OK;
      // var name = response2.Data.description;
    }

    /**
     * <summary>
     * Solicita información segun un scope ya definido. 
     * </summary>
     * <param name="scope">Recurso a solicitar: Información personal, horarios...</param>
     * <param name="token">Token de autorización para peticiones</param>
     */
    public static PersonProfile requestResource(string scope, string token) {
      var client = new RestClient(API_URL + "/oauth2/resource.asmx/scope");

      var request = new RestRequest("", Method.POST);
      request.AddParameter("access_token", token);
      request.AddParameter("scope", scope);

      request.AddHeader("Content-type", "application/json");

      IRestResponse<PersonProfile> response2 = client.Execute<PersonProfile>(request);
      return response2.Data as PersonProfile;
    }

    /**
     * <summary>Clase que almacena todos los datos de la petición</summary>
     */
    public class ResponseData {
      #region variables de error
      public string type { get; set; }
      public string description { get; set; }
      public string state { get; set; }
      #endregion
        
      #region variables de respuesta valida
      public string access_token { get; set; }
      public string token_type { get; set; }
      public string expires_in { get; set; }
      public string scope { get; set; }
      public List<PersonProfile> scope_ { get; set; }
      public string refresh_token { get; set; }
      #endregion

      public ResponseData() { }
    }

    public class PersonProfile {

      #region PublicProfile
      public string Nombres { get; set; }
      public string Apellidos { get; set; }
      public string Genero { get; set; }
      public string RH { get; set; }
      public string Correo { get; set; }
      public string Rol { get; set; }
      public string Departamento { get; set; }
      public string Municipio { get; set; }
      public string Estado { get; set; }
      public string Foto { get; set; }
      #endregion

      #region PrivateProfile
      public string Celular { get; set; }
      public string Direccion { get; set; }
      public string Documento { get; set; }
      public string FechaNacimiento { get; set; }
      public string TipoDocumento { get; set; }
      #endregion

      public PersonProfile() { }
    }

    public class AcademicInformation {
      public string Codigo { get; set; }
      public string Credito { get; set; }
      public string Estado { get; set; }
      public string Facultad { get; set; }
      public string NombreMateria { get; set; }
      public string Pensum { get; set; }
      public string Programa { get; set; }
      public int Semestre { get; set; }
      public int UbicacionSemestral { get; set; }

      public AcademicInformation() { }
    }
  }
}