Iniciar sesión con Linkedin

Question

¿Cómo se implementaría un método de inicio de sesión para Linkedin, para que la gente simplemente haga clic en un botón y use su cuenta de Linkedin para iniciar sesión, al igual que en Facebook o Twitter? Ambos usan OAuth, pero encontré bibliotecas específicas para ellos que son muy fáciles de usar. Para Linkedin, solo encontré un código de muestra en DotNetOpenAuth, pero no puedo hacer que tenga ningún sentido de.

¿Hay alguna biblioteca que pueda usar para facilitar una función de inicio de sesión para Linkedin? ¿O algún tutorial sobre cómo hacer eso en ASP.NET MVC con DotNetOpenAuth 4?

Answer 1

Esto es lo que parece ser una muestra bastante sólido

http://mrsarker.wordpress.com/2011/08/20/linkedin-rest-api-in-asp-net-mvc/

[HandleError] 
public class LinkedInController : Controller 
{ 
    public ActionResult index() 
    { 
     return AuthenticateToLinkedIn(); 
    } 

    static string token_secret = ""; 
    public ActionResult AuthenticateToLinkedIn() 
    { 
     var credentials = new OAuthCredentials 
     { 
      CallbackUrl = "http://localhost/home/callback", 
      ConsumerKey = ConfigurationManager.AppSettings["ConsumerKey"], 
      ConsumerSecret = ConfigurationManager.AppSettings["ConsumerSecret"], 
      Verifier = "123456", 
      Type = OAuthType.RequestToken 
     }; 

     var client = new RestClient { Authority = "https://api.linkedin.com/uas/oauth", Credentials = credentials }; 
     var request = new RestRequest { Path = "requestToken" }; 
     RestResponse response = client.Request(request); 

     token = response.Content.Split('&').Where(s => s.StartsWith("oauth_token=")).Single().Split('=')[1]; 
     token_secret = response.Content.Split('&').Where(s => s.StartsWith("oauth_token_secret=")).Single().Split('=')[1]; 
     Response.Redirect("https://api.linkedin.com/uas/oauth/authorize?oauth_token=" + token); 
     return null; 
    } 

    string token = ""; 
    string verifier = ""; 
    public ActionResult Callback() 
    { 
     token = Request["oauth_token"]; 
     verifier = Request["oauth_verifier"]; 
     var credentials = new OAuthCredentials 
     { 
      ConsumerKey = ConfigurationManager.AppSettings["ConsumerKey"], 
      ConsumerSecret = ConfigurationManager.AppSettings["ConsumerSecret"], 
      Token = token, 
      TokenSecret = token_secret, 
      Verifier = verifier, 
      Type = OAuthType.AccessToken, 
      ParameterHandling = OAuthParameterHandling.HttpAuthorizationHeader, 
      SignatureMethod = OAuthSignatureMethod.HmacSha1, 
      Version = "1.0" 
     }; 

     var client = new RestClient { Authority = "https://api.linkedin.com/uas/oauth", Credentials = credentials, Method = WebMethod.Post }; 
     var request = new RestRequest { Path = "accessToken" }; 
     RestResponse response = client.Request(request); 
     string content = response.Content; 


     string accessToken = response.Content.Split('&').Where(s => s.StartsWith("oauth_token=")).Single().Split('=')[1]; 
     string accessTokenSecret = response.Content.Split('&').Where(s => s.StartsWith("oauth_token_secret=")).Single().Split('=')[1]; 

     var company = new LinkedInService(accessToken, accessTokenSecret).GetCompany(162479);    

     // Some commented call to API 
     //company = new LinkedInService(accessToken, accessTokenSecret).GetCompanyByUniversalName("linkedin"); 
     // var companies = new LinkedInService(accessToken, accessTokenSecret).GetCompaniesByEmailDomain("apple.com");    
     // var companies1 = new LinkedInService(accessToken, accessTokenSecret).GetCompaniesByEmailDomain("linkedin.com");   
     // var companies2= new LinkedInService(accessToken, accessTokenSecret).GetCompaniesByIdAnduniversalName("162479", "linkedin"); 
     //var people = new LinkedInService(accessToken, accessTokenSecret).GetPersonById("f7cp5sKscd"); 
     //var people = new LinkedInService(accessToken, accessTokenSecret).GetCurrentUser(); 

     //string url = Url.Encode("http://bd.linkedin.com/pub/rakibul-islam/37/522/653"); 
     //var people = new LinkedInService(accessToken, accessTokenSecret).GetPeoPleByPublicProfileUrl(url); 
     //var peopleSearchresult = new LinkedInService(accessToken, accessTokenSecret).SearchPeopleByKeyWord("Princes"); 

     var peopleSearchresult = new LinkedInService(accessToken, accessTokenSecret).GetPeopleByFirstName("Mizan"); 
     String companyName = company.Name; 
     return Content(companyName);    
    } 
} 


public class LinkedInService 
{ 
    private const string URL_BASE = "http://api.linkedin.com/v1"; 
    public static string ConsumerKey { get { return ConfigurationManager.AppSettings["ConsumerKey"]; } } 
    public static string ConsumerKeySecret { get { return ConfigurationManager.AppSettings["ConsumerSecret"]; } } 
    public string AccessToken { get; set; } 
    public string AccessTokenSecret { get; set; } 

    public LinkedInService(string accessToken, string accessTokenSecret) 
    { 
     this.AccessToken = accessToken; 
     this.AccessTokenSecret = accessTokenSecret; 
    } 

    private OAuthCredentials AccessCredentials 
    { 
     get 
     { 
      return new OAuthCredentials 
      { 
       Type = OAuthType.AccessToken, 
       SignatureMethod = OAuthSignatureMethod.HmacSha1, 
       ParameterHandling = OAuthParameterHandling.HttpAuthorizationHeader, 
       ConsumerKey = ConsumerKey, 
       ConsumerSecret = ConsumerKeySecret, 
       Token = AccessToken, 
       TokenSecret = AccessTokenSecret 
      }; 
     } 
    } 

    #region Helper 

    private RestResponse GetResponse(string path) 
    { 
     var client = new RestClient() 
     { 
      Authority = URL_BASE, 
      Credentials = AccessCredentials, 
      Method = WebMethod.Get 
     }; 

     var request = new RestRequest { Path = path }; 

     return client.Request(request); 
    } 

    private T Deserialize(string xmlContent) 
    { 
     MemoryStream memoryStream = new MemoryStream(Encoding.ASCII.GetBytes(xmlContent)); 
     XmlSerializer deserializer = new XmlSerializer(typeof(T)); 
     return (T)deserializer.Deserialize(new StringReader(xmlContent)); 
    } 

    #endregion 

    // methods removed for brevity. check the original link for full source 

} 

Answer 2

Si no desea codificar por sí mismo, siempre se puede buscar en una solución de terceros, como solución RPX de JanRain : http://developers.janrain.com/. Le dará el inicio de sesión de LinkedIn y muchos más.