Пример #1
0
        public async Task <IHttpActionResult> GetExternalLogin(string provider, string error = null)
        {
            if (error != null)
            {
                return(Redirect(Url.Content("~/") + "#error=" + Uri.EscapeDataString(error)));
            }

            if (!User.Identity.IsAuthenticated)
            {
                return(new ChallengeResult(provider, this));
            }

            ExternalLoginData externalLogin = ExternalLoginData.FromIdentity(User.Identity as ClaimsIdentity);

            if (externalLogin == null)
            {
                return(InternalServerError());
            }

            if (externalLogin.LoginProvider != provider)
            {
                Authentication.SignOut(DefaultAuthenticationTypes.ExternalCookie);
                return(new ChallengeResult(provider, this));
            }

            AppUser user = await UserManager.FindAsync(new UserLoginInfo(externalLogin.LoginProvider,
                                                                         externalLogin.ProviderKey));

            bool hasRegistered = user != null;

            if (hasRegistered)
            {
                Authentication.SignOut(DefaultAuthenticationTypes.ExternalCookie);

                ClaimsIdentity oAuthIdentity = await user.GenerateUserIdentityAsync(UserManager,
                                                                                    OAuthDefaults.AuthenticationType);

                ClaimsIdentity cookieIdentity = await user.GenerateUserIdentityAsync(UserManager,
                                                                                     CookieAuthenticationDefaults.AuthenticationType);

                AuthenticationProperties properties = OAuthProvider.CreateProperties(user);
                Authentication.SignIn(properties, oAuthIdentity, cookieIdentity);
            }
            else
            {
                IEnumerable <Claim> claims   = externalLogin.GetClaims();
                ClaimsIdentity      identity = new ClaimsIdentity(claims, OAuthDefaults.AuthenticationType);
                Authentication.SignIn(identity);
            }

            return(Ok());
        }