public ActionResult Authenticate(string returnUrl)
{
// handle oauth authentication
if (string.IsNullOrEmpty(Request.Form["openid_identifier"]))
{
// handle oauth version 2.0
if (Request.Form["oauth_version"] == "2.0")
{
return(FacebookAuth(returnUrl));
}
}
var response = openid.GetResponse();
if (response == null)
{
// Stage 2: user submitting Identifier
Identifier id;
if (Identifier.TryParse(Request.Form["openid_identifier"], out id))
{
try
{
var request = openid.CreateRequest(Request.Form["openid_identifier"]);
var fetch = new FetchRequest();
fetch.Attributes.AddRequired(WellKnownAttributes.Contact.Email);
request.AddExtension(fetch);
return(request.RedirectingResponse.AsActionResult());
}
catch (ProtocolException ex)
{
ViewData["Message"] = ex.Message;
return(View("Logon"));
}
}
else
{
ViewData["Message"] = "Invalid identifier";
return(View("Logon"));
}
}
else
{
// Stage 3: OpenID Provider sending assertion response
switch (response.Status)
{
case AuthenticationStatus.Authenticated:
UsersModels user = new UsersModels();
var fetch = response.GetExtension <FetchResponse>();
string email = null;
if (fetch != null)
{
email = fetch.GetAttributeValue(WellKnownAttributes.Contact.Email);
}
// for new OpenId
user = user.GetUserByOpenId(response.ClaimedIdentifier);
if (user == null)
{
RegisterOpenId roi = new RegisterOpenId();
roi.ClaimedOpenId = response.ClaimedIdentifier;
roi.FriendlyOpenId = PostHelper.GetFriendlyOpenId(response, email);
roi.ReturnUrl = returnUrl;
roi.Email = email;
return(View(roi));
}
FormsAuthenticationService formAuth = new FormsAuthenticationService();
formAuth.SignIn(response.ClaimedIdentifier, false);
if (!string.IsNullOrEmpty(returnUrl))
{
return(Redirect(returnUrl));
}
else
{
return(RedirectToAction("Index", "Home"));
}
case AuthenticationStatus.Canceled:
ViewData["Message"] = "Canceled at provider";
return(View("Logon"));
case AuthenticationStatus.Failed:
ViewData["Message"] = response.Exception.Message;
return(View("Logon"));
}
}
return(new EmptyResult());
}