public async Task <IActionResult> LinkLoginCallback()
{
var user = await _userManager.GetUserAsync(User);
if (user == null)
{
throw new ApplicationException($"Unable to load user with ID '{_userManager.GetUserId(User)}'.");
}
var info = await _signInManager.GetExternalLoginInfoAsync();
if (info == null)
{
throw new ApplicationException($"Unexpected error occurred loading external login info for user with ID '{user.Id}'.");
}
var result = await _userManager.AddLoginAsync(user, info);
if (!result.Succeeded)
{
throw new ApplicationException($"Unexpected error occurred adding external login for user with ID '{user.Id}'.");
}
// Clear the existing external cookie to ensure a clean login process
await HttpContext.SignOutAsync(IdentityConstants.ExternalScheme);
StatusMessage = "The external login was added.";
return(RedirectToAction(nameof(ExternalLogins)));
}
public async Task <IActionResult> ExternalLoginCallback(string returnUrl = null, string remoteError = null)
{
if (remoteError != null)
{
ErrorMessage = $"Error from external provider: {remoteError}";
return(RedirectToAction(nameof(Login)));
}
var info = await _signInManager.GetExternalLoginInfoAsync();
if (info == null)
{
return(RedirectToAction(nameof(Login)));
}
// Sign in the user with this external login provider if the user already has a login.
var result = await _signInManager.ExternalLoginSignInAsync(info.LoginProvider, info.ProviderKey, isPersistent : false, bypassTwoFactor : true);
if (result.Succeeded)
{
_logger.LogInformation("User logged in with {Name} provider.", info.LoginProvider);
return(RedirectToLocal(returnUrl));
}
if (result.IsLockedOut)
{
return(RedirectToAction(nameof(Lockout)));
}
else
{
// If the user does not have an account, then ask the user to create an account.
TempData["ReturnUrl"] = returnUrl;
TempData["LoginProvider"] = info.LoginProvider;
var email = info.Principal.FindFirstValue(ClaimTypes.Email);
return(View("ExternalLogin", new ExternalLoginViewModel {
Email = email
}));
}
}