public async Task <IActionResult> Callback()
{
// read external identity from the temporary cookie
var externalResult = await HttpContext.AuthenticateAsync(IdentityServerConstants.ExternalCookieAuthenticationScheme);
var result = (await _externalService.ProcessExternalAuthentication(externalResult))
.ValueOr(e => throw new Exception(e));
var localSignInProps = new AuthenticationProperties {
IsPersistent = false
};
result.ExternalIdToken.MatchSome(extIdToken =>
{
// if the external provider issued an id_token, we'll keep it for signout
localSignInProps.StoreTokens(new[] { new AuthenticationToken {
Name = "id_token", Value = extIdToken
} });
});
await HttpContext.SignInAsync(result.IsUser, localSignInProps);
// delete temporary cookie used during external authentication
await HttpContext.SignOutAsync(IdentityServerConstants.ExternalCookieAuthenticationScheme);
return(result.UseNativeClientRedirect
? this.LoadingPage("Redirect", result.ReturnUrl)
: Redirect(result.ReturnUrl));
}