public async Task <IHttpActionResult> Login(string signin = null)
{
Logger.Info("Login page requested");
if (signin.IsMissing())
{
Logger.Error("No signin id passed");
return(HandleNoSignin());
}
if (signin.Length > MaxInputParamLength)
{
Logger.Error("Signin parameter passed was larger than max length");
return(RenderErrorPage());
}
var signInMessage = signInMessageCookie.Read(signin);
if (signInMessage == null)
{
Logger.Error("No cookie matching signin id found");
return(HandleNoSignin());
}
Logger.DebugFormat("signin message passed to login: {0}", JsonConvert.SerializeObject(signInMessage, Formatting.Indented));
var authResult = await userService.PreAuthenticateAsync(signInMessage);
if (authResult != null)
{
if (authResult.IsError)
{
Logger.WarnFormat("user service returned an error message: {0}", authResult.ErrorMessage);
eventService.RaisePreLoginFailureEvent(signin, signInMessage, authResult.ErrorMessage);
return(RenderErrorPage(authResult.ErrorMessage));
}
Logger.Info("user service returned a login result");
eventService.RaisePreLoginSuccessEvent(signin, signInMessage, authResult);
return(SignInAndRedirect(signInMessage, signin, authResult));
}
if (signInMessage.IdP.IsPresent())
{
Logger.InfoFormat("identity provider requested, redirecting to: {0}", signInMessage.IdP);
return(Redirect(context.GetExternalProviderLoginUrl(signInMessage.IdP, signin)));
}
return(await RenderLoginPage(signInMessage, signin));
}
internal static IEnumerable <LoginPageLink> GetLinksFromProviders(this IOwinContext context, IEnumerable <AuthenticationDescription> types, string signInMessageId)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (types != null)
{
return(types.Select(p => new LoginPageLink
{
Text = p.Caption,
Href = context.GetExternalProviderLoginUrl(p.AuthenticationType, signInMessageId)
}));
}
return(Enumerable.Empty <LoginPageLink>());
}