Asp.net mvc FormsAuthentication from a service - asp.net-mvc

Question

I'm looking at the nerddinner code and in their AuthenticationController, they have the following code:
if (String.IsNullOrEmpty(alias)) throw new ArgumentException("Value cannot be null or empty.", "alias");
FormsAuthenticationTicket authTicket = new
FormsAuthenticationTicket(1, //version
userdId.ToString(), // user name
DateTime.Now, //creation
DateTime.Now.AddMinutes(30), //Expiration
createPersistentCookie, //Persistent
alias); //since Classic logins don't have a "Friendly Name"
string encTicket = FormsAuthentication.Encrypt(authTicket);
this.Response.Cookies.Add(new HttpCookie(FormsAuthentication.FormsCookieName, encTicket));
My problem is that I want to move this code into a class that does not inherits from the Controller type. The problem with this is the last line of code where it sets the cookie; Response, which is specific to Controller.
How do I set encTicket to a cookie without having access to the controller? Is there a way to use FormsAuthentication class itself to d this?

Answer 1

You could have a method in your separate class which returns the cookie so that the only thing the controller has to do is add the cookie to the response. IMO cookie management (adding/deleting) is the responsibility of the controller:
var cookie = authService.CreateAuthCookie(userId, alias);
Response.AppendCookie(cookie);

Answer 2

This is how to add the encrypted ticket to the browser cookie without using a controller.
var cookie = new HttpCookie(FormsAuthentication.FormsCookieName, encTicket)
{
Expires = authTicket.Expiration,
Path = FormsAuthentication.FormsCookiePath
};
if (HttpContext.Current != null)
{
HttpContext.Current.Response.Cookies.Add(cookie);
}