Token-based authentication, "auto-login"

[boekhold]

Is there any way to make groovy-wslite attempt an automatic authentication attempt if a request returned UNAUTHORIZED or FORBIDDEN? I'm thinking about logic like:

resp = doRequest()
if (resp.UNAUTHORIZED || resp.FORBIDDEN) {
    authorization.login()
    resp = doRequest()
}

where the HttpAuthorizer implementation has a login() method that makes a login call to the server to obtain a token, and adds that token to the original request.