gistfile1.txt

pub trait ClientExt<T: Service<Request=Frame,Response=Frame,Future=FrameFuture,Error=io::Error>> {
    fn service(&self) -> Rc<RefCell<T>>;
    fn session(&self) -> Rc<RefCell<ClientSession>>;
    fn authenticate(&self) -> Box<Future<Item = (), Error = io::Error>> {
        let session = self.session().clone();
        let service = self.service().clone();

        let hello_frame = session.borrow().make_hello();
        let hello_future = service.borrow().call(hello_frame);
        let ret = hello_future.and_then(|hello_resp| {
            let initiate = session.borrow_mut().make_initiate(&hello_resp).unwrap();
            service.borrow().call(initiate).and_then(|_| ok(()))
        });

        Box::new(ret)
    }
}