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// Copyright 2017 Dmitry Tantsur <divius.inside@gmail.com>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//! Base code for authentication.
use std::fmt::Debug;
use reqwest::{Method, RequestBuilder, Url};
use super::super::Result;
/// Trait for an authentication method.
///
/// An OpenStack authentication method is expected to be able to:
///
/// 1. get an authentication token to use when accessing services,
/// 2. get an endpoint URL for the given service type.
///
/// An authentication method should cache the token as long as it's valid.
pub trait AuthMethod: BoxedClone + Debug {
/// Default endpoint interface that is used when none is provided.
fn default_endpoint_interface(&self) -> String {
String::from("public")
}
/// Region used with this authentication (if any).
fn region(&self) -> Option<String> { None }
/// Get a URL for the requested service.
fn get_endpoint(&self, service_type: String,
endpoint_interface: Option<String>) -> Result<Url>;
/// Create an authenticated request.
fn request(&self, method: Method, url: Url) -> Result<RequestBuilder>;
/// Refresh the authentication (renew the token, etc).
fn refresh(&mut self) -> Result<()>;
}
/// Helper trait to allow cloning of sessions.
pub trait BoxedClone {
/// Clone the authentication method.
fn boxed_clone(&self) -> Box<AuthMethod>;
}
impl<T> BoxedClone for T where T: 'static + AuthMethod + Clone {
fn boxed_clone(&self) -> Box<AuthMethod> {
Box::new(self.clone())
}
}
impl Clone for Box<AuthMethod> {
fn clone(&self) -> Box<AuthMethod> {
self.boxed_clone()
}
}