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use std::cell::RefCell;
use std::pin::Pin;
use std::rc::Rc;
use std::task::{Context, Poll};
use actix_web::{Error, error};
use actix_web::body::{MessageBody, EitherBody, BoxBody};
use actix_web::dev::{Service, ServiceRequest, ServiceResponse, Transform};
use actix_web::http::header::{HeaderValue};
use futures::{Future, FutureExt};
use futures_core::future::{LocalBoxFuture};
use serde::de::DeserializeOwned;
use actix_utils::future::{ok, Ready};
#[cfg(target_feature="session")]
use actix_session::{Session, SessionExt, {storage::SessionStore}};
use crate::ChimesAuthUser;
use crate::ChimesAuthService;
pub struct ChimesAuthorization<T, P>
where
T: Clone + Sized + ChimesAuthUser<T> + DeserializeOwned,
P: ChimesAuthService<T>
{
#[allow(unused)]
auth_info: Option<T>,
auth_service: Rc<P>,
allow_urls: Rc<Vec<String>>,
header_key: Option<String>,
#[cfg(target_feature="session")]
session_key: Option<String>,
}
impl <T, P> ChimesAuthorization<T, P>
where
T: Clone + Sized + ChimesAuthUser<T> + DeserializeOwned,
P: ChimesAuthService<T>
{
pub fn new(auth_service: P) -> Self {
Self{
auth_info: None,
auth_service: Rc::new(auth_service),
allow_urls: Rc::new(vec![]),
header_key: None,
#[cfg(target_feature="session")]
session_key: None,
}
}
pub fn allow(mut self, url: &String) -> Self {
Rc::get_mut(&mut self.allow_urls)
.unwrap()
.push(url.to_string());
self
}
pub fn header_key(mut self, new_key: &String) -> Self {
self.header_key = Some(new_key.to_string());
self
}
#[cfg(target_feature="session")]
pub fn session_key(mut self, new_key: &String) -> Self {
self.session_key = Some(new_key.to_string());
self
}
}
impl<S, B, T, P> Transform<S, ServiceRequest> for ChimesAuthorization<T, P>
where
S: Service<ServiceRequest, Response=ServiceResponse<B>, Error=Error> + 'static,
S::Future: 'static,
B: MessageBody + 'static,
T: Clone + Sized + ChimesAuthUser<T> + DeserializeOwned,
P: Sized + ChimesAuthService<T> + 'static,
{
type Response = ServiceResponse<EitherBody<B>>;
type Error = Error;
type InitError = ();
type Transform = ChimesAuthenticationMiddleware<S, T, P>;
type Future = actix_utils::future::Ready<Result<Self::Transform, Self::InitError>>;
fn new_transform(&self, service: S) -> Self::Future {
actix_utils::future::ok(ChimesAuthenticationMiddleware {
auth_info: None,
service: Rc::new(RefCell::new(service)),
auth_service: self.auth_service.clone(),
allow_urls: self.allow_urls.clone(),
header_key: self.header_key.clone(),
#[cfg(target_feature="session")]
session_key: self.session_key.clone()
})
}
}
pub struct ChimesAuthenticationMiddleware<S, T, P> {
#[allow(unused)]
auth_info: Option<T>,
service: Rc<RefCell<S>>,
auth_service: Rc<P>,
allow_urls: Rc<Vec<String>>,
header_key: Option<String>,
#[cfg(target_feature="session")]
session_key: Option<String>,
}
impl<S, T, P, B> Service<ServiceRequest> for ChimesAuthenticationMiddleware<S, T, P>
where
S: Service<ServiceRequest, Response = ServiceResponse<B>, Error = Error> + 'static,
S::Future: 'static,
B: MessageBody + 'static,
T: Clone + Sized + ChimesAuthUser<T> + DeserializeOwned,
P: Sized + ChimesAuthService<T> + 'static,
{
type Response = ServiceResponse<EitherBody<B>>;
type Error = Error;
type Future = LocalBoxFuture<'static, Result<ServiceResponse<EitherBody<B>>, Error>>;
fn poll_ready(self: &ChimesAuthenticationMiddleware<S, T, P>, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
self.service.poll_ready(cx)
}
fn call(&self, req: ServiceRequest) -> Self::Future {
let service = self.service.clone();
let auth = self.auth_service.clone();
let url_pattern = req.match_pattern().unwrap_or_default();
let passed_url = self.allow_urls.contains(&url_pattern);
#[cfg(target_feature="session")]
let session = req.get_session();
#[cfg(target_feature="session")]
let default_session_key = "chimes-logged-user".to_string();
#[cfg(target_feature="session")]
let auth_user = session.get::<T>(self.session_key.clone().unwrap_or(default_session_key).as_str()).unwrap();
let header_key = self.header_key.clone().unwrap_or("Authentication".to_string());
Box::pin(async move {
let value = HeaderValue::from_str("").unwrap();
let token = req.headers().get(header_key.as_str()).unwrap_or(&value);
let req_method = req.method().to_string();
if passed_url {
Ok(service.call(req).await?.map_into_left_body())
} else {
#[cfg(not(target_feature= "session"))]
let ust = match token.to_str() {
Ok(st) => {
let us = auth.authenticate(&st.to_string()).await;
us
}
Err(_) => {
None
}
};
#[cfg(target_feature= "session")]
let ust = auth_user;
let permitted = auth.permit(&ust, &req_method, &url_pattern).await;
if permitted {
let res = service.call(req).await?;
Ok(res.map_into_left_body())
} else {
let res = req.error_response(error::ErrorUnauthorized("err"));
Ok(res.map_into_right_body())
}
}
})
}
}
