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use std::future::{ Ready, ready };
use actix_web::{web, FromRequest, Error as ActixWebError, HttpRequest, dev::Payload, http, http::header::HeaderValue, error::ErrorUnauthorized};
use serde::{Serialize, Deserialize};
use jsonwebtoken:: {decode, DecodingKey, errors::Error as JwtError, Algorithm, Validation, TokenData};
use crate::auth::Claims;
use crate::AppState;
#[derive(Serialize, Deserialize, Debug)]
pub struct AuthenticationToken {
pub id: usize,
}
impl FromRequest for AuthenticationToken {
type Error = ActixWebError;
type Future = Ready<Result<Self, Self::Error>>;
fn from_request(req: &HttpRequest, _: &mut Payload) -> Self::Future {
// get auth token from the authorization header
let auth_header: Option<&HeaderValue> = req.headers().get(http::header::AUTHORIZATION);
let auth_token: String = auth_header.unwrap().to_str().unwrap_or("").to_string(); // check errors later
// stop empty and weird (ascii, chinese...) auth_token strings:
if auth_token.is_empty() { return ready(Err(ErrorUnauthorized("Invalid auth token!")))}
let secret: String = req.app_data::<web::Data<AppState>>().unwrap().secret.to_string();
// decode token with secret
let decode: Result<TokenData<Claims>, JwtError> = decode::<Claims>(
&auth_token,
&DecodingKey::from_secret(secret.as_str().as_ref()),
&Validation::new(Algorithm::HS256),
);
println!("{}", auth_token);
// return authenticationtoken
match decode {
Ok(token) => ready(Ok(AuthenticationToken { id: token.claims.id })),
Err(_) => ready(Err(ErrorUnauthorized("Unauthorized!"))),
}
}
}
/* Example execution in curl:
curl localhost:8000/auth/protected -H "Accept: application/json" -H "Authorization: eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6MSwiZXhwIjoxNzY5MjAyNjU1fQ.QbWkgjmbmMwLJnia6vd67EfRkf6y-4nw572g-Nk0BOE"
*/
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