use warp::{http::StatusCode, reject::Reject, Filter, Rejection, Reply};
...
async fn return_error(r: Rejection) -> Result<impl Reply, Rejection> {
    if let Some(error) = r.find::<Error>() {
        Ok(warp::reply::with_status(
            error.to_string(),
            StatusCode::RANGE_NOT_SATISFIABLE,
        ))
    } else if let Some(error) = r.find::<CorsForbidden>() {
        Ok(warp::reply::with_status(
            error.to_string(),
            StatusCode::FORBIDDEN,
        ))
    } else {
        Ok(warp::reply::with_status(
            "Route not found".to_string(),
            StatusCode::NOT_FOUND,
        ))
    }
}
...