How to use Path Extractor in Middleware

[yuhaya]

hi, I want to use the Path extractor in the middleware to do authorization authentication through the url parameter，The following writing method does not work properly, Looking at the documentation, no examples of Path parameters in middleware were found

pub async fn auth<B>(
    mut req: Request<B>,
    next: Next<B>,
) -> Result<Response, StatusCode> {
    match req.extensions().get::<Path<(String, String, String)>>() {
        Some(Path((username, password, mac))) => {
            //some code auth
            //req.extensions_mut().insert(robot_data);
            Ok(next.run(req).await)
        }
        None => {
            Err(StatusCode::UNAUTHORIZED)
        },
    }

}

[yuhaya]

found a way

pub async fn auth<B>(
    Path((username, password, mac)): Path<(String, String, String)>,
    Host(addr): Host,
    mut req: Request<B>,
    next: Next<B>,
) -> Result<Response, StatusCode> {
//...
}