Function `on_informational`

fn on_informational<B, F>(req: &mut Request<B>, callback: F)
where
    F: Fn(Response<'_>) + Send + Sync + 'static

Add a callback for 1xx informational responses.

Example

# let some_body = ();
let mut req = hyper::Request::new(some_body);

hyper::ext::on_informational(&mut req, |res| {
    println!("informational: {:?}", res.status());
});

// send request on a client connection...