use hyper::client::connect::{capture_connection, CaptureConnection};
let mut request = http::Request::builder()
   .uri("http://foo.com")
   .body(())
   .unwrap();

let captured_connection = capture_connection(&mut request);

let client = hyper::Client::new();
// success or failure, it will still work fine.
let _ = client.request(request).await;

let connection_info = capture_connection.connection_metadata();