Before a fetch is sent, the browser will send a request method OPTIONS to confirm that the API will accept the request from a script with a particular origin. Chrome shows that the my Axum server i...

I'm trying to add a request id to each tracing event. I can do it with tower_http::trace like this: #[derive(Clone)] pub struct RequestSpan; impl<B> tower_http::trace::MakeSpan<B> for ...