How to extract the template uri from a request

[andylokandy]

A low cardinality path is required for creating a opentelemetry trace span, which is usually a uri template like /v1/users/{user_id}. Is it possible to extract it from poem::Request?

On axum, it can be extracted like this:

fn get_request_span_name(req: &Request) -> String {
    let method = req.method().as_str();
    if let Some(target) = req.extensions().get::<MatchedPath>() {
        format!("{} {}", method, target.as_str())
    } else {
        method.to_string()
    }
}