Trait OnRequest 

pub trait OnRequest<B>:
    Send
    + Sync
    + 'static {
    // Required method
    fn on_request(&self, request: &Request<B>, span: &Span);
}

Available on crate feature http only.

Trait used to tell Trace what to do when a request is received.

See the module docs for details on exactly when the on_request callback is called.

Required Methods

fn on_request(&self, request: &Request<B>, span: &Span)

Do the thing.

span is the tracing Span, corresponding to this request, produced by the closure passed to TraceLayer::make_span_with. It can be used to record field values that weren’t known when the span was created.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<B> OnRequest<B> for ()

fn on_request(&self, _: &Request<B>, _: &Span)

Implementors

impl<B, F> OnRequest<B> for F

where F: Fn(&Request<B>, &Span) + Send + Sync + 'static,

impl<B> OnRequest<B> for DefaultOnRequest