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use std::time::Instant;
use tracing::{Instrument, Level};
use crate::{Endpoint, IntoResponse, Middleware, Request, Response, Result};
#[derive(Default)]
pub struct Tracing;
impl<E: Endpoint> Middleware<E> for Tracing {
type Output = TracingEndpoint<E>;
fn transform(&self, ep: E) -> Self::Output {
TracingEndpoint { inner: ep }
}
}
pub struct TracingEndpoint<E> {
inner: E,
}
#[async_trait::async_trait]
impl<E: Endpoint> Endpoint for TracingEndpoint<E> {
type Output = Response;
async fn call(&self, req: Request) -> Result<Self::Output> {
let span = tracing::span!(
target: module_path!(),
Level::INFO,
"request",
remote_addr = %req.remote_addr(),
version = ?req.version(),
method = %req.method(),
path = %req.uri(),
);
async move {
let now = Instant::now();
let res = self.inner.call(req).await;
let duration = now.elapsed();
match res {
Ok(resp) => {
let resp = resp.into_response();
tracing::info!(
status = %resp.status(),
duration = ?duration,
"response"
);
Ok(resp)
}
Err(err) => {
tracing::info!(
error = %err,
duration = ?duration,
"error"
);
Err(err)
}
}
}
.instrument(span)
.await
}
}