use std::time::Instant;
use tracing::{Instrument, Level};
use crate::{
route::PathPattern, web::RealIp, Endpoint, FromRequest, 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,
}
impl<E: Endpoint> Endpoint for TracingEndpoint<E> {
type Output = Response;
async fn call(&self, req: Request) -> Result<Self::Output> {
let remote_addr = RealIp::from_request_without_body(&req)
.await
.ok()
.and_then(|real_ip| real_ip.0)
.map(|addr| addr.to_string())
.unwrap_or_else(|| req.remote_addr().to_string());
let span = tracing::span!(
target: module_path!(),
Level::INFO,
"request",
remote_addr = %remote_addr,
version = ?req.version(),
method = %req.method(),
uri = %req.original_uri(),
);
if let Some(path_pattern) = req.data::<PathPattern>() {
span.record("path_pattern", path_pattern.0.as_ref());
}
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!(
status = %err.status(),
error = %err,
duration = ?duration,
"error"
);
Err(err)
}
}
}
.instrument(span)
.await
}
}