use actix_http::{error::PayloadError, header::map::HeaderMap, Payload, RequestHeadType};
use actix_service::Service;
use awc::{error::SendRequestError, middleware::Transform, ConnectRequest, ConnectResponse};
use bytes::Bytes;
use futures_core::stream::Stream;
use std::{
future::Future,
pin::Pin,
task::{Context, Poll},
};
use tracing::{instrument::Instrumented, Instrument, Span};
#[cfg(feature = "opentelemetry_0_13")]
use opentelemetry_0_13_pkg as opentelemetry;
#[cfg(feature = "opentelemetry_0_14")]
use opentelemetry_0_14_pkg as opentelemetry;
#[cfg(feature = "opentelemetry_0_15")]
use opentelemetry_0_15_pkg as opentelemetry;
#[cfg(feature = "opentelemetry_0_16")]
use opentelemetry_0_16_pkg as opentelemetry;
#[cfg(feature = "opentelemetry_0_17")]
use opentelemetry_0_17_pkg as opentelemetry;
#[cfg(feature = "opentelemetry_0_18")]
use opentelemetry_0_18_pkg as opentelemetry;
#[cfg(feature = "opentelemetry_0_19")]
use opentelemetry_0_19_pkg as opentelemetry;
#[cfg(feature = "opentelemetry_0_20")]
use opentelemetry_0_20_pkg as opentelemetry;
#[cfg(feature = "opentelemetry_0_13")]
use tracing_opentelemetry_0_12_pkg as tracing_opentelemetry;
#[cfg(feature = "opentelemetry_0_14")]
use tracing_opentelemetry_0_13_pkg as tracing_opentelemetry;
#[cfg(feature = "opentelemetry_0_15")]
use tracing_opentelemetry_0_14_pkg as tracing_opentelemetry;
#[cfg(feature = "opentelemetry_0_16")]
use tracing_opentelemetry_0_16_pkg as tracing_opentelemetry;
#[cfg(feature = "opentelemetry_0_17")]
use tracing_opentelemetry_0_17_pkg as tracing_opentelemetry;
#[cfg(feature = "opentelemetry_0_18")]
use tracing_opentelemetry_0_18_pkg as tracing_opentelemetry;
#[cfg(feature = "opentelemetry_0_19")]
use tracing_opentelemetry_0_19_pkg as tracing_opentelemetry;
#[cfg(feature = "opentelemetry_0_20")]
use tracing_opentelemetry_0_20_pkg as tracing_opentelemetry;
#[cfg(any(
feature = "opentelemetry_0_13",
feature = "opentelemetry_0_14",
feature = "opentelemetry_0_15",
feature = "opentelemetry_0_16",
feature = "opentelemetry_0_17",
feature = "opentelemetry_0_18",
feature = "opentelemetry_0_19",
feature = "opentelemetry_0_20"
))]
pub fn root_span() -> Span {
let span = tracing::info_span!("Root span", trace_id = tracing::field::Empty,);
{
use opentelemetry::trace::TraceContextExt;
use tracing_opentelemetry::OpenTelemetrySpanExt;
#[cfg(not(any(
feature = "opentelemetry_0_17",
feature = "opentelemetry_0_18",
feature = "opentelemetry_0_19",
feature = "opentelemetry_0_20"
)))]
let trace_id = span.context().span().span_context().trace_id().to_hex();
#[cfg(any(
feature = "opentelemetry_0_17",
feature = "opentelemetry_0_18",
feature = "opentelemetry_0_19",
feature = "opentelemetry_0_20"
))]
let trace_id = {
let id = span.context().span().span_context().trace_id();
format!("{:032x}", id)
};
span.record("trace_id", &tracing::field::display(trace_id));
}
span
}
pub struct Tracing;
pub struct TracingMiddleware<S>(S);
impl<S> Transform<S, ConnectRequest> for Tracing
where
S: Service<ConnectRequest, Response = ConnectResponse, Error = SendRequestError>,
{
type Transform = TracingMiddleware<S>;
fn new_transform(self, service: S) -> Self::Transform {
TracingMiddleware(service)
}
}
impl<S> Service<ConnectRequest> for TracingMiddleware<S>
where
S: Service<ConnectRequest, Response = ConnectResponse, Error = SendRequestError>,
{
type Response = ConnectResponse;
type Error = SendRequestError;
type Future = Instrumented<TracingFuture<S::Future>>;
fn poll_ready(&self, ctx: &mut core::task::Context<'_>) -> Poll<Result<(), Self::Error>> {
self.0.poll_ready(ctx)
}
fn call(&self, mut req: ConnectRequest) -> Self::Future {
let request_head = match &req {
ConnectRequest::Client(head_type, _, _) => head_type.as_ref(),
ConnectRequest::Tunnel(head, _) => head,
};
let span = tracing::info_span!(
"HTTP Client",
otel.kind = "client",
otel.status_code = tracing::field::Empty,
http.method = tracing::field::display(&request_head.method),
http.url = tracing::field::display(&request_head.uri),
http.flavor = tracing::field::Empty,
http.status_code = tracing::field::Empty,
net.peer.ip = tracing::field::Empty,
exception.message = tracing::field::Empty,
exception.details = tracing::field::Empty,
);
match request_head.version {
actix_http::Version::HTTP_09 => {
span.record("http.flavor", "0.9");
}
actix_http::Version::HTTP_10 => {
span.record("http.flavor", "1.0");
}
actix_http::Version::HTTP_11 => {
span.record("http.flavor", "1.1");
}
actix_http::Version::HTTP_2 => {
span.record("http.flavor", "2.0");
}
actix_http::Version::HTTP_3 => {
span.record("http.flavor", "3.0");
}
_ => (),
}
if let Some(peer_ip) = &request_head.peer_addr {
span.record("net.peer.ip", &tracing::field::display(&peer_ip.ip()));
}
match &mut req {
ConnectRequest::Client(ref mut head_type, _, _) => match head_type {
RequestHeadType::Owned(ref mut head) => {
record_otel(head.headers_mut(), &span);
}
RequestHeadType::Rc(_, ref mut extras) => {
let mut owned = extras.take().unwrap_or_default();
record_otel(&mut owned, &span);
*extras = Some(owned);
}
},
ConnectRequest::Tunnel(head, _) => record_otel(head.headers_mut(), &span),
}
TracingFuture {
future: span
.in_scope(|| self.0.call(req))
.instrument(tracing::trace_span!(parent: None, "Http Request Inner")),
}
.instrument(span)
}
}
pin_project_lite::pin_project! {
pub struct TracingFuture<F> {
#[pin]
future: Instrumented<F>,
}
}
impl<F> Future for TracingFuture<F>
where
F: Future<Output = Result<ConnectResponse, SendRequestError>>,
{
type Output = Result<ConnectResponse, SendRequestError>;
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
let this = self.as_mut().project();
let span = Span::current();
let future = this.future;
future
.poll(cx)
.map_ok(|succ| match succ {
ConnectResponse::Client(client_response) => {
let status: i32 = client_response.status().as_u16().into();
span.record("http.status_code", status);
if client_response.status().is_client_error() {
span.record("otel.status_code", "ERROR");
}
ConnectResponse::Client(client_response.map_body(|_, payload| {
let payload = InstrumentedBody::new(payload);
let payload: Pin<Box<dyn Stream<Item = Result<Bytes, PayloadError>>>> =
Box::pin(payload);
Payload::Stream { payload }
}))
}
ConnectResponse::Tunnel(response_head, etc) => {
let status: i32 = response_head.status.as_u16().into();
span.record("http.status_code", status);
if response_head.status.is_client_error() {
span.record("otel.status_code", "ERROR");
}
ConnectResponse::Tunnel(response_head, etc)
}
})
.map_err(|err| {
span.record("otel.status_code", "ERROR");
span.record(
"exception.message",
&tracing::field::display(&format!("{}", err)),
);
span.record(
"exception.details",
&tracing::field::display(&format!("{:?}", err)),
);
#[cfg(feature = "emit_event_on_error")]
tracing::warn!("Error in request: {}", err);
err
})
}
}
pin_project_lite::pin_project! {
struct InstrumentedBody<S> {
span: Option<Span>,
dummy_span: Option<Span>,
#[pin]
body: S,
}
}
impl<S> InstrumentedBody<S>
where
S: Stream<Item = Result<Bytes, PayloadError>>,
{
fn new(body: S) -> InstrumentedBody<S> {
InstrumentedBody {
span: None,
dummy_span: None,
body,
}
}
}
impl<S> Stream for InstrumentedBody<S>
where
S: Stream<Item = Result<Bytes, PayloadError>> + Unpin,
{
type Item = <S as Stream>::Item;
fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
let this = self.as_mut().project();
let span = this
.span
.get_or_insert_with(|| tracing::info_span!("HTTP Client Response Body"));
let dummy_span = this.dummy_span.get_or_insert_with(|| {
tracing::trace_span!(parent: None, "HTTP Client Response Body Inner")
});
let body = this.body;
let res = span.in_scope(|| dummy_span.in_scope(|| body.poll_next(cx)));
match res {
Poll::Ready(None) => {
this.span.take();
this.dummy_span.take();
Poll::Ready(None)
}
otherwise => otherwise,
}
}
}
#[derive(Debug)]
struct RequestHeaderCarrier<'a> {
#[allow(dead_code)]
headers: &'a mut HeaderMap,
}
#[cfg(any(
feature = "opentelemetry_0_13",
feature = "opentelemetry_0_14",
feature = "opentelemetry_0_15",
feature = "opentelemetry_0_16",
feature = "opentelemetry_0_17",
feature = "opentelemetry_0_18",
feature = "opentelemetry_0_19",
feature = "opentelemetry_0_20"
))]
impl<'a> opentelemetry::propagation::Injector for RequestHeaderCarrier<'a> {
fn set(&mut self, key: &str, value: String) {
let f = || {
use actix_http::header::{HeaderName, HeaderValue};
use std::convert::TryFrom;
let key = HeaderName::from_bytes(key.as_bytes())
.map_err(|e| {
tracing::warn!("Failed to inject header {}: {}", key, e);
})
.ok()?;
let value = HeaderValue::try_from(value)
.map_err(|e| {
tracing::warn!("Failed to inject header value for {}: {}", key, e);
})
.ok()?;
self.headers.insert(key, value);
Some(())
};
let _ = (f)();
}
}
fn record_otel(_headers: &mut HeaderMap, _span: &Span) {
#[cfg(any(
feature = "opentelemetry_0_13",
feature = "opentelemetry_0_14",
feature = "opentelemetry_0_15",
feature = "opentelemetry_0_16",
feature = "opentelemetry_0_17",
feature = "opentelemetry_0_18",
feature = "opentelemetry_0_19",
feature = "opentelemetry_0_20"
))]
{
let span = _span;
let headers = _headers;
use tracing_opentelemetry::OpenTelemetrySpanExt;
let mut carrier = RequestHeaderCarrier { headers };
let context = span.context();
opentelemetry::global::get_text_map_propagator(|propagator| {
propagator.inject_context(&context, &mut carrier);
});
};
}