92 lines
2.9 KiB
Rust
92 lines
2.9 KiB
Rust
use rocket::fairing::{Fairing, Info, Kind};
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use rocket::http::{ContentType, Header, Method, Status};
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use rocket::{Data, Request, Response};
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use rusty_ulid::generate_ulid_string;
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use std::mem;
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use tracing::{span, span::Entered, Level, Span};
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struct SpanWrapper<'a> {
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span: Box<Span>,
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entered: Entered<'a>,
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}
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pub struct TraceRequest;
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impl Fairing for TraceRequest {
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fn info(&self) -> Info {
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Info {
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name: "Tracing spans per request",
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kind: Kind::Request | Kind::Response,
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}
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}
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fn on_request(&self, request: &mut Request, _: &Data) {
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let reqid: String = match request.headers().get_one("X-Request-Id") {
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Some(reqid) => reqid.to_string(),
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None => {
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let reqid = generate_ulid_string();
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request.add_header(Header::new("X-Request-Id", reqid.clone()));
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reqid
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}
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};
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request.local_cache(|| {
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let span = span!(
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Level::INFO,
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"request",
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method = &request.method().to_string()[..],
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uri = &request.uri().to_string()[..],
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addr = &request
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.client_ip()
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.map(|ip| ip.to_string())
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.unwrap_or("unknown".to_string())[..],
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request_id = &reqid[..],
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);
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let span = Box::new(span);
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let entered = span.enter();
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let entered_lt = unsafe { mem::transmute::<_, Entered<'static>>(entered) };
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Box::new(SpanWrapper {
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entered: entered_lt,
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span: span,
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})
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});
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}
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fn on_response(&self, request: &Request, response: &mut Response) {
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let span: &Box<SpanWrapper> = request.local_cache(|| {
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Box::new({
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let span = error_span!(
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"somehow the span wasn't put into the request, neat",
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method = &request.method().to_string()[..],
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uri = &request.uri().to_string()[..],
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address = &request
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.real_ip()
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.map(|ip| ip.to_string())
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.unwrap_or("unknown".to_string())[..],
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);
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let span = Box::new(span);
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let entered = span.enter();
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let entered_lt = unsafe { mem::transmute::<_, Entered<'static>>(entered) };
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SpanWrapper {
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entered: entered_lt,
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span: span,
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}
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})
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});
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match request.headers().get_one("X-Request-Id") {
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Some(reqid) => {
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response.set_header(Header::new("X-Request-Id", format!("{}", reqid)));
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}
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None => {}
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};
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info!(
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status_code = &response.status().code,
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status_reason = response.status().reason
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);
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drop(span);
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}
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}
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