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chore(gax-internal): inject diagnostic headers conditionally for integration tests #5030

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chore(gax-internal): inject diagnostic headers conditionally for integration tests #5030

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30 changes: 30 additions & 0 deletions src/gax-internal/src/observability/grpc_tracing.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -188,6 +188,21 @@ where
let resource_name = req.extensions().get::<ResourceName>().map(|r| r.as_str());
let span = create_grpc_span(req.uri(), &self.layer.inner, attempt_count, resource_name);
crate::observability::propagation::inject_context(&span, req.headers_mut());

#[cfg(google_cloud_unstable_tracing)]
if let Ok(headers) = std::env::var("GOOGLE_CLOUD_TEST_EXTRA_HEADERS") {
for header in headers.split(',') {
if let Some((k, v)) = header.split_once('=') {
if let (Ok(name), Ok(val)) = (
http::header::HeaderName::from_bytes(k.trim().as_bytes()),
http::header::HeaderValue::from_str(v.trim()),
) {
req.headers_mut().insert(name, val);
}
}
}
}

let future = self.inner.call(req);
ResponseFuture {
inner: future,
Expand Down Expand Up @@ -244,6 +259,21 @@ where
&tracing::Span::current(),
req.headers_mut(),
);

#[cfg(google_cloud_unstable_tracing)]
if let Ok(headers) = std::env::var("GOOGLE_CLOUD_TEST_EXTRA_HEADERS") {
for header in headers.split(',') {
if let Some((k, v)) = header.split_once('=') {
if let (Ok(name), Ok(val)) = (
http::header::HeaderName::from_bytes(k.trim().as_bytes()),
http::header::HeaderValue::from_str(v.trim()),
) {
req.headers_mut().insert(name, val);
}
}
}
}

NoTracingFuture {
inner: self.inner.call(req),
_phantom: std::marker::PhantomData,
Expand Down
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