618aacaa61
Introduces a helper function within tvix-tracing that returns a reqwest tracing middleware that will ingest the traceparent if otlp is enabled. It is feature flagged in tvix-tracing so not every consumer of that library automatically has reqwest in its dependencies. Tested using netcat to verify that the `traceparent` header is there if otlp is enabled and missing if otlp feature is disabled. Change-Id: I5abccae777b725f5ff7382e3686165383c477a39 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11886 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
13 lines
622 B
Rust
13 lines
622 B
Rust
use reqwest_tracing::{SpanBackendWithUrl, TracingMiddleware};
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/// Returns a new tracing middleware which can be used with reqwest_middleware.
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/// It will then write the `traceparent` in the header on the request and additionally records the
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/// `url` into `http.url`.
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///
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/// If otlp feature is disabled, this will not insert a `traceparent` into the header. It will
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/// basically function as a noop.
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///
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/// `traceparent` => https://www.w3.org/TR/trace-context/#trace-context-http-headers-format
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pub fn tracing_middleware() -> TracingMiddleware<SpanBackendWithUrl> {
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TracingMiddleware::<SpanBackendWithUrl>::new()
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}
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