Support OpenTelemetry 0.31

.github/workflows/ci.yml

@@ -69,7 +69,7 @@ jobs:
         uses: taiki-e/install-action@cargo-hack
       # Old opentelemetry features group to improve performance
       - name: test
-        run: cargo hack test --feature-powerset -p reqwest-tracing --exclude-features opentelemetry_0_20 --group-features opentelemetry_0_21,opentelemetry_0_22,opentelemetry_0_23,opentelemetry_0_24,opentelemetry_0_25,opentelemetry_0_26,opentelemetry_0_27
+        run: cargo hack test --feature-powerset -p reqwest-tracing --exclude-features opentelemetry_0_20,opentelemetry_0_21 --group-features opentelemetry_0_22,opentelemetry_0_23,opentelemetry_0_24,opentelemetry_0_25,opentelemetry_0_26,opentelemetry_0_27,opentelemetry_0_28
 
   rustfmt:
     name: Rustfmt

reqwest-tracing/CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Added
+- Added support for OpenTelemetry `0.31`
 
 ## [0.6.0] - 2026-01-07
 

reqwest-tracing/Cargo.toml

@@ -21,6 +21,7 @@ opentelemetry_0_27 = ["opentelemetry_0_27_pkg", "tracing-opentelemetry_0_28_pkg"
 opentelemetry_0_28 = ["opentelemetry_0_28_pkg", "tracing-opentelemetry_0_29_pkg"]
 opentelemetry_0_29 = ["opentelemetry_0_29_pkg", "tracing-opentelemetry_0_30_pkg"]
 opentelemetry_0_30 = ["opentelemetry_0_30_pkg", "tracing-opentelemetry_0_31_pkg"]
+opentelemetry_0_31 = ["opentelemetry_0_31_pkg", "tracing-opentelemetry_0_32_pkg"]
 # This feature ensures that both the old (deprecated) and new attributes are published simultaneously.
 # By doing so, we maintain backward compatibility, allowing existing code that relies on the old attributes
 # to continue functioning while encouraging the transition to the new attributes.
@@ -47,6 +48,7 @@ opentelemetry_0_27_pkg = { package = "opentelemetry", version = "0.27.0", option
 opentelemetry_0_28_pkg = { package = "opentelemetry", version = "0.28.0", optional = true }
 opentelemetry_0_29_pkg = { package = "opentelemetry", version = "0.29.0", optional = true }
 opentelemetry_0_30_pkg = { package = "opentelemetry", version = "0.30.0", optional = true }
+opentelemetry_0_31_pkg = { package = "opentelemetry", version = "0.31.0", optional = true }
 tracing-opentelemetry_0_21_pkg = { package = "tracing-opentelemetry", version = "0.21.0", optional = true }
 tracing-opentelemetry_0_22_pkg = { package = "tracing-opentelemetry", version = "0.22.0", optional = true }
 tracing-opentelemetry_0_23_pkg = { package = "tracing-opentelemetry", version = "0.23.0", optional = true }
@@ -58,6 +60,7 @@ tracing-opentelemetry_0_28_pkg = { package = "tracing-opentelemetry", version =
 tracing-opentelemetry_0_29_pkg = { package = "tracing-opentelemetry", version = "0.29.0", optional = true }
 tracing-opentelemetry_0_30_pkg = { package = "tracing-opentelemetry", version = "0.30.0", optional = true }
 tracing-opentelemetry_0_31_pkg = { package = "tracing-opentelemetry", version = "0.31.0", optional = true }
+tracing-opentelemetry_0_32_pkg = { package = "tracing-opentelemetry", version = "0.32.1", optional = true }
 
 [target.'cfg(target_arch = "wasm32")'.dependencies]
 getrandom = { version = "0.2.0", features = ["js"] }
@@ -78,8 +81,10 @@ opentelemetry_sdk_0_27 = { package = "opentelemetry_sdk", version = "0.27.0", fe
 opentelemetry_sdk_0_28 = { package = "opentelemetry_sdk", version = "0.28.0", features = ["trace"] }
 opentelemetry_sdk_0_29 = { package = "opentelemetry_sdk", version = "0.29.0", features = ["trace"] }
 opentelemetry_sdk_0_30 = { package = "opentelemetry_sdk", version = "0.30.0", features = ["trace"] }
+opentelemetry_sdk_0_31 = { package = "opentelemetry_sdk", version = "0.31.0", features = ["trace"] }
 opentelemetry_stdout_0_1 = { package = "opentelemetry-stdout", version = "0.1.0", features = ["trace"] }
 opentelemetry_stdout_0_2 = { package = "opentelemetry-stdout", version = "0.2.0", features = ["trace"] }
 opentelemetry_stdout_0_3 = { package = "opentelemetry-stdout", version = "0.3.0", features = ["trace"] }
 opentelemetry_stdout_0_4 = { package = "opentelemetry-stdout", version = "0.4.0", features = ["trace"] }
 opentelemetry_stdout_0_5 = { package = "opentelemetry-stdout", version = "0.5.0", features = ["trace"] }
+opentelemetry_stdout_0_31 = { package = "opentelemetry-stdout", version = "0.31.0", features = ["trace"] }

reqwest-tracing/src/lib.rs

@@ -95,6 +95,7 @@ mod middleware;
     feature = "opentelemetry_0_28",
     feature = "opentelemetry_0_29",
     feature = "opentelemetry_0_30",
+    feature = "opentelemetry_0_31",
 ))]
 mod otel;
 mod reqwest_otel_span_builder;

reqwest-tracing/src/middleware.rs

@@ -57,6 +57,7 @@ where
                 feature = "opentelemetry_0_28",
                 feature = "opentelemetry_0_29",
                 feature = "opentelemetry_0_30",
+                feature = "opentelemetry_0_31",
             ))]
             let req = if extensions.get::<crate::DisableOtelPropagation>().is_none() {
                 // Adds tracing headers to the given request to propagate the OpenTelemetry context to downstream revivers of the request.

reqwest-tracing/src/otel.rs

@@ -82,6 +82,13 @@ pub fn inject_opentelemetry_context_into_request(mut request: Request) -> Reques
         injector.inject_context(&context, &mut RequestCarrier::new(&mut request))
     });
 
+    #[cfg(feature = "opentelemetry_0_31")]
+    opentelemetry_0_31_pkg::global::get_text_map_propagator(|injector| {
+        use tracing_opentelemetry_0_32_pkg::OpenTelemetrySpanExt;
+        let context = Span::current().context();
+        injector.inject_context(&context, &mut RequestCarrier::new(&mut request))
+    });
+
     request
 }
 
@@ -186,6 +193,13 @@ impl opentelemetry_0_30_pkg::propagation::Injector for RequestCarrier<'_> {
     }
 }
 
+#[cfg(feature = "opentelemetry_0_31")]
+impl opentelemetry_0_31_pkg::propagation::Injector for RequestCarrier<'_> {
+    fn set(&mut self, key: &str, value: String) {
+        self.set_inner(key, value)
+    }
+}
+
 #[cfg(test)]
 mod test {
     use std::sync::OnceLock;
@@ -417,6 +431,22 @@ mod test {
                 subscriber.with(telemetry)
             };
 
+            #[cfg(feature = "opentelemetry_0_31")]
+            let subscriber = {
+                use opentelemetry_0_31_pkg::trace::TracerProvider;
+
+                let provider = opentelemetry_sdk_0_31::trace::SdkTracerProvider::builder().build();
+
+                let tracer = provider.tracer("reqwest");
+                opentelemetry_0_31_pkg::global::set_tracer_provider(provider);
+                opentelemetry_0_31_pkg::global::set_text_map_propagator(
+                    opentelemetry_sdk_0_31::propagation::TraceContextPropagator::new(),
+                );
+
+                let telemetry = tracing_opentelemetry_0_32_pkg::layer().with_tracer(tracer);
+                subscriber.with(telemetry)
+            };
+
             tracing::subscriber::set_global_default(subscriber).unwrap();
         });