fix(opentelemetry-instrumentation-fetch): fixed override of headers

Signed-off-by: Philip Szalla <philip@szalla.de>
open-telemetry · Aug 23, 2021 · c6274ef · c6274ef
1 parent 0ef1fc2
commit c6274ef
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/packages/opentelemetry-instrumentation-fetch/src/fetch.ts b/packages/opentelemetry-instrumentation-fetch/src/fetch.ts
@@ -158,6 +158,11 @@ export class FetchInstrumentation extends InstrumentationBase<
       api.propagation.inject(api.context.active(), options.headers, {
         set: (h, k, v) => h.set(k, typeof v === 'string' ? v : String(v)),
       });
+    } else if(options.headers instanceof Headers) {
+      // ||-operator causes ts type error
+      api.propagation.inject(api.context.active(), options.headers, {
+        set: (h, k, v) => h.set(k, typeof v === 'string' ? v : String(v)),
+      });
     } else {
       const headers: Partial<Record<string, unknown>> = {};
       api.propagation.inject(api.context.active(), headers);