From a125882f4cdc0d9028c64ef5d157b0eb0452eff9 Mon Sep 17 00:00:00 2001
From: bozzelliandrea <bozzelliandrea@yahoo.it>
Date: Fri, 29 Nov 2024 15:49:19 +0100
Subject: [PATCH] feat: add support to dynamic header on legacy config

---
 .../src/configuration/legacy-base-configuration.ts          | 2 +-
 .../src/configuration/shared-configuration.ts               | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/experimental/packages/otlp-exporter-base/src/configuration/legacy-base-configuration.ts b/experimental/packages/otlp-exporter-base/src/configuration/legacy-base-configuration.ts
index 8a36b267ddf..d00385bedef 100644
--- a/experimental/packages/otlp-exporter-base/src/configuration/legacy-base-configuration.ts
+++ b/experimental/packages/otlp-exporter-base/src/configuration/legacy-base-configuration.ts
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 export interface OTLPExporterConfigBase {
-  headers?: Record<string, string>;
+  headers?: Record<string, string> | (() => Record<string, string>);
   url?: string;
   concurrencyLimit?: number;
   /** Maximum time the OTLP exporter will wait for each batch export.
diff --git a/experimental/packages/otlp-exporter-base/src/configuration/shared-configuration.ts b/experimental/packages/otlp-exporter-base/src/configuration/shared-configuration.ts
index d9d589e3699..9cfbf942560 100644
--- a/experimental/packages/otlp-exporter-base/src/configuration/shared-configuration.ts
+++ b/experimental/packages/otlp-exporter-base/src/configuration/shared-configuration.ts
@@ -42,12 +42,16 @@ export function validateTimeoutMillis(timeoutMillis: number) {
 }
 
 export function wrapStaticHeadersInFunction(
-  headers: Record<string, string> | undefined
+  headers: Record<string, string> | (() => Record<string, string>) | undefined
 ): (() => Record<string, string>) | undefined {
   if (headers == null) {
     return undefined;
   }
 
+  if (headers instanceof Function) {
+    return headers;
+  }
+
   return () => headers;
 }