Recursively collect delegate headers to include in fetch request

hotwired · Jan 15, 2021 · f3d413a · f3d413a
1 parent 178c817
commit f3d413a
Showing 1 changed file with 7 additions and 4 deletions.
diff --git a/src/http/fetch_request.ts b/src/http/fetch_request.ts
@@ -130,11 +130,14 @@ export class FetchRequest {
   }
 
   get additionalHeaders() {
-    if (typeof this.delegate.additionalHeadersForRequest == "function") {
-      return this.delegate.additionalHeadersForRequest(this)
-    } else {
-      return {}
+    let headers = {};
+    let rootDelegate:any = this;
+    while(rootDelegate = rootDelegate.delegate) {
+      if (typeof rootDelegate.additionalHeadersForRequest == "function") {
+        headers = Object.assign(rootDelegate.additionalHeadersForRequest(this), headers);
+      }
     }
+    return headers;
   }
 
   get abortSignal() {