From 657963cf67b28567986667960df08be46a32aa91 Mon Sep 17 00:00:00 2001
From: Andrey Melikhov <melikhov@yandex-team.ru>
Date: Tue, 21 Oct 2025 13:33:52 +0300
Subject: [PATCH] Remove x-dl headers for the external sources

---
 .../charts-engine/components/processor/data-fetcher.ts         | 3 +++
 src/server/components/charts-engine/types.ts                   | 1 +
 2 files changed, 4 insertions(+)

diff --git a/src/server/components/charts-engine/components/processor/data-fetcher.ts b/src/server/components/charts-engine/components/processor/data-fetcher.ts
index 885ddb12c8..9f06b3e714 100644
--- a/src/server/components/charts-engine/components/processor/data-fetcher.ts
+++ b/src/server/components/charts-engine/components/processor/data-fetcher.ts
@@ -738,6 +738,9 @@ export class DataFetcher {
         ];
         if (Array.isArray(proxyHeaders)) {
             proxyHeaders.forEach((headerName) => {
+                if (sourceConfig.isExternal && headerName.toLowerCase().startsWith('x-dl')) {
+                    return;
+                }
                 if (subrequestHeaders[headerName]) {
                     headers[headerName] = subrequestHeaders[headerName];
                 }
diff --git a/src/server/components/charts-engine/types.ts b/src/server/components/charts-engine/types.ts
index 64af9f73f1..b2824b9a7d 100644
--- a/src/server/components/charts-engine/types.ts
+++ b/src/server/components/charts-engine/types.ts
@@ -200,6 +200,7 @@ export type SourceConfig = {
 
     args?: Record<string, string | number | (string | number)[]>;
     maxRedirects?: number;
+    isExternal?: boolean;
 };
 
 export enum MiddlewareStage {