From ad46d2e1aea53fb4f838cdb24fc1a8b85ea5232f Mon Sep 17 00:00:00 2001
From: Murtaza Aliakbar <murtaza@live.in>
Date: Fri, 27 Sep 2024 07:08:12 +0530
Subject: [PATCH] core/io: add block flag headers iff non-empty

---
 src/core/io-state.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/core/io-state.js b/src/core/io-state.js
index 45d3ac822b..56199b020a 100644
--- a/src/core/io-state.js
+++ b/src/core/io-state.js
@@ -182,8 +182,11 @@ export default class IOState {
   }
 
   headers(b = null) {
-    const xNileFlags = this.isDnsBlock ? { "x-nile-flags": this.flag } : null;
-    const xNileFlagsOk = !xNileFlags ? { "x-nile-flags-dn": this.flag } : null;
+    const hasBlockFlag = !util.emptyString(this.flag);
+    const isBlocked = hasBlockFlag && this.isDnsBlock;
+    const couldBlock = hasBlockFlag && !this.isDnsBlock;
+    const xNileFlags = isBlocked ? { "x-nile-flags": this.flag } : null;
+    const xNileFlagsOk = couldBlock ? { "x-nile-flags-dn": this.flag } : null;
     const xNileRegion = !util.emptyString(this.region)
       ? { "x-nile-region": this.region }
       : null;