From 56e8ed5eb1a6f2880c96fc8f08e35a6dd83aad8b Mon Sep 17 00:00:00 2001
From: Luca Casonato <hello@lcas.dev>
Date: Mon, 12 Aug 2024 12:01:37 +0200
Subject: fix(ext/node): don't concat set-cookie in ServerResponse.appendHeader
 (#25000)

Follow-on to
https://github.com/denoland/deno/pull/24216/files#r1642188672
---
 ext/node/polyfills/http.ts | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

(limited to 'ext/node')

diff --git a/ext/node/polyfills/http.ts b/ext/node/polyfills/http.ts
index e0ddedef8..575c6517e 100644
--- a/ext/node/polyfills/http.ts
+++ b/ext/node/polyfills/http.ts
@@ -1439,12 +1439,11 @@ export class ServerResponse extends NodeWritable {
   }
 
   appendHeader(name: string, value: string | string[]) {
-    if (Array.isArray(value)) {
-      this.#hasNonStringHeaders = true;
-    }
     if (this.#headers[name] === undefined) {
+      if (Array.isArray(value)) this.#hasNonStringHeaders = true;
       this.#headers[name] = value;
     } else {
+      this.#hasNonStringHeaders = true;
       if (!Array.isArray(this.#headers[name])) {
         this.#headers[name] = [this.#headers[name]];
       }
-- 
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