From fb3cf1d0e1d2bc9cedf94f0a2e2896d6388ea675 Mon Sep 17 00:00:00 2001
From: Pooya Parsa <pooya@pi0.io>
Date: Wed, 18 Oct 2023 00:43:44 +0200
Subject: [PATCH] fix(server): append `vary` header instead of overriding it

---
 src/server.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/server.ts b/src/server.ts
index 95decd1..47e7b65 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -14,6 +14,7 @@ import {
   H3Event,
   H3Error,
   send,
+  appendResponseHeader,
 } from "h3";
 import { IPX } from "./ipx";
 
@@ -70,7 +71,7 @@ export function createIPXH3Handler(ipx: IPX) {
       delete modifiers.format;
       if (autoFormat) {
         modifiers.format = autoFormat;
-        setResponseHeader(event, "vary", "Accept");
+        appendResponseHeader(event, "vary", "Accept");
       }
     }