From c1721e08918aa9a0fb538ecdcdab6e16c3adc548 Mon Sep 17 00:00:00 2001
From: nicolasvienot <nvienot@gmail.com>
Date: Thu, 27 Jun 2024 12:00:10 +0200
Subject: [PATCH] fix: corsify issue "can't modify immutable headers"

---
 src/cors.ts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/cors.ts b/src/cors.ts
index 9b08608..9f6a2dd 100644
--- a/src/cors.ts
+++ b/src/cors.ts
@@ -78,7 +78,13 @@ export const cors = (options: CorsOptions = {}) => {
       || response.status == 101
     ) return response
 
-    return appendHeadersAndReturn(response.clone(), {
+    const responseCopy = new Response(response.body, {
+      status: response.status,
+      statusText: response.statusText,
+      headers: response.headers,
+    })
+
+    return appendHeadersAndReturn(responseCopy, {
       'access-control-allow-origin': getAccessControlOrigin(request),
       'access-control-allow-credentials': credentials,
     })