From d93a6e893881254b5aa7a973b2c12f27ffb9bc64 Mon Sep 17 00:00:00 2001
From: Daniel Levi-Minzi <51272568+dleviminzi@users.noreply.github.com>
Date: Thu, 19 Dec 2024 12:18:23 -0500
Subject: [PATCH] Fix: Write response headers from copy of internal response's
 headers (#797)

---
 pkg/abstractions/endpoint/buffer.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/pkg/abstractions/endpoint/buffer.go b/pkg/abstractions/endpoint/buffer.go
index 4a443b8b5..9bb9311ef 100644
--- a/pkg/abstractions/endpoint/buffer.go
+++ b/pkg/abstractions/endpoint/buffer.go
@@ -468,8 +468,15 @@ func (rb *RequestBuffer) handleHttpRequest(req *request, c container) {
 
 	defer resp.Body.Close()
 
-	// Write response headers
+	responseHeaders := make(http.Header)
 	for key, values := range resp.Header {
+		for _, value := range values {
+			responseHeaders.Add(key, value)
+		}
+	}
+
+	// Write response headers
+	for key, values := range responseHeaders {
 		for _, value := range values {
 			req.ctx.Response().Writer.Header().Add(key, value)
 		}