From 750292255c1366e11649ced07962115b82a76541 Mon Sep 17 00:00:00 2001
From: Seungwan Seo <wan9824@naver.com>
Date: Thu, 23 Sep 2021 18:16:40 +0900
Subject: [PATCH] fix: bug when empty event headers (#462)

Due to in several express.js libraries treats req.headers as NonNullable Object,
when event headers is null causing bugs.

When incoming headers from API Gateway is null, it should transform to {}.

Fix #462
---
 src/event-sources/utils.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/event-sources/utils.js b/src/event-sources/utils.js
index 5db4ecbd..46c99b5a 100644
--- a/src/event-sources/utils.js
+++ b/src/event-sources/utils.js
@@ -32,7 +32,7 @@ function getRequestValuesFromEvent ({
 
   if (event.multiValueHeaders) {
     headers = getCommaDelimitedHeaders({ headersMap: event.multiValueHeaders, lowerCaseKey: true })
-  } else {
+  } else if (event.headers) {
     headers = event.headers
   }