From 811a3d3fce81ca9e22deb3ac21ca31d99037f1ef Mon Sep 17 00:00:00 2001
From: Andrey Ivliev <as.is.ivliev@gmail.com>
Date: Wed, 17 Feb 2021 16:22:01 +0300
Subject: [PATCH] Skip no string forward headers

---
 src/proxy.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/proxy.ts b/src/proxy.ts
index 77552557..18ff0424 100644
--- a/src/proxy.ts
+++ b/src/proxy.ts
@@ -22,7 +22,11 @@ export function getProxyExecuteFn(url, headers, forwardHeaders) {
     const request = contextValue as IncomingMessage;
     const proxyHeaders = Object.create(null);
     for (const name of forwardHeaders) {
-      proxyHeaders[name] = request.headers[name];
+      const incomingHeader = request.headers[name];
+
+      if (typeof incomingHeader === 'string' && incomingHeader.length > 0) {
+        proxyHeaders[name] = request.headers[name];
+      }
     }
 
     const strippedAST = removeUnusedVariables(