From f451a2c3a3353de74afc997b937517731f914db1 Mon Sep 17 00:00:00 2001
From: Ben Hsieh <xeiyan@gmail.com>
Date: Mon, 20 Mar 2017 17:57:39 +0800
Subject: [PATCH] Fix incorrect header type #290

---
 index.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index ae240496e..0f68fa2e1 100644
--- a/index.js
+++ b/index.js
@@ -220,7 +220,10 @@ function fetch(...args:any):Promise {
 
   // # 241 normalize null or undefined headers, in case nil or null string
   // pass to native context
-  headers = _.map(headers, (h) => h || '' );
+  headers = _.reduce(headers, (result, value, key) => {
+    result[key] = value || ''
+    return result
+  }, {});
 
   // fetch from file system
   if(URIUtil.isFileURI(url)) {