From 3e8a7979df37e8a8b94e080e2145619aa90c6d03 Mon Sep 17 00:00:00 2001
From: Gajus Kuizinas <gajus@gajus.com>
Date: Mon, 27 Feb 2017 17:20:12 +0000
Subject: [PATCH] feat: ensure that the host does not include the port when
 unnecessary

---
 src/index.js | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/index.js b/src/index.js
index 21697ed..989fa05 100644
--- a/src/index.js
+++ b/src/index.js
@@ -2,6 +2,9 @@
 
 /* eslint-disable no-process-env */
 
+import {
+  parse as parseUrl
+} from 'url';
 import fetch, {
   Headers,
   Request,
@@ -38,6 +41,18 @@ export default async (url: string, userConfiguration: ConfigurationType = {}) =>
     configuration.agent = new HttpsProxyAgent(process.env.HTTP_PROXY);
   }
 
+  const urlTokens = parseUrl(url);
+
+  if (!urlTokens.hostname) {
+    throw new Error('Invalid URL.');
+  }
+
+  const host = urlTokens.port === 80 ? urlTokens.host : urlTokens.hostname;
+
+  configuration.headers = configuration.headers || {};
+
+  configuration.headers.host = host;
+
   return attemptRequest(() => {
     return fetch(url, configuration);
   }, configuration.validateResponse || validateResponse, configuration.retry);