From 8ef71228116a09788c254e6c0032a94bb1453ac7 Mon Sep 17 00:00:00 2001
From: Romein van Buren <romein@vburen.nl>
Date: Fri, 15 Jul 2022 17:28:30 +0200
Subject: [PATCH] Force requests over IPv4

---
 lib/testendpoints.js | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/lib/testendpoints.js b/lib/testendpoints.js
index 4cf6961..2b13f6e 100644
--- a/lib/testendpoints.js
+++ b/lib/testendpoints.js
@@ -3,6 +3,12 @@
 const fetch = require('node-fetch');
 const { operators } = require('./operators');
 const { realValues } = require('./realvalues');
+const http = require('http');
+const https = require('https');
+
+// Force requests over IPv4
+const httpAgent = new http.Agent({ family: 4 });
+const httpsAgent = new https.Agent({ family: 4 });
 
 async function testEndpoints(endpoints) {
   const output = {
@@ -20,7 +26,15 @@ async function testEndpoints(endpoints) {
         return obj;
       }, {});
 
-      const res = await fetch(endpoint.uri, { headers });
+      const res = await fetch(endpoint.uri, {
+        headers,
+        agent: url => {
+          if (url.protocol === 'http:') {
+            return httpAgent;
+          }
+          return httpsAgent;
+        },
+      });
       const body = await res.text();
 
       endpoint.requirements.forEach(requirement => {