From 86a7bd21eb4ff594498cdcbceb7af8a4af6a114c Mon Sep 17 00:00:00 2001
From: Matt Dunn-Rankin <mattdunnrankin@khanacademy.org>
Date: Thu, 30 Apr 2020 00:13:35 -0700
Subject: [PATCH] cache proxied images for 1 day

---
 api/assetProxy.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/api/assetProxy.js b/api/assetProxy.js
index 21a33f6..d2ba266 100644
--- a/api/assetProxy.js
+++ b/api/assetProxy.js
@@ -33,5 +33,8 @@ export default async (req, res) => {
   );
 
   res.status(proxyRes.status);
+  if (proxyRes.ok) {
+    res.setHeader("Cache-Control", "public, max-age=86400"); // 1 day
+  }
   streamPipeline(proxyRes.body, res);
 };