From e9fd0b821489490f5057fb2a4e74af5d7c22b12c Mon Sep 17 00:00:00 2001
From: lucaswadedavis <luke@patreon.com>
Date: Mon, 19 Dec 2016 15:43:48 -0800
Subject: [PATCH] Add cache-control headers.

---
 server.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/server.js b/server.js
index 94be89d..ef04a9f 100644
--- a/server.js
+++ b/server.js
@@ -41,11 +41,14 @@ var app = express();
 
 app.use(express.static(__dirname + '/images'));
 
+var cacheTimeout = 60 * 60 * 24 * 30;
+
 app.get('/', function(req, res) {
     var width = 400;
     var seed = uuid();
     var canvas = composeImage(width, width, seed);
     var buffer = canvas.toBuffer();
+    res.set('Cache-Control', 'max-age=' + cacheTimeout);
     res.set('Content-length', buffer.length);
     res.type('png');
     res.end(buffer, 'binary');
@@ -56,6 +59,7 @@ app.get('/:width', function(req, res) {
     var seed = uuid();
     var canvas = composeImage(width, width, seed);
     var buffer = canvas.toBuffer();
+    res.set('Cache-Control', 'max-age=' + cacheTimeout);
     res.set('Content-length', buffer.length);
     res.type('png');
     res.end(buffer, 'binary');
@@ -66,6 +70,7 @@ app.get('/:width/:seed', function(req, res) {
     var seed = sanitize(req.params.seed) || uuid();
     var canvas = composeImage(width, width, seed);
     var buffer = canvas.toBuffer();
+    res.set('Cache-Control', 'max-age=' + cacheTimeout);
     res.set('Content-length', buffer.length);
     res.type('png');
     res.end(buffer, 'binary');