Add caching (2 hours by default)

README.md

@@ -4,7 +4,8 @@
 
 A simple node.js server for Squirrel.Mac and Squirrel.Windows which uses GitHub releases. It also has an endpoint for Linux.
 
-The server doesn't do any caching, and its responses don't include caching headers. Use a service like CloudFlare to cache requests and minimise load.
+> The server doesn't do any caching, and its responses don't include caching headers. Use a service like CloudFlare to cache requests and minimise load.
+> CHANGED: From v0.6, I added server-side caching.
 
 > Make sure you tag your releases as `vX.X.X` and not just `X.X.X`.
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "squirrel-updates-server",
-  "version": "0.5.3",
+  "version": "0.6.0",
   "description": "A simple node.js server for Squirrel.Mac and Squirrel.Windows which uses GitHub releases.",
   "private": true,
   "main": "index.js",
@@ -29,6 +29,7 @@
   },
   "homepage": "https://github.com/Aluxian/squirrel-updates-server#readme",
   "dependencies": {
+    "apicache": "0.8.3",
     "babel-cli": "6.7.7",
     "babel-plugin-array-includes": "2.0.3",
     "babel-plugin-transform-es2015-classes": "6.7.7",

src/config.js

@@ -43,5 +43,6 @@ export default {
   defaultChannel: 'stable',
   downloadsCountOffset: parseInt(process.env.DOWNLOADS_COUNT_OFFSET || '0') || 0,
   excludeDrafts: JSON.parse(process.env.EXCLUDE_DRAFTS || 'true'),
-  excludePrereleases: JSON.parse(process.env.EXCLUDE_PRERELEASES || 'false')
+  excludePrereleases: JSON.parse(process.env.EXCLUDE_PRERELEASES || 'false'),
+  cacheTTL: '2 hours'
 };

src/server.js

@@ -1,4 +1,5 @@
 import express from 'express';
+import apicache from 'apicache';
 import morgan from 'morgan';
 import raven from 'raven';
 
@@ -27,19 +28,23 @@ if (ravenClient) {
   app.use(raven.middleware.express.requestHandler(ravenClient));
 }
 
-app.get('/', asyncHandler(homeCtrl.main));
-app.get('/update/darwin', asyncHandler(updateCtrl.darwin));
-app.get('/update/win32/portable', asyncHandler(updateCtrl.win32_portable));
-app.get('/update/win32/:file', asyncHandler(updateCtrl.win32_file));
-app.get('/update/linux', asyncHandler(updateCtrl.linux));
-app.get('/update/:channel/darwin', asyncHandler(updateCtrl.darwin));
-app.get('/update/:channel/win32/portable', asyncHandler(updateCtrl.win32_portable));
-app.get('/update/:channel/win32/:file', asyncHandler(updateCtrl.win32_file));
-app.get('/update/:channel/linux', asyncHandler(updateCtrl.linux));
+const cache = () => {
+  return apicache.middleware(config.cacheTTL);
+};
+
+app.get('/', cache(), asyncHandler(homeCtrl.main));
+app.get('/update/darwin', cache(), asyncHandler(updateCtrl.darwin));
+app.get('/update/win32/portable', cache(), asyncHandler(updateCtrl.win32_portable));
+app.get('/update/win32/:file', cache(), asyncHandler(updateCtrl.win32_file));
+app.get('/update/linux', cache(), asyncHandler(updateCtrl.linux));
+app.get('/update/:channel/darwin', cache(), asyncHandler(updateCtrl.darwin));
+app.get('/update/:channel/win32/portable', cache(), asyncHandler(updateCtrl.win32_portable));
+app.get('/update/:channel/win32/:file', cache(), asyncHandler(updateCtrl.win32_file));
+app.get('/update/:channel/linux', cache(), asyncHandler(updateCtrl.linux));
 app.get('/download/mirror/:mirror/latest', asyncHandler(downloadCtrl.latestMirror));
-app.get('/download/:platform/latest', asyncHandler(downloadCtrl.latest));
-app.get('/stats', asyncHandler(statsCtrl.main));
-app.get('/badge/:type.svg', asyncHandler(badgeCtrl.main));
+app.get('/download/:platform/latest', cache(), asyncHandler(downloadCtrl.latest));
+app.get('/stats', cache(), asyncHandler(statsCtrl.main));
+app.get('/badge/:type.svg', cache(), asyncHandler(badgeCtrl.main));
 
 app.use(errorHandler1);
 if (ravenClient) {