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homebrewery/server/static-assets.mv.js
Alexey Sachkov 7057422077 Enable caching of static assets (#1217)
* Enable caching of static assets

* Remove dependency on mime package

Since we only care about two file extensions at the moment,
there is no need to grab the whole package just to avoid
calling 'endsWith' twice.
2021-02-19 17:58:02 -05:00

32 lines
1.1 KiB
JavaScript

const expressStaticGzip = require('express-static-gzip');
// Serve brotli-compressed static files if available
const customCacheControlHandler=(response, path)=>{
if(path.endsWith('.br')) {
// Drop .br suffix to help mime understand the actual type of the file
path = path.slice(0, -3);
}
if(path.endsWith('.js') || path.endsWith('.css')) {
// .js and .css files are allowed to be cached up to 12 hours, but then
// they must be revalidated to see if there are any updates
response.setHeader('Cache-Control', 'public, max-age: 43200, must-revalidate');
} else {
// Everything else is cached up to a months as we don't update our images
// or fonts frequently
response.setHeader('Cache-Control', 'public, max-age=2592000, must-revalidate');
}
};
const init=(pathToAssets)=>{
return expressStaticGzip(pathToAssets, {
enableBrotli : true,
orderPreference : ['br'],
index : false,
serveStatic : {
cacheControl : false, // we are going to use custom cache-control
setHeaders : customCacheControlHandler
} });
};
module.exports = init;