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⚙️ refactor: brotli asset serving behind a feature toggle (#13641)

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Ravi Kumar L 2026-06-10 08:49:50 -04:00 • committed by GitHub
parent db863e75e3
commit 346ebea2d9
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3 changed files with 66 additions and 4 deletions
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59
api/server/utils/__tests__/staticCache.spec.js
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@ -5,6 +5,12 @@ const request = require('supertest');
const zlib = require('zlib');
const staticCache = require('../staticCache');
const binaryParser = (res, callback) => {
const chunks = [];
res.on('data', (chunk) => chunks.push(chunk));
res.on('end', () => callback(null, Buffer.concat(chunks)));
};
describe('staticCache', () => {
let app;
let testDir;
@ -36,10 +42,15 @@ describe('staticCache', () => {
fs.writeFileSync(manifestFile, jsonContent);
fs.writeFileSync(swFile, swContent);
// Create gzipped versions of some files
// Create precompressed versions of some files
fs.writeFileSync(testFile + '.gz', zlib.gzipSync(jsContent));
fs.writeFileSync(testFile + '.br', zlib.brotliCompressSync(jsContent));
fs.writeFileSync(path.join(testDir, 'test.css'), 'body { color: red; }');
fs.writeFileSync(path.join(testDir, 'test.css.gz'), zlib.gzipSync('body { color: red; }'));
fs.writeFileSync(
path.join(testDir, 'test.css.br'),
zlib.brotliCompressSync('body { color: red; }'),
);
// Create a file that only exists in gzipped form
fs.writeFileSync(
@ -67,6 +78,7 @@ describe('staticCache', () => {
delete process.env.NODE_ENV;
delete process.env.STATIC_CACHE_S_MAX_AGE;
delete process.env.STATIC_CACHE_MAX_AGE;
delete process.env.ENABLE_STATIC_ASSET_BROTLI;
});
describe('cache headers in production', () => {
beforeEach(() => {
@ -193,6 +205,51 @@ describe('staticCache', () => {
process.env.NODE_ENV = 'production';
});
it('should serve Brotli files when client accepts Brotli encoding', async () => {
process.env.ENABLE_STATIC_ASSET_BROTLI = 'true';
app.use(staticCache(testDir, { skipGzipScan: false }));
const response = await request(app)
.get('/test.js')
.set('Accept-Encoding', 'br, gzip, deflate')
.buffer(true)
.parse(binaryParser)
.expect(200);
expect(response.headers['content-encoding']).toBe('br');
expect(response.headers['content-type']).toMatch(/javascript/);
expect(response.headers['cache-control']).toBe('public, max-age=172800, s-maxage=86400');
expect(zlib.brotliDecompressSync(response.body).toString()).toBe('console.log("test");');
});
it('should prefer Brotli over gzip when both encodings are accepted', async () => {
process.env.ENABLE_STATIC_ASSET_BROTLI = 'true';
app.use(staticCache(testDir, { skipGzipScan: false }));
const response = await request(app)
.get('/test.css')
.set('Accept-Encoding', 'gzip, br')
.buffer(true)
.parse(binaryParser)
.expect(200);
expect(response.headers['content-encoding']).toBe('br');
expect(response.headers['content-type']).toMatch(/css/);
expect(zlib.brotliDecompressSync(response.body).toString()).toBe('body { color: red; }');
});
it('should keep serving gzip when Brotli is not enabled', async () => {
app.use(staticCache(testDir, { skipGzipScan: false }));
const response = await request(app)
.get('/test.js')
.set('Accept-Encoding', 'br, gzip, deflate')
.expect(200);
expect(response.headers['content-encoding']).toBe('gzip');
expect(response.text).toBe('console.log("test");');
});
it('should serve gzipped files when client accepts gzip encoding', async () => {
app.use(staticCache(testDir, { skipGzipScan: false }));