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* 🛟 fix: Auto-Recover from Stale Service Worker Assets After Deploys - 404 missing static assets in the SPA fallback instead of serving index.html - inline recovery script unregisters stale SWs and reloads once on chunk failure - route vite:preloadError into the same recovery path for stale lazy chunks * 🛟 fix: Address Review — SW-Side Recovery, Scoped Unregister, Shared Fallback - importScripts'd sw-heal.js pings window clients on activation and reloads ones that can't pong: stale pages carry no recovery code of their own - scope SW unregistration to the deployment base for subpath installs - preventDefault vite:preloadError only when a recovery reload was initiated - extract createSpaFallback and apply the asset 404 guard to experimental.js
65 lines
2.2 KiB
JavaScript
65 lines
2.2 KiB
JavaScript
const path = require('path');
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const express = require('express');
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const expressStaticGzip = require('express-static-gzip');
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const oneDayInSeconds = 24 * 60 * 60;
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const sMaxAge = process.env.STATIC_CACHE_S_MAX_AGE || oneDayInSeconds;
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const maxAge = process.env.STATIC_CACHE_MAX_AGE || oneDayInSeconds * 2;
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const isEnabled = (value) => value === true || String(value).toLowerCase() === 'true';
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/**
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* Creates an Express static middleware with optional precompressed asset serving and configurable caching
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*
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* @param {string} staticPath - The file system path to serve static files from
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* @param {Object} [options={}] - Configuration options
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* @param {boolean} [options.noCache=false] - If true, disables caching entirely for all files
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* @param {boolean} [options.skipGzipScan=false] - If true, skips expressStaticGzip middleware
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* @returns {ReturnType<expressStaticGzip>|ReturnType<express.static>} Express middleware function for serving static files
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*/
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function staticCache(staticPath, options = {}) {
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const { noCache = false, skipGzipScan = false } = options;
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const enableBrotli = isEnabled(process.env.ENABLE_STATIC_ASSET_BROTLI);
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const setHeaders = (res, filePath) => {
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if (process.env.NODE_ENV?.toLowerCase() !== 'production') {
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return;
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}
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if (noCache) {
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res.setHeader('Cache-Control', 'no-store, no-cache, must-revalidate');
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return;
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}
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if (filePath && filePath.includes('/dist/images/')) {
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return;
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}
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const fileName = filePath ? path.basename(filePath) : '';
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if (
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fileName === 'index.html' ||
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fileName.endsWith('.webmanifest') ||
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fileName === 'manifest.json' ||
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fileName === 'sw.js' ||
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fileName === 'sw-heal.js'
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) {
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res.setHeader('Cache-Control', 'no-store, no-cache, must-revalidate');
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} else {
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res.setHeader('Cache-Control', `public, max-age=${maxAge}, s-maxage=${sMaxAge}`);
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}
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};
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if (skipGzipScan) {
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return express.static(staticPath, {
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setHeaders,
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index: false,
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});
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} else {
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return expressStaticGzip(staticPath, {
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enableBrotli,
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orderPreference: enableBrotli ? ['br', 'gz'] : ['gz'],
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setHeaders,
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index: false,
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});
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}
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}
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module.exports = staticCache;
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