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Cache the page-owned app response before starting the worker

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Jonathan Sykes
2026-10-08 09:04:20 +08:00
parent e7a7cdc6b9
commit a86fa1cebe
16 changed files with 186 additions and 17 deletions
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11
server/asset-manifest.js
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@@ -8,12 +8,12 @@ const tagHash = bytes => createHash('sha256').update(bytes).digest('hex').slice(
export const injectBuildTag = (source, tag) => source.replace(
/typeof __BUILD_TAG__ !== 'undefined' \? __BUILD_TAG__ : '[^']*'/, JSON.stringify(tag));
function embedAssets(source, files, groups, buildTag, hashing) {
function embedAssets(source, files, groups, buildTag, hashing, assetSync) {
const pageFiles = {};
for (const group of Object.values(groups)) for (const path of group.files) {
if (path !== '/index.html' && path !== '/sw.js') pageFiles[path] = { ...files[path], h: hashing ? files[path].h : buildTag };
}
const json = JSON.stringify({ buildTag, groups, files: pageFiles }).replace(/</g, '\\u003c');
const json = JSON.stringify({ buildTag, groups, files: pageFiles, appCache: assetSync }).replace(/</g, '\\u003c');
return source.replace(/(<script type="application\/json" id="ytp-assets">)[\s\S]*?(<\/script>)/, (_, open, close) => open + json + close);
}
@@ -70,16 +70,17 @@ export function createAssetManifest(publicDir = './public', { hashing = true, bu
}
const files = {};
for (const url of [...bytes.keys()].sort()) files[url] = { h: assetHash(bytes.get(url)), s: bytes.get(url).length, g: membership.get(url) || 'core' };
const source = bytes.get('/index.html')?.toString() ?? null;
const source = bytes.get('/index.html')?.toString()
.replaceAll('__APP_SCRIPT_HASH__', createHash('sha256').update(bytes.get('/app.js') || '').digest('base64')) ?? null;
const swSource = bytes.get('/sw.js')?.toString() ?? null;
// Derived build metadata cannot be an input to its own hash. Canonicalize
// the index meta and SW injected tag, then publish hashes of the final bytes.
// All original bytes (including index/SW source) remain inputs via source hashes.
let canonicalIndex = source === null ? null : stampIndex(embedAssets(source, files, groups, '__BUILD_TAG__', hashing), files, { hashing });
let canonicalIndex = source === null ? null : stampIndex(embedAssets(source, files, groups, '__BUILD_TAG__', hashing, assetSync), files, { hashing });
const canonical = { assetSync, files: { ...files }, groups, contracts };
if (canonicalIndex !== null && hashing) canonical.files['/index.html'] = { ...files['/index.html'], h: assetHash(canonicalIndex), s: Buffer.byteLength(canonicalIndex), source: files['/index.html'].h };
const buildTag = hashing ? tagHash(JSON.stringify(canonical)) : (override || legacy.digest('hex').slice(0, 12));
const index = source === null ? null : embedAssets(stampIndex(source, files, { hashing, buildTag }), files, groups, buildTag, hashing);
const index = source === null ? null : embedAssets(stampIndex(source, files, { hashing, buildTag }), files, groups, buildTag, hashing, assetSync);
const sw = swSource === null ? null : injectBuildTag(swSource, buildTag)
.replace("typeof __ASSET_SYNC__ !== 'undefined' ? __ASSET_SYNC__ : true", JSON.stringify(assetSync))
.replace("importScripts('/asset-sync-core.js')", "importScripts('/asset-sync-core.js?v=" + (files['/asset-sync-core.js']?.h || '') + "')");