Update 12 files

- /vendor/libarchive/LICENSE
- /vendor/libarchive/worker-bundle.js
- /vendor/libarchive/wasm-gen/libarchive.js
- /vendor/libarchive/wasm-gen/libarchive.wasm
- /sw.js
- /offline.md
- /_layouts/default.html
- /_tools/serv00_post-receive
- /_tools/envs_post-receive
- /_data/proxylist.yml
- /assets/js/offline-page.js
- /assets/js/offline-unpack.js

_data/proxylist.yml

@@ -17,7 +17,6 @@ mirrors:
 - https://mayx.vercel.app/
 - https://mayx.netlify.app/
 - https://mayx.gitnet.page/
-- https://mayx.stormkit.dev/
 - https://mayx.grebedoc.dev/
 - https://mayx.codeberg.page/
 - https://mayx.tildepages.org/

_layouts/default.html

@@ -98,7 +98,8 @@ layout: xslt_container
         <li><a href="{{ site.github.tar_url }}">Download <strong>TAR Ball</strong></a></li>
         <li><a href="{{ site.github.repository_url }}">View On <strong>GitHub</strong></a></li>
         {% else %}
-        <li style="width: 270px; border-right: none;"><a href="/MayxBlog.7z">Download <strong>7-Zip File</strong></a></li>
+        <li style="width: 174px;"><a href="/MayxBlog.7z">Download <strong>7-Zip File</strong></a></li>
+        <li style="width: 174px;"><a href="/offline.html">Manage <strong>Offline Mode</strong></a></li>
         {% endif %}
       </ul>
     </header>

_tools/envs_post-receive

@@ -7,7 +7,8 @@ mkdir Mabbs
 curl -L -o Mabbs/README.md https://github.com/Mabbs/Mabbs/raw/main/README.md
 bundle exec jekyll build -d ../public_html
 python3 _tools/blogquine.py --src-dir blog --quine-dir blog ../public_html/ MayxBlog.7z
-mv MayxBlog.7z ../public_html/
+7z a -mx9 -bd -bb0 MayxBlog-new.7z MayxBlog.7z
+mv MayxBlog-new.7z ../public_html/MayxBlog.7z
 cd ../public_html/
 unset GIT_DIR
 git init
@@ -18,6 +19,6 @@ git branch pages
 git remote add codeberg ssh://git@codeberg.org/mayx/pages.git
 git remote add bitbucket ssh://git@bitbucket.org/unmayx/unmayx.bitbucket.io.git
 git push -f codeberg main
-git push -f codeberg pages
+git push -f codeberg pages 
 git push -f bitbucket main
 /home/mayx/blog-env/node_modules/surge/bin/surge /home/mayx/public_html/ mayx.surge.sh

_tools/serv00_post-receive

@@ -7,13 +7,15 @@ mkdir Mabbs
 curl -L -o Mabbs/README.md https://github.com/Mabbs/Mabbs/raw/main/README.md
 bundle exec jekyll build -d ../domains/mayx.serv00.net/public_html/
 python3 _tools/blogquine.py --src-dir blog --quine-dir blog ../domains/mayx.serv00.net/public_html/ MayxBlog.7z
-mv MayxBlog.7z ../domains/mayx.serv00.net/public_html/
+7zz a -mx9 -bd -bb0 MayxBlog-new.7z MayxBlog.7z
+mv MayxBlog-new.7z ../domains/mayx.serv00.net/public_html/MayxBlog.7z
 rsync -avz --delete ../domains/mayx.serv00.net/public_html/ mayx@web.sourceforge.net:/home/project-web/mayx/htdocs/
 cd ../domains/mayx.serv00.net/public_html/
 unset GIT_DIR
 git init
 git lfs install
 git lfs track "*.png"
+git lfs track "*.webp"
 git lfs track "*.moc"
 git lfs track "*.tgz"
 git lfs track "*.jpg"

assets/js/offline-page.js

@@ -0,0 +1,119 @@
+/*
+ * Mayx的博客 · /offline.html 控制页控制器（classic script，PJAX 兼容）
+ *
+ * 本体是 IIFE，不含模块语法：PJAX 换页时 jQuery 会重新执行本文件，
+ * 每次执行都重新查询元素、重新绑定事件，天然幂等。真正的解包逻辑在
+ * ES module /assets/js/offline-unpack.js 中，通过动态 import() 加载
+ * （浏览器模块缓存保证 PJAX 反复进入本页也不会重复加载）。
+ * 注意：本文件经 Liquid 原样输出，不能使用模板语法字符。
+ */
+
+(function () {
+  var MODULE_URL = '/assets/js/offline-unpack.js';
+  // 压缩包大致量级（当前约 27MB），仅用于进度条比例，不影响正确性
+  var EXPECTED_BYTES = 27 * 1024 * 1024;
+  var busy = false;
+
+  function el(id) { return document.getElementById(id); }
+  function fmtMB(bytes) { return (bytes / 1048576).toFixed(1) + ' MB'; }
+
+  function setMessage(text) {
+    el('offline-message').textContent = text || '';
+  }
+
+  function showProgress(show) {
+    el('offline-progress-box').hidden = !show;
+  }
+
+  function render(meta) {
+    var online = !meta;
+    el('offline-state').textContent = online
+      ? '在线模式（离线未启用）'
+      : '离线模式（优先从本地缓存加载）';
+    el('offline-version').textContent = online ? '-' : fmtMB(meta.payloadSize) + '（压缩包大小即版本号）';
+    el('offline-files').textContent = online ? '-' : meta.files + ' 个文件 / ' + fmtMB(meta.bytes);
+    el('offline-time').textContent = online ? '-' : new Date(meta.unpackedAt).toLocaleString();
+    el('offline-persist').textContent = online ? '-' : (meta.persisted ? '已授权（缓存不会被自动回收）' : '未授权（浏览器空间紧张时可能回收缓存）');
+    el('offline-enable').disabled = busy || !online;
+    el('offline-disable').disabled = busy || online;
+  }
+
+  function onProgress(info) {
+    if (info.done) return;
+    el('offline-progress').value = Math.min(100, (info.bytes / EXPECTED_BYTES) * 100);
+    el('offline-progress-text').textContent =
+      '已解包 ' + info.files + ' 个文件（' + fmtMB(info.bytes) + '）…';
+  }
+
+  function withModule(fn) {
+    return import(MODULE_URL).then(fn);
+  }
+
+  function refresh() {
+    if (!('serviceWorker' in navigator) || !('caches' in window)) {
+      el('offline-state').textContent = '当前浏览器不支持离线模式（需要 Service Worker）';
+      el('offline-enable').disabled = true;
+      el('offline-disable').disabled = true;
+      return;
+    }
+    withModule(function (mod) { return mod.ensureFresh(); }).then(function (fresh) {
+      render(fresh.ready ? fresh.meta : null);
+      if (fresh.stale) {
+        setMessage('检测到站点压缩包已更新，离线缓存已自动失效，当前处于在线模式。可重新启用离线模式。');
+      }
+    }).catch(function (e) {
+      setMessage('状态检测失败：' + (e && e.message ? e.message : e));
+    });
+  }
+
+  function onEnable() {
+    busy = true;
+    render(null);
+    showProgress(true);
+    setMessage('正在下载并解包站点压缩包，请保持网络连接…');
+    withModule(function (mod) { return mod.activateOffline({ onProgress: onProgress }); })
+      .then(function (meta) {
+        el('offline-progress').value = 100;
+        el('offline-progress-text').textContent = '解包完成';
+        setMessage('离线模式已启用。之后访问本博客将优先使用本地缓存，断网也能阅读。');
+        busy = false;
+        showProgress(false);
+        render(meta); // 立即展示离线状态，不必等后台刷新
+      })
+      .catch(function (e) {
+        setMessage('启用失败：' + (e && e.message ? e.message : e));
+        busy = false;
+        showProgress(false);
+        refresh();
+      });
+  }
+
+  function onDisable() {
+    busy = true;
+    setMessage('');
+    withModule(function (mod) { return mod.deactivateOffline(); })
+      .then(function () {
+        setMessage('已切回在线模式，之后页面将通过网络加载。');
+        busy = false;
+        render(null);
+        if (navigator.onLine) {
+          setTimeout(function () { location.reload(); }, 800);
+        }
+      })
+      .catch(function (e) {
+        setMessage('操作失败：' + (e && e.message ? e.message : e));
+        busy = false;
+        refresh();
+      });
+  }
+
+  function bind() {
+    var enable = el('offline-enable');
+    if (!enable) return; // 不在控制页（PJAX 容错）
+    enable.addEventListener('click', onEnable);
+    el('offline-disable').addEventListener('click', onDisable);
+    refresh();
+  }
+
+  bind();
+})();

assets/js/offline-unpack.js

@@ -0,0 +1,269 @@
+/*
+ * Mayx的博客 · 离线模式核心逻辑（/offline.html 控制页使用，ES module）
+ *
+ * - activateOffline()：注册 SW，下载站点压缩包 /MayxBlog.7z，经 libarchive(WASM)
+ *   流式解包，把每个文件按站点路径写入 Cache Storage，最后写入就绪标记
+ *   （清单 + payloadSize 版本号），自此进入离线模式。
+ * - ensureFresh()：HEAD 探测线上压缩包大小，与标记中的 payloadSize 不一致
+ *   说明站点已更新 → 清空缓存，回退在线模式。
+ * - deactivateOffline()：清空缓存，手动切回在线模式。
+ * - readStatus()：读取当前离线状态，供控制页展示。
+ *
+ */
+
+const ARCHIVE_URL = '/MayxBlog.7z';
+const ARCHIVE_ROOT = 'blog/';
+const CACHE_NAME = 'mayxblog-offline-v1';
+const READY_KEY = '/__offline_manifest__';
+const WORKER_URL = '/vendor/libarchive/worker-bundle.js';
+
+const MIME = {
+  html: 'text/html; charset=utf-8',
+  htm: 'text/html; charset=utf-8',
+  css: 'text/css; charset=utf-8',
+  js: 'application/javascript; charset=utf-8',
+  mjs: 'application/javascript; charset=utf-8',
+  json: 'application/json; charset=utf-8',
+  xml: 'application/xml; charset=utf-8',
+  xsl: 'text/xsl; charset=utf-8',
+  opml: 'text/x-opml; charset=utf-8',
+  txt: 'text/plain; charset=utf-8',
+  md: 'text/markdown; charset=utf-8',
+  csv: 'text/csv; charset=utf-8',
+  svg: 'image/svg+xml',
+  png: 'image/png',
+  jpg: 'image/jpeg',
+  jpeg: 'image/jpeg',
+  gif: 'image/gif',
+  webp: 'image/webp',
+  avif: 'image/avif',
+  ico: 'image/x-icon',
+  bmp: 'image/bmp',
+  woff: 'font/woff',
+  woff2: 'font/woff2',
+  ttf: 'font/ttf',
+  otf: 'font/otf',
+  eot: 'application/vnd.ms-fontobject',
+  mp3: 'audio/mpeg',
+  mp4: 'video/mp4',
+  webm: 'video/webm',
+  '7z': 'application/x-7z-compressed',
+  zip: 'application/zip',
+  wasm: 'application/wasm',
+  mtn: 'application/octet-stream',
+  moc: 'application/octet-stream',
+  pdf: 'application/pdf',
+};
+
+function mimeFor(pathname) {
+  const dot = pathname.lastIndexOf('.');
+  const ext = dot === -1 ? '' : pathname.slice(dot + 1).toLowerCase();
+  return MIME[ext] || 'application/octet-stream';
+}
+
+function sitePathFor(entryPath) {
+  const normalized = entryPath.replace(/\\/g, '/');
+  if (!normalized.startsWith(ARCHIVE_ROOT)) return null;
+  const relative = normalized.slice(ARCHIVE_ROOT.length);
+  if (!relative) return null;
+
+  const segments = [];
+  for (const segment of relative.split('/')) {
+    if (!segment || segment === '.') continue;
+    if (segment === '..') return null;
+    segments.push(segment);
+  }
+  if (!segments.length) return null;
+  return '/' + segments.join('/');
+}
+
+/*
+ * 在独立 worker 中打开一层压缩包并流式吐出条目；
+ * 返回其中根级嵌套压缩包（下一层包装）的原始字节。
+ */
+function extractLayer(file, onEntry) {
+  return new Promise((resolve, reject) => {
+    const worker = new Worker(WORKER_URL);
+    const nested = [];
+    let settled = false;
+
+    const finish = (error) => {
+      if (settled) return;
+      settled = true;
+      worker.terminate();
+      if (error) reject(error);
+      else resolve(nested);
+    };
+
+    worker.addEventListener('error', (event) => {
+      finish(new Error(event.message || 'libarchive worker failed'));
+    });
+
+    worker.addEventListener('message', ({ data }) => {
+      if (data.type === 'ERROR') {
+        finish(new Error(data.error && data.error.message ? data.error.message : 'libarchive failed'));
+        return;
+      }
+      if (data.type === 'READY') {
+        worker.postMessage({ type: 'OPEN', file });
+        return;
+      }
+      if (data.type === 'OPENED') {
+        worker.postMessage({ type: 'EXTRACT_FILES' });
+        return;
+      }
+      if (data.type === 'END') {
+        finish(null);
+        return;
+      }
+      if (data.type !== 'ENTRY') return;
+
+      const entry = data.entry;
+      if (entry.type !== 'FILE' || !entry.fileData) return;
+
+      // 根级压缩包是下一层包装，不是站点内容
+      if (entry.path.replace(/\\/g, '/') === 'MayxBlog.7z') {
+        nested.push(entry.fileData);
+        return;
+      }
+      onEntry(entry);
+    });
+  });
+}
+
+/* 几十 MB 的缓存是浏览器常见的回收对象，而重新解包代价高，尽量申请持久存储。 */
+async function requestPersistence() {
+  if (!navigator.storage || !navigator.storage.persist) return false;
+  try {
+    if (await navigator.storage.persisted()) return true;
+    return await navigator.storage.persist();
+  } catch {
+    return false;
+  }
+}
+
+/* 读取就绪标记（= 离线模式状态）；损坏或缺清单的标记视为不存在。 */
+export async function readStatus() {
+  const cache = await caches.open(CACHE_NAME);
+  const hit = await cache.match(READY_KEY);
+  if (!hit) return null;
+  const meta = await hit.json().catch(() => null);
+  if (!meta || !Array.isArray(meta.keys) || !meta.keys.length) return null;
+  return meta;
+}
+
+/*
+ * 线上压缩包的大小即版本号。HEAD 不被 SW 拦截，拿到的一定是线上真实值；
+ * 网络失败返回 null，调用方选择信任现有缓存而不是误伤。
+ */
+async function payloadSize() {
+  try {
+    const response = await fetch(ARCHIVE_URL, { method: 'HEAD', cache: 'no-store' });
+    if (!response.ok) return null;
+    const size = Number(response.headers.get('content-length'));
+    return Number.isFinite(size) && size > 0 ? size : null;
+  } catch {
+    return null;
+  }
+}
+
+/*
+ * 控制页打开时调用：未启用 → {ready:false}；已启用且版本一致 → {ready:true, meta}；
+ * 版本不一致 → 清空缓存并返回 {ready:false, stale:true}（已回退在线模式）。
+ */
+export async function ensureFresh() {
+  const cache = await caches.open(CACHE_NAME);
+  const size = await payloadSize();
+  const meta = await readStatus();
+
+  if (!meta) return { ready: false, size, stale: false };
+  if (size && meta.payloadSize !== size) {
+    await caches.delete(CACHE_NAME);
+    return { ready: false, size, stale: true };
+  }
+  return { ready: true, size, stale: false, meta };
+}
+
+/*
+ * 启用离线模式：注册 SW → 清空旧缓存（同时清掉上次中断的残留，保证随后
+ * 的压缩包下载不会被旧缓存喂旧的 quine 副本）→ 下载并逐层解包 → 写标记。
+ */
+export async function activateOffline({ onProgress } = {}) {
+  if (!('serviceWorker' in navigator)) {
+    throw new Error('当前浏览器不支持 Service Worker，无法启用离线模式。');
+  }
+  await navigator.serviceWorker.register('/sw.js', { scope: '/' });
+  await navigator.serviceWorker.ready;
+  await caches.delete(CACHE_NAME);
+
+  const persisted = await requestPersistence();
+
+  // 写操作串行链，保证按到达顺序落盘且不产生无界并发
+  const cache = await caches.open(CACHE_NAME);
+  let writes = Promise.resolve();
+  const keys = new Set();
+  let files = 0;
+  let bytes = 0;
+  let skipped = 0;
+
+  const response = await fetch(ARCHIVE_URL, { cache: 'no-store' });
+  if (!response.ok) throw new Error(`无法下载站点压缩包：HTTP ${response.status}`);
+  const outer = await response.arrayBuffer();
+  const downloadedBytes = outer.byteLength;
+
+  let layer = [outer];
+  while (layer.length) {
+    const bytesThisLayer = layer.shift();
+    const file = new File([bytesThisLayer], 'MayxBlog.7z');
+
+    layer = await extractLayer(file, (entry) => {
+      const key = sitePathFor(entry.path);
+      if (!key) {
+        skipped += 1;
+        return;
+      }
+      const body = entry.fileData;
+      files += 1;
+      bytes += body.byteLength;
+
+      writes = writes.then(async () => {
+        await cache.put(key, new Response(body, {
+          status: 200,
+          headers: { 'Content-Type': mimeFor(key) },
+        }));
+        keys.add(key);
+      });
+
+      if (onProgress) onProgress({ done: false, files, bytes, skipped });
+    });
+  }
+
+  await writes;
+
+  const meta = {
+    files,
+    bytes,
+    skipped,
+    persisted,
+    payloadSize: downloadedBytes,
+    failed: files - keys.size,
+    keys: [...keys],
+    unpackedAt: new Date().toISOString(),
+  };
+  await cache.put(
+    READY_KEY,
+    new Response(JSON.stringify(meta), {
+      headers: { 'Content-Type': 'application/json; charset=utf-8' },
+    })
+  );
+
+  if (onProgress) onProgress({ done: true, cached: false, ...meta });
+  return meta;
+}
+
+/* 切回在线模式：删掉缓存（含标记），SW 随即恢复纯转发。返回之前是否处于离线模式。 */
+export async function deactivateOffline() {
+  const had = await readStatus();
+  await caches.delete(CACHE_NAME);
+  return Boolean(had);
+}

offline.md

@@ -0,0 +1,37 @@
+---  
+layout: default
+title: 离线模式
+---
+
+# 离线模式
+
+本页用于管理本博客的离线阅读功能：
+
+- **启用离线模式**：浏览器会下载整站压缩包（`MayxBlog.7z`）并解包到本地缓存，之后即使没有网络也能正常浏览博客；
+- **自动回退**：当站点压缩包更新（博客重新部署）时，离线缓存会自动失效并回退到在线模式，下次重新启用即可获取最新内容；
+- **手动切换**：离线模式下可以随时在本页切回在线模式，切回后页面将重新通过网络加载。
+
+<table>  
+  <tbody>  
+    <tr><th>当前状态</th><td id="offline-state">检测中…</td></tr>  
+    <tr><th>缓存版本</th><td id="offline-version">-</td></tr>  
+    <tr><th>文件统计</th><td id="offline-files">-</td></tr>  
+    <tr><th>解包时间</th><td id="offline-time">-</td></tr>  
+    <tr><th>持久存储</th><td id="offline-persist">-</td></tr>  
+  </tbody>  
+</table>
+
+<p id="offline-progress-box" hidden="hidden">  
+  <progress id="offline-progress" max="100" value="0"></progress>  
+  
+  <small id="offline-progress-text">准备中…</small>  
+</p>
+
+<p><strong id="offline-message"></strong></p>
+
+<p>  
+  <button type="button" id="offline-enable">启用离线模式</button>  
+  <button type="button" id="offline-disable">切换回在线模式</button>  
+</p>
+
+<script src="/assets/js/offline-page.js"></script>

sw.js

@@ -0,0 +1,140 @@
+/*
+ * Mayx的博客 · 离线模式 Service Worker
+ *
+ * 两种模式（由 Cache Storage 中是否存在就绪标记决定）：
+ * - 在线模式（默认，无标记）：所有请求原样转发网络，SW 形同虚设。
+ * - 离线模式（/offline.html 启用后写入标记）：同源 GET 请求缓存优先，
+ *   缓存未命中且清单里没有的路径才回源网络，实现断网阅读。
+ *
+ * 版本控制：压缩包 /MayxBlog.7z 的 content-length 即版本号（每次重新部署
+ * 都会变化）。SW 激活时、以及导航请求按 RECHECK_INTERVAL 节流复核；
+ * 一旦发现线上压缩包与已缓存版本不一致，立即清空缓存 → 自动回退在线模式。
+ * 网络不可用时复核失败，保留缓存（离线阅读本来就是离线模式的目的）。
+ */
+
+const CACHE_NAME = 'mayxblog-offline-v1';
+const READY_KEY = '/__offline_manifest__';
+const ARCHIVE_URL = '/MayxBlog.7z';
+const RECHECK_INTERVAL = 5 * 60 * 1000;
+
+let lastRecheck = 0;
+
+self.addEventListener('install', () => {
+  self.skipWaiting();
+});
+
+self.addEventListener('activate', (event) => {
+  event.waitUntil(
+    caches.keys()
+      .then((keys) =>
+        Promise.all(keys.filter((k) => k !== CACHE_NAME).map((k) => caches.delete(k)))
+      )
+      .then(verifyPayloadVersion)
+      .then(() => self.clients.claim())
+  );
+});
+
+/*
+ * HEAD 请求不被下面的 fetch 处理器拦截，这里读到的一定是线上真实压缩包，
+ * 而不是缓存里的 quine 副本。网络失败返回 null，调用方选择信任现有缓存。
+ */
+async function payloadSize() {
+  try {
+    const response = await fetch(ARCHIVE_URL, { method: 'HEAD', cache: 'no-store' });
+    if (!response.ok) return null;
+    const size = Number(response.headers.get('content-length'));
+    return Number.isFinite(size) && size > 0 ? size : null;
+  } catch {
+    return null;
+  }
+}
+
+/*
+ * 就绪标记同时是清单：记录了解包写入的所有路径。没有它就无法区分
+ * “站点本来就没有这个页面”和“缓存条目被浏览器回收了”。
+ */
+async function readManifest(cache) {
+  const hit = await cache.match(READY_KEY);
+  if (!hit) return null;
+  const meta = await hit.json().catch(() => null);
+  if (!meta || !Array.isArray(meta.keys) || !meta.keys.length) return null;
+  return meta;
+}
+
+/* 压缩包更新 → 清空缓存（即回退在线模式）；返回是否发生了失效。 */
+async function verifyPayloadVersion() {
+  const cache = await caches.open(CACHE_NAME);
+  const meta = await readManifest(cache);
+  if (!meta) return false;
+  const size = await payloadSize();
+  if (size && meta.payloadSize !== size) {
+    await caches.delete(CACHE_NAME);
+    return true;
+  }
+  return false;
+}
+
+/* 服务器对目录索引的处理与 Jekyll 产物一致，这里补齐候选路径。 */
+function candidatesFor(pathname) {
+  const keys = [pathname];
+  if (pathname.endsWith('/')) {
+    keys.push(pathname + 'index.html');
+  } else {
+    keys.push(pathname + '/index.html');
+    keys.push(pathname + '.html');
+  }
+  return keys;
+}
+
+self.addEventListener('fetch', (event) => {
+  const request = event.request;
+  if (request.method !== 'GET') return; // HEAD 等直通网络（版本探测依赖这一点）
+
+  const url = new URL(request.url);
+  if (url.origin !== self.location.origin) return; // 跨域请求不干预
+
+  // 显式 no-store 的请求（重新下载压缩包等）绕过缓存，避免吃到旧的 quine 副本
+  if (request.cache === 'no-store') return;
+
+  event.respondWith(respond(request, url, event));
+});
+
+async function respond(request, url, event) {
+  const cache = await caches.open(CACHE_NAME);
+
+  // 导航请求顺带做节流版本复核；失效发生在后台，本次响应不受影响，
+  // 下一次请求自然落入在线模式。
+  if (request.mode === 'navigate' && Date.now() - lastRecheck > RECHECK_INTERVAL) {
+    lastRecheck = Date.now();
+    event.waitUntil(verifyPayloadVersion());
+  }
+
+  const candidates = candidatesFor(url.pathname);
+  for (const key of candidates) {
+    const hit = await cache.match(key);
+    if (hit) return hit;
+  }
+
+  const meta = await readManifest(cache);
+  if (!meta) return fetch(request); // 在线模式：纯转发
+
+  // 清单承诺过这个路径但缓存里没有 → 条目被浏览器回收，缓存已不可信，
+  // 整体作废并回退在线模式。
+  if (candidates.some((key) => meta.keys.includes(key))) {
+    await caches.delete(CACHE_NAME);
+    return fetch(request);
+  }
+
+  // 清单之外的路径回源网络；断网时的导航请求用站点 404 页兜底。
+  try {
+    return await fetch(request);
+  } catch (error) {
+    if (request.mode === 'navigate') {
+      const notFound = await cache.match('/404.html');
+      if (notFound) {
+        return new Response(notFound.body, { status: 404, headers: notFound.headers });
+      }
+    }
+    throw error;
+  }
+}

vendor/libarchive/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 ნიკა
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.