Files
sproutblog/worker.js
shumengya 323869e6ca feat: 静态资源与前端 Markdown、浏览量、Gitea 同步内容
- 将 Markdown/KaTeX/高亮/Mermaid 移至 public 与 CDN,减小 Worker 体积
- 文章列表:标题、简介、时间与浏览量;访问文章时递增 view_count
- 新增 migrations/0003 与 blog 路由等配置
- 加入 public 资源与站点图标

Made-with: Cursor
2026-04-14 14:07:46 +08:00

773 lines
24 KiB
JavaScript

const DEFAULT_SITE_TITLE = "SproutBlog";
export default {
async fetch(request, env) {
const url = new URL(request.url);
const path = normalizePath(url.pathname);
if (!env.DB) {
return htmlResponse(renderLayout("配置缺失", `
<h1>DB 绑定未配置</h1>
<p>请先在 <code>wrangler.toml</code> 里配置 D1 数据库。</p>
`, env), 500);
}
if (request.method === "OPTIONS") {
return new Response(null, { headers: corsHeaders() });
}
try {
if (path === "/admin/session" && request.method === "POST") {
return await handleAdminSession(request, env);
}
if (request.method === "GET") {
if (path === "/") return await handleIndex(env, url);
if (path.startsWith("/post/")) return await handlePost(env, path.slice(6));
if (path === "/admin" || path === "/admin/new" || path.startsWith("/admin/edit/")) {
return await handleAdminPage(request, env, url, path);
}
if (path === "/api/posts") return await handleApiList(env, url);
if (path.startsWith("/api/posts/")) return await handleApiRead(env, path.slice(11));
}
if (path === "/admin/save" && request.method === "POST") {
return await handleAdminSave(request, env, url);
}
if (path === "/admin/delete" && request.method === "POST") {
return await handleAdminDelete(request, env, url);
}
if (path === "/api/posts" && request.method === "POST") {
return await handleApiCreate(request, env);
}
if (path.startsWith("/api/posts/")) {
const idOrSlug = path.slice(11);
if (request.method === "PUT") return await handleApiUpdate(request, env, idOrSlug);
if (request.method === "DELETE") return await handleApiDelete(request, env, idOrSlug);
}
return notFoundPage(env);
} catch (error) {
return htmlResponse(renderLayout("错误", `
<h1>发生错误</h1>
<pre>${escapeHtml(error?.stack || error?.message || String(error))}</pre>
`, env), 500);
}
}
};
async function handleIndex(env, url) {
const q = (url.searchParams.get("q") || "").trim();
const posts = await listPosts(env.DB, { publishedOnly: true, q });
return htmlResponse(renderLayout(pageTitle(env, "首页"), `
${q ? `<p>搜索:<strong>${escapeHtml(q)}</strong></p>` : ""}
${posts.length ? posts.map(renderPostCard).join("") : "<p>暂无文章。</p>"}
`, env));
}
async function handlePost(env, slug) {
const post = await env.DB.prepare(
"SELECT * FROM posts WHERE slug = ? AND published = 1 LIMIT 1"
).bind(decodeURIComponent(slug)).first();
if (!post) return notFoundPage(env);
await env.DB.prepare(
"UPDATE posts SET view_count = COALESCE(view_count, 0) + 1 WHERE id = ?"
).bind(post.id).run();
const views = (Number(post.view_count) || 0) + 1;
return htmlResponse(renderLayout(`${post.title} - ${pageTitle(env)}`, `
<p><a href="/">返回首页</a></p>
<article>
<h1>${escapeHtml(post.title)}</h1>
<p class="post-detail-meta"><span class="post-detail-time">${formatDateTime(post.updated_at)}</span><span class="post-detail-views">浏览 ${views}</span></p>
${markdownPlaceholder(post.content)}
</article>
`, env, { markdownPage: true }));
}
async function handleAdminPage(request, env, url, path) {
const auth = await requireAdmin(request, env);
if (auth) return auth;
let post = blankPost();
if (path.startsWith("/admin/edit/")) {
const id = Number(path.slice("/admin/edit/".length));
if (Number.isFinite(id) && id > 0) {
post = await getPostById(env.DB, id) || post;
}
} else if (path === "/admin" && url.searchParams.get("id")) {
const id = Number(url.searchParams.get("id"));
if (Number.isFinite(id) && id > 0) {
post = await getPostById(env.DB, id) || post;
}
}
const q = (url.searchParams.get("q") || "").trim();
const posts = await listPosts(env.DB, { publishedOnly: false, q });
return htmlResponse(renderLayout(`后台 - ${pageTitle(env)}`, `
<p><a href="/">返回首页</a></p>
<h1>后台</h1>
<section>
<h2>${post.id ? `编辑 #${post.id}` : "新建文章"}</h2>
<form method="post" action="/admin/save">
<input type="hidden" name="id" value="${escapeAttr(post.id || "")}">
<p>
<label>标题<br><input name="title" type="text" value="${escapeAttr(post.title || "")}" required></label>
</p>
<p>
<label>Slug<br><input name="slug" type="text" value="${escapeAttr(post.slug || "")}"></label>
</p>
<p>
<label>摘要<br><input name="excerpt" type="text" value="${escapeAttr(post.excerpt || "")}"></label>
</p>
<p>
<label>内容<br><textarea name="content" required>${escapeHtml(post.content || "")}</textarea></label>
</p>
<p>
<label><input name="published" type="checkbox" value="1" ${post.published ? "checked" : ""}> 发布</label>
</p>
<p><button type="submit">保存</button></p>
</form>
</section>
<hr>
<section>
<h2>文章列表</h2>
<form method="get" action="/admin">
<p>
<label>查询<br><input name="q" type="text" value="${escapeAttr(q)}"></label>
</p>
<p><button type="submit">搜索</button></p>
</form>
${posts.length ? posts.map(renderAdminCard).join("") : "<p>没有找到文章。</p>"}
</section>
`, env));
}
async function handleAdminSave(request, env, url) {
const auth = await requireAdmin(request, env);
if (auth) return auth;
const data = await readBody(request);
const rawId = data.id ? Number(data.id) : null;
const id = Number.isFinite(rawId) && rawId > 0 ? rawId : null;
const title = cleanText(data.title);
const content = cleanText(data.content);
const excerpt = cleanText(data.excerpt);
const slugBase = cleanText(data.slug) || title;
const published = isTruthy(data.published) ? 1 : 0;
if (!title || !content) {
return htmlResponse(renderLayout("表单错误", `
<h1>标题和内容不能为空</h1>
<p><a href="/admin">返回后台</a></p>
`, env), 400);
}
const slug = await uniqueSlug(env.DB, slugify(slugBase), id);
const now = new Date().toISOString();
if (id) {
const exists = await getPostById(env.DB, id);
if (!exists) return notFoundPage(env);
await env.DB.prepare(`
UPDATE posts
SET title = ?, slug = ?, excerpt = ?, content = ?, published = ?, updated_at = ?
WHERE id = ?
`).bind(title, slug, excerpt, content, published, now, id).run();
} else {
const result = await env.DB.prepare(`
INSERT INTO posts (title, slug, excerpt, content, published, created_at, updated_at)
VALUES (?, ?, ?, ?, ?, ?, ?)
`).bind(title, slug, excerpt, content, published, now, now).run();
return Response.redirect(new URL(`/admin?id=${result.meta.last_row_id}&saved=1`, url), 303);
}
return Response.redirect(new URL(`/admin?id=${id}&saved=1`, url), 303);
}
async function handleAdminDelete(request, env, url) {
const auth = await requireAdmin(request, env);
if (auth) return auth;
const data = await readBody(request);
const id = Number(data.id);
if (!Number.isFinite(id) || id <= 0) {
return htmlResponse(renderLayout("表单错误", `
<h1>无效的文章 ID</h1>
<p><a href="/admin">返回后台</a></p>
`, env), 400);
}
await env.DB.prepare("DELETE FROM posts WHERE id = ?").bind(id).run();
return Response.redirect(new URL(`/admin?deleted=1`, url), 303);
}
async function handleAdminSession(request, env) {
const password = cleanText(env.ADMIN_PASSWORD);
if (!password) {
return jsonResponse({ ok: false, error: "not_configured" }, 503);
}
const data = await readBody(request);
const token = cleanText(data.token);
if (token !== password) {
return jsonResponse({ ok: false, error: "invalid" }, 401);
}
const value = await adminSessionCookieValue(env);
const maxAge = 60 * 60 * 24 * 7;
const secure = new URL(request.url).protocol === "https:";
const parts = [`sb_admin=${value}`, "Path=/", "HttpOnly", "SameSite=Lax", `Max-Age=${maxAge}`];
if (secure) parts.push("Secure");
return jsonResponse({ ok: true }, 200, {
"Set-Cookie": parts.join("; ")
});
}
async function handleApiList(env, url) {
const q = (url.searchParams.get("q") || "").trim();
const posts = await listPosts(env.DB, { publishedOnly: false, q });
return jsonResponse({ ok: true, posts });
}
async function handleApiRead(env, idOrSlug) {
const post = await readPost(env.DB, idOrSlug);
if (!post) return jsonResponse({ ok: false, error: "Not found" }, 404);
return jsonResponse({ ok: true, post });
}
async function handleApiCreate(request, env) {
const auth = await requireAdmin(request, env);
if (auth) return auth;
const data = await readBody(request);
const created = await createOrUpdatePost(env.DB, data, null);
return jsonResponse({ ok: true, post: created }, 201);
}
async function handleApiUpdate(request, env, idOrSlug) {
const auth = await requireAdmin(request, env);
if (auth) return auth;
const data = await readBody(request);
const existing = await readPost(env.DB, idOrSlug);
if (!existing) return jsonResponse({ ok: false, error: "Not found" }, 404);
const updated = await createOrUpdatePost(env.DB, data, existing.id);
return jsonResponse({ ok: true, post: updated });
}
async function handleApiDelete(request, env, idOrSlug) {
const auth = await requireAdmin(request, env);
if (auth) return auth;
const post = await readPost(env.DB, idOrSlug);
if (!post) return jsonResponse({ ok: false, error: "Not found" }, 404);
await env.DB.prepare("DELETE FROM posts WHERE id = ?").bind(post.id).run();
return jsonResponse({ ok: true, deleted: post.id });
}
async function createOrUpdatePost(db, data, currentId) {
const rawId = currentId ? Number(currentId) : null;
const id = Number.isFinite(rawId) && rawId > 0 ? rawId : null;
const title = cleanText(data.title);
const content = cleanText(data.content);
const excerpt = cleanText(data.excerpt);
const slugBase = cleanText(data.slug) || title;
const published = isTruthy(data.published) ? 1 : 0;
if (!title || !content) {
throw new Error("title 和 content 不能为空");
}
const slug = await uniqueSlug(db, slugify(slugBase), id);
const now = new Date().toISOString();
if (id) {
await db.prepare(`
UPDATE posts
SET title = ?, slug = ?, excerpt = ?, content = ?, published = ?, updated_at = ?
WHERE id = ?
`).bind(title, slug, excerpt, content, published, now, id).run();
return await getPostById(db, id);
}
const result = await db.prepare(`
INSERT INTO posts (title, slug, excerpt, content, published, created_at, updated_at)
VALUES (?, ?, ?, ?, ?, ?, ?)
`).bind(title, slug, excerpt, content, published, now, now).run();
return await getPostById(db, result.meta.last_row_id);
}
async function readPost(db, idOrSlug) {
if (!idOrSlug) return null;
const trimmed = decodeURIComponent(String(idOrSlug)).trim();
if (/^\d+$/.test(trimmed)) {
return await getPostById(db, Number(trimmed));
}
return await db.prepare("SELECT * FROM posts WHERE slug = ? LIMIT 1").bind(trimmed).first();
}
async function getPostById(db, id) {
return await db.prepare("SELECT * FROM posts WHERE id = ? LIMIT 1").bind(Number(id)).first();
}
async function listPosts(db, { publishedOnly = true, q = "" } = {}) {
const params = [];
const where = [];
if (publishedOnly) where.push("published = 1");
if (q) {
where.push("(title LIKE ? OR slug LIKE ? OR excerpt LIKE ? OR content LIKE ?)");
const like = `%${q}%`;
params.push(like, like, like, like);
}
const sql = `
SELECT * FROM posts
${where.length ? `WHERE ${where.join(" AND ")}` : ""}
ORDER BY published DESC, updated_at DESC, id DESC
`;
const statement = db.prepare(sql);
const { results } = params.length ? await statement.bind(...params).all() : await statement.all();
return results || [];
}
async function uniqueSlug(db, baseSlug, currentId) {
let slug = baseSlug || "post";
let suffix = 2;
while (true) {
const existing = await db.prepare("SELECT id FROM posts WHERE slug = ? LIMIT 1").bind(slug).first();
if (!existing || Number(existing.id) === Number(currentId)) return slug;
slug = `${baseSlug || "post"}-${suffix++}`;
}
}
function slugify(value) {
const raw = cleanText(value);
const slug = raw
.normalize("NFKD")
.replace(/[\u0300-\u036f]/g, "")
.replace(/[^\p{L}\p{N}]+/gu, "-")
.replace(/^-+|-+$/g, "")
.replace(/-+/g, "-")
.toLowerCase();
return slug || "post";
}
function renderPostCard(post) {
const excerpt = post.excerpt || stripMarkdown(post.content).slice(0, 180);
const views = Number(post.view_count) || 0;
return `
<article class="post-card">
<h2><a href="/post/${encodeURIComponent(post.slug)}">${escapeHtml(post.title)}</a></h2>
<p class="post-excerpt">${escapeHtml(excerpt)}${excerpt.length >= 180 ? "…" : ""}</p>
<p class="post-meta"><span class="post-card-time">${formatDateTime(post.updated_at)}</span><span class="post-card-views">浏览 ${views}</span></p>
</article>
`;
}
function renderAdminCard(post) {
return `
<article>
<h3>${escapeHtml(post.title)}</h3>
<p>ID: ${post.id} | Slug: ${escapeHtml(post.slug)} | ${post.published ? "已发布" : "草稿"} | ${formatDateTime(post.updated_at)}</p>
<div>
<a href="/admin/edit/${post.id}">编辑</a>
<form method="post" action="/admin/delete" style="display:inline">
<input type="hidden" name="id" value="${post.id}">
<button type="submit">删除</button>
</form>
</div>
</article>
`;
}
function renderLayout(title, body, env, options = {}) {
const site = cleanText(env?.SITE_TITLE) || DEFAULT_SITE_TITLE;
const mdHead = options.markdownPage
? `
<link rel="stylesheet" href="/css/markdown.css">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.16.45/dist/katex.min.css" crossorigin="anonymous">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/gh/highlightjs/cdn-release@11/build/styles/github.min.css" crossorigin="anonymous">
`
: "";
const mdScript = options.markdownPage
? `\n <script type="module" src="/js/markdown-client.js"></script>`
: "";
return `<!doctype html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>${escapeHtml(title)}</title>
<link rel="icon" href="/favicon.ico" sizes="any">
${mdHead}
<style>
html, body { margin: 0; padding: 0; background: #fff; color: #111; }
body { font-family: Arial, sans-serif; line-height: 1.7; }
main { max-width: 820px; margin: 0 auto; padding: 16px; }
header.site-header {
margin-bottom: 24px;
padding-bottom: 16px;
border-bottom: 1px solid #e8e8e8;
}
.site-brand {
display: flex;
align-items: center;
gap: 12px;
}
.site-title-link {
text-decoration: none;
color: inherit;
font-weight: 700;
font-size: 1.2rem;
}
.site-logo {
flex-shrink: 0;
width: 40px;
height: 40px;
object-fit: contain;
cursor: pointer;
}
.admin-gate {
position: fixed;
inset: 0;
background: rgba(0, 0, 0, 0.35);
display: flex;
align-items: center;
justify-content: center;
z-index: 9999;
}
.admin-gate[hidden] { display: none !important; }
.admin-gate-panel {
background: #fff;
padding: 16px;
border-radius: 8px;
border: 1px solid #ccc;
display: flex;
flex-wrap: wrap;
gap: 8px;
align-items: center;
max-width: 92vw;
}
.admin-gate-panel input[type="password"] { width: min(220px, 70vw); box-sizing: border-box; }
h1, h2, h3 { line-height: 1.3; margin: 0 0 12px; }
article, section { margin: 0 0 24px; }
p { margin: 0 0 12px; }
a { color: inherit; }
input, textarea, button { font: inherit; }
input[type="text"], textarea { width: 100%; box-sizing: border-box; }
textarea { min-height: 320px; }
pre { white-space: pre-wrap; word-break: break-word; }
img { max-width: 100%; height: auto; }
hr { border: 0; border-top: 1px solid #ddd; margin: 24px 0; }
.post-card .post-excerpt { margin: 0 0 10px; }
.post-card .post-meta {
font-size: 0.9em;
color: #555;
margin: 0 0 16px;
display: flex;
flex-wrap: wrap;
align-items: center;
gap: 8px 16px;
}
.post-detail-meta {
font-size: 0.95em;
color: #555;
margin: 0 0 16px;
display: flex;
flex-wrap: wrap;
align-items: center;
gap: 8px 16px;
}
.post-detail-views { color: #666; }
form { margin: 0; }
@media (max-width: 640px) {
main { padding: 12px; }
textarea { min-height: 240px; }
}
</style>
</head>
<body>
<main>
<header class="site-header">
<div class="site-brand">
<img class="site-logo" src="/logo.png" alt="" width="40" height="40" decoding="async">
<a href="/" class="site-title-link">${escapeHtml(site)}</a>
</div>
</header>
${body}
</main>
<div id="admin-gate" class="admin-gate" hidden>
<div class="admin-gate-panel">
<input id="admin-token" type="password" autocomplete="off" placeholder="Token" aria-label="Token">
<button type="button" id="admin-token-go">进入</button>
<button type="button" id="admin-token-cancel">取消</button>
</div>
</div>
<script>
(function () {
var logo = document.querySelector(".site-logo");
var gate = document.getElementById("admin-gate");
var inp = document.getElementById("admin-token");
var btnGo = document.getElementById("admin-token-go");
var btnCancel = document.getElementById("admin-token-cancel");
if (!logo || !gate || !inp || !btnGo || !btnCancel) return;
var n = 0;
var resetTimer = null;
function showGate() {
gate.hidden = false;
inp.value = "";
inp.focus();
}
function hideGate() {
gate.hidden = true;
}
logo.addEventListener("click", function (e) {
e.preventDefault();
if (resetTimer) clearTimeout(resetTimer);
n += 1;
if (n >= 5) {
n = 0;
showGate();
return;
}
resetTimer = setTimeout(function () { n = 0; }, 4000);
});
btnCancel.addEventListener("click", hideGate);
function submit() {
fetch("/admin/session", {
method: "POST",
headers: { "Content-Type": "application/json" },
credentials: "same-origin",
body: JSON.stringify({ token: inp.value })
})
.then(function (r) {
if (r.ok) {
hideGate();
location.href = "/admin";
return;
}
inp.select();
alert("Token 无效");
})
.catch(function () {
alert("网络错误");
});
}
btnGo.addEventListener("click", submit);
inp.addEventListener("keydown", function (e) {
if (e.key === "Enter") {
e.preventDefault();
submit();
}
});
})();
</script>${mdScript}
</body>
</html>`;
}
function b64EncodeUtf8(str) {
return btoa(unescape(encodeURIComponent(str)));
}
function markdownPlaceholder(raw) {
const src = String(raw ?? "");
if (!src.trim()) return "";
const b64 = b64EncodeUtf8(src);
return `<div class="markdown-body markdown-pending" data-b64-md="${escapeAttr(b64)}"><p class="markdown-loading">加载中…</p></div>`;
}
function stripMarkdown(text) {
return String(text ?? "")
.replace(/```[\s\S]*?```/g, " ")
.replace(/\$\$[\s\S]*?\$\$/g, " ")
.replace(/\$[^$\n]+\$/g, " ")
.replace(/!\[([^\]]*)\]\([^)]*\)/g, "$1")
.replace(/\[([^\]]+)\]\([^)]*\)/g, "$1")
.replace(/^\s{0,3}#{1,6}\s+/gm, "")
.replace(/^\s{0,3}>\s?/gm, "")
.replace(/^\s{0,3}[-*+]\s+/gm, "")
.replace(/^\s{0,3}\d+[.)]\s+/gm, "")
.replace(/[*_`~#]/g, " ")
.replace(/\s+/g, " ")
.trim();
}
function pageTitle(env, suffix = "") {
const site = cleanText(env.SITE_TITLE) || DEFAULT_SITE_TITLE;
return suffix ? `${site} - ${suffix}` : site;
}
function normalizePath(pathname) {
if (pathname === "/") return "/";
return pathname.replace(/\/+$/, "");
}
function htmlResponse(html, status = 200, headers = {}) {
return new Response(html, {
status,
headers: {
"content-type": "text/html; charset=UTF-8",
...headers
}
});
}
function jsonResponse(data, status = 200, extraHeaders = {}) {
return new Response(JSON.stringify(data, null, 2), {
status,
headers: {
"content-type": "application/json; charset=UTF-8",
...corsHeaders(),
...extraHeaders
}
});
}
function notFoundPage(env) {
return htmlResponse(renderLayout("404", `
<h1>404</h1>
<p>页面不存在。</p>
<p><a href="/">返回首页</a></p>
`, env), 404);
}
function corsHeaders() {
return {
"access-control-allow-origin": "*",
"access-control-allow-methods": "GET, POST, PUT, DELETE, OPTIONS",
"access-control-allow-headers": "*"
};
}
async function requireAdmin(request, env) {
const password = cleanText(env.ADMIN_PASSWORD);
if (!password) return null;
const cookies = parseCookie(request.headers.get("Cookie") || "");
const expected = await adminSessionCookieValue(env);
if (cookies.sb_admin && cookies.sb_admin === expected) {
return null;
}
const header = request.headers.get("Authorization") || "";
if (header.startsWith("Basic ")) {
try {
const decoded = atob(header.slice(6));
const split = decoded.indexOf(":");
const inputPassword = split >= 0 ? decoded.slice(split + 1) : "";
if (inputPassword === password) return null;
} catch {
// ignore
}
}
return unauthorized();
}
function parseCookie(header) {
const out = {};
if (!header) return out;
for (const part of header.split(";")) {
const idx = part.indexOf("=");
if (idx === -1) continue;
const k = part.slice(0, idx).trim();
const v = part.slice(idx + 1).trim();
try {
out[k] = decodeURIComponent(v);
} catch {
out[k] = v;
}
}
return out;
}
async function adminSessionCookieValue(env) {
const password = cleanText(env.ADMIN_PASSWORD);
const enc = new TextEncoder();
const data = enc.encode(`${password}\0sproutblog_admin_v1`);
const hash = await crypto.subtle.digest("SHA-256", data);
return [...new Uint8Array(hash)].map((b) => b.toString(16).padStart(2, "0")).join("");
}
function unauthorized() {
return new Response("Authentication required", {
status: 401,
headers: {
"content-type": "text/plain; charset=UTF-8"
}
});
}
async function readBody(request) {
const type = request.headers.get("content-type") || "";
if (type.includes("application/json")) {
return await request.json();
}
if (type.includes("multipart/form-data") || type.includes("application/x-www-form-urlencoded")) {
const form = await request.formData();
const data = {};
for (const [key, value] of form.entries()) {
data[key] = value;
}
return data;
}
return {};
}
function cleanText(value) {
return String(value ?? "").trim();
}
function isTruthy(value) {
return value === true || value === "true" || value === "1" || value === 1 || value === "on" || value === "yes";
}
function blankPost() {
return {
id: "",
title: "",
slug: "",
excerpt: "",
content: "",
published: 1
};
}
function escapeHtml(value) {
return String(value ?? "")
.replace(/&/g, "&amp;")
.replace(/</g, "&lt;")
.replace(/>/g, "&gt;")
.replace(/"/g, "&quot;")
.replace(/'/g, "&#39;");
}
function escapeAttr(value) {
return escapeHtml(value).replace(/`/g, "&#96;");
}
function formatDateTime(value) {
if (!value) return "";
const date = new Date(value);
if (Number.isNaN(date.getTime())) return escapeHtml(value);
const yyyy = date.getFullYear();
const mm = String(date.getMonth() + 1).padStart(2, "0");
const dd = String(date.getDate()).padStart(2, "0");
const hh = String(date.getHours()).padStart(2, "0");
const mi = String(date.getMinutes()).padStart(2, "0");
return `${yyyy}-${mm}-${dd} ${hh}:${mi}`;
}