zqlit
bcfa229105
- 邮件模板重做成微信聊天式：灰底、自己评论绿色气泡靠右、对方白色气泡靠左、 40px 圆角方头像（weavatar，邮箱 md5 不外泄）、时间居中、#07C160 主按钮； 布局全嵌套表格（Outlook 稳），表情内联 max-height:28px（修掉「表情太大」）、 配图限宽 100%；管理员主题从「新的评论待审」改成「您有一个新的评论」 - 老友自动填充：新增 /comments/lookup（只回昵称+网址，绝不含邮箱；IP 限速 30 次/10 分钟）+ 主题 comment-autofill 模块（填昵称弹提示、填邮箱自动带出 上次的昵称/网址，事件委托不怕 Artalk 重建编辑器） - CF 后台新增「国内线路」一键跳：/editor/handoff 用共享令牌对时间戳 HMAC 签名 → editor-api /admin/handoff 验签发会话 Cookie（2 分钟有效、防重放）， 晚高峰丢包时直达国内机后台免重新登录
533 lines
19 KiB
JavaScript
533 lines
19 KiB
JavaScript
/**
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* editor-api —— 只做「在线编辑文章」的轻量后端。
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*
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* 设计要点：
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* · 零 npm 依赖，只用 node 内置模块 —— 镜像小、没有供应链风险、也不用 npm ci
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* · 所有接口（除 /health）强制 X-Editor-Token，没有令牌一律 401。
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* 前端永远拿不到这个令牌 —— 它只存在于 Cloudflare Worker 的环境变量里，
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* 浏览器只跟 Worker 说话，Worker 鉴权通过后再加上令牌转发过来。
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* · 端口只绑到宿主机的 127.0.0.1，由 nginx 反代出去，公网扫不到。
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*
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* 环境变量见 README.md。
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*/
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import http from 'node:http';
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import fs from 'node:fs';
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import path from 'node:path';
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import crypto from 'node:crypto';
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import { makePosts } from './src/posts.mjs';
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import { makeGit } from './src/git.mjs';
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// ------------------------------------------------------------------ 配置
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const env = process.env;
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const cfg = {
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port: Number(env.PORT || 8017),
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host: env.BIND_HOST || '0.0.0.0',
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token: env.EDITOR_TOKEN || '',
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repoRoot: path.resolve(env.BLOG_ROOT || '/blog'),
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contentDir: path.resolve(env.BLOG_ROOT || '/blog', 'content', 'posts'),
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trashDir: path.resolve(env.TRASH_DIR || '/app/trash'),
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branch: env.GIT_BRANCH || 'main',
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pushRemotes: (env.PUSH_REMOTES || 'origin,gh').split(',').map((s) => s.trim()).filter(Boolean),
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authorName: env.GIT_AUTHOR_NAME || 'blog-editor',
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authorEmail: env.GIT_AUTHOR_EMAIL || 'editor@localhost',
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defaultAuthor: env.DEFAULT_AUTHOR || '',
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maxUpload: Number(env.MAX_UPLOAD_MB || 20) * 1024 * 1024,
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gitPaths: (env.GIT_PATHS || 'content,static').split(',').map((s) => s.trim()).filter(Boolean),
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// 博客对外地址（如 https://usj.cc）。配了才返回绝对链接，列表「预览」按钮才能直接开新窗口。
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blogBase: (env.BLOG_BASE || '').replace(/\/+$/, ''),
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// 订阅服务所在（Cloudflare 上的 rss-api）。国内机后台的订阅/友链请求由本服务
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// 反代过去，并带上共享令牌 —— 这样后台前端不必再持有「订阅口令」。
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rssBase: (env.RSS_API_BASE || 'https://api.200181.xyz').replace(/\/+$/, ''),
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// --- 后台登录（浏览器直连本机时用，与 Cloudflare 会话是两套）---------------
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// 背景：后台静态页部署在国内机，nginx 的原生 basic auth 弹窗既丑又没法做品牌，
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// 所以改成「自建登录页 + HttpOnly Cookie 会话」。令牌通道（X-Editor-Token）
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// 保持不变，供 Cloudflare Worker 侧继续使用。
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adminUser: env.ADMIN_USER || 'admin',
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adminPass: env.ADMIN_PASS || '',
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sessionFile: env.SESSION_FILE || '',
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sessionTtlMs: Number(env.SESSION_TTL_HOURS || 168) * 3600 * 1000,
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};
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if (!cfg.token) {
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console.error('[editor-api] 致命：没有设置 EDITOR_TOKEN。拒绝以无鉴权状态启动。');
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process.exit(1);
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}
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const posts = makePosts(cfg);
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const git = makeGit({ ...cfg, repoRoot: cfg.repoRoot, paths: cfg.gitPaths });
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// ------------------------------------------------------------------ HTTP 小工具
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function json(res, status, data) {
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const body = JSON.stringify(data);
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res.writeHead(status, {
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'Content-Type': 'application/json; charset=utf-8',
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'Cache-Control': 'no-store',
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'Content-Length': Buffer.byteLength(body),
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});
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res.end(body);
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}
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function readBody(req, limit) {
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return new Promise((resolve, reject) => {
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const chunks = [];
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let size = 0;
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req.on('data', (c) => {
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size += c.length;
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if (size > limit) {
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reject(Object.assign(new Error('请求体超过上限 ' + Math.round(limit / 1048576) + 'MB'), { status: 413 }));
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req.destroy();
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return;
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}
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chunks.push(c);
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});
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req.on('end', () => resolve(Buffer.concat(chunks)));
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req.on('error', reject);
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});
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}
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async function readJson(req, limit = 2 * 1024 * 1024) {
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const buf = await readBody(req, limit);
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if (!buf.length) return {};
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try {
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return JSON.parse(buf.toString('utf8'));
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} catch {
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throw Object.assign(new Error('请求体不是合法 JSON'), { status: 400 });
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}
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}
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/** 定长比较，避免令牌被逐字节试探 */
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function safeEqual(a, b) {
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const ba = Buffer.from(String(a));
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const bb = Buffer.from(String(b));
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if (ba.length !== bb.length) return false;
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return crypto.timingSafeEqual(ba, bb);
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}
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const safeName = (s) =>
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String(s || '')
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.replace(/[\\/]/g, '')
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.replace(/[^\w\u4e00-\u9fff.-]+/g, '_')
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.slice(0, 120);
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// ------------------------------------------------------------------ 后台会话
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/**
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* 登录态存内存 + 落一个 JSON 文件（重启不掉线）。
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* 会话 ID 是 32 字节随机数，Cookie 带 HttpOnly + SameSite=Lax，
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* 前端 JS 读不到，也就没法被 XSS 偷走。
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*/
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const SESSION_FILE =
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cfg.sessionFile || path.join(path.dirname(cfg.trashDir), '.editor-sessions.json');
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const sessions = new Map(); // sid -> { user, exp }
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function loadSessions() {
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try {
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const raw = JSON.parse(fs.readFileSync(SESSION_FILE, 'utf8'));
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const now = Date.now();
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for (const [sid, v] of Object.entries(raw || {})) {
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if (v && v.exp > now) sessions.set(sid, v);
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}
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} catch { /* 首次运行没有这个文件，正常 */ }
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}
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function saveSessions() {
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try {
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fs.mkdirSync(path.dirname(SESSION_FILE), { recursive: true });
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const now = Date.now();
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const obj = {};
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for (const [sid, v] of sessions) if (v.exp > now) obj[sid] = v;
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fs.writeFileSync(SESSION_FILE, JSON.stringify(obj), { mode: 0o600 });
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} catch (e) {
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console.error('[editor-api] 会话落盘失败（不影响运行）:', e.message);
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}
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}
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function parseCookies(req) {
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const out = {};
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for (const part of String(req.headers.cookie || '').split(';')) {
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const i = part.indexOf('=');
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if (i < 1) continue;
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out[part.slice(0, i).trim()] = decodeURIComponent(part.slice(i + 1).trim());
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}
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return out;
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}
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const COOKIE = 'ed_sid';
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/** 返回会话对象或 null（顺带清掉过期项） */
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function readSession(req) {
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const sid = parseCookies(req)[COOKIE];
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if (!sid) return null;
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const s = sessions.get(sid);
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if (!s) return null;
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if (s.exp <= Date.now()) {
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sessions.delete(sid);
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saveSessions();
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return null;
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}
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return s;
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}
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function setCookie(res, sid, maxAgeSec) {
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const parts = [
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COOKIE + '=' + sid,
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'Path=/',
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'HttpOnly',
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'Secure',
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'SameSite=Lax',
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'Max-Age=' + maxAgeSec,
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];
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res.setHeader('Set-Cookie', parts.join('; '));
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}
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/** HMAC-SHA256（key=共享令牌, msg=时间戳）的 hex，供「一键跳转」验签 */
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function hmacHex(key, msg) {
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try {
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return crypto.createHmac('sha256', key).update(msg).digest('hex');
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} catch {
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return '';
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}
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}
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/** 已消费的一键跳转签名（防重放）：同一签名只允许换一次会话 */
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const usedHandoff = new Set();
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// 暴力破解防护：同一 IP 连续失败到阈值就冷却一段时间
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const FAIL_MAX = 5;
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const FAIL_COOL_MS = 5 * 60 * 1000;
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const failures = new Map(); // ip -> { n, until }
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function clientIp(req) {
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return (
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String(req.headers['x-forwarded-for'] || '').split(',')[0].trim() ||
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(req.socket && req.socket.remoteAddress) ||
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'?'
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);
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}
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function failState(ip) {
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const f = failures.get(ip);
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if (!f) return null;
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if (f.until && f.until > Date.now()) return f;
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if (!f.until && f.n < FAIL_MAX) return f;
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failures.delete(ip);
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return null;
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}
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function noteFailure(ip) {
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const f = failures.get(ip) || { n: 0, until: 0 };
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f.n += 1;
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if (f.n >= FAIL_MAX) {
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f.until = Date.now() + FAIL_COOL_MS;
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f.n = 0;
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}
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failures.set(ip, f);
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}
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// ------------------------------------------------------------------ 订阅反代
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/** 需要转给订阅服务的路径前缀（后台的订阅源 / 友链模块用） */
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const RSS_PATH_PREFIXES = (env.RSS_PATHS || '/api/feeds,/api/links,/api/link-apply')
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.split(',')
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.map((s) => s.trim())
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.filter(Boolean);
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/**
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* 把订阅/友链请求原样转发到订阅服务（Cloudflare 上的 rss-api），带上共享令牌。
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* 用途：国内机后台的订阅源 / 友链模块 —— 请求由本机出去，前端不需要知道
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* 订阅口令，也不必为了这两个模块去登录 Cloudflare 后台。
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*
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* 鉴权在调用处完成（会话或令牌），这里只管转发。
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*/
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async function rssProxy(req, res, url) {
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const target = cfg.rssBase + url.pathname + url.search;
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const method = (req.method || 'GET').toUpperCase();
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const headers = { 'X-Editor-Token': cfg.token, Accept: 'application/json' };
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const ct = req.headers['content-type'];
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if (ct) headers['Content-Type'] = ct;
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let body;
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if (method !== 'GET' && method !== 'HEAD') {
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const buf = await readBody(req, 4 * 1024 * 1024);
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if (buf.length) body = buf;
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}
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let r;
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// 跨境那一跳会偶发握手失败（实测直连 CF 有时 0.3s 就断）。GET 是幂等的，
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// 重试一次基本就过去了 —— 不能让用户看到「订阅源加载失败」。
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const tries = method === 'GET' || method === 'HEAD' ? 2 : 1;
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for (let i = 0; i < tries; i++) {
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if (i) await new Promise((s) => setTimeout(s, 400));
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try {
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r = await fetch(target, { method, headers, body });
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break;
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} catch (e) {
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if (i === tries - 1) {
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throw Object.assign(new Error('订阅服务连不上：' + e.message), { status: 502 });
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}
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}
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}
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const buf = Buffer.from(await r.arrayBuffer());
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res.writeHead(r.status, {
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'Content-Type': r.headers.get('content-type') || 'application/json; charset=utf-8',
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'Cache-Control': 'no-store',
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'Content-Length': buf.length,
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});
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res.end(buf);
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}
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// ------------------------------------------------------------------ 路由
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const routes = [];
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const route = (method, pattern, handler) => {
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routes.push({ method, segs: pattern.split('/').filter(Boolean), handler });
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};
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const R = '<param>';
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const health = () => ({
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ok: true,
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repo: cfg.repoRoot,
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branch: cfg.branch,
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remotes: cfg.pushRemotes,
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time: new Date().toISOString(),
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});
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route('GET', '/health', health);
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route('GET', '/posts', async ({ query }) => posts.listPosts({
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q: query.get('q') || '',
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page: Number(query.get('page') || 1),
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perPage: Number(query.get('perPage') || 20),
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}));
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route('POST', '/posts', async ({ req }) => {
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const body = await readJson(req);
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if (!body.frontMatter || !body.frontMatter.title) {
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throw Object.assign(new Error('缺少标题'), { status: 400 });
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}
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return posts.createPost(body);
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});
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route('GET', `/posts/${R}`, async ({ params }) => {
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const post = posts.getPost(params[0]);
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if (!post) throw Object.assign(new Error('文章不存在'), { status: 404 });
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return post;
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});
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route('PUT', `/posts/${R}`, async ({ req, params }) => {
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const body = await readJson(req, 4 * 1024 * 1024);
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const out = posts.savePost(params[0], body);
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if (!out) throw Object.assign(new Error('文章不存在'), { status: 404 });
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return { ok: true, ...out };
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});
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route('DELETE', `/posts/${R}`, async ({ params }) => {
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const out = posts.deletePost(params[0]);
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if (!out) throw Object.assign(new Error('文章不存在'), { status: 404 });
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return { ok: true, ...out };
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});
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// 图片：直接 POST 原始二进制，文件名走 query —— 不解析 multipart，零依赖也简单
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route('POST', '/upload', async ({ req, query }) => {
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const type = req.headers['content-type'] || '';
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if (!type.startsWith('image/')) {
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throw Object.assign(new Error('只接受图片'), { status: 400 });
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}
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const buf = await readBody(req, cfg.maxUpload);
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if (!buf.length) throw Object.assign(new Error('空文件'), { status: 400 });
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const ext = (safeName(query.get('name')).split('.').pop() || 'png').toLowerCase().slice(0, 6);
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const base = Date.now().toString(36) + '-' + crypto.randomBytes(3).toString('hex');
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const fileName = base + '.' + ext;
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const target = posts.imageTargetDir(query.get('key') || '');
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fs.mkdirSync(target.dir, { recursive: true });
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fs.writeFileSync(path.join(target.dir, fileName), buf);
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return {
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ok: true,
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fileName,
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url: target.bare ? fileName : (target.urlPrefix || '/') + fileName,
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size: buf.length,
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dir: path.relative(cfg.repoRoot, target.dir).split(path.sep).join('/'),
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};
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});
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route('GET', '/git/status', async () => git.status());
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route('POST', '/git/publish', async ({ req }) => {
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const body = await readJson(req);
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const out = await git.publish(body.message);
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if (!out.ok) {
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return { ...out, __status: out.conflict ? 409 : 500 };
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}
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return out;
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});
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route('POST', '/git/sync', async () => {
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const out = await git.sync();
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return out.ok ? out : { ...out, __status: out.conflict ? 409 : 500 };
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});
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// ------------------------------------------------------------------ 分发
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function match(method, pathname) {
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const segs = pathname.split('/').filter(Boolean).map(decodeURIComponent);
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for (const r of routes) {
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if (r.method !== method) continue;
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if (r.segs.length !== segs.length) continue;
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const params = [];
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let ok = true;
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for (let i = 0; i < r.segs.length; i++) {
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if (r.segs[i] === R) params.push(segs[i]);
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else if (r.segs[i] !== segs[i]) {
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ok = false;
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break;
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}
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}
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if (ok) return { handler: r.handler, params };
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}
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return null;
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}
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const server = http.createServer(async (req, res) => {
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const url = new URL(req.url, 'http://localhost');
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try {
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// /health 免鉴权，供健康检查用；其余一律先验令牌
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if (url.pathname === '/health' && req.method === 'GET') {
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json(res, 200, health());
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return;
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}
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// ---------------------------------------------------------- 后台登录
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// 这三个端点免令牌：浏览器直接访问国内机后台时用。密码存 .env，公网只能
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// 通过 nginx 的 /api/v2/admin/* 转发进来；失败限速防爆破。
|
||
if (url.pathname === '/admin/session' && req.method === 'GET') {
|
||
const s = readSession(req);
|
||
if (!s) {
|
||
json(res, 401, { ok: false, mode: 'direct', need_login: true });
|
||
return;
|
||
}
|
||
json(res, 200, { ok: true, mode: 'direct', user: { name: s.user } });
|
||
return;
|
||
}
|
||
|
||
if (url.pathname === '/admin/login' && req.method === 'POST') {
|
||
if (!cfg.adminPass) {
|
||
json(res, 503, { error: '后端未配置登录密码（ADMIN_PASS），请先在 .env 里设置' });
|
||
return;
|
||
}
|
||
const ip = clientIp(req);
|
||
const f = failState(ip);
|
||
if (f && f.until) {
|
||
json(res, 429, { error: '尝试过于频繁，请 ' + Math.ceil((f.until - Date.now()) / 1000) + ' 秒后再试' });
|
||
return;
|
||
}
|
||
const body = await readJson(req, 64 * 1024);
|
||
if (!safeEqual(body.user || '', cfg.adminUser) || !safeEqual(body.password || '', cfg.adminPass)) {
|
||
noteFailure(ip);
|
||
// 不区分「账号错」和「密码错」，别帮对方缩小猜测范围
|
||
json(res, 401, { error: '账号或密码不正确' });
|
||
return;
|
||
}
|
||
failures.delete(ip);
|
||
const sid = crypto.randomBytes(32).toString('hex');
|
||
sessions.set(sid, { user: cfg.adminUser, exp: Date.now() + cfg.sessionTtlMs });
|
||
saveSessions();
|
||
setCookie(res, sid, Math.floor(cfg.sessionTtlMs / 1000));
|
||
json(res, 200, { ok: true, user: { name: cfg.adminUser } });
|
||
return;
|
||
}
|
||
|
||
if (url.pathname === '/admin/logout' && req.method === 'POST') {
|
||
const sid = parseCookies(req)[COOKIE];
|
||
if (sid && sessions.delete(sid)) saveSessions();
|
||
setCookie(res, '', 0);
|
||
json(res, 200, { ok: true });
|
||
return;
|
||
}
|
||
|
||
// ------------------------------------------------------ 一键跳转（免登录）
|
||
// Cloudflare 后台点「国内线路」时走这里：Worker 用共享令牌对时间戳做
|
||
// HMAC 签名，本服务验签通过就直接发会话 Cookie 并 302 到 /admin/。
|
||
// 三重防线：签名只有两边知道 / 时间窗 2 分钟 / 同一签名只用一次。
|
||
if (url.pathname === '/admin/handoff' && req.method === 'GET') {
|
||
const ts = String(url.searchParams.get('ts') || '');
|
||
const sig = String(url.searchParams.get('t') || '');
|
||
const bad = () => {
|
||
res.writeHead(403, { 'Content-Type': 'text/plain; charset=utf-8' });
|
||
res.end('handoff rejected');
|
||
};
|
||
if (!/^\d{13}$/.test(ts) || Math.abs(Date.now() - Number(ts)) > 120_000) return bad();
|
||
const expect = hmacHex(cfg.token, ts);
|
||
if (!expect || !safeEqual(sig, expect)) return bad();
|
||
if (usedHandoff.has(sig)) return bad(); // 防重放：一个签名只能换一次会话
|
||
usedHandoff.add(sig);
|
||
if (usedHandoff.size > 500) usedHandoff.clear(); // 简单兜底，防集合无限涨
|
||
|
||
const sid = crypto.randomBytes(32).toString('hex');
|
||
sessions.set(sid, { user: cfg.adminUser, exp: Date.now() + cfg.sessionTtlMs });
|
||
saveSessions();
|
||
setCookie(res, sid, Math.floor(cfg.sessionTtlMs / 1000));
|
||
res.writeHead(302, { Location: '/admin/' });
|
||
res.end();
|
||
return;
|
||
}
|
||
|
||
// ---------------------------------------------------------- 鉴权
|
||
// 两条通道：Cloudflare Worker 注入的共享令牌（浏览器看不到），
|
||
// 或本机签发的浏览器会话 Cookie。满足其一即放行。
|
||
const byToken = safeEqual(req.headers['x-editor-token'] || '', cfg.token);
|
||
if (!byToken && !readSession(req)) {
|
||
json(res, 401, { error: '未授权', need_login: true });
|
||
return;
|
||
}
|
||
|
||
// 订阅 / 友链：反代到 Cloudflare 上的订阅服务，带上共享令牌。
|
||
// 这样国内机后台也能管订阅，且前端不需要持有订阅口令。
|
||
if (RSS_PATH_PREFIXES.some((p) => url.pathname === p || url.pathname.startsWith(p + '/'))) {
|
||
await rssProxy(req, res, url);
|
||
return;
|
||
}
|
||
|
||
const hit = match(req.method, url.pathname);
|
||
if (!hit) {
|
||
json(res, 404, { error: 'Not Found: ' + req.method + ' ' + url.pathname });
|
||
return;
|
||
}
|
||
|
||
const data = await hit.handler({ req, url, query: url.searchParams, params: hit.params });
|
||
const status = data && data.__status ? data.__status : 200;
|
||
if (data && data.__status) delete data.__status;
|
||
json(res, status, data);
|
||
} catch (e) {
|
||
const status = e.status || 500;
|
||
if (status >= 500) console.error('[editor-api]', req.method, url.pathname, e);
|
||
json(res, status, { error: e.message || '服务端错误' });
|
||
}
|
||
});
|
||
|
||
server.headersTimeout = 30_000;
|
||
server.requestTimeout = 120_000;
|
||
|
||
loadSessions();
|
||
|
||
server.listen(cfg.port, cfg.host, () => {
|
||
console.log('[editor-api] 已启动 http://' + cfg.host + ':' + cfg.port);
|
||
console.log('[editor-api] 仓库 ' + cfg.repoRoot);
|
||
console.log('[editor-api] 分支 ' + cfg.branch + ' 推送远端 ' + cfg.pushRemotes.join(', '));
|
||
console.log('[editor-api] 回收目录 ' + cfg.trashDir);
|
||
console.log(
|
||
'[editor-api] 后台登录 ' +
|
||
(cfg.adminPass
|
||
? '已启用（账号 ' + cfg.adminUser + '，会话 ' + Math.round(cfg.sessionTtlMs / 3600000) + ' 小时，' + sessions.size + ' 个有效会话）'
|
||
: '未配置 ADMIN_PASS —— 只能走 X-Editor-Token')
|
||
);
|
||
});
|