commit a472949064e770d06765f98c895cca2ef75144ec Author: Snowz <372492339@qq.com> Date: Sat Nov 22 00:39:55 2025 +0800 chore: 更新依赖模块的配置和类型定义文件 更新多个依赖模块的配置文件、类型定义文件和测试文件,包括添加新的类型定义、调整构建配置和更新测试用例。主要涉及dotenv、debug、axios等常用模块的维护性更新。 diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..9b34b70 --- /dev/null +++ b/.gitignore @@ -0,0 +1,8 @@ +node_modules +.env +.env.local +.npm +.yarn/ +dist/ +build/ +*.log \ No newline at end of file diff --git a/README.md b/README.md new file mode 100644 index 0000000..40a8bbf --- /dev/null +++ b/README.md @@ -0,0 +1,101 @@ +# Asset Cache Server(CSS/JS 永久缓存服务) + +一个用于将外部 CSS/JS 资源永久缓存到本地并通过自有域名提供静态访问的 Node 服务。支持上传 TXT 批量抓取、按原 URL 目录层级保存、去重跳过、返回可直接引用的公共路径与完整 URL,适配 Windows / Debian 部署,适合与 CDN 防盗链配合使用。 + +## 特性 + +- 保留原始目录层级:按源 URL 路径保存到 `cache/css` 或 `cache/js` 下 +- 去重缓存:同一路径已存在则跳过抓取并返回 `skipped: true` +- 统一静态访问:通过 `/css/...` 与 `/js/...` 直接访问,设置长缓存头 +- 批量抓取:支持上传 TXT(每行一个 URL)或一次提交多条 URL +- 结果即用:API 返回 `saved`(公共路径)与 `accessUrl`(完整 URL) +- 环境配置:支持 `.env` 设置 `PORT`,适配反向代理与不同端口 +- 路径安全:剔除 `..` 等越权片段,写入校验不越出缓存根 + +## 原理与代码位置 + +- 目录与类型解析:`server.js:42`(`resolveTargetPath`) +- 抓取与去重:`server.js:133`(`fetchAndStore`) +- TXT 解析与批量:`server.js:164`、`server.js:176` +- 静态目录映射:`server.js:192`–`server.js:193` +- 公共路径与完整 URL:`server.js:107`(`getPublicPath`)、`server.js:121`(`buildAccessUrl`) + +## 快速开始 + +- 安装依赖:`npm install` +- 设置端口(任选其一): + - 在 `.env` 中写入:`PORT=11488` + - Windows 启动前:`$env:PORT=11488; npm start` + - Linux/systemd/pm2:在进程配置里设置环境变量 `PORT` +- 启动服务:`npm start` +- 健康检查:`GET /health` → `{"ok":true}` + +## 接口说明 + +- `POST /api/upload-txt` + - 上传 TXT(字段名 `file`),每行一个 URL;支持 `#` 注释与空行 + - 响应项示例: + - `{ + "url": "https://cdn.jsdmirror.com/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css", + "saved": "/css/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css", + "accessUrl": "https://<你的域名>/css/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css", + "filename": "bootstrap.min.css", + "type": "css", + "size": 232914, + "skipped": false + }` + +- `POST /api/cache` + - 提交单条 `url` 或数组 `urls` + - 单条示例:`{"url":"https://.../bootstrap.min.css"}` + - 多条示例:`{"urls":["https://.../bootstrap.min.css","https://.../bootstrap.bundle.min.js"]}` + +- `GET /api/seed` + - 从项目内置 `seed.txt` 读取并批量抓取,无需重启 + +## 静态访问 + +- CSS:`/css/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css` +- JS:`/js/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js` + +## 保存规则与目录结构 + +- 路径规则:按原 URL 路径层级保存到 `cache/css` 或 `cache/js` + - 原地址:`https://cdn.jsdmirror.com/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css` + - 本地保存:`cache/css/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css` + - 对外访问:`/css/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css` +- 类型判定:优先扩展名(`.css`/`.js`),其次 `Content-Type` +- 安全加固:移除 `..` 等越权片段,写入前校验不越界(`server.js:65` 起) + +## 去重策略 + +- 目标路径存在则跳过抓取,响应中返回 `skipped: true` +- 强制刷新:删除对应缓存文件后再次触发抓取 + +## 安全与白名单建议 + +- 推荐在 CDN/WAF 层配置防盗链白名单(如 `*.aaa.com`、`www.bbb.com`) +- 如需更强控制可扩展签名 URL 校验(服务端或边缘验证令牌) + +## 部署建议 + +- Windows(开发/测试):`npm install && $env:PORT=11488; npm start` +- Debian 12 / Node 22.19.0(生产): + - 创建 `.env` 设置端口:`PORT=<你的端口>` + - `npm install && npm start` + - 建议使用 systemd/pm2 守护进程,并在 Nginx 反向代理到 `127.0.0.1:` + +## 常见问题(FAQ) + +- 修改 `seed.txt` 是否需要重启?不需要,`GET /api/seed` 会重新读取。 +- 同名文件内容更新如何刷新?删除旧缓存文件后再触发,或用带版本号的 URL。 +- 端口为何不是 3000?端口读取自环境变量 `PORT`,可通过 `.env` 或进程管理器设置。 + +## 变更记录(摘要) + +- 增强目录层级映射与路径安全加固(越权剔除、根校验) +- 内置 `seed.txt` 与 `GET /api/seed`(无需重启) +- 去重逻辑(已存在则跳过,返回 `skipped: true`) +- `.env` 支持(`PORT`),适配多端口部署 +- 接口响应统一返回公共路径 `saved` 与完整 URL `accessUrl` +- 依赖升级:`express@^5.1.0`、`multer@^2.0.2`、`axios@^1.13.2`、`morgan@^1.10.1` \ No newline at end of file diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..d3e0727 --- /dev/null +++ b/package-lock.json @@ -0,0 +1,1433 @@ +{ + "name": "asset-cache-server", + "version": "1.0.0", + "lockfileVersion": 3, + "requires": true, + "packages": { + "": { + "name": "asset-cache-server", + "version": "1.0.0", + "dependencies": { + "axios": 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+1,299 @@ +import 'dotenv/config' +import express from 'express' +import axios from 'axios' +import morgan from 'morgan' +import multer from 'multer' +import fs from 'fs' +import path from 'path' +import { fileURLToPath } from 'url' + +const __filename = fileURLToPath(import.meta.url) +const __dirname = path.dirname(__filename) + +const app = express() +const upload = multer({ storage: multer.memoryStorage(), limits: { fileSize: 5 * 1024 * 1024 } }) +const PORT = Number(process.env.PORT || 3000) +const CACHE_ROOT = path.join(__dirname, 'cache') +const CSS_DIR = path.join(CACHE_ROOT, 'css') +const JS_DIR = path.join(CACHE_ROOT, 'js') +const SEED_FILE = path.join(__dirname, 'seed.txt') + +// 中间件 +app.use(express.json({ limit: '2mb' })) +app.use(morgan('tiny')) +app.set('trust proxy', true) + +/** + * 创建必要的缓存目录 + * @returns {void} + */ +function ensureCacheDirs() { + if (!fs.existsSync(CACHE_ROOT)) fs.mkdirSync(CACHE_ROOT) + if (!fs.existsSync(CSS_DIR)) fs.mkdirSync(CSS_DIR) + if (!fs.existsSync(JS_DIR)) fs.mkdirSync(JS_DIR) +} + +/** + * 从URL和内容类型判断目标保存路径与文件名(保留原URL目录层级) + * @param {string} urlStr 请求的URL + * @param {string|undefined} contentType 响应的Content-Type + * @returns {{fullPath:string, folder:string, filename:string}} + */ +function resolveTargetPath(urlStr, contentType) { + const u = new URL(urlStr) + let base = path.basename(u.pathname) + if (!base || base === '/') base = 'index' + const ext = path.extname(base).toLowerCase() + + let folder + let type + if (ext === '.css') folder = CSS_DIR + else if (ext === '.js') folder = JS_DIR + else if (contentType) { + const ct = (contentType || '').split(';')[0].trim() + if (ct === 'text/css') folder = CSS_DIR + else folder = JS_DIR + } else { + folder = JS_DIR + } + + if (ext === '.css') type = 'css' + else if (ext === '.js') type = 'js' + else if ((contentType || '').split(';')[0].trim() === 'text/css') type = 'css' + else type = 'js' + + // 按原URL路径的目录层级保存:/npm/bootstrap@5.3.0/dist/css → 子目录 + let subDir = path.dirname(u.pathname) + if (subDir === '/' || subDir === '.') subDir = '' + // 去掉URL起始斜杠与反斜杠,并剔除越权片段 + const raw = subDir.replace(/^\/+/, '').replace(/\\+/g, '/') + const safeParts = raw + .split('/') + .filter(p => p && p !== '..') + const normalized = safeParts.join('/') + const targetDir = normalized ? path.join(folder, normalized) : folder + + let fullPath = path.join(targetDir, base) + // 防越权:若解析后不在目标根内,回退到根目录 + const resolved = path.resolve(fullPath) + const rootResolved = path.resolve(folder) + if (!resolved.startsWith(rootResolved)) { + fullPath = path.join(rootResolved, base) + } + return { fullPath, folder: targetDir, filename: base, type } +} + +/** + * 从URL提取并净化子目录(与保存逻辑一致),用于构造公开访问路径 + * @param {string} urlStr 远程资源URL + * @returns {string} 规范化子目录(可能为空字符串) + */ +function sanitizeSubdirFromUrl(urlStr) { + const u = new URL(urlStr) + let subDir = path.dirname(u.pathname) + if (subDir === '/' || subDir === '.') subDir = '' + const raw = subDir.replace(/^\/+/, '').replace(/\\+/g, '/') + const safeParts = raw.split('/').filter(p => p && p !== '..') + return safeParts.join('/') +} + +/** + * 计算公开路径(/css 或 /js 下的相对路径) + * @param {string} urlStr 远程资源URL + * @param {'css'|'js'} type 资源类型 + * @param {string} filename 保存的文件名 + * @returns {string} 相对公开路径,如 /css/npm/.../file.css + */ +function getPublicPath(urlStr, type, filename) { + const prefix = type === 'css' ? '/css' : '/js' + const sub = sanitizeSubdirFromUrl(urlStr) + return sub ? `${prefix}/${sub}/${filename}` : `${prefix}/${filename}` +} + +/** + * 构造完整可访问URL(含协议与主机) + * @param {import('express').Request} req 请求对象 + * @param {string} urlStr 源URL + * @param {'css'|'js'} type 类型 + * @param {string} filename 文件名 + * @returns {string} 完整URL + */ +function buildAccessUrl(req, urlStr, type, filename) { + const host = req.get('host') + const proto = req.protocol + const rel = getPublicPath(urlStr, type, filename) + return `${proto}://${host}${rel}` +} + +/** + * 抓取远程文件并保存到本地缓存目录(带去重) + * @param {string} urlStr 远程资源URL + * @returns {Promise<{url:string, saved:string, size:number, type:'css'|'js', skipped:boolean}>} + */ +async function fetchAndStore(urlStr) { + // 先按扩展名推导目标路径,若文件已存在则跳过抓取 + const pre = resolveTargetPath(urlStr, undefined) + if (fs.existsSync(pre.fullPath)) { + const stat = fs.statSync(pre.fullPath) + return { url: urlStr, saved: pre.filename, size: stat.size, type: pre.type, skipped: true } + } + + const response = await axios.get(urlStr, { + responseType: 'arraybuffer', + timeout: 20000, + headers: { + 'User-Agent': 'AssetCache/1.0', + 'Accept': 'text/css, application/javascript, */*' + } + }) + + const contentType = response.headers['content-type'] || '' + const { fullPath, folder, filename, type } = resolveTargetPath(urlStr, contentType) + if (!fs.existsSync(folder)) fs.mkdirSync(folder, { recursive: true }) + + fs.writeFileSync(fullPath, Buffer.from(response.data)) + const stat = fs.statSync(fullPath) + return { url: urlStr, saved: filename, size: stat.size, type, skipped: false } +} + +/** + * 解析TXT文本内容为URL列表 + * @param {string} txt TXT文件内容 + * @returns {string[]} + */ +function parseTxtToUrls(txt) { + return txt + .split(/\r?\n/) + .map(s => s.trim()) + .filter(s => s.length > 0 && !s.startsWith('#')) +} + +/** + * 批量抓取URL列表并返回结果 + * @param {string[]} urls URL数组 + * @returns {Promise>} + */ +async function batchFetch(urls) { + const results = [] + for (const url of urls) { + try { + const r = await fetchAndStore(url) + results.push(r) + } catch (err) { + results.push({ url, saved: '', size: 0, type: 'js', skipped: false, error: err.message }) + } + } + return results +} + +ensureCacheDirs() + +// 静态服务:/css 与 /js 直接映射到缓存目录 +app.use('/css', express.static(CSS_DIR, { maxAge: '365d', immutable: true })) +app.use('/js', express.static(JS_DIR, { maxAge: '365d', immutable: true })) + +// 健康检查 +app.get('/health', (req, res) => { + res.json({ ok: true }) +}) + +// 上传TXT:multipart/form-data,字段名为 file +app.post('/api/upload-txt', upload.single('file'), async (req, res) => { + try { + if (!req.file) return res.status(400).json({ error: '缺少TXT文件字段: file' }) + const txt = req.file.buffer.toString('utf8') + const urls = parseTxtToUrls(txt) + if (urls.length === 0) return res.status(400).json({ error: 'TXT未包含有效URL' }) + const results = await batchFetch(urls) + const mapped = results.map(r => ({ + url: r.url, + saved: r.saved ? getPublicPath(r.url, r.type, r.saved) : '', + accessUrl: r.saved ? buildAccessUrl(req, r.url, r.type, r.saved) : '', + size: r.size, + type: r.type, + skipped: r.skipped, + error: r.error, + filename: r.saved + })) + res.json({ count: mapped.length, results: mapped }) + } catch (e) { + res.status(500).json({ error: e.message }) + } +}) + +// 直接提交URL或URL列表 +app.post('/api/cache', async (req, res) => { + try { + const { url, urls } = req.body || {} + if (url) { + const r = await fetchAndStore(url) + const publicPath = r.saved ? getPublicPath(r.url, r.type, r.saved) : '' + const accessUrl = r.saved ? buildAccessUrl(req, r.url, r.type, r.saved) : '' + return res.json({ + url: r.url, + saved: publicPath, + accessUrl, + size: r.size, + type: r.type, + skipped: r.skipped, + filename: r.saved + }) + } + if (Array.isArray(urls) && urls.length > 0) { + const results = await batchFetch(urls) + const mapped = results.map(r => ({ + url: r.url, + saved: r.saved ? getPublicPath(r.url, r.type, r.saved) : '', + accessUrl: r.saved ? buildAccessUrl(req, r.url, r.type, r.saved) : '', + size: r.size, + type: r.type, + skipped: r.skipped, + error: r.error, + filename: r.saved + })) + return res.json({ count: mapped.length, results: mapped }) + } + res.status(400).json({ error: '请提供 url 或 urls' }) + } catch (e) { + res.status(500).json({ error: e.message }) + } +}) + +/** + * 从项目内置 seed.txt 加载URL并执行批量缓存 + * @returns {Promise<{count:number, results:any[]}>} + */ +async function runSeedFromFile() { + if (!fs.existsSync(SEED_FILE)) { + return { count: 0, results: [] } + } + const txt = fs.readFileSync(SEED_FILE, 'utf8') + const urls = parseTxtToUrls(txt) + if (urls.length === 0) return { count: 0, results: [] } + const results = await batchFetch(urls) + return { count: results.length, results } +} + +// 触发内置seed.txt抓取 +app.get('/api/seed', async (req, res) => { + try { + const r = await runSeedFromFile() + const mapped = (r.results || []).map(x => ({ + url: x.url, + saved: x.saved ? getPublicPath(x.url, x.type, x.saved) : '', + accessUrl: x.saved ? 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