From f125ce98c9474050984b1f05388bca5ace355ebf Mon Sep 17 00:00:00 2001 From: Cxx0822 <1556464090@qq.com> Date: Sat, 14 Feb 2026 10:41:36 +0800 Subject: [PATCH] =?UTF-8?q?feat:=E5=A2=9E=E5=8A=A0=E6=9B=B4=E6=94=B9?= =?UTF-8?q?=E5=9B=BE=E7=89=87=E5=A4=A7=E5=B0=8F=E5=8A=9F=E8=83=BD?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- Dockerfile | 2 +- app.js | 64 ++-- package-lock.json | 749 +--------------------------------------------- package.json | 1 + utils.js | 77 +++++ 5 files changed, 103 insertions(+), 790 deletions(-) create mode 100644 utils.js diff --git a/Dockerfile b/Dockerfile index 1827bfd..0acf629 100644 --- a/Dockerfile +++ b/Dockerfile @@ -3,7 +3,7 @@ WORKDIR /app RUN npm config set registry https://registry.npmmirror.com/ COPY package*.json ./ RUN npm install --production -COPY app.js . +COPY . . RUN mkdir -p /app/images EXPOSE 3000 ENV IMAGE_BASE_DIR=/app/images diff --git a/app.js b/app.js index ea074ea..200fe54 100644 --- a/app.js +++ b/app.js @@ -1,38 +1,17 @@ +require('dotenv').config(); + const http = require('http'); const url = require('url'); const path = require('path'); const fs = require('fs'); -const sharp = require('sharp'); +const {sendResponse, isSafePath, processImage} = require("./utils"); const PORT = process.env.PORT || 3000; const IMAGE_BASE_DIR = process.env.IMAGE_BASE_DIR || '/app/images'; -/** - * 安全检查：防止路径遍历攻击（如 ../../etc/passwd） - * @param {string} targetPath 目标文件路径 - * @param {string} baseDir 基础目录 - * @returns {boolean} 是否合法 - */ -function isSafePath(targetPath, baseDir) { - const resolvedTarget = path.resolve(targetPath).toLowerCase(); - const resolvedBase = path.resolve(baseDir).toLowerCase(); - return resolvedTarget.startsWith(resolvedBase); -} - -/** - * 发送错误响应 - * @param {http.ServerResponse} res 响应对象 - * @param {number} statusCode 状态码 - * @param {string} message 错误信息 - */ -function sendError(res, statusCode, message) { - res.writeHead(statusCode, { 'Content-Type': 'text/plain; charset=utf-8' }); - res.end(message); -} - const server = http.createServer(async (req, res) => { if (req.method !== 'GET') { - return sendError(res, 405, '仅支持GET请求'); + return sendResponse(res, 405, '仅支持GET请求'); } try { @@ -42,13 +21,7 @@ const server = http.createServer(async (req, res) => { // 过滤根路径请求（避免直接访问服务根目录） if (requestPath === '/') { - return sendError(res, 200, ` - 图片处理服务已启动！ - 使用示例： - 1. 访问原图片：http://localhost:${PORT}/a/b/c.png - 2. 调整质量：http://localhost:${PORT}/a/b/c.png?q=80 - 图片基础目录：${IMAGE_BASE_DIR} - `); + return sendResponse(res, 200, '图片处理服务已启动！'); } const requestedFilePath = requestPath.slice(1); @@ -56,42 +29,39 @@ const server = http.createServer(async (req, res) => { // 安全检查：防止路径遍历 if (!isSafePath(fullImagePath, IMAGE_BASE_DIR)) { - return sendError(res, 403, '访问拒绝：非法路径（路径遍历攻击）'); + return sendResponse(res, 403, '访问拒绝：非法路径（路径遍历攻击）'); } if (!fs.existsSync(fullImagePath)) { - return sendError(res, 404, `图片不存在：${requestedFilePath}`); + return sendResponse(res, 404, `图片不存在：${requestedFilePath}`); } - if (!query.q) { + // 如果没有压缩参数，直接返回原图 + if (!query.q && !query.w && !query.width && !query.h && !query.height) { const fileStream = fs.createReadStream(fullImagePath); - const ext = path.extname(fullImagePath).slice(1); // 如 png/jpg - res.writeHead(200, { 'Content-Type': `image/${ext}` }); + const ext = path.extname(fullImagePath).slice(1); + res.writeHead(200, {'Content-Type': `image/${ext}`}); // 流式传输文件（适合大文件） fileStream.pipe(res); fileStream.on('error', (err) => { - sendError(res, 500, `读取文件失败：${err.message}`); + sendResponse(res, 500, `读取文件失败：${err.message}`); }); return; } - const quality = parseInt(query.q); - if (isNaN(quality)) { - return sendError(res, 400, '质量参数q必须是数字（1-100）'); - } - const finalQuality = Math.max(1, Math.min(100, quality)); - - const imageBuffer = await sharp(fullImagePath).rotate().jpeg({ quality: finalQuality }).toBuffer(); + // 处理图片压缩和调整大小 + const imageBuffer = await processImage(fullImagePath, query); res.writeHead(200, { 'Content-Type': 'image/jpeg', - 'Content-Length': imageBuffer.length + 'Content-Length': imageBuffer.length, + 'Cache-Control': 'public, max-age=86400' // 缓存1天 }); res.end(imageBuffer); } catch (error) { console.error('服务器异常：', error); - sendError(res, 500, `服务器内部错误：${error.message}`); + sendResponse(res, 500, `服务器内部错误：${error.message}`); } }); diff --git a/package-lock.json b/package-lock.json index f754a47..8b78e66 100644 --- a/package-lock.json +++ b/package-lock.json @@ -9,7 +9,7 @@ "version": "1.0.0", "license": "ISC", "dependencies": { - "express": "^5.2.1", + "dotenv": "^17.3.1", "sharp": "^0.34.5" } }, @@ -462,136 +462,6 @@ "url": "https://opencollective.com/libvips" } }, - "node_modules/accepts": { - "version": "2.0.0", - "resolved": "https://registry.npmmirror.com/accepts/-/accepts-2.0.0.tgz", - "integrity": "sha512-5cvg6CtKwfgdmVqY1WIiXKc3Q1bkRqGLi+2W/6ao+6Y7gu/RCwRuAhGEzh5B4KlszSuTLgZYuqFqo5bImjNKng==", - "dependencies": { - "mime-types": "^3.0.0", - "negotiator": "^1.0.0" - }, - "engines": { - "node": ">= 0.6" - 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Math.max(1, Math.min(100, parseInt(query.q))) : + Math.round(compressOptions.quality * 100); + const finalQuality = Math.max(1, Math.min(100, quality)); + + // 转换为JPEG格式并压缩 + return sharpInstance.jpeg({quality: finalQuality, mozjpeg: true}).toBuffer(); +} + +module.exports = { + isSafePath, + sendResponse, + processImage +}