完成v1.1.0

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Falck
2026-04-25 15:48:07 +08:00
parent 0cdc07b3ec
commit 979d2e2236
27 changed files with 5175 additions and 0 deletions

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/**
* 性能优化中间件
*/
/**
* 响应时间头中间件
* 添加X-Response-Time头到响应中
*/
function responseTime(req, res, next) {
const start = Date.now();
// 保存原始的 end 方法
const originalEnd = res.end;
// 重写 end 方法以在响应发送前设置头部
res.end = function(...args) {
const duration = Date.now() - start;
// 只有在头部尚未发送时才能设置
if (!res.headersSent) {
res.setHeader('X-Response-Time', `${duration}ms`);
}
// 记录慢响应
if (duration > 1000) {
console.warn(`慢响应: ${req.method} ${req.url} - ${duration}ms`);
}
// 调用原始的 end 方法
return originalEnd.apply(this, args);
};
next();
}
/**
* 压缩中间件
* 已经使用compression这里添加额外的压缩头
*/
function compressionHeaders(req, res, next) {
// 为文本资源启用压缩
if (req.url.match(/\.(html|css|js|json|xml)$/)) {
res.setHeader('Vary', 'Accept-Encoding');
}
next();
}
/**
* 缓存控制中间件
*/
function cacheControl(req, res, next) {
// 静态资源缓存策略
if (req.url.match(/\.(css|js|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$/)) {
// 静态资源缓存1年
res.setHeader('Cache-Control', 'public, max-age=31536000, immutable');
} else if (req.url.match(/\.(html)$/)) {
// HTML文件不缓存
res.setHeader('Cache-Control', 'no-cache, no-store, must-revalidate');
} else {
// 默认缓存策略
res.setHeader('Cache-Control', 'no-cache');
}
next();
}
/**
* 安全头中间件
*/
function securityHeaders(req, res, next) {
// 防止MIME类型嗅探
res.setHeader('X-Content-Type-Options', 'nosniff');
// 防止点击劫持
res.setHeader('X-Frame-Options', 'DENY');
// XSS保护
res.setHeader('X-XSS-Protection', '1; mode=block');
// 推荐使用HTTPS
res.setHeader('Strict-Transport-Security', 'max-age=31536000; includeSubDomains');
// 内容安全策略
const csp = [
"default-src 'self'",
"script-src 'self' 'unsafe-inline' https://cdnjs.cloudflare.com https://fonts.googleapis.com",
"style-src 'self' 'unsafe-inline' https://cdnjs.cloudflare.com https://fonts.googleapis.com",
"font-src 'self' https://cdnjs.cloudflare.com https://fonts.gstatic.com",
"img-src 'self' data: https:",
"connect-src 'self'",
"frame-ancestors 'none'",
"base-uri 'self'",
"form-action 'self'"
].join('; ');
res.setHeader('Content-Security-Policy', csp);
next();
}
/**
* Gzip预压缩中间件
* 检查是否存在预压缩的.gz文件
*/
function gzipStatic(req, res, next) {
const acceptEncoding = req.headers['accept-encoding'] || '';
if (acceptEncoding.includes('gzip') && req.url.match(/\.(js|css|html|json)$/)) {
req.url = req.url + '.gz';
res.setHeader('Content-Encoding', 'gzip');
// 设置正确的Content-Type
if (req.url.endsWith('.js.gz')) {
res.setHeader('Content-Type', 'application/javascript');
} else if (req.url.endsWith('.css.gz')) {
res.setHeader('Content-Type', 'text/css');
} else if (req.url.endsWith('.html.gz')) {
res.setHeader('Content-Type', 'text/html');
}
}
next();
}
/**
* 请求限流中间件(简单版本)
*/
function rateLimiter(maxRequests = 100, windowMs = 15 * 60 * 1000) {
const requests = new Map();
return function(req, res, next) {
const ip = req.ip || req.connection.remoteAddress;
const now = Date.now();
if (!requests.has(ip)) {
requests.set(ip, []);
}
const timestamps = requests.get(ip);
// 清理过期的请求记录
const windowStart = now - windowMs;
while (timestamps.length && timestamps[0] < windowStart) {
timestamps.shift();
}
// 检查是否超过限制
if (timestamps.length >= maxRequests) {
res.status(429).json({
error: '请求过多',
message: '请稍后再试'
});
return;
}
// 记录当前请求
timestamps.push(now);
// 设置限流头
res.setHeader('X-RateLimit-Limit', maxRequests);
res.setHeader('X-RateLimit-Remaining', maxRequests - timestamps.length);
res.setHeader('X-RateLimit-Reset', Math.ceil((timestamps[0] + windowMs) / 1000));
next();
};
}
/**
* 数据库查询优化中间件(示例)
*/
function queryOptimizer(req, res, next) {
// 这里可以添加数据库查询优化逻辑
// 例如:限制查询结果数量、添加索引提示等
// 示例为API请求添加默认分页
if (req.path.startsWith('/api/') && req.method === 'GET') {
req.query.limit = req.query.limit || '50';
req.query.offset = req.query.offset || '0';
}
next();
}
/**
* 内存使用监控
*/
function memoryMonitor(req, res, next) {
const memoryUsage = process.memoryUsage();
// 记录高内存使用
if (memoryUsage.heapUsed > 500 * 1024 * 1024) { // 500MB
console.warn('高内存使用:', {
heapUsed: Math.round(memoryUsage.heapUsed / 1024 / 1024) + 'MB',
heapTotal: Math.round(memoryUsage.heapTotal / 1024 / 1024) + 'MB',
rss: Math.round(memoryUsage.rss / 1024 / 1024) + 'MB',
url: req.url
});
}
// 添加内存使用头(仅开发环境)
if (process.env.NODE_ENV === 'development') {
res.setHeader('X-Memory-Usage', Math.round(memoryUsage.heapUsed / 1024 / 1024) + 'MB');
}
next();
}
module.exports = {
responseTime,
compressionHeaders,
cacheControl,
securityHeaders,
gzipStatic,
rateLimiter,
queryOptimizer,
memoryMonitor
};