refactor: 重构数据库配置为SQLite开发环境并移除冗余文档

backend/api/middleware/errorHandler.js

@@ -0,0 +1,104 @@
+// 统一错误处理中间件
+const errorHandler = (err, req, res, next) => {
+  // 记录错误日志
+  console.error(`[${new Date().toISOString()}] Error:`, {
+    message: err.message,
+    stack: err.stack,
+    url: req.url,
+    method: req.method,
+    ip: req.ip,
+    userAgent: req.get('User-Agent')
+  });
+
+  // 默认错误响应
+  let statusCode = 500;
+  let message = '服务器内部错误';
+  let code = 'INTERNAL_SERVER_ERROR';
+
+  // 根据错误类型设置响应
+  if (err.name === 'ValidationError') {
+    statusCode = 400;
+    message = '请求参数验证失败';
+    code = 'VALIDATION_ERROR';
+  } else if (err.name === 'UnauthorizedError') {
+    statusCode = 401;
+    message = '未授权访问';
+    code = 'UNAUTHORIZED';
+  } else if (err.name === 'ForbiddenError') {
+    statusCode = 403;
+    message = '禁止访问';
+    code = 'FORBIDDEN';
+  } else if (err.name === 'NotFoundError') {
+    statusCode = 404;
+    message = '资源未找到';
+    code = 'NOT_FOUND';
+  } else if (err.code === 'SQLITE_ERROR') {
+    statusCode = 500;
+    message = '数据库操作失败';
+    code = 'DATABASE_ERROR';
+  }
+
+  // 开发环境下返回详细错误信息
+  const isDevelopment = process.env.NODE_ENV === 'development';
+  
+  res.status(statusCode).json({
+    success: false,
+    message,
+    code,
+    ...(isDevelopment && { 
+      error: err.message,
+      stack: err.stack 
+    })
+  });
+};
+
+// 404处理中间件
+const notFoundHandler = (req, res) => {
+  res.status(404).json({
+    success: false,
+    message: '请求的资源不存在',
+    code: 'NOT_FOUND',
+    path: req.path,
+    method: req.method
+  });
+};
+
+// 请求日志中间件
+const requestLogger = (req, res, next) => {
+  const start = Date.now();
+  
+  // 记录请求开始
+  console.log(`[${new Date().toISOString()}] ${req.method} ${req.url} - ${req.ip}`);
+  
+  // 监听响应结束
+  res.on('finish', () => {
+    const duration = Date.now() - start;
+    console.log(`[${new Date().toISOString()}] ${req.method} ${req.url} - ${res.statusCode} - ${duration}ms`);
+  });
+  
+  next();
+};
+
+// 性能监控中间件
+const performanceMonitor = (req, res, next) => {
+  const start = process.hrtime.bigint();
+  
+  res.on('finish', () => {
+    const end = process.hrtime.bigint();
+    const duration = Number(end - start) / 1000000; // 转换为毫秒
+    
+    // 如果响应时间超过1秒，记录警告
+    if (duration > 1000) {
+      console.warn(`[PERFORMANCE WARNING] ${req.method} ${req.url} took ${duration.toFixed(2)}ms`);
+    }
+  });
+  
+  next();
+};
+
+module.exports = {
+  errorHandler,
+  notFoundHandler,
+  requestLogger,
+  performanceMonitor
+};