初始化

backend/middleware/errorHandler.js

@@ -0,0 +1,62 @@
+/**
+ * 全局错误处理中间件
+ */
+const errorHandler = (err, req, res, next) => {
+  console.error('错误详情:', err);
+  
+  // 默认错误信息
+  let statusCode = 500;
+  let message = 'Internal Server Error';
+  let details = null;
+  
+  // 根据错误类型设置状态码和消息
+  if (err.name === 'ValidationError') {
+    statusCode = 400;
+    message = 'Validation Error';
+    details = err.message;
+  } else if (err.name === 'UnauthorizedError') {
+    statusCode = 401;
+    message = 'Unauthorized';
+  } else if (err.name === 'ForbiddenError') {
+    statusCode = 403;
+    message = 'Forbidden';
+  } else if (err.name === 'NotFoundError') {
+    statusCode = 404;
+    message = 'Not Found';
+  } else if (err.code === 'ENOTFOUND') {
+    statusCode = 503;
+    message = 'Service Unavailable';
+    details = 'Network connection failed';
+  } else if (err.code === 'ECONNREFUSED') {
+    statusCode = 503;
+    message = 'Service Unavailable';
+    details = 'Connection refused';
+  } else if (err.response) {
+    // Axios 错误
+    statusCode = err.response.status || 500;
+    message = err.response.statusText || 'Request Failed';
+    details = err.response.data;
+  } else if (err.message) {
+    message = err.message;
+  }
+  
+  // 构建错误响应
+  const errorResponse = {
+    error: true,
+    message,
+    statusCode,
+    timestamp: new Date().toISOString(),
+    path: req.originalUrl,
+    method: req.method
+  };
+  
+  // 在开发环境下添加详细信息
+  if (process.env.NODE_ENV === 'development') {
+    errorResponse.details = details;
+    errorResponse.stack = err.stack;
+  }
+  
+  res.status(statusCode).json(errorResponse);
+};
+
+module.exports = { errorHandler };