初次提交

middleware/errorHandler.js

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+const { logger } = require('../config/logger');
+const { ERROR_CODES, HTTP_STATUS } = require('../config/constants');
+
+// 全局错误处理中间件
+const errorHandler = (err, req, res, next) => {
+  let error = { ...err };
+  error.message = err.message;
+
+  // 记录错误日志
+  logger.error('Error occurred:', {
+    message: err.message,
+    stack: err.stack,
+    url: req.originalUrl,
+    method: req.method,
+    ip: req.ip,
+    userAgent: req.get('User-Agent'),
+    userId: req.user?.id
+  });
+
+  // MySQL错误处理
+  if (err.code) {
+    switch (err.code) {
+      case 'ER_DUP_ENTRY':
+        error.message = '数据已存在';
+        error.statusCode = HTTP_STATUS.CONFLICT;
+        error.errorCode = ERROR_CODES.DUPLICATE_ENTRY;
+        break;
+      case 'ER_NO_REFERENCED_ROW_2':
+        error.message = '关联数据不存在';
+        error.statusCode = HTTP_STATUS.BAD_REQUEST;
+        error.errorCode = ERROR_CODES.VALIDATION_ERROR;
+        break;
+      case 'ER_ROW_IS_REFERENCED_2':
+        error.message = '数据正在被使用，无法删除';
+        error.statusCode = HTTP_STATUS.CONFLICT;
+        error.errorCode = ERROR_CODES.VALIDATION_ERROR;
+        break;
+      case 'ECONNREFUSED':
+        error.message = '数据库连接失败';
+        error.statusCode = HTTP_STATUS.INTERNAL_SERVER_ERROR;
+        error.errorCode = ERROR_CODES.DATABASE_ERROR;
+        break;
+      default:
+        error.message = '数据库操作失败';
+        error.statusCode = HTTP_STATUS.INTERNAL_SERVER_ERROR;
+        error.errorCode = ERROR_CODES.DATABASE_ERROR;
+    }
+  }
+
+  // JWT错误处理
+  if (err.name === 'JsonWebTokenError') {
+    error.message = '无效的访问令牌';
+    error.statusCode = HTTP_STATUS.UNAUTHORIZED;
+    error.errorCode = ERROR_CODES.AUTHENTICATION_ERROR;
+  }
+
+  if (err.name === 'TokenExpiredError') {
+    error.message = '访问令牌已过期';
+    error.statusCode = HTTP_STATUS.UNAUTHORIZED;
+    error.errorCode = ERROR_CODES.AUTHENTICATION_ERROR;
+  }
+
+  // 参数验证错误
+  if (err.name === 'ValidationError' || err.isJoi) {
+    const message = err.details ? err.details.map(detail => detail.message).join(', ') : err.message;
+    error.message = `参数验证失败: ${message}`;
+    error.statusCode = HTTP_STATUS.BAD_REQUEST;
+    error.errorCode = ERROR_CODES.VALIDATION_ERROR;
+  }
+
+  // 业务逻辑错误处理
+  if (err.message === '余额不足') {
+    error.message = '用户积分余额不足，无法完成转账操作。请先为用户充值积分或选择其他用户。';
+    error.statusCode = HTTP_STATUS.BAD_REQUEST;
+    error.errorCode = ERROR_CODES.VALIDATION_ERROR;
+  }
+
+  if (err.message === '用户不存在') {
+    error.message = '指定的用户不存在，请检查用户信息后重试。';
+    error.statusCode = HTTP_STATUS.BAD_REQUEST;
+    error.errorCode = ERROR_CODES.VALIDATION_ERROR;
+  }
+
+  // 自定义错误
+  if (err.statusCode) {
+    error.statusCode = err.statusCode;
+    error.errorCode = err.errorCode || ERROR_CODES.INTERNAL_ERROR;
+  }
+
+  // 默认错误
+  const statusCode = error.statusCode || HTTP_STATUS.INTERNAL_SERVER_ERROR;
+  const errorCode = error.errorCode || ERROR_CODES.INTERNAL_ERROR;
+  const message = error.message || '服务器内部错误';
+
+  res.status(statusCode).json({
+    success: false,
+    error: {
+      code: errorCode,
+      message: message
+    },
+    ...(process.env.NODE_ENV === 'development' && { stack: err.stack })
+  });
+};
+
+// 404错误处理
+const notFound = (req, res, next) => {
+  const error = new Error(`路径 ${req.originalUrl} 未找到`);
+  error.statusCode = HTTP_STATUS.NOT_FOUND;
+  error.errorCode = ERROR_CODES.NOT_FOUND;
+  next(error);
+};
+
+// 自定义错误类
+class AppError extends Error {
+  constructor(message, statusCode, errorCode) {
+    super(message);
+    this.statusCode = statusCode;
+    this.errorCode = errorCode;
+    this.isOperational = true;
+
+    Error.captureStackTrace(this, this.constructor);
+  }
+}
+
+module.exports = {
+  errorHandler,
+  notFound,
+  AppError
+};