218 lines
7.2 KiB
JavaScript
218 lines
7.2 KiB
JavaScript
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/**
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* v2 API 统一错误码系统
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*
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* 设计原则：
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* - code: 0 表示成功（与 HTTP 状态码解耦）
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* - 非零 code 表示失败，按模块分段
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* - 兼容 v1（code: 200 = 成功），通过 v2 响应头区分版本
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*
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* 错误码分段：
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* 0 — 成功
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* 1xxx — 通用错误（参数/鉴权/权限/限流）
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* 2xxx — 用户模块
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* 3xxx — 商品模块
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* 4xxx — 订单模块
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* 5xxx — 购物车模块
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* 6xxx — 库存模块
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* 7xxx — 退款模块
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* 8xxx — 积分模块
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* 9xxx — 其他模块
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*/
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// ============ 通用错误码 1xxx ============
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const SUCCESS = 0
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const ERR_BAD_REQUEST = 1000 // 请求参数错误
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const ERR_UNAUTHORIZED = 1001 // 未登录/Token 无效
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const ERR_FORBIDDEN = 1002 // 无权限
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const ERR_NOT_FOUND = 1003 // 资源不存在
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const ERR_CONFLICT = 1004 // 资源冲突
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const ERR_RATE_LIMIT = 1005 // 请求过于频繁
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const ERR_INTERNAL = 1006 // 服务器内部错误
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const ERR_VALIDATION = 1007 // 数据校验失败
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const ERR_DEPRECATED = 1008 // 接口已废弃
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// ============ 用户模块 2xxx ============
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const ERR_USER_NOT_FOUND = 2001
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const ERR_USER_PASSWORD = 2002 // 密码错误
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const ERR_USER_DISABLED = 2003 // 账号已禁用
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const ERR_USER_EXISTS = 2004 // 用户已存在
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const ERR_USER_PHONE_INVALID = 2005
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// ============ 商品模块 3xxx ============
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const ERR_GOODS_NOT_FOUND = 3001
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const ERR_GOODS_OFF_SHELF = 3002 // 商品已下架
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const ERR_GOODS_STOCK_LOW = 3003 // 库存不足
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const ERR_GOODS_NAME_DUPLICATE = 3004
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// ============ 订单模块 4xxx ============
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const ERR_ORDER_NOT_FOUND = 4001
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const ERR_ORDER_STATUS = 4002 // 订单状态不允许此操作
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const ERR_ORDER_EMPTY = 4003 // 订单为空
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const ERR_ORDER_CANNOT_CANCEL = 4004
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// ============ 购物车模块 5xxx ============
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const ERR_CART_ITEM_NOT_FOUND = 5001
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const ERR_CART_QUANTITY_INVALID = 5002
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const ERR_CART_GOODS_OFF_SHELF = 5003
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// ============ 库存模块 6xxx ============
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const ERR_STOCK_NEGATIVE = 6001 // 库存不能为负
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const ERR_STOCK_LOG_NOT_FOUND = 6002
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// ============ 退款模块 7xxx ============
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const ERR_REFUND_NOT_FOUND = 7001
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const ERR_REFUND_AMOUNT_INVALID = 7002
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const ERR_REFUND_DUPLICATE = 7003 // 已有待处理退款
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const ERR_REFUND_STATUS = 7004 // 退款状态不允许此操作
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// ============ 积分模块 8xxx ============
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const ERR_POINTS_INSUFFICIENT = 8001
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const ERR_POINTS_GOODS_NOT_FOUND = 8002
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const ERR_POINTS_GOODS_OFF_SHELF = 8003
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const ERR_POINTS_GOODS_NO_STOCK = 8004
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const ERR_POINTS_DELTA_EXCEED = 8005 // 积分变动超限
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// ============ 错误码映射表 ============
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const ERROR_MESSAGES = {
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[SUCCESS]: 'success',
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[ERR_BAD_REQUEST]: '请求参数错误',
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[ERR_UNAUTHORIZED]: '未登录或登录已过期',
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[ERR_FORBIDDEN]: '无权限访问',
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[ERR_NOT_FOUND]: '资源不存在',
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[ERR_CONFLICT]: '资源冲突',
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[ERR_RATE_LIMIT]: '请求过于频繁，请稍后再试',
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[ERR_INTERNAL]: '服务器内部错误',
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[ERR_VALIDATION]: '数据校验失败',
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[ERR_DEPRECATED]: '接口已废弃',
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[ERR_USER_NOT_FOUND]: '用户不存在',
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[ERR_USER_PASSWORD]: '密码错误',
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[ERR_USER_DISABLED]: '账号已禁用',
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[ERR_USER_EXISTS]: '用户已存在',
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[ERR_USER_PHONE_INVALID]: '手机号格式错误',
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[ERR_GOODS_NOT_FOUND]: '商品不存在',
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[ERR_GOODS_OFF_SHELF]: '商品已下架',
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[ERR_GOODS_STOCK_LOW]: '库存不足',
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[ERR_GOODS_NAME_DUPLICATE]: '商品名称已存在',
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[ERR_ORDER_NOT_FOUND]: '订单不存在',
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[ERR_ORDER_STATUS]: '订单状态不允许此操作',
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[ERR_ORDER_EMPTY]: '订单为空',
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[ERR_ORDER_CANNOT_CANCEL]: '订单无法取消',
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[ERR_CART_ITEM_NOT_FOUND]: '购物车商品不存在',
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[ERR_CART_QUANTITY_INVALID]: '数量无效',
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[ERR_CART_GOODS_OFF_SHELF]: '商品已下架',
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[ERR_STOCK_NEGATIVE]: '库存不能为负数',
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[ERR_STOCK_LOG_NOT_FOUND]: '库存记录不存在',
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[ERR_REFUND_NOT_FOUND]: '退款申请不存在',
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[ERR_REFUND_AMOUNT_INVALID]: '退款金额无效',
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[ERR_REFUND_DUPLICATE]: '已有待处理的退款申请',
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[ERR_REFUND_STATUS]: '退款状态不允许此操作',
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[ERR_POINTS_INSUFFICIENT]: '积分不足',
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[ERR_POINTS_GOODS_NOT_FOUND]: '积分商品不存在',
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[ERR_POINTS_GOODS_OFF_SHELF]: '积分商品已下架',
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[ERR_POINTS_GOODS_NO_STOCK]: '积分商品库存不足',
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[ERR_POINTS_DELTA_EXCEED]: '积分变动超出允许范围',
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}
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// ============ v1 错误码 → v2 映射 ============
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const V1_TO_V2_MAP = {
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200: SUCCESS,
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400: ERR_BAD_REQUEST,
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401: ERR_UNAUTHORIZED,
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403: ERR_FORBIDDEN,
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404: ERR_NOT_FOUND,
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500: ERR_INTERNAL,
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}
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// ============ v2 错误码 → HTTP 状态码映射 ============
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const CODE_TO_HTTP_STATUS = {
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[SUCCESS]: 200,
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[ERR_BAD_REQUEST]: 400,
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[ERR_UNAUTHORIZED]: 401,
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[ERR_FORBIDDEN]: 403,
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[ERR_NOT_FOUND]: 404,
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[ERR_CONFLICT]: 409,
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[ERR_RATE_LIMIT]: 429,
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[ERR_INTERNAL]: 500,
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[ERR_VALIDATION]: 422,
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[ERR_DEPRECATED]: 410,
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}
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// ============ 工具函数 ============
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/**
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* 生成 v2 标准响应
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* @param {number} code - 错误码（0 = 成功）
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* @param {*} data - 响应数据
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* @param {string} [message] - 自定义消息（默认从映射表取）
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* @returns {{ code: number, data: *, message: string }}
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*/
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function respond(code, data, message) {
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return {
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code,
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data: code === SUCCESS ? data : null,
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message: message || ERROR_MESSAGES[code] || '未知错误',
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}
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}
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/**
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* 成功响应快捷方法
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*/
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function success(data, message) {
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return respond(SUCCESS, data, message)
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}
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/**
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* 错误响应快捷方法
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*/
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function error(code, message) {
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return respond(code, null, message)
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}
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/**
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* 将 v1 风格响应转换为 v2 风格
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* v1: { code: 200, data, message }
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* v2: { code: 0, data, message }
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*/
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function fromV1(v1Body) {
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if (!v1Body || typeof v1Body.code !== 'number') return v1Body
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const v2Code = V1_TO_V2_MAP[v1Body.code] ?? v1Body.code
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return {
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code: v2Code,
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data: v2Code === SUCCESS ? v1Body.data : null,
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message: v1Body.message || ERROR_MESSAGES[v2Code] || '',
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}
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}
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/**
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* 获取 v2 错误码对应的 HTTP 状态码
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*/
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function toHttpStatus(code) {
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return CODE_TO_HTTP_STATUS[code] || 400
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}
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module.exports = {
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// 错误码常量
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SUCCESS,
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ERR_BAD_REQUEST, ERR_UNAUTHORIZED, ERR_FORBIDDEN, ERR_NOT_FOUND,
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ERR_CONFLICT, ERR_RATE_LIMIT, ERR_INTERNAL, ERR_VALIDATION, ERR_DEPRECATED,
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ERR_USER_NOT_FOUND, ERR_USER_PASSWORD, ERR_USER_DISABLED, ERR_USER_EXISTS, ERR_USER_PHONE_INVALID,
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ERR_GOODS_NOT_FOUND, ERR_GOODS_OFF_SHELF, ERR_GOODS_STOCK_LOW, ERR_GOODS_NAME_DUPLICATE,
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ERR_ORDER_NOT_FOUND, ERR_ORDER_STATUS, ERR_ORDER_EMPTY, ERR_ORDER_CANNOT_CANCEL,
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ERR_CART_ITEM_NOT_FOUND, ERR_CART_QUANTITY_INVALID, ERR_CART_GOODS_OFF_SHELF,
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ERR_STOCK_NEGATIVE, ERR_STOCK_LOG_NOT_FOUND,
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ERR_REFUND_NOT_FOUND, ERR_REFUND_AMOUNT_INVALID, ERR_REFUND_DUPLICATE, ERR_REFUND_STATUS,
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ERR_POINTS_INSUFFICIENT, ERR_POINTS_GOODS_NOT_FOUND, ERR_POINTS_GOODS_OFF_SHELF,
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ERR_POINTS_GOODS_NO_STOCK, ERR_POINTS_DELTA_EXCEED,
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// 映射表
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ERROR_MESSAGES,
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V1_TO_V2_MAP,
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CODE_TO_HTTP_STATUS,
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// 工具函数
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respond,
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success,
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error,
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fromV1,
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toHttpStatus,
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}
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