nuxt4-demo/app/utils/http/error-message.ts

export function getApiErrorMessage(error: unknown): string {
  if (error && typeof error === 'object') {
    const e = error as Record<string, unknown>
    const data = e.data
    if (data && typeof data === 'object' && data !== null) {
      const m = (data as Record<string, unknown>).message
      if (typeof m === 'string' && m.trim().length > 0) {
        return m
      }
    }
    const sm = e.statusMessage
    if (typeof sm === 'string' && sm.trim().length > 0) {
      return sm
    }
  }

  if (error instanceof Error && error.message.trim().length > 0) {
    return error.message
  }

  if (error && typeof error === 'object' && 'statusCode' in error) {
    const code = (error as { statusCode?: number }).statusCode
    if (code === 401) {
      return '登录已失效，请重新登录'
    }
    if (code === 403) {
      return '没有权限执行此操作'
    }
    if (code === 404) {
      return '请求的资源不存在'
    }
    if (typeof code === 'number' && code >= 500) {
      return '服务暂时不可用，请稍后重试'
    }
  }

  if (error instanceof TypeError) {
    return '网络异常，请检查连接后重试'
  }

  return '请求失败，请稍后重试'
}