| 1 | /** |
| 2 | * server-fetch - 服务端 fetch 封装 |
| 3 | * 用于 Server Component / generateMetadata / sitemap 等 SSR 场景 |
| 4 | * 无客户端依赖（不使用 useUserStore、directTrans） |
| 5 | */ |
| 6 | |
| 7 | interface ServerFetchOptions { |
| 8 | revalidate?: number | false |
| 9 | tags?: string[] |
| 10 | } |
| 11 | |
| 12 | interface ApiResponse<T> { |
| 13 | code: number | string |
| 14 | data: T |
| 15 | message: string |
| 16 | } |
| 17 | |
| 18 | function getBaseUrl() { |
| 19 | // 生产环境 NEXT_PUBLIC_API_URL 是 /api（相对路径），SSR 需要完整 URL |
| 20 | const apiUrl = process.env.NEXT_PUBLIC_API_URL || '/api' |
| 21 | if (apiUrl.startsWith('http')) { |
| 22 | return apiUrl |
| 23 | } |
| 24 | const hostUrl = process.env.NEXT_PUBLIC_HOST_URL || 'https://aitoearn.ai' |
| 25 | return `${hostUrl}${apiUrl}` |
| 26 | } |
| 27 | |
| 28 | /** |
| 29 | * 服务端 GET 请求 |
| 30 | * 利用 Next.js fetch + next.revalidate 实现 ISR 缓存 |
| 31 | */ |
| 32 | export async function serverFetch<T>( |
| 33 | path: string, |
| 34 | params?: Record<string, string | number | boolean | undefined>, |
| 35 | options: ServerFetchOptions = {}, |
| 36 | ): Promise<ApiResponse<T> | null> { |
| 37 | try { |
| 38 | const baseUrl = getBaseUrl() |
| 39 | const url = new URL(`${baseUrl}/${path}`) |
| 40 | |
| 41 | if (params) { |
| 42 | Object.entries(params).forEach(([key, value]) => { |
| 43 | if (value !== undefined) { |
| 44 | url.searchParams.set(key, String(value)) |
| 45 | } |
| 46 | }) |
| 47 | } |
| 48 | |
| 49 | const fetchOptions: RequestInit & { next?: { revalidate?: number | false, tags?: string[] } } = { |
| 50 | method: 'GET', |
| 51 | headers: { |
| 52 | 'Content-Type': 'application/json', |
| 53 | }, |
| 54 | next: {}, |
| 55 | } |
| 56 | |
| 57 | if (options.revalidate !== undefined) { |
| 58 | fetchOptions.next!.revalidate = options.revalidate |
| 59 | } |
| 60 | if (options.tags) { |
| 61 | fetchOptions.next!.tags = options.tags |
| 62 | } |
| 63 | |
| 64 | const res = await fetch(url.toString(), fetchOptions) |
| 65 | if (!res.ok) |
| 66 | return null |
| 67 | |
| 68 | const data: ApiResponse<T> = await res.json() |
| 69 | return data |
| 70 | } |
| 71 | catch { |
| 72 | return null |
| 73 | } |
| 74 | } |
| 75 |