qxzhan revised this gist 2 months ago. Go to revision
1 file changed, 41 insertions
js(file created)
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| 1 | + | // 缓存图片数据，减少重复请求 | |
| 2 | + | let cachedPictures = null; | |
| 3 | + | let cacheTimestamp = 0; | |
| 4 | + | const CACHE_TTL = 43200000; // 缓存12小时（12×60×60×1000毫秒） | |
| 5 | + | ||
| 6 | + | export async function onRequest(context) { | |
| 7 | + | const { request } = context; | |
| 8 | + | ||
| 9 | + | try { | |
| 10 | + | // 使用缓存数据（如果有效） | |
| 11 | + | const now = Date.now(); | |
| 12 | + | if (!cachedPictures || now - cacheTimestamp > CACHE_TTL) { | |
| 13 | + | // 只在缓存过期时才重新请求 | |
| 14 | + | const origin = new URL(request.url).origin; | |
| 15 | + | const response = await fetch(`${origin}/picture/index.json`); | |
| 16 | + | ||
| 17 | + | if (!response.ok) { | |
| 18 | + | return new Response('Index not found', { status: 404 }); | |
| 19 | + | } | |
| 20 | + | ||
| 21 | + | // 直接解析并缓存 | |
| 22 | + | cachedPictures = await response.json(); | |
| 23 | + | cacheTimestamp = now; | |
| 24 | + | } | |
| 25 | + | ||
| 26 | + | // 随机选择一张图片 | |
| 27 | + | const randomIndex = Math.floor(cachedPictures.length * Math.random()); | |
| 28 | + | const path = cachedPictures[randomIndex].path; | |
| 29 | + | ||
| 30 | + | // 返回重定向响应 | |
| 31 | + | return new Response(null, { | |
| 32 | + | status: 302, | |
| 33 | + | headers: { | |
| 34 | + | Location: path, | |
| 35 | + | 'Cache-Control': 'no-store' // 确保每次请求都重新随机 | |
| 36 | + | } | |
| 37 | + | }); | |
| 38 | + | } catch (error) { | |
| 39 | + | return new Response('Error', { status: 500 }); | |
| 40 | + | } | |
| 41 | + | } | |
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