chizw/腾讯EO Pages随机图API

js · 1.2 KiB · JavaScript Raw

// 缓存图片数据，减少重复请求
let cachedPictures = null;
let cacheTimestamp = 0;
const CACHE_TTL = 43200000; // 缓存12小时（12×60×60×1000毫秒）

export async function onRequest(context) {
  const { request } = context;
  
  try {
    // 使用缓存数据（如果有效）
    const now = Date.now();
    if (!cachedPictures || now - cacheTimestamp > CACHE_TTL) {
      // 只在缓存过期时才重新请求
      const origin = new URL(request.url).origin;
      const response = await fetch(`${origin}/picture/index.json`);
      
      if (!response.ok) {
        return new Response('Index not found', { status: 404 });
      }
      
      // 直接解析并缓存
      cachedPictures = await response.json();
      cacheTimestamp = now;
    }
    
    // 随机选择一张图片
    const randomIndex = Math.floor(cachedPictures.length * Math.random());
    const path = cachedPictures[randomIndex].path;
    
    // 返回重定向响应
    return new Response(null, {
      status: 302,
      headers: {
        Location: path,
        'Cache-Control': 'no-store' // 确保每次请求都重新随机
      }
    });
  } catch (error) {
    return new Response('Error', { status: 500 });
  }
}

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	}