92 lines
2.3 KiB
JavaScript
92 lines
2.3 KiB
JavaScript
// 为Miawa下载源获取直链
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// 成功时 302 到直链，失败时降级到无token页面
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const MIAWA_API = 'https://miawa.cn/api/v2/downloads/prepare'
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const MIAWA_DOWNLOAD_BASE = 'https://miawa.cn/download'
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function encodeFilePath(filePath) {
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return filePath
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.split('/')
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.map((segment) => encodeURIComponent(segment))
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.join('/')
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}
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function redirect(location) {
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return new Response(null, {
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status: 302,
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headers: {
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Location: location,
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'Cache-Control': 'no-store',
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},
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})
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}
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function isMiawaUrl(value) {
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try {
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const url = new URL(value, 'https://miawa.cn')
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return url.hostname === 'miawa.cn' || url.hostname.endsWith('.miawa.cn')
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} catch {
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return false
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}
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}
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function toAbsoluteMiawaUrl(downloadPath) {
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if (/^https?:\/\//i.test(downloadPath)) {
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return new URL(downloadPath).toString()
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}
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if (downloadPath.startsWith('//')) {
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return new URL(`https:${downloadPath}`).toString()
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}
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return new URL(downloadPath, 'https://miawa.cn').toString()
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}
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function getFilePath(request) {
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try {
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if (request.url) {
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const filePath = new URL(request.url).searchParams.get('file_path')
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if (filePath) return filePath
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}
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} catch {}
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return request.queryStringParameters?.file_path ?? null
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}
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export default async (request) => {
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try {
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const filePath = getFilePath(request)
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if (!filePath) {
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return new Response('Missing file_path', { status: 400 })
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}
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const response = await fetch(MIAWA_API, {
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method: 'POST',
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headers: {
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Accept: 'application/json',
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'Content-Type': 'application/json',
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'User-Agent': 'Axolotl-Website',
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},
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body: JSON.stringify({ file_path: filePath }),
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signal: AbortSignal.timeout(8000),
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})
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if (!response.ok) {
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return redirect(`${MIAWA_DOWNLOAD_BASE}/${encodeFilePath(filePath)}`)
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}
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const payload = await response.json()
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const downloadPath = payload?.data?.download_url
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if (typeof downloadPath !== 'string' || !downloadPath) {
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return redirect(`${MIAWA_DOWNLOAD_BASE}/${encodeFilePath(filePath)}`)
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}
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const location = isMiawaUrl(downloadPath)
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? toAbsoluteMiawaUrl(downloadPath)
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: `${MIAWA_DOWNLOAD_BASE}/${encodeFilePath(filePath)}`
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return redirect(location)
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} catch {
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const filePath = getFilePath(request)
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if (!filePath) {
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return new Response('Missing file_path', { status: 400 })
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}
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return redirect(`${MIAWA_DOWNLOAD_BASE}/${encodeFilePath(filePath)}`)
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}
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}
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