playurl 的 baseUrl 大概率落在 PCDN(京东云无线宝 mcdn.bilivideo.cn、迅雷 mountaintoys 等),旧代码只取 baseUrl(backupUrl 0 处使用)且探测失败仍 原样返回坏地址,点歌端连 PCDN 挂死。现候选 = baseUrl+backupUrl 按 host 分级(upos/Akamai 正规 CDN > cn-* 等 bilivideo.com 系 > PCDN),探测改为 fetch 只读响应头即断开(不等 body,CDN 忽略 Range 回 200 全量时不再整文件 缓冲),单跳 8s / 总预算 20s / 至多 3 候选,全败回退最优候选(fail-soft); CDN 探测不再携带 Cookie(直链自带签名,避免登录态泄给第三方 PCDN 域名)。 getAudioUrl 返回 urls[],parse 改取 urls[0]。 新增 test/bili-cdn-test.ts(SDK 层 PCDN 硬断言,并入 pnpm test)与 smoke 「URL bili(CDN 分级选址)」软断言项。
73 lines
2.8 KiB
TypeScript
73 lines
2.8 KiB
TypeScript
// Bilibili 链接解析(上游 bilibili/song.go 的 `Parse`)
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// 支持 https://www.bilibili.com/video/BVxxx?p=2 与 av 号(上游只认 BV,任务要求兼容 av);
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// 与上游一致:合集(ugc_season)或多分P链接会被判定为歌单并抛错,请改用 playlist.parsePlaylistLink。
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// 上游 Parse 会顺带填入下载地址,这里同样 best-effort 填充 url(失败不影响元数据返回)。
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import { extractAid, extractBvid, extractPage, fetchPageList, fetchView, makeSong, normalizeCover } from './util.ts'
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import { getAudioUrl } from '../apis/bili.ts'
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import { parsePlaylistLink } from './playlist.ts'
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export const parseSong = async(link: string) => {
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const raw = String(link || '').trim()
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const bvid = extractBvid(raw)
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const aid = extractAid(raw)
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if (!bvid && !aid) throw new Error('无效的B站链接:未找到 BV/av 号')
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const view = await fetchView(bvid || aid)
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const pages: any[] = view?.pages ?? []
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// 上游:合集或多分P视为歌单链接(Parse 只处理单P)
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if (view?.ugc_season || pages.length > 1) {
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throw new Error('该链接是合集/多分P视频,请使用歌单解析(parsePlaylistLink)')
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}
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if (pages.length <= 1) {
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try {
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const pageList = await fetchPageList(view.bvid || bvid)
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if (pageList.length > 1) throw new Error('该链接是合集/多分P视频,请使用歌单解析(parsePlaylistLink)')
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} catch (err: any) {
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if (String(err?.message || '').includes('歌单解析')) throw err
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// 分P列表接口失败时按上游语义忽略
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}
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}
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if (!pages.length) throw new Error('未找到视频分P')
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let page = extractPage(raw)
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if (page > pages.length) page = 1
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const target = pages[page - 1]
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const rootTitle = view.title || ''
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let displayTitle = target?.part || ''
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if (pages.length === 1 && !displayTitle) displayTitle = rootTitle
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else if (displayTitle !== rootTitle) displayTitle = `${rootTitle} - ${displayTitle}`
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const cid = String(target?.cid ?? '')
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const song: any = makeSong({
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bvid: view.bvid || bvid,
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cid,
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name: displayTitle,
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artist: view?.owner?.name || '',
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album: view.bvid || bvid,
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duration: target?.duration,
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cover: normalizeCover(view?.pic || ''),
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page,
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})
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// 上游 Parse 会立即填充音频地址(失败忽略);urls 已按 CDN 分级排序,取最优候选
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if (cid) {
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try {
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const audio = await getAudioUrl(song.bvid, cid)
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if (audio?.urls?.[0]) {
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song.url = audio.urls[0]
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song.type = audio.type
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}
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} catch {
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// 忽略:元数据仍可返回
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}
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}
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return song
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}
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/** 歌单/合集链接解析(上游 bilibili/playlist.go 的 `ParsePlaylist`) */
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export const parsePlaylist = async(link: string) => parsePlaylistLink(link)
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export default { parseSong, parsePlaylist }
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