bilibili: add support for bilibili.tv links

closes #319

src/modules/processing/services/bilibili.js

@@ -1,42 +1,105 @@
 import { genericUserAgent, maxVideoDuration } from "../../config.js";
 
-// TO-DO: quality picking, bilibili.tv support, and higher quality downloads (currently requires an account)
-export default async function({ id, shortLink }) {
-    if (shortLink) {
-        id = await fetch(`https://b23.tv/${shortLink}`, { redirect: 'manual' })
+// TO-DO: higher quality downloads (currently requires an account)
+
+function com_resolveShortlink(shortId) {
+    return fetch(`https://b23.tv/${shortId}`, { redirect: 'manual' })
             .then(r => r.status > 300 && r.status < 400 && r.headers.get('location'))
             .then(url => {
+                if (!url) return;
                 const path = new URL(url).pathname;
                 if (path.startsWith('/video/'))
                     return path.split('/')[2];
             })
             .catch(() => {})
-    }
+}
 
-    if (!id) {
-        return { error: 'ErrorCouldntFetch' };
-    }
+function getBest(content) {
+    return content?.filter(v => v.baseUrl || v.url)
+                .map(v => (v.baseUrl = v.baseUrl || v.url, v))
+                .reduce((a, b) => a?.bandwidth > b?.bandwidth ? a : b);
+}
 
+function extractBestQuality(dashData) {
+    const bestVideo = getBest(dashData.video),
+          bestAudio = getBest(dashData.audio);
+
+    if (!bestVideo || !bestAudio) return [];
+    return [ bestVideo, bestAudio ];
+}
+
+async function com_download(id) {
     let html = await fetch(`https://bilibili.com/video/${id}`, {
         headers: { "user-agent": genericUserAgent }
     }).then((r) => { return r.text() }).catch(() => { return false });
     if (!html) return { error: 'ErrorCouldntFetch' };
-    if (!(html.includes('<script>window.__playinfo__=') && html.includes('"video_codecid"'))) return { error: 'ErrorEmptyDownload' };
+
+    if (!(html.includes('<script>window.__playinfo__=') && html.includes('"video_codecid"'))) {
+        return { error: 'ErrorEmptyDownload' };
+    }
 
     let streamData = JSON.parse(html.split('<script>window.__playinfo__=')[1].split('</script>')[0]);
-    if (streamData.data.timelength > maxVideoDuration) return { error: ['ErrorLengthLimit', maxVideoDuration / 60000] };
+    if (streamData.data.timelength > maxVideoDuration) {
+        return { error: ['ErrorLengthLimit', maxVideoDuration / 60000] };
+    }
 
-    let video = streamData["data"]["dash"]["video"].filter(v => 
-        !v["baseUrl"].includes("https://upos-sz-mirrorcosov.bilivideo.com/")
-    ).sort((a, b) => Number(b.bandwidth) - Number(a.bandwidth));
-
-    let audio = streamData["data"]["dash"]["audio"].filter(a => 
-        !a["baseUrl"].includes("https://upos-sz-mirrorcosov.bilivideo.com/")
-    ).sort((a, b) => Number(b.bandwidth) - Number(a.bandwidth));
+    const [ video, audio ] = extractBestQuality(streamData.data.dash);
+    if (!video || !audio) {
+        return { error: 'ErrorEmptyDownload' };
+    }
 
     return {
-        urls: [video[0]["baseUrl"], audio[0]["baseUrl"]],
+        urls: [video.baseUrl, audio.baseUrl],
         audioFilename: `bilibili_${id}_audio`,
-        filename: `bilibili_${id}_${video[0]["width"]}x${video[0]["height"]}.mp4`
+        filename: `bilibili_${id}_${video.width}x${video.height}.mp4`
     };
 }
+
+async function tv_download(id) {
+    const url = new URL(
+        'https://api.bilibili.tv/intl/gateway/web/playurl'
+        + '?s_locale=en_US&platform=web&qn=64&type=0&device=wap'
+        + '&tf=0&spm_id=bstar-web.ugc-video-detail.0.0&from_spm_id='
+    );
+
+    url.searchParams.set('aid', id);
+
+    const { data } = await fetch(url).then(a => a.json());
+    if (!data?.playurl?.video) {
+        return { error: 'ErrorEmptyDownload' };
+    }
+
+    const [ video, audio ] = extractBestQuality({
+        video: data.playurl.video.map(s => s.video_resource)
+                                 .filter(s => s.codecs.includes('avc1')),
+        audio: data.playurl.audio_resource
+    });
+
+    if (!video || !audio) {
+        return { error: 'ErrorEmptyDownload' };
+    }
+
+    if (video.duration > maxVideoDuration) {
+        return { error: ['ErrorLengthLimit', maxVideoDuration / 60000] };
+    }
+
+    return {
+        urls: [video.url, audio.url],
+        audioFilename: `bilibili_tv_${id}_audio`,
+        filename: `bilibili_tv_${id}.mp4`
+    };
+}
+
+export default async function({ comId, tvId, comShortLink }) {
+    if (comShortLink) {
+        comId = await com_resolveShortlink(comShortLink);
+    }
+
+    if (comId) {
+        return com_download(comId);
+    } else if (tvId) {
+        return tv_download(tvId);
+    }
+
+    return { error: 'ErrorCouldntFetch' };
+}

src/modules/processing/servicesConfig.json

@@ -2,8 +2,11 @@
     "audioIgnore": ["vk", "ok"],
     "config": {
         "bilibili": {
-            "alias": "bilibili.com videos",
-            "patterns": ["video/:id", "_shortLink/:shortLink"],
+            "alias": "bilibili.com and bilibili.tv videos",
+            "patterns": [
+                "video/:comId", "_shortLink/:comShortLink",
+                "_tv/:lang/video/:tvId", "_tv/video/:tvId"
+            ],
             "enabled": true
         },
         "reddit": {

src/modules/processing/servicesPatternTesters.js

@@ -1,6 +1,7 @@
 export const testers = {
     "bilibili": (patternMatch) => 
-        patternMatch.id?.length <= 12 || patternMatch.shortLink?.length <= 16,
+        patternMatch.comId?.length <= 12 || patternMatch.comShortLink?.length <= 16
+        || patternMatch.tvId?.length <= 24,
 
     "instagram": (patternMatch) =>
         patternMatch.postId?.length <= 12

src/modules/processing/url.js

@@ -49,6 +49,11 @@ export function aliasURL(url) {
             }
             break;
 
+        case "bilibili":
+            if (host.tld === 'tv') {
+                url = new URL(`https://bilibili.com/_tv${url.pathname}`);
+            }
+            break;
         case "b23":
             if (url.hostname === 'b23.tv' && parts.length === 2) {
                 url = new URL(`https://bilibili.com/_shortLink/${parts[1]}`)

src/test/tests.json

@@ -754,6 +754,15 @@
             "code": 200,
             "status": "stream"
         }
+    },
+    {
+        "name": "bilibili.tv link",
+        "url": "https://www.bilibili.tv/en/video/4789599404426256",
+        "params": {},
+        "expected": {
+            "code": 200,
+            "status": "stream"
+        }
     }],
     "tumblr": [{
         "name": "at.tumblr link",