api: flatten code directories, better filenames, remove old files

api/src/stream/internal-hls.js

@@ -0,0 +1,71 @@
+import { createInternalStream } from './manage.js';
+import HLS from 'hls-parser';
+
+function getURL(url) {
+    try {
+        return new URL(url);
+    } catch {
+        return null;
+    }
+}
+
+function transformObject(streamInfo, hlsObject) {
+    if (hlsObject === undefined) {
+        return (object) => transformObject(streamInfo, object);
+    }
+
+    let fullUrl;
+    if (getURL(hlsObject.uri)) {
+        fullUrl = hlsObject.uri;
+    } else {
+        fullUrl = new URL(hlsObject.uri, streamInfo.url);
+    }
+
+    hlsObject.uri = createInternalStream(fullUrl.toString(), streamInfo);
+
+    if (hlsObject.map) {
+        hlsObject.map = transformObject(streamInfo, hlsObject.map);
+    }
+
+    return hlsObject;
+}
+
+function transformMasterPlaylist(streamInfo, hlsPlaylist) {
+    const makeInternalStream = transformObject(streamInfo);
+
+    const makeInternalVariants = (variant) => {
+        variant = transformObject(streamInfo, variant);
+        variant.video = variant.video.map(makeInternalStream);
+        variant.audio = variant.audio.map(makeInternalStream);
+        return variant;
+    };
+    hlsPlaylist.variants = hlsPlaylist.variants.map(makeInternalVariants);
+
+    return hlsPlaylist;
+}
+
+function transformMediaPlaylist(streamInfo, hlsPlaylist) {
+    const makeInternalSegments = transformObject(streamInfo);
+    hlsPlaylist.segments = hlsPlaylist.segments.map(makeInternalSegments);
+    hlsPlaylist.prefetchSegments = hlsPlaylist.prefetchSegments.map(makeInternalSegments);
+    return hlsPlaylist;
+}
+
+const HLS_MIME_TYPES = ["application/vnd.apple.mpegurl", "audio/mpegurl", "application/x-mpegURL"];
+
+export function isHlsRequest (req) {
+    return HLS_MIME_TYPES.includes(req.headers['content-type']);
+}
+
+export async function handleHlsPlaylist(streamInfo, req, res) {
+    let hlsPlaylist = await req.body.text();
+    hlsPlaylist = HLS.parse(hlsPlaylist);
+
+    hlsPlaylist = hlsPlaylist.isMasterPlaylist
+        ? transformMasterPlaylist(streamInfo, hlsPlaylist)
+        : transformMediaPlaylist(streamInfo, hlsPlaylist);
+
+    hlsPlaylist = HLS.stringify(hlsPlaylist);
+
+    res.send(hlsPlaylist);
+}