Spaces:
Paused
Paused
File size: 4,031 Bytes
b665708 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 |
import { request } from "undici";
import { Readable } from "node:stream";
import { closeRequest, getHeaders, pipe } from "./shared.js";
import { handleHlsPlaylist, isHlsResponse } from "./internal-hls.js";
const CHUNK_SIZE = BigInt(8e6); // 8 MB
const min = (a, b) => a < b ? a : b;
async function* readChunks(streamInfo, size) {
let read = 0n;
while (read < size) {
if (streamInfo.controller.signal.aborted) {
throw new Error("controller aborted");
}
const chunk = await request(streamInfo.url, {
headers: {
...getHeaders('youtube'),
Range: `bytes=${read}-${read + CHUNK_SIZE}`
},
dispatcher: streamInfo.dispatcher,
signal: streamInfo.controller.signal
});
const expected = min(CHUNK_SIZE, size - read);
const received = BigInt(chunk.headers['content-length']);
if (received < expected / 2n) {
closeRequest(streamInfo.controller);
}
for await (const data of chunk.body) {
yield data;
}
read += received;
}
}
async function handleYoutubeStream(streamInfo, res) {
const { signal } = streamInfo.controller;
const cleanup = () => (res.end(), closeRequest(streamInfo.controller));
try {
const req = await fetch(streamInfo.url, {
headers: getHeaders('youtube'),
method: 'HEAD',
dispatcher: streamInfo.dispatcher,
signal
});
streamInfo.url = req.url;
const size = BigInt(req.headers.get('content-length'));
if (req.status !== 200 || !size) {
return cleanup();
}
const generator = readChunks(streamInfo, size);
const abortGenerator = () => {
generator.return();
signal.removeEventListener('abort', abortGenerator);
}
signal.addEventListener('abort', abortGenerator);
const stream = Readable.from(generator);
for (const headerName of ['content-type', 'content-length']) {
const headerValue = req.headers.get(headerName);
if (headerValue) res.setHeader(headerName, headerValue);
}
pipe(stream, res, cleanup);
} catch {
cleanup();
}
}
async function handleGenericStream(streamInfo, res) {
const { signal } = streamInfo.controller;
const cleanup = () => res.end();
try {
const fileResponse = await request(streamInfo.url, {
headers: {
...Object.fromEntries(streamInfo.headers),
host: undefined
},
dispatcher: streamInfo.dispatcher,
signal,
maxRedirections: 16
});
res.status(fileResponse.statusCode);
fileResponse.body.on('error', () => {});
// bluesky's cdn responds with wrong content-type for the hls playlist,
// so we enforce it here until they fix it
const isHls = isHlsResponse(fileResponse)
|| (streamInfo.service === "bsky" && streamInfo.url.endsWith('.m3u8'));
for (const [ name, value ] of Object.entries(fileResponse.headers)) {
if (!isHls || name.toLowerCase() !== 'content-length') {
res.setHeader(name, value);
}
}
if (fileResponse.statusCode < 200 || fileResponse.statusCode > 299) {
return cleanup();
}
if (isHls) {
await handleHlsPlaylist(streamInfo, fileResponse, res);
} else {
pipe(fileResponse.body, res, cleanup);
}
} catch {
closeRequest(streamInfo.controller);
cleanup();
}
}
export function internalStream(streamInfo, res) {
if (streamInfo.headers) {
streamInfo.headers.delete('icy-metadata');
}
if (streamInfo.service === 'youtube' && !streamInfo.isHLS) {
return handleYoutubeStream(streamInfo, res);
}
return handleGenericStream(streamInfo, res);
}
|