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fix(remux): preserve encrypted HLS and test protocol restrictions

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Allow nested crypto for encrypted HTTP HLS while rejecting top-level protocol wrappers and local-file access. Replace the HLS-only http_persistent option with HTTP multiple_requests across probe/remux/transcode paths, fixing the raw HTTP regression introduced by #124. Add real FFmpeg regression tests and PR CI.
This commit is contained in:
Technomancer702
2026-10-12 15:41:13 -07:00
parent 138efd6007
commit 9fff0474e1
7 changed files with 227 additions and 11 deletions
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2
server/routes/probe.js
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@ -33,7 +33,7 @@ function probeStream(url, ffprobePath, userAgent = null, timeout = 15000) {
const args = [
'-v', 'error',
'-user_agent', userAgent || 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36',
'-http_persistent', '0',
'-multiple_requests', '0',
'-reconnect', '1',
'-reconnect_streamed', '1',
'-reconnect_on_http_error', '4xx,5xx',

13
server/routes/remux.js
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@ -9,9 +9,8 @@ const db = require('../db');
* FFmpeg accepts a wide variety of protocol handlers (file://, concat:,
* subfile:, data:, pipe:, crypto:, async:, cache:, ...). Several of them
* read from the local filesystem or compose existing protocols, so they
* must NOT be reachable from a request parameter — otherwise an attacker
* who can call /api/remux can read arbitrary local files via the streamed
* response.
* must not be reachable from a request parameter. Remux inputs should only
* reference network streams, never local files or protocol wrappers.
*
* Only plain http/https stream URLs are valid inputs here.
*/
@ -23,11 +22,13 @@ const ALLOWED_URL_SCHEMES = new Set(['http:', 'https:']);
* if a future code path forwarded a different URL, ffmpeg itself would
* refuse to touch local files / arbitrary demuxer-level protocols.
*
* - file/concat/subfile/pipe/data/crypto/async/cache are intentionally absent.
* - file/concat/subfile/pipe/data/async/cache are intentionally absent.
* - tls/tcp are needed for https; https/http are obvious.
* - hls is needed so the demuxer can follow HLS playlists.
* - crypto is needed for AES-encrypted HLS segments. Nested file access
* remains blocked, and top-level crypto URLs are rejected by the validator.
*/
const FFMPEG_PROTOCOL_WHITELIST = 'http,https,tls,tcp,hls';
const FFMPEG_PROTOCOL_WHITELIST = 'http,https,tls,tcp,hls,crypto';
/**
* Validate a user-supplied stream URL.
@ -98,7 +99,7 @@ router.get('/', async (req, res) => {
'-err_detect', 'ignore_err',
// Limit max demux delay to prevent buffering issues with bad timestamps
'-max_delay', '5000000',
'-http_persistent', '0',
'-multiple_requests', '0',
// Reconnect settings for network drops
'-reconnect', '1',
'-reconnect_streamed', '1',

2
server/routes/transcode.js
View File

@ -192,7 +192,7 @@ router.get('/', async (req, res) => {
'-err_detect', 'ignore_err',
// Limit max demux delay to prevent buffering issues
'-max_delay', '2000000',
'-http_persistent', '0',
'-multiple_requests', '0',
// Reconnect settings for network drops (useful for live streams)
'-reconnect', '1',
'-reconnect_streamed', '1',