Fails to find nsig function

[fpletz]

Bug fixed upstream. Update your containers.

---

Tried with different source IPs (residential, data center, VPN) and environments (NixOS, official Docker image).

Log:

[2024-12-09T18:16:24Z INFO  inv_sig_helper_rust] Fetching player
[2024-12-09T18:16:25Z INFO  inv_sig_helper_rust::player] Fetching player JS URL: https://www.youtube.com/s/player/3bb1f723/player_ias.vflset/en_US/base.js
[2024-12-09T18:16:25Z WARN  inv_sig_helper_rust::player] nsig function ending did not work: =\s*function(\([\w]+\)\{\s*var\s+[\w\s]+=[\w\.\s]+?\.call\s*\([\w\s$]+?,[\(\)\",\s]+\)[\S\s]*?\}\s*return [\w\.\s$]+?\.call\s*\([\w\s$]+?\s*,[\(\)\",\s]+\)\s*\}\s*;)
thread 'main' panicked at src/player.rs:150:10:
called `Option::unwrap()` on a `None` value
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[MrLego8-9]

Complete trace

inv_sig_helper-1  | [2024-12-09T18:15:58Z INFO  inv_sig_helper_rust] Fetching player
inv_sig_helper-1  | [2024-12-09T18:15:59Z INFO  inv_sig_helper_rust::player] Fetching player JS URL: https://www.youtube.com/s/player/3bb1f723/player_ias.vflset/en_US/base.js
inv_sig_helper-1  | [2024-12-09T18:15:59Z WARN  inv_sig_helper_rust::player] nsig function ending did not work: =\s*function(\([\w]+\)\{\s*var\s+[\w\s]+=[\w\.\s]+?\.call\s*\([\w\s$]+?,[\(\)\",\s]+\)[\S\s]*?\}\s*return [\w\.\s$]+?\.call\s*\([\w\s$]+?\s*,[\(\)\",\s]+\)\s*\}\s*;)
inv_sig_helper-1  | thread 'main' panicked at src/player.rs:150:10:
inv_sig_helper-1  | called `Option::unwrap()` on a `None` value
inv_sig_helper-1  | stack backtrace:
inv_sig_helper-1  |    0:     0x768bf86ea0f1 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h706c9783aace6373
inv_sig_helper-1  |    1:     0x768bf85467fb - core::fmt::write::h7221bf2763310748
inv_sig_helper-1  |    2:     0x768bf86c3ce2 - std::io::Write::write_fmt::h5f543a3ea7d45c3d
inv_sig_helper-1  |    3:     0x768bf86ef269 - std::sys_common::backtrace::print::hf2079bcf21b5d607
inv_sig_helper-1  |    4:     0x768bf86eea56 - std::panicking::default_hook::{{closure}}::hd6a41ed4ba4d9cdd
inv_sig_helper-1  |    5:     0x768bf86efe61 - std::panicking::rust_panic_with_hook::he62aa99a29ab1fe6
inv_sig_helper-1  |    6:     0x768bf86ef59a - std::panicking::begin_panic_handler::{{closure}}::h4295830cbed5c147
inv_sig_helper-1  |    7:     0x768bf86ef529 - std::sys_common::backtrace::__rust_end_short_backtrace::h29724adceafc0e2c
inv_sig_helper-1  |    8:     0x768bf86ef516 - rust_begin_unwind
inv_sig_helper-1  |    9:     0x768bf84c0192 - core::panicking::panic_fmt::h5822797b7c57c9a6
inv_sig_helper-1  |   10:     0x768bf84c032b - core::panicking::panic::h576d2b304e82d017
inv_sig_helper-1  |   11:     0x768bf84c06e8 - core::option::unwrap_failed::hf12f69fdafb5c188
inv_sig_helper-1  |   12:     0x768bf84fdc7e - inv_sig_helper_rust::player::fetch_update::{{closure}}::h61359dd4904a6910
inv_sig_helper-1  |   13:     0x768bf8516c18 - inv_sig_helper_rust::main::{{closure}}::h92460df08abff2f1
inv_sig_helper-1  |   14:     0x768bf850ddca - inv_sig_helper_rust::main::h4c6ed7911b8effb7
inv_sig_helper-1  |   15:     0x768bf84d58c3 - std::sys_common::backtrace::__rust_begin_short_backtrace::h65fca62ed9181c86
inv_sig_helper-1  |   16:     0x768bf851a154 - main

[rudism]

Looks like YT changed something that breaks the regex that extracts the nsig function. youtube-dl and yt-dlp facing/faced similar issues in the past few days:

• [YOUTUBE] ERROR: Unable to extract nsig function code (caused by RegexNotFoundError('Unable to extract Initial JS player n function name...  ytdl-org/youtube-dl#32986
• [YouTube] player 3bb1f723: nsig extraction failed: Some formats may be missing yt-dlp/yt-dlp#11744

[unixfox]

YouTube.js seems affected too: LuanRT/YouTube.js#831

[unixfox]

Like with every bug report. Please comment only if you have new things to bring on. Thank you.

[lifo9]

I've tried to create a patch using yt-dlp fixes(1, 2).
It seems that signature helper is now working:

...
[2024-12-09T23:43:20Z DEBUG inv_sig_helper_rust::player] got nsig fn code: function decrypt_nsig(J){var R=J.split(J.slice(0,0)),...
[2024-12-09T23:43:20Z INFO  inv_sig_helper_rust::player] sig code: var pen;var Gw={s9:function(J,R){J.splice(0,R)},Az:function(J,R){var N=J[0];J[0]=J[R%J.length];J[R%J.length]=N},hp:function(J){J.reverse()}};pen=function(J){J=J.split("");Gw.Az(J,29);Gw.s9(J,3);Gw.Az(J,43);Gw.Az(J,11);Gw.s9(J,3);Gw.Az(J,3);Gw.Az(J,34);return J.join("")}
[2024-12-09T23:43:20Z INFO  inv_sig_helper_rust] Successfully fetched player
...

But on the video page I get the following error:

The media could not be loaded, either because the server or network failed or because the format is not supported.

and the request to /videoplayback fails with 403 error...

[lifo9]

I think I've got a fix 🎉
Disclaimer: I don't know Rust, it was hacked together with a help from LLMs.

https://0x0.st/XhpM.patch

[ggtylerr]

Confirmed working - Have it on both of my servers, CAL-1 and POL-1, and videos seem to work fine. Thank you @lifo9 and @rockerBOO !

[unixfox]

@lifo9 feel free to send a PR even if it's not that clean.

[unixfox]

Fixed in ac0269f. Docker image of inv_sig_helper has been rebuilt.

[Wyrrrd]

Being on latest, it worked for last week, but the bug (or a similar one) returned around 5min ago...

[2024-12-16T17:37:55Z INFO  inv_sig_helper_rust] Fetching player
[2024-12-16T17:37:56Z INFO  inv_sig_helper_rust::player] Fetching player JS URL: https://www.youtube.com/s/player/2f1832d2/player_ias.vflset/en_US/base.js
[2024-12-16T17:37:56Z WARN  inv_sig_helper_rust::player] nsig function ending did not work: =\s*function(\([\w]+\)\{\s*var\s+[\w\s]+=[\w\.\s]+?\.call\s*\([\w\s$]+?,[\(\)\",\s]+\)[\S\s]*?\}\s*return [\w\.\s$]+?\.call\s*\([\w\s$]+?\s*,[\(\)\",\s]+\)\s*\}\s*;)
thread 'main' panicked at src/player.rs:185:10:
called `Option::unwrap()` on a `None` value
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

[predecker]

same here.

[RobinBoers]

Same issue here, also on latest

[uncaney]

same