Wake-on-LAN (WOL)

[radbobdad]

A common use case for OBS-web will be people on a local network who want to connect to OBS Studio, which is running on a computer that is currently in sleep mode.
Although there exist standalone WOL utilities, it's common for remote clients to offer this capability natively during connection. It would be nice to build that into this client as an option during Connect. Sending the WOL "magic packet" needn't be an explicit UI feature, since it's harmless to send it to a machine which isn't asleep, so we could send it all the time, just in case. The "magic packet" is simply a carefully-constructed broadcast packet.
A variety of alternatives for obtaining the MAC address, from brute-force to magically-delicious, could be:

1. Have the user enter the MAC address of the computer to wake the first time, and hold that in a cookie for future
2. After a connection, do a lookup from the ARP cache to retrieve the MAC address and cache it in a cookie for future (this would pair well with alternative 1 from this idea
3. Leverage alternative 2 from that idea to advertise the MAC address as well as the IP, and cache it in a cookie. This of course would only work if the OBS Studio host was running the first time, in order for OBS to send the advertisement.

[Niek]

I appreciate the idea, but I'm afraid this is not technically feasible. WOL uses a specially crafted UDP message, which is something that browsers do not support (at least currently). OBS uses a TCP websocket connection, which is very different.
Your best bet is a separate WOL tool (e.g. https://wolow.site/) or browser extension (e.g. https://chromewebstore.google.com/detail/wake-on-lan-wol/apfabhfippohjkndobkbeoiplilgojei) - both untested by me though.