Support for custom protocols besides http and https

[Andrej730]

I've found that custom protocols are not supported in discord urls. On the attached image you can see that discord doesn't recognize custom protocols (besides http really) such as steam://, tg:// (for telegram), ftp:// (FTP is missing, really??) in usual messages.
And discord also ignores them in embeds description where markdown seems to be supported.

Could be related to #4509

[advaith1]

fwiw support for protocol links was just removed a few weeks ago

[Andrej730]

why?

[murpii]

They even removed the steam browser protocol support now as well... with no explanation to why.

[Cynosphere]

They even removed the steam browser protocol support now as well... with no explanation to why.

This might be an oversight that they might not currently recognize. Only "http:", "https:" and "discord:" are whitelisted at the current moment as of Canary 198855

[mr-tech]

why?

The tl;dr is security patches because now users can use masked links. Though I think it's more a matter of whitelisting as opposed to blacklisting, so steam:// may be something Discord is willing to allow.

Discord's probably not going to share any deets at all about what their validation is, particularly since it's been in flux since the change first occurred. There was an issue about it here: #6088 with some back-and-forth, but since it's closed it probably won't get anymore eyeballs so YMMV posting in it.