Custom URL scheme for macOS

[RebeccaMahany]

Questions for code review:

• Do you like ~kolideagent~ kolide as the protocol name? Do you have another idea?

Notes:

• This does not work if the actor runs in launcher root instead of launcher desktop.
• This required /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -kill -seed to force macOS to recognizing the custom binding. I think this was something weird with my test setup -- when others tested, they didn't need this command for the scheme to work. But it's possible that this is something we'll need to account for during launcher startup.

Excerpt from example log:

\"msg\":\"received custom protocol request\"
\"request_url\":\"kolide://wow\"

Screenshot of permission popup

Useful links

* https://developer.apple.com/documentation/xcode/defining-a-custom-url-scheme-for-your-app * https://stackoverflow.com/questions/77443348/javascript-invoke-custom-protocol

[directionless]

I think we're closing this in favor of Universal Links? Feel free to reopen if I'm wrong