Accessing non https URLs via Workshop

[bala]

We’re trying to launch a desktop application from a Workshop button using a custom protocol (e.g. lviewer://).

Observations in our FDP environment:

• Typing lviewer:// (or music://) directly into Chrome works as expected.

• Triggering the same protocol from:

  • Workshop “Open URL” event

  • Slate (Code Sandbox) via window.open()

  • Slate <a href="lviewer://"> link
    results in nothing happening (no new tab, no prompt).

• Even window.open("https://www.google.com") from Slate does not open a new tab, suggesting navigation is sandboxed.

Is access to non-HTTPS schemes (custom protocol handlers) intentionally blocked from Workshop/Slate surfaces?
If so, is there any supported way to launch a desktop app via deep link from Foundry (e.g., via a permitted navigation mechanism)?

Thanks in advance.

[drusak]

Hello, chiming in from Slate side

It is indeed the case that in Slate functions’ code is sandboxed and one cannot use window.open() for redirection, but we have a special Action for doing just that - https://www.palantir.com/docs/foundry/slate/concepts-events-and-actions-index/#slateredirecttourl

You can trigger this Action in response to any Slate Event (see https://www.palantir.com/docs/foundry/slate/concepts-events/ for some intro into Events & Actions) - in the screenshots below I set up a button click Event to redirect me to lviewer:// - the browser understands that (although in my case a blank page opens, since I do not have support for this protocol)

Hope that helps!
Damian

[bala]

Damian, this is very helpful - thank you! Solved.