While creating the authentication provider, I discovered a helpful handler in the Visual Studio Code API, which allows you to handle system-wide URIs and callback into your extension.
In the case of the authentication provider, I use it to retrieve the token that gets passed from the callback, but you can use the registerUriHandler for many more scenarios. You can, for instance, integrate a callback from your website into VS Code. Execute scripts that open a file/content you want to get processed by your extension.
How to use the registerUriHandler
It is relatively simple to create your own URI handler. All you need is the following code:
info The logic in the handleUri is up to you/your extension.
Calling back to your extension
To trigger the handleUri method, you need to trigger it from the following URL
In the case of my example, I use the following URL:
vscode://eliostruyf.vscode-urihandler-test?say=How are you doing?, which results in the subsequent notification: