AuthorizationCodeInstalledApp should not use java.awt.Desktop

AuthorizationCodeInstalledApp uses java.awt.Deskopt to start an external webbrowser for user authentication. However, this renders authentication impossible in JavaFX applications as the application just freezes and no external browser window is opened. In JavaFX, for example, WebView might be preferable over an external browser. In general, it is preferable to not have to pull in awt classes when running JavaFX code.

One way around this would be to pass a handler to AuthorizationCodeInstalledApp to allow the caller to decide how to browse a URL.

[hanslovsky]

@mavrovgeorgi https://github.com/googleapis/google-oauth-java-client/pull/182 introduced a Browser interface that allows the caller to use a different way to open a browser than the standard awt way. I suggest you have a closer look at the changes in the PR.

[poppito]

Further to what @hanslovsky has suggested - you can do something like this (code is in kotlin)

    val browser = AuthorizationCodeInstalledApp.Browser {
            if (it != null) {
                val intent = Intent(Intent.ACTION_VIEW)
                intent.data = Uri.parse(it)
                startActivity(intent)
            }
        }

And this should be done on a background thread:

            AuthorizationCodeInstalledApp(
                flow, LocalServerReceiver()
            , browser).authorize("user")