Getting refresh token for shiny app using rdrop2 and drop_auth()

Hi rs123,

Seems you are using unsupported SDK. Regular access tokens expire in 4 hours as you noted.

---

rs123 wrote:

...

NB: I am aware that dropbox no longer allow tokens with no expiry (as of September 2021) so I need to go down the refresh token route.

---

Not exactly! Existing long lived access tokens (if you have any) keep validity. You can't create new such token; all new access tokens are short lived (but only access tokens). It's not the same for refresh tokens; they are without due date!

I don't know what exactly is available in your environment, but if there isn't newer version of the SDK, used by you, and supported SDKs can not be used in your case, you have to manage direct access points call (to receive and manage tokens, at least). You should make sure authorization rules are followed strictly and selected token type is "offline". So aside of the regular access token your application will receive refresh token too. When the due date gets close, you can use received refresh token to get a new regular access token in a /oauth2/token call. This should repeat on regular basis whenever need. The rest of the code could work without change with ensured valid access token. That's it.

Hope this helps.