Fail to load oauth2/authorize page

Thanks for the report. We're looking into it.

Ok, the /authorize page should be behaving properly now, and returning useful error messages.

For example, in this case, you should get:

"More details for developers

Invalid redirect_uri: "x-agent://dropbox_callback": When response_type=code, redirect_uri must start with "https://", unless it's a localhost URI."

I am with almost the same problem...

Invalid redirect_uri. When response_type=code, redirect_uri must start with "https://", unless it's a localhost URI.

Hi Fábio, can you elaborate on the issue you're seeing? It sounds like you are properly seeing the error message on the /authorize page. OAuth 2 redirect URIs for the "code" flow do need to start with "https://", unless it's a localhost address.

Gregory, the thing is.
I am trying to install the R package "rdrop2" in a server here.
When I try the command:
dropbox_credentials <-
drop_auth()
drop_auth(new_user = T, key="mykey", secret="mysecretcode", cache=TRUE) ##

I already have created the app in Dropbox

The shell send me the follow message:

> drop_auth()
httpuv not installed, defaulting to out-of-band authentication
Please point your browser to the following url:

https://www.dropbox.com/1/oauth2/authorize?client%5Fid=mmhfsybffdom42w&scope=&redirect%5Furi=urn%3Aietf%3Awg%3Aoauth%3A2%2E0%3Aoob&response%5Ftype=code

Enter authorization code: ????

But I am not able to access this page...

The redirect_uri being supplied in that /authorize URL is: "urn:ietf:wg:oauth:2.0:oob". That doesn't start with https://, and as such isn't allowed by Dropbox's OAuth 2 implementation, per the error message. You'll need to use an https:// (or localhost) redirect URI instead. 

If it's helpful for your case, Dropbox provides a receiver page at: https://www.dropbox.com/1/oauth2/redirect_receiver

I discovered that I did not have this package:

# install from CRAN
install.packages("httpuv")

Now, it is working, and it is authenticating automaticly.

Thank you Gregory.