Dropbox API - Invalid redirect URI (Error 400) with React Native Expo

[kkanchev94]

I am building a React native app and trying to integrate the Dropbox API.

I'm following expo's app auth guide: https://docs.expo.dev/guides/authentication/#dropbox

and I have the App registered with a scheme in the redirect URI's as: com.kkanchev94.esignapp://oauth

and the same one registered and build with that scheme in the mobile app, but I keep receiving the same error over and over.

Tried with with a different schemes - which I registered on the Dropbox API side as well, but without any luck.

Has anyone faced the same challenges with the invalid redirect URI for building on a mobile app and

how should I go about resolving it. Much appreciated!!

[kkanchev94]

I was able to figure it out, what you need to do is divide your scheme into two parts like such:

Scheme registered and built in the mobile app - com.kkanchev94.esignapp://oauth

Use the code from https://docs.expo.dev/guides/authentication/#dropbox

- on scheme divide your redirect URI as the following template:

 redirectUri: makeRedirectUri({

        scheme: "com.kkanchev94.esignapp",

        path: "oauth",

      }),

Omit the "://", it will be added automatically

Hope that helps, this is for an Expo built project.