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Dropbox custom URL scheme
I am developing an expo app. It needs to redirect back to the app after users have given authentication. When I was using expo go for basic testing this seemed to work fine but now that I am testing ...
Thank you for your response. I have attempted using 'db-<APP KEY>' with my actual app key and I am still not redirected to the mobile app. The allow button is greyed out. Do you have any other ideas?
Greg-DB
Dropbox Community Moderator
Dropbox Community Moderatorsquidlauncher64 It is possible to use a custom URI scheme with the Dropbox OAuth app authorization flow, using the code flow with PKCE. For example, I just tried this out with an authorization URL like this:
https://www.dropbox.com/oauth2/authorize?client_id=APPKEYHERE&response_type=code&redirect_uri=customscheme://redirect&code_challenge=CODECHALLENGEVALUEHERE&code_challenge_method=plain
Dropbox did then return the redirect to the "customscheme://redirect" redirect URI, as you can see in this screenshot:
I don't actually have an installed app registered for the "customscheme://" scheme though, so my browser accordingly reported the NS_ERROR_UNKNOWN_PROTOCOL error for that network request, and the "Allow" button is left disabled.
It sounds like that's what's happening in your case; Dropbox is attempting to perform the redirect requested, but your system was unable to process that URL scheme for whatever reason.
Exactly how you register your custom URL scheme will depend on your platform, but that's outside the scope of Dropbox API support so I can't offer insight on that. You may need to refer to the documentation or support resources for your platform for information on how to set that up.
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