iOS Question How to do Dropbox Authentication now that WebView is not allowed?

[Turbo3]

My B4i app that used Webview to do Dropbox authentication has stopped working now that that method is considered a security risk by Dropbox.

Can someone share their B4i Dropbox authentication code that does not use WebView? Thanks.

 

[Erel]

An example of OAuth2 authentication with Google is available here: https://www.b4x.com/android/forum/threads/class-b4x-google-oauth2.79426/

The relevant documentation is here: https://www.dropbox.com/developers/documentation/http/documentation
You can start with omitting the redirect_uri parameter and let the user copy the code and paste it in your app.

 

[Turbo3]

Thanks Erel.

If I understand the high level flow, the "App.OpenURL(url)" line will open the Dropbox authentication web page I point it to and the "Application_OpenURL(url)" routine will be called with the resulting access token (or not if it fails) in the returned url.

 

[Erel]

and the "Application_OpenURL(url)" routine will be called with the resulting access token (or not if it fails) in the returned url.

Yes, if you set the redirect_uri to a scheme supported by your app.

 

[martin24]

If I understand the high level flow, the "App.OpenURL(url)" line will open the Dropbox authentication web page

You should use the SafariController instead of "App.OpenURL(url)".

My app was rejected with "App.OpenURL(url)" and I had to switch to SafariController to link with Dropbox.

 

[Turbo3]

Here is the line of code that opens the web page in Safari which works fine.

Main.App.OpenURL("https://www.dropbox.com/oauth2/authorize?client_id="&Main.key&"&response_type=token&redirect_uri=http://127.0.0.1/")

The Dropbox authorization page opens and I can login and allow my app access but at that point Safari gives the error "Safari cannot open the page because it could not connect to the server." with 127.0.0.1 being the page it is trying to open.

How do I get 127.0.0.1 connected to my app so App.OpenURL gets called?

What should #UrlScheme be set to?

 

[Turbo3]

I tried adding this code to tell the system to send the response to my app but it did not help.

#UrlScheme: 127.0.0.1

 

[Erel]

I tried adding this code to tell the system to send the response to my app but it did not help.

This cannot work. See how it is done in the Google example.

It should be something like:

#UrlScheme: your.package.name

And the redirect uri should be: your.package.name://test

 

[Turbo3]

With those changes it now works. Thank you very much Erel.

 

[Turbo3]

You should use the SafariController instead of "App.OpenURL(url)".

My app was rejected with "App.OpenURL(url)" and I had to switch to SafariController to link with Dropbox.

This was not the case for me. I just released my updated code using "App.OpenUrL(url)" with no problems. In fact from upload to iTunes to ready for sale was under 10 minutes including review. The fastest I have ever seen.