Question 1

How to use Flutter OAuth with Google Sign-In?

Accepted Answer

Configure Flutter OAuth with Google's OAuth endpoints: set authorization URL to https://accounts.google.com/o/oauth2/v2/auth and token URL to https://oauth2.googleapis.com/token, and add required scopes. Note that Google often uses PKCE, which isn't mentioned in the package, so you might need custom handling.

Question 2

Flutter OAuth vs flutter_appauth: which is better?

Accepted Answer

Flutter OAuth offers more flexibility for custom APIs like GitHub, while flutter_appauth provides built-in support for providers like Google with PKCE and easier setup. Choose based on whether you need fine-grained control or quicker social logins.

Question 3

How to handle token expiration with Flutter OAuth?

Accepted Answer

The package doesn't support automatic token refresh. You'll need to monitor token expiration manually and use refresh tokens (if provided by the API) to request new access tokens by reconfiguring the OAuth flow.

Question 4

Does Flutter OAuth support PKCE for OAuth 2.0?

Accepted Answer

No, the README doesn't mention PKCE support. It focuses on basic authorization code flow, so for APIs requiring PKCE, consider alternative packages or extend Flutter OAuth with custom code.

Question 5

How to set up a custom redirect URI in Flutter for OAuth?

Accepted Answer

Specify the redirect URI in the Config constructor, e.g., http://localhost:8080. Ensure your OAuth provider allows this URI, and handle the callback in your app using the webview or deep linking, as the package relies on the Flutter Webview plugin.

Question 6

Can I use Flutter OAuth with Firebase Authentication?

Accepted Answer

Not directly, as Firebase Auth uses its own SDK. Flutter OAuth is for generic OAuth providers; for Firebase, use the official firebase_auth package which handles OAuth internally with pre-built UI components.

OAuth

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