MaikuB/flutter_appauth

AuthorizationServiceConfiguration.fromUrl support

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#614 opened on May 14, 2025

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enhancementhelp wanted

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Description

I am building a AppAuth service similar to #407 and i would like to have the option to use the fetchFromUrl() with the discovery url to load my service config as part of the service initialization, before atempting to log in with the service.

I saw the Android AppAuth library offers a fetchFromUrl function for the AuthorizationServiceConfiguration so maybe there could be option to add it here as well.

final FlutterAppAuth _appAuth = FlutterAppAuth();
Completer<void> oidcInitCompleter = Completer<void>();
late final String _clientId;
late final String _discoveryUrl;
late final String _redirectUrl;
AuthorizationServiceConfiguration? _serviceConfiguration;

AppAuthService() {
    _discoveryUrl = someDiscoveryURI;
    _clientId = someClientID;
    _redirectUrl = "someURI;
    /*  Wanted Feature:
   _serviceConfiguration = await  _appAuth.fetchFromUrl(_discoveryUrl);
   */
   oidcInitCompleter.future.then((value) => notifyListeners())
}

Contributor guide

Research direction
Study the existing AppAuth Flutter plugin structure, particularly how other platform specific methods are implemented via method channels, and examine the Android AppAuth library's fetchFromUrl method to port it to the Flutter plugin.
Tech stack
flutterdart
Domain
mobileauthenticationsecurity
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
FlutterDart
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60