flutter_web_auth 0.1.1

  • readme.md
  • changelog.md
  • Example
  • Installing
  • Versions
  • 81

Web Auth for Flutter #

A Flutter plugin for authenticating a user with a web service, even if the web service is run by a third party. Most commonly used with OAuth2, but can be used with any web flow that can redirect to a custom scheme.

In the background, this plugin uses ASWebAuthenticationSession on iOS 12 and newer, SFAuthenticationSession on iOS 11, and Chrome Custom Tabs on Android.


Usage #

To authenticate against your own custom site:

import 'package:flutter_web_auth/flutter_web_auth.dart';

// Present the dialog to the user
final result = await FlutterWebAuth.authenticate(url: "https://my-custom-app.com/connect", callbackUrlScheme: "my-custom-app");

// Extract token from resulting url
final token = Uri.parse(result).queryParameters['token']

To authenticate the user using Google's OAuth2:

import 'package:flutter_web_auth/flutter_web_auth.dart';

import 'dart:convert' show jsonDecode;
import 'package:http/http.dart' as http;

// App specific variables
final googleClientId = 'XXXXXXXXXXXX-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.apps.googleusercontent.com';
final callbackUrlScheme = 'com.googleusercontent.apps.XXXXXXXXXXXX-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx';

// Construct the url
final url = Uri.https('accounts.google.com', '/o/oauth2/v2/auth', {
  'response_type': 'code',
  'client_id': googleClientId,
  'redirect_uri': '$callbackUrlScheme:/',
  'scope': 'email',

// Present the dialog to the user
final result = await FlutterWebAuth.authenticate(url: url.toString(), callbackUrlScheme: callbackUrlScheme);

// Extract code from resulting url
final code = Uri.parse(result).queryParameters['code'];

// Use this code to get an access token
final response = await http.post('https://www.googleapis.com/oauth2/v4/token', body: {
  'client_id': googleClientId,
  'redirect_uri': '$callbackUrlScheme:/',
  'grant_type': 'authorization_code',
  'code': code,

// Get the access token from the response
final accessToken = jsonDecode(response.body)['access_token'] as String;

Setup #

Setup works as for any Flutter plugin, expect the Android caveat outlined below:

Android #

In order to capture the callback url, the following activity needs to be added to your AndroidManifest.xml. Be sure to relpace YOUR_CALLBACK_URL_SCHEME_HERE with your actual callback url scheme.


    <activity android:name="com.linusu.flutter_web_auth.CallbackActivity" >
      <intent-filter android:label="flutter_web_auth">
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data android:scheme="YOUR_CALLBACK_URL_SCHEME_HERE" />


0.1.1 #

  • ๐Ÿ› Add swift_version to the Podspec
  • ๐Ÿ› Update Gradle and Kotlin versions
  • ๐Ÿ› Add missing link in readme

0.1.0 #

  • ๐ŸŽ‰ Add initial implementation


flutter_web_auth_example #

Demonstrates how to use the flutter_web_auth plugin.

Getting Started #

This project is a starting point for a Flutter application.

A few resources to get you started if this is your first Flutter project:

For help getting started with Flutter, view our online documentation, which offers tutorials, samples, guidance on mobile development, and a full API reference.

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  flutter_web_auth: ^0.1.1

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:flutter_web_auth/flutter_web_auth.dart';
Version Uploaded Documentation Archive
0.1.1 Apr 1, 2019 Go to the documentation of flutter_web_auth 0.1.1 Download flutter_web_auth 0.1.1 archive
0.1.0 Mar 15, 2019 Go to the documentation of flutter_web_auth 0.1.0 Download flutter_web_auth 0.1.0 archive
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Learn more about scoring.

We analyzed this package on Jun 17, 2019, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.3.2
  • pana: 0.12.18
  • Flutter: 1.5.4-hotfix.2


Detected platforms: Flutter

References Flutter, and has no conflicting libraries.

Health suggestions

Format lib/flutter_web_auth.dart.

Run flutter format to format lib/flutter_web_auth.dart.

Maintenance issues and suggestions

Support latest dependencies. (-5 points)

The version constraint in pubspec.yaml does not support the latest published versions for 1 dependency.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.1.0 <3.0.0
flutter 0.0.0
Transitive dependencies
collection 1.14.11
meta 1.1.6 1.1.7
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8
Dev dependencies