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oauth_manager

OAuth2 is a widely used protocol for authentication and authorization. There are many providers that support OAuth2 authentication. Here is a list of some popular providers that support OAuth2 authentication:

  • Google
  • Facebook
  • Twitter
  • Github
  • LinkedIn
  • Microsoft
  • Amazon

Each of these providers has their own specific OAuth2 implementation, but the general flow of the protocol is the same. You will need to provide the appropriate configuration information for each provider, such as the clientID, clientSecret, authorizationEndpoint, tokenEndpoint, and scopes.

To use the oauth2_manager package with a specific provider, you will need to consult the provider's documentation to obtain the necessary configuration information. Once you have that information, you can create an instance of the OAuth2Configuration class and pass in the appropriate parameters.

Usage

Authorization Code Grant

To use the Authorization Code Grant flow, first create an instance of the OAuth2Configuration class and pass in the parameters:

import 'package:oauth2_manager/oauth2_manager.dart';

final oauth2Configuration = OAuth2Configuration(
  clientID: '<client ID>',
  clientSecret: '<client secret>',
  authorizationEndpoint: '<authorization endpoint>',
  tokenEndpoint: '<token endpoint>',
  scopes: ['<scope>'],
);

call the login method and pass in the oauth2Configuration, redirect, redirectPage, contentType:

final credentials = await OAuth2.login(
  oauth2Configuration,
  redirect: (uri) async {
    // Open the authorization URL in the user's browser
    // Example: await launch('$uri');
  },
  redirectPage: '<the page.html to display after authorization>',
  contentType: '<content type of redirectPage>',
);

Refresh Token Grant

To use the Refresh Token Grant flow, call the getRefreshToken method and pass in the refresh token and other parameters:

final newCredentials = await OAuth2.getRefreshToken(
  refreshToken,
  newScopes: ['<new scope>'],
  clientID: oauth2Configuration.clientID,
  clientSecret: oauth2Configuration.clientSecret!,
  tokenEndpoint: oauth2Configuration.tokenEndpoint,
);

The Credentials class returned by login and getRefreshToken has the following properties:

  • accessToken: the access token
  • refreshToken: the refresh token
  • idToken: the ID token type [jwt]
  • expiration: the expiration date/time of the access token
  • isExpired: a boolean indicating whether the access token has expired
  • canRefresh: a boolean indicating whether the access token can be refreshed

Installation

To use this package, add oauth2_manager as a dependency in your pubspec.yaml file.

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