114 lines
3.4 KiB
Dart
114 lines
3.4 KiB
Dart
library angel_auth_oauth2;
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import 'dart:async';
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import 'package:angel_auth/angel_auth.dart';
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import 'package:angel_framework/src/http/response_context.dart';
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import 'package:angel_framework/src/http/request_context.dart';
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import 'package:angel_validate/angel_validate.dart';
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import 'package:oauth2/oauth2.dart' as oauth2;
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/// Loads a user profile via OAuth2.
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typedef Future OAuth2Verifier(oauth2.Client client);
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final Validator OAUTH2_OPTIONS_SCHEMA = new Validator({
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'key*': isString,
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'secret*': isString,
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'authorizationEndpoint*': isString,
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'tokenEndpoint*': isString,
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'callback*': isString,
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'scopes': new isInstanceOf<Iterable<String>>()
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}, defaultValues: {
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'scopes': <String>[]
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}, customErrorMessages: {
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'scopes': "'scopes' must be an Iterable of strings. You provided: {{value}}"
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});
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class AngelAuthOAuth2Options {
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String key, secret, authorizationEndpoint, tokenEndpoint, callback;
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Iterable<String> scopes;
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AngelAuthOAuth2Options(
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{this.key,
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this.secret,
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this.authorizationEndpoint,
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this.tokenEndpoint,
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this.callback,
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Iterable<String> scopes: const []}) {
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this.scopes = scopes ?? [];
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}
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factory AngelAuthOAuth2Options.fromJson(Map json) =>
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new AngelAuthOAuth2Options(
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key: json['key'],
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secret: json['secret'],
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authorizationEndpoint: json['authorizationEndpoint'],
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tokenEndpoint: json['tokenEndpoint'],
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callback: json['callback'],
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scopes: json['scopes'] ?? <String>[]);
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Map<String, String> toJson() {
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return {
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'key': key,
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'secret': secret,
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'authorizationEndpoint': authorizationEndpoint,
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'tokenEndpoint': tokenEndpoint,
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'callback': callback,
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'scopes': scopes.toList()
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};
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}
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}
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class OAuth2Strategy implements AuthStrategy {
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String _name;
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AngelAuthOAuth2Options _options;
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final OAuth2Verifier verifier;
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@override
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String get name => _name;
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@override
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set name(String value) => _name = name;
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/// [options] can be either a `Map` or an instance of [AngelAuthOAuth2Options].
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OAuth2Strategy(this._name, options, this.verifier) {
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if (options is AngelAuthOAuth2Options)
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_options = options;
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else if (options is Map)
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_options = new AngelAuthOAuth2Options.fromJson(
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OAUTH2_OPTIONS_SCHEMA.enforce(options));
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else
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throw new ArgumentError('Invalid OAuth2 options: $options');
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}
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oauth2.AuthorizationCodeGrant createGrant() =>
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new oauth2.AuthorizationCodeGrant(
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_options.key,
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Uri.parse(_options.authorizationEndpoint),
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Uri.parse(_options.tokenEndpoint),
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secret: _options.secret);
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@override
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Future authenticate(RequestContext req, ResponseContext res,
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[AngelAuthOptions options]) async {
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if (options != null) return authenticateCallback(req, res, options);
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var grant = createGrant();
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res.redirect(grant
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.getAuthorizationUrl(Uri.parse(_options.callback),
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scopes: _options.scopes)
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.toString());
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return false;
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}
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Future authenticateCallback(RequestContext req, ResponseContext res,
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[AngelAuthOptions options]) async {
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var grant = createGrant();
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await grant.getAuthorizationUrl(Uri.parse(_options.callback),
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scopes: _options.scopes);
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var client = await grant.handleAuthorizationResponse(req.query);
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return await verifier(client);
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}
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@override
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Future<bool> canLogout(RequestContext req, ResponseContext res) async => true;
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}
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