0.0.0

.gitignore

@@ -25,3 +25,5 @@ doc/api/
 # Don't commit pubspec lock file 
 # (Library packages only! Remove pattern if developing an application package)
 pubspec.lock
+
+log.txt

README.md

@@ -1,2 +1,4 @@
 # auth_oauth2
+[![version 0.0.0](https://img.shields.io/badge/pub-v0.0.0-red.svg)](https://pub.dartlang.org/packages/angel_auth_oauth2)
+
 angel_auth strategy for OAuth2 login, i.e. Facebook.

example/basic.dart

@@ -0,0 +1,54 @@
+import 'dart:convert';
+import 'dart:io';
+import 'package:angel_auth/angel_auth.dart';
+import 'package:angel_diagnostics/angel_diagnostics.dart';
+import 'package:angel_framework/angel_framework.dart';
+import 'package:angel_auth_oauth2/angel_auth_oauth2.dart';
+import 'package:oauth2/oauth2.dart' as oauth2;
+
+const Map<String, String> OAUTH2_CONFIG = const {
+  'callback': '<callback-url>',
+  'key': '<client-id>',
+  'secret': '<my-secret>',
+  'authorizationEndpoint': '<auth-url>',
+  'tokenEndpoint': '<token-url>'
+};
+
+main() async {
+  var app = new Angel()..use('/users', new MemoryService<User>());
+
+  var auth = new AngelAuth(jwtKey: 'oauth2 example secret', allowCookie: false);
+  auth.deserializer =
+      (String idStr) => app.service('users').read(int.parse(idStr));
+  auth.serializer = (User user) async => user.id;
+
+  auth.strategies.add(new OAuth2Strategy('example_site', OAUTH2_CONFIG,
+      (oauth2.Client client) async {
+    var response = await client.get('/link/to/user/profile');
+    return JSON.decode(response.body);
+  }));
+
+  app.get('/auth/example_site', auth.authenticate('example_site'));
+  app.get(
+      '/auth/example_site/callback',
+      auth.authenticate('example_site',
+          new AngelAuthOptions(callback: (req, res, jwt) async {
+        // In real-life, you might include a pop-up callback script
+        res.write('Your JWT: $jwt');
+      })));
+
+  await app.configure(auth);
+  await app.configure(logRequests(new File('log.txt')));
+  await app.configure(profileRequests());
+
+  var server = await app.startServer(InternetAddress.LOOPBACK_IP_V4, 3000);
+  print('Listening on http://${server.address.address}:${server.port}');
+}
+
+class User extends MemoryModel {
+  String example_siteId;
+
+  User({int id, this.example_siteId}) {
+    this.id = id;
+  }
+}

lib/angel_auth_oauth2.dart

@@ -0,0 +1,114 @@
+library angel_auth_oauth2;
+
+import 'dart:async';
+import 'package:angel_auth/angel_auth.dart';
+import 'package:angel_framework/src/http/response_context.dart';
+import 'package:angel_framework/src/http/request_context.dart';
+import 'package:angel_validate/angel_validate.dart';
+import 'package:oauth2/oauth2.dart' as oauth2;
+
+/// Loads a user profile via OAuth2.
+typedef Future ProfileLoader(oauth2.Client client);
+
+final Validator OAUTH2_OPTIONS_SCHEMA = new Validator({
+  'key*': isString,
+  'secret*': isString,
+  'authorizationEndpoint*': isString,
+  'tokenEndpoint*': isString,
+  'callback*': isString,
+  'scopes': new isInstanceOf<Iterable<String>>()
+}, defaultValues: {
+  'scopes': <String>[]
+}, customErrorMessages: {
+  'scopes': "'scopes' must be an Iterable of strings. You provided: {{value}}"
+});
+
+class AngelAuthOauth2Options {
+  String key, secret, authorizationEndpoint, tokenEndpoint, callback;
+  Iterable<String> scopes;
+
+  AngelAuthOauth2Options(
+      {this.key,
+      this.secret,
+      this.authorizationEndpoint,
+      this.tokenEndpoint,
+      this.callback,
+      Iterable<String> scopes: const []}) {
+    this.scopes = scopes ?? [];
+  }
+
+  factory AngelAuthOauth2Options.fromJson(Map json) =>
+      new AngelAuthOauth2Options(
+          key: json['key'],
+          secret: json['secret'],
+          authorizationEndpoint: json['authorizationEndpoint'],
+          tokenEndpoint: json['tokenEndpoint'],
+          callback: json['callback'],
+          scopes: json['scopes'] ?? <String>[]);
+
+  Map<String, String> toJson() {
+    return {
+      'key': key,
+      'secret': secret,
+      'authorizationEndpoint': authorizationEndpoint,
+      'tokenEndpoint': tokenEndpoint,
+      'callback': callback,
+      'scopes': scopes.toList()
+    };
+  }
+}
+
+class OAuth2Strategy implements AuthStrategy {
+  String _name;
+  AngelAuthOauth2Options _options;
+  final ProfileLoader profileLoader;
+
+  @override
+  String get name => _name;
+
+  @override
+  set name(String value) => _name = name;
+
+  /// [options] can be either a `Map` or an instance of [AngelAuthOauth2Options].
+  OAuth2Strategy(this._name, options, this.profileLoader) {
+    if (options is AngelAuthOauth2Options)
+      _options = options;
+    else if (options is Map)
+      _options = new AngelAuthOauth2Options.fromJson(
+          OAUTH2_OPTIONS_SCHEMA.enforce(options));
+    else
+      throw new ArgumentError('Invalid OAuth2 options: $options');
+  }
+
+  oauth2.AuthorizationCodeGrant createGrant() =>
+      new oauth2.AuthorizationCodeGrant(
+          _options.key,
+          Uri.parse(_options.authorizationEndpoint),
+          Uri.parse(_options.tokenEndpoint),
+          secret: _options.secret);
+
+  @override
+  Future authenticate(RequestContext req, ResponseContext res,
+      [AngelAuthOptions options]) async {
+    if (options != null) return authenticateCallback(req, res, options);
+
+    var grant = createGrant();
+    res.redirect(grant
+        .getAuthorizationUrl(Uri.parse(_options.callback),
+            scopes: _options.scopes)
+        .toString());
+    return false;
+  }
+
+  Future authenticateCallback(RequestContext req, ResponseContext res,
+      [AngelAuthOptions options]) async {
+    var grant = createGrant();
+    await grant.getAuthorizationUrl(Uri.parse(_options.callback),
+        scopes: _options.scopes);
+    var client = await grant.handleAuthorizationResponse(req.query);
+    return await profileLoader(client);
+  }
+
+  @override
+  Future<bool> canLogout(RequestContext req, ResponseContext res) async => true;
+}

pubspec.yaml

@@ -0,0 +1,13 @@
+name: angel_auth_oauth2
+description: angel_auth strategy for OAuth2 login, i.e. Facebook.
+version: 0.0.0
+author: Tobe O <thosakwe@gmail.com>
+environment:
+    sdk: ">=1.19.0"
+homepage: https://github.com/angel-dart/auth_oauth2.git
+dependencies:
+    angel_auth: ^1.0.0-dev
+    angel_validate: ^1.0.0-beta
+    oauth2: ^1.0.0
+dev_dependencies:
+    angel_diagnostics: ^1.0.0-dev