【发布时间】：2020-12-28 04:07:46
【问题描述】：
我正在尝试将用户从我的 Flutter 应用程序登录到 Google API，但无法让它自动获取令牌。我得到的最接近的是在身份验证屏幕中看到令牌字符串，并被要求将其复制/粘贴回应用程序。我怀疑它与redirect_uri参数有关。
我尝试使用oauth2_client 和flutter_appauth，结果几乎相同。在设置客户端时，如果我使用 Google urn:ietf:wg:oauth:2.0:oob 提供的第一个 redirect_uri，在授予权限后，它会在身份验证屏幕中显示令牌并指示用户将其复制并粘贴回应用程序中。如果我使用我在 AndroidManifest.xml 和 build.gradle 中设置的 uri，而不是同意屏幕，我会在浏览器中收到以下消息：
"redirect_url 的参数值无效：缺少方案： ai.autonet.afterme"
最后，如果我使用"http://localhost"（Google 提供的第二个 uri），我会得到“请求超时”。
我在 Google 方面的客户端配置如下所示：
"client_id":"somethingsomething.apps.googleusercontent.com","project_id":"afterme-850af","auth_uri":"https://accounts.google.com/o/oauth2/auth","token_uri":"https://oauth2.googleapis.com/token","auth_provider_x509_cert_url":"https://www.googleapis.com/oauth2/v1/certs","redirect_uris":["urn:ietf:wg:oauth:2.0:oob","http://localhost"]
这里是最简单的flutter_appauth实现版本：
main.dart
import 'package:flutter/material.dart';
import 'package:flutter_appauth/flutter_appauth.dart';
import 'package:oauth2_client/access_token_response.dart';
import 'package:http/http.dart' as http;
const AUTH_ENDIPOINT = 'https://accounts.google.com/o/oauth2/auth';
const CLIENT_ID =
'somethingsomething.apps.googleusercontent.com';
const REDIRECT_URI = 'ai.autonet.afterme';
const TOKEN_ENDPOINT = "https://oauth2.googleapis.com/token";
var scopes = [
"https://www.googleapis.com/auth/youtube",
"https://www.googleapis.com/auth/youtube.upload",
];
void main() {
runApp(MyApp());
}
var httpClient = http.Client();
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
FlutterAppAuth appAuth = FlutterAppAuth();
authorize() async {
final AuthorizationTokenResponse result =
await appAuth.authorizeAndExchangeCode(AuthorizationTokenRequest(
CLIENT_ID, REDIRECT_URI,
serviceConfiguration: AuthorizationServiceConfiguration(
AUTH_ENDPOINT,
TOKEN_ENDPOINT),
scopes: scopes));
print(result.accessToken.toString());
}
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
getResources() async {
http.Response resp = await httpClient
.get('GET https://www.googleapis.com/youtube/v3/videos');
print(resp.body);
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
RaisedButton(
child: Text("Permission"), onPressed: () => widget.authorize()),
],
),
),
);
}
}
----------------------------------------------------------------
AndroidManifest.xml:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="ai.autonet.afterme">
<!-- io.flutter.app.FlutterApplication is an android.app.Application that
calls FlutterMain.startInitialization(this); in its onCreate method.
In most cases you can leave this as-is, but you if you want to provide
additional functionality it is fine to subclass or reimplement
FlutterApplication and put your custom class here. -->
<application
android:name="io.flutter.app.FlutterApplication"
android:label="afterme"
android:icon="@mipmap/ic_launcher">
<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="ai.autonet.afterme" />
</intent-filter>
</activity>
<activity
android:name=".MainActivity"
android:launchMode="singleTop"
android:theme="@style/LaunchTheme"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
android:hardwareAccelerated="true"
android:windowSoftInputMode="adjustResize">
<!-- Specifies an Android theme to apply to this Activity as soon as
the Android process has started. This theme is visible to the user
while the Flutter UI initializes. After that, this theme continues
to determine the Window background behind the Flutter UI. -->
<meta-data
android:name="io.flutter.embedding.android.NormalTheme"
android:resource="@style/NormalTheme"
/>
<!-- Displays an Android View that continues showing the launch screen
Drawable until Flutter paints its first frame, then this splash
screen fades out. A splash screen is useful to avoid any visual
gap between the end of Android's launch screen and the painting of
Flutter's first frame. -->
<meta-data
android:name="io.flutter.embedding.android.SplashScreenDrawable"
android:resource="@drawable/launch_background"
/>
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<!-- Don't delete the meta-data below.
This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
<meta-data
android:name="flutterEmbedding"
android:value="2" />
</application>
</manifest>
-------------------------------------------------------------------------------------
build.gradle:
...
defaultConfig {
applicationId "ai.autonet.afterme"
minSdkVersion 18
targetSdkVersion 29
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
manifestPlaceholders = [
'appAuthRedirectScheme': 'ai.autonet.afterme'
]
}
...
任何帮助都会受到重视。
【问题讨论】：
标签： android flutter google-oauth