使用颤振对 google api（日历）进行身份验证答案

【问题标题】：Authentication on google api (calendar) with flutter使用颤振对 google api（日历）进行身份验证
【发布时间】：2020-10-08 23:10:42
【问题描述】：

我尝试使用 google calendar api 检索事件

import 'package:googleapis_auth/auth_io.dart';
import 'package:http/http.dart' as http;
import 'package:googleapis/calendar/v3.dart' as calendarapi;

...

class _MyHomePageState extends State<MyHomePage> {

  final accountCredentials = new ServiceAccountCredentials.fromJson(
    {
    "private_key_id": "562ab...",
    "private_key": "-----BEGIN PRIVATE KEY--............----END PRIVATE KEY-----\n",
    "client_email": "xxx@xxx.iam.gserviceaccount.com",
    "client_id": "1073.......",
    "type": "service_account",
    "project_id": "myapi"
   }
  );

  final scopes = [calendarapi.CalendarApi.CalendarScope];
  final client = new http.Client();
 

  void getCalendarEvents() { 
      clientViaServiceAccount(accountCredentials, scopes).then((client) {
        var calendar = new calendarapi.CalendarApi(client);
        var calEvents = calendar.events.list("primary");
        calEvents.then((calendarapi.Events events) {
          events.items.forEach((calendarapi.Event event) {print(event.summary);});
        });
          client.close();
      });
  }
}

...

  @override
  void initState() {
    super.initState();
    getCalendarEvents();
  }

clientViaServiceAccount 行抛出异常

FormatException（FormatException：输入意外结束）

凭据应该没问题，因为我已经在不同的客户端中使用了它们。在提琴手中没有传出流量，因此即使在请求发送之前看起来也存在错误。代码有什么问题？

编辑

这是错误的堆栈

══╡ FLUTTER 测试框架════════════════════════════════ ═══════════════以下运行测试时抛出 FormatException：输入意外结束

当异常被抛出时，这是堆栈： #0 _ChunkedJsonParser.fail (dart:convert-patch/convert_patch.dart:1392:5) #1 _ChunkedJsonParser.close (dart:convert-patch/convert_patch.dart:510:7) #2 _JsonStringDecoderSink.close (dart:convert-patch/convert_patch.dart:1487:13) #3 _ConverterStreamEventSink.close (dart:convert/chunked_conversion.dart:80:18) #15 _StringAdapterSink.close (dart:convert/string_conversion.dart:249:11) #16 _Utf8ConversionSink.close (dart:convert/string_conversion.dart:300:20) #17 _ConverterStreamEventSink.close (dart:convert/chunked_conversion.dart:80:18) #46 AutomatedTestWidgetsFlutterBinding.pump。（包：flutter_test/src/binding.dart:855:25） #49 TestAsyncUtils.guard (package:flutter_test/src/test_async_utils.dart:69:41) #50 AutomatedTestWidgetsFlutterBinding.pump (package:flutter_test/src/binding.dart:840:27) #51 WidgetTester.pumpWidget。（包：flutter_test/src/widget_tester.dart:318:22） #54 TestAsyncUtils.guard (package:flutter_test/src/test_async_utils.dart:69:41) #55 WidgetTester.pumpWidget (package:flutter_test/src/widget_tester.dart:315:27) ＃56主要。 (file:///C:/projekte/flutter_garden/flutter_garden/test/widget_test.dart:9:18) ＃58主要。 (file:///C:/projekte/flutter_garden/flutter_garden/test/widget_test.dart:7:43) #59 testWidgets..（包：flutter_test/src/widget_tester.dart:119:25） #61 testWidgets..（包：flutter_test/src/widget_tester.dart:117:9） #62 TestWidgetsFlutterBinding._runTestBody (package:flutter_test/src/binding.dart:648:19) #76 AutomatedTestWidgetsFlutterBinding.runTest。（包：flutter_test/src/binding.dart:1032:17） #78 AutomatedTestWidgetsFlutterBinding.runTest。（包：flutter_test/src/binding.dart:1020:35）（省略了 74 帧 _FakeAsync 类、dart:async 包、dart:async-patch 包和包堆栈跟踪）

【问题讨论】：

我不知道你是否复制了整个代码，但我马上可以看到，在交互后客户端没有右括号`_MyHomePageState, you might want to check on that. If I understood correctly your code is not even executing? Or is the error part of the client getting to the google server. I would say that you already did but if not read [the following page](https://github.com/dart-lang/googleapis_auth), in there is recommended to close`。
我更新了代码。 client.close() 没有改变结果。 getCalendarEvents 在 initState 中调用
但是您的代码是否还在执行/编译？你有没有办法检查你是否向谷歌服务器发出请求？
是的，我通过颤振单元测试运行代码，它正在点击 getCalendarEvents -> clientViaServiceAccount

标签： flutter oauth-2.0 google-api google-calendar-api

【解决方案1】：

通过模拟器而不是单元测试运行代码解决了这个问题。

【讨论】：