Question

如何处理颤振中的异常？为什么我不能有 response.data？ ………………………………………………………………………………………………………………………………………………………………………………………… rhtrhehrh regjnoeriwjgnowiermnfgorewmfelrg

Future addFine(String apiToken, String uin, int type) async {
    try {
      Response response = await _dio.post(apiEndpoint + "fines",
          options: Options(headers: {"Authorization": apiToken}),
          data: {"uin": uin, "type": type});
          print(response.data);
          print(response.statusMessage);
          print(response.statusCode);
    } catch (error, stacktrace) {
   
      print(error);
      print(stacktrace);
      return null;
    }
  }

my stack trace

I/flutter ( 5580): DioError [DioErrorType.RESPONSE]: Http status error [422]
    I/flutter ( 5580): #0      DioMixin._dispatchRequest (package:dio/src/dio.dart:966:7)
    I/flutter ( 5580): <asynchronous suspension>
    I/flutter ( 5580): #1      DioMixin._request._interceptorWrapper.<anonymous closure>.<anonymous closure>.<anonymous closure> (package:dio/src/dio.dart:849:37)
    I/flutter ( 5580): #2      DioMixin.checkIfNeedEnqueue (package:dio/src/dio.dart:1121:22)
    I/flutter ( 5580): #3      DioMixin._request._interceptorWrapper.<anonymous closure>.<anonymous closure> (package:dio/src/dio.dart:846:22)
    I/flutter ( 5580): #4      new Future.<anonymous closure> (dart:async/future.dart:175:37)
    I/flutter ( 5580): #5      _rootRun (dart:async/zone.dart:1182:47)
    I/flutter ( 5580): #6      _CustomZone.run (dart:async/zone.dart:1093:19)
    I/flutter ( 5580): #7      _CustomZone.runGuarded (dart:async/zone.dart:997:7)
    I/flutter ( 5580): #8      _CustomZone.bindCallbackGuarded.<anonymous closure> (dart:async/zone.dart:1037:23)
    I/flutter ( 5580): #9      _rootRun (dart:async/zone.dart:1190:13)
    I/flutter ( 5580): #10     _CustomZone.run (dart:async/zone.dart:1093:19)
    I/flutter ( 5580): #11     _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:1021:23)
    I/flutter ( 5580): #12    

 Timer._createTimer.<anonymous closure> (dart:async-patch/timer_patch.dart:18:15

Answer 1

如果您认为代码表明错误是有效信息并且无论如何都想访问该信息，您可以自己决定，您认为什么是错误：

Response response = await _dio.post(apiEndpoint + "fines",
      options: Options( 
                   headers: {"Authorization": apiToken}, 
                   validateStatus: (status) => true),
      data: {"uin": uin, "type": type});

在选项中，您可以传递一个确定哪些状态代码有效的验证器。在这种情况下，我只是让它使用任何代码。任何代码。您可能希望将其进一步限制在您的用例中，甚至可能是每次调用。例如，您可以将其限制为“OK”和“Unprocessable Entity”，例如 401 仍会引发异常：

validateStatus: (status) => { return status == 200 || status == 422; }

如何处理颤振中的异常

1 个答案: