Dart Dio 包`DioError``request` 对象未定义

Question

在 https://pub.dev/packages/dio#handling-errors 的 Dart Dio 包文档中描述了如何处理错误：

try {
  //404
  await dio.get('https://wendux.github.io/xsddddd');
} on DioError catch (e) {
  // The request was made and the server responded with a status code
  // that falls out of the range of 2xx and is also not 304.
  if (e.response) {
    print(e.response.data)
    print(e.response.headers)
    print(e.response.request)
  } else {
    // Something happened in setting up or sending the request that triggered an Error
    print(e.request)
    print(e.message)
  }
}

该代码很有意义，并为我提供了了解我的请求发生了什么所需的选项，但 Android Studio 中的 Dart 分析工具（我正在开发 Flutter 应用程序）对此反应强烈.

我可以按照 Android Studio 的建议，通过向代码添加空值检查来修复分析器的许多投诉：

try {
    var response = await dio.get(url, options: options);
    print('Response: $response');
    return response.data;
} on DioError catch (e) {
    // The request was made and the server responded with a status code
    // that falls out of the range of 2xx and is also not 304.
    if (e.response != null) {
      print(e.response!.data);
      print(e.response!.headers);
      print(e.response!.request);  <-- line 64
    } else {
      // Something happened in setting up or sending the request that triggered an Error
      print(e.request);  <-- line 67
      print(e.message);
    }
}

但分析器仍然抱怨 request 对象：

error: The getter 'request' isn't defined for the type 'Response<dynamic>'. (undefined_getter at [particle_cloud] lib\src\particle.dart:64)
error: The getter 'request' isn't defined for the type 'DioError'. (undefined_getter at [particle_cloud] lib\src\particle.dart:67)

我假设 DioError 应该定义了适当的请求对象，如何修复此代码以便它运行？

Answer 1

API 更改时，他们的自述文件未更新。新 API 中的 request 相当于 requestOptions。这可以通过查看 API reference.

轻松找到

print(e.requestOptions);

Dart Dio 包`DioError``request` 对象未定义

Dart Dio Package `DioError` `request` Object not defined

dart

dio