dioError [dioerrortype.other]：将对象转换为编码对象失败：_linkedHashset len：1 flutter

Question

我想从API打印数据，但我在下面遇到此错误： DioError [dioerrortype.Response]：HTTP状态错误[500]

检查以下邮递员的屏幕截图，它运行良好。

以下是我的代码，我需要帮助。当我在下面调用此功能时，我会遇到错误：

Future<void> signInData([data]) async {
    final prefs = await SharedPreferences.getInstance();
    final String token = prefs.getString('token') ?? "";

    try {
      Response response = await _dio.post('$_baseUrl/api/gateway',
          data: {
            {
              "ClientPackageId": "0cdd231a-d7ad-4a68-a934-d373affb5100",
              "PlatformId": "ios",
              "ClientUserId": "AhmedOmar",
              "VinNumber": VINumber
            }
          },
          options: Options(headers: {
            "Content-Type": "application/json",
            "Authorization": "Bearer $token",
          }));
      print(response.data);
      print(response.statusCode);
      if (response.statusCode == 401) {
        // call your refresh token api here and save it in shared preference
        await getToken();
        signInData(data);
      }
    } catch (e) {
      print(e);
    }
  }

Answer 1

嗨

Future<void> signInData([data]) async {
    final prefs = await SharedPreferences.getInstance();
    final String token = prefs.getString('token') ?? "";

    try {
      Response response = await _dio.post('$_baseUrl/api/gateway',
          data: {
              "ClientPackageId": "0cdd231a-d7ad-4a68-a934-d373affb5100",
              "PlatformId": "ios",
              "ClientUserId": "AhmedOmar",
              "VinNumber": VINumber            
          },
          options: Options(headers: {
            "Content-Type": "application/json",
            "Authorization": "Bearer $token",
          }));
      print(response.data.toString());
      print(response.statusCode);
      if (response.statusCode == 401) {
        // call your refresh token api here and save it in shared preference
        await getToken();
        signInData(data);
      }
    } catch (e) {
      print(e);
    }
  }