Response.isSuccessfull() 为假

Question

帮帮我。我正在为我的项目使用改造，我是全新的。我收到以下错误。为什么我收到错误回复？

2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: Response
2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: 
Response{protocol=http/1.1, code=402, message=Payment Required, 
url=https://quizziyapa.herokuapp.com/getTopics}
2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: Payment Required
2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: okhttp3.ResponseBody@647c751
2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: null
2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: false
2020-02-20 15:35:26.230 22602-22602/q.goaldiggers.auth_api_testing 
D/Ayush: retrofit2.OkHttpCall$NoContentResponseBody@4f0bbb6
[Error][1]

JSON结构

这是我的 json 结构。

{
    "topics": [
        {
            "_id": 2,
            "topic": "abc",
            "imageUrl": "abc12345"
        },
        {
            "_id": 3,
            "topic": "abc",
            "imageUrl": "abc12345"
        }
    ]
}

Topic.java

我的模型class

public class Topic {
    int _id;
    String topic;
    String imageUrl;

    public Topic(int _id, String topic, String imageUrl) {
        this._id = _id;
        this.topic = topic;
        this.imageUrl = imageUrl;
    }

    public int getId() {
        return _id;
    }

    public String getTopic() {
        return topic;
    }

    public String getImageUrl() {
        return imageUrl;
    }
}

TopicResponse.java

JSON 回复 class

public class TopicResponse {
    @SerializedName("topics")
    Topic[] topics;

    public TopicResponse(Topic[] topics) {
        this.topics = topics;
    }

    public Topic[] getTopics() {
        return topics;
    }
}

IUserApi.java（API 界面）

public interface IUserApi {
    @GET("getTopics")
    Call<TopicResponse> getTop();
}

MainActivity.java

Retrofit retrofit = new Retrofit.Builder()
                .baseUrl("https://quizziyapa.herokuapp.com/")
                .addConverterFactory(GsonConverterFactory.create())
                .build();
        IUserApi api =  retrofit.create(IUserApi.class);
        Call<TopicResponse> call= api.getTop();
        call.enqueue(new Callback<TopicResponse>() {
            @Override
            public void onResponse(Call<TopicResponse> call, Response<TopicResponse> response) {
                Log.d("Ayush", "Response");
                Log.d("Ayush", String.valueOf(response));
                Log.d("Ayush", String.valueOf(response.message()));
                Log.d("Ayush", String.valueOf(response.errorBody()));
                Log.d("Ayush", String.valueOf(response.body()));
                Log.d("Ayush", String.valueOf(response.isSuccessful()));
                Log.d("Ayush", String.valueOf(response.raw().body()));
            }

            @Override
            public void onFailure(Call<TopicResponse> call, Throwable t) {
                Log.d("Ayush", "Failed \n"+t.getMessage());
            }
        });

帮我看看我该怎么做才能解决这个问题？

Answer 1

嗯，看来问题不在代码上。您收到的响应不是一条成功消息，而是一条 402 errorCode 消息，其中包含“需要付款”的消息。

根据您正在使用的 API 的 official docs，原因是

either the account has become delinquent as a result of non-payment, or the account’s payment method must be confirmed to continue

查看下图以供参考。

.

所以基本上是服务器向您返回错误代码。并且您的 response.isSuccessful 最终将是错误的，除非您收到成功消息作为响应，即图像中显示的状态之一。

Answer 2

我想我找到了解决办法。这个 API 在 browser 和 Postman 上也工作得很好。但是如果你注意到PostMan，状态是402

根据MDN Web Docs

The HTTP 402 Payment Required is a nonstandard client error status response code that is reserved for future use.

由于 retrofit 遵循状态代码 200 表示成功，因此您的响应正文为空。

但是，如果您仔细查看调试控制台，就会发现值 (json) 存在，但在 errorBody.

我不确定为什么 Heroku 发送 402 请求，但根据 ljk 的回答，您的帐户似乎没有完全激活。

您可以进一步读出Retrofit Class Response、

Returns true if code() is in the range [200..300).

Response.isSuccessfull() 为假

Response.isSuccessfull() is false

android

json

retrofit

retrofit2