java - 如何解析来自改造请求的以下错误响应？

Question

我正在尝试解析改造队列的错误主体。日志显示response.errorBody为

"{"response":["Image height must not exceed image width. Try a different image."]}"

这是我的代码:

call.enqueue(new Callback<EditBlogResponse>() {
            @Override
            public void onResponse(Call<EditBlogResponse> call, Response<EditBlogResponse> response) {
                if(response.body() != null){
                    Log.d(TAG, "onEditResponse: " + response.body());
                    editBlogResponse.setValue(response.body().toString());
                }else{
                    try {
                        Log.d(TAG, "onResponseError: " + response.errorBody().string());
                        JSONObject jsonObject = new JSONObject(response.errorBody().string());
                        JSONArray jsonArray = jsonObject.getJSONArray("response");
                        editBlogResponse.setValue(jsonArray.getString(0));
                    } catch (IOException e) {
                        e.printStackTrace();
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }

                }
            }

            @Override
            public void onFailure(Call<EditBlogResponse> call, Throwable t) {
                t.printStackTrace();
                editBlogResponse.setValue("failure");
            }
        });

我收到系统错误

W/System.err: org.json.JSONException: End of input at character 0 of 
    at org.json.JSONTokener.syntaxError(JSONTokener.java:460)
    at org.json.JSONTokener.nextValue(JSONTokener.java:101)
    at org.json.JSONObject.<init>(JSONObject.java:164)
    at org.json.JSONObject.<init>(JSONObject.java:181)
    at com.example.brandonblog.Repository.Repository$3.onResponse(Repository.java:176)
    at retrofit2.DefaultCallAdapterFactory$ExecutorCallbackCall$1$1.run(DefaultCallAdapterFactory.java:83)
    at android.os.Handler.handleCallback(Handler.java:883)
    at android.os.Handler.dispatchMessage(Handler.java:100)
    at android.os.Looper.loop(Looper.java:214)
    at android.app.ActivityThread.main(ActivityThread.java:7356)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)

关于我做错了什么有什么想法吗？

Answer 1

那么，在这种情况下，您的预期响应也在 onResponse() block 内。您必须在 block 中查找 400 或 4xx 状态代码，如下所示:

  if(response.code() != 200) { 
        Log.d(TAG, "onEditResponseCode: " + response.code());
        Log.d(TAG, "onEditResponse: " + response.body());
        editBlogResponse.setValue(response.body().toString());
  } else {
        Log.d(TAG, "onEditResponsecode: " + response.code());
      Log.d(TAG, "onEditResponse: " + response.body().response.get(0));
      //because your message is always at the 0th position of the 'response' list
      // You don't need to use any JSONObject or JSONArray etc for these.
  }

尝试让我知道它是否有效。