Volley Post with JSON - 获取 422 状态码

Question

我正在尝试使用 Volley to send a JSON object to a Loopback application API which is using MongoDB. I can see that the data is being saved in the database successfully. But the Volley response always shows that the status code is 422。有人可以指出我做错了什么吗？

这是错误信息：

BasicNetwork.performRequest: Unexpected response code 422 for http://localhost:3001/api/Persons

这是我要发送的JSON：

{
  "map_coordinates": {
    "lat": xxxxxx,
    "lng": xxxxxxx
  },
  "first_name": "xxxxx",
  "middle_name": "",
  "family_name": "xxxxxx",
  "gender": "xxxxxx",
  "role": "xxxxxx",
  "dob": "2017-09-28T05:51:40.836Z",
  "picture_of_person": "",
  "username": "ajxxxx7@gmail.com",
  "deviceToken": "xxxxxxxx",
  "portal_address": "xxxxx",
  "email": "ajxxxxx7@gmail.com",
  "password": "xxxxxxx",
  "vcode": 562991,
  "mobile": "+91xxxxxxxx"
}

我认为 JSON 没有问题，因为如果我 POST 来自 Loopback 资源管理器的相同对象，则请求成功通过并且 returns 状态代码 200.

这是我用来发送 JSON 请求的代码。

public void postJsonRequest(String url, JSONObject data, final Callback<JSONObject, VolleyError> callback) {
    JsonObjectRequest objectRequest = new JsonObjectRequest(Request.Method.POST,
            url, data, new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {
            callback.onSuccess(response);
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            callback.onFailure(error);
        }
    });
    makeJsonRequest(objectRequest);
}

private void makeJsonRequest(JsonObjectRequest request) {
    RequestQueue queue = Volley.newRequestQueue(EngageMyTime.getInstance().getEMTContext());
    queue.add(request);
}

任何 help/idea 将不胜感激。

Answer 1

你回复的是什么格式？如果您不能使用 JSON，您可能会看到此错误。因为 postJSONResponse 在解析时使用了 JSONObject。像这样的东西。您可以编写自定义请求或将响应类型更改为 JSON。自定义请求示例为：

public class SignUpRequest extends Request<String> {
    private Map<String, String> mParams;
    public SignUpRequest(String url, Response.ErrorListener listener) {
        super(url, listener);
    }

    public SignUpRequest(int method, String url,String email,String userName,String password, Response.ErrorListener listener) {
        super(method, url, listener);
        mParams=new HashMap<>();
        mParams.put("username",userName);
        mParams.put("email",email);
        mParams.put("password",password);
    }




    @Override
    protected void deliverResponse(String response) {
        Log.e("Response",response);
    }

    @Override
    protected Map<String, String> getParams() throws AuthFailureError {

        return mParams;
    }

    @Override
    protected Response<String> parseNetworkResponse(NetworkResponse response) {
        String data=new String(response.data);
        return Response.success(data+" "+response.statusCode,
                HttpHeaderParser.parseCacheHeaders(response));
    }
}

Answer 2

尝试在服务器端设置默认字符集 UTF-8，并在发送前用 UTF-8 编码 json 数据

在android和

URLEncoder.encode(string,"UTF-8");

Volley Post with JSON - 获取 422 状态码

Volley Post with JSON - getting 422 Status Code

java

android

json

android-volley

loopbackjs