Retrofit 2.0:获取响应代码 200 但未获取所需数据 [英] Retrofit 2.0: getting response code 200 but not getting the desired data

问题描述

Retrofit 2.0 的一个非常令人失望的特性是它没有准确地指出解析响应失败的地方.因此，在邮递员中，当我用相同的正文点击请求时，我得到的登录响应为:

<代码> {"result": "成功",响应代码":200，数据": {"id": "1","display_name": "管理员","email": "[e-mail]",用户名":管理员"，"access_token": "8daa8e02ca432e51ae90912fbf63eeea"}}

但是当我在 Retrofit 中使用完全相同的 body 发出完全相同的请求时，我得到了一个非常奇怪的响应:{protocol=http/1.1, code=200, message=OK, url=

我的日志记录(ok hhttp)，当点击带有正确详细信息的登录按钮时:

解决方案:

基本上问题是我使用 Log.d(TAG, "onResponse: success"+response.code()+" "+response); 来检查 onresponse 回调中的响应.而我应该做的就是不要卡在那里并检查 loginResponse 对象的值(来自 LoginResponse loginResponse = response.body();).因为 response.body 实际上是以对象形式存储响应的.这就是改造中的工作方式.

解决方案

根据您的日志，API 调用正确.它也会响应.但问题是后端的 API 身份验证失败.添加登录您的网络服务并检查.从应用程序方面来看，它运行良好.这不是 Retrofit 的问题.

使用以下更新您的 onResponse() 并运行应用程序.然后测试并让我知道您收到什么消息.

if(response.body()!=null){LoginResponse loginResponse = response.body();字符串内容="";如果 (response.body().getResponseCode()==200){content+= loginResponse.getData().getAccessToken();content+= loginResponse.getData().getDisplayName();content+= loginResponse.getData().getEmail();content+= loginResponse.getData().getId();content+= loginResponse.getData().getUsername();}别的{content+=loginResponse.getData().getMsg();}Log.d(TAG, "onResponse: login res"+content);} 别的 {Toast.makeText(LoginActivity.this, "来自服务器的无效响应", Toast.LENGTH_SHORT).show();}

Data.java 中的以下代码

 @SerializedName("msg")@暴露私人字符串味精；公共字符串 getMsg() {回消息；}公共无效setMsg(字符串味精){this.msg = msg;}

A very disappointing feature of Retrofit 2.0 is that it does not exactly tell where it fails in parsing the response. Hence, In postman when I hit the request with same body, I get a login response as:

 {
    "result": "success",
    "response_code": 200,
    "data": {
        "id": "1",
        "display_name": "admin",
        "email": "[e-mail]",
        "username": "admin",
        "access_token": "8daa8e02ca432e51ae90912fbf63eeea"
    }
}

But when I hit the exact same request with exactly the same body in Retrofit, I get a very peculiar response as: {protocol=http/1.1, code=200, message=OK, url=http://192.168.0.52/evidya/wp-api/v1/user/login}. Now I have gone through other related questions with above mentioned problem but none of them is working for me. Please Help. My code:

Retrofit API interface:

public interface eVidyaApi {

    @FormUrlEncoded
    @POST("user/login")
    Call<LoginResponse> loginUser(
            @HeaderMap Map<String, String> headers,
            @Field("email") String email,
            @Field("password") String password
    );
}

Login Function:

    public void login() {
        Log.d(TAG, "Login");
        if (!validate()) {
            onLoginFailed();
            return;
        }

        final ProgressDialog progressDialog = new ProgressDialog(LoginActivity.this, R.style.MyDialogTheme);
        progressDialog.setIndeterminate(true);
        progressDialog.setMessage("Authenticating...");
        progressDialog.show();

        String email = _emailText.getText().toString();
        String password = _passwordText.getText().toString();

        Log.d(TAG, "login: "+email+"  "+password);
        // TODO: Implement your own authentication logic here.
        Call<LoginResponse> loginResponseCall = evidya.loginUser(Common.getHeaders(), email, password);

        loginResponseCall.enqueue(new Callback<LoginResponse>() {
            @Override
            public void onResponse(Call<LoginResponse> call, Response<LoginResponse> response) {
                progressDialog.dismiss();
                if(!response.isSuccessful()){
                    Toast.makeText(LoginActivity.this, ""+response.message(), Toast.LENGTH_SHORT).show();
                    Log.d(TAG, "onResponse: fail "+response.code());
                    return;
                }

                Log.d(TAG, "onResponse: success"+response.code()+"  "+response);

                if(response.body()!=null){
                    String content="";
//                    _loginButton.setEnabled(false);
                    LoginResponse loginResponse = response.body();
                    content += "code:"+ response.code();
                    content += "token:"+ loginResponse.getData().getAccessToken();
                    content += "result"+ loginResponse.getResult();
                    content += "result"+ loginResponse.getData().getDisplayName();
//                    onLoginSuccess();
                    Log.d(TAG, "onResponse: login res"+content);
                } else {
                    Toast.makeText(LoginActivity.this, "Invalid response from server", Toast.LENGTH_SHORT).show();
                }

            }

            @Override
            public void onFailure(Call<LoginResponse> call, Throwable t) {
                progressDialog.dismiss();
                Toast.makeText(LoginActivity.this, "Cannot fetch request", Toast.LENGTH_SHORT).show();

            }
        });
    }

LoginResponse.java

package com.example.evidya.Retrofit.Model.LoginModel;

import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

public class LoginResponse {

    @SerializedName("result")
    @Expose
    private String result;
    @SerializedName("response_code")
    @Expose
    private Integer responseCode;
    @SerializedName("data")
    @Expose
    private Data data;

    public String getResult() {
        return result;
    }

    public void setResult(String result) {
        this.result = result;
    }

    public Integer getResponseCode() {
        return responseCode;
    }

    public void setResponseCode(Integer responseCode) {
        this.responseCode = responseCode;
    }

    public Data getData() {
        return data;
    }

    public void setData(Data data) {
        this.data = data;
    }

}

Data.java

package com.example.evidya.Retrofit.Model.LoginModel;

import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

public class Data {

    @SerializedName("id")
    @Expose
    private String id;
    @SerializedName("display_name")
    @Expose
    private String displayName;
    @SerializedName("email")
    @Expose
    private String email;
    @SerializedName("username")
    @Expose
    private String username;
    @SerializedName("access_token")
    @Expose
    private String accessToken;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getDisplayName() {
        return displayName;
    }

    public void setDisplayName(String displayName) {
        this.displayName = displayName;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getAccessToken() {
        return accessToken;
    }

    public void setAccessToken(String accessToken) {
        this.accessToken = accessToken;
    }

}

My Logging(ok hhttp), when clicking the login button with wrong details:

My Logging(ok hhttp), when clicking the login button with CORRECT details:

Solution:

Basically the problem was that I was using Log.d(TAG, "onResponse: success"+response.code()+" "+response); to check the response in the onresponse callback. Whereas all I should have done is to not get stuck there and check the value of the loginResponse object (from LoginResponse loginResponse = response.body();). Because response.body actually stores the reponse in object form. This is how things work in retrofit.

解决方案

As per your log, API calls properly. It also responds. but the issue is API authentication is failed from your back end. Add log on your web service and check. From the application side, it is working fine. this is not an issue of Retrofit.

Update your onResponse() with below and run application. then test and let me know what message you get.

if(response.body()!=null){
                LoginResponse loginResponse = response.body();
                String content="";
                if (response.body().getResponseCode()==200){
                    content+= loginResponse.getData().getAccessToken();
                    content+= loginResponse.getData().getDisplayName();
                    content+= loginResponse.getData().getEmail();
                    content+= loginResponse.getData().getId();
                    content+= loginResponse.getData().getUsername();
                }else{
                    content+=loginResponse.getData().getMsg();
                }

                Log.d(TAG, "onResponse: login res"+content);
            } else {
                Toast.makeText(LoginActivity.this, "Invalid response from server", Toast.LENGTH_SHORT).show();
            }

Below code in Data.java

 @SerializedName("msg")
        @Expose
        private String msg;
        public String getMsg() {
            return msg;
        }

        public void setMsg(String msg) {
            this.msg = msg;
        }

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