Login via Rest web service from android using retrofit not working

Question

I am making an android app using Retrofit 2. My REST Api are all written in Liferay. Now in Liferay, what I have seen is, to access the web services we need to authenticate first. So i have authenticated like this

http://test:[email protected]:8080/liferay-portlet/api/secure/jsonws/

Liferay has its own user authentication method which we have overridden.I checked the Web service call from Postman its working fine.

URL:http://test:[email protected]:8080/liferay-portlet/api/secure/jsonws/customuserauthentication/authenticate-by-user-name

form-encoded values

companyId:10154
screenName:xyz
password:xyz
active:true

If i put this in the postman, it fetches the json response properly.

Now when i call the same from my android code i get a response "Unauthorized".

My Retrofit service

public interface LoginApi {    
    @FormUrlEncoded
    @POST("/liferay-portlet/api/secure/jsonws/customuserauthentication/authenticate-by-user-name")
    Call<User> login(@Field("companyId")long companyId,@Field("screenName")String screenName,@Field("password")String password,@Field("active")boolean active);
}

My RestApiManager Class(This class is used to call the service interface and create the retrofit builder)

public class RestApiManager {

    private LoginApi loginApi;

    public LoginApi login() {
        if (loginApi==null) {
            GsonBuilder gson=new GsonBuilder();
            gson.registerTypeAdapter(String.class, new StringDeserializer());
            Retrofit retrofit=new Retrofit.Builder()
                .baseUrl("http://test:[email protected]:8080")
                .addConverterFactory(GsonConverterFactory.create())
                .build();
            loginApi=retrofit.create(LoginApi.class);
    }
    return loginApi;
}

A call to the RestApiManager

Call<User> callUser=restApiManager.login().login(loginData.getCompanyId(),loginData.getScreenName(),loginData.getPassword(),loginData.isActive());
callUser.enqueue(new Callback<User>() {
    @Override
    public void onResponse(Response<User> response, Retrofit retrofit) {
        Log.d("Login","Login Response:"+response.body());
    }

    @Override
    public void onFailure(Throwable t) {
        Log.d("Login","Login Response:"+t.getMessage());
    }
});

Answer 1

It looks like perhaps your request should have a JSON body instead of a POST variables? You are calling a JSON webservice and your example parameters look more JSON than POST. If so, then you can encapsulate your parameters in an object --

public class User {
    int companyId;
    String screenName;
    String password;
    boolean active;

    User(int companyId, String screenName, String password, boolean active) {
        this.companyId = companyId;
        this.screenName = screenName;
        this.password = password;
        this.active = active;
}

Your interface would be --

public interface LoginApi {    
    @POST("/liferay-portlet/api/secure/jsonws/customuserauthentication/authenticate-by-user-name")
    Call<User> login(@Body User user);
}

and construct your call as --

User user = new User(loginData.getCompanyId(),loginData.getScreenName(),loginData.getPassword(),loginData.isActive());
Call<User> callUser = restApiManager.login().login(user);