[android-developers] Android connecting web service (node.js) authentication and then capturing the token

[shidoshidf]

Dear Friends...


I managed to make an implementation with Retrofit using basic 
authentication, ie, sending the username and password, and can authenticate 
to the webservice.
However, I can not capture the token that is returned in json.

I follow this tutorial
https://futurestud.io/tutorials/android-basic-authentication-with-retrofit


Below is the code that implemented.

ServiceGenerator.java

public class ServiceGenerator {

    public static final String API_BASE_URL = "https://NOME_APP.herokuapp.com/ 
<https://nome_app.herokuapp.com/>";

    private static OkHttpClient.Builder httpClient = new OkHttpClient.Builder();

    private static Retrofit.Builder builder =
            new Retrofit.Builder()
            .baseUrl(API_BASE_URL)
            .addConverterFactory(GsonConverterFactory.create());

    public static <S> S createService(Class<S> serviceClass){
        return createService(serviceClass, null, null   );
    }


    public static <S> S createService(Class<S> serviceClass, String name, 
String password){
        if(name != null && password != null){
            String credentials = name + ":" + password;

            final String basic = "Basic " + 
Base64.encodeToString(credentials.getBytes(), Base64.NO_WRAP);

            httpClient.addInterceptor(new Interceptor() {
                @Override
                public Response intercept(Chain chain) throws IOException {
                    Request original = chain.request();

                    Request.Builder requestBuilder = original.newBuilder()
                            .header("Authorization", basic)
                            .header("Accept", "application/json")
                            .method(original.method(), original.body());

                    Request request = requestBuilder.build();
                    return chain.proceed(request);
                }
            });
        }

        OkHttpClient client = httpClient.build();
        Retrofit retrofit = builder.client(client).build();
        return retrofit.create(serviceClass);
    }
}



LoginService.java

public interface LoginService {

    @POST("api/autenticar")
    Call<Login> basicLogin();
}



Login.java

public class Login {
    @SerializedName("name")
    private String name;

    @SerializedName("password")
    private String password;

    @SerializedName("token")
    private String token;

    public Login(String name, String password){
        this.name = name;
        this.password = password;
    }


    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getToken() {
        return token;
    }

    public void setToken(String token) {
        this.token = token;
    }
}




MainActivity.java

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    try {
        logarWebService();
    } catch (IOException e) {
        e.printStackTrace();
    }

.
.
.

private void logarWebService() throws IOException {

    LoginService loginService  = 
ServiceGenerator.createService(LoginService.class, "appLoginWS", "appSenhaWS");
    Call<Login> call = loginService.basicLogin();

    call.enqueue(new Callback<Login>() {
        @Override
        public void onResponse(Call<Login> call, Response<Login> response) {
            if(response.isSuccessful()){
                Log.d(TAG, "responseOK");
            }else{
                Log.d(TAG, "responseNULL");
            }
        }

        @Override
        public void onFailure(Call<Login> call, Throwable t) {

        }
    });

    Login login = call.execute().body();

}



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