SendOTP : Java server side sample code for Custom Security Architecture.

SendOTP.java

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
import org.json.JSONObject;

import javax.ws.rs.core.MediaType;
import java.util.HashMap;


/*
* This code is based on jersey-client library.
* For gradle based project use compile 'com.sun.jersey:jersey-client:1.18.4'
* You can also download the jar and add it to you project.
* */
public class SendOTP {

  //Base URL
  public static String baseUrl = "http://sendotp.msg91.com/api";

  // Your application key
  public static String applicationKey = "Your application key here";

  /*
  * This function is used to send OTP message on mobile number
  * */
  public static void generateOTP(String countryCode, String mobileNumber){
    try {
      Client client = Client.create();
      String Url  = baseUrl+"/generateOTP";
      WebResource webResource = client.resource(Url);

      HashMap<String, String> requestBodyMap = new HashMap<>();
      requestBodyMap.put("countryCode",countryCode);
      requestBodyMap.put("mobileNumber",mobileNumber);
      JSONObject requestBodyJsonObject = new JSONObject(requestBodyMap);
      String input = requestBodyJsonObject.toString();

      ClientResponse response = webResource.type(MediaType.APPLICATION_JSON)
        .header("application-Key", applicationKey)
        .post(ClientResponse.class, input);

      String output = response.getEntity(String.class);
      System.out.println(output);


    } catch (Exception e) {
      e.printStackTrace();
    }

  }

  /*
  * This function is used to verify mobile number and will give refresh token in response.
  * */
  public static String verifyOTP(String countryCode, String mobileNumber, String oneTimePassword){
    try {

      Client client = Client.create();
      String Url  = baseUrl+"/verifyOTP";
      WebResource webResource = client.resource(Url);

      HashMap<String, String> requestBodyMap = new HashMap<>();
      requestBodyMap.put("countryCode",countryCode);
      requestBodyMap.put("mobileNumber",mobileNumber);
      requestBodyMap.put("oneTimePassword",oneTimePassword);
      JSONObject requestBodyJsonObject = new JSONObject(requestBodyMap);
      String input = requestBodyJsonObject.toString();

      ClientResponse response = webResource.type(MediaType.APPLICATION_JSON)
        .header("application-Key", applicationKey)
        .post(ClientResponse.class, input);


      String output = response.getEntity(String.class);
      System.out.println(output);
      JSONObject jsonObject = new JSONObject(output);
      return jsonObject.get("refreshToken").toString();


    } catch (Exception e) {
      e.printStackTrace();
    }
    return "";
  }
}