// https://raw.githubusercontent.com/square/okhttp/master/samples/guide/src/main/java/okhttp3/guide/GetExample.java
import java.io.IOException;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

import okio.AsyncTimeout;
import okio.Timeout;

import java.util.concurrent.TimeUnit;

public static String OkHTTP_Download(String url) {//throws IOException {

//OkHttpClient client = new OkHttpClient();
OkHttpClient client = new OkHttpClient.Builder()
.callTimeout(30,TimeUnit.SECONDS) // default timeout for complete calls
        .readTimeout(30,TimeUnit.SECONDS) // default read timeout for new connections
        .writeTimeout(30,TimeUnit.SECONDS) // default write timeout for new connections
        .followRedirects(true) // follow requests redirects
        .followSslRedirects(true) // follow HTTP tp HTTPS redirects
        .retryOnConnectionFailure(true) // retry or not when a connectivity problem is encountered
    .build();

    Request request = new Request.Builder()
        .url(url)
        .build();

    try (Response response = client.newCall(request).execute()) {
      return response.body().string();
    }
catch(Exception e)
    {
return "";    
    }
  }