Connector.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;

public class Connector {

    private String serviceAccountKey = "xxx";
    private String serviceAccountSecret = "xxx";

    public String get(String urlString) throws IOException {
        URL url = new URL(urlString);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        String userpass = serviceAccountKey + ":" + serviceAccountSecret;
        String basicAuth = "Basic " + javax.xml.bind.DatatypeConverter.printBase64Binary(userpass.getBytes());
        conn.setRequestProperty("Authorization", basicAuth);
        conn.setRequestMethod("GET");
        conn.setRequestProperty("Accept", "application/json");

        int responseCode = conn.getResponseCode();
        if (responseCode != HttpURLConnection.HTTP_OK) {
            throw new RuntimeException("Failed : HTTP error code : " + responseCode);
        }
        BufferedReader br = new BufferedReader(new InputStreamReader((conn.getInputStream())));
        String response = br.readLine();
        conn.disconnect();
        return response;
    }

    public String post(String urlString, String data) throws IOException {
        URL url = new URL(urlString);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        String userpass = serviceAccountKey + ":" + serviceAccountSecret;
        String basicAuth = "Basic " + javax.xml.bind.DatatypeConverter.printBase64Binary(userpass.getBytes());
        conn.setRequestProperty("Authorization", basicAuth);
        conn.setDoOutput(true);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Accept", "application/json");
        OutputStream os = conn.getOutputStream();
        os.write(data.getBytes());
        os.flush();

        int responseCode = conn.getResponseCode();
        if (responseCode != HttpURLConnection.HTTP_OK) {
            throw new RuntimeException("Failed : HTTP error code : " + responseCode);
        }
        BufferedReader br = new BufferedReader(new InputStreamReader((conn.getInputStream())));
        String response = br.readLine();
        conn.disconnect();
        return response;
    }

}