/**
   * Method to fill the JSON with the experiment information. This JSON includes the files field.
   *
   * @param json Input JSON to fill with data.
   * @param zipPath Path of the temporary zip files for the Experiment.
   * @return String with the new JSON.
   * @throws IOException
   */
  private String getJSONExperiment(String json, String zipPath) throws IOException {
    // Get bioID
    json += "\"id\":\"" + selExp.getBioID() + "\"";
    // Set zip file
    Path path = FileSystems.getDefault().getPath(zipPath);
    json += ",\"file\":\"" + new String(Base64Coder.encode(Files.readAllBytes(path))) + "\"}";

    return json;
  }
  /**
   * Method to open the connection to send the JSON to BiofOmics server.
   *
   * @return A HttpURLConnection with the server.
   * @throws IOException
   */
  private HttpURLConnection openConnection() throws IOException {
    // Get URL
    URL url;

    url = new URL(BewConstants.WEB);

    // Open the connection
    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
    // Set authorization header
    String auth = Base64Coder.encodeString(BewConstants.USER + ":" + BewConstants.PASS);
    connection.addRequestProperty("Authorization", "Basic " + auth);
    connection.setDoOutput(true);
    connection.setInstanceFollowRedirects(true);
    connection.setRequestMethod("POST");
    connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
    connection.setRequestProperty("charset", "UTF-8");
    connection.setUseCaches(false);

    return connection;
  }