private HttpURLConnection set_headers(String url)
			throws MalformedURLException {
		URL obj = new URL(url);
		HttpURLConnection con = null;
		try {
			con = (HttpURLConnection) obj.openConnection();
			con.setRequestProperty("Content-Type", "application/json");
			con.setRequestProperty("Accept", "application/json");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return con;
	}