POST with HttpUrlConnection

A shot note on POST requests:

public InputStream post(String url, String params) throws IOException {
    URL u = new URL(url);
    HttpURLConnection con = (HttpURLConnection) u.openConnection();
    con.setRequestMethod("POST");
    con.setDoOutput(true);
    try (OutputStreamWriter out = new OutputStreamWriter(con.getOutputStream())) {
        out.write(params);
    }

    return con.getInputStream();
}

GET request much simpler:

    String getAmazonHostName() throws  IOException {
        URL url = new URL("http://169.254.169.254/latest/meta-data/public-hostname");
        try (BufferedReader in = new BufferedReader( new InputStreamReader(url.openStream()))) {
            String inputLine = in.readLine();
            System.out.println("amazon public hostname: " + inputLine);
            return inputLine;
        }
    }