MyTurl.java


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/* 
 * myturl.com URL Shortener (Java Client)
 * by Mike Crute (mcrute@gmail.com)
 * on December 1, 2009
 *
 * compile with: javac MyTurl.java
 * run with: java MyTurl
 */

import java.net.URL;
import java.net.HttpURLConnection;
import java.net.URLEncoder;


public class MyTurl
{
    public static void blow_up(String message)
    {
        System.err.println(message);
        System.exit(1);
    }


    public static void main(String[] args)
        throws Exception
    {
        if (args.length < 1) {
            blow_up("This program takes one argument, the URL.");
        }

        String target = URLEncoder.encode(args[0], "US-ASCII");
        URL myTurl = new URL("http://myturl.com/add-url?url=" + target);
        HttpURLConnection conn = (HttpURLConnection)myTurl.openConnection();

        if (conn.getResponseCode() != HttpURLConnection.HTTP_OK) {
            blow_up("Couldn't contact the service!");
        }

        String turl = conn.getHeaderField("X-MyTurl");
        if (turl == null) {
            blow_up("No turl was generated. Check your URL.");
        }

        System.out.println(turl);
    }
}