io.milton.dns.utils.Utils Maven / Gradle / Ivy

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/*
 * Copied from the DnsJava project
 *
 * Copyright (c) 1998-2011, Brian Wellington.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   * Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package io.milton.dns.utils;

import io.milton.dns.Name;
import io.milton.dns.TextParseException;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.net.UnknownHostException;


public class Utils {

	public static Name stringToName(String s) throws TextParseException {		
		if ( s == null ) {
			return null;
		}
		if ( !s.endsWith(".") ) {
			s += ".";
		}
		return Name.fromString(s);
	}
	
	public static String nameToString(Name n) {
		
		if ( n == null ) {
			return null;
		}
		String s = n.toString();
		if ( s.endsWith(".")){
			s = s.substring(0, s.length() - 1);
		}
		return s;
	}
	
	/**
	 * Just for fun...
	 * @return
	 */
	public static InetAddress probeIp(){
		
		String[] urls = {"http://automation.whatismyip.com/n09230945.asp",
				"http://api.externalip.net/ip/"};
		for (String s : urls) {
			
			try {
				URL url = new URL(s);
				URLConnection conn = url.openConnection();
				conn.setConnectTimeout(5000);
				conn.setReadTimeout(5000);
				conn.setRequestProperty("User-Agent", "Firefox/2.0");
				
				BufferedReader rdr = new BufferedReader(new InputStreamReader(
						conn.getInputStream(), "ASCII") );
				String addrS = rdr.readLine();
                return InetAddress.getByName(addrS);
				
			} catch(UnknownHostException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return null;
	
	}
}