This whois client defaults to the whois.internic.net server : Various Clients « Network Protocol « Java

1. Java
2. Network Protocol
3. Various Clients

This whois client defaults to the whois.internic.net server

/*
Chapter 3 - Simple Protocols
Java 2 Network Protocols Black Book
by Al Williams    
Paraglyph Press 2001

*/
import java.net.*;
import java.io.*;

public class Whois {
    public void whois(String query) throws IOException {
    whois(query,"whois.internic.net");
    }

    public String whois(String query, String server) throws IOException {
       Socket sock = new Socket(server,43);
       int c=0;
       String outstring="";
       OutputStream os = sock.getOutputStream();
       InputStream is = sock.getInputStream();
       query += "\r\n";
       os.write(query.getBytes("iso8859_1"));
       try {
           while (c!=-1) {
             c=is.read();
             if (c!=-1) outstring+=(char)c;
           }
       }
       catch (IOException e) {}
       return outstring;
    }
    public static void main(String[] args) {
       String hostname = "";
       String ulist = "";
       if (args.length==0) {
           System.out.println("usage: whois [%host] query");
           System.exit(1);
       }
       int argn=0;
       hostname="whois.networksolutions.com"; // default
       if (args.length>1 && args[0].charAt(0)=='%') {
           hostname=args[argn].substring(1);
            argn++;
       }
        for (int i=argn; i<args.length; i++) 
             ulist+=args[i]+" ";
       Whois worker = new Whois();
       try {
           System.out.println(worker.whois(ulist.trim(),hostname));
       }
       catch (Exception e) {
           System.out.println(e);
       }
    }
}

           
       

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