/*
 * @version $Revision: 1.2 $
 * @author Gary Ellison
 * @author Matt Curtin
 * @lyricist Doug Monroe
 *
 * you put your OPT-OUT in
 * you put your OPT-IN out
 * you put your OPT-OUT in
 * and you shake it all abOUT
 *
 * you do the CookiePokey
 * and your privacy is gone
 * that's what it's all about!
 * <clap>
 */

import java.io.*;
import java.net.*;
import java.util.*;

public class CookiePokey {

    // a doubleclick cookie pusher which issues the redirect w/cookie
    static String defaultTarget =
	"http://ad.doubleclick.net/ad/www.doubleclick.net/optout;sz=1x1";

    // where do you want to come from today
    static String defaultReferer = "http://www.doubleclick.net/";
    
    // various user-agent strings
    static String ns6UserAgent =
	"Mozilla/5.0 (Windows; N; Win98; en-US; m14) Netscape6/6.0b1";
    static String ns4UserAgent = "Mozilla/4.72 [en] (X11; U; SunOS 5.7 sun4u)";
    static String operaUserAgent = "Opera/4.0 (Windows 98;US) Beta 3  [en]";
    static String ieUserAgent =
	"Mozilla/4.0 (compatible; MSIE 5.01; Windows 98; c_athome)";

    // that would be yes and no
    static String cookiePokeyAgent = 
	"CookiePokey/4906 (Java; Interhack Corporation; Don't tread on me)";

    static String oCookie = "id=OPT_OUT";      // lma
    static String pCookie = "id=A";            // prime-d-pump

    String referer;
    String cookieFieldKey;
    String userAgent;
    String target;
    String cookie;

    public CookiePokey(String url, String hdr, String cookie) {
	this.target = url;
	this.cookie = cookie;
	this.cookieFieldKey = hdr;
	//
	referer = defaultReferer;
	userAgent = cookiePokeyAgent;
    }

    public void setCookieFieldKey(String k) {
	cookieFieldKey = k;
    }
    
    public void setUA(String ua) {
	String userAgent = ua;
    }
    
    public void setReferer(String r) {
	String referer = r;
    }

    public String getCookie() {
	return cookie;
    }
    
    public void doThe() {

	try {
	  
	    URL url = new URL(target);
	    URLConnection uc = url.openConnection();
	    HttpURLConnection http = null;
	    if (uc instanceof HttpURLConnection)
		http = (HttpURLConnection) uc;
	    else
		return;

	    http.setRequestProperty("User-Agent", userAgent);
	    http.setRequestProperty("Referer", referer);
	    if (cookie != null && cookie.length() > 0)
		http.setRequestProperty(cookieFieldKey, cookie);

	    // showem what j00 got
	    System.out.println("\n_______");
	    System.out.println("Sending:");
	    System.out.println("  HTTP: GET " + target);
	    System.out.println("  HTTP: User-Agent" + ": " + userAgent);
	    System.out.println("  HTTP: Referer" + ": " + referer);
	    if (cookie != null && cookie.length() > 0)
		System.out.println("  HTTP: " + cookieFieldKey + ": " + 
				   cookie);
	    System.out.println("");
		
	    // and now for something completely different
	    http.getInputStream();
	    System.out.println("Receiving:");
	    System.out.println("  HTTP: " + http.getHeaderField(0));
	    String key = null;
	    for (int i=1; i < 10; i++) {
		if (http.getHeaderFieldKey(i) == null)
		    break;
		key = http.getHeaderFieldKey(i);
		if (key.toLowerCase().startsWith("set-cookie")) {
		    parseCookie(http.getHeaderField(i));
		}
		System.out.println("  HTTP: " + key +
				   ": " + http.getHeaderField(i));
	    }
	    
	} catch (Exception e) {
	    System.out.println("Ufda! " + e);
	    e.printStackTrace();
	}

    }

    void parseCookie(String c) {

	StringTokenizer st = new StringTokenizer(c, ";");

	String token = null;

	while (st.hasMoreTokens()) {
	  token = st.nextToken().trim();
	  if (token.startsWith("id=")) {
	      cookie = token;
	      break;
	  }
	  
	}
    }


    public static void main(String args[]) {

	String target = null;
	if (args.length < 1) {
	    // you may also have to define proxy properties via
	    // -Dhttp.proxyHost=<hostname> -Dhttp.proxyPort=<port>
	    //
	    System.out.println("usage warning: java CookiePokey " +
			       defaultTarget);
	    System.out.println("\tUsing default target " + defaultTarget);
	    target = defaultTarget;
	} else {
	    target = args[0];
	}
      
	// redirects considered harmful 
	HttpURLConnection.setFollowRedirects(false);

	// test priming
	CookiePokey cookiePokey = new CookiePokey(target, "Cookie", 
						  pCookie);
	cookiePokey.doThe();
	    
	// legal header keys
	Vector cookieHeaders = new Vector();
	cookieHeaders.addElement("Cookie");
	cookieHeaders.addElement("COOKIE");
	cookieHeaders.addElement("cookie");
	cookieHeaders.addElement("CoOkIe");
	
	// now lets look for conformance
	Enumeration cooked = cookieHeaders.elements();
	while (cooked.hasMoreElements()) {
	    cookiePokey = new CookiePokey(target,
					  (String)cooked.nextElement(),
					  oCookie);
	    cookiePokey.doThe();
	}

    }
    
	
}