Cookie handling

[sqoti]

Is there a way to parse out values from a cookie using java(not javascript). For example cookie = Name = "CookieName" and Value = "Herb,/docs/sample/file/". I want to use java to take cookie and value and split it by delimiting the comma. Hence I would have two value to work with
Herb and /docs/sample/file. I have been looking and can't find an example of this is java.

Thanks in advance!!!

 

[palbano]

you can use the StringTokenizer class to parse the tokens or even use the 1.4 additional java.lang.String classes split(..) methods which take regular expressions and return arrays.

-pete

 

[greeneka]

Are you writing a desktop application to check cookies coming from a site or a servlet(or JSP page) to check cookies coming from a web browser?

If you're writing a desktop app heres a chunk of code I've used before:

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

public class CookieSplitter {

	private static final String cookieName = "Name of cookie to find";

	public static void proxy(){
		// if you need to set up a proxy for your connection
		Properties systemProperties = System.getProperties();
		systemProperties.setProperty("http.proxyHost","your proxy");
		systemProperties.setProperty("http.proxyPort","port to connect to on the proxy");
	}

	public static void main(String[] args){
		try{
			// if you use a proxy
			proxy();

			String[] cookies = null;

			// just grabbing the url from the args for this example
			URL url = new URL(args[0]);
			HttpURLConnection connection = (HttpURLConnection)url.openConnection();
			connection.connect();
			InputStream in = connection.getInputStream();
			Iterator iterator = connection.getHeaderFields().entrySet().iterator();
			if(iterator != null){
				while(iterator.hasNext()){
					String headerString = iterator.next().toString();
					int beginIndex;
					if((beginIndex = headerString.indexOf(cookieName)) != -1){
						// usually cookies take the form name=value;
						// so to get the value for this cookie move the beginIndex along
						// cookieName.length()+1 spaces
						String s = headerString.substring(beginIndex+cookieName.length()+1);
						// and split this new string on the first ';' in case there
						// is more than one cookie in the header
						s = s.split(";")[0];
						// now s will be the "Herb,/docs/sample/file/" given in your example
						// so to split that it's a simple
						cookies = s.split(",");
						break;
					}
				}
			}

			if(cookies != null && cookies.length == 2){
				// use the 2 cookies you were looking for!
			}

			in.close();
			connection.disconnect();
		}catch(MalformedURLException mfuex){
			mfuex.printStackTrace();
		}catch(IOException ioex){
			ioex.printStackTrace();
		}
	}
}

Messy, I know, but it works!!

If you're writing serverside try just do a:

Cookie[] cookies = request.getCookies();

and parse these (not gonna write the full serlvet/jsp 4 u ;-))

hope this helps.

P.S. The 'h's in HttpURLConnection should be uppercase, won't go through properly for some reason!