[ale] OT: Java and Cookies

[Christopher Fowler]

On Fri, Aug 29, 2003 at 01:18:21PM -0500, Denny Chambers wrote:
> Hey, It just so happens I am working on HttpURLConnection stuff right 
> now. It sounds like the page that returns the frame sets does not return 
> a Set-Cookie, but frame source URLs do return cookies. Is this correct?


Actually it does do a set cookie.  Look at my hack code:

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

public class Soc {

    public static void main (String args[]) {
        String cookie = null;
        String message = new String (
                    "POST /auth.asp HTTP/1.1\r\n" +
                    "Content-Length: 45\r\n" +
                    "Content-Type: application/x-www-form-urlencoded\r\n" +
                    "User-Agent: Java/1.4.1_02\r\n" +
                    "Host: 127.0.0.1\r\n" +
                    "Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2\r\n" +
                    "Connection: keep-alive\r\n" +
                    "\r\n" +
                    "login=super&password=smart&action_login=Login");
        try {
            Socket soc = new Socket("127.0.0.1", 80);
            OutputStream os = soc.getOutputStream();
            BufferedReader br = new BufferedReader(
                                    new InputStreamReader(soc.getInputStream()));
            os.write(message.getBytes());
            String s;
            while((s = br.readLine()) != null) {
                if(s.startsWith("Set-Cookie:") == true) {
                    cookie = s.substring(12, s.indexOf(';'));
                }
            }
            soc.close();
        } catch (Exception exp) {
            System.err.println("Error: " + exp.getMessage());
            System.exit(1);
        }

        if(cookie == null) {
            System.err.println("Authentication failure!\n");
            System.exit(1);
        }

        try {
            String s;
            URL url = new URL("http://127.0.0.1/title_app.asp");
            HttpURLConnection connection = (HttpURLConnection)url.openConnection();
            connection.setRequestProperty("Cookie", cookie);
            connection.setRequestProperty("Referrer", "http://127.0.0.1/auth.asp");
            BufferedReader br = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            while((s = br.readLine()) != null) {
                System.out.println(s);
            }
        } catch (Exception exp) {
            System.err.println("Error: " + exp.getMessage());
            System.exit(1);
        }

    }
}

/* vi: set ts=4 sw=4 :*/


This is crappy hack code.  I'd prefer to do it wit classes.  
> 
> I am not sure how the HttpURLConnection works with frames. Does it try 
> to download each frame URL automatically? If so what you need are those 
> URLConnections. From looking at your code what your looking for is a 
> Set-Cookie header from the response that is returning the FrameSet HTML 
> code, if that code does not send a cookie, you will not get one looking 
> at that response data. If the HttpURLConnection is automatically making 
> the request for all of the frame src, then that is telling me that the 
> HttpURLConnection has a ContentHandler class that is parsing the html 
> data, and making the necessary request. If that is true, then your 
> answer may be in the ContentHandler class.

Could be.  The response is a redirect response.  The redirected page
is the page with all the framesets.

> 
> HTH,
> Denny
> 
> 
> 
> >I'm trying to do a POST and grab a cookie to be used for later 
> >authentication. I hope that maybe you guys have done this
> >before.  The aut.asp page is a simple POST form.  When the
> >form is submitted it returns a frameset and a cookie.  I can
> >not seem to get the the HttpURLConnection to get the cookie.  It
> >seems that the conneciton does the post and then tries to
> >receive each page of the framset.  However, I do not see
> >and Cookies: being sent with those GET requests.  Is there a
> >way to get this code to use the Set-Cookie that is being sent
> >back.   
> >
> >---------- Cut Here --------------------------------
> >
> >   public static void main(String args[]) {
> >       InputStream is;
> >       int data;
> >       String s;
> >       DataOutputStream    printout;
> >       String c;
> >       try {
> >           URL url = new URL("http://127.0.0.1/auth.asp");
> >           HttpURLConnection connection = 
> >           (HttpURLConnection)u.openConnection();
> >           String emit = "login=super&password=smart&action_login=Login";
> >           connection.setRequestProperty("Content-Length", "" + 
> >           emit.length());
> >           connection.setRequestProperty("Content-Type", 
> >           "application/x-www-form-urlencoded");
> >           connection.setUseCaches (false);
> >           connection.setDoInput(true);
> >           connection.setDoOutput(true);
> >           connection.setFollowRedirects(false);
> >           /* Not used now
> >           connection.setRequestProperty(
> >               "Authorization", 
> >               "Basic " + "cm9vdDpwYXNzd29yZA=="
> >           );      
> >           */
> >           connection.setDoOutput(true);
> >           connection.setDoInput(true);
> >           printout = new DataOutputStream (connection.getOutputStream ());
> >           printout.writeBytes (emit);
> >           printout.flush ();
> >           printout.close ();
> >           c = connection.getHeaderField("Set-Cookie");
> >           System.out.println("Cookie: " + c);
> >           BufferedReader br = new BufferedReader(new 
> >           InputStreamReader(connection.getInputStream()));
> >           System.out.flush();
> >           while((s = br.readLine()) != null) {
> >               System.out.println(s);
> >           }
> >       } catch (Exception Exp) {
> >           System.err.println("Error: " + Exp.getMessage());
> >           System.exit(1);
> >       }
> >   }
> >
> >
> >---------- Cut Here --------------------------------
> >_______________________________________________
> >Ale mailing list
> >Ale at ale.org
> >http://www.ale.org/mailman/listinfo/ale
> >
> >
> > 
> >


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