Name: rlT66838 Date: 06/01/2000


java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)

On visiting a URL twice in a short space of time, even if disconnect
has been called, any request parameters for the second request are
ignored. The program below visits the same URL twice, using different
headers the second time. Using a network sniffer I have been able to
determine that the custom header (MyHeader) is *not* being set at all the
second time, although it's fine the first time.

This is not a problem in JDK1.2.2, and as it also happens with IBM's
JDK1.3 early release, I suspect it's a problem in rt.jar rather than
in the VM.




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

public class Test
{
    public static void main (String [] args)
        throws Exception
    {
        String url="http://www.yoda.arachsys.com/index.html";
        visitURL (new URL (url), "First");
        visitURL (new URL (url), "Second");
    }

    public static void visitURL (URL url, String param)
        throws IOException
    {
        HttpURLConnection uc=null;
        BufferedReader br=null;
        StringBuffer contentsBuffer = new StringBuffer();
        try
        {
            uc = (HttpURLConnection) url.openConnection();
            System.out.println ("Setting wibble");
            uc.setRequestProperty ("MyHeader", param);
            uc.setUseCaches(false);

            uc.connect();
            br = new BufferedReader
                (new InputStreamReader (uc.getInputStream()));
            String line;

            while ((line=br.readLine())!=null)
                ;
// System.out.println (line);
        }
        finally
        {
            if (br != null)
            {
                try
                {
                    br.close();
                }
                catch (IOException e)
                {
                }
            }
            if (uc != null)
                uc.disconnect();
        }
    }
}
(Review ID: 105583)
======================================================================