Name: yyC67448 Date: 02/19/98



The java.net.URLConnection.setDefaultRequestProperty(String key, String value) does
not set any default property at all.

Here is the javadoc comments for methods setDefaultRequestProperty and
getDefaultRequestProperty

    /**
     * Sets the default value of a general request property. When a
     * <code>URLConnection</code> is created, it is initialized with
     * these properties.
     *
     * @param key the keyword by which the request is known
     * (e.g., "<code>accept</code>").
     * @param value the value associated with the key.
     * @since JDK1.0
     */



    /**
     * Returns the value of the default request property. Default request
     * properties are set for every connection.
     *
     * @return the value of the default request property for the specified key.
     * @see java.net.URLConnection#setDefaultRequestProperty(java.lang.String,
      java.lang.String)
     * @since JDK1.0
     */



Here is the test demonstrating the bug:

------------------------ Test.java ---------------------------------------
import java.net.*;

class test
{
  public static void main(String args[])
  {
    URL url = null;
    URLConnection conn = null;
    String key = "accept-charset";
    String value = "iso-8859-5";
   
   
   /*
    * Setting some DefaultRequestProperty value
    */
    URLConnection.setDefaultRequestProperty(key, value);

   
   /*
    * Verify, that the property is really set to specified value
    */
   if( !value.equals(URLConnection.getDefaultRequestProperty(key) ) )
   {
    System.out.println("Failed. Default Property is not set.");
   }
   
   /*
    * Now verify the subsequent URLConnection object properties
    */
    try {
     url = new URL("http://web2.javasoft.com/index.html");
     conn = url.openConnection();
    } catch(Exception e)
    {
System.out.println("Failed. Unexpected exception :" + e);
System.exit(-1);
    }
    
    if( !value.equals(conn.getRequestProperty(key) ) )
    {
     System.out.println("Failed. Request property is not set.");
    }
     
    /*
     * Now verify these methods in
     */
     conn.setDefaultRequestProperty(key, value);
     
     if( !value.equals(conn.getDefaultRequestProperty(key) ) )
     {
      System.out.println("Failed. Default request property is not" + " set from heir class");
      System.exit(-1);
     }
     
     
        
    System.out.println("Passed. OKAY");


  }
   
}

------------------------- Output from the test ----------------------------
Failed. Default Property is not set.
Failed. Request property is not set.
Failed. Default request property is not set from heir class
---------------------------------------------------------------------------

======================================================================

Name: sg39081 Date: 03/18/99


The java.net.URLConnection setDefaultRequestProperty(String, String) method does not work, as demonstrated by the following code:

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

public class DefaultRequestProperty
{
public static void main (String[] args)
{
URLConnection.setDefaultRequestProperty("Cookie", "Test");
//BUGBUG: The following line displays 'null' (???)
System.out.println(URLConnection.getDefaultRequestProperty("Cookie"));
}
}

The output should be "Test", rather than null.

Further, net traces show that URLConnection objects created after calling setDefaultRequestProperty do not contain the set header items. Moving the setDefaultRequestProperty method call either before or after the URLConnection has been created has no effect.

The specific problem that I am trying to solve is "disappearing headers" when a redirect is followed: any HTTP headers set by a call to setRequestProperty are forgotten for GET requests that are a result of a redirect. In the case where a cookie is required after the redirect, the page cannot be accessed. Therefore, it seems logical to call setDefaultRequestProperty to set the cookie, so that the cookie will be sent even after redirects are followed. Due to this bug, however, it seems impossible to accomplish this without writing custom redirect code or possibly sockets code.

java full version "JDK-1.2-V"
======================================================================

Name: sg39081 Date: 03/18/99


The setDefaultRequestProperty method in URLConnection
isn't working.

This is particularly annoying for testing servlets that do
browser detects -- I'm trying to mimic different browsers with
the "User-Agent" property.


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

public class URLConnectionTest {
  public static void main(String[] args) {
    try {
      URL url = new URL("http://java.sun.com");
      HttpURLConnection.setDefaultRequestProperty("User-Agent", "Mozilla/4.5");
      // make a connection
      HttpURLConnection con = (HttpURLConnection) url.openConnection();
      System.out.println("DEBUG: DefaultRequestProperty is " + HttpURLConnection.getDefaultRequestProperty("User-Agent"));
      System.out.println("DEBUG: request property is " + con.getRequestProperty("User-Agent"));
      con.setRequestProperty("User-Agent", "Mozilla/4.5");
      System.out.println("DEBUG: request property is " + con.getRequestProperty("User-Agent"));
    }
    catch (Exception e) { // Report any errors that arise
      e.printStackTrace();
    }
  }
}


PRODUCES:

eclipse(521)~/java> java URLConnectionTest
DEBUG: DefaultRequestProperty is null
DEBUG: request property is null
DEBUG: request property is Mozilla/4.5

eclipse(522)~/java> java -fullversion
java full version "Solaris_JDK_1.2_01_dev06_fcsV"
======================================================================