Name: nt126004 Date: 08/24/2001


java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b65)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b65, mixed mode)

Java 1.4 is definitively much better at URL parsing
than 1.3. However, 1.4 beta still has a few nits...

DESCRIPTION OF EXPECTED VERSUS ACTUAL RESULTS
=============================================

Undefined Hosts are not Empty Hosts
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The absolute URL: "http:path" is parsed:
Protocol: "http"
Authority: (undefined)
  UserInfo: (undefined)
Host: "" <=== NO. the host is undefined.
Port: -1 <=== where -1 does not mean "default"
Path: "path"
Query: (undefined)
Ref: (undefined)

Compare with the absolute URL: http:///path, which does have
an empty host.

IPV6 references - incorrect host
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The absolute URL: "http://[a:b:c]" is parsed:
Protocol: "http"
Authority: "[a:b:c]"
  UserInfo: (undefined)
Host: "a:b:c" <=== NO. the host is "[a:b:c]".
Port: -1
Path: "path"
Query: (undefined)
Ref: (undefined)

Because, according to RFC 2732:
      host = hostname | IPv4address | IPv6reference
      ipv6reference = "[" IPv6address "]"


IPV6 references - empty port is allowed
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The absolute URL "http://[a:b:c]:" is correct.
but generates a java.net.MalformedURLException
when parsed.

It should parse:
Protocol: "http"
Authority: "[a:b:c]"
  UserInfo: (undefined)
Host: "[a:b:c]"
Port: -1
Path: ""
Query: (undefined)
Ref: (undefined)

Because, according to RFC 2396:
      hostport = host [ ":" port ]
      port = *digit


EXACT STEPS TO REPRODUCE THE PROBLEM.
=====================================

Compile and run the following JAVA source.


COMPLETE JAVA SOURCE CODE THAT DEMONSTRATES THE PROBLEM. (TEST PROGRAM)
=======================================================================

import java.net.*;

class URLTest {
   public static void main(String[] arg) {
      String urls[] = {
         "http:path",
         "http://[a:b:c]",
         "http://[a:b:c]:"
      };
      for (int i=0; i < urls.length; ++i) {
         System.out.println("------------------ URL: " + urls[i]);
         try {
            URL anURL = new URL(urls[i]);
            showURL(anURL);
         }
         catch (MalformedURLException e) {
            System.out.println("Malformed URI: " + e.getMessage());
         }
      }
   }

   public static void showURL(URL url) {
      System.out.println("Protocol: " + ((url.getProtocol() ==
null)? "(undefined)" : ("\"" + url.getProtocol() + "\"")));
      System.out.println("Authority: " + ((url.getAuthority() ==
null)? "(undefined)" : ("\"" + url.getAuthority() + "\"")));
      System.out.println("UserInfo: " + ((url.getUserInfo() ==
null)? "(undefined)" : ("\"" + url.getUserInfo() + "\"")));
      System.out.println("Host: " + ((url.getHost() ==
null)? "(undefined)" : ("\"" + url.getHost() + "\"")));
      System.out.println("Port: \"" + Integer.toString(url.getPort())
+ "\"");
      System.out.println("Path: " + ((url.getPath() ==
null)? "(undefined)" : ("\"" + url.getPath() + "\"")));
      System.out.println("Query: " + ((url.getQuery() ==
null)? "(undefined)" : ("\"" + url.getQuery() + "\"")));
      System.out.println("Ref: " + ((url.getRef() ==
null)? "(undefined)" : ("\"" + url.getRef() + "\"")));
   }
}

PRODUCED OUTPUT.
================

------------------ URL: http:path
Protocol: "http"
Authority: (undefined)
  UserInfo: (undefined)
Host: ""
Port: "-1"
Path: "path"
Query: (undefined)
Ref: (undefined)
------------------ URL: http://[a:b:c]
Protocol: "http"
Authority: "[a:b:c]"
  UserInfo: (undefined)
Host: "a:b:c"
Port: "-1"
Path: ""
Query: (undefined)
Ref: (undefined)
------------------ URL: http://[a:b:c]:
Malformed URI:


ADDITIONAL CONFIGURATION INFORMATION.
=====================================
None.
(Review ID: 130601)
======================================================================