Need help for retrieving parameter containing "\" char from ServletRequest

Question

I'm implementing a portal using Jetspeed 1.4, and I would like to include the "\" character in the login name of a HTML form like below:
login_name=INTRANET\Guest
And in many parts of the programs, it needs to interpret the path to identify the login name via the code segments below:
StringTokenizer st = new StringTokenizer(req.getPathInfo(), "/");
boolean name = true;
String pathPart = null;
while (st.hasMoreTokens()) {
if (name == true) {
tmp = URLDecoder.decode(st.nextToken());
name = false;
else {
pathPart = URLDecoder.decode(st.nextToken());
if (tmp.length() != 0) {
/* start debug */
System.out.println(pathPart);
/* end debug */
add(convert(tmp), pathPart);
name = true;
I expect that I should be able to be retrieved the login name as INTRANET\Guest. However, this is not the case, and I got INTRANET/Guest instead. By looking at the value of req.getPathInfo() of the 1st line, the path has already been wrongly interpreted as:
/media-type/html/user/INTRANET/Guest/page/...
Is there any way I can get the same parameter if "/" character is included? On the other hand, I want to reference the source code of Servlet 2.2 or above, but I can't find it available from java.sun.com, while the only v2.1.1 available here is simply a rubbish. Please help.
Thank you for your attention.

Answer 1

Thank you for your reply. However, because I'm trying to modify the open source, and the login name is hard-coded appended into the path, where effort modifying this is very huge. It will be very convenient if I ca n find an alternative to get the value of getPathInfo() but with "\", or I can reach the source code and modify it straightly.
However, I can't imagine even Servlet 2.2+ source code (2.1.1 is available, but no use) is not made available by anywhere of java.sun.com, including the SCSL. What's so-called open source?!