How to handle non-ASCII Username

[Yaowen Tu]

Hi,

I am using Username Password login handler. But if the username contain
non-ASCII characters it will fail. Somehow the encoding messed up the
string.

What I have done is in login.jsp, add the following line:
<%@ page contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"%>
That means my response is UTF-8 encoded, and also tells browser to encode
in UTF-8 when posting request to server.

But in Shibboleth IdP side, when it retrieves the parameter in
UsernamePasswordLoginServlet.java, it doesn't set the correct encoding
using:
request.setCharacterEncoding("UTF-8");

It just call request.getParameter(..), which will decode in default
"ISO-885901-1".

Then when my JAAS module gets the username it is already messed up. I have
to manually convert the string to UTF-8 manually like:
String correctUsername =  new String(username.getBytes("iso-8859-1"),
"UTF-8");

Changing the UsernamePasswordLoginServlet.java source code is not what I
want to do either.

Is there any better way to resolve this?

Thanks,
Yaowen
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