<%
require 'cgi/session'
session = CGI::Session.new( cgi = CGI.new('html4') )
begin
    session['var'] = 'xxx'

# You WILL use sessions from mod_ruby, so don't forget this
# for closing it (ie. closing the session-file, by default).
# See: http://www.modruby.net/doc/faq.en.html#label:14
ensure
    cgi.header      # *NASTY* hack to flush stuff to actually make the
                    # session live -- needed only for creating a session
                    # Any nicer way, please?? (I DO NOT want to
                    # clutter my "main stuff" (above) with cgi.calls, as
                    # I only need sessions, and conceptually, CGI has
                    # nothing to do with that.  I want a clean page ...)
    session.close
end
%>