I received this error : CASClient::BadResponseException MALFORMED CAS RESPONSE when trying to connect to my CAS server.

I presume it's the server fault but since i can't modify it i had to monkey-patch the casclient/responses.rb to make this change :

def check_and_parse_xml(raw_xml)
 raw_xml = raw_xml.encode('UTF-8', :invalid => :replace, :undef => :replace, :replace => '?')
 ...
end

Is there a cleaner way to do it ?