[Zope] exception handling for zclient

i'm using zclient as outlined in http://www.zope.org/Members/lstaffor/ZClientMethod to serve pages from another web server as if they were being served form my zope server. how would i write an exception to handle the case of the other web server being down? when the other web server is down, i'd like to include a bit of text saying "this service is temporarily unavailable. blah, blah, blah...". from ZPublisher import Client def web_client(url = 'http://www.server.com/', username = None, password = None, **kw): '''access http server''' if kw: return Client.call(url,username,password,kw)[1] else: return Client.call(url,username,password)[1]