[web2py] url for static file

[黄祥]

hi,

is it possible to store janrain api key on the static folder?
e.g.
from gluon.contrib.login_methods.rpx_account import RPXAccount
auth.settings.actions_disabled = ['register',
                                  'change_password',
                                  'request_reset_password']
api_key = open(URL('static', 'janrain_api_key.txt'),
               'r').read().strip()
auth.settings.login_form = RPXAccount(request,
                                      api_key = api_key,
                                      domain = 'web2py',
                                      url = "http://localhost:8000/%s/
default/user/login" % request.application)

i've already tried it and an error occured, it seems that i must use
absolute url not the relative one, any suggestion about this?

thank you so much in advance