[Twisted-Python] I am having severe problems with guard.
Francisco Miguel Colaço
fcolaco at demnet.ubi.pt
Wed Aug 13 21:45:30 EDT 2003
I am having severe problems with guard. I am making a site in which
users must be authenticated, and a session must be following and
reacting to the user's activities.
I have made the following module.
from twisted.cred.portal import Portal, IRealm
from twisted.web.util import Redirect
import page, model
__implements__ = IRealm
def requestAvatar (self, id, mind, *interfaces):
if IResource not in interfaces:
raise NotImplementedError ('I cannot do non-web logins
## We are in a web login.
m = interfaces.model ## This line should raise an
exception... thus, this is never executed.
m.orig['username'] = id
m.orig['username'] = None
resource = page.Page (m)
resource.putChild ('', SessionWrapper (UsernamePasswordWrapper
(dem_portal, callback = redirectToIndex)))
return IResource, resource, None
## Create an instance of the realm.
dem_realm = Realm ()
from twisted.cred.checkers import
from twisted.web.woven.guard import UsernamePasswordWrapper,
def redirectToIndex (dummy):
"""I will redirect to the site main page.
return Redirect ('/index.rpy')
def createResource ():
## Create a memory checker.
checker = InMemoryUsernamePasswordDatabaseDontUse ()
checker.addUser ('fhc', '12345')
checker.addUser ('humberto', 'zzzzz')
checker.addUser ('aes', 'qa')
## Allow access from unknowns.
anon = AllowAnonymousAccess()
## Create the portal.
dem_portal = Portal (Realm)
m = model.get_new_model ()
upass = UsernamePasswordWrapper (dem_portal, callback =
resource = page.Page (m, templateFile = 'index.template.xhtml')
resource.putChild ('', SessionWrapper (upass))
page.Page is a customized page that works well, lest that the
'init-perspective' link keeps returning 'No such Resource'. The page
as several wchild_, wvfactory_ and wvupdate_ attached to it. I also
would like to contribute back the widgets I have done, as soon as I get
them ready and session aware, if someone has the need for them
(calendar, menu tabs, localized date, title boxes, etc.)
I have sorted the documentation, logged just about any kind of object
dictionary information and even browsed through the sources, but I still
feel completely lost.
If help can be provided by someone, I would appreciate if these
questions could be answered:
1. Why doesn't perspective-init work?
2. How can I put up a customized login page?
3. How can I access the page (resource) within requestAvatar?
4. How can I access the session object from a widget?
5. How can I examine and issue cookies?
I hope this does not give you a lot of trouble. Programming twisted
has been both a wonderful and humbling experience, but I do prefer Woven
to anything I have tried before. I find it an excellent piece of work
and wish to stick with it for my web programming, while I learn the rest
of Twisted for all the other communication needs.
Thanks in advance.
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