Viewing file:  guarded.py (2.82 KB) -rw-r--r--
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from zope.interface import implements
from twisted.cred import portal, checkers, credentials
from nevow import inevow, rend, tags, guard, loaders
### Renderers
class NotLoggedIn(rend.Page):
"""The resource that is returned when you are not logged in"""
addSlash = True
docFactory = loaders.stan(
tags.html[
tags.head[tags.title["Not Logged In"]],
tags.body[
tags.form(action=guard.LOGIN_AVATAR, method='post')[
tags.table[
tags.tr[
tags.td[ "Username:" ],
tags.td[ tags.input(type='text',name='username') ],
],
tags.tr[
tags.td[ "Password:" ],
tags.td[ tags.input(type='password',name='password') ],
]
],
tags.input(type='submit'),
tags.p,
]
]
]
)
class LoggedIn(rend.Page):
"""The resource that is returned when you login"""
addSlash = True
docFactory = loaders.stan(
tags.html[
tags.head[tags.title["Logged In"]],
tags.body[
tags.h3(render=tags.directive("welcome")),
tags.a(href=guard.LOGOUT_AVATAR)["Logout"]
]
]
)
def render_welcome(self, context, data):
return context.tag[ "Hello, %s!" % data]
def logout(self):
## self.original is the page's main data -- the object that was passed in to the constructor, and
## the object that is initially passed as the 'data' parameter to renderers
print "%s logged out!" % self.original
### Authentication
def noLogout():
return None
class MyRealm:
"""A simple implementor of cred's IRealm.
For web, this gives us the LoggedIn page.
"""
implements(portal.IRealm)
def requestAvatar(self, avatarId, mind, *interfaces):
for iface in interfaces:
if iface is inevow.IResource:
# do web stuff
if avatarId is checkers.ANONYMOUS:
resc = NotLoggedIn()
resc.realm = self
return (inevow.IResource, resc, noLogout)
else:
resc = LoggedIn(avatarId)
resc.realm = self
return (inevow.IResource, resc, resc.logout)
raise NotImplementedError("Can't support that interface.")
### Application setup
def createResource():
realm = MyRealm()
porta = portal.Portal(realm)
myChecker = checkers.InMemoryUsernamePasswordDatabaseDontUse()
myChecker.addUser("user","password")
myChecker.addUser("fred", "flintstone")
porta.registerChecker(checkers.AllowAnonymousAccess(), credentials.IAnonymous)
porta.registerChecker(myChecker)
res = guard.SessionWrapper(porta)
return res
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