def _loginSucceeded(self, args):
"""
Handle login success by wrapping the resulting L{IResource} avatar
so that the C{logout} callback will be invoked when rendering is
complete.
"""
interface, avatar, logout = args
class ResourceWrapper(proxyForInterface(IResource, 'resource')):
"""
Wrap an L{IResource} so that whenever it or a child of it
completes rendering, the cred logout hook will be invoked.
An assumption is made here that exactly one L{IResource} from
among C{avatar} and all of its children will be rendered. If
more than one is rendered, C{logout} will be invoked multiple
times and probably earlier than desired.
"""
def getChildWithDefault(self, name, request):
"""
Pass through the lookup to the wrapped resource, wrapping
the result in L{ResourceWrapper} to ensure C{logout} is
called when rendering of the child is complete.
"""
return ResourceWrapper(self.resource.getChildWithDefault(name, request))
def render(self, request):
"""
Hook into response generation so that when rendering has
finished completely (with or without error), C{logout} is
called.
"""
request.notifyFinish().addBoth(lambda ign: logout())
return super(ResourceWrapper, self).render(request)
return ResourceWrapper(avatar)
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