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Metadata-Version: 1.0
Name: zope.authentication
Version: 3.7.1
Summary: Definition of authentication basics for the Zope Framework
Home-page: http://pypi.python.org/pypi/zope.authentication
Author: Zope Corporation and Contributors
Author-email: zope-dev@zope.org
License: ZPL 2.1
Description: This package provides a definition of authentication concepts for use in
        Zope Framework.
        
        
        Detailed Documentation
        ======================
        
        
        ==============
        Logout Support
        ==============
        
        Logout support is defined by a simple interface ILogout:
        
          >>> from zope.authentication.interfaces import ILogout
        
        that has a single 'logout' method.
        
        The current use of ILogout is to adapt an IAuthentication component to ILogout
        To illustrate, we'll create a simple logout implementation that adapts
        IAuthentication:
        
          >>> class SimpleLogout(object):
          ...
          ...     adapts(IAuthentication)
          ...     implements(ILogout)
          ...
          ...     def __init__(self, auth):
          ...         pass
          ...
          ...     def logout(self, request):
          ...         print 'User has logged out'
        
          >>> provideAdapter(SimpleLogout)
        
        and something to represent an authentication utility:
        
          >>> class Authentication(object):
          ...
          ...     implements(IAuthentication)
        
          >>> auth = Authentication()
        
        To perform a logout, we adapt auth to ILogout and call 'logout':
        
          >>> logout = ILogout(auth)
          >>> logout.logout(TestRequest())
          User has logged out
        
        
        The 'NoLogout' Adapter
        ----------------------
        
        The class:
        
          >>> from zope.authentication.logout import NoLogout
        
        can be registered as a fallback provider of ILogout for IAuthentication
        components that are not otherwise adaptable to ILogout. NoLogout's logout
        method is a no-op:
        
          >>> NoLogout(auth).logout(TestRequest())
        
        
        Logout User Interface
        ---------------------
        
        Because some authentication protocols do not formally support logout, it may
        not be possible for a user to logout once he or she has logged in. In such
        cases, it would be inappropriate to present a user interface for logging out.
        
        Because logout support is site-configurable, Zope provides an adapter that,
        when registered, indicates that the site is configured for logout:
        
          >>> from zope.authentication.logout import LogoutSupported
        
        This class merely serves as a flag as it implements ILogoutSupported:
        
          >>> from zope.authentication.interfaces import ILogoutSupported
          >>> ILogoutSupported.implementedBy(LogoutSupported)
          True
        
          >>> request = object()
          >>> ILogoutSupported.providedBy(LogoutSupported(request))
          True
        
        
        ===============
        Principal Terms
        ===============
        
        Principal Terms are used to support browser interfaces for searching principal
        sources. They provide access to tokens and titles for values. The principal
        terms view uses an authentication utility to get principal titles. Let's
        create an authentication utility to demonstrate how this works:
        
          >>> class Principal:
          ...     def __init__(self, id, title):
          ...         self.id, self.title = id, title
        
          >>> from zope.interface import implements
          >>> from zope.authentication.interfaces import IAuthentication
          >>> from zope.authentication.interfaces import PrincipalLookupError
          >>> class AuthUtility:
          ...     implements(IAuthentication)
          ...     data = {'jim': 'Jim Fulton', 'stephan': 'Stephan Richter'}
          ...
          ...     def getPrincipal(self, id):
          ...         title = self.data.get(id)
          ...         if title is not None:
          ...             return Principal(id, title)
          ...         raise PrincipalLookupError
        
        Now we need to install the authentication utility:
        
          >>> from zope.component import provideUtility
          >>> provideUtility(AuthUtility(), IAuthentication)
        
        We need a principal source so that we can create a view from it.
        
          >>> from zope.component import getUtility
          >>> class PrincipalSource:
          ...     def __contains__(self, id):
          ...          auth = getUtility(IAuthentication)
          ...          try:
          ...              auth.getPrincipal(id)
          ...          except PrincipalLookupError:
          ...              return False
          ...          else:
          ...              return True
        
        Now we can create an terms view:
        
          >>> from zope.authentication.principal import PrincipalTerms
          >>> terms = PrincipalTerms(PrincipalSource(), None)
        
        Now we can ask the terms view for terms:
        
          >>> term = terms.getTerm('stephan')
          >>> term.title
          'Stephan Richter'
          >>> term.token
          'c3RlcGhhbg__'
        
        If we ask for a term that does not exist, we get a lookup error:
        
          >>> terms.getTerm('bob')
          Traceback (most recent call last):
          ...
          LookupError: bob
        
        If we have a token, we can get the principal id for it.
        
          >>> terms.getValue('c3RlcGhhbg__')
          'stephan'
        
        
        =======
        CHANGES
        =======
        
        3.7.1 (2010-04-30)
        ------------------
        
        - Removed undeclared testing dependency on zope.testing.
        
        3.7.0 (2009-03-14)
        ------------------
        
        Initial release. This package was split off from ``zope.app.security`` to
        provide a separate common interface definition for authentication utilities
        without extra dependencies.
        
Keywords: zope security authentication
Platform: UNKNOWN
Classifier: Development Status :: 5 - Production/Stable
Classifier: Environment :: Web Environment
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: Zope Public License
Classifier: Programming Language :: Python
Classifier: Natural Language :: English
Classifier: Operating System :: OS Independent
Classifier: Topic :: Internet :: WWW/HTTP
Classifier: Framework :: Zope3