--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/django/contrib/admin/views/decorators.py	Wed Jan 20 00:34:04 2010 +0100
@@ -0,0 +1,77 @@
+import base64
+try:
+    from functools import wraps
+except ImportError:
+    from django.utils.functional import wraps  # Python 2.3, 2.4 fallback.
+
+from django import http, template
+from django.conf import settings
+from django.contrib.auth.models import User
+from django.contrib.auth import authenticate, login
+from django.shortcuts import render_to_response
+from django.utils.translation import ugettext_lazy, ugettext as _
+
+ERROR_MESSAGE = ugettext_lazy("Please enter a correct username and password. Note that both fields are case-sensitive.")
+LOGIN_FORM_KEY = 'this_is_the_login_form'
+
+def _display_login_form(request, error_message=''):
+    request.session.set_test_cookie()
+    return render_to_response('admin/login.html', {
+        'title': _('Log in'),
+        'app_path': request.get_full_path(),
+        'error_message': error_message
+    }, context_instance=template.RequestContext(request))
+
+def staff_member_required(view_func):
+    """
+    Decorator for views that checks that the user is logged in and is a staff
+    member, displaying the login page if necessary.
+    """
+    def _checklogin(request, *args, **kwargs):
+        if request.user.is_authenticated() and request.user.is_staff:
+            # The user is valid. Continue to the admin page.
+            return view_func(request, *args, **kwargs)
+
+        assert hasattr(request, 'session'), "The Django admin requires session middleware to be installed. Edit your MIDDLEWARE_CLASSES setting to insert 'django.contrib.sessions.middleware.SessionMiddleware'."
+
+        # If this isn't already the login page, display it.
+        if LOGIN_FORM_KEY not in request.POST:
+            if request.POST:
+                message = _("Please log in again, because your session has expired.")
+            else:
+                message = ""
+            return _display_login_form(request, message)
+
+        # Check that the user accepts cookies.
+        if not request.session.test_cookie_worked():
+            message = _("Looks like your browser isn't configured to accept cookies. Please enable cookies, reload this page, and try again.")
+            return _display_login_form(request, message)
+        else:
+            request.session.delete_test_cookie()
+
+        # Check the password.
+        username = request.POST.get('username', None)
+        password = request.POST.get('password', None)
+        user = authenticate(username=username, password=password)
+        if user is None:
+            message = ERROR_MESSAGE
+            if '@' in username:
+                # Mistakenly entered e-mail address instead of username? Look it up.
+                users = list(User.objects.filter(email=username))
+                if len(users) == 1 and users[0].check_password(password):
+                    message = _("Your e-mail address is not your username. Try '%s' instead.") % users[0].username
+                else:
+                    # Either we cannot find the user, or if more than 1
+                    # we cannot guess which user is the correct one.
+                    message = _("Usernames cannot contain the '@' character.")
+            return _display_login_form(request, message)
+
+        # The user data is correct; log in the user in and continue.
+        else:
+            if user.is_active and user.is_staff:
+                login(request, user)
+                return http.HttpResponseRedirect(request.get_full_path())
+            else:
+                return _display_login_form(request, ERROR_MESSAGE)
+
+    return wraps(view_func)(_checklogin)