1 #!/usr/bin/python2.5

     2 #

     3 # Copyright 2009 the Melange authors.

     4 #

     5 # Licensed under the Apache License, Version 2.0 (the "License");

     6 # you may not use this file except in compliance with the License.

     7 # You may obtain a copy of the License at

     8 #

     9 #   http://www.apache.org/licenses/LICENSE-2.0

    10 #

    11 # Unless required by applicable law or agreed to in writing, software

    12 # distributed under the License is distributed on an "AS IS" BASIS,

    13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

    14 # See the License for the specific language governing permissions and

    15 # limitations under the License.

    16 

    17 """Middleware to handle exceptions.

    18 """

    19 

    20 __authors__ = [

    21   '"Sverre Rabbelier" <sverre@rabbelier.nl>',

    22   ]

    23 

    24 

    25 from google.appengine.runtime.apiproxy_errors import CapabilityDisabledError

    26 

    27 from django import http

    28 from django.utils.translation import ugettext

    29 

    30 from soc.views.helper import responses

    31 

    32 

    33 DEF_DOWN_FOR_MAINTENANCE_MSG = ugettext("Down for maintenance")

    34 DEF_IN_UNEXPECTED_MAINTENANCE_MSG = ugettext(

    35       "Down for unexpected maintenance.")

    36 

    37 

    38 class MaintenanceMiddleware(object):

    39   """Middleware to handle maintenance mode.

    40   """

    41 

    42   def maintenance(self, request):

    43     """Returns a 'down for maintenance' view.

    44     """

    45 

    46     context = responses.getUniversalContext(request)

    47     context['page_name'] = ugettext('Maintenance')

    48 

    49     notice = context.pop('site_notice')

    50 

    51     if not notice:

    52       context['body_content'] = DEF_IN_UNEXPECTED_MAINTENANCE_MSG

    53     else:

    54       context['body_content'] = notice

    55 

    56     context['header_title'] = DEF_DOWN_FOR_MAINTENANCE_MSG

    57     context['sidebar_menu_items'] = [

    58         {'heading': DEF_DOWN_FOR_MAINTENANCE_MSG,

    59          'group': ''},

    60         ]

    61 

    62     template = 'soc/base.html'

    63 

    64     return responses.respond(request, template, context=context)

    65 

    66   def process_request(self, request):

    67     context = responses.getUniversalContext(request)

    68 

    69     if not context['is_admin'] and context['in_maintenance']:

    70       return self.maintenance(request)

    71 

    72   def process_exception(self, request, exception):

    73     if isinstance(exception, CapabilityDisabledError):

    74       # assume the site is in maintenance if we get CDE

    75       return maintenance(request)

    76 

    77     # let the exception handling middleware handle it

    78     return None