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Description

django-maintenance-mode shows a 503 error page when maintenance-mode is on. It works at application level, so your django instance should be up. It doesn't use database and doesn't prevent database access.

Programming language: Python
License: MIT License
Tags: Build Tools     Django     1.7     1.8     1.9     1.10     1.11     2.0     2.1     2.2     3.0     Maintenance     Maintenance Mode    
Latest version: v0.14.0

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README

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django-maintenance-mode

django-maintenance-mode shows a 503 error page when maintenance-mode is on.

It works at application level, so your django instance should be up.

It doesn't use database and doesn't prevent database access.

Requirements

  • Python 2.7, 3.4, 3.5, 3.6, 3.7, 3.8
  • Django 1.7, 1.8, 1.9, 1.10, 1.11, 2.0, 2.1, 2.2, 3.0

Installation

  1. Run pip install django-maintenance-mode or download django-maintenance-mode and add the maintenance_mode package to your project
  2. Add 'maintenance_mode' to settings.INSTALLED_APPS before custom applications
  3. Add 'maintenance_mode.middleware.MaintenanceModeMiddleware' to settings.MIDDLEWARE_CLASSES/settings.MIDDLEWARE as last middleware
  4. Add 'maintenance_mode.context_processors.maintenance_mode' to settings.CONTEXT_PROCESSORS
  5. Add your custom templates/503.html file
  6. Restart your application server

Configuration (optional)

Settings

All these settings are optional, if not defined in settings.py the default values (listed below) will be used.

# if True the maintenance-mode will be activated
MAINTENANCE_MODE = None
# by default, to get/set the state value a local file backend is used
# if you want to use the db or cache, you can create a custom backend
# custom backends must extend 'maintenance_mode.backends.AbstractStateBackend' class
# and implement get_value(self) and set_value(self, val) methods
MAINTENANCE_MODE_STATE_BACKEND = 'maintenance_mode.backends.LocalFileBackend'
# by default, a file named "maintenance_mode_state.txt" will be created in the settings.py directory
# you can customize the state file path in case the default one is not writable
MAINTENANCE_MODE_STATE_FILE_PATH = 'maintenance_mode_state.txt'
# if True admin site will not be affected by the maintenance-mode page
MAINTENANCE_MODE_IGNORE_ADMIN_SITE = False
# if True anonymous users will not see the maintenance-mode page
MAINTENANCE_MODE_IGNORE_ANONYMOUS_USER = False
# if True authenticated users will not see the maintenance-mode page
MAINTENANCE_MODE_IGNORE_AUTHENTICATED_USER = False
# if True the staff will not see the maintenance-mode page
MAINTENANCE_MODE_IGNORE_STAFF = False
# if True the superuser will not see the maintenance-mode page
MAINTENANCE_MODE_IGNORE_SUPERUSER = False
# list of ip-addresses that will not be affected by the maintenance-mode
# ip-addresses will be used to compile regular expressions objects
MAINTENANCE_MODE_IGNORE_IP_ADDRESSES = ()
# the path of the function that will return the client IP address given the request object -> 'myapp.mymodule.myfunction'
# the default function ('maintenance_mode.utils.get_client_ip_address') returns request.META['REMOTE_ADDR']
# in some cases the default function returns None, to avoid this scenario just use 'django-ipware'
MAINTENANCE_MODE_GET_CLIENT_IP_ADDRESS = None

Retrieve user's real IP address using django-ipware:

MAINTENANCE_MODE_GET_CLIENT_IP_ADDRESS = 'ipware.ip.get_ip'
# list of urls that will not be affected by the maintenance-mode
# urls will be used to compile regular expressions objects
MAINTENANCE_MODE_IGNORE_URLS = ()
# if True the maintenance mode will not return 503 response while running tests
# useful for running tests while maintenance mode is on, before opening the site to public use
MAINTENANCE_MODE_IGNORE_TESTS = False
# the absolute url where users will be redirected to during maintenance-mode
MAINTENANCE_MODE_REDIRECT_URL = None
# the template that will be shown by the maintenance-mode page
MAINTENANCE_MODE_TEMPLATE = '503.html'
# the path of the function that will return the template context -> 'myapp.mymodule.myfunction'
MAINTENANCE_MODE_GET_TEMPLATE_CONTEXT = None
# the HTTP status code to send
MAINTENANCE_MODE_STATUS_CODE = 503
# the value in seconds of the Retry-After header during maintenance-mode
MAINTENANCE_MODE_RETRY_AFTER = 3600 # 1 hour

URLs

Add maintenance_mode.urls to urls.py if you want superusers able to set maintenance_mode using urls.

urlpatterns = [
    # ...
    url(r'^maintenance-mode/', include('maintenance_mode.urls')),
    # ...
]

Context Processors

Add maintenance_mode.context_processors.maintenance_mode to your context_processors list in settings.py if you want to access the maintenance_mode status in your templates.

TEMPLATES = [
    {
        # ...
        'OPTIONS': {
            'context_processors': [
                # ...
                'maintenance_mode.context_processors.maintenance_mode',
                # ...
            ],
        },
        # ...
    },
]

Views

You can force maintenance mode on/off at view level using view decorators:

from maintenance_mode.decorators import force_maintenance_mode_off, force_maintenance_mode_on

@force_maintenance_mode_off
def my_view_a(request):
    # never return 503 response
    pass

@force_maintenance_mode_on
def my_view_b(request):
    # always return 503 response
    pass

Usage

Python

from maintenance_mode.core import get_maintenance_mode, set_maintenance_mode

set_maintenance_mode(True)

if get_maintenance_mode():
    set_maintenance_mode(False)

or

from django.core.management import call_command
from django.core.management.base import BaseCommand


class Command(BaseCommand):

    def handle(self, *args, **options):

        call_command('maintenance_mode', 'on')

        # call your command(s)

        call_command('maintenance_mode', 'off')



Templates

{% if maintenance_mode %}
<!-- html -->
{% endif %}

Terminal

Run python manage.py maintenance_mode <on|off>

(This is not Heroku-friendly because* any execution of heroku run* manage.py will be run on a separate worker dyno, not the web one. Therefore **the state-file is set but on the wrong machine. You should use a custom** MAINTENANCE_MODE_STATE_BACKEND.)

URLs

Superusers can change maintenance-mode using the following urls:

/maintenance-mode/off/

/maintenance-mode/on/

Testing

# create python 3.7 virtual environment
virtualenv testing_django_maintanance_mode -p "python3.7" --no-site-packages

# activate virtualenv
cd testing_django_maintanance_mode && . bin/activate

# clone repo
git clone https://github.com/fabiocaccamo/django-maintenance-mode.git src && cd src

# run tests
python setup.py test

License

Released under [MIT License](LICENSE.txt).


*Note that all licence references and agreements mentioned in the django-maintenance-mode README section above are relevant to that project's source code only.