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73 lines
2.6 KiB
Plaintext
73 lines
2.6 KiB
Plaintext
=======================
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How to deploy with WSGI
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=======================
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Django's primary deployment platform is WSGI_, the Python standard for web
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servers and applications.
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.. _WSGI: http://www.wsgi.org
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Django's :djadmin:`startproject` management command sets up a simple default
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WSGI configuration for you, which you can tweak as needed for your project, and
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direct any WSGI-compliant webserver to use. Django includes getting-started
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documentation for the following WSGI servers:
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.. toctree::
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:maxdepth: 1
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modwsgi
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gunicorn
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uwsgi
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The ``application`` object
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--------------------------
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One key concept of deploying with WSGI is to specify a central ``application``
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callable object which the webserver uses to communicate with your code. This is
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commonly specified as an object named ``application`` in a Python module
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accessible to the server.
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.. versionchanged:: 1.4
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The :djadmin:`startproject` command creates a :file:`projectname/wsgi.py` that
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contains such an application callable.
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.. note::
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Upgrading from a previous release of Django and don't have a :file:`wsgi.py`
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file in your project? You can simply add one to your project's top-level
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Python package (probably next to :file:`settings.py` and :file:`urls.py`)
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with the contents below. If you want :djadmin:`runserver` to also make use
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of this WSGI file, you can also add ``WSGI_APPLICATION =
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"mysite.wsgi.application"`` in your settings (replacing ``mysite`` with the
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name of your project).
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Initially this file contains::
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import os
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os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")
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# This application object is used by the development server
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# as well as any WSGI server configured to use this file.
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from django.core.wsgi import get_wsgi_application
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application = get_wsgi_application()
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The ``os.environ.setdefault`` line just sets the default settings module to
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use, if you haven't explicitly set the :envvar:`DJANGO_SETTINGS_MODULE`
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environment variable. You'll need to edit this line to replace ``mysite`` with
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the name of your project package, so the path to your settings module is
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correct.
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To apply `WSGI middleware`_ you can simply wrap the application object
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in the same file::
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from helloworld.wsgi import HelloWorldApplication
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application = HelloWorldApplication(application)
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You could also replace the Django WSGI application with a custom WSGI
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application that later delegates to the Django WSGI application, if you want to
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combine a Django application with a WSGI application of another framework.
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.. _`WSGI middleware`: http://www.python.org/dev/peps/pep-3333/#middleware-components-that-play-both-sides
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