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mod_wsgi (Apache)
=================
If you are using the `Apache`_ webserver you should consider using `mod_wsgi`_.
.. _Apache: http://httpd.apache.org/
Installing `mod_wsgi`
---------------------
If you don't have `mod_wsgi` installed yet you have to either install it using
a package manager or compile it yourself.
The mod_wsgi `installation instructions`_ cover source installations on UNIX
systems.
If you are using ubuntu / debian you can apt-get it and activate it as follows::
# apt-get install libapache2-mod-wsgi
On FreeBSD install `mod_wsgi` by compiling the `www/mod_wsgi` port or by using
pkg_add::
# pkg_add -r mod_wsgi
If you are using pkgsrc you can install `mod_wsgi` by compiling the
`www/ap2-wsgi` package.
If you encounter segfaulting child processes after the first apache reload you
can safely ignore them. Just restart the server.
Creating a `.wsgi` file
-----------------------
To run your application you need a `yourapplication.wsgi` file. This file
contains the code `mod_wsgi` is executing on startup to get the application
object. The object called `application` in that file is then used as
application.
For most applications the following file should be sufficient::
from yourapplication import app as application
If you don't have a factory function for application creation but a singleton
instance you can directly import that one as `application`.
Store that file somewhere that you will find it again (e.g.:
`/var/www/yourapplication`) and make sure that `yourapplication` and all
the libraries that are in use are on the python load path. If you don't
want to install it system wide consider using a `virtual python`_ instance.
Configuring Apache
------------------
The last thing you have to do is to create an Apache configuration file for
your application. In this example we are telling `mod_wsgi` to execute the
application under a different user for security reasons:
.. sourcecode:: apache
<VirtualHost *>
ServerName example.com
WSGIDaemonProcess yourapplication user=user1 group=group1 threads=5
WSGIScriptAlias / /var/www/yourapplication/yourapplication.wsgi
<Directory /var/www/yourapplication>
WSGIProcessGroup yourapplication
WSGIApplicationGroup %{GLOBAL}
Order deny,allow
Allow from all
</Directory>
</VirtualHost>
For more information consult the `mod_wsgi wiki`_.
.. _mod_wsgi: http://code.google.com/p/modwsgi/
.. _installation instructions: http://code.google.com/p/modwsgi/wiki/QuickInstallationGuide
.. _virtual python: http://pypi.python.org/pypi/virtualenv
.. _mod_wsgi wiki: http://code.google.com/p/modwsgi/wiki/