CGI === If all other deployment methods do not work, CGI will work for sure. CGI is supported by all major servers but usually has a less-than-optimal performance. This is also the way you can use a Flask application on Google's `App Engine`_, there however the execution does happen in a CGI-like environment. The application's performance is unaffected because of that. .. admonition:: Watch Out Please make sure in advance that your ``app.run()`` call you might have in your application file, is inside an ``if __name__ == '__main__':`` or moved to a separate file. Just make sure it's not called because this will always start a local WSGI server which we do not want if we deploy that application to CGI / app engine. .. _App Engine: http://code.google.com/appengine/ Creating a `.cgi` file ---------------------- First you need to create the CGI application file. Let's call it `yourapplication.cgi`:: #!/usr/bin/python from wsgiref.handlers import CGIHandler from yourapplication import app CGIHandler().run(app) If you're running Python 2.4 you will need the :mod:`wsgiref` package. Python 2.5 and higher ship this as part of the standard library. Server Setup ------------ Usually there are two ways to configure the server. Either just copy the `.cgi` into a `cgi-bin` (and use `mod_rerwite` or something similar to rewrite the URL) or let the server point to the file directly. In Apache for example you can put a like like this into the config: .. sourcecode:: apache ScriptAlias /app /path/to/the/application.cgi For more information consult the documentation of your webserver.