# Standalone WSGI Containers

There are popular servers written in Python that contain WSGI applications and serve HTTP. These servers stand alone when they run; you can let your clients access them directly or proxy to them from your web server such as Apache or nginx.

## Gunicorn

Gunicorn “Green Unicorn” is a WSGI HTTP Server for UNIX. It’s a pre-fork worker model. Running Supysonic on this server is quite simple. First install Gunicorn with either pip install gunicorn or apt install gunicorn3 (the `gunicorn` package in this case is for Python 2 which isn’t supported anymore). Then:

    $ gunicorn "supysonic.web:create_application()"

But this will only listen on the loopback interface, which isn’t really useful.

Gunicorn provides many command-line options -- see gunicorn -h. For example, to run Supysonic with 4 worker processes (`-w 4`) binding to all IPv4 interfaces on port 5722 (`-b 0.0.0.0:5722`):

    $ gunicorn -w 4 -b 0.0.0.0:5722 "supysonic.web:create_application()"

Note

While gunicorn provides way more options to configure its behaviour than supysonic-server will ever do, the above example is actually equivalent to:

    $ supysonic-server -S gunicorn --processes 4

## uWSGI

uWSGI is a fast application server written in C. It is very configurable which makes it more complicated to setup than Gunicorn.

To use it, install the package `uwsgi` with either pip or apt. Using the later, wou might also need the additional package `uwsgi-plugin-python3`.

Then to run Supysonic in uWSGI:

    $ uwsgi --http-socket 0.0.0.0:5722 --module "supysonic.web:create_application()"

If it complains about an unknown `--module` option, try adding `--plugin python3`:

    $ uwsgi --http-socket 0.0.0.0:5722 --plugin python3 --module "supysonic.web:create_application()"

As uWSGI is highly configurable there are several options you could use to tweak it to your liking. Detailing all it can do is way beyond the scope of this documentation, if you’re interested please refer to its documentation.

If you plan on using uWSGI behind a nginx reverse proxy, note that nginx provides options to integrate directly with uWSGI. You’ll find an example configuration in Flask’s documentation (the framework Supysonic is built upon). Replace the `myapp:app` in their example by `supysonic.web:create_application()` (you might need to enclose it in double-quotes).

## Waitress

Waitress is meant to be a production-quality pure-Python WSGI server with very acceptable performance. It has no dependencies except ones which live in the Python standard library.

As for Gunicorn, using it to run Supysonic is rather simple. Install it using either pip install waitress or apt install python3-waitress. Then start the server this way:

    $ waitress-serve --call supysonic.web:create_application

Waitress behaviour can be tuned through various command-line options -- see waitress-serve --help. If none of them are relevant to you, supysonic-server can actually be used instead:

    $ supysonic-server -S waitress

Both commands are equivalent, with the only difference being the port they listen on.