balkian.github.com/_posts/2014-10-09-proxies.markdown

---
layout: post
title:  "Proxies with Apache and python"
date:   2014-10-09 10:00:00
tags: python apache proxy gunicorn uwsgi
---

This is a quick note on proxying a local python application (e.g. flask) to a subdirectory in Apache.
This assumes that the file wsgi.py contains a WSGI application with the name *application*. Hence, wsgi:application.

## Gunicorn
{% highlight apache %}
<Location /myapp/>
    ProxyPass http://127.0.0.1:8888/myapp/
    ProxyPassReverse http://127.0.0.1:8888/myapp/
    RequestHeader set SCRIPT_NAME "/myapp/"
</Location>
{% endhighlight %}

**Important**: *SCRIPT_NAME* and the end of *ProxyPass* URL  **MUST BE THE SAME**. Otherwise, Gunicorn will fail miserably.

Try it with:
{% highlight bash %}
venv/bin/gunicorn -w 4 -b 127.0.0.1:8888 --log-file - --access-logfile - wsgi:application
{% endhighlight %}


## UWSGI 
This is a very simple configuration. I will try to upload one with more options for uwsgi (in a .ini file).

{% highlight apache %}
<Location /myapp/>
    SetHandler uwsgi_handler
    uWSGISocker 127.0.0.1:8888
</Location>
{% endhighlight %}

Try it with:

{% highlight bash %}
uwsgi --socket 127.0.0.1:8888 -w wsgi:application
{% endhighlight %}

### Extra: Supervisor
If everything went as expected, you can wrap your command in a supervisor config file and let it handle the server for you.
{% highlight ini %}
[unix_http_server]
file=/tmp/myapp.sock                       ; path to your socket file

[supervisord]
logfile = %(here)s/logs/supervisor.log
childlogdir = %(here)s/logs/

[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface

[supervisorctl]
logfile = %(here)s/logs/supervisorctl.log
serverurl=unix:///tmp/supervisor.sock         ; use a unix:// URL  for a unix socket


[program:myapp]
command = venv/bin/gunicorn -w 4 -b 0.0.0.0:5000 --log-file %(here)s/logs/gunicorn.log --access-logfile - wsgi:application
directory = %(here)s
environment = PATH=%(here)s/venv/bin/
logfile = %(here)s/logs/myapp.log
{% endhighlight %}