run_gunicorn.py

# Copypasta of Django's runserver management command, modified to use gunicorn http://github.com/benoitc/gunicorn

import sys

from optparse import make_option

import django
from django.core.management.base import BaseCommand, CommandError
from django.conf import settings
from django.utils import translation
from django.core.servers.basehttp import AdminMediaHandler, WSGIServerException
from django.core.handlers.wsgi import WSGIHandler

import gunicorn

class Command(BaseCommand):
    option_list = BaseCommand.option_list + (
        make_option('--adminmedia', dest='admin_media_path', default='',
            help='Specifies the directory from which to serve admin media.'),
        make_option('--workers', dest='workers', default='1',
            help='Specifies the number of worker processes to use.')
    )
    help = "Starts a fully-functional Web server for development."
    args = '[optional port number, or ipaddr:port]'

    # Validation is called explicitly each time the server is reloaded.
    requires_model_validation = False

    def handle(self, addrport='', *args, **options):
        if args:
            raise CommandError('Usage is runserver %s' % self.args)
        if not addrport:
            addr = ''
            port = '8000'
        else:
            try:
                addr, port = addrport.split(':')
            except ValueError:
                addr, port = '', addrport
        if not addr:
            addr = '127.0.0.1'

        if not port.isdigit():
            raise CommandError("%r is not a valid port number." % port)

        admin_media_path = options.get('admin_media_path', '')
        workers = int(options.get('workers', '1'))
        quit_command = (sys.platform == 'win32') and 'CTRL-BREAK' or 'CONTROL-C'

        print "Validating models..."
        self.validate(display_num_errors=True)
        print "\nDjango version %s, using settings %r" % (django.get_version(), settings.SETTINGS_MODULE)
        print "Development server is running at http://%s:%s/" % (addr, port)
        print "Quit the server with %s." % quit_command

        # django.core.management.base forces the locale to en-us.
        translation.activate(settings.LANGUAGE_CODE)

        try:
            handler = AdminMediaHandler(WSGIHandler(), admin_media_path)
            arbiter = gunicorn.Arbiter((addr, int(port)), workers, handler)
            arbiter.run()
        except WSGIServerException, e:
            # Use helpful error messages instead of ugly tracebacks.
            ERRORS = {
                13: "You don't have permission to access that port.",
                98: "That port is already in use.",
                99: "That IP address can't be assigned-to.",
            }
            try:
                error_text = ERRORS[e.args[0].args[0]]
            except (AttributeError, KeyError):
                error_text = str(e)
            sys.stderr.write(self.style.ERROR("Error: %s" % error_text) + '\n')
            # Need to use an OS exit because sys.exit doesn't work in a thread
            sys.exit(1)