gunicorn configurable app

guni.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os
import multiprocessing
from itertools import chain

from gunicorn import util
from gunicorn.config import Config
from gunicorn.app.base import Application


class ConfigurableApplication(Application):

    @staticmethod
    def default_cfg():
        return {
            "worker_class": "sync",
            "workers": multiprocessing.cpu_count() * 2 + 1,
            "secure_scheme_headers": {
                'X-FORWARDED-PROTO': 'https',
            },
            "user": 'nobody' if os.getuid() == 0 else os.getuid()
        }

    def __init__(self, app_uri, **config):
        self.app_uri = app_uri
        self._config = config
        super(ConfigurableApplication, self).__init__()

    def load(self):
        app = util.import_app(self.app_uri)
        print("init here?")
        return app

    def init(self, parser, opts, args):
        self.cfg.set("default_proc_name", self.app_uri)

    def load_config(self):
        self.cfg = Config()
        for k, v in chain(self.default_cfg().items(), self._config.items()):
            self.cfg.set(k.lower(), v)


if __name__ == '__main__':
    ConfigurableApplication(
        "main:app",
        bind="0.0.0.0:5321",
        preload_app=True
    ).run()