startup.py

from multiprocessing import Process
import os
from pathlib import Path
import requests
from requests.adapters import HTTPAdapter
from urllib3 import Retry
import uvicorn
import webbrowser


def main(host, port, confpath, reload, debug, root) -> None:

    if root:
        os.environ['SVLT_SESSION_ROOT'] = root

    server_process = Process(
        target=uvicorn.run,
        args=(f'{confpath}:app',),
        kwargs={
            'app_dir': '..',
            'host': host,
            'port': int(port),
            'log_level': 'debug',
            'reload': reload,
        },
        daemon=(reload is False),
    )
    url = f'http://{host}:{int(port):04d}/status'
    print(url)
    server_process.start()

    try:
        sesh = requests.Session()
        retries = Retry(
            total=10,
            backoff_factor=0.5,
        )
        sesh.mount('http://', HTTPAdapter(max_retries=retries))
        resp = sesh.get(url)
        assert resp.status_code == 200
    except Exception:
        print('Error starting server')
        server_process.terminate()
        exit()

    webbrowser.open(url, new=1, autoraise=True)

    if debug:
        print('Running in debug mode')
    print('Type "STOP" to stop server')
    input_str = ''
    while input_str.upper() != 'STOP':
        input_str = input()

    server_process.terminate()