pinger.py

#!/usr/bin/env python3

import asyncio
import aiohttp
from os import getenv

async def fetch(session: aiohttp.ClientSession, url: str):
  async with session.get(url) as response:
    return response

async def fetch_all(urls: list[str]):
  async with aiohttp.ClientSession(loop=asyncio.get_event_loop()) as session:
    results = await asyncio.gather(*[fetch(session, url) for url in urls], return_exceptions=True)
    return results

def main():
  url_list = getenv('PING_URLS', '').split(',')
  urls = [a for a in url_list if a]
  htmls = asyncio.run(fetch_all(urls))
  print(f'Pinged {len(urls)} url{"s" if len(urls) > 1 else "" }!')

if __name__ == '__main__':
  main()