Concurrent HTTP Requests with AsyncIO and HTTPX in Python

import asyncio
import httpx
from typing import List, Dict, Any

async def fetch_status(client: httpx.AsyncClient, semaphore: asyncio.Semaphore, url: str) -> Dict[str, Any]:
    async with semaphore:
        try:
            resp = await client.get(url, timeout=10.0)
            return {'url': url, 'status_code': resp.status_code, 'healthy': resp.status_code == 200}
        except Exception as e:
            return {'url': url, 'status_code': None, 'healthy': False, 'error': str(e)}

async def check_all(urls: List[str]) -> List[Dict[str, Any]]:
    sem = asyncio.Semaphore(15)
    async with httpx.AsyncClient(limits=httpx.Limits(max_connections=50)) as client:
        tasks = [fetch_status(client, sem, url) for url in urls]
        return await asyncio.gather(*tasks)