相場 API の認証失敗（401）とレート制限（429）のトラブルシューティング

1import os, random, time
2import requests
3
4def get_with_backoff(url: str, params: dict, retries: int = 5) -> dict:
5    delay = 1.0
6    for attempt in range(retries):
7        resp = requests.get(url, params=params, timeout=10)
8        body = resp.json() if resp.content else {}
9        if resp.status_code == 401 or body.get("ret") == 401:
10            raise RuntimeError(f"認証失敗 (ret=401): {body.get('msg', 'token invalid')}")
11        if resp.ok and body.get("ret") == 200:
12            return body
13        if attempt == retries - 1:
14            raise RuntimeError(f"リトライ上限到達: status={resp.status_code} body={body}")
15        time.sleep(delay + random.uniform(0, 0.5))
16        delay = min(delay * 2, 30)
17    return {}
18
19if __name__ == "__main__":
20    url = "https://quote.alltick.co/quote-stock-b-api/trade-tick"
21    params = {
22        "token": os.getenv("ALLTICK_API_TOKEN", "YOUR_API_TOKEN"),
23        "query": '{"trace":"backoff-test","data":{"symbol_list":[{"code":"700.HK"}]}}',
24    }
25    print(get_with_backoff(url, params))