utils.py 文件源码

def retry_session():
    # This will give the total wait time in minutes:
    # >>> sum([min((0.3 * (2 ** (i - 1))), 120) / 60 for i in range(24)])
    # >>> 30.5575
    # This works by the using the minimum time in seconds of the backoff time
    # and the max back off time which defaults to 120 seconds. The backoff time
    # increases after every failed attempt.
    session = requests.Session()
    retry = Retry(
        total=24,
        read=5,
        connect=24,
        backoff_factor=0.3,
        status_forcelist=(500, 502, 504),
        method_whitelist=('GET', 'POST'),
    )
    adapter = HTTPAdapter(max_retries=retry)
    session.mount('http://', adapter)
    session.mount('https://', adapter)
    return session