web_util.py 文件源码

def retry(retries=CONFIG.CRAWLER.RETRY or 3, sleep=CONFIG.CRAWLER.SLEEP,
          changeip=False):
    """??????????????????????retrying
    pip install retrying
    https://github.com/rholder/retrying
    ??????????
    http://mp.weixin.qq.com/s?__biz=MzAwMDU1MTE1OQ==&mid=2653547274&idx=1&sn=52e5037b163146c1656eedce2da1ecd8&scene=1&srcid=0527MEXhNRZATtlTPhinD5Re#rd

    :param retries: number int of retry times.
    301 Moved Temporarily
    401 Unauthorized
    403 Forbidden
    404 Not Found
    408 Request Timeout
    429 Too Many Requests
    503 Service Unavailable
    """
    def _retry(func):
        @wraps(func)
        def _wrapper(*args, **kwargs):
            index = 0
            while index < retries:
                index += 1
                try:
                    response = func(*args, **kwargs)
                    if response.status_code in (301, 302, 404, 500):
                        print('status_code', response.status_code)
                        break
                    elif response.status_code != 200:
                        print(response.status_code)
                        if changeip:
                            change_ip()
                        continue
                    else:
                        break
                except Exception as e:
                    # ???????????
                    # traceback.print_exc()
                    response = None
                    if isinstance(e, Timeout):
                        if sleep is not None:
                            time.sleep(sleep + randint(1, 10))
                        continue
                    elif isinstance(e, TooManyRedirects):
                        break

            return response
        return _wrapper
    return _retry