urlwait 1.0

安装

$ pip install urlwait

用法

$ urlwait --help

Usage:

    $ urlwait [SERVICE URL] [TIMEOUT]

    SERVICE URL is a connection url, e.g. a typical value for $DATABASE_URL. TIMEOUT is
    a number of seconds to try to connect to the host and port specified in the SERVICE
    URL. These values may also be specified in environment variables, but command line
    args take precedence:

        URLWAIT_VARNAME: the env var name containing the URL to check. Default DATABASE_URL.
        URLWAIT_TIMEOUT: the number of seconds to wait. Default 15.

    Returns a 0 status if the connection completed successfully before the timeout, or 1 if not.
    It is designed for use with Docker or other dev or testing environments where the connected
    services and the app are started simultaneously, but one should wait for the other.

Examples:

    The following are equivalent:

    $ urlwait redis://localhost:6379/0 20
    $ urlwait $CACHE_URL 20
    $ URLWAIT_VARNAME=CACHE_URL URLWAIT_TIMEOUT=20 urlwait

该模块也可用于您的Python代码中

import os

from urlwait import wait_for_url


if wait_for_url(os.getenv('REDIS_URL')):
    # do things with the service
else:
    # service likely did not start

如果您没有服务URL但有主机和端口号，您可以使用 wait_for_service(host, port, timeout) 函数代替。

Python支持

自版本1.0起，urlwait仅支持Python 3。如果您需要Python 2.7支持，您可以使用版本低于1.0的版本。

变更日志

• 1.0 - 2020-02-28 * 关闭套接字以防止Python报错。感谢@callahad！ * 更新测试以仅针对Python 3.6+进行测试 * 停止支持Python 2.x

• 0.4 - 2017-03-02 - 如果协议是sqlite，则始终返回true