util.py 文件源码

def _get_agent():
    context_factory = MyWebClientContextFactory()
    try:
        # HTTPConnectionPool has been present since Twisted version 12.1
        from twisted.web.client import HTTPConnectionPool
        pool = HTTPConnectionPool(reactor, persistent=True)
        pool.maxPersistentPerHost = _MAX_PERSISTENT_PER_HOST
        pool.cachedConnectionTimeout = _CACHED_CONNECTION_TIMEOUT
        agent = Agent(reactor, context_factory,
                      connectTimeout=_CONNECT_TIMEOUT, pool=pool)
    except ImportError:
        from _zenclient import ZenAgent
        agent = ZenAgent(reactor, context_factory, persistent=True, maxConnectionsPerHostName=1)
    return agent