eventloop.py 文件源码

def make_WebApplicationService(postgresListener, statusWorker):
    from maasserver.webapp import WebApplicationService
    site_port = DEFAULT_PORT  # config["port"]
    # Make a socket with SO_REUSEPORT set so that we can run multiple web
    # applications. This is easier to do from outside of Twisted as there's
    # not yet official support for setting socket options.
    s = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
    # N.B, using the IPv6 INADDR_ANY means that getpeername() returns something
    # like: ('::ffff:192.168.133.32', 40588, 0, 0)
    s.bind(('::', site_port))
    # Use a backlog of 50, which seems to be fairly common.
    s.listen(50)
    # Adopt this socket into Twisted's reactor.
    site_endpoint = AdoptedStreamServerEndpoint(reactor, s.fileno(), s.family)
    site_endpoint.port = site_port  # Make it easy to get the port number.
    site_endpoint.socket = s  # Prevent garbage collection.
    site_service = WebApplicationService(
        site_endpoint, postgresListener, statusWorker)
    return site_service