server.py 文件源码

def _tcp_listener(address, backlog=50, reuse_addr=None, family=_socket.AF_INET):
    """A shortcut to create a TCP socket, bind it and put it into listening state."""
    sock = socket(family=family)
    if reuse_addr is not None:
        sock.setsockopt(_socket.SOL_SOCKET, _socket.SO_REUSEADDR, reuse_addr)
    try:
        sock.bind(address)
    except _socket.error:
        ex = sys.exc_info()[1]
        strerror = getattr(ex, 'strerror', None)
        if strerror is not None:
            ex.strerror = strerror + ': ' + repr(address)
        raise
    sock.listen(backlog)
    sock.setblocking(0)
    return sock