utils.py 文件源码

def server_socket(host, port, backlog=10):
    """Create a TCP listening socket for a server."""
    addr = socket.getaddrinfo(host, port, socket.AF_INET, socket.SOCK_STREAM)
    if not addr:
        raise Exception("Could not translate address '%s:%s'"
                        % (host, str(port)))
    my_socket = socket.socket(addr[0][0], addr[0][1], addr[0][2])
    my_socket.setblocking(0)  # 0=non-blocking
    try:
        my_socket.bind(addr[0][4])
        my_socket.listen(backlog)
    except socket.error as e:
        if e.errno != errno.EINPROGRESS:
            raise
    return my_socket