Question

我有多个客户端向服务器发送消息。当没有超过5秒的新消息时，我试图检测到这种情况。这是我的代码（我删除了许多不相关的行）：

ERROR TypeError: Cannot assign to read only property 'list' of object '#<HTMLInputElement>'

问题是在最后一条消息（休息开始时）之后，当前时间和最后一条消息的时间之间的差异仅被检查一次，等于0秒。然后服务器似乎只是等待这行中的消息：

listen(sockfd, 5000);
time_t new_msg;
time(&new_msg);

while (true) {
    time_t current;
    time(&current);
    //if more than 5 seconds passed since the last message:
    if (difftime(current, new_msg) > 5) { 
    //do something
    }

    client = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
    if (client < 0) {
        cout << "Error on accepting" << endl;
        continue;
    }
    n = read(client, buffer, read_len - 1);
    if (n < 0) cout << "Error on reading from the socket" << endl;
    else if (n == 0) continue;

    time(&new_msg); //save time for the last message
    //if everything is ok, do something with the message
}

如何重新检查时间？或者有没有更简单的方法来检查服务器空闲多长时间？

更新

我在client = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);之前创建了以下循环：

accept

它看起来不干净，但至少有效。

Answer 1

你能试试吗？

on_message !test
in test function
Ignoring exception in on_message
Traceback (most recent call last):
  File "C:\Users\indit\AppData\Roaming\Python\Python36\site-packages\discord\client.py", line 223, in _run_event
    yield from coro(*args, **kwargs)
  File "bot.py", line 15, in on_message
    await test(author, message)
  File "bot.py", line 21, in test
    await client.send_message(message.channel, 'Hi %s, i heard you.' % author)
AttributeError: 'Client' object has no attribute 'send_message'

另一种可能性是使用fcntl(sockfd, F_SETFL, O_NONBLOCK); listen(sockfd, 5000); time_t new_msg; time(&new_msg); while (true) { time_t current; ...或select()代替poll()。

套接字：测量自上一条消息以来经过的时间

1 个答案: