在Socket.IO中，'heartbeat'是一个可以用来触发其他动作的事件吗？

This exact code doesn't work, but, I was hoping something like it was:

这个确切的代码不起作用，但是，我希望它是这样的：

io.sockets.on('connection', function(socket) {
    socket.on('heartbeat', function() {
        // Do something here...
    });
});

Is something like this possible? I mean, I know I can just make a different function that triggers every, say, 15 seconds using a setInterval:

这样的事情可能吗？我的意思是，我知道我可以创建一个不同的函数，使用setInterval触发每个，比如15秒：

io.sockets.on('connection', function(socket) {
    setInterval(function() {
        // Do something
    },15000);
});

But since the heartbeat is already running at this interval, why not make use of it?

但由于心跳已经在这个间隔运行，为什么不利用它呢？

In any case, any insight would be greatly appreciated.

无论如何，我们将非常感谢任何见解。

1 个解决方案

#1

I think that I see what you're trying to do. There are a few exposed events that you can check here - list of Socket.io events - but there is no "heartbeat" event that you can tap into to fire at a set interval.

我想我看到你要做的事情。您可以在这里查看一些暴露事件 - Socket.io事件列表 - 但是没有“心跳”事件可以在设定的时间间隔内触发。

You're on the right track with the second piece of code -

你在第二段代码的正确轨道上 -

setInterval(function() {
    socket.emit('heartbeat', someData);
}, 5000);

And on the client side -

在客户端 -

socket.on('heartbeat', function(data) {
    console.log(data);
})

#1