如何从NodeJS服务器端在客户端浏览器上调用javascript函数？

问题描述：

我正在NodeJS服务器端进行编程，我希望在客户端浏览器端调用javascript函数。希望我可以不时地从服务器端在客户端浏览器端调用函数，就好像我只是在服务器端调用该函数一样。

I'm programming on the NodeJS server side, I wish to call a javascript function on the client browser side. Hopefully I can call functions every now and then on the client browser side from the server side as if I an just calling the function on the server side.

是否存在某种形式

答

我签出了Socket.IO，但最终使用了Faye。 Faye可能比您想要的功能多一些，但是它很容易设置和使用。我发现它比Socket.IO更直观。并不是说Socket.IO看起来很艰难，但Faye看起来更轻松。

I checked out Socket.IO but ended up using Faye instead. Faye is probably a little more functionality than you want, but it's so easy to setup and use. I found it more intuitive than Socket.IO. Not that Socket.IO looks tough, but Faye just looked easier.

这里是网站：

http://faye.jcoglan.com/

也有一个google用户组，作者已经回答了我的一些查询。

There is a google users group too and the author has responded to a couple of my inquiries.

您需要的是以下代码：

节点端：

var faye = require('faye');
var faye_server = new faye.NodeAdapter({mount: '/faye', timeout: 120});

console.log('Firing up faye server. . . ');
faye_server.listen(8089);

//send message out every 1 second
setInterval( function()
{   
    var currentTime_secsSinceEpoch = new Date().getTime() / 1000;

    faye_server.getClient().publish('/heartbeat', 
    {
        pageName: 'app.js',
        timeMessageSent_secs_since_epoch: currentTime_secsSinceEpoch,
        iFrame1CycleCount: iFrame1CycleCount

    });
}, 1000);

浏览器侧：

<script type='text/javascript'>
//create faye client
var faye_client = new Faye.Client('http://127.0.0.1:8089/faye');

var faye_message_subscription = faye_client.subscribe('/heartbeat', function(message)
{   
    //record the time message was received
    var receiveTime_secSinceEpoch = new Date().getTime() / 1000;

    console.log("Got heartbeat at " + receiveTime_secsSinceEpoch + "with a delay of " +
        receiveTime_secsSinceEpoch - message.currentTime_secsSinceEpoch + " secs");
    //Do something else important here!!
}
</script>

就是这样！现在，每当您的服务器发送心跳消息时，您的网页就会调用我们指定的函数，并向控制台吐出一条消息。

That's it! Now every time your server sends the 'heartbeat' message, your webpage will call the function we specified and spit out a message to the console. Dead simple.

Faye可能还需要使用许多其他很酷的功能，但这是我想要的。

Faye has a lot of other cool functionality you may want to use, but this is mostly what you will want I think.

您可以附加Faye真的很容易在节点*问快递服务器，这使得它可以与Web服务器一起很好地工作。

You can attach Faye to an express server in node too really easily which makes it work really well with a webserver.

如何从NodeJS服务器端在客户端浏览器上调用javascript函数？

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