轮询服务器与AJAX [英] polling the server with ajax

问题描述

我建立一个网站，有一个系统，用户可以将消息发送给对方。我想这样，当一个登录的用户接收到的消息，他会得到他的屏幕上的一些更新告诉他。

I am building a website that has a system where users can send messages to each other. I would like it so that when a logged in user received a message, he would get some update on his screen telling him that.

这些消息并不必须是实时的，所以我不认为我想要把彗星或者剑圣之类的东西。相反，我会很高兴，只是轮询服务器每分钟左右，然后等待更新。

These messages do not have to be in realtime, so I do not think I want to push with comet or juggernaut or anything like that. Instead, I would be happy to just poll the server every minute or so and listen for updates.

我是新来的JavaScript，我想知道如果有一个漂亮的/正确的方式来做到这一点。

I am new to javascript, and I am wondering if there is a slick/right way to do this.

推荐答案

原型有一个 periodicalUpdater ，这将是我认为的不二之选。记录在案的例子：

Prototype has a periodicalUpdater, which would be the obvious choice in my opinion. Documented example:

new Ajax.PeriodicalUpdater('items', '/items', {
  method: 'get', frequency: 3, decay: 2
});

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