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javascript - 弱问下嵌套在页面内的IM是怎么实现的？比如人人网右下角的。

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Release： 2016-06-06 20:49:51
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是定时ajax获取么？

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是定时ajax获取么？

long polling，或者叫做comet，就是用长连接挂在那里，这样在有消息的时候可以立刻返回；然后再建立一个新的长连接。

ajax定时获取可以实现，更好的方案是使用ajax长轮询，具体请自行google之

xmpp + conversejs

  1. comet长连接
  2. 高级浏览器websockets
  3. ajax轮询，实时性要求不高的情况时。
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javascript php web
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