在不刷新页面的情况下，可以使用哪些技术更新包含更新内容的网页？ [关闭]

Question

We have been offered training at work for courses on what ever we want. What we are trying to achieve is the following: we have a page with stats from multiple folders/servers (we can deliver these in any format, html, txt etc). Currently it refreshes every minute with the up to date info. What we want is for the page not to refresh, but just the data within the page to change when it changes elsewhere, we want this to update when it happens (if possible) rather than every minute. An example I'd give is Facebook or Twitter updating the feed when someone posts something new

What technologies would we require for this to work? jquery? ajax? javascript? and is there a specific part of the technology that would do this that we can target the course to be about?

Any help/pointers appreciated

Answer 1

You're looking for Push technology.

The slightly dated way of simulating this is "long-polling" or Comet where (essentially) an AJAX request remains open for a long period of time (instead of constantly polling), until the server actually has a response to send.

Nowadays, you should look into websockets or a commercial product like like pusher which uses websockets to initiate communication server-side, rather than constantly polling from the client.