Questions asking for code must demonstrate a minimal understanding of the problem being solved. Include attempted solutions, why they didn't work, and the expected results. See also: Stack Overflow question checklist
Closed 10 years ago.
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快速浏览一下 Firebug 表明并验证了,是的,它们实际上确实使用了长轮询。
A quick look at firebug suggests and verifies that yes, they do in fact use long polling.