[1] [CITE@en[RFC 6202 - Known Issues and Best Practices for the Use of Long Polling and Streaming in Bidirectional HTTP]]
( ([TIME[2014-07-20 07:14:03 +09:00]] 版))
<http://tools.ietf.org/html/rfc6202#section-1>

[FIG(quote)[
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[2] [CITE@en[RFC 6202 - Known Issues and Best Practices for the Use of Long Polling and Streaming in Bidirectional HTTP]]
([TIME[2015-05-03 15:34:11 +09:00]] 版)
<http://tools.ietf.org/html/rfc6202>
]FIGCAPTION]

> HTTP Long Polling:  The server attempts to "hold open" (not
>       immediately reply to) each HTTP request, responding only when
>       there are events to deliver.  In this way, there is always a
>       pending request to which the server can reply for the purpose of
>       delivering events as they occur, thereby minimizing the latency in
>       message delivery.

]FIG]