Published Apr 03, 2024
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The Keep-Alive general header allows the sender to hint about how the connection may be used to set a timeout and a maximum amount of requests.
Keep-Alive: parameters
A comma-separated list of parameters, each consisting of an identifier and a value separated by the equal sign ('=').
The following identifiers are possible:
timeout: An integer that is the time in seconds that the host will allow an idle connection to remain open before
it is closed. A connection is idle if no data is sent or received by a host. A host may keep an idle connection open
for longer than timeout seconds, but the host should attempt to retain a connection for at least timeout seconds.max: An integer that is the maximum number of requests that can be sent on this connection before closing it.
Unless 0, this value is ignored for non-pipelined connections as another request will be sent in the next response.
An HTTP pipeline can use it to limit the pipelining.A response containing a Keep-Alive header
HTTP/1.1 200 OK
Connection: Keep-Alive
Content-Encoding: gzip
Content-Type: text/html; charset=utf-8
Date: Thu, 11 Aug 2016 15:23:13 GMT
Keep-Alive: timeout=5, max=1000
Last-Modified: Mon, 25 Jul 2016 04:32:39 GMT
Server: Apache
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