keep-alive was part of the HTTP spec.
HTTP/0.9 - no keep-alive supported. (also no longer a supported HTTP
version in Jetty 9+)
HTTP/1.0 - default is no-keep-alive (close connection after each request),
User-agent can use request header "Connection: keep-alive" to request
keep-alive.
HTTP/1.1 - default is persistent connections ("keep-alive" is no longer a
term used in HTTP). User-agent can request no persistent connections using
"Connection: close". (A User-agent request header of "Connection:
keep-alive" has no meaning in this version)
HTTP/2 - default is persistent connections.
In all of the above behaviors, the specs are clear that the Server can
close the connection for its own reasons, even it the client expects the
connection to persist.
The idea of a server side configuration for connection "keep-alive" really
doesn't makes sense in any version of HTTP ... with a server that honors
the HTTP spec properly.
If the switch exists to enable "keep-alive", then it has no meaning in
HTTP/1.1 and HTTP/2 (this is default behavior). To enable "keep-alive" in
HTTP/1.0 requires the user-agent to send the "Connection: keep-alive"
header (server cannot force this).
If the switch exists to disable "keep-alive", then it has no need in
HTTP/1.1 (just add the "Connection: close" header to your responses, in a
filter or rewrite rule if you want). HTTP/2 cannot disable it, and
HTTP/1.0 is already behaving the way you want.
So, in short, if you want persistent connections, use HTTP/1.1 (or HTTP/2),
don't specify "Connection: close" (on client request headers or server
response headers), and don't do anything that violates the HTTP spec (as
that will be an error that closes the connection).
- Joakim
Joakim Erdfelt / [email protected]
On Thu, Aug 3, 2017 at 10:06 PM, anurag gupta <[email protected]>
wrote:
> Is there a possibility to configure keep-alive on jetty ?
>
> --
> Regards
> Anurag
>
> _______________________________________________
> jetty-users mailing list
> [email protected]
> To change your delivery options, retrieve your password, or unsubscribe
> from this list, visit
> https://dev.eclipse.org/mailman/listinfo/jetty-users
>
_______________________________________________
jetty-users mailing list
[email protected]
To change your delivery options, retrieve your password, or unsubscribe from
this list, visit
https://dev.eclipse.org/mailman/listinfo/jetty-users
