RFR: 8208693: HttpClient: Extend the request timeout's scope to cover the response body [v16]

[Jaikiran Pai]

On Wed, 3 Dec 2025 19:14:11 GMT, Volkan Yazici <vyazici at openjdk.org> wrote:

>> Currently `HttpRequest::timeout` only applies until the response headers are received. Extend its scope to also cover the consumption of the response body.
>> 
>> ### Review guidelines
>> 
>> 1. Read _"the fix"_ in `MultiExchange`
>> 2. Skim through the test server *handler* in `TimeoutResponseTestSupport`
>> 3. Review first `TimeoutResponseHeaderTest`, and then `TimeoutResponseBodyTest` (Mind the multiple `@test` blocks!)
>
> Volkan Yazici has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 42 commits:
> 
>  - Merge remote-tracking branch 'upstream/master' into respBodyTime
>  - Update JavaDocs to match the spec
>  - Move `cancelTimerOnResponseBodySubscriberTermination` to `ExchangeImpl`
>  - Exclude disallowed timer cancellations
>  - Merge remote-tracking branch 'upstream/master' into respBodyTime
>  - Cancel timer right away if response body is not permitted
>  - Configure timeout for the `WebSocketTest`
>  - Use `var`
>  - Clarify WebSocket behaviour and test it
>  - Verify no lingering response timers
>  - ... and 32 more: https://git.openjdk.org/jdk/compare/7278d2e8...5f99578a

The updated text looks good to me.

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Marked as reviewed by jpai (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/27469#pullrequestreview-3537553541