RFR: 8349910: Implement JEP 517: HTTP/3 for the HTTP Client API [v16]

[Daniel Jeliński]

On Thu, 4 Sep 2025 14:06:52 GMT, Daniel Fuchs <dfuchs at openjdk.org> wrote:

>> Hi,
>> 
>> Please find here a PR for the implementation of [JEP 517: HTTP/3 for the HTTP Client API](https://openjdk.org/jeps/517).
>> 
>> The CSR can be viewed at [JDK-8350588: Implement JEP 517: HTTP/3 for the HTTP Client API](https://bugs.openjdk.org/browse/JDK-8350588)
>> 
>> This JEP proposes to enhance the HttpClient implementation to support HTTP/3.
>> It adds a non-exposed / non-exported internal implementation of the QUIC protocol based on DatagramChannel and the SunJSSE SSLContext provider.
>
> Daniel Fuchs has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 653 commits:
> 
>  - merge latest changes from master branch
>  - http3: fix at since
>  - merge latest http3 changes
>  - Remove unused variables
>  - Simplify control flow
>  - Remove unnecessary instanceof checks
>  - Use IntFunction for header generator
>  - merge latest changes from master branch
>  - http3: minor cleanup
>  - http3: cleanup - QuicConnectionImpl::maxInitialTimer should be volatile
>  - ... and 643 more: https://git.openjdk.org/jdk/compare/a40afdd0...3925afda

Marked as reviewed by djelinski (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/24751#pullrequestreview-3185555986