RFR: 8349910: Implement JEP 517: HTTP/3 for the HTTP Client API [v15]

[Artur Barashev]

On Tue, 26 Aug 2025 17:19:41 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 633 commits:
> 
>  - merge latest changes from master branch
>  - http3: anticipate fix for JDK-8366110
>  - http3: extend grace delay for HttpClient GC in InvalidInputStreamSubscriptionRequest.java
>  - Artur's review: reorder the methods
>  - Artur's review: rename to chooseQuicServerAlias and chooseQuicClientAlias
>  - merge latest changes from master branch
>  - http3: minor code cleanup
>  - http3: HeadersLowerCaseTest.java should close the clients it creates
>  - http3: add missing copyright in Http3ConnectionAccess and make the class final
>  - http3: improved test coverage for ImmutableSSLSession
>  - ... and 623 more: https://git.openjdk.org/jdk/compare/caaef3a0...976561a5

SSL code looks good. Thanks for making the requested changes! I didn't review the non-SSL code.

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Marked as reviewed by abarashev (Committer).

PR Review: https://git.openjdk.org/jdk/pull/24751#pullrequestreview-3157037811