RFR: 8349910: Implement HTTP/3 for the HTTP Client API

[Artur Barashev]

On Tue, 22 Apr 2025 18:59:57 GMT, Artur Barashev <abarashev at openjdk.org> wrote:

>> Hi,
>> 
>> Please find here a PR for the implementation of JEP [JDK-8291976: HTTP/3 for the HTTP Client API](https://bugs.openjdk.org/browse/JDK-8291976).
>> 
>> The CSR can be viewed at [JDK-8350588: Implement 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.
>
> test/jdk/java/net/httpclient/http3/H3QuicTLSConnection.java line 96:
> 
>> 94:         //System.setProperty("javax.net.ssl.trustStore", KEYSTORE);
>> 95:         //System.setProperty("javax.net.ssl.trustStorePassword", PASSWORD);
>> 96:         SSLContext context = new SimpleSSLContext().get();
> 
> FYI: We are moving away from using keystore files to generating keystores on the fly as needed. `SimpleSSLContext` is using a keystore file.

`MD5NotAllowedInTLS13CertificateSignature` contains an example.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24751#discussion_r2054710098