RFR: 8328638: Fallback option for POST-only OCSP requests

[Sean Mullan]

On Wed, 20 Mar 2024 19:48:52 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> See the rationale/discussion in the bug. This patch introduces the option that allows to restore pre-[JDK-8179503](https://bugs.openjdk.org/browse/JDK-8179503) behavior. The default behavior does not change. Better suggestions for flag name are welcome.
> 
> Additional testing:
>  - [x] `jdk_security` passes out of the box (includes new test config)
>  - [x]  `jdk_security` passes with flag override
>  - [x] Eyeballing `GetPostTests` amended debugging output, `GET`-s are used by default for small requests, `POST`-s are used for everything with flag override

Ideally, we should also modify the tests in `test/jdk/security/infra/java/security/cert/CertPathValidator/certification` to test OCSP with POST. I think it should be easy enough to add an additional line to each test like:

` * @run main/othervm/timeout=180 -Djava.security.debug=certpath -Dcom.sun.security.ocsp.useget=false ActalisCA OCSP`
 
 This means we would be testing real OCSP responders supported by CAs in the Java Root Program, and not just a test responder that we created.
 
 @rhalade would this change be ok with you?

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PR Comment: https://git.openjdk.org/jdk/pull/18408#issuecomment-2013663116