[JIRA] Created: (SSPCPP-502) Apache 2.4 post_read hook isn't run on subrequests, breaks module

[Scott Cantor (JIRA)]

Apache 2.4 post_read hook isn't run on subrequests, breaks module
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                 Key: SSPCPP-502
                 URL: https://issues.shibboleth.net/jira/browse/SSPCPP-502
             Project: Shibboleth SP - C++
          Issue Type: Bug
          Components: Web Server Modules
    Affects Versions: 2.5.0
            Reporter: Scott Cantor
            Assignee: Scott Cantor
            Priority: Critical
             Fix For: 2.5.1


The 2.4 module support relies on the post_read hook to initialize the module request_config structure and the ShibTargetApache shim object, which is then reused across all the various hooks.

When a request for a directory URL is sent, the server internally generates a subrequest to the default index.html page, and the request_config is no longer present, but the post_read hook never runs.

Testing suggests that check_user still runs, so we need to:

- fix the 2.4 "base" authz hook to handle the uninitialized case less fatally
- make sure the check_user hook can create the objects needed itself without relying on the post_read hook

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