commit e155ab54ec5ad4c31937f4d7de8b502e91468e43
author Nan Zhou <nanzhoumails@gmail.com> Fri Jun 10 00:03:45 2022 +0000
committer Ed Tanous <ed@tanous.net> Mon Aug 01 23:33:39 2022 +0000
tree 711c0ba67ce638b09f424a4b5101508e1a152568
parent 85e6471b5e526c2f752623a01c14c09c7cf8c9cd

query: implement generic $select

This commits implement the generic handler for the $select query in
the Redfish Spec, section 7.3.3.

$select takes a comma separated list of properties, and only these
properties will be returned in the response.

As a first iteration, this commits doesn't handle $select combined with
$expand. It returns an unimplemented error in that case. I am currently
working with DMTF and getting their clarification. See this issue for
details: https://github.com/DMTF/Redfish/issues/5058.

It also leaves other TODOs in the comment of |processSelect|. Today,
$select is put behind the insecure-query flag.

Tested:
0. No $select is performed when the flag is disabled.
1. The core codes are just JSON manipulation. Tested in unit tests.
2. On hardware,
URL: /redfish/v1/Systems/system/ResetActionInfo?$expand=.&$select=Id
400 Bad Request

URL: /redfish/v1/Systems/system?$select=ProcessorSummary/Status
{
    "@odata.id": "/redfish/v1/Systems/system",
    "@odata.type": "#ComputerSystem.v1_16_0.ComputerSystem",
    "ProcessorSummary": {
        "Status": {
            "Health": "OK",
            "HealthRollup": "OK",
            "State": "Disabled"
        }
    }
}

Signed-off-by: Nan Zhou <nanzhoumails@gmail.com>
Change-Id: I5c570e3a0a37cbab160aafb8107ff8a5cc99a6c1