Control: Ensure that 'HTTP Version' is the latest, if used to run the Function app

powerpipe control run azure_compliance.control.appservice_function_app_latest_http_version

powerpipe login
powerpipe control run azure_compliance.control.appservice_function_app_latest_http_version --share

with all_function_app as (
  select
    id
  from
    azure_app_service_function_app
  where
    exists (
      select
      from
        unnest(regexp_split_to_array(kind, ',')) elem
      where
        elem like 'functionapp%'
    )
    and
    exists (
      select
      from
        unnest(regexp_split_to_array(kind, ',')) elem
      where
        elem = 'linux'
    )
)
select
  a.id as resource,
  case
    when b.id is null then 'skip'
    when configuration -> 'properties' ->> 'http20Enabled' = 'true' then 'ok'
    else 'alarm'
  end as status,
  case
    when b.id is null then a.title || ' is not a linux function app.'
    when configuration -> 'properties' ->> 'http20Enabled' = 'true' then a.name || ' is using the latest HTTP version.'
    else a.name || ' not using latest HTTP version.'
  end as reason
  
  , a.resource_group as resource_group
  , sub.display_name as subscription
from
  azure_app_service_function_app as a
  left join all_function_app as b on a.id = b.id
  left join azure_subscription as sub on sub.subscription_id = a.subscription_id;