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From Eric Covener <>
Subject Re: [users@httpd] Health check expressions
Date Thu, 13 Feb 2020 12:16:19 GMT
On Wed, Feb 5, 2020 at 6:45 AM Antony Stone
<> wrote:
> Hi.
> I'm using Apache as a load-balancing proxy, following
> and
> as guides to
> setting it up.
> I've got it working fine when I use %{REQUEST_STATUS} in the health check
> expression, but I'd like to use the content type of the returned header for
> the health check.
> Following the "expression" link from the hcheck page and looking at
> I think I should be able to use
> %{CONTENT_TYPE} but this always returns status HcFl.
> Is there a list of what I can use in ProxyHCExpr definitions somewhere, other
> than the two examples (request status, and body content) shown on the above
> page?
> Any idea how to check the content-type of the returned response?

Have you tried reading the value of the Content-Type response header
instead of this built-in var?

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