It's request_rec which represents http Request not Response. look into this data structure for the content-type field.
________________________________ From: Eric Covener <cove...@gmail.com> To: modules-dev@httpd.apache.org; Nce Rt <nce...@yahoo.com> Sent: Wednesday, March 6, 2013 2:50 PM Subject: Re: some key fields of request_rec are null On Wed, Mar 6, 2013 at 4:21 PM, Nce Rt <nce...@yahoo.com> wrote: > > > A custom handler which is registered to run APR_HOOK_FIRST has these fields > null when processing http request: > r->content_type, r->parsed_uri.scheme r->content_type is not related to any request header -- it's the response content type. It won't be set early, before a response is generated.
