Hello!

On Fri, Feb 14, 2014 at 04:39:23PM -0500, atarob wrote:

> Creating a module, I want to read in from config desired http header fields.
> Then, during config still, I want to get the struct offset for the fields
> that have dedicated pointers in the header_in struct. It seems that when I
> access headers_in_hash from the main config, it is uninitialized. I can see
> in the code that there is
>
> ngx_http_init_headers_in_hash(ngx_conf_t *cf, ngx_http_core_main_conf_t
> *cmcf)
>
> in ngx_http.c. It seems to be called when the main conf is being generated
> though I am not certain yet.
>
> Where and when exactly is headers_in_hash initialized? If I wanted to read
> from it during ngx_http_X_merge_loc_conf(), what would I need to do? Or am
> I supposed to do it at some point later?

The cmcf->headers_in_hash is expected to be initialized during
runtime. As of now, it will be initialized before
postconfiguration hooks, but I wouldn't recommend relaying on
this.

I also won't recommend using cmcf->headers_in_hash in your own
module at all, unless you have good reasons to. It's not really a
part of the API, it's an internal entity which http core uses to
do it's work.

--
Maxim Dounin
http://nginx.org/

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