Buffers Chain

[Paulo Silva]

Hi,

On Fri, May 23, 2014 at 12:58 PM, Maxim Dounin <mdounin at mdounin.ru> wrote:
> Hello!
>
> On Fri, May 23, 2014 at 11:57:20AM +0100, Paulo Silva wrote:
>
>> there is other option than modify the auto/modules file?
>>
>> According to my goal (capture the full request response body) I would
>> say that my module must run right before the postpone.
>
> Before the postpone filter you'll get subrequest bodies in your
> filter, which is probably not what you want (the postpone filter
> is to glue subrequest together, correctly ordered).
>
>> Am I supposed to modify the auto/modules like follows?
>>
>> if [ $HTTP_POSTPONE = YES ]; then
>>     HTTP_FILTER_MODULES="$HTTP_FILTER_MODULES $HTTP_POSTPONE_FILTER_MODULE"
>>     HTTP_SRCS="$HTTP_SRCS $HTTP_POSTPONE_FILTER_SRCS"
>> fi
>>
>> # insert my module here!
>>
>> if [ $HTTP_SSI = YES ]; then
>>     have=NGX_HTTP_SSI . auto/have
>>     HTTP_FILTER_MODULES="$HTTP_FILTER_MODULES $HTTP_SSI_FILTER_MODULE"
>>     HTTP_DEPS="$HTTP_DEPS $HTTP_SSI_DEPS"
>>     HTTP_SRCS="$HTTP_SRCS $HTTP_SSI_SRCS"
>> fi
>>
>>
>> I did check my modules config file and I did realize that it is
>> "queued" as HTTP_AUX_FILTER_MODULES. There are different queues for
>> core modules and addons?
>
> The HTTP_AUX_FILTER_MODULES is a generic queue, and it's the
> only one currently officially supported for 3rd party modules.
>
> If you want your filter to be called right before/after postpone
> filter, it should be relatively safe to put it into the
> HTTP_POSTPONE_FILTER_MODULE variable though (and may be with some
> additional checks to make sure the postpone filter is enabled, or
> just a code to enable it unconditionally).
>

And this is also valid when compiling nginx with the --add-module flag?
How does config file look like?

My knowledge is restricted to Emiller's Guide To Nginx Module
Development (http://www.evanmiller.org/nginx-modules-guide.html) and a
few debugging hours.

Thanks a bunch,

> --
> Maxim Dounin
> http://nginx.org/
>
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> nginx-devel at nginx.org
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-- 
Paulo A. Silva
http://tech.pauloasilva.com
http://linkedin.com/in/devpauloasilva/