--add_module for filters?

[Maxim Dounin]

Hello!

On Fri, Oct 03, 2008 at 10:18:44PM -0700, Brian Moran wrote:

> I'm trying to write a bare-bones body and header filter (just prints a  
> debugging message for headers and the body), and found that when I put  
> added it to the configuration with the --add-module configure directive,  
> it was placed BEFORE all of the filters in the load order (especially  
> the write filter). This meant that the http_write filter was called  
> before my filter, and my filter was never getting called (http_write  
> emits the output, assuming it's at the 'top' of the chain).
>
> Moving my module to the bottom of the list,  after the  
> http_not_modified_filter_module in the objs/ngx_modules.c file, I was  
> able to get it to work as expected.
>
> Besides editing objs/ngx_modules.c to manually place my module in the  
> correct order, is there any way to add in a non-standard filter into the  
> correct order in nginx's configure command?

In your module config file write something like this:

HTTP_AUX_FILTER_MODULES="$HTTP_AUX_FILTER_MODULES ngx_http_my_filter_module"

You are probably adding it to $HTTP_MODULES instead, which is 
wrong for filter modules.

Maxim Dounin