Subrequest without returning to nginx

[Alfred Sawaya]

mirror and post_action both return to nginx to complete the subrequest.

njs also does an event-driven subrequest (ie gives back a promise and
set a callback), so it also returns to nginx to complete the subrequest.




On 04/05/2021 16:32, Dipl. Ing. Sergey Brester wrote:
>
> Hi,
>
> see how the directive mirror
> <https://nginx.org/en/docs/http/ngx_http_mirror_module.html> or
> |post_action| doing this.
>
> Also take a look at njs <http://nginx.org/en/docs/njs/reference.html>,
> how it can make a detached subrequest.
>
> Regards,
> Serg.
>
> 04.05.2021 16:11, Alfred Sawaya wrote:
>
>> Hello,
>>
>>
>> I am currently converting an Apache module to Nginx. This module uses
>> subrequests and needs (for now) to execute the subrequest without
>> unwinding the stack (ie without returning to nginx).
>>
>> I tried to call ngx_http_run_posted_requests by hand, but it does not
>> work as the upstream socket needs to get polled some time.
>>
>>
>> So I wonder, is there any way to do this ?
>>
>>
>> Of course I know that I shouldn't do it like this, but the current
>> module is not reentrant and poorly architectured. I will eventually
>> refactor it but later.
>>
>>
>> Thanks,
>>
>>
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