Accessing subrequest output in memory

[Eugaia]

  Hi again,

I've found the output that the module I'm trying to get this to work 
with (ngx_http_echo_module) sent the content directly to the parent 
request.  I'm not sure if this is as a result of a generic feature, or 
something that should be fixed in echo - which I'll look into.

Cheers,

Marcus.

On 15/10/2010 20:59, Eugaia wrote:
>  Hi,
>
> I'm trying to get the output of an in-memory subrequest, but I can't 
> find where the output is stored.
>
> Basically, I'm doing :
>
> ...
> ngx_uint_t flags;
> ngx_http_post_subrequest_t *psr;
> ngx_str_t location;
> ngx_str_t *url_args;
>
> psr->handler = my_callback;
> flags |= NGX_HTTP_SUBREQUEST_IN_MEMORY;
>
> ngx_http_subrequest (r, &location, url_args, &sr, psr, flags);
> ...
>
> // waiting for for subrequest to process
>
> my_callback (ngx_http_request_t *sr, void *data, ngx_int_t rc)
> {
>     ngx_http_request_t *r;
>
>     r = sr->parent;
>     ...
>     // I want to be able to access the (body) output from the 
> subrequest here
> }
>
> If the subrequest uses an upstream, I know I can access the output 
> using sr->upstream->buffer.  However, if the subrequest does not use 
> upstreams, then this won't work.  The output is not available from 
> sr->out - r->out is set to NULL at some point during the output 
> filtering.  As far as I can make out, what I need to do is find where 
> the body output ngx_chain_t * struct is saved after all the body 
> filtering has been processed, but I'm struggling to find it.
>
> Can anyone tell me where it is, or where I can find the output?
>
> Note : I don't want to remove the in-memory flag because I don't want 
> the output flushed to the client.
>
> Thanks,
>
> Marcus.