[PATCH 1 of 3] HTTP: add support for trailers in HTTP responses

[Maxim Dounin]

Hello!

On Wed, Apr 05, 2017 at 05:33:45AM -0700, Piotr Sikora via nginx-devel wrote:

> Hey,
> 
> > # HG changeset patch
> > # User Piotr Sikora <piotrsikora at google.com>
> > # Date 1490351854 25200
> > #      Fri Mar 24 03:37:34 2017 -0700
> > # Node ID 8af81a0d66c0f69bcf501edcf10deed4c8f7fbd4
> > # Parent  39ff6939266e913e8bfd400e60f9520e70725a4d
> > HTTP: add support for trailers in HTTP responses.
> >
> > Example:
> >
> >    ngx_table_elt_t  *h;
> >
> >    h = ngx_list_push(&r->headers_out.trailers);
> >    if (h == NULL) {
> >        return NGX_ERROR;
> >    }
> >
> >    ngx_str_set(&h->key, "Fun");
> >    ngx_str_set(&h->value, "with trailers");
> >    h->hash = ngx_hash_key_lc(h->key.data, h->key.len);
> >
> > The code above adds "Fun: with trailers" trailer to the response to
> > the request with "TE: trailers" header (which indicates support for
> > trailers).
> >
> > Modules that want to emit trailers must set r->expect_trailers = 1,
> > otherwise they are going to be ignored.
> >
> > This change also adds $sent_trailer_* variables.
> >
> > Signed-off-by: Piotr Sikora <piotrsikora at google.com>
> 
> Ping.

I don't currently have time to look into it, sorry.  I'll look 
once time permits.

Meanwhile, you may improve things by providing links to previous 
versions of the patch and describing changes made since then.

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