commit b152bd8153ccd54d312f18616b7e2745decb2c62
author Piotr Sikora <piotrsikora@google.com> Fri Mar 24 03:37:34 2017 -0700
committer Piotr Sikora <piotrsikora@google.com> Fri Mar 24 03:37:34 2017 -0700
tree 122dd12203f4dcf5a6c2438fe13f31af8d8bce82
parent e7cc3432f80d83e47a29a9fc20f057e75200b050

Added 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.

Modules that want to emit trailers must set r->expect_trailers = 1
in header filter, otherwise they might not be emitted for HTTP/1.1
responses that aren't already chunked.

This change also adds $sent_trailer_* variables.

Signed-off-by: Piotr Sikora <piotrsikora@google.com>