Mercurial > hg > nginx
comparison src/http/ngx_http_request.h @ 9306:e46e1ea89ccd
Upstream: $upstream_cache_age variable.
The variable reflects response age, including the time spent in the
cache and the upstream response age as obtained from the "Age" header.
If the response wasn't cached, the variable reflects the "Age" header
of the upstream response.
If the intended use case is to cache responses as per HTTP/1.1 caching
model, the $upstream_cache_age variable can be used to provide the "Age"
header with the "add_header" directive, such as:
add_header Age $upstream_cache_age;
This now removes the "Age" header if it was present.
Further, the "expires" directives now removes the "Age" header if it
was present in the response, as the "expires" directive assumes zero
age when it adds "Expires" and "Cache-Control" headers.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Thu, 18 Jul 2024 19:39:45 +0300 |
parents | 199dc0d6b05b |
children | 3c71158f5a34 |
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9305:8cdab3d89c44 | 9306:e46e1ea89ccd |
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276 ngx_table_elt_t *expires; | 276 ngx_table_elt_t *expires; |
277 ngx_table_elt_t *etag; | 277 ngx_table_elt_t *etag; |
278 | 278 |
279 ngx_table_elt_t *cache_control; | 279 ngx_table_elt_t *cache_control; |
280 ngx_table_elt_t *link; | 280 ngx_table_elt_t *link; |
281 ngx_table_elt_t *age; | |
281 | 282 |
282 ngx_str_t *override_charset; | 283 ngx_str_t *override_charset; |
283 | 284 |
284 size_t content_type_len; | 285 size_t content_type_len; |
285 ngx_str_t content_type; | 286 ngx_str_t content_type; |