Mercurial > hg > nginx
diff src/http/modules/ngx_http_proxy_module.c @ 5441:43ccaf8e8728
Upstream: cache revalidation with conditional requests.
The following new directives are introduced: proxy_cache_revalidate,
fastcgi_cache_revalidate, scgi_cache_revalidate, uwsgi_cache_revalidate.
Default is off. When set to on, they enable cache revalidation using
conditional requests with If-Modified-Since for expired cache items.
As of now, no attempts are made to merge headers given in a 304 response
during cache revalidation with headers previously stored in a cache item.
Headers in a 304 response are only used to calculate new validity time
of a cache item.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 18 Nov 2013 20:48:22 +0400 |
parents | e65be17e3a3e |
children | e7b3b9855be8 |
line wrap: on
line diff
--- a/src/http/modules/ngx_http_proxy_module.c Mon Nov 11 18:49:35 2013 +0400 +++ b/src/http/modules/ngx_http_proxy_module.c Mon Nov 18 20:48:22 2013 +0400 @@ -465,6 +465,13 @@ offsetof(ngx_http_proxy_loc_conf_t, upstream.cache_lock_timeout), NULL }, + { ngx_string("proxy_cache_revalidate"), + NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, + ngx_conf_set_flag_slot, + NGX_HTTP_LOC_CONF_OFFSET, + offsetof(ngx_http_proxy_loc_conf_t, upstream.cache_revalidate), + NULL }, + #endif { ngx_string("proxy_temp_path"), @@ -622,7 +629,8 @@ { ngx_string("Keep-Alive"), ngx_string("") }, { ngx_string("Expect"), ngx_string("") }, { ngx_string("Upgrade"), ngx_string("") }, - { ngx_string("If-Modified-Since"), ngx_string("") }, + { ngx_string("If-Modified-Since"), + ngx_string("$upstream_cache_last_modified") }, { ngx_string("If-Unmodified-Since"), ngx_string("") }, { ngx_string("If-None-Match"), ngx_string("") }, { ngx_string("If-Match"), ngx_string("") }, @@ -2454,6 +2462,7 @@ conf->upstream.cache_valid = NGX_CONF_UNSET_PTR; conf->upstream.cache_lock = NGX_CONF_UNSET; conf->upstream.cache_lock_timeout = NGX_CONF_UNSET_MSEC; + conf->upstream.cache_revalidate = NGX_CONF_UNSET; #endif conf->upstream.hide_headers = NGX_CONF_UNSET_PTR; @@ -2710,6 +2719,9 @@ ngx_conf_merge_msec_value(conf->upstream.cache_lock_timeout, prev->upstream.cache_lock_timeout, 5000); + ngx_conf_merge_value(conf->upstream.cache_revalidate, + prev->upstream.cache_revalidate, 0); + #endif ngx_conf_merge_str_value(conf->method, prev->method, "");