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diff src/http/ngx_http_request.h @ 7006:9552758a786e

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Background subrequests for cache updates. Previously, cache background update might not work as expected, making client wait for it to complete before receiving the final part of a stale response. This could happen if the response could not be sent to the client socket in one filter chain call. Now background cache update is done in a background subrequest. This type of subrequest does not block any other subrequests or the main request.
author Roman Arutyunyan <arut@nginx.com>
date Thu, 25 May 2017 15:57:59 +0300
parents 8801ff7d58e1
children 1b068a4e82d8
line wrap: on
line diff
--- a/src/http/ngx_http_request.h
+++ b/src/http/ngx_http_request.h
@@ -64,6 +64,7 @@
 #define NGX_HTTP_SUBREQUEST_IN_MEMORY      2
 #define NGX_HTTP_SUBREQUEST_WAITED         4
 #define NGX_HTTP_SUBREQUEST_CLONE          8
+#define NGX_HTTP_SUBREQUEST_BACKGROUND     16
 
 #define NGX_HTTP_LOG_UNSAFE                1
 
@@ -486,7 +487,6 @@ struct ngx_http_request_s {
 
 #if (NGX_HTTP_CACHE)
     unsigned                          cached:1;
-    unsigned                          cache_updater:1;
 #endif
 
 #if (NGX_HTTP_GZIP)
@@ -543,6 +543,7 @@ struct ngx_http_request_s {
     unsigned                          stat_writing:1;
     unsigned                          stat_processing:1;
 
+    unsigned                          background:1;
     unsigned                          health_check:1;
 
     /* used to parse HTTP headers */