Mercurial > hg > nginx
view src/http/ngx_http_config.h @ 7993:96ae8e57b3dd
Avoid sending "Connection: keep-alive" when shutting down.
When a worker process is shutting down, keepalive is not used: this is checked
before the ngx_http_set_keepalive() call in ngx_http_finalize_connection().
Yet the "Connection: keep-alive" header was still sent, even if we know that
the worker process is shutting down, potentially resulting in additional
requests being sent to the connection which is going to be closed anyway.
While clients are expected to be able to handle asynchronous close events
(see ticket #1022), it is certainly possible to send the "Connection: close"
header instead, informing the client that the connection is going to be closed
and potentially saving some unneeded work.
With this change, we additionally check for worker process shutdown just
before sending response headers, and disable keepalive accordingly.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Tue, 11 Jan 2022 02:23:49 +0300 |
parents | d620f497c50f |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_HTTP_CONFIG_H_INCLUDED_ #define _NGX_HTTP_CONFIG_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_http.h> typedef struct { void **main_conf; void **srv_conf; void **loc_conf; } ngx_http_conf_ctx_t; typedef struct { ngx_int_t (*preconfiguration)(ngx_conf_t *cf); ngx_int_t (*postconfiguration)(ngx_conf_t *cf); void *(*create_main_conf)(ngx_conf_t *cf); char *(*init_main_conf)(ngx_conf_t *cf, void *conf); void *(*create_srv_conf)(ngx_conf_t *cf); char *(*merge_srv_conf)(ngx_conf_t *cf, void *prev, void *conf); void *(*create_loc_conf)(ngx_conf_t *cf); char *(*merge_loc_conf)(ngx_conf_t *cf, void *prev, void *conf); } ngx_http_module_t; #define NGX_HTTP_MODULE 0x50545448 /* "HTTP" */ #define NGX_HTTP_MAIN_CONF 0x02000000 #define NGX_HTTP_SRV_CONF 0x04000000 #define NGX_HTTP_LOC_CONF 0x08000000 #define NGX_HTTP_UPS_CONF 0x10000000 #define NGX_HTTP_SIF_CONF 0x20000000 #define NGX_HTTP_LIF_CONF 0x40000000 #define NGX_HTTP_LMT_CONF 0x80000000 #define NGX_HTTP_MAIN_CONF_OFFSET offsetof(ngx_http_conf_ctx_t, main_conf) #define NGX_HTTP_SRV_CONF_OFFSET offsetof(ngx_http_conf_ctx_t, srv_conf) #define NGX_HTTP_LOC_CONF_OFFSET offsetof(ngx_http_conf_ctx_t, loc_conf) #define ngx_http_get_module_main_conf(r, module) \ (r)->main_conf[module.ctx_index] #define ngx_http_get_module_srv_conf(r, module) (r)->srv_conf[module.ctx_index] #define ngx_http_get_module_loc_conf(r, module) (r)->loc_conf[module.ctx_index] #define ngx_http_conf_get_module_main_conf(cf, module) \ ((ngx_http_conf_ctx_t *) cf->ctx)->main_conf[module.ctx_index] #define ngx_http_conf_get_module_srv_conf(cf, module) \ ((ngx_http_conf_ctx_t *) cf->ctx)->srv_conf[module.ctx_index] #define ngx_http_conf_get_module_loc_conf(cf, module) \ ((ngx_http_conf_ctx_t *) cf->ctx)->loc_conf[module.ctx_index] #define ngx_http_cycle_get_module_main_conf(cycle, module) \ (cycle->conf_ctx[ngx_http_module.index] ? \ ((ngx_http_conf_ctx_t *) cycle->conf_ctx[ngx_http_module.index]) \ ->main_conf[module.ctx_index]: \ NULL) #endif /* _NGX_HTTP_CONFIG_H_INCLUDED_ */