Mercurial > hg > nginx-quic
view src/event/ngx_event_posted.h @ 5935:1573fc7875fa
Cache: send conditional requests only for cached 200/206 responses.
RFC7232 says:
The 304 (Not Modified) status code indicates that a conditional GET
or HEAD request has been received and would have resulted in a 200
(OK) response if it were not for the fact that the condition
evaluated to false.
which means that there is no reason to send requests with "If-None-Match"
and/or "If-Modified-Since" headers for responses cached with other status
codes.
Also, sending conditional requests for responses cached with other status
codes could result in a strange behavior, e.g. upstream server returning
304 Not Modified for cached 404 Not Found responses, etc.
Signed-off-by: Piotr Sikora <piotr@cloudflare.com>
author | Piotr Sikora <piotr@cloudflare.com> |
---|---|
date | Wed, 26 Nov 2014 18:35:37 -0800 |
parents | 3f5f0ab59b35 |
children | 3d4730eada9c |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_EVENT_POSTED_H_INCLUDED_ #define _NGX_EVENT_POSTED_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #define ngx_post_event(ev, q) \ \ if (!ev->posted) { \ ev->posted = 1; \ ngx_queue_insert_tail(q, &ev->queue); \ \ ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "post event %p", ev); \ \ } else { \ ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, \ "update posted event %p", ev); \ } #define ngx_delete_posted_event(ev) \ \ ev->posted = 0; \ ngx_queue_remove(&ev->queue); \ \ ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, \ "delete posted event %p", ev); void ngx_event_process_posted(ngx_cycle_t *cycle, ngx_queue_t *posted); extern ngx_queue_t ngx_posted_accept_events; extern ngx_queue_t ngx_posted_events; #endif /* _NGX_EVENT_POSTED_H_INCLUDED_ */