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annotate src/event/ngx_event_posted.h @ 5935:1573fc7875fa

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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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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
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3 * Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
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4 * Copyright (C) Nginx, Inc.
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5 */
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8 #ifndef _NGX_EVENT_POSTED_H_INCLUDED_
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9 #define _NGX_EVENT_POSTED_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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14 #include <ngx_event.h>
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17 #define ngx_post_event(ev, q) \
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18 \
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19 if (!ev->posted) { \
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20 ev->posted = 1; \
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21 ngx_queue_insert_tail(q, &ev->queue); \
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22 \
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23 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, "post event %p", ev); \
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24 \
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25 } else { \
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26 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, \
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27 "update posted event %p", ev); \
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28 }
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31 #define ngx_delete_posted_event(ev) \
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32 \
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33 ev->posted = 0; \
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34 ngx_queue_remove(&ev->queue); \
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35 \
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36 ngx_log_debug1(NGX_LOG_DEBUG_CORE, ev->log, 0, \
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37 "delete posted event %p", ev);
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41 void ngx_event_process_posted(ngx_cycle_t *cycle, ngx_queue_t *posted);
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44 extern ngx_queue_t ngx_posted_accept_events;
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45 extern ngx_queue_t ngx_posted_events;
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48 #endif /* _NGX_EVENT_POSTED_H_INCLUDED_ */