Mercurial > hg > nginx-quic
annotate src/core/ngx_sha1.h @ 4385:70ba81827472
Cache locks initial implementation.
New directives: proxy_cache_lock on/off, proxy_cache_lock_timeout. With
proxy_cache_lock set to on, only one request will be allowed to go to
upstream for a particular cache item. Others will wait for a response
to appear in cache (or cache lock released) up to proxy_cache_lock_timeout.
Waiting requests will recheck if they have cached response ready (or are
allowed to run) every 500ms.
Note: we intentionally don't intercept NGX_DECLINED possibly returned by
ngx_http_file_cache_read(). This needs more work (possibly safe, but needs
further investigation). Anyway, it's exceptional situation.
Note: probably there should be a way to disable caching of responses
if there is already one request fetching resource to cache (without waiting
at all). Two possible ways include another cache lock option ("no_cache")
or using proxy_no_cache with some supplied variable.
Note: probably there should be a way to lock updating requests as well. For
now "proxy_cache_use_stale updating" is available.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Mon, 26 Dec 2011 11:15:23 +0000 |
parents | 27d4ed42e49d |
children | d620f497c50f |
rev | line source |
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1573 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 */ | |
5 | |
6 | |
7 #ifndef _NGX_SHA1_H_INCLUDED_ | |
8 #define _NGX_SHA1_H_INCLUDED_ | |
9 | |
10 | |
11 #include <ngx_config.h> | |
12 #include <ngx_core.h> | |
13 | |
14 | |
15 #if (NGX_HAVE_OPENSSL_SHA1_H) | |
16 #include <openssl/sha.h> | |
17 #else | |
18 #include <sha.h> | |
19 #endif | |
20 | |
21 | |
22 typedef SHA_CTX ngx_sha1_t; | |
23 | |
24 | |
1598 | 25 #define ngx_sha1_init SHA1_Init |
26 #define ngx_sha1_update SHA1_Update | |
27 #define ngx_sha1_final SHA1_Final | |
1573 | 28 |
29 | |
30 #endif /* _NGX_SHA1_H_INCLUDED_ */ |