annotate auto/headers @ 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 d620f497c50f
children
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42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
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42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
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2 # Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
Maxim Konovalov <maxim@nginx.com>
parents: 2624
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3 # Copyright (C) Nginx, Inc.
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42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
Igor Sysoev <igor@sysoev.ru>
parents: 253
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4
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b6793bc5034b nginx-0.0.2-2004-02-09-10:46:43 import
Igor Sysoev <igor@sysoev.ru>
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ceef364208c8 ngx_fs_bsize()
Igor Sysoev <igor@sysoev.ru>
parents: 1954
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6 ngx_include="unistd.h"; . auto/include
ceef364208c8 ngx_fs_bsize()
Igor Sysoev <igor@sysoev.ru>
parents: 1954
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7 ngx_include="inttypes.h"; . auto/include
ceef364208c8 ngx_fs_bsize()
Igor Sysoev <igor@sysoev.ru>
parents: 1954
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8 ngx_include="limits.h"; . auto/include
ceef364208c8 ngx_fs_bsize()
Igor Sysoev <igor@sysoev.ru>
parents: 1954
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9 ngx_include="sys/filio.h"; . auto/include
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418c9f97bd01 fix FreeBSD before 7 building, broken in r2616
Igor Sysoev <igor@sysoev.ru>
parents: 2615
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10 ngx_include="sys/param.h"; . auto/include
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ceef364208c8 ngx_fs_bsize()
Igor Sysoev <igor@sysoev.ru>
parents: 1954
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11 ngx_include="sys/mount.h"; . auto/include
ceef364208c8 ngx_fs_bsize()
Igor Sysoev <igor@sysoev.ru>
parents: 1954
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12 ngx_include="sys/statvfs.h"; . auto/include
ceef364208c8 ngx_fs_bsize()
Igor Sysoev <igor@sysoev.ru>
parents: 1954
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13 ngx_include="crypt.h"; . auto/include