annotate misc/README @ 7702:7015f26aef90

Cache: ignore stale-if-error for 4xx and 5xx codes. Previously the stale-if-error extension of the Cache-Control upstream header triggered the return of a stale response for all error conditions that can be specified in the proxy_cache_use_stale directive. The list of these errors includes both network/timeout/format errors, as well as some HTTP codes like 503, 504, 403, 429 etc. The latter prevented a cache entry from being updated by a response with any of these HTTP codes during the stale-if-error period. Now stale-if-error only works for network/timeout/format errors and ignores the upstream HTTP code. The return of a stale response for certain HTTP codes is still possible using the proxy_cache_use_stale directive. This change also applies to the stale-while-revalidate extension of the Cache-Control header, which triggers stale-if-error if it is missing. Reported at http://mailman.nginx.org/pipermail/nginx/2020-July/059723.html.
author Roman Arutyunyan <arut@nginx.com>
date Wed, 29 Jul 2020 13:28:04 +0300
parents 001beb963d86
children 985b0bda403c
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2 make -f misc/GNUmakefile release
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4 the required tools:
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5 *) xsltproc to build CHANGES,
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001beb963d86 Documented the switch from java XSLScript to xslscript.pl.
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6 *) xslscript.pl ( http://hg.nginx.org/xslscript ) to build XSLTs
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7 from XSLScript sources.
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10 make -f misc/GNUmakefile icons
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12 the required tool:
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13 *) netpbm to create Win32 icons from xpm sources.