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Upstream: avoid closing client connection in edge case. If proxy_cache is enabled, and proxy_no_cache tests true, it was previously possible for the client connection to be closed after a 304. The fix is to recheck r->header_only after the final cacheability is determined, and end the request if no longer cacheable. Example configuration: proxy_cache foo; proxy_cache_bypass 1; proxy_no_cache 1; If a client sends If-None-Match, and the upstream server returns 200 with a matching ETag, no body should be returned to the client. At the start of ngx_http_upstream_send_response proxy_no_cache is not yet tested, thus cacheable is still 1 and downstream_error is set. However, by the time the downstream_error check is done in process_request, proxy_no_cache has been tested and cacheable is set to 0. The client connection is then closed, regardless of keepalive.
author Justin Li <jli.justinli@gmail.com>
date Tue, 08 Mar 2016 22:31:55 -0500
parents d620f497c50f
children
line wrap: on
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# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


# Compaq C V6.5-207

ngx_include_opt="-I"

# warnings

CFLAGS="$CFLAGS -msg_enable level6 -msg_fatal level6"

CFLAGS="$CFLAGS -msg_disable unknownmacro"
CFLAGS="$CFLAGS -msg_disable unusedincl"
CFLAGS="$CFLAGS -msg_disable unnecincl"
CFLAGS="$CFLAGS -msg_disable nestincl"
CFLAGS="$CFLAGS -msg_disable strctpadding"
CFLAGS="$CFLAGS -msg_disable ansialiascast"
CFLAGS="$CFLAGS -msg_disable inlinestoclsmod"
CFLAGS="$CFLAGS -msg_disable cxxkeyword"
CFLAGS="$CFLAGS -msg_disable longlongsufx"
CFLAGS="$CFLAGS -msg_disable valuepres"

# STUB
CFLAGS="$CFLAGS -msg_disable truncintcast"
CFLAGS="$CFLAGS -msg_disable trunclongcast"

CFLAGS="$CFLAGS -msg_disable truncintasn"
CFLAGS="$CFLAGS -msg_disable trunclongint"
CFLAGS="$CFLAGS -msg_disable intconcastsgn"
CFLAGS="$CFLAGS -msg_disable intconstsign"
CFLAGS="$CFLAGS -msg_disable switchlong"
CFLAGS="$CFLAGS -msg_disable subscrbounds2"

CFLAGS="$CFLAGS -msg_disable hexoctunsign"

CFLAGS="$CFLAGS -msg_disable ignorecallval"
CFLAGS="$CFLAGS -msg_disable nonstandcast"
CFLAGS="$CFLAGS -msg_disable embedcomment"
CFLAGS="$CFLAGS -msg_disable unreachcode"
CFLAGS="$CFLAGS -msg_disable questcompare2"
CFLAGS="$CFLAGS -msg_disable unusedtop"
CFLAGS="$CFLAGS -msg_disable unrefdecl"

CFLAGS="$CFLAGS -msg_disable bitnotint"