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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 | f1daa0356a1d |
children | 78f8ac479735 |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. if [ "$NGX_PLATFORM" != win32 ]; then ngx_feature="C compiler" ngx_feature_name= ngx_feature_run=yes ngx_feature_incs= ngx_feature_path= ngx_feature_libs= ngx_feature_test= . auto/feature if [ $ngx_found = no ]; then echo echo $0: error: C compiler $CC is not found echo exit 1 fi fi if [ "$CC" = cl ]; then if `$NGX_WINE $CC -v 2>&1 \ | grep '^Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16' \ >/dev/null 2>&1`; then NGX_CC_NAME=msvc10 echo " + using Microsoft Visual C++ 10 compiler" elif `$NGX_WINE $CC -v 2>&1 \ | grep '^Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14' \ >/dev/null 2>&1`; then NGX_CC_NAME=msvc8 echo " + using Microsoft Visual C++ 8 compiler" elif `$NGX_WINE $CC -v 2>&1 \ | grep '^Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 13' \ >/dev/null 2>&1`; then NGX_CC_NAME=msvc7 echo " + using Microsoft Visual C++ 7 compiler" else NGX_CC_NAME=msvc echo " + using Microsoft Visual C++ compiler" fi elif [ "$CC" = wcl386 ]; then NGX_CC_NAME=owc echo " + using Open Watcom C compiler" elif [ "$CC" = bcc32 ]; then NGX_CC_NAME=bcc echo " + using Borland C++ compiler" elif `$CC -V 2>&1 | grep '^Intel(R) C' >/dev/null 2>&1`; then NGX_CC_NAME=icc echo " + using Intel C++ compiler" elif `$CC -v 2>&1 | grep 'gcc version' >/dev/null 2>&1`; then NGX_CC_NAME=gcc echo " + using GNU C compiler" elif `$CC -v 2>&1 | grep '\(clang\|LLVM\) version' >/dev/null 2>&1`; then NGX_CC_NAME=clang echo " + using Clang C compiler" elif `$CC -V 2>&1 | grep 'Sun C' >/dev/null 2>&1`; then NGX_CC_NAME=sunc echo " + using Sun C compiler" elif `$CC -V 2>&1 | grep '^Compaq C' >/dev/null 2>&1`; then NGX_CC_NAME=ccc echo " + using Compaq C compiler" elif `$CC -V 2>&1 | grep '^aCC: ' >/dev/null 2>&1`; then NGX_CC_NAME=acc echo " + using HP aC++ compiler" else NGX_CC_NAME=unknown fi