id summary reporter owner description type status priority milestone component version resolution keywords cc uname nginx_version 558 Conditional (If-None-Match) requests against cached content require Last-Modified header Owen Garrett "Summary - conditional requests using If-None-Match ""eTag"" don't match content that does not also have a Last-Modified header. '''Expected behavior:''' Content cache stores content with etag. Requests with ‘if-none-match’ should honor that etag '''Observed behaviour: ''' Requests only honor that etag if the response /also/ contains a ‘last-modified’ header Test case: Architecture: http proxy with cache -> fastcgi proxy -> php script '''Test 1 – provide a last-modified header – works as expected:''' Prime the empty cache: # curl -D - http://localhost:8001/time.php HTTP/1.1 200 OK Server: nginx/1.5.12 Date: Sun, 04 May 2014 23:31:55 GMT Content-Type: text/html Transfer-Encoding: chunked Connection: keep-alive X-Powered-By: PHP/5.3.10-1ubuntu3.11 Cache-Control: max-age=600 ETag: foo Last-Modified: Sat, 02 Nov 2013 14:53:29 GMT X-Cache-Status: MISS 1399246315 Request the content with if-none-match - works as expected: # curl -D - -H ""If-None-Match: foo"" http://localhost:8001/time.php HTTP/1.1 304 Not Modified Server: nginx/1.5.12 Date: Sun, 04 May 2014 23:32:09 GMT Connection: keep-alive X-Powered-By: PHP/5.3.10-1ubuntu3.11 Cache-Control: max-age=600 ETag: foo Last-Modified: Sat, 02 Nov 2013 14:53:29 GMT X-Cache-Status: HIT '''Test 2 – omit last-modified – the if-none-match does not apply: ''' Prime the empty cache: # curl -D - http://localhost:8001/time.php HTTP/1.1 200 OK Server: nginx/1.5.12 Date: Sun, 04 May 2014 23:32:42 GMT Content-Type: text/html Transfer-Encoding: chunked Connection: keep-alive X-Powered-By: PHP/5.3.10-1ubuntu3.11 Cache-Control: max-age=600 ETag: foo X-Cache-Status: MISS 1399246362 '''Request the content with if-none-match - we get a 200, not a 304: ''' # curl -D - -H ""If-None-Match: foo"" http://localhost:8001/time.php HTTP/1.1 200 OK Server: nginx/1.5.12 Date: Sun, 04 May 2014 23:32:50 GMT Content-Type: text/html Transfer-Encoding: chunked Connection: keep-alive X-Powered-By: PHP/5.3.10-1ubuntu3.11 Cache-Control: max-age=600 ETag: foo X-Cache-Status: HIT 1399246362 " enhancement closed minor nginx-core 1.5.x fixed etag if-none-match Linux dev 3.8.0-29-generic #42~precise1-Ubuntu SMP Wed Aug 14 16:19:23 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux "nginx version: nginx/1.5.12 built by gcc 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) TLS SNI support enabled configure arguments: --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --http-client-body-temp-path=/var/cache/nginx/client_temp --http-proxy-temp-path=/var/cache/nginx/proxy_temp --http-fastcgi-temp-path=/var/cache/nginx/fastcgi_temp --http-uwsgi-temp-path=/var/cache/nginx/uwsgi_temp --http-scgi-temp-path=/var/cache/nginx/scgi_temp --user=nginx --group=nginx --with-http_ssl_module --with-http_realip_module --with-http_addition_module --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_f4f_module --with-http_hls_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_session_log_module --with-syslog --with-http_stub_status_module --with-http_auth_request_module --with-mail --with-mail_ssl_module --with-file-aio --with-http_spdy_module --with-ipv6 --with-http_perl_module --with-http_image_filter_module --with-http_geoip_module --with-http_xslt_module --add-module=debian/extra/ngx_devel_kit-0.2.19 --add-module=debian/extra/lua-nginx-module-0.9.4 --add-module=debian/extra/headers-more-nginx-module-0.25 --add-module=debian/extra/set-misc-nginx-module-0.24 --add-module=debian/extra/passenger-4.0.41/ext/nginx --with-cc-opt='-g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wformat-security -Wp,-D_FORTIFY_SOURCE=2' --with-ld-opt='-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,--as-needed'"