id summary reporter owner description type status priority milestone component version resolution keywords cc uname nginx_version 273 proxy_cache not work for 204 responses Cícero Verneck Corrêa "Nginx configuration for the application: {{{ location / { uwsgi_pass unix:/var/tmp/x.sock; uwsgi_cache palco_cache; uwsgi_cache_valid 404 1m; uwsgi_cache_valid 302 8h; uwsgi_cache_valid 200 204 7d; uwsgi_cache_key $uri$is_args$args; uwsgi_cache_lock on; uwsgi_cache_use_stale error updating timeout invalid_header http_500; uwsgi_cache_purge PURGE from all; include uwsgi_params; add_header X-Cache $upstream_cache_status; uwsgi_ignore_headers ""Expires"" ""Cache-Control""; } }}} The test application has a page that returns 200 and a content whatsoever, and another that returns 204 with the contents empty. Below lay the answer to both. 204 HEADER: {{{ HTTP/1.1 204 NO CONTENT Connection: keep-alive Content-Length: 0 Content-Type: text/html; charset=utf-8 Date: Fri, 04 Jan 2013 21:19:51 GMT Server: nginx X-Cache: MISS }}} 200 HEADER: {{{ HTTP/1.1 200 OK Connection: keep-alive Content-Encoding: gzip Content-Type: text/html; charset=utf-8 Date: Fri, 04 Jan 2013 21:37:00 GMT Server: nginx Transfer-Encoding: chunked Vary: Accept-Encoding X-Cache: HIT }}} No matter the number of requests, a request that returns 204 is never cached. " defect closed major nginx-core 1.3.x worksforme cache, 204 Linux 10x 2.6.38-16-server #67-Ubuntu SMP Thu Sep 6 18:15:24 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux "nginx version: nginx/1.2.6 built by gcc 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4) TLS SNI support enabled configure arguments: --prefix=/usr/share/nginx --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-client-body-temp-path=/var/lib/nginx/body --http-fastcgi-temp-path=/var/lib/nginx/fastcgi --http-log-path=/var/log/nginx/access.log --http-proxy-temp-path=/var/lib/nginx/proxy --http-scgi-temp-path=/var/lib/nginx/scgi --http-uwsgi-temp-path=/var/lib/nginx/uwsgi --lock-path=/var/lock/nginx.lock --pid-path=/run/nginx.pid --with-pcre-jit --with-debug --with-http_addition_module --with-http_dav_module --with-http_geoip_module --with-http_gzip_static_module --with-http_realip_module --with-http_stub_status_module --with-http_ssl_module --with-http_sub_module --with-http_xslt_module --with-ipv6 --with-sha1=/usr/include/openssl --with-md5=/usr/include/openssl --with-mail --with-mail_ssl_module --add-module=/home/studiosol/nginx_src/ngx_cache_purge"