I have a weird issue where enabling proxy_caching in nginx disables 304 responses from nginx for the same requests. The server return HTTP 200 responses. My configuration file
daemon off; pid nginx.pid; events {} http { log_format serve-time '$remote_addr - $remote_user [$time_local] ' '"$request" $status $body_bytes_sent ' '"$http_referer" "$http_user_agent" "$request_time" "$http_if_modified_since"'; server { listen 9791 default_server; access_log nginx-access-log.log serve-time; error_log nginx-error-log.log; location ~/insync { return 200; } location ~ / { expires 1d; add_header Cache-Control public; # add the cache status for the response as a header add_header X-Cache-Status $upstream_cache_status; proxy_set_header Host $remote_addr; proxy_set_header If-Modified-Since $http_if_modified_since; proxy_pass http://backend; # use the cache configured above proxy_cache MY_CACHE; # cache only 200 Ok requests for 365 days proxy_cache_valid 200 365d; } } upstream backend { server localhost:9792; } proxy_cache_path nginx-cache/ levels=1:2 keys_zone=MY_CACHE:100m max_size=90g inactive=365d; } When cache is enabled, the server returns 200 OK responses. When I comment out proxy_cache_valid statement (which disables cache), the server returns HTTP 304 for same requests. I am issuing requests as follows
curl -i -H "If-Modified-Since: Thu, 28 May 2020 21:43:48 GMT" "http://localhost:9791/hello" Anyone know what I am doing wrong here?
