worker_processes  1;

error_log  /var/log/nginx/error.log;
pid        /var/run/nginx.pid;

events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    access_log  /var/log/nginx/proxy_access.log;
    error_log   /var/log/nginx/proxy_error.log;

    sendfile        on;
    keepalive_timeout  180s;
    send_timeout 180s;

    map $request_method $cache_bypass {
        default 0;
        POST 1;
    }

    proxy_cache_path /dev/shm levels=1:2 keys_zone=mcache:16m inactive=600s max_size=512m;
    proxy_cache_methods GET HEAD;
    proxy_cache_min_uses 1;
    proxy_cache_key "$request_method$host$request_uri";
    proxy_cache_use_stale timeout updating;
    proxy_ignore_headers Cache-Control Expires Set-Cookie;

    server {
        listen              80;
        server_name         frontend;

        location /api {
            proxy_pass http://htwkalender-backend:8090;
            client_max_body_size 20m;
            proxy_connect_timeout 600s;
            proxy_read_timeout 600s;
            proxy_send_timeout 600s;
            send_timeout 600s;
        }

        # Cache only specific URI
        location /api/modules {
            proxy_pass http://htwkalender-backend:8090;
            client_max_body_size 20m;
            proxy_connect_timeout 600s;
            proxy_read_timeout 600s;
            proxy_send_timeout 600s;
            send_timeout 600s;
            proxy_cache_bypass 0;
            proxy_no_cache     0;
            proxy_cache        mcache; # mcache=RAM
            proxy_cache_valid 200 301 302  30m;
            proxy_cache_valid 403 404      5m;
            proxy_cache_lock   on;
            proxy_cache_use_stale timeout updating;
            add_header X-Proxy-Cache $upstream_cache_status;
        }

        location /_ {
            proxy_pass http://htwkalender-backend:8090;
        }

        location / {
            proxy_pass http://htwkalender-frontend:8000;
        }
    }
}