fhir-cache.conf

proxy_cache_path /tmp/nginx keys_zone=FHIR:10m;

# our origin server with added Cache-Control headers since HAPI has none
server {
    listen 8080;

    location / {
        proxy_pass http://hapi.fhir.org/;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        add_header Cache-Control "public, must-revalidate, max-age=1";
        
        # uncomment to add a Vary header to the origin server
        # add_header Vary "accept, accept-encoding";
    }
}

# our caching reverse proxy
server {
    listen 8081;

    location / {
        proxy_pass http://localhost:8080/;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_cache FHIR;
        proxy_cache_revalidate on;
        add_header X-Proxy-Cache $upstream_cache_status;
    }
}