proxy_cache_path /tmp/nginx-cache levels=1:2 keys_zone=STATIC:100m max_size=1000m inactive=24h use_temp_path=off;

server {
  listen 80;
  server_name __hostname__;
  root /var/www/danbooru2/current/public;
  index index.html;
  access_log /var/log/nginx/danbooru.access.log;
  error_log /var/log/nginx/danbooru.error.log;
  client_max_body_size 35m;
  location /stylesheets {
    expires max;
    break;
  }
  location /javascripts {
    expires max;
    break;
  }
  #location /ssd {
  #  rewrite ^/ssd(.*)$ $1;
  #}
  location /data {
    # if you want to block hotlinking
    valid_referers none __hostname__ ~\.google\. ~\.bing\. ~\.yahoo\.;
    if ($invalid_referer) {
      return 403;
    }
    rewrite ^/data/sample/__.+?__(.+) /data/sample/$1 last;
    rewrite ^/data/__.+?__(.+) /data/$1 last;
    expires max;
    break;
  }

  # to enable s3 proxy
  location ~ ^/cached/data/(.+) {
    rewrite ^/cached/data/sample/__.+?__(.+) /cached/data/sample/$1;
    rewrite ^/cached/data/__.+?__(.+) /cached/data/$1;
    if ($uri ~ "/cached/data/(.+)") {
      set $s3_bucket 's3.amazonaws.com';
      set $url_full $1;
    }

    proxy_set_header Host $s3_bucket;
    proxy_set_header Authorization '';
    proxy_hide_header x-amz-id-2;
    proxy_hide_header x-amz-request-id;
    proxy_hide_header Set-Cookie;

    proxy_cache STATIC;
    proxy_ignore_headers Set-Cookie Cache-Control X-Accel-Expires Expires;
    proxy_cache_valid 200 48h;
    proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504;
    proxy_cache_key "$uri";
    proxy_cache_min_uses 2;
    add_header X-Cache-Status $upstream_cache_status;
    proxy_pass https://$s3_bucket/BUCKET_NAME/$url_full;

    break;
  }

  location /maintenance.html {
    expires 10;
   }
  if (-f $document_root/maintenance.html) {
    rewrite ^(.*)$ /maintenance.html last;
    break;
  }
  location @app_server {
    proxy_pass http://app_server;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_redirect off;
    proxy_set_header Host $host:$server_port;
    proxy_set_header X-Forwarded-Proto http;
  }

  location / {
    try_files $uri @app_server;
  }
  error_page 404 /404.html;
  error_page 500 502 503 504 /500.html;
}

upstream app_server {
  server 127.0.0.1:9000;
}