events {
    worker_connections 1024;
}

http {
    client_body_temp_path /etc/nginx/data/temp;
    proxy_temp_path /etc/nginx/data/temp;
    fastcgi_temp_path /etc/nginx/data/temp;
    uwsgi_temp_path /etc/nginx/data/temp;
    scgi_temp_path /etc/nginx/data/temp;

    proxy_cache_path /etc/nginx/data/cache levels=1:2 keys_zone=api_cache:10m max_size=100g inactive=365d;

    error_log /dev/stdout warn;

    log_format main '$remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" cache:$upstream_cache_status';
    access_log /dev/stdout main;

    resolver 127.0.0.11 valid=60s;

    server {
        listen 3000;

        location / {
            # If no url parameter, serve the readme
            if ($arg_url = "") {
                rewrite ^ /index.html last;
            }

            proxy_pass $arg_url;
            proxy_http_version 1.1;
            proxy_set_header Host $proxy_host;
            proxy_ssl_server_name on;

            proxy_cache api_cache;
            proxy_cache_valid 200 201 202 203 204 205 206 207 208 226 365d;

            proxy_cache_bypass $http_x_nocache;
            proxy_no_cache $http_x_nocache;

            proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504;

            add_header X-Cache-Status $upstream_cache_status always;
        }

        location = /index.html {
            root /usr/share/nginx/html;
        }
    }
}