gistfile1.txt

user www-data;
worker_processes auto;
pid /run/nginx.pid;
include /etc/nginx/modules-enabled/*.conf;

events {
    worker_connections 768;
}

http {

    include /etc/nginx/mime.types;
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    log_format postdata $request_body;

    map $request_body $matched {
        "~*true" 1;
        default 0;
    }
    

    server {
        location ~ /$ {
            
            access_log /var/log/nginx/access.log postdata;
            echo_read_request_body;
            if ($matched = 0) { return 503; }
            if ($matched = 1) { return 504; }
        }
    }

}