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 '$remote_addr - $remote_user [$time_local] ' '"$request" $status $bytes_sent ' '"$http_referer" "$http_user_agent" $request_time req_body:"$request_body"';

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

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

}