For anyone baffled by this: This works because HTTP/0.9 (just called "HTTP" at the time) worked in an extremely simple way, and browsers mostly retained compati

For anyone baffled by this: This works because HTTP/0.9 (just called "HTTP" at the time) worked in an extremely simple way, and browsers mostly retained compatibility for this. HTTP/0.9 web browser sends: GET / Netcat sends: <!doctype html> ... Nowadays a browser will send `GET / HTTP/1.1` and then a bunch of headers, which a true HTTP/0.9 server may be able to filter out and ignore, but of course this script will just send the document and the browser will still assume it's a legacy server.