Webserver with netcat

webserver.sh

#!/bin/bash

main() {
    if [[ $INSIDE_NETCAT ]]; then
        serve_request
    else
        export INSIDE_NETCAT=1
        while :; do
            netcat -q 0 -v -l -p 9000 -c "$0"
        done
    fi
}

serve_request() {
    read request
    while read header && [[ $header != $'\r' ]]; do
        :
    done

    printf "HTTP/1.0 200 OK\r\n"
    printf "Content-type: text/plain; charset=UTF-8\r\n"
    printf "\r\n"
    echo "Bem-vindos! Bem-vindos ao netcat do seu Shitaki. Ok?"
    echo "Request = $request"
}

main