Shell Web Server

server.sh

#!/bin/zsh
rm -f fifo0; rm -f fifo1; rm -f debug
function routine() {
    while true
    do
        # Parse Request
        http_method="";http_path="";http_version="";http_header=""; http_body="";
        target="http_request_line"
        while read line
        do
            line=`echo $line | tr -d '\r' | tr -d '\n'`
            echo $line > debug
            if [[ "$target" == "http_request_line" ]];then
                http_method=`echo $line | cut -d' ' -f1`
                http_path=`echo $line | cut -d' ' -f2`
                http_version=`echo $line | cut -d' ' -f3`
                [[ $http_version =~ '^HTTP' ]] && target="http_header"
            elif [[ "$target" == "http_header" ]];then
                if [[ "$line" == "" ]];then
                    target="http_body"
                    echo -n "\r\n\r\n" > fifo0
                fi
                http_header="$http_header$line"
            elif [[ "$target" == "http_body" ]];then
                [[ "$line" == "" ]] && break
                http_body="$http_body$line"
            fi
        done
        
        # Make Response Body
        response_body=$http_body
        
        # Respond HTTP
        echo -n "$http_version 200 OK\r\n"
        echo -n "Date: `date -u "+%Y-%m-%d %H:%M:%S GMT"`\r\n"
        echo -n "Content-Length: $((${#response_body}+4))\r\n"
        echo -n "\r\n"
        echo -n $response_body
        echo -n "\r\n"
        echo -n "\r\n"
    done
}
mkfifo fifo0 fifo1 debug
exec 3<> fifo0;exec 4<> fifo1;exec 5<> debug
cat debug&
nc -lk 8080 > fifo0 < fifo1 &
nc_pid=$!
trap "
  echo \"shutting...\" >&2
  exec 3<&-;exec 4<&-;exec 5<&-
  kill $nc_pid
  rm -f fifo0;rm -f fifo1;rm -f debug
  exit 1
" 2
echo "Listening 8080 ($nc_pid)"
routine < fifo0 > fifo1