Netcat HTTP server (/bin/bash http.sh 9000)

http.sh

#!/bin/bash
# https://gist.github.com/marcellodesales/9e4288f35ac2cc3e1b83

PORT="$1"
OUTPUT="/tmp/stdout"
rm -f $OUTPUT
mkfifo $OUTPUT

trap "rm -f $OUTPUT" EXIT
echo "Starting HTTP server"
echo "Listening on port $PORT"

while true
do cat $OUTPUT | nc -l $PORT > >(
	export REQUEST=
	while read LINE
	do LINE=$(echo "$LINE" | tr -d '[\r\n]')
             if echo "$LINE" | grep -qE '^GET /' # HTTP GET request
             then REQUEST=$(echo "$LINE" | cut -d ' ' -f2) # extract the request
             elif [ "x$LINE" = x ] # empty line / end of request
             then HTTP_LOCATION="Location:"
             	  HTTP_200="HTTP/1.1 200 OK"
             	  HTTP_404="HTTP/1.1 404 Not Found"
             
             	  # location ^/echo/$
             	  if echo $REQUEST | grep -qE '^/echo/'
             	  then printf "%s\n%s %s\n\n%s\n" "$HTTP_200" "$HTTP_LOCATION" $REQUEST ${REQUEST#"/echo/"} > $OUTPUT
  
             	  # location ^/date
             	  elif echo $REQUEST | grep -qE '^/date'
             	  then date > $OUTPUT

             	  # location ^/stats
             	  elif echo $REQUEST | grep -qE '^/stats'
             	  then vmstat -S M > $OUTPUT

             	  # location ^/net
             	  elif echo $REQUEST | grep -qE '^/net'
             	  then ifconfig > $OUTPUT

             	  # location *
             	  else printf "%s\n%s %s\n\n%s\n" "$HTTP_404" "$HTTP_LOCATION" $REQUEST "Resource $REQUEST NOT FOUND!" > $OUTPUT
             	  fi
             fi
	done)
done