simple server listening on port

listenport.bash

# simple server listening on port
# for extra (http) functions see: https://github.com/coderofsalvation/bashwapp/blob/master/app
# @dependancy nc
# usage: POST=8000 listenport
#        telnet localhost 8000

[[ ! -n $PORT ]] && PORT=8000 # allow port to be passed on commandline

listenport(){
  TMPFILE="/tmp/.myapp.$(whoami)"; CLIENT="$TMPFILE.fifo.$PORT.$(whoami)"
  [[ ! -p $CLIENT ]] && mkfifo $CLIENT 
  while [[ -p $CLIENT ]]; do cat $CLIENT | nc -v -l $PORT 2>&1 | onRequest "$CLIENT"; done
  rm $TMPFILE.*
}

onRequest(){
  request="$(cat - )"
  echo "OK\r\n" > "$1" 
  echo "incoming = $request"
}