#!/bin/bash

step=1000
size=100000489
end=$size
part=$(expr $end - $step)

while [ 1 ]; do

  GOT=`echo -en "GET /secret_memo.txt HTTP/1.0\nRange: bytes=$part-$end\n\n" | nc 119.70.231.180 80`
  TEST=`echo $GOT | grep "Partial Content"`

  echo "$GOT"

  if [ "$?" == "0" ]; then
    echo "PART $part: $GOT"
    part=$end
    exit 0
  fi

done