#!/bin/bash

bar="============================================="
barlength=${#bar}

URL="https://dl.dropbox.com/u/17706605/N9_QuickTweak_en_v9.4.pdf"
FILE=$(basename $URL)
rm -f $FILE
length=$(curl --head $URL 2>&1 | grep Content-Length | awk '{print $2}' | sed 's/.$//')
wget $URL 2>/dev/null &

while [ ! -f $FILE ] ;
do
      sleep 0.1
done

i=1

while [[ $i -lt $length ]]; do
  i=$(stat "$FILE" | grep Size | awk '{print $2}')
  n=$(($i * $barlength / $length))
  printf "\r[%-${barlength}s]" "${bar:0:n}"
  sleep 0.2
done
echo ""