atget

#!/usr/bin/env bash
# Anti-Throttling GET
# This script has a problem where the filename
# has to be listed before any options or the
# program chokes.  I'm too lazy to fix it. :P

file="$1"
shift
declare -i timeout=5
declare -i randbase=500

while getopts ":T:R:" opt
do
    case $opt in
      T) let timeout=$OPTARG;;
      R) let randbase=$OPTARG;;
      \?) echo "Invalid option: -$OPTARG" >&2;;
    esac
done

while true
do
    wget -c -T $timeout "$file"
    declare -i p=$randbase*100  # 1/100 seconds base
    declare -i q=$RANDOM%$p+1   # 1/100 seconds delay
    declare -i r=$q*10000       # microseconds delay
    declare -i s=$q%100         # fractional part
    declare -i t=$q/100         # integer part
    echo "Waiting $t.$s seconds..."
    usleep $r
    unset p q r s t
done