#!/bin/bash

 if [ "$1" = "" ]; then
 echo "Usage: `basename $0` <4chan thread url> <dirname>"
 exit 1
 fi

 echo "4chan Scrapper"
 echo "Downloading untill canceled or 404'd"
 echo "Downloading to $2"

 [ -d "$2" ] || mkdir -p $2

 cd $2

 while [ "1" = "1" ]; do
 TMP=`mktemp`
 TMP2=`mktemp`
 TMP3=`mktemp`

 wget -O "$TMP" "$1"
 if [ "$?" != "0" ]; then
 rm $TMP $TMP2 $TMP3
 exit 1
 fi

 egrep '//images.4chan.org/[a-z0-9]+/src/([0-9]*).(jpg|png|gif)' "$TMP" -o > "$TMP2"
 sed 's/^/http:/' $TMP2 > $TMP3
 wget -nc -i $TMP3

 rm $TMP $TMP2 $TMP3

 echo "Waiting 5 seconds before next run"

 sleep 5

 done;