This is a Google Image batch download tool, takes search query as input, resulting a folder containing Google Image search results( usually couple of images). This is a prototype, real product will be created later on.

GoogleImageSearch.sh

# DESCRIPTION
#    This is a Google Image batch download tool, takes search query as input,
#    resulting a folder containing Google Image search results( usually couple of images).
# SYNOPSIS
#    ./GoogleImageSearch.sh QUERY
# EXAMPLE
#    ./GoogleImageSearch.sh 'Linkin Park'

echo 'searching Google Image for' $1 '...';
#replace space with '+', ex."Linkin Park" -> "Linkin+Park"
query=$(echo $1 | sed 's/ /+/g');
#echo $query
url="http://www.google.com.hk/search?q=$query&tbm=isch&sout=1&tbs=isz:ex,iszw:600,iszh:600";
echo $url;

#Step1: use w3m to download wegpage source file
w3m -dump_source $url >GoogleImageSearch.html;

#Step2: fetch imgurl from webpage source file
  #insert newline in front of where string "imgurl" appears
  awk '{gsub(/imgurl/,"\nimgurl");print}' < GoogleImageSearch.html > newline_imgurl;
  #insert newline at the end of where string "jpg" or "png" appears
  awk '{gsub(/jpg/,"jpg\n");print}' < newline_imgurl > newline_jpg;
  awk '{gsub(/png/,"png\n");print}' < newline_jpg > newline_png;
  #grep imgurls
  grep -E "(imgurl=http:[-/.[:alnum:]]*jpg|imgurl=http:[-/.[:alnum:]]*png)" newline_png > remove_imgurl;
  #remove string "imgurl=", left pure url list
  awk '{gsub(/imgurl=/,"");print}' < remove_imgurl > urlList;
  #clear up
  rm newline_imgurl newline_jpg newline_png remove_imgurl;
  # to examine url list: remove '#' below
  #vi urlList;

#Step3: download image files(Input:urlList;Retry:2 times;Output:Fold $query)
wget -i urlList -t 2 -P $query;