Multiple brace expansion in wget URL

Question

I am currently trying to scrape images of a website with a little script I've made :

for url in $my_url/{1..100}'.png' 
do
    wget "$url" || break
done

The fast is that sometimes, images are named 1.png or 01.png or 001.png

So I would like to try the download of the images with each name to not miss any pictures.

Something like :

for url in $my_url/{1..100}{01..100}{001..100}'.png' 

Thanks for the help !

Answer 1

Try wrapping everything in a for loop that creates multiple zero-padding formats:

for format in %01g %02g %03g
  do for num in $(seq -f $format 1 100)
    do wget ${my_url}/${num}.png || break  
  done  
done

You could also use printf, but would need to use different syntax, as shown here.