Hello and sorry for my spelling, I am French and I still have trouble with
English...

I would like to upload a topic on a forum, this topic contains many pages. The
problem is that I only want to download the pages of this topic, without
downloading anything else on the site. It's a popular forum and the other
topics are too numerous to download all of them, so I need the pages of one
topic.

I think it would be possible by sorting the URLs on the site to accept only
those starting according to my rules, but I don't know how to do it. Can you
help me? Thanks in advance.