Yes, this would work as long as the " http://www.mydomain.com/res
" folder has "write" permissions enabled.
What I'm thinking is that I would make it so that the user can "save as" to any folder in their Upload Group.
So if they have three folders specified in their upload group, then they would have three choices where to save the new file. (Using any name they wanted...)
If the user is not assigned any upload group, then it likely means the admin wants to keep the user very controlled.. in which case it is natural that they would NOT be allowed to "save as".
What do you think of that?
The advantage here is that the Upload Group already has folders defined, and they already would have write permissions... and the user already has ability to upload into them for new files, etc...