Access to documents in shared folder

Is it possible Rails, access files outside of the folder itself from the

By example, I want to show from my rails application a pdf document,
located in \server_name\shared_folder\document1.pdf

I show the document, located RAILS_ROOT\public\documents\document1.pdf,
but I would like to have the document at the \server_name\shared_folder

Thanks in advance.

Fernando González Macías
fgonzalez @ grupojoly. com