problem with filenames containing spaces

[GoogleCodeExporter]

I get a Forbidden error for URLs generated for files that names' contain spaces.
It may happen that there are problems with other special characters in the 
filenames.
I can't rename my files as they are user generated and it is impossible to go 
on the "renaming way".

I already tried using "+" and "%20" instead of " " (space) before generating 
the URL but those are not working.

How can I solve this problem?

Original issue reported on code.google.com by [email protected] on 14 Oct 2014 at 8:51