my $url = ' http://www.perlmonks.com/foo?bar=baz';

print "Downloading >$url<\n"; # note use of delimiters to make a stray 
                              # leading space more visible in your debug

my $ff = File::Fetch->new(uri => $url);
say "scheme:      " . $ff->scheme;
say "host:        " . $ff->host;
say "path:        " . $ff->path;
say "file:        " . $ff->file;
say "output_file: " . $ff->output_file;