You could use URI::QueryParam which has the query_param() method that works just like CGI's param() method:

use URI;
use URI::QueryParam;

my $info = "/?foo=Zoo&foo=aha";
my $uri = URI->new($info);

my %params;
for my $name ($uri->query_param) {
    my @values = $uri->query_param($name);
    $params{$name} = @values > 1 ? \@values : $values[0];
}
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