www: only emit ASCII chars in attachment filenames

[public-inbox.git] / lib / PublicInbox / View.pm

diff --git a/lib/PublicInbox/View.pm b/lib/PublicInbox/View.pm
index 09afdaf1bd15aa728766eb3104ff32d43057567c..83ae99bca822f103c1479a0100f2dd4b93580915 100644 (file)
--- a/lib/PublicInbox/View.pm
+++ b/lib/PublicInbox/View.pm
@@ -528,7 +528,7 @@ sub attach_link ($$$$;$) {
        $desc = $fn unless defined $desc;
        $desc = '' unless defined $desc;
        my $sfn;
-       if (defined $fn && $fn =~ /\A[[:alnum:]][\w\.-]+[[:alnum:]]\z/) {
+       if (defined $fn && $fn =~ /\A$PublicInbox::Hval::FN\z/o) {
                $sfn = $fn;
        } elsif ($ct eq 'text/plain') {
                $sfn = 'a.txt';