From 37b4d9d179afa470a7faee9ed0c6119cc8b613c0 Mon Sep 17 00:00:00 2001 From: tobi <31960611+tsmethurst@users.noreply.github.com> Date: Sun, 7 May 2023 19:53:21 +0200 Subject: [bugfix] Punycode fixes (#1743) Co-authored-by: kim Co-authored-by: kim <89579420+NyaaaWhatsUpDoc@users.noreply.github.com> --- internal/util/punycode.go | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 internal/util/punycode.go (limited to 'internal/util/punycode.go') diff --git a/internal/util/punycode.go b/internal/util/punycode.go new file mode 100644 index 000000000..4a595a281 --- /dev/null +++ b/internal/util/punycode.go @@ -0,0 +1,44 @@ +// GoToSocial +// Copyright (C) GoToSocial Authors admin@gotosocial.org +// SPDX-License-Identifier: AGPL-3.0-or-later +// +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU Affero General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Affero General Public License for more details. +// +// You should have received a copy of the GNU Affero General Public License +// along with this program. If not, see . + +package util + +import ( + "strings" + + "golang.org/x/net/idna" +) + +// Punify converts the given domain to lowercase +// then to punycode (for international domain names). +// +// Returns the resulting domain or an error if the +// punycode conversion fails. +func Punify(domain string) (string, error) { + domain = strings.ToLower(domain) + return idna.ToASCII(domain) +} + +// DePunify converts the given punycode string +// to its original unicode representation (lowercased). +// Noop if the domain is (already) not puny. +// +// Returns an error if conversion fails. +func DePunify(domain string) (string, error) { + out, err := idna.ToUnicode(domain) + return strings.ToLower(out), err +} -- cgit v1.2.3