mirror of
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37 lines
1.2 KiB
Go
37 lines
1.2 KiB
Go
/*
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Maddy Mail Server - Composable all-in-one email server.
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Copyright © 2019-2020 Max Mazurov <fox.cpp@disroot.org>, Maddy Mail Server contributors
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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package dns
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import (
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"golang.org/x/net/idna"
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"golang.org/x/text/unicode/norm"
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)
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// SelectIDNA is a convenience function for encoding to/from Punycode.
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//
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// If ulabel is true, it returns U-label encoded domain in the Unicode NFC
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// form.
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// If ulabel is false, it returns A-label encoded domain.
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func SelectIDNA(ulabel bool, domain string) (string, error) {
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if ulabel {
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uDomain, err := idna.ToUnicode(domain)
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return norm.NFC.String(uDomain), err
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}
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return idna.ToASCII(domain)
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}
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