mirror of
https://github.com/kubernetes-sigs/external-dns.git
synced 2026-05-04 14:21:33 +02:00
46 lines
1.2 KiB
Go
46 lines
1.2 KiB
Go
/*
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Copyright 2025 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package idna
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import (
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"strings"
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log "github.com/sirupsen/logrus"
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"golang.org/x/net/idna"
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)
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var (
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Profile = idna.New(
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idna.MapForLookup(),
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idna.Transitional(true),
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idna.StrictDomainName(false),
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)
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)
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// NormalizeDNSName converts a DNS name to a canonical form, so that we can use string equality
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// it: removes space, get ASCII version of dnsName complient with Section 5 of RFC 5891, ensures there is a trailing dot
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func NormalizeDNSName(dnsName string) string {
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s, err := Profile.ToASCII(strings.TrimSpace(dnsName))
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if err != nil {
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log.Warnf(`Got error while parsing DNSName %s: %v`, dnsName, err)
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}
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if !strings.HasSuffix(s, ".") {
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s += "."
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}
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return s
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}
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