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20 lines
710 B
Go
20 lines
710 B
Go
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// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package dnsname contains string functions for working with DNS names.
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package dnsname
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import "strings"
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// HasSuffix reports whether the provided DNS name ends with the
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// component(s) in suffix, ignoring any trailing dots.
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//
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// If suffix is the empty string, HasSuffix always reports false.
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func HasSuffix(name, suffix string) bool {
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name = strings.TrimSuffix(name, ".")
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suffix = strings.TrimSuffix(suffix, ".")
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nameBase := strings.TrimSuffix(name, suffix)
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return len(nameBase) < len(name) && strings.HasSuffix(nameBase, ".")
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}
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