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pkg/netutil/host_normalize.go
56 строк
2 KB
Ravi Sastry Kadali
Refactor IPv6 address comparison logic
26 июл 2025, 10:08
26 июл 2025, 10:08
ebb0d07
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// Copyright 2025 The etcd Authors // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package netutil import ( "net" "net/url" "strings" ) // urlsHostNormalizedEqual compares two URLs for scheme, normalized host (including IPv6), and path equality. func urlsHostNormalizedEqual(a, b url.URL) bool { return a.Scheme == b.Scheme && normalizeHost(a.Host) == normalizeHost(b.Host) && a.Path == b.Path } // normalizeHost returns the canonical string for the host and normalizes IPv6 and IPv4 addresses. func normalizeHost(host string) string { hostOnly, port, err := net.SplitHostPort(host) if err != nil { hostOnly = host port = "" } // Check if hostOnly is an IPv6 address. It could be with or without brackets. ipStr := strings.Trim(hostOnly, "[]") if ip := net.ParseIP(ipStr); ip != nil { if ip.To4() == nil { // For IPv6 address, always use brackets when there is a port. return "[" + ip.String() + "]" + normalizePort(port) } // IPv4 address return ip.String() + normalizePort(port) } return host } func normalizePort(port string) string { if port == "" { return "" } return ":" + port }