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57 lines
1.4 KiB
57 lines
1.4 KiB
// Copyright GoFrame Author(https://goframe.org). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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package gstr
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import "strings"
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// IsSubDomain checks whether `subDomain` is sub-domain of mainDomain.
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// It supports '*' in `mainDomain`.
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func IsSubDomain(subDomain string, mainDomain string) bool {
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if p := strings.IndexByte(subDomain, ':'); p != -1 {
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subDomain = subDomain[0:p]
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}
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if p := strings.IndexByte(mainDomain, ':'); p != -1 {
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mainDomain = mainDomain[0:p]
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}
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var (
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subArray = strings.Split(subDomain, ".")
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mainArray = strings.Split(mainDomain, ".")
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subLength = len(subArray)
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mainLength = len(mainArray)
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)
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// Eg:
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// "goframe.org" is not sub-domain of "s.goframe.org".
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if mainLength > subLength {
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for i := range mainArray[0 : mainLength-subLength] {
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if mainArray[i] != "*" {
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return false
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}
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}
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}
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// Eg:
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// "s.s.goframe.org" is not sub-domain of "*.goframe.org"
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// but
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// "s.s.goframe.org" is sub-domain of "goframe.org"
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if mainLength > 2 && subLength > mainLength {
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return false
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}
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minLength := subLength
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if mainLength < minLength {
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minLength = mainLength
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}
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for i := minLength; i > 0; i-- {
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if mainArray[mainLength-i] == "*" {
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continue
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}
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if mainArray[mainLength-i] != subArray[subLength-i] {
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return false
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}
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}
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return true
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}
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