55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
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package middleware
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import (
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"strings"
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)
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func matchScheme(domain, pattern string) bool {
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didx := strings.Index(domain, ":")
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pidx := strings.Index(pattern, ":")
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return didx != -1 && pidx != -1 && domain[:didx] == pattern[:pidx]
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}
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// matchSubdomain compares authority with wildcard
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func matchSubdomain(domain, pattern string) bool {
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if !matchScheme(domain, pattern) {
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return false
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}
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didx := strings.Index(domain, "://")
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pidx := strings.Index(pattern, "://")
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if didx == -1 || pidx == -1 {
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return false
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}
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domAuth := domain[didx+3:]
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// to avoid long loop by invalid long domain
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if len(domAuth) > 253 {
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return false
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}
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patAuth := pattern[pidx+3:]
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domComp := strings.Split(domAuth, ".")
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patComp := strings.Split(patAuth, ".")
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for i := len(domComp)/2 - 1; i >= 0; i-- {
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opp := len(domComp) - 1 - i
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domComp[i], domComp[opp] = domComp[opp], domComp[i]
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}
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for i := len(patComp)/2 - 1; i >= 0; i-- {
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opp := len(patComp) - 1 - i
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patComp[i], patComp[opp] = patComp[opp], patComp[i]
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}
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for i, v := range domComp {
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if len(patComp) <= i {
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return false
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}
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p := patComp[i]
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if p == "*" {
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return true
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}
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if p != v {
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return false
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}
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}
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return false
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}
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