39 lines
901 B
Go
39 lines
901 B
Go
package util
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import "strings"
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// ValidOptionalPort reports whether port is either an empty string
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// or matches /^:\d*$/
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func ValidOptionalPort(port string) bool {
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if port == "" {
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return true
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}
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if port[0] != ':' {
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return false
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}
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for _, b := range port[1:] {
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if b < '0' || b > '9' {
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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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// SplitHostPort separates host and port. If the port is not valid, it returns
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// the entire input as host, and it doesn't check the validity of the host.
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// Unlike net.SplitHostPort, but per RFC 3986, it requires ports to be numeric.
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func SplitHostPort(hostPort string) (host, port string) {
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host = hostPort
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colon := strings.LastIndexByte(host, ':')
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if colon != -1 && ValidOptionalPort(host[colon:]) {
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host, port = host[:colon], host[colon+1:]
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}
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if strings.HasPrefix(host, "[") && strings.HasSuffix(host, "]") {
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host = host[1 : len(host)-1]
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}
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return
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}
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