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28 lines
530 B
Go
28 lines
530 B
Go
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package utils
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import (
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"net/url"
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"strings"
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)
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// HostnameFromAddr determines the hostname in an address string
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func HostnameFromAddr(addr string) (string, error) {
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p, err := url.Parse(addr)
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if err != nil {
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return "", err
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}
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h := p.Host
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// copied from https://golang.org/src/net/http/transport.go
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if hasPort(h) {
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h = h[:strings.LastIndex(h, ":")]
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}
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return h, nil
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}
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// copied from https://golang.org/src/net/http/http.go
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func hasPort(s string) bool {
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return strings.LastIndex(s, ":") > strings.LastIndex(s, "]")
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}
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