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26 lines
694 B
Go
26 lines
694 B
Go
8 years ago
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package utils
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import (
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"strings"
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"github.com/pkg/errors"
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)
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// SplitHost returns hostname into domain and subdomain strings.
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// For example:
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// "some.subdomain.example.com" → ("some.subdomain", "example.com", nil)
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// "example.com" → ("", "example.com", nil)
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func SplitHost(host string) (subdomain string, domain string, err error) {
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subdomains := strings.Split(host, ".")
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if len(subdomains) >= 3 {
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domain = strings.Join(subdomains[len(subdomains)-2:], ".")
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subdomain = strings.Join(subdomains[:len(subdomains)-2], ".")
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} else if len(subdomains) == 2 {
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domain = strings.Join(subdomains, ".")
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} else {
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err = errors.New("invalid domain")
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}
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return subdomain, domain, err
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}
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