26 lines
423 B
Go
26 lines
423 B
Go
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package url
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import (
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"errors"
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"strings"
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)
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var errNoScheme = errors.New("no scheme")
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var errEmptyURL = errors.New("URL cannot be empty")
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// schemeFromURL returns the scheme from a URL string
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func SchemeFromURL(url string) (string, error) {
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if url == "" {
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return "", errEmptyURL
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}
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i := strings.Index(url, ":")
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// No : or : is the first character.
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if i < 1 {
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return "", errNoScheme
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}
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return url[0:i], nil
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}
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