github.com/PetriTurunen/xurls/v2

xurls

Extract urls from text using regular expressions. Requires Go 1.18 or later.

import "mvdan.cc/xurls/v2"

func main() {
	rxRelaxed := xurls.Relaxed()
	rxRelaxed.FindString("Do gophers live in golang.org?")  // "golang.org"
	rxRelaxed.FindString("This string does not have a URL") // ""

	rxStrict := xurls.Strict()
	rxStrict.FindAllString("must have scheme: http://foo.com/.", -1) // []string{"http://foo.com/"}
	rxStrict.FindAllString("no scheme, no match: foo.com", -1)       // []string{}
}

Since API is centered around regexp.Regexp, many other methods are available, such as finding the byte indexes for all matches.

The regular expressions are compiled when the API is first called. Any subsequent calls will use the same regular expression pointers.

cmd/xurls

To install the tool globally:

go install mvdan.cc/xurls/v2/cmd/xurls@latest

$ echo "Do gophers live in http://golang.org?" | xurls
http://golang.org