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Programming language: Go
License: BSD 3-clause "New" or "Revised" License
Tags: Utility     Text Processing    
Latest version: v2.2.0

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README

xurls

GoDoc

Extract urls from text using regular expressions. Requires Go 1.13 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.

Note that calling the exposed functions means compiling a regular expression, so repeated calls should be avoided.

cmd/xurls

To install the tool globally:

cd $(mktemp -d); go mod init tmp; GO111MODULE=on go get mvdan.cc/xurls/v2/cmd/xurls

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